74a3468e48c2b67949afffed87ca6283ab2a6945
[ffmpeg.git] / libavcodec / mpegvideo_enc.c
1 /*
2  * The simplest mpeg encoder (well, it was the simplest!)
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * 4MV & hq & B-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>
7  *
8  * This file is part of Libav.
9  *
10  * Libav is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * Libav is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with Libav; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24
25 /**
26  * @file
27  * The simplest mpeg encoder (well, it was the simplest!).
28  */
29
30 #include "libavutil/internal.h"
31 #include "libavutil/intmath.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/opt.h"
35 #include "avcodec.h"
36 #include "dct.h"
37 #include "dsputil.h"
38 #include "mpeg12.h"
39 #include "mpegvideo.h"
40 #include "h261.h"
41 #include "h263.h"
42 #include "mathops.h"
43 #include "mjpegenc.h"
44 #include "msmpeg4.h"
45 #include "faandct.h"
46 #include "thread.h"
47 #include "aandcttab.h"
48 #include "flv.h"
49 #include "mpeg4video.h"
50 #include "internal.h"
51 #include "bytestream.h"
52 #include <limits.h>
53
54 static int encode_picture(MpegEncContext *s, int picture_number);
55 static int dct_quantize_refine(MpegEncContext *s, int16_t *block, int16_t *weight, int16_t *orig, int n, int qscale);
56 static int sse_mb(MpegEncContext *s);
57 static void denoise_dct_c(MpegEncContext *s, int16_t *block);
58 static int dct_quantize_trellis_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
59
60 static uint8_t default_mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
61 static uint8_t default_fcode_tab[MAX_MV * 2 + 1];
62
63 const AVOption ff_mpv_generic_options[] = {
64     FF_MPV_COMMON_OPTS
65     { NULL },
66 };
67
68 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64],
69                        uint16_t (*qmat16)[2][64],
70                        const uint16_t *quant_matrix,
71                        int bias, int qmin, int qmax, int intra)
72 {
73     int qscale;
74     int shift = 0;
75
76     for (qscale = qmin; qscale <= qmax; qscale++) {
77         int i;
78         if (dsp->fdct == ff_jpeg_fdct_islow_8 ||
79             dsp->fdct == ff_jpeg_fdct_islow_10 ||
80             dsp->fdct == ff_faandct) {
81             for (i = 0; i < 64; i++) {
82                 const int j = dsp->idct_permutation[i];
83                 /* 16 <= qscale * quant_matrix[i] <= 7905
84                  * Assume x = ff_aanscales[i] * qscale * quant_matrix[i]
85                  *             19952 <=              x  <= 249205026
86                  * (1 << 36) / 19952 >= (1 << 36) / (x) >= (1 << 36) / 249205026
87                  *           3444240 >= (1 << 36) / (x) >= 275 */
88
89                 qmat[qscale][i] = (int)((UINT64_C(1) << QMAT_SHIFT) /
90                                         (qscale * quant_matrix[j]));
91             }
92         } else if (dsp->fdct == ff_fdct_ifast) {
93             for (i = 0; i < 64; i++) {
94                 const int j = dsp->idct_permutation[i];
95                 /* 16 <= qscale * quant_matrix[i] <= 7905
96                  * Assume x = ff_aanscales[i] * qscale * quant_matrix[i]
97                  *             19952 <=              x  <= 249205026
98                  * (1 << 36) / 19952 >= (1 << 36) / (x) >= (1 << 36) / 249205026
99                  *           3444240 >= (1 << 36) / (x) >= 275 */
100
101                 qmat[qscale][i] = (int)((UINT64_C(1) << (QMAT_SHIFT + 14)) /
102                                         (ff_aanscales[i] * qscale *
103                                          quant_matrix[j]));
104             }
105         } else {
106             for (i = 0; i < 64; i++) {
107                 const int j = dsp->idct_permutation[i];
108                 /* We can safely suppose that 16 <= quant_matrix[i] <= 255
109                  * Assume x = qscale * quant_matrix[i]
110                  * So             16 <=              x  <= 7905
111                  * so (1 << 19) / 16 >= (1 << 19) / (x) >= (1 << 19) / 7905
112                  * so          32768 >= (1 << 19) / (x) >= 67 */
113                 qmat[qscale][i] = (int)((UINT64_C(1) << QMAT_SHIFT) /
114                                         (qscale * quant_matrix[j]));
115                 //qmat  [qscale][i] = (1 << QMAT_SHIFT_MMX) /
116                 //                    (qscale * quant_matrix[i]);
117                 qmat16[qscale][0][i] = (1 << QMAT_SHIFT_MMX) /
118                                        (qscale * quant_matrix[j]);
119
120                 if (qmat16[qscale][0][i] == 0 ||
121                     qmat16[qscale][0][i] == 128 * 256)
122                     qmat16[qscale][0][i] = 128 * 256 - 1;
123                 qmat16[qscale][1][i] =
124                     ROUNDED_DIV(bias << (16 - QUANT_BIAS_SHIFT),
125                                 qmat16[qscale][0][i]);
126             }
127         }
128
129         for (i = intra; i < 64; i++) {
130             int64_t max = 8191;
131             if (dsp->fdct == ff_fdct_ifast) {
132                 max = (8191LL * ff_aanscales[i]) >> 14;
133             }
134             while (((max * qmat[qscale][i]) >> shift) > INT_MAX) {
135                 shift++;
136             }
137         }
138     }
139     if (shift) {
140         av_log(NULL, AV_LOG_INFO,
141                "Warning, QMAT_SHIFT is larger than %d, overflows possible\n",
142                QMAT_SHIFT - shift);
143     }
144 }
145
146 static inline void update_qscale(MpegEncContext *s)
147 {
148     s->qscale = (s->lambda * 139 + FF_LAMBDA_SCALE * 64) >>
149                 (FF_LAMBDA_SHIFT + 7);
150     s->qscale = av_clip(s->qscale, s->avctx->qmin, s->avctx->qmax);
151
152     s->lambda2 = (s->lambda * s->lambda + FF_LAMBDA_SCALE / 2) >>
153                  FF_LAMBDA_SHIFT;
154 }
155
156 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
157 {
158     int i;
159
160     if (matrix) {
161         put_bits(pb, 1, 1);
162         for (i = 0; i < 64; i++) {
163             put_bits(pb, 8, matrix[ff_zigzag_direct[i]]);
164         }
165     } else
166         put_bits(pb, 1, 0);
167 }
168
169 /**
170  * init s->current_picture.qscale_table from s->lambda_table
171  */
172 void ff_init_qscale_tab(MpegEncContext *s)
173 {
174     int8_t * const qscale_table = s->current_picture.qscale_table;
175     int i;
176
177     for (i = 0; i < s->mb_num; i++) {
178         unsigned int lam = s->lambda_table[s->mb_index2xy[i]];
179         int qp = (lam * 139 + FF_LAMBDA_SCALE * 64) >> (FF_LAMBDA_SHIFT + 7);
180         qscale_table[s->mb_index2xy[i]] = av_clip(qp, s->avctx->qmin,
181                                                   s->avctx->qmax);
182     }
183 }
184
185 static void update_duplicate_context_after_me(MpegEncContext *dst,
186                                               MpegEncContext *src)
187 {
188 #define COPY(a) dst->a= src->a
189     COPY(pict_type);
190     COPY(current_picture);
191     COPY(f_code);
192     COPY(b_code);
193     COPY(qscale);
194     COPY(lambda);
195     COPY(lambda2);
196     COPY(picture_in_gop_number);
197     COPY(gop_picture_number);
198     COPY(frame_pred_frame_dct); // FIXME don't set in encode_header
199     COPY(progressive_frame);    // FIXME don't set in encode_header
200     COPY(partitioned_frame);    // FIXME don't set in encode_header
201 #undef COPY
202 }
203
204 /**
205  * Set the given MpegEncContext to defaults for encoding.
206  * the changed fields will not depend upon the prior state of the MpegEncContext.
207  */
208 static void MPV_encode_defaults(MpegEncContext *s)
209 {
210     int i;
211     ff_MPV_common_defaults(s);
212
213     for (i = -16; i < 16; i++) {
214         default_fcode_tab[i + MAX_MV] = 1;
215     }
216     s->me.mv_penalty = default_mv_penalty;
217     s->fcode_tab     = default_fcode_tab;
218 }
219
220 /* init video encoder */
221 av_cold int ff_MPV_encode_init(AVCodecContext *avctx)
222 {
223     MpegEncContext *s = avctx->priv_data;
224     int i, ret;
225     int chroma_h_shift, chroma_v_shift;
226
227     MPV_encode_defaults(s);
228
229     switch (avctx->codec_id) {
230     case AV_CODEC_ID_MPEG2VIDEO:
231         if (avctx->pix_fmt != AV_PIX_FMT_YUV420P &&
232             avctx->pix_fmt != AV_PIX_FMT_YUV422P) {
233             av_log(avctx, AV_LOG_ERROR,
234                    "only YUV420 and YUV422 are supported\n");
235             return -1;
236         }
237         break;
238     case AV_CODEC_ID_LJPEG:
239         if (avctx->pix_fmt != AV_PIX_FMT_YUVJ420P &&
240             avctx->pix_fmt != AV_PIX_FMT_YUVJ422P &&
241             avctx->pix_fmt != AV_PIX_FMT_YUVJ444P &&
242             avctx->pix_fmt != AV_PIX_FMT_BGRA     &&
243             ((avctx->pix_fmt != AV_PIX_FMT_YUV420P &&
244               avctx->pix_fmt != AV_PIX_FMT_YUV422P &&
245               avctx->pix_fmt != AV_PIX_FMT_YUV444P) ||
246              avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL)) {
247             av_log(avctx, AV_LOG_ERROR, "colorspace not supported in LJPEG\n");
248             return -1;
249         }
250         break;
251     case AV_CODEC_ID_MJPEG:
252         if (avctx->pix_fmt != AV_PIX_FMT_YUVJ420P &&
253             avctx->pix_fmt != AV_PIX_FMT_YUVJ422P &&
254             ((avctx->pix_fmt != AV_PIX_FMT_YUV420P &&
255               avctx->pix_fmt != AV_PIX_FMT_YUV422P) ||
256              avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL)) {
257             av_log(avctx, AV_LOG_ERROR, "colorspace not supported in jpeg\n");
258             return -1;
259         }
260         break;
261     default:
262         if (avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
263             av_log(avctx, AV_LOG_ERROR, "only YUV420 is supported\n");
264             return -1;
265         }
266     }
267
268     switch (avctx->pix_fmt) {
269     case AV_PIX_FMT_YUVJ422P:
270     case AV_PIX_FMT_YUV422P:
271         s->chroma_format = CHROMA_422;
272         break;
273     case AV_PIX_FMT_YUVJ420P:
274     case AV_PIX_FMT_YUV420P:
275     default:
276         s->chroma_format = CHROMA_420;
277         break;
278     }
279
280     s->bit_rate = avctx->bit_rate;
281     s->width    = avctx->width;
282     s->height   = avctx->height;
283     if (avctx->gop_size > 600 &&
284         avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
285         av_log(avctx, AV_LOG_ERROR,
286                "Warning keyframe interval too large! reducing it ...\n");
287         avctx->gop_size = 600;
288     }
289     s->gop_size     = avctx->gop_size;
290     s->avctx        = avctx;
291     s->flags        = avctx->flags;
292     s->flags2       = avctx->flags2;
293     if (avctx->max_b_frames > MAX_B_FRAMES) {
294         av_log(avctx, AV_LOG_ERROR, "Too many B-frames requested, maximum "
295                "is %d.\n", MAX_B_FRAMES);
296     }
297     s->max_b_frames = avctx->max_b_frames;
298     s->codec_id     = avctx->codec->id;
299     s->strict_std_compliance = avctx->strict_std_compliance;
300     s->quarter_sample     = (avctx->flags & CODEC_FLAG_QPEL) != 0;
301     s->mpeg_quant         = avctx->mpeg_quant;
302     s->rtp_mode           = !!avctx->rtp_payload_size;
303     s->intra_dc_precision = avctx->intra_dc_precision;
304     s->user_specified_pts = AV_NOPTS_VALUE;
305
306     if (s->gop_size <= 1) {
307         s->intra_only = 1;
308         s->gop_size   = 12;
309     } else {
310         s->intra_only = 0;
311     }
312
313     s->me_method = avctx->me_method;
314
315     /* Fixed QSCALE */
316     s->fixed_qscale = !!(avctx->flags & CODEC_FLAG_QSCALE);
317
318     s->adaptive_quant = (s->avctx->lumi_masking ||
319                          s->avctx->dark_masking ||
320                          s->avctx->temporal_cplx_masking ||
321                          s->avctx->spatial_cplx_masking  ||
322                          s->avctx->p_masking      ||
323                          s->avctx->border_masking ||
324                          (s->mpv_flags & FF_MPV_FLAG_QP_RD)) &&
325                         !s->fixed_qscale;
326
327     s->loop_filter      = !!(s->flags & CODEC_FLAG_LOOP_FILTER);
328
329     if (avctx->rc_max_rate && !avctx->rc_buffer_size) {
330         av_log(avctx, AV_LOG_ERROR,
331                "a vbv buffer size is needed, "
332                "for encoding with a maximum bitrate\n");
333         return -1;
334     }
335
336     if (avctx->rc_min_rate && avctx->rc_max_rate != avctx->rc_min_rate) {
337         av_log(avctx, AV_LOG_INFO,
338                "Warning min_rate > 0 but min_rate != max_rate isn't recommended!\n");
339     }
340
341     if (avctx->rc_min_rate && avctx->rc_min_rate > avctx->bit_rate) {
342         av_log(avctx, AV_LOG_ERROR, "bitrate below min bitrate\n");
343         return -1;
344     }
345
346     if (avctx->rc_max_rate && avctx->rc_max_rate < avctx->bit_rate) {
347         av_log(avctx, AV_LOG_INFO, "bitrate above max bitrate\n");
348         return -1;
349     }
350
351     if (avctx->rc_max_rate &&
352         avctx->rc_max_rate == avctx->bit_rate &&
353         avctx->rc_max_rate != avctx->rc_min_rate) {
354         av_log(avctx, AV_LOG_INFO,
355                "impossible bitrate constraints, this will fail\n");
356     }
357
358     if (avctx->rc_buffer_size &&
359         avctx->bit_rate * (int64_t)avctx->time_base.num >
360             avctx->rc_buffer_size * (int64_t)avctx->time_base.den) {
361         av_log(avctx, AV_LOG_ERROR, "VBV buffer too small for bitrate\n");
362         return -1;
363     }
364
365     if (!s->fixed_qscale &&
366         avctx->bit_rate * av_q2d(avctx->time_base) >
367             avctx->bit_rate_tolerance) {
368         av_log(avctx, AV_LOG_ERROR,
369                "bitrate tolerance too small for bitrate\n");
370         return -1;
371     }
372
373     if (s->avctx->rc_max_rate &&
374         s->avctx->rc_min_rate == s->avctx->rc_max_rate &&
375         (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
376          s->codec_id == AV_CODEC_ID_MPEG2VIDEO) &&
377         90000LL * (avctx->rc_buffer_size - 1) >
378             s->avctx->rc_max_rate * 0xFFFFLL) {
379         av_log(avctx, AV_LOG_INFO,
380                "Warning vbv_delay will be set to 0xFFFF (=VBR) as the "
381                "specified vbv buffer is too large for the given bitrate!\n");
382     }
383
384     if ((s->flags & CODEC_FLAG_4MV)  && s->codec_id != AV_CODEC_ID_MPEG4 &&
385         s->codec_id != AV_CODEC_ID_H263 && s->codec_id != AV_CODEC_ID_H263P &&
386         s->codec_id != AV_CODEC_ID_FLV1) {
387         av_log(avctx, AV_LOG_ERROR, "4MV not supported by codec\n");
388         return -1;
389     }
390
391     if (s->obmc && s->avctx->mb_decision != FF_MB_DECISION_SIMPLE) {
392         av_log(avctx, AV_LOG_ERROR,
393                "OBMC is only supported with simple mb decision\n");
394         return -1;
395     }
396
397     if (s->quarter_sample && s->codec_id != AV_CODEC_ID_MPEG4) {
398         av_log(avctx, AV_LOG_ERROR, "qpel not supported by codec\n");
399         return -1;
400     }
401
402     if (s->max_b_frames                    &&
403         s->codec_id != AV_CODEC_ID_MPEG4      &&
404         s->codec_id != AV_CODEC_ID_MPEG1VIDEO &&
405         s->codec_id != AV_CODEC_ID_MPEG2VIDEO) {
406         av_log(avctx, AV_LOG_ERROR, "b frames not supported by codec\n");
407         return -1;
408     }
409
410     if ((s->codec_id == AV_CODEC_ID_MPEG4 ||
411          s->codec_id == AV_CODEC_ID_H263  ||
412          s->codec_id == AV_CODEC_ID_H263P) &&
413         (avctx->sample_aspect_ratio.num > 255 ||
414          avctx->sample_aspect_ratio.den > 255)) {
415         av_log(avctx, AV_LOG_ERROR,
416                "Invalid pixel aspect ratio %i/%i, limit is 255/255\n",
417                avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
418         return -1;
419     }
420
421     if ((s->flags & (CODEC_FLAG_INTERLACED_DCT | CODEC_FLAG_INTERLACED_ME)) &&
422         s->codec_id != AV_CODEC_ID_MPEG4 && s->codec_id != AV_CODEC_ID_MPEG2VIDEO) {
423         av_log(avctx, AV_LOG_ERROR, "interlacing not supported by codec\n");
424         return -1;
425     }
426
427     // FIXME mpeg2 uses that too
428     if (s->mpeg_quant && s->codec_id != AV_CODEC_ID_MPEG4) {
429         av_log(avctx, AV_LOG_ERROR,
430                "mpeg2 style quantization not supported by codec\n");
431         return -1;
432     }
433
434     if ((s->mpv_flags & FF_MPV_FLAG_CBP_RD) && !avctx->trellis) {
435         av_log(avctx, AV_LOG_ERROR, "CBP RD needs trellis quant\n");
436         return -1;
437     }
438
439     if ((s->mpv_flags & FF_MPV_FLAG_QP_RD) &&
440         s->avctx->mb_decision != FF_MB_DECISION_RD) {
441         av_log(avctx, AV_LOG_ERROR, "QP RD needs mbd=2\n");
442         return -1;
443     }
444
445     if (s->avctx->scenechange_threshold < 1000000000 &&
446         (s->flags & CODEC_FLAG_CLOSED_GOP)) {
447         av_log(avctx, AV_LOG_ERROR,
448                "closed gop with scene change detection are not supported yet, "
449                "set threshold to 1000000000\n");
450         return -1;
451     }
452
453     if (s->flags & CODEC_FLAG_LOW_DELAY) {
454         if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO) {
455             av_log(avctx, AV_LOG_ERROR,
456                   "low delay forcing is only available for mpeg2\n");
457             return -1;
458         }
459         if (s->max_b_frames != 0) {
460             av_log(avctx, AV_LOG_ERROR,
461                    "b frames cannot be used with low delay\n");
462             return -1;
463         }
464     }
465
466     if (s->q_scale_type == 1) {
467         if (avctx->qmax > 12) {
468             av_log(avctx, AV_LOG_ERROR,
469                    "non linear quant only supports qmax <= 12 currently\n");
470             return -1;
471         }
472     }
473
474     if (s->avctx->thread_count > 1         &&
475         s->codec_id != AV_CODEC_ID_MPEG4      &&
476         s->codec_id != AV_CODEC_ID_MPEG1VIDEO &&
477         s->codec_id != AV_CODEC_ID_MPEG2VIDEO &&
478         (s->codec_id != AV_CODEC_ID_H263P)) {
479         av_log(avctx, AV_LOG_ERROR,
480                "multi threaded encoding not supported by codec\n");
481         return -1;
482     }
483
484     if (s->avctx->thread_count < 1) {
485         av_log(avctx, AV_LOG_ERROR,
486                "automatic thread number detection not supported by codec,"
487                "patch welcome\n");
488         return -1;
489     }
490
491     if (s->avctx->thread_count > 1)
492         s->rtp_mode = 1;
493
494     if (!avctx->time_base.den || !avctx->time_base.num) {
495         av_log(avctx, AV_LOG_ERROR, "framerate not set\n");
496         return -1;
497     }
498
499     i = (INT_MAX / 2 + 128) >> 8;
500     if (avctx->mb_threshold >= i) {
501         av_log(avctx, AV_LOG_ERROR, "mb_threshold too large, max is %d\n",
502                i - 1);
503         return -1;
504     }
505
506     if (avctx->b_frame_strategy && (avctx->flags & CODEC_FLAG_PASS2)) {
507         av_log(avctx, AV_LOG_INFO,
508                "notice: b_frame_strategy only affects the first pass\n");
509         avctx->b_frame_strategy = 0;
510     }
511
512     i = av_gcd(avctx->time_base.den, avctx->time_base.num);
513     if (i > 1) {
514         av_log(avctx, AV_LOG_INFO, "removing common factors from framerate\n");
515         avctx->time_base.den /= i;
516         avctx->time_base.num /= i;
517         //return -1;
518     }
519
520     if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
521         s->codec_id == AV_CODEC_ID_MPEG2VIDEO || s->codec_id == AV_CODEC_ID_MJPEG) {
522         // (a + x * 3 / 8) / x
523         s->intra_quant_bias = 3 << (QUANT_BIAS_SHIFT - 3);
524         s->inter_quant_bias = 0;
525     } else {
526         s->intra_quant_bias = 0;
527         // (a - x / 4) / x
528         s->inter_quant_bias = -(1 << (QUANT_BIAS_SHIFT - 2));
529     }
530
531     if (avctx->intra_quant_bias != FF_DEFAULT_QUANT_BIAS)
532         s->intra_quant_bias = avctx->intra_quant_bias;
533     if (avctx->inter_quant_bias != FF_DEFAULT_QUANT_BIAS)
534         s->inter_quant_bias = avctx->inter_quant_bias;
535
536     av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
537                                      &chroma_v_shift);
538
539     if (avctx->codec_id == AV_CODEC_ID_MPEG4 &&
540         s->avctx->time_base.den > (1 << 16) - 1) {
541         av_log(avctx, AV_LOG_ERROR,
542                "timebase %d/%d not supported by MPEG 4 standard, "
543                "the maximum admitted value for the timebase denominator "
544                "is %d\n", s->avctx->time_base.num, s->avctx->time_base.den,
545                (1 << 16) - 1);
546         return -1;
547     }
548     s->time_increment_bits = av_log2(s->avctx->time_base.den - 1) + 1;
549
550     switch (avctx->codec->id) {
551     case AV_CODEC_ID_MPEG1VIDEO:
552         s->out_format = FMT_MPEG1;
553         s->low_delay  = !!(s->flags & CODEC_FLAG_LOW_DELAY);
554         avctx->delay  = s->low_delay ? 0 : (s->max_b_frames + 1);
555         break;
556     case AV_CODEC_ID_MPEG2VIDEO:
557         s->out_format = FMT_MPEG1;
558         s->low_delay  = !!(s->flags & CODEC_FLAG_LOW_DELAY);
559         avctx->delay  = s->low_delay ? 0 : (s->max_b_frames + 1);
560         s->rtp_mode   = 1;
561         break;
562     case AV_CODEC_ID_LJPEG:
563     case AV_CODEC_ID_MJPEG:
564         s->out_format = FMT_MJPEG;
565         s->intra_only = 1; /* force intra only for jpeg */
566         if (avctx->codec->id == AV_CODEC_ID_LJPEG &&
567             avctx->pix_fmt   == AV_PIX_FMT_BGRA) {
568             s->mjpeg_vsample[0] = s->mjpeg_hsample[0] =
569             s->mjpeg_vsample[1] = s->mjpeg_hsample[1] =
570             s->mjpeg_vsample[2] = s->mjpeg_hsample[2] = 1;
571         } else {
572             s->mjpeg_vsample[0] = 2;
573             s->mjpeg_vsample[1] = 2 >> chroma_v_shift;
574             s->mjpeg_vsample[2] = 2 >> chroma_v_shift;
575             s->mjpeg_hsample[0] = 2;
576             s->mjpeg_hsample[1] = 2 >> chroma_h_shift;
577             s->mjpeg_hsample[2] = 2 >> chroma_h_shift;
578         }
579         if (!(CONFIG_MJPEG_ENCODER || CONFIG_LJPEG_ENCODER) ||
580             ff_mjpeg_encode_init(s) < 0)
581             return -1;
582         avctx->delay = 0;
583         s->low_delay = 1;
584         break;
585     case AV_CODEC_ID_H261:
586         if (!CONFIG_H261_ENCODER)
587             return -1;
588         if (ff_h261_get_picture_format(s->width, s->height) < 0) {
589             av_log(avctx, AV_LOG_ERROR,
590                    "The specified picture size of %dx%d is not valid for the "
591                    "H.261 codec.\nValid sizes are 176x144, 352x288\n",
592                     s->width, s->height);
593             return -1;
594         }
595         s->out_format = FMT_H261;
596         avctx->delay  = 0;
597         s->low_delay  = 1;
598         break;
599     case AV_CODEC_ID_H263:
600         if (!CONFIG_H263_ENCODER)
601         return -1;
602         if (ff_match_2uint16(ff_h263_format, FF_ARRAY_ELEMS(ff_h263_format),
603                              s->width, s->height) == 8) {
604             av_log(avctx, AV_LOG_INFO,
605                    "The specified picture size of %dx%d is not valid for "
606                    "the H.263 codec.\nValid sizes are 128x96, 176x144, "
607                    "352x288, 704x576, and 1408x1152."
608                    "Try H.263+.\n", s->width, s->height);
609             return -1;
610         }
611         s->out_format = FMT_H263;
612         avctx->delay  = 0;
613         s->low_delay  = 1;
614         break;
615     case AV_CODEC_ID_H263P:
616         s->out_format = FMT_H263;
617         s->h263_plus  = 1;
618         /* Fx */
619         s->h263_aic        = (avctx->flags & CODEC_FLAG_AC_PRED) ? 1 : 0;
620         s->modified_quant  = s->h263_aic;
621         s->loop_filter     = (avctx->flags & CODEC_FLAG_LOOP_FILTER) ? 1 : 0;
622         s->unrestricted_mv = s->obmc || s->loop_filter || s->umvplus;
623
624         /* /Fx */
625         /* These are just to be sure */
626         avctx->delay = 0;
627         s->low_delay = 1;
628         break;
629     case AV_CODEC_ID_FLV1:
630         s->out_format      = FMT_H263;
631         s->h263_flv        = 2; /* format = 1; 11-bit codes */
632         s->unrestricted_mv = 1;
633         s->rtp_mode  = 0; /* don't allow GOB */
634         avctx->delay = 0;
635         s->low_delay = 1;
636         break;
637     case AV_CODEC_ID_RV10:
638         s->out_format = FMT_H263;
639         avctx->delay  = 0;
640         s->low_delay  = 1;
641         break;
642     case AV_CODEC_ID_RV20:
643         s->out_format      = FMT_H263;
644         avctx->delay       = 0;
645         s->low_delay       = 1;
646         s->modified_quant  = 1;
647         s->h263_aic        = 1;
648         s->h263_plus       = 1;
649         s->loop_filter     = 1;
650         s->unrestricted_mv = 0;
651         break;
652     case AV_CODEC_ID_MPEG4:
653         s->out_format      = FMT_H263;
654         s->h263_pred       = 1;
655         s->unrestricted_mv = 1;
656         s->low_delay       = s->max_b_frames ? 0 : 1;
657         avctx->delay       = s->low_delay ? 0 : (s->max_b_frames + 1);
658         break;
659     case AV_CODEC_ID_MSMPEG4V2:
660         s->out_format      = FMT_H263;
661         s->h263_pred       = 1;
662         s->unrestricted_mv = 1;
663         s->msmpeg4_version = 2;
664         avctx->delay       = 0;
665         s->low_delay       = 1;
666         break;
667     case AV_CODEC_ID_MSMPEG4V3:
668         s->out_format        = FMT_H263;
669         s->h263_pred         = 1;
670         s->unrestricted_mv   = 1;
671         s->msmpeg4_version   = 3;
672         s->flipflop_rounding = 1;
673         avctx->delay         = 0;
674         s->low_delay         = 1;
675         break;
676     case AV_CODEC_ID_WMV1:
677         s->out_format        = FMT_H263;
678         s->h263_pred         = 1;
679         s->unrestricted_mv   = 1;
680         s->msmpeg4_version   = 4;
681         s->flipflop_rounding = 1;
682         avctx->delay         = 0;
683         s->low_delay         = 1;
684         break;
685     case AV_CODEC_ID_WMV2:
686         s->out_format        = FMT_H263;
687         s->h263_pred         = 1;
688         s->unrestricted_mv   = 1;
689         s->msmpeg4_version   = 5;
690         s->flipflop_rounding = 1;
691         avctx->delay         = 0;
692         s->low_delay         = 1;
693         break;
694     default:
695         return -1;
696     }
697
698     avctx->has_b_frames = !s->low_delay;
699
700     s->encoding = 1;
701
702     s->progressive_frame    =
703     s->progressive_sequence = !(avctx->flags & (CODEC_FLAG_INTERLACED_DCT |
704                                                 CODEC_FLAG_INTERLACED_ME) ||
705                                 s->alternate_scan);
706
707     /* init */
708     if (ff_MPV_common_init(s) < 0)
709         return -1;
710
711     if (ARCH_X86)
712         ff_MPV_encode_init_x86(s);
713
714     ff_h263dsp_init(&s->h263dsp);
715     if (!s->dct_quantize)
716         s->dct_quantize = ff_dct_quantize_c;
717     if (!s->denoise_dct)
718         s->denoise_dct  = denoise_dct_c;
719     s->fast_dct_quantize = s->dct_quantize;
720     if (avctx->trellis)
721         s->dct_quantize  = dct_quantize_trellis_c;
722
723     if ((CONFIG_H263P_ENCODER || CONFIG_RV20_ENCODER) && s->modified_quant)
724         s->chroma_qscale_table = ff_h263_chroma_qscale_table;
725
726     s->quant_precision = 5;
727
728     ff_set_cmp(&s->dsp, s->dsp.ildct_cmp, s->avctx->ildct_cmp);
729     ff_set_cmp(&s->dsp, s->dsp.frame_skip_cmp, s->avctx->frame_skip_cmp);
730
731     if (CONFIG_H261_ENCODER && s->out_format == FMT_H261)
732         ff_h261_encode_init(s);
733     if (CONFIG_H263_ENCODER && s->out_format == FMT_H263)
734         ff_h263_encode_init(s);
735     if (CONFIG_MSMPEG4_ENCODER && s->msmpeg4_version)
736         ff_msmpeg4_encode_init(s);
737     if ((CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER)
738         && s->out_format == FMT_MPEG1)
739         ff_mpeg1_encode_init(s);
740
741     /* init q matrix */
742     for (i = 0; i < 64; i++) {
743         int j = s->dsp.idct_permutation[i];
744         if (CONFIG_MPEG4_ENCODER && s->codec_id == AV_CODEC_ID_MPEG4 &&
745             s->mpeg_quant) {
746             s->intra_matrix[j] = ff_mpeg4_default_intra_matrix[i];
747             s->inter_matrix[j] = ff_mpeg4_default_non_intra_matrix[i];
748         } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
749             s->intra_matrix[j] =
750             s->inter_matrix[j] = ff_mpeg1_default_non_intra_matrix[i];
751         } else {
752             /* mpeg1/2 */
753             s->intra_matrix[j] = ff_mpeg1_default_intra_matrix[i];
754             s->inter_matrix[j] = ff_mpeg1_default_non_intra_matrix[i];
755         }
756         if (s->avctx->intra_matrix)
757             s->intra_matrix[j] = s->avctx->intra_matrix[i];
758         if (s->avctx->inter_matrix)
759             s->inter_matrix[j] = s->avctx->inter_matrix[i];
760     }
761
762     /* precompute matrix */
763     /* for mjpeg, we do include qscale in the matrix */
764     if (s->out_format != FMT_MJPEG) {
765         ff_convert_matrix(&s->dsp, s->q_intra_matrix, s->q_intra_matrix16,
766                           s->intra_matrix, s->intra_quant_bias, avctx->qmin,
767                           31, 1);
768         ff_convert_matrix(&s->dsp, s->q_inter_matrix, s->q_inter_matrix16,
769                           s->inter_matrix, s->inter_quant_bias, avctx->qmin,
770                           31, 0);
771     }
772
773     if (ff_rate_control_init(s) < 0)
774         return -1;
775
776 #if FF_API_ERROR_RATE
777     FF_DISABLE_DEPRECATION_WARNINGS
778     if (avctx->error_rate)
779         s->error_rate = avctx->error_rate;
780     FF_ENABLE_DEPRECATION_WARNINGS;
781 #endif
782
783     if (avctx->b_frame_strategy == 2) {
784         for (i = 0; i < s->max_b_frames + 2; i++) {
785             s->tmp_frames[i] = av_frame_alloc();
786             if (!s->tmp_frames[i])
787                 return AVERROR(ENOMEM);
788
789             s->tmp_frames[i]->format = AV_PIX_FMT_YUV420P;
790             s->tmp_frames[i]->width  = s->width  >> avctx->brd_scale;
791             s->tmp_frames[i]->height = s->height >> avctx->brd_scale;
792
793             ret = av_frame_get_buffer(s->tmp_frames[i], 32);
794             if (ret < 0)
795                 return ret;
796         }
797     }
798
799     return 0;
800 }
801
802 av_cold int ff_MPV_encode_end(AVCodecContext *avctx)
803 {
804     MpegEncContext *s = avctx->priv_data;
805     int i;
806
807     ff_rate_control_uninit(s);
808
809     ff_MPV_common_end(s);
810     if ((CONFIG_MJPEG_ENCODER || CONFIG_LJPEG_ENCODER) &&
811         s->out_format == FMT_MJPEG)
812         ff_mjpeg_encode_close(s);
813
814     av_freep(&avctx->extradata);
815
816     for (i = 0; i < FF_ARRAY_ELEMS(s->tmp_frames); i++)
817         av_frame_free(&s->tmp_frames[i]);
818
819     return 0;
820 }
821
822 static int get_sae(uint8_t *src, int ref, int stride)
823 {
824     int x,y;
825     int acc = 0;
826
827     for (y = 0; y < 16; y++) {
828         for (x = 0; x < 16; x++) {
829             acc += FFABS(src[x + y * stride] - ref);
830         }
831     }
832
833     return acc;
834 }
835
836 static int get_intra_count(MpegEncContext *s, uint8_t *src,
837                            uint8_t *ref, int stride)
838 {
839     int x, y, w, h;
840     int acc = 0;
841
842     w = s->width  & ~15;
843     h = s->height & ~15;
844
845     for (y = 0; y < h; y += 16) {
846         for (x = 0; x < w; x += 16) {
847             int offset = x + y * stride;
848             int sad  = s->dsp.sad[0](NULL, src + offset, ref + offset, stride,
849                                      16);
850             int mean = (s->dsp.pix_sum(src + offset, stride) + 128) >> 8;
851             int sae  = get_sae(src + offset, mean, stride);
852
853             acc += sae + 500 < sad;
854         }
855     }
856     return acc;
857 }
858
859
860 static int load_input_picture(MpegEncContext *s, const AVFrame *pic_arg)
861 {
862     Picture *pic = NULL;
863     int64_t pts;
864     int i, display_picture_number = 0, ret;
865     const int encoding_delay = s->max_b_frames ? s->max_b_frames :
866                                                  (s->low_delay ? 0 : 1);
867     int direct = 1;
868
869     if (pic_arg) {
870         pts = pic_arg->pts;
871         display_picture_number = s->input_picture_number++;
872
873         if (pts != AV_NOPTS_VALUE) {
874             if (s->user_specified_pts != AV_NOPTS_VALUE) {
875                 int64_t time = pts;
876                 int64_t last = s->user_specified_pts;
877
878                 if (time <= last) {
879                     av_log(s->avctx, AV_LOG_ERROR,
880                            "Error, Invalid timestamp=%"PRId64", "
881                            "last=%"PRId64"\n", pts, s->user_specified_pts);
882                     return -1;
883                 }
884
885                 if (!s->low_delay && display_picture_number == 1)
886                     s->dts_delta = time - last;
887             }
888             s->user_specified_pts = pts;
889         } else {
890             if (s->user_specified_pts != AV_NOPTS_VALUE) {
891                 s->user_specified_pts =
892                 pts = s->user_specified_pts + 1;
893                 av_log(s->avctx, AV_LOG_INFO,
894                        "Warning: AVFrame.pts=? trying to guess (%"PRId64")\n",
895                        pts);
896             } else {
897                 pts = display_picture_number;
898             }
899         }
900     }
901
902     if (pic_arg) {
903         if (!pic_arg->buf[0]);
904             direct = 0;
905         if (pic_arg->linesize[0] != s->linesize)
906             direct = 0;
907         if (pic_arg->linesize[1] != s->uvlinesize)
908             direct = 0;
909         if (pic_arg->linesize[2] != s->uvlinesize)
910             direct = 0;
911
912         av_dlog(s->avctx, "%d %d %td %td\n", pic_arg->linesize[0],
913                 pic_arg->linesize[1], s->linesize, s->uvlinesize);
914
915         if (direct) {
916             i = ff_find_unused_picture(s, 1);
917             if (i < 0)
918                 return i;
919
920             pic = &s->picture[i];
921             pic->reference = 3;
922
923             if ((ret = av_frame_ref(&pic->f, pic_arg)) < 0)
924                 return ret;
925             if (ff_alloc_picture(s, pic, 1) < 0) {
926                 return -1;
927             }
928         } else {
929             i = ff_find_unused_picture(s, 0);
930             if (i < 0)
931                 return i;
932
933             pic = &s->picture[i];
934             pic->reference = 3;
935
936             if (ff_alloc_picture(s, pic, 0) < 0) {
937                 return -1;
938             }
939
940             if (pic->f.data[0] + INPLACE_OFFSET == pic_arg->data[0] &&
941                 pic->f.data[1] + INPLACE_OFFSET == pic_arg->data[1] &&
942                 pic->f.data[2] + INPLACE_OFFSET == pic_arg->data[2]) {
943                 // empty
944             } else {
945                 int h_chroma_shift, v_chroma_shift;
946                 av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
947                                                  &h_chroma_shift,
948                                                  &v_chroma_shift);
949
950                 for (i = 0; i < 3; i++) {
951                     int src_stride = pic_arg->linesize[i];
952                     int dst_stride = i ? s->uvlinesize : s->linesize;
953                     int h_shift = i ? h_chroma_shift : 0;
954                     int v_shift = i ? v_chroma_shift : 0;
955                     int w = s->width  >> h_shift;
956                     int h = s->height >> v_shift;
957                     uint8_t *src = pic_arg->data[i];
958                     uint8_t *dst = pic->f.data[i];
959
960                     if (!s->avctx->rc_buffer_size)
961                         dst += INPLACE_OFFSET;
962
963                     if (src_stride == dst_stride)
964                         memcpy(dst, src, src_stride * h);
965                     else {
966                         while (h--) {
967                             memcpy(dst, src, w);
968                             dst += dst_stride;
969                             src += src_stride;
970                         }
971                     }
972                 }
973             }
974         }
975         ret = av_frame_copy_props(&pic->f, pic_arg);
976         if (ret < 0)
977             return ret;
978
979         pic->f.display_picture_number = display_picture_number;
980         pic->f.pts = pts; // we set this here to avoid modifiying pic_arg
981     }
982
983     /* shift buffer entries */
984     for (i = 1; i < MAX_PICTURE_COUNT /*s->encoding_delay + 1*/; i++)
985         s->input_picture[i - 1] = s->input_picture[i];
986
987     s->input_picture[encoding_delay] = (Picture*) pic;
988
989     return 0;
990 }
991
992 static int skip_check(MpegEncContext *s, Picture *p, Picture *ref)
993 {
994     int x, y, plane;
995     int score = 0;
996     int64_t score64 = 0;
997
998     for (plane = 0; plane < 3; plane++) {
999         const int stride = p->f.linesize[plane];
1000         const int bw = plane ? 1 : 2;
1001         for (y = 0; y < s->mb_height * bw; y++) {
1002             for (x = 0; x < s->mb_width * bw; x++) {
1003                 int off = p->shared ? 0 : 16;
1004                 uint8_t *dptr = p->f.data[plane] + 8 * (x + y * stride) + off;
1005                 uint8_t *rptr = ref->f.data[plane] + 8 * (x + y * stride);
1006                 int v   = s->dsp.frame_skip_cmp[1](s, dptr, rptr, stride, 8);
1007
1008                 switch (s->avctx->frame_skip_exp) {
1009                 case 0: score    =  FFMAX(score, v);          break;
1010                 case 1: score   += FFABS(v);                  break;
1011                 case 2: score   += v * v;                     break;
1012                 case 3: score64 += FFABS(v * v * (int64_t)v); break;
1013                 case 4: score64 += v * v * (int64_t)(v * v);  break;
1014                 }
1015             }
1016         }
1017     }
1018
1019     if (score)
1020         score64 = score;
1021
1022     if (score64 < s->avctx->frame_skip_threshold)
1023         return 1;
1024     if (score64 < ((s->avctx->frame_skip_factor * (int64_t)s->lambda) >> 8))
1025         return 1;
1026     return 0;
1027 }
1028
1029 static int encode_frame(AVCodecContext *c, AVFrame *frame)
1030 {
1031     AVPacket pkt = { 0 };
1032     int ret, got_output;
1033
1034     av_init_packet(&pkt);
1035     ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
1036     if (ret < 0)
1037         return ret;
1038
1039     ret = pkt.size;
1040     av_free_packet(&pkt);
1041     return ret;
1042 }
1043
1044 static int estimate_best_b_count(MpegEncContext *s)
1045 {
1046     AVCodec *codec    = avcodec_find_encoder(s->avctx->codec_id);
1047     AVCodecContext *c = avcodec_alloc_context3(NULL);
1048     const int scale = s->avctx->brd_scale;
1049     int i, j, out_size, p_lambda, b_lambda, lambda2;
1050     int64_t best_rd  = INT64_MAX;
1051     int best_b_count = -1;
1052
1053     assert(scale >= 0 && scale <= 3);
1054
1055     //emms_c();
1056     //s->next_picture_ptr->quality;
1057     p_lambda = s->last_lambda_for[AV_PICTURE_TYPE_P];
1058     //p_lambda * FFABS(s->avctx->b_quant_factor) + s->avctx->b_quant_offset;
1059     b_lambda = s->last_lambda_for[AV_PICTURE_TYPE_B];
1060     if (!b_lambda) // FIXME we should do this somewhere else
1061         b_lambda = p_lambda;
1062     lambda2  = (b_lambda * b_lambda + (1 << FF_LAMBDA_SHIFT) / 2) >>
1063                FF_LAMBDA_SHIFT;
1064
1065     c->width        = s->width  >> scale;
1066     c->height       = s->height >> scale;
1067     c->flags        = CODEC_FLAG_QSCALE | CODEC_FLAG_PSNR |
1068                       CODEC_FLAG_INPUT_PRESERVED /*| CODEC_FLAG_EMU_EDGE*/;
1069     c->flags       |= s->avctx->flags & CODEC_FLAG_QPEL;
1070     c->mb_decision  = s->avctx->mb_decision;
1071     c->me_cmp       = s->avctx->me_cmp;
1072     c->mb_cmp       = s->avctx->mb_cmp;
1073     c->me_sub_cmp   = s->avctx->me_sub_cmp;
1074     c->pix_fmt      = AV_PIX_FMT_YUV420P;
1075     c->time_base    = s->avctx->time_base;
1076     c->max_b_frames = s->max_b_frames;
1077
1078     if (avcodec_open2(c, codec, NULL) < 0)
1079         return -1;
1080
1081     for (i = 0; i < s->max_b_frames + 2; i++) {
1082         Picture pre_input, *pre_input_ptr = i ? s->input_picture[i - 1] :
1083                                                 s->next_picture_ptr;
1084
1085         if (pre_input_ptr && (!i || s->input_picture[i - 1])) {
1086             pre_input = *pre_input_ptr;
1087
1088             if (!pre_input.shared && i) {
1089                 pre_input.f.data[0] += INPLACE_OFFSET;
1090                 pre_input.f.data[1] += INPLACE_OFFSET;
1091                 pre_input.f.data[2] += INPLACE_OFFSET;
1092             }
1093
1094             s->dsp.shrink[scale](s->tmp_frames[i]->data[0], s->tmp_frames[i]->linesize[0],
1095                                  pre_input.f.data[0], pre_input.f.linesize[0],
1096                                  c->width,      c->height);
1097             s->dsp.shrink[scale](s->tmp_frames[i]->data[1], s->tmp_frames[i]->linesize[1],
1098                                  pre_input.f.data[1], pre_input.f.linesize[1],
1099                                  c->width >> 1, c->height >> 1);
1100             s->dsp.shrink[scale](s->tmp_frames[i]->data[2], s->tmp_frames[i]->linesize[2],
1101                                  pre_input.f.data[2], pre_input.f.linesize[2],
1102                                  c->width >> 1, c->height >> 1);
1103         }
1104     }
1105
1106     for (j = 0; j < s->max_b_frames + 1; j++) {
1107         int64_t rd = 0;
1108
1109         if (!s->input_picture[j])
1110             break;
1111
1112         c->error[0] = c->error[1] = c->error[2] = 0;
1113
1114         s->tmp_frames[0]->pict_type = AV_PICTURE_TYPE_I;
1115         s->tmp_frames[0]->quality   = 1 * FF_QP2LAMBDA;
1116
1117         out_size = encode_frame(c, s->tmp_frames[0]);
1118
1119         //rd += (out_size * lambda2) >> FF_LAMBDA_SHIFT;
1120
1121         for (i = 0; i < s->max_b_frames + 1; i++) {
1122             int is_p = i % (j + 1) == j || i == s->max_b_frames;
1123
1124             s->tmp_frames[i + 1]->pict_type = is_p ?
1125                                      AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_B;
1126             s->tmp_frames[i + 1]->quality   = is_p ? p_lambda : b_lambda;
1127
1128             out_size = encode_frame(c, s->tmp_frames[i + 1]);
1129
1130             rd += (out_size * lambda2) >> (FF_LAMBDA_SHIFT - 3);
1131         }
1132
1133         /* get the delayed frames */
1134         while (out_size) {
1135             out_size = encode_frame(c, NULL);
1136             rd += (out_size * lambda2) >> (FF_LAMBDA_SHIFT - 3);
1137         }
1138
1139         rd += c->error[0] + c->error[1] + c->error[2];
1140
1141         if (rd < best_rd) {
1142             best_rd = rd;
1143             best_b_count = j;
1144         }
1145     }
1146
1147     avcodec_close(c);
1148     av_freep(&c);
1149
1150     return best_b_count;
1151 }
1152
1153 static int select_input_picture(MpegEncContext *s)
1154 {
1155     int i, ret;
1156
1157     for (i = 1; i < MAX_PICTURE_COUNT; i++)
1158         s->reordered_input_picture[i - 1] = s->reordered_input_picture[i];
1159     s->reordered_input_picture[MAX_PICTURE_COUNT - 1] = NULL;
1160
1161     /* set next picture type & ordering */
1162     if (s->reordered_input_picture[0] == NULL && s->input_picture[0]) {
1163         if (/*s->picture_in_gop_number >= s->gop_size ||*/
1164             s->next_picture_ptr == NULL || s->intra_only) {
1165             s->reordered_input_picture[0] = s->input_picture[0];
1166             s->reordered_input_picture[0]->f.pict_type = AV_PICTURE_TYPE_I;
1167             s->reordered_input_picture[0]->f.coded_picture_number =
1168                 s->coded_picture_number++;
1169         } else {
1170             int b_frames;
1171
1172             if (s->avctx->frame_skip_threshold || s->avctx->frame_skip_factor) {
1173                 if (s->picture_in_gop_number < s->gop_size &&
1174                     skip_check(s, s->input_picture[0], s->next_picture_ptr)) {
1175                     // FIXME check that te gop check above is +-1 correct
1176                     av_frame_unref(&s->input_picture[0]->f);
1177
1178                     emms_c();
1179                     ff_vbv_update(s, 0);
1180
1181                     goto no_output_pic;
1182                 }
1183             }
1184
1185             if (s->flags & CODEC_FLAG_PASS2) {
1186                 for (i = 0; i < s->max_b_frames + 1; i++) {
1187                     int pict_num = s->input_picture[0]->f.display_picture_number + i;
1188
1189                     if (pict_num >= s->rc_context.num_entries)
1190                         break;
1191                     if (!s->input_picture[i]) {
1192                         s->rc_context.entry[pict_num - 1].new_pict_type = AV_PICTURE_TYPE_P;
1193                         break;
1194                     }
1195
1196                     s->input_picture[i]->f.pict_type =
1197                         s->rc_context.entry[pict_num].new_pict_type;
1198                 }
1199             }
1200
1201             if (s->avctx->b_frame_strategy == 0) {
1202                 b_frames = s->max_b_frames;
1203                 while (b_frames && !s->input_picture[b_frames])
1204                     b_frames--;
1205             } else if (s->avctx->b_frame_strategy == 1) {
1206                 for (i = 1; i < s->max_b_frames + 1; i++) {
1207                     if (s->input_picture[i] &&
1208                         s->input_picture[i]->b_frame_score == 0) {
1209                         s->input_picture[i]->b_frame_score =
1210                             get_intra_count(s,
1211                                             s->input_picture[i    ]->f.data[0],
1212                                             s->input_picture[i - 1]->f.data[0],
1213                                             s->linesize) + 1;
1214                     }
1215                 }
1216                 for (i = 0; i < s->max_b_frames + 1; i++) {
1217                     if (s->input_picture[i] == NULL ||
1218                         s->input_picture[i]->b_frame_score - 1 >
1219                             s->mb_num / s->avctx->b_sensitivity)
1220                         break;
1221                 }
1222
1223                 b_frames = FFMAX(0, i - 1);
1224
1225                 /* reset scores */
1226                 for (i = 0; i < b_frames + 1; i++) {
1227                     s->input_picture[i]->b_frame_score = 0;
1228                 }
1229             } else if (s->avctx->b_frame_strategy == 2) {
1230                 b_frames = estimate_best_b_count(s);
1231             } else {
1232                 av_log(s->avctx, AV_LOG_ERROR, "illegal b frame strategy\n");
1233                 b_frames = 0;
1234             }
1235
1236             emms_c();
1237
1238             for (i = b_frames - 1; i >= 0; i--) {
1239                 int type = s->input_picture[i]->f.pict_type;
1240                 if (type && type != AV_PICTURE_TYPE_B)
1241                     b_frames = i;
1242             }
1243             if (s->input_picture[b_frames]->f.pict_type == AV_PICTURE_TYPE_B &&
1244                 b_frames == s->max_b_frames) {
1245                 av_log(s->avctx, AV_LOG_ERROR,
1246                        "warning, too many b frames in a row\n");
1247             }
1248
1249             if (s->picture_in_gop_number + b_frames >= s->gop_size) {
1250                 if ((s->mpv_flags & FF_MPV_FLAG_STRICT_GOP) &&
1251                     s->gop_size > s->picture_in_gop_number) {
1252                     b_frames = s->gop_size - s->picture_in_gop_number - 1;
1253                 } else {
1254                     if (s->flags & CODEC_FLAG_CLOSED_GOP)
1255                         b_frames = 0;
1256                     s->input_picture[b_frames]->f.pict_type = AV_PICTURE_TYPE_I;
1257                 }
1258             }
1259
1260             if ((s->flags & CODEC_FLAG_CLOSED_GOP) && b_frames &&
1261                 s->input_picture[b_frames]->f.pict_type == AV_PICTURE_TYPE_I)
1262                 b_frames--;
1263
1264             s->reordered_input_picture[0] = s->input_picture[b_frames];
1265             if (s->reordered_input_picture[0]->f.pict_type != AV_PICTURE_TYPE_I)
1266                 s->reordered_input_picture[0]->f.pict_type = AV_PICTURE_TYPE_P;
1267             s->reordered_input_picture[0]->f.coded_picture_number =
1268                 s->coded_picture_number++;
1269             for (i = 0; i < b_frames; i++) {
1270                 s->reordered_input_picture[i + 1] = s->input_picture[i];
1271                 s->reordered_input_picture[i + 1]->f.pict_type =
1272                     AV_PICTURE_TYPE_B;
1273                 s->reordered_input_picture[i + 1]->f.coded_picture_number =
1274                     s->coded_picture_number++;
1275             }
1276         }
1277     }
1278 no_output_pic:
1279     if (s->reordered_input_picture[0]) {
1280         s->reordered_input_picture[0]->reference =
1281            s->reordered_input_picture[0]->f.pict_type !=
1282                AV_PICTURE_TYPE_B ? 3 : 0;
1283
1284         ff_mpeg_unref_picture(s, &s->new_picture);
1285         if ((ret = ff_mpeg_ref_picture(s, &s->new_picture, s->reordered_input_picture[0])))
1286             return ret;
1287
1288         if (s->reordered_input_picture[0]->shared || s->avctx->rc_buffer_size) {
1289             // input is a shared pix, so we can't modifiy it -> alloc a new
1290             // one & ensure that the shared one is reuseable
1291
1292             Picture *pic;
1293             int i = ff_find_unused_picture(s, 0);
1294             if (i < 0)
1295                 return i;
1296             pic = &s->picture[i];
1297
1298             pic->reference = s->reordered_input_picture[0]->reference;
1299             if (ff_alloc_picture(s, pic, 0) < 0) {
1300                 return -1;
1301             }
1302
1303             ret = av_frame_copy_props(&pic->f, &s->reordered_input_picture[0]->f);
1304             if (ret < 0)
1305                 return ret;
1306
1307             /* mark us unused / free shared pic */
1308             av_frame_unref(&s->reordered_input_picture[0]->f);
1309             s->reordered_input_picture[0]->shared = 0;
1310
1311             s->current_picture_ptr = pic;
1312         } else {
1313             // input is not a shared pix -> reuse buffer for current_pix
1314             s->current_picture_ptr = s->reordered_input_picture[0];
1315             for (i = 0; i < 4; i++) {
1316                 s->new_picture.f.data[i] += INPLACE_OFFSET;
1317             }
1318         }
1319         ff_mpeg_unref_picture(s, &s->current_picture);
1320         if ((ret = ff_mpeg_ref_picture(s, &s->current_picture,
1321                                        s->current_picture_ptr)) < 0)
1322             return ret;
1323
1324         s->picture_number = s->new_picture.f.display_picture_number;
1325     } else {
1326         ff_mpeg_unref_picture(s, &s->new_picture);
1327     }
1328     return 0;
1329 }
1330
1331 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
1332                           const AVFrame *pic_arg, int *got_packet)
1333 {
1334     MpegEncContext *s = avctx->priv_data;
1335     int i, stuffing_count, ret;
1336     int context_count = s->slice_context_count;
1337
1338     s->picture_in_gop_number++;
1339
1340     if (load_input_picture(s, pic_arg) < 0)
1341         return -1;
1342
1343     if (select_input_picture(s) < 0) {
1344         return -1;
1345     }
1346
1347     /* output? */
1348     if (s->new_picture.f.data[0]) {
1349         if (!pkt->data &&
1350             (ret = ff_alloc_packet(pkt, s->mb_width*s->mb_height*MAX_MB_BYTES)) < 0)
1351             return ret;
1352         if (s->mb_info) {
1353             s->mb_info_ptr = av_packet_new_side_data(pkt,
1354                                  AV_PKT_DATA_H263_MB_INFO,
1355                                  s->mb_width*s->mb_height*12);
1356             s->prev_mb_info = s->last_mb_info = s->mb_info_size = 0;
1357         }
1358
1359         for (i = 0; i < context_count; i++) {
1360             int start_y = s->thread_context[i]->start_mb_y;
1361             int   end_y = s->thread_context[i]->  end_mb_y;
1362             int h       = s->mb_height;
1363             uint8_t *start = pkt->data + (size_t)(((int64_t) pkt->size) * start_y / h);
1364             uint8_t *end   = pkt->data + (size_t)(((int64_t) pkt->size) *   end_y / h);
1365
1366             init_put_bits(&s->thread_context[i]->pb, start, end - start);
1367         }
1368
1369         s->pict_type = s->new_picture.f.pict_type;
1370         //emms_c();
1371         ff_MPV_frame_start(s, avctx);
1372 vbv_retry:
1373         if (encode_picture(s, s->picture_number) < 0)
1374             return -1;
1375
1376         avctx->header_bits = s->header_bits;
1377         avctx->mv_bits     = s->mv_bits;
1378         avctx->misc_bits   = s->misc_bits;
1379         avctx->i_tex_bits  = s->i_tex_bits;
1380         avctx->p_tex_bits  = s->p_tex_bits;
1381         avctx->i_count     = s->i_count;
1382         // FIXME f/b_count in avctx
1383         avctx->p_count     = s->mb_num - s->i_count - s->skip_count;
1384         avctx->skip_count  = s->skip_count;
1385
1386         ff_MPV_frame_end(s);
1387
1388         if (CONFIG_MJPEG_ENCODER && s->out_format == FMT_MJPEG)
1389             ff_mjpeg_encode_picture_trailer(s);
1390
1391         if (avctx->rc_buffer_size) {
1392             RateControlContext *rcc = &s->rc_context;
1393             int max_size = rcc->buffer_index * avctx->rc_max_available_vbv_use;
1394
1395             if (put_bits_count(&s->pb) > max_size &&
1396                 s->lambda < s->avctx->lmax) {
1397                 s->next_lambda = FFMAX(s->lambda + 1, s->lambda *
1398                                        (s->qscale + 1) / s->qscale);
1399                 if (s->adaptive_quant) {
1400                     int i;
1401                     for (i = 0; i < s->mb_height * s->mb_stride; i++)
1402                         s->lambda_table[i] =
1403                             FFMAX(s->lambda_table[i] + 1,
1404                                   s->lambda_table[i] * (s->qscale + 1) /
1405                                   s->qscale);
1406                 }
1407                 s->mb_skipped = 0;        // done in MPV_frame_start()
1408                 // done in encode_picture() so we must undo it
1409                 if (s->pict_type == AV_PICTURE_TYPE_P) {
1410                     if (s->flipflop_rounding          ||
1411                         s->codec_id == AV_CODEC_ID_H263P ||
1412                         s->codec_id == AV_CODEC_ID_MPEG4)
1413                         s->no_rounding ^= 1;
1414                 }
1415                 if (s->pict_type != AV_PICTURE_TYPE_B) {
1416                     s->time_base       = s->last_time_base;
1417                     s->last_non_b_time = s->time - s->pp_time;
1418                 }
1419                 for (i = 0; i < context_count; i++) {
1420                     PutBitContext *pb = &s->thread_context[i]->pb;
1421                     init_put_bits(pb, pb->buf, pb->buf_end - pb->buf);
1422                 }
1423                 goto vbv_retry;
1424             }
1425
1426             assert(s->avctx->rc_max_rate);
1427         }
1428
1429         if (s->flags & CODEC_FLAG_PASS1)
1430             ff_write_pass1_stats(s);
1431
1432         for (i = 0; i < 4; i++) {
1433             s->current_picture_ptr->f.error[i] = s->current_picture.f.error[i];
1434             avctx->error[i] += s->current_picture_ptr->f.error[i];
1435         }
1436
1437         if (s->flags & CODEC_FLAG_PASS1)
1438             assert(avctx->header_bits + avctx->mv_bits + avctx->misc_bits +
1439                    avctx->i_tex_bits + avctx->p_tex_bits ==
1440                        put_bits_count(&s->pb));
1441         flush_put_bits(&s->pb);
1442         s->frame_bits  = put_bits_count(&s->pb);
1443
1444         stuffing_count = ff_vbv_update(s, s->frame_bits);
1445         if (stuffing_count) {
1446             if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) <
1447                     stuffing_count + 50) {
1448                 av_log(s->avctx, AV_LOG_ERROR, "stuffing too large\n");
1449                 return -1;
1450             }
1451
1452             switch (s->codec_id) {
1453             case AV_CODEC_ID_MPEG1VIDEO:
1454             case AV_CODEC_ID_MPEG2VIDEO:
1455                 while (stuffing_count--) {
1456                     put_bits(&s->pb, 8, 0);
1457                 }
1458             break;
1459             case AV_CODEC_ID_MPEG4:
1460                 put_bits(&s->pb, 16, 0);
1461                 put_bits(&s->pb, 16, 0x1C3);
1462                 stuffing_count -= 4;
1463                 while (stuffing_count--) {
1464                     put_bits(&s->pb, 8, 0xFF);
1465                 }
1466             break;
1467             default:
1468                 av_log(s->avctx, AV_LOG_ERROR, "vbv buffer overflow\n");
1469             }
1470             flush_put_bits(&s->pb);
1471             s->frame_bits  = put_bits_count(&s->pb);
1472         }
1473
1474         /* update mpeg1/2 vbv_delay for CBR */
1475         if (s->avctx->rc_max_rate                          &&
1476             s->avctx->rc_min_rate == s->avctx->rc_max_rate &&
1477             s->out_format == FMT_MPEG1                     &&
1478             90000LL * (avctx->rc_buffer_size - 1) <=
1479                 s->avctx->rc_max_rate * 0xFFFFLL) {
1480             int vbv_delay, min_delay;
1481             double inbits  = s->avctx->rc_max_rate *
1482                              av_q2d(s->avctx->time_base);
1483             int    minbits = s->frame_bits - 8 *
1484                              (s->vbv_delay_ptr - s->pb.buf - 1);
1485             double bits    = s->rc_context.buffer_index + minbits - inbits;
1486
1487             if (bits < 0)
1488                 av_log(s->avctx, AV_LOG_ERROR,
1489                        "Internal error, negative bits\n");
1490
1491             assert(s->repeat_first_field == 0);
1492
1493             vbv_delay = bits * 90000 / s->avctx->rc_max_rate;
1494             min_delay = (minbits * 90000LL + s->avctx->rc_max_rate - 1) /
1495                         s->avctx->rc_max_rate;
1496
1497             vbv_delay = FFMAX(vbv_delay, min_delay);
1498
1499             assert(vbv_delay < 0xFFFF);
1500
1501             s->vbv_delay_ptr[0] &= 0xF8;
1502             s->vbv_delay_ptr[0] |= vbv_delay >> 13;
1503             s->vbv_delay_ptr[1]  = vbv_delay >> 5;
1504             s->vbv_delay_ptr[2] &= 0x07;
1505             s->vbv_delay_ptr[2] |= vbv_delay << 3;
1506             avctx->vbv_delay     = vbv_delay * 300;
1507         }
1508         s->total_bits     += s->frame_bits;
1509         avctx->frame_bits  = s->frame_bits;
1510
1511         pkt->pts = s->current_picture.f.pts;
1512         if (!s->low_delay) {
1513             if (!s->current_picture.f.coded_picture_number)
1514                 pkt->dts = pkt->pts - s->dts_delta;
1515             else
1516                 pkt->dts = s->reordered_pts;
1517             s->reordered_pts = s->input_picture[0]->f.pts;
1518         } else
1519             pkt->dts = pkt->pts;
1520         if (s->current_picture.f.key_frame)
1521             pkt->flags |= AV_PKT_FLAG_KEY;
1522         if (s->mb_info)
1523             av_packet_shrink_side_data(pkt, AV_PKT_DATA_H263_MB_INFO, s->mb_info_size);
1524     } else {
1525         s->frame_bits = 0;
1526     }
1527     assert((s->frame_bits & 7) == 0);
1528
1529     pkt->size = s->frame_bits / 8;
1530     *got_packet = !!pkt->size;
1531     return 0;
1532 }
1533
1534 static inline void dct_single_coeff_elimination(MpegEncContext *s,
1535                                                 int n, int threshold)
1536 {
1537     static const char tab[64] = {
1538         3, 2, 2, 1, 1, 1, 1, 1,
1539         1, 1, 1, 1, 1, 1, 1, 1,
1540         1, 1, 1, 1, 1, 1, 1, 1,
1541         0, 0, 0, 0, 0, 0, 0, 0,
1542         0, 0, 0, 0, 0, 0, 0, 0,
1543         0, 0, 0, 0, 0, 0, 0, 0,
1544         0, 0, 0, 0, 0, 0, 0, 0,
1545         0, 0, 0, 0, 0, 0, 0, 0
1546     };
1547     int score = 0;
1548     int run = 0;
1549     int i;
1550     int16_t *block = s->block[n];
1551     const int last_index = s->block_last_index[n];
1552     int skip_dc;
1553
1554     if (threshold < 0) {
1555         skip_dc = 0;
1556         threshold = -threshold;
1557     } else
1558         skip_dc = 1;
1559
1560     /* Are all we could set to zero already zero? */
1561     if (last_index <= skip_dc - 1)
1562         return;
1563
1564     for (i = 0; i <= last_index; i++) {
1565         const int j = s->intra_scantable.permutated[i];
1566         const int level = FFABS(block[j]);
1567         if (level == 1) {
1568             if (skip_dc && i == 0)
1569                 continue;
1570             score += tab[run];
1571             run = 0;
1572         } else if (level > 1) {
1573             return;
1574         } else {
1575             run++;
1576         }
1577     }
1578     if (score >= threshold)
1579         return;
1580     for (i = skip_dc; i <= last_index; i++) {
1581         const int j = s->intra_scantable.permutated[i];
1582         block[j] = 0;
1583     }
1584     if (block[0])
1585         s->block_last_index[n] = 0;
1586     else
1587         s->block_last_index[n] = -1;
1588 }
1589
1590 static inline void clip_coeffs(MpegEncContext *s, int16_t *block,
1591                                int last_index)
1592 {
1593     int i;
1594     const int maxlevel = s->max_qcoeff;
1595     const int minlevel = s->min_qcoeff;
1596     int overflow = 0;
1597
1598     if (s->mb_intra) {
1599         i = 1; // skip clipping of intra dc
1600     } else
1601         i = 0;
1602
1603     for (; i <= last_index; i++) {
1604         const int j = s->intra_scantable.permutated[i];
1605         int level = block[j];
1606
1607         if (level > maxlevel) {
1608             level = maxlevel;
1609             overflow++;
1610         } else if (level < minlevel) {
1611             level = minlevel;
1612             overflow++;
1613         }
1614
1615         block[j] = level;
1616     }
1617
1618     if (overflow && s->avctx->mb_decision == FF_MB_DECISION_SIMPLE)
1619         av_log(s->avctx, AV_LOG_INFO,
1620                "warning, clipping %d dct coefficients to %d..%d\n",
1621                overflow, minlevel, maxlevel);
1622 }
1623
1624 static void get_visual_weight(int16_t *weight, uint8_t *ptr, int stride)
1625 {
1626     int x, y;
1627     // FIXME optimize
1628     for (y = 0; y < 8; y++) {
1629         for (x = 0; x < 8; x++) {
1630             int x2, y2;
1631             int sum = 0;
1632             int sqr = 0;
1633             int count = 0;
1634
1635             for (y2 = FFMAX(y - 1, 0); y2 < FFMIN(8, y + 2); y2++) {
1636                 for (x2= FFMAX(x - 1, 0); x2 < FFMIN(8, x + 2); x2++) {
1637                     int v = ptr[x2 + y2 * stride];
1638                     sum += v;
1639                     sqr += v * v;
1640                     count++;
1641                 }
1642             }
1643             weight[x + 8 * y]= (36 * ff_sqrt(count * sqr - sum * sum)) / count;
1644         }
1645     }
1646 }
1647
1648 static av_always_inline void encode_mb_internal(MpegEncContext *s,
1649                                                 int motion_x, int motion_y,
1650                                                 int mb_block_height,
1651                                                 int mb_block_count)
1652 {
1653     int16_t weight[8][64];
1654     int16_t orig[8][64];
1655     const int mb_x = s->mb_x;
1656     const int mb_y = s->mb_y;
1657     int i;
1658     int skip_dct[8];
1659     int dct_offset = s->linesize * 8; // default for progressive frames
1660     uint8_t *ptr_y, *ptr_cb, *ptr_cr;
1661     ptrdiff_t wrap_y, wrap_c;
1662
1663     for (i = 0; i < mb_block_count; i++)
1664         skip_dct[i] = s->skipdct;
1665
1666     if (s->adaptive_quant) {
1667         const int last_qp = s->qscale;
1668         const int mb_xy = mb_x + mb_y * s->mb_stride;
1669
1670         s->lambda = s->lambda_table[mb_xy];
1671         update_qscale(s);
1672
1673         if (!(s->mpv_flags & FF_MPV_FLAG_QP_RD)) {
1674             s->qscale = s->current_picture_ptr->qscale_table[mb_xy];
1675             s->dquant = s->qscale - last_qp;
1676
1677             if (s->out_format == FMT_H263) {
1678                 s->dquant = av_clip(s->dquant, -2, 2);
1679
1680                 if (s->codec_id == AV_CODEC_ID_MPEG4) {
1681                     if (!s->mb_intra) {
1682                         if (s->pict_type == AV_PICTURE_TYPE_B) {
1683                             if (s->dquant & 1 || s->mv_dir & MV_DIRECT)
1684                                 s->dquant = 0;
1685                         }
1686                         if (s->mv_type == MV_TYPE_8X8)
1687                             s->dquant = 0;
1688                     }
1689                 }
1690             }
1691         }
1692         ff_set_qscale(s, last_qp + s->dquant);
1693     } else if (s->mpv_flags & FF_MPV_FLAG_QP_RD)
1694         ff_set_qscale(s, s->qscale + s->dquant);
1695
1696     wrap_y = s->linesize;
1697     wrap_c = s->uvlinesize;
1698     ptr_y  = s->new_picture.f.data[0] +
1699              (mb_y * 16 * wrap_y)              + mb_x * 16;
1700     ptr_cb = s->new_picture.f.data[1] +
1701              (mb_y * mb_block_height * wrap_c) + mb_x * 8;
1702     ptr_cr = s->new_picture.f.data[2] +
1703              (mb_y * mb_block_height * wrap_c) + mb_x * 8;
1704
1705     if (mb_x * 16 + 16 > s->width || mb_y * 16 + 16 > s->height) {
1706         uint8_t *ebuf = s->edge_emu_buffer + 32;
1707         s->vdsp.emulated_edge_mc(ebuf, ptr_y,
1708                                  wrap_y, wrap_y,
1709                                  16, 16, mb_x * 16, mb_y * 16,
1710                                  s->width, s->height);
1711         ptr_y = ebuf;
1712         s->vdsp.emulated_edge_mc(ebuf + 18 * wrap_y, ptr_cb,
1713                                  wrap_c, wrap_c,
1714                                  8, mb_block_height, mb_x * 8, mb_y * 8,
1715                                  s->width >> 1, s->height >> 1);
1716         ptr_cb = ebuf + 18 * wrap_y;
1717         s->vdsp.emulated_edge_mc(ebuf + 18 * wrap_y + 8, ptr_cr,
1718                                  wrap_c, wrap_c,
1719                                  8, mb_block_height, mb_x * 8, mb_y * 8,
1720                                  s->width >> 1, s->height >> 1);
1721         ptr_cr = ebuf + 18 * wrap_y + 8;
1722     }
1723
1724     if (s->mb_intra) {
1725         if (s->flags & CODEC_FLAG_INTERLACED_DCT) {
1726             int progressive_score, interlaced_score;
1727
1728             s->interlaced_dct = 0;
1729             progressive_score = s->dsp.ildct_cmp[4](s, ptr_y,
1730                                                     NULL, wrap_y, 8) +
1731                                 s->dsp.ildct_cmp[4](s, ptr_y + wrap_y * 8,
1732                                                     NULL, wrap_y, 8) - 400;
1733
1734             if (progressive_score > 0) {
1735                 interlaced_score = s->dsp.ildct_cmp[4](s, ptr_y,
1736                                                        NULL, wrap_y * 2, 8) +
1737                                    s->dsp.ildct_cmp[4](s, ptr_y + wrap_y,
1738                                                        NULL, wrap_y * 2, 8);
1739                 if (progressive_score > interlaced_score) {
1740                     s->interlaced_dct = 1;
1741
1742                     dct_offset = wrap_y;
1743                     wrap_y <<= 1;
1744                     if (s->chroma_format == CHROMA_422)
1745                         wrap_c <<= 1;
1746                 }
1747             }
1748         }
1749
1750         s->dsp.get_pixels(s->block[0], ptr_y                  , wrap_y);
1751         s->dsp.get_pixels(s->block[1], ptr_y              + 8 , wrap_y);
1752         s->dsp.get_pixels(s->block[2], ptr_y + dct_offset     , wrap_y);
1753         s->dsp.get_pixels(s->block[3], ptr_y + dct_offset + 8 , wrap_y);
1754
1755         if (s->flags & CODEC_FLAG_GRAY) {
1756             skip_dct[4] = 1;
1757             skip_dct[5] = 1;
1758         } else {
1759             s->dsp.get_pixels(s->block[4], ptr_cb, wrap_c);
1760             s->dsp.get_pixels(s->block[5], ptr_cr, wrap_c);
1761             if (!s->chroma_y_shift) { /* 422 */
1762                 s->dsp.get_pixels(s->block[6],
1763                                   ptr_cb + (dct_offset >> 1), wrap_c);
1764                 s->dsp.get_pixels(s->block[7],
1765                                   ptr_cr + (dct_offset >> 1), wrap_c);
1766             }
1767         }
1768     } else {
1769         op_pixels_func (*op_pix)[4];
1770         qpel_mc_func (*op_qpix)[16];
1771         uint8_t *dest_y, *dest_cb, *dest_cr;
1772
1773         dest_y  = s->dest[0];
1774         dest_cb = s->dest[1];
1775         dest_cr = s->dest[2];
1776
1777         if ((!s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
1778             op_pix  = s->hdsp.put_pixels_tab;
1779             op_qpix = s->dsp.put_qpel_pixels_tab;
1780         } else {
1781             op_pix  = s->hdsp.put_no_rnd_pixels_tab;
1782             op_qpix = s->dsp.put_no_rnd_qpel_pixels_tab;
1783         }
1784
1785         if (s->mv_dir & MV_DIR_FORWARD) {
1786             ff_MPV_motion(s, dest_y, dest_cb, dest_cr, 0,
1787                           s->last_picture.f.data,
1788                           op_pix, op_qpix);
1789             op_pix  = s->hdsp.avg_pixels_tab;
1790             op_qpix = s->dsp.avg_qpel_pixels_tab;
1791         }
1792         if (s->mv_dir & MV_DIR_BACKWARD) {
1793             ff_MPV_motion(s, dest_y, dest_cb, dest_cr, 1,
1794                           s->next_picture.f.data,
1795                           op_pix, op_qpix);
1796         }
1797
1798         if (s->flags & CODEC_FLAG_INTERLACED_DCT) {
1799             int progressive_score, interlaced_score;
1800
1801             s->interlaced_dct = 0;
1802             progressive_score = s->dsp.ildct_cmp[0](s, dest_y,
1803                                                     ptr_y,              wrap_y,
1804                                                     8) +
1805                                 s->dsp.ildct_cmp[0](s, dest_y + wrap_y * 8,
1806                                                     ptr_y + wrap_y * 8, wrap_y,
1807                                                     8) - 400;
1808
1809             if (s->avctx->ildct_cmp == FF_CMP_VSSE)
1810                 progressive_score -= 400;
1811
1812             if (progressive_score > 0) {
1813                 interlaced_score = s->dsp.ildct_cmp[0](s, dest_y,
1814                                                        ptr_y,
1815                                                        wrap_y * 2, 8) +
1816                                    s->dsp.ildct_cmp[0](s, dest_y + wrap_y,
1817                                                        ptr_y + wrap_y,
1818                                                        wrap_y * 2, 8);
1819
1820                 if (progressive_score > interlaced_score) {
1821                     s->interlaced_dct = 1;
1822
1823                     dct_offset = wrap_y;
1824                     wrap_y <<= 1;
1825                     if (s->chroma_format == CHROMA_422)
1826                         wrap_c <<= 1;
1827                 }
1828             }
1829         }
1830
1831         s->dsp.diff_pixels(s->block[0], ptr_y, dest_y, wrap_y);
1832         s->dsp.diff_pixels(s->block[1], ptr_y + 8, dest_y + 8, wrap_y);
1833         s->dsp.diff_pixels(s->block[2], ptr_y + dct_offset,
1834                            dest_y + dct_offset, wrap_y);
1835         s->dsp.diff_pixels(s->block[3], ptr_y + dct_offset + 8,
1836                            dest_y + dct_offset + 8, wrap_y);
1837
1838         if (s->flags & CODEC_FLAG_GRAY) {
1839             skip_dct[4] = 1;
1840             skip_dct[5] = 1;
1841         } else {
1842             s->dsp.diff_pixels(s->block[4], ptr_cb, dest_cb, wrap_c);
1843             s->dsp.diff_pixels(s->block[5], ptr_cr, dest_cr, wrap_c);
1844             if (!s->chroma_y_shift) { /* 422 */
1845                 s->dsp.diff_pixels(s->block[6], ptr_cb + (dct_offset >> 1),
1846                                    dest_cb + (dct_offset >> 1), wrap_c);
1847                 s->dsp.diff_pixels(s->block[7], ptr_cr + (dct_offset >> 1),
1848                                    dest_cr + (dct_offset >> 1), wrap_c);
1849             }
1850         }
1851         /* pre quantization */
1852         if (s->current_picture.mc_mb_var[s->mb_stride * mb_y + mb_x] <
1853                 2 * s->qscale * s->qscale) {
1854             // FIXME optimize
1855             if (s->dsp.sad[1](NULL, ptr_y , dest_y,
1856                               wrap_y, 8) < 20 * s->qscale)
1857                 skip_dct[0] = 1;
1858             if (s->dsp.sad[1](NULL, ptr_y + 8,
1859                               dest_y + 8, wrap_y, 8) < 20 * s->qscale)
1860                 skip_dct[1] = 1;
1861             if (s->dsp.sad[1](NULL, ptr_y + dct_offset,
1862                               dest_y + dct_offset, wrap_y, 8) < 20 * s->qscale)
1863                 skip_dct[2] = 1;
1864             if (s->dsp.sad[1](NULL, ptr_y + dct_offset + 8,
1865                               dest_y + dct_offset + 8,
1866                               wrap_y, 8) < 20 * s->qscale)
1867                 skip_dct[3] = 1;
1868             if (s->dsp.sad[1](NULL, ptr_cb, dest_cb,
1869                               wrap_c, 8) < 20 * s->qscale)
1870                 skip_dct[4] = 1;
1871             if (s->dsp.sad[1](NULL, ptr_cr, dest_cr,
1872                               wrap_c, 8) < 20 * s->qscale)
1873                 skip_dct[5] = 1;
1874             if (!s->chroma_y_shift) { /* 422 */
1875                 if (s->dsp.sad[1](NULL, ptr_cb + (dct_offset >> 1),
1876                                   dest_cb + (dct_offset >> 1),
1877                                   wrap_c, 8) < 20 * s->qscale)
1878                     skip_dct[6] = 1;
1879                 if (s->dsp.sad[1](NULL, ptr_cr + (dct_offset >> 1),
1880                                   dest_cr + (dct_offset >> 1),
1881                                   wrap_c, 8) < 20 * s->qscale)
1882                     skip_dct[7] = 1;
1883             }
1884         }
1885     }
1886
1887     if (s->quantizer_noise_shaping) {
1888         if (!skip_dct[0])
1889             get_visual_weight(weight[0], ptr_y                 , wrap_y);
1890         if (!skip_dct[1])
1891             get_visual_weight(weight[1], ptr_y              + 8, wrap_y);
1892         if (!skip_dct[2])
1893             get_visual_weight(weight[2], ptr_y + dct_offset    , wrap_y);
1894         if (!skip_dct[3])
1895             get_visual_weight(weight[3], ptr_y + dct_offset + 8, wrap_y);
1896         if (!skip_dct[4])
1897             get_visual_weight(weight[4], ptr_cb                , wrap_c);
1898         if (!skip_dct[5])
1899             get_visual_weight(weight[5], ptr_cr                , wrap_c);
1900         if (!s->chroma_y_shift) { /* 422 */
1901             if (!skip_dct[6])
1902                 get_visual_weight(weight[6], ptr_cb + (dct_offset >> 1),
1903                                   wrap_c);
1904             if (!skip_dct[7])
1905                 get_visual_weight(weight[7], ptr_cr + (dct_offset >> 1),
1906                                   wrap_c);
1907         }
1908         memcpy(orig[0], s->block[0], sizeof(int16_t) * 64 * mb_block_count);
1909     }
1910
1911     /* DCT & quantize */
1912     assert(s->out_format != FMT_MJPEG || s->qscale == 8);
1913     {
1914         for (i = 0; i < mb_block_count; i++) {
1915             if (!skip_dct[i]) {
1916                 int overflow;
1917                 s->block_last_index[i] = s->dct_quantize(s, s->block[i], i, s->qscale, &overflow);
1918                 // FIXME we could decide to change to quantizer instead of
1919                 // clipping
1920                 // JS: I don't think that would be a good idea it could lower
1921                 //     quality instead of improve it. Just INTRADC clipping
1922                 //     deserves changes in quantizer
1923                 if (overflow)
1924                     clip_coeffs(s, s->block[i], s->block_last_index[i]);
1925             } else
1926                 s->block_last_index[i] = -1;
1927         }
1928         if (s->quantizer_noise_shaping) {
1929             for (i = 0; i < mb_block_count; i++) {
1930                 if (!skip_dct[i]) {
1931                     s->block_last_index[i] =
1932                         dct_quantize_refine(s, s->block[i], weight[i],
1933                                             orig[i], i, s->qscale);
1934                 }
1935             }
1936         }
1937
1938         if (s->luma_elim_threshold && !s->mb_intra)
1939             for (i = 0; i < 4; i++)
1940                 dct_single_coeff_elimination(s, i, s->luma_elim_threshold);
1941         if (s->chroma_elim_threshold && !s->mb_intra)
1942             for (i = 4; i < mb_block_count; i++)
1943                 dct_single_coeff_elimination(s, i, s->chroma_elim_threshold);
1944
1945         if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
1946             for (i = 0; i < mb_block_count; i++) {
1947                 if (s->block_last_index[i] == -1)
1948                     s->coded_score[i] = INT_MAX / 256;
1949             }
1950         }
1951     }
1952
1953     if ((s->flags & CODEC_FLAG_GRAY) && s->mb_intra) {
1954         s->block_last_index[4] =
1955         s->block_last_index[5] = 0;
1956         s->block[4][0] =
1957         s->block[5][0] = (1024 + s->c_dc_scale / 2) / s->c_dc_scale;
1958     }
1959
1960     // non c quantize code returns incorrect block_last_index FIXME
1961     if (s->alternate_scan && s->dct_quantize != ff_dct_quantize_c) {
1962         for (i = 0; i < mb_block_count; i++) {
1963             int j;
1964             if (s->block_last_index[i] > 0) {
1965                 for (j = 63; j > 0; j--) {
1966                     if (s->block[i][s->intra_scantable.permutated[j]])
1967                         break;
1968                 }
1969                 s->block_last_index[i] = j;
1970             }
1971         }
1972     }
1973
1974     /* huffman encode */
1975     switch(s->codec_id){ //FIXME funct ptr could be slightly faster
1976     case AV_CODEC_ID_MPEG1VIDEO:
1977     case AV_CODEC_ID_MPEG2VIDEO:
1978         if (CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER)
1979             ff_mpeg1_encode_mb(s, s->block, motion_x, motion_y);
1980         break;
1981     case AV_CODEC_ID_MPEG4:
1982         if (CONFIG_MPEG4_ENCODER)
1983             ff_mpeg4_encode_mb(s, s->block, motion_x, motion_y);
1984         break;
1985     case AV_CODEC_ID_MSMPEG4V2:
1986     case AV_CODEC_ID_MSMPEG4V3:
1987     case AV_CODEC_ID_WMV1:
1988         if (CONFIG_MSMPEG4_ENCODER)
1989             ff_msmpeg4_encode_mb(s, s->block, motion_x, motion_y);
1990         break;
1991     case AV_CODEC_ID_WMV2:
1992         if (CONFIG_WMV2_ENCODER)
1993             ff_wmv2_encode_mb(s, s->block, motion_x, motion_y);
1994         break;
1995     case AV_CODEC_ID_H261:
1996         if (CONFIG_H261_ENCODER)
1997             ff_h261_encode_mb(s, s->block, motion_x, motion_y);
1998         break;
1999     case AV_CODEC_ID_H263:
2000     case AV_CODEC_ID_H263P:
2001     case AV_CODEC_ID_FLV1:
2002     case AV_CODEC_ID_RV10:
2003     case AV_CODEC_ID_RV20:
2004         if (CONFIG_H263_ENCODER)
2005             ff_h263_encode_mb(s, s->block, motion_x, motion_y);
2006         break;
2007     case AV_CODEC_ID_MJPEG:
2008         if (CONFIG_MJPEG_ENCODER)
2009             ff_mjpeg_encode_mb(s, s->block);
2010         break;
2011     default:
2012         assert(0);
2013     }
2014 }
2015
2016 static av_always_inline void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
2017 {
2018     if (s->chroma_format == CHROMA_420) encode_mb_internal(s, motion_x, motion_y,  8, 6);
2019     else                                encode_mb_internal(s, motion_x, motion_y, 16, 8);
2020 }
2021
2022 static inline void copy_context_before_encode(MpegEncContext *d, MpegEncContext *s, int type){
2023     int i;
2024
2025     memcpy(d->last_mv, s->last_mv, 2*2*2*sizeof(int)); //FIXME is memcpy faster than a loop?
2026
2027     /* mpeg1 */
2028     d->mb_skip_run= s->mb_skip_run;
2029     for(i=0; i<3; i++)
2030         d->last_dc[i] = s->last_dc[i];
2031
2032     /* statistics */
2033     d->mv_bits= s->mv_bits;
2034     d->i_tex_bits= s->i_tex_bits;
2035     d->p_tex_bits= s->p_tex_bits;
2036     d->i_count= s->i_count;
2037     d->f_count= s->f_count;
2038     d->b_count= s->b_count;
2039     d->skip_count= s->skip_count;
2040     d->misc_bits= s->misc_bits;
2041     d->last_bits= 0;
2042
2043     d->mb_skipped= 0;
2044     d->qscale= s->qscale;
2045     d->dquant= s->dquant;
2046
2047     d->esc3_level_length= s->esc3_level_length;
2048 }
2049
2050 static inline void copy_context_after_encode(MpegEncContext *d, MpegEncContext *s, int type){
2051     int i;
2052
2053     memcpy(d->mv, s->mv, 2*4*2*sizeof(int));
2054     memcpy(d->last_mv, s->last_mv, 2*2*2*sizeof(int)); //FIXME is memcpy faster than a loop?
2055
2056     /* mpeg1 */
2057     d->mb_skip_run= s->mb_skip_run;
2058     for(i=0; i<3; i++)
2059         d->last_dc[i] = s->last_dc[i];
2060
2061     /* statistics */
2062     d->mv_bits= s->mv_bits;
2063     d->i_tex_bits= s->i_tex_bits;
2064     d->p_tex_bits= s->p_tex_bits;
2065     d->i_count= s->i_count;
2066     d->f_count= s->f_count;
2067     d->b_count= s->b_count;
2068     d->skip_count= s->skip_count;
2069     d->misc_bits= s->misc_bits;
2070
2071     d->mb_intra= s->mb_intra;
2072     d->mb_skipped= s->mb_skipped;
2073     d->mv_type= s->mv_type;
2074     d->mv_dir= s->mv_dir;
2075     d->pb= s->pb;
2076     if(s->data_partitioning){
2077         d->pb2= s->pb2;
2078         d->tex_pb= s->tex_pb;
2079     }
2080     d->block= s->block;
2081     for(i=0; i<8; i++)
2082         d->block_last_index[i]= s->block_last_index[i];
2083     d->interlaced_dct= s->interlaced_dct;
2084     d->qscale= s->qscale;
2085
2086     d->esc3_level_length= s->esc3_level_length;
2087 }
2088
2089 static inline void encode_mb_hq(MpegEncContext *s, MpegEncContext *backup, MpegEncContext *best, int type,
2090                            PutBitContext pb[2], PutBitContext pb2[2], PutBitContext tex_pb[2],
2091                            int *dmin, int *next_block, int motion_x, int motion_y)
2092 {
2093     int score;
2094     uint8_t *dest_backup[3];
2095
2096     copy_context_before_encode(s, backup, type);
2097
2098     s->block= s->blocks[*next_block];
2099     s->pb= pb[*next_block];
2100     if(s->data_partitioning){
2101         s->pb2   = pb2   [*next_block];
2102         s->tex_pb= tex_pb[*next_block];
2103     }
2104
2105     if(*next_block){
2106         memcpy(dest_backup, s->dest, sizeof(s->dest));
2107         s->dest[0] = s->rd_scratchpad;
2108         s->dest[1] = s->rd_scratchpad + 16*s->linesize;
2109         s->dest[2] = s->rd_scratchpad + 16*s->linesize + 8;
2110         assert(s->linesize >= 32); //FIXME
2111     }
2112
2113     encode_mb(s, motion_x, motion_y);
2114
2115     score= put_bits_count(&s->pb);
2116     if(s->data_partitioning){
2117         score+= put_bits_count(&s->pb2);
2118         score+= put_bits_count(&s->tex_pb);
2119     }
2120
2121     if(s->avctx->mb_decision == FF_MB_DECISION_RD){
2122         ff_MPV_decode_mb(s, s->block);
2123
2124         score *= s->lambda2;
2125         score += sse_mb(s) << FF_LAMBDA_SHIFT;
2126     }
2127
2128     if(*next_block){
2129         memcpy(s->dest, dest_backup, sizeof(s->dest));
2130     }
2131
2132     if(score<*dmin){
2133         *dmin= score;
2134         *next_block^=1;
2135
2136         copy_context_after_encode(best, s, type);
2137     }
2138 }
2139
2140 static int sse(MpegEncContext *s, uint8_t *src1, uint8_t *src2, int w, int h, int stride){
2141     uint32_t *sq = ff_squareTbl + 256;
2142     int acc=0;
2143     int x,y;
2144
2145     if(w==16 && h==16)
2146         return s->dsp.sse[0](NULL, src1, src2, stride, 16);
2147     else if(w==8 && h==8)
2148         return s->dsp.sse[1](NULL, src1, src2, stride, 8);
2149
2150     for(y=0; y<h; y++){
2151         for(x=0; x<w; x++){
2152             acc+= sq[src1[x + y*stride] - src2[x + y*stride]];
2153         }
2154     }
2155
2156     assert(acc>=0);
2157
2158     return acc;
2159 }
2160
2161 static int sse_mb(MpegEncContext *s){
2162     int w= 16;
2163     int h= 16;
2164
2165     if(s->mb_x*16 + 16 > s->width ) w= s->width - s->mb_x*16;
2166     if(s->mb_y*16 + 16 > s->height) h= s->height- s->mb_y*16;
2167
2168     if(w==16 && h==16)
2169       if(s->avctx->mb_cmp == FF_CMP_NSSE){
2170         return  s->dsp.nsse[0](s, s->new_picture.f.data[0] + s->mb_x*16 + s->mb_y*s->linesize*16, s->dest[0], s->linesize, 16)
2171                +s->dsp.nsse[1](s, s->new_picture.f.data[1] + s->mb_x*8  + s->mb_y*s->uvlinesize*8,s->dest[1], s->uvlinesize, 8)
2172                +s->dsp.nsse[1](s, s->new_picture.f.data[2] + s->mb_x*8  + s->mb_y*s->uvlinesize*8,s->dest[2], s->uvlinesize, 8);
2173       }else{
2174         return  s->dsp.sse[0](NULL, s->new_picture.f.data[0] + s->mb_x*16 + s->mb_y*s->linesize*16, s->dest[0], s->linesize, 16)
2175                +s->dsp.sse[1](NULL, s->new_picture.f.data[1] + s->mb_x*8  + s->mb_y*s->uvlinesize*8,s->dest[1], s->uvlinesize, 8)
2176                +s->dsp.sse[1](NULL, s->new_picture.f.data[2] + s->mb_x*8  + s->mb_y*s->uvlinesize*8,s->dest[2], s->uvlinesize, 8);
2177       }
2178     else
2179         return  sse(s, s->new_picture.f.data[0] + s->mb_x*16 + s->mb_y*s->linesize*16, s->dest[0], w, h, s->linesize)
2180                +sse(s, s->new_picture.f.data[1] + s->mb_x*8  + s->mb_y*s->uvlinesize*8,s->dest[1], w>>1, h>>1, s->uvlinesize)
2181                +sse(s, s->new_picture.f.data[2] + s->mb_x*8  + s->mb_y*s->uvlinesize*8,s->dest[2], w>>1, h>>1, s->uvlinesize);
2182 }
2183
2184 static int pre_estimate_motion_thread(AVCodecContext *c, void *arg){
2185     MpegEncContext *s= *(void**)arg;
2186
2187
2188     s->me.pre_pass=1;
2189     s->me.dia_size= s->avctx->pre_dia_size;
2190     s->first_slice_line=1;
2191     for(s->mb_y= s->end_mb_y-1; s->mb_y >= s->start_mb_y; s->mb_y--) {
2192         for(s->mb_x=s->mb_width-1; s->mb_x >=0 ;s->mb_x--) {
2193             ff_pre_estimate_p_frame_motion(s, s->mb_x, s->mb_y);
2194         }
2195         s->first_slice_line=0;
2196     }
2197
2198     s->me.pre_pass=0;
2199
2200     return 0;
2201 }
2202
2203 static int estimate_motion_thread(AVCodecContext *c, void *arg){
2204     MpegEncContext *s= *(void**)arg;
2205
2206     ff_check_alignment();
2207
2208     s->me.dia_size= s->avctx->dia_size;
2209     s->first_slice_line=1;
2210     for(s->mb_y= s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2211         s->mb_x=0; //for block init below
2212         ff_init_block_index(s);
2213         for(s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
2214             s->block_index[0]+=2;
2215             s->block_index[1]+=2;
2216             s->block_index[2]+=2;
2217             s->block_index[3]+=2;
2218
2219             /* compute motion vector & mb_type and store in context */
2220             if(s->pict_type==AV_PICTURE_TYPE_B)
2221                 ff_estimate_b_frame_motion(s, s->mb_x, s->mb_y);
2222             else
2223                 ff_estimate_p_frame_motion(s, s->mb_x, s->mb_y);
2224         }
2225         s->first_slice_line=0;
2226     }
2227     return 0;
2228 }
2229
2230 static int mb_var_thread(AVCodecContext *c, void *arg){
2231     MpegEncContext *s= *(void**)arg;
2232     int mb_x, mb_y;
2233
2234     ff_check_alignment();
2235
2236     for(mb_y=s->start_mb_y; mb_y < s->end_mb_y; mb_y++) {
2237         for(mb_x=0; mb_x < s->mb_width; mb_x++) {
2238             int xx = mb_x * 16;
2239             int yy = mb_y * 16;
2240             uint8_t *pix = s->new_picture.f.data[0] + (yy * s->linesize) + xx;
2241             int varc;
2242             int sum = s->dsp.pix_sum(pix, s->linesize);
2243
2244             varc = (s->dsp.pix_norm1(pix, s->linesize) - (((unsigned)sum*sum)>>8) + 500 + 128)>>8;
2245
2246             s->current_picture.mb_var [s->mb_stride * mb_y + mb_x] = varc;
2247             s->current_picture.mb_mean[s->mb_stride * mb_y + mb_x] = (sum+128)>>8;
2248             s->me.mb_var_sum_temp    += varc;
2249         }
2250     }
2251     return 0;
2252 }
2253
2254 static void write_slice_end(MpegEncContext *s){
2255     if(CONFIG_MPEG4_ENCODER && s->codec_id==AV_CODEC_ID_MPEG4){
2256         if(s->partitioned_frame){
2257             ff_mpeg4_merge_partitions(s);
2258         }
2259
2260         ff_mpeg4_stuffing(&s->pb);
2261     }else if(CONFIG_MJPEG_ENCODER && s->out_format == FMT_MJPEG){
2262         ff_mjpeg_encode_stuffing(&s->pb);
2263     }
2264
2265     avpriv_align_put_bits(&s->pb);
2266     flush_put_bits(&s->pb);
2267
2268     if((s->flags&CODEC_FLAG_PASS1) && !s->partitioned_frame)
2269         s->misc_bits+= get_bits_diff(s);
2270 }
2271
2272 static void write_mb_info(MpegEncContext *s)
2273 {
2274     uint8_t *ptr = s->mb_info_ptr + s->mb_info_size - 12;
2275     int offset = put_bits_count(&s->pb);
2276     int mba  = s->mb_x + s->mb_width * (s->mb_y % s->gob_index);
2277     int gobn = s->mb_y / s->gob_index;
2278     int pred_x, pred_y;
2279     if (CONFIG_H263_ENCODER)
2280         ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
2281     bytestream_put_le32(&ptr, offset);
2282     bytestream_put_byte(&ptr, s->qscale);
2283     bytestream_put_byte(&ptr, gobn);
2284     bytestream_put_le16(&ptr, mba);
2285     bytestream_put_byte(&ptr, pred_x); /* hmv1 */
2286     bytestream_put_byte(&ptr, pred_y); /* vmv1 */
2287     /* 4MV not implemented */
2288     bytestream_put_byte(&ptr, 0); /* hmv2 */
2289     bytestream_put_byte(&ptr, 0); /* vmv2 */
2290 }
2291
2292 static void update_mb_info(MpegEncContext *s, int startcode)
2293 {
2294     if (!s->mb_info)
2295         return;
2296     if (put_bits_count(&s->pb) - s->prev_mb_info*8 >= s->mb_info*8) {
2297         s->mb_info_size += 12;
2298         s->prev_mb_info = s->last_mb_info;
2299     }
2300     if (startcode) {
2301         s->prev_mb_info = put_bits_count(&s->pb)/8;
2302         /* This might have incremented mb_info_size above, and we return without
2303          * actually writing any info into that slot yet. But in that case,
2304          * this will be called again at the start of the after writing the
2305          * start code, actually writing the mb info. */
2306         return;
2307     }
2308
2309     s->last_mb_info = put_bits_count(&s->pb)/8;
2310     if (!s->mb_info_size)
2311         s->mb_info_size += 12;
2312     write_mb_info(s);
2313 }
2314
2315 static int encode_thread(AVCodecContext *c, void *arg){
2316     MpegEncContext *s= *(void**)arg;
2317     int mb_x, mb_y, pdif = 0;
2318     int chr_h= 16>>s->chroma_y_shift;
2319     int i, j;
2320     MpegEncContext best_s, backup_s;
2321     uint8_t bit_buf[2][MAX_MB_BYTES];
2322     uint8_t bit_buf2[2][MAX_MB_BYTES];
2323     uint8_t bit_buf_tex[2][MAX_MB_BYTES];
2324     PutBitContext pb[2], pb2[2], tex_pb[2];
2325
2326     ff_check_alignment();
2327
2328     for(i=0; i<2; i++){
2329         init_put_bits(&pb    [i], bit_buf    [i], MAX_MB_BYTES);
2330         init_put_bits(&pb2   [i], bit_buf2   [i], MAX_MB_BYTES);
2331         init_put_bits(&tex_pb[i], bit_buf_tex[i], MAX_MB_BYTES);
2332     }
2333
2334     s->last_bits= put_bits_count(&s->pb);
2335     s->mv_bits=0;
2336     s->misc_bits=0;
2337     s->i_tex_bits=0;
2338     s->p_tex_bits=0;
2339     s->i_count=0;
2340     s->f_count=0;
2341     s->b_count=0;
2342     s->skip_count=0;
2343
2344     for(i=0; i<3; i++){
2345         /* init last dc values */
2346         /* note: quant matrix value (8) is implied here */
2347         s->last_dc[i] = 128 << s->intra_dc_precision;
2348
2349         s->current_picture.f.error[i] = 0;
2350     }
2351     s->mb_skip_run = 0;
2352     memset(s->last_mv, 0, sizeof(s->last_mv));
2353
2354     s->last_mv_dir = 0;
2355
2356     switch(s->codec_id){
2357     case AV_CODEC_ID_H263:
2358     case AV_CODEC_ID_H263P:
2359     case AV_CODEC_ID_FLV1:
2360         if (CONFIG_H263_ENCODER)
2361             s->gob_index = ff_h263_get_gob_height(s);
2362         break;
2363     case AV_CODEC_ID_MPEG4:
2364         if(CONFIG_MPEG4_ENCODER && s->partitioned_frame)
2365             ff_mpeg4_init_partitions(s);
2366         break;
2367     }
2368
2369     s->resync_mb_x=0;
2370     s->resync_mb_y=0;
2371     s->first_slice_line = 1;
2372     s->ptr_lastgob = s->pb.buf;
2373     for(mb_y= s->start_mb_y; mb_y < s->end_mb_y; mb_y++) {
2374         s->mb_x=0;
2375         s->mb_y= mb_y;
2376
2377         ff_set_qscale(s, s->qscale);
2378         ff_init_block_index(s);
2379
2380         for(mb_x=0; mb_x < s->mb_width; mb_x++) {
2381             int xy= mb_y*s->mb_stride + mb_x; // removed const, H261 needs to adjust this
2382             int mb_type= s->mb_type[xy];
2383 //            int d;
2384             int dmin= INT_MAX;
2385             int dir;
2386
2387             if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < MAX_MB_BYTES){
2388                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
2389                 return -1;
2390             }
2391             if(s->data_partitioning){
2392                 if(   s->pb2   .buf_end - s->pb2   .buf - (put_bits_count(&s->    pb2)>>3) < MAX_MB_BYTES
2393                    || s->tex_pb.buf_end - s->tex_pb.buf - (put_bits_count(&s->tex_pb )>>3) < MAX_MB_BYTES){
2394                     av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
2395                     return -1;
2396                 }
2397             }
2398
2399             s->mb_x = mb_x;
2400             s->mb_y = mb_y;  // moved into loop, can get changed by H.261
2401             ff_update_block_index(s);
2402
2403             if(CONFIG_H261_ENCODER && s->codec_id == AV_CODEC_ID_H261){
2404                 ff_h261_reorder_mb_index(s);
2405                 xy= s->mb_y*s->mb_stride + s->mb_x;
2406                 mb_type= s->mb_type[xy];
2407             }
2408
2409             /* write gob / video packet header  */
2410             if(s->rtp_mode){
2411                 int current_packet_size, is_gob_start;
2412
2413                 current_packet_size= ((put_bits_count(&s->pb)+7)>>3) - (s->ptr_lastgob - s->pb.buf);
2414
2415                 is_gob_start= s->avctx->rtp_payload_size && current_packet_size >= s->avctx->rtp_payload_size && mb_y + mb_x>0;
2416
2417                 if(s->start_mb_y == mb_y && mb_y > 0 && mb_x==0) is_gob_start=1;
2418
2419                 switch(s->codec_id){
2420                 case AV_CODEC_ID_H263:
2421                 case AV_CODEC_ID_H263P:
2422                     if(!s->h263_slice_structured)
2423                         if(s->mb_x || s->mb_y%s->gob_index) is_gob_start=0;
2424                     break;
2425                 case AV_CODEC_ID_MPEG2VIDEO:
2426                     if(s->mb_x==0 && s->mb_y!=0) is_gob_start=1;
2427                 case AV_CODEC_ID_MPEG1VIDEO:
2428                     if(s->mb_skip_run) is_gob_start=0;
2429                     break;
2430                 }
2431
2432                 if(is_gob_start){
2433                     if(s->start_mb_y != mb_y || mb_x!=0){
2434                         write_slice_end(s);
2435
2436                         if(CONFIG_MPEG4_ENCODER && s->codec_id==AV_CODEC_ID_MPEG4 && s->partitioned_frame){
2437                             ff_mpeg4_init_partitions(s);
2438                         }
2439                     }
2440
2441                     assert((put_bits_count(&s->pb)&7) == 0);
2442                     current_packet_size= put_bits_ptr(&s->pb) - s->ptr_lastgob;
2443
2444                     if (s->error_rate && s->resync_mb_x + s->resync_mb_y > 0) {
2445                         int r= put_bits_count(&s->pb)/8 + s->picture_number + 16 + s->mb_x + s->mb_y;
2446                         int d = 100 / s->error_rate;
2447                         if(r % d == 0){
2448                             current_packet_size=0;
2449                             s->pb.buf_ptr= s->ptr_lastgob;
2450                             assert(put_bits_ptr(&s->pb) == s->ptr_lastgob);
2451                         }
2452                     }
2453
2454                     if (s->avctx->rtp_callback){
2455                         int number_mb = (mb_y - s->resync_mb_y)*s->mb_width + mb_x - s->resync_mb_x;
2456                         s->avctx->rtp_callback(s->avctx, s->ptr_lastgob, current_packet_size, number_mb);
2457                     }
2458                     update_mb_info(s, 1);
2459
2460                     switch(s->codec_id){
2461                     case AV_CODEC_ID_MPEG4:
2462                         if (CONFIG_MPEG4_ENCODER) {
2463                             ff_mpeg4_encode_video_packet_header(s);
2464                             ff_mpeg4_clean_buffers(s);
2465                         }
2466                     break;
2467                     case AV_CODEC_ID_MPEG1VIDEO:
2468                     case AV_CODEC_ID_MPEG2VIDEO:
2469                         if (CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER) {
2470                             ff_mpeg1_encode_slice_header(s);
2471                             ff_mpeg1_clean_buffers(s);
2472                         }
2473                     break;
2474                     case AV_CODEC_ID_H263:
2475                     case AV_CODEC_ID_H263P:
2476                         if (CONFIG_H263_ENCODER)
2477                             ff_h263_encode_gob_header(s, mb_y);
2478                     break;
2479                     }
2480
2481                     if(s->flags&CODEC_FLAG_PASS1){
2482                         int bits= put_bits_count(&s->pb);
2483                         s->misc_bits+= bits - s->last_bits;
2484                         s->last_bits= bits;
2485                     }
2486
2487                     s->ptr_lastgob += current_packet_size;
2488                     s->first_slice_line=1;
2489                     s->resync_mb_x=mb_x;
2490                     s->resync_mb_y=mb_y;
2491                 }
2492             }
2493
2494             if(  (s->resync_mb_x   == s->mb_x)
2495                && s->resync_mb_y+1 == s->mb_y){
2496                 s->first_slice_line=0;
2497             }
2498
2499             s->mb_skipped=0;
2500             s->dquant=0; //only for QP_RD
2501
2502             update_mb_info(s, 0);
2503
2504             if (mb_type & (mb_type-1) || (s->mpv_flags & FF_MPV_FLAG_QP_RD)) { // more than 1 MB type possible or FF_MPV_FLAG_QP_RD
2505                 int next_block=0;
2506                 int pb_bits_count, pb2_bits_count, tex_pb_bits_count;
2507
2508                 copy_context_before_encode(&backup_s, s, -1);
2509                 backup_s.pb= s->pb;
2510                 best_s.data_partitioning= s->data_partitioning;
2511                 best_s.partitioned_frame= s->partitioned_frame;
2512                 if(s->data_partitioning){
2513                     backup_s.pb2= s->pb2;
2514                     backup_s.tex_pb= s->tex_pb;
2515                 }
2516
2517                 if(mb_type&CANDIDATE_MB_TYPE_INTER){
2518                     s->mv_dir = MV_DIR_FORWARD;
2519                     s->mv_type = MV_TYPE_16X16;
2520                     s->mb_intra= 0;
2521                     s->mv[0][0][0] = s->p_mv_table[xy][0];
2522                     s->mv[0][0][1] = s->p_mv_table[xy][1];
2523                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_INTER, pb, pb2, tex_pb,
2524                                  &dmin, &next_block, s->mv[0][0][0], s->mv[0][0][1]);
2525                 }
2526                 if(mb_type&CANDIDATE_MB_TYPE_INTER_I){
2527                     s->mv_dir = MV_DIR_FORWARD;
2528                     s->mv_type = MV_TYPE_FIELD;
2529                     s->mb_intra= 0;
2530                     for(i=0; i<2; i++){
2531                         j= s->field_select[0][i] = s->p_field_select_table[i][xy];
2532                         s->mv[0][i][0] = s->p_field_mv_table[i][j][xy][0];
2533                         s->mv[0][i][1] = s->p_field_mv_table[i][j][xy][1];
2534                     }
2535                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_INTER_I, pb, pb2, tex_pb,
2536                                  &dmin, &next_block, 0, 0);
2537                 }
2538                 if(mb_type&CANDIDATE_MB_TYPE_SKIPPED){
2539                     s->mv_dir = MV_DIR_FORWARD;
2540                     s->mv_type = MV_TYPE_16X16;
2541                     s->mb_intra= 0;
2542                     s->mv[0][0][0] = 0;
2543                     s->mv[0][0][1] = 0;
2544                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_SKIPPED, pb, pb2, tex_pb,
2545                                  &dmin, &next_block, s->mv[0][0][0], s->mv[0][0][1]);
2546                 }
2547                 if(mb_type&CANDIDATE_MB_TYPE_INTER4V){
2548                     s->mv_dir = MV_DIR_FORWARD;
2549                     s->mv_type = MV_TYPE_8X8;
2550                     s->mb_intra= 0;
2551                     for(i=0; i<4; i++){
2552                         s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0];
2553                         s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1];
2554                     }
2555                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_INTER4V, pb, pb2, tex_pb,
2556                                  &dmin, &next_block, 0, 0);
2557                 }
2558                 if(mb_type&CANDIDATE_MB_TYPE_FORWARD){
2559                     s->mv_dir = MV_DIR_FORWARD;
2560                     s->mv_type = MV_TYPE_16X16;
2561                     s->mb_intra= 0;
2562                     s->mv[0][0][0] = s->b_forw_mv_table[xy][0];
2563                     s->mv[0][0][1] = s->b_forw_mv_table[xy][1];
2564                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_FORWARD, pb, pb2, tex_pb,
2565                                  &dmin, &next_block, s->mv[0][0][0], s->mv[0][0][1]);
2566                 }
2567                 if(mb_type&CANDIDATE_MB_TYPE_BACKWARD){
2568                     s->mv_dir = MV_DIR_BACKWARD;
2569                     s->mv_type = MV_TYPE_16X16;
2570                     s->mb_intra= 0;
2571                     s->mv[1][0][0] = s->b_back_mv_table[xy][0];
2572                     s->mv[1][0][1] = s->b_back_mv_table[xy][1];
2573                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_BACKWARD, pb, pb2, tex_pb,
2574                                  &dmin, &next_block, s->mv[1][0][0], s->mv[1][0][1]);
2575                 }
2576                 if(mb_type&CANDIDATE_MB_TYPE_BIDIR){
2577                     s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
2578                     s->mv_type = MV_TYPE_16X16;
2579                     s->mb_intra= 0;
2580                     s->mv[0][0][0] = s->b_bidir_forw_mv_table[xy][0];
2581                     s->mv[0][0][1] = s->b_bidir_forw_mv_table[xy][1];
2582                     s->mv[1][0][0] = s->b_bidir_back_mv_table[xy][0];
2583                     s->mv[1][0][1] = s->b_bidir_back_mv_table[xy][1];
2584                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_BIDIR, pb, pb2, tex_pb,
2585                                  &dmin, &next_block, 0, 0);
2586                 }
2587                 if(mb_type&CANDIDATE_MB_TYPE_FORWARD_I){
2588                     s->mv_dir = MV_DIR_FORWARD;
2589                     s->mv_type = MV_TYPE_FIELD;
2590                     s->mb_intra= 0;
2591                     for(i=0; i<2; i++){
2592                         j= s->field_select[0][i] = s->b_field_select_table[0][i][xy];
2593                         s->mv[0][i][0] = s->b_field_mv_table[0][i][j][xy][0];
2594                         s->mv[0][i][1] = s->b_field_mv_table[0][i][j][xy][1];
2595                     }
2596                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_FORWARD_I, pb, pb2, tex_pb,
2597                                  &dmin, &next_block, 0, 0);
2598                 }
2599                 if(mb_type&CANDIDATE_MB_TYPE_BACKWARD_I){
2600                     s->mv_dir = MV_DIR_BACKWARD;
2601                     s->mv_type = MV_TYPE_FIELD;
2602                     s->mb_intra= 0;
2603                     for(i=0; i<2; i++){
2604                         j= s->field_select[1][i] = s->b_field_select_table[1][i][xy];
2605                         s->mv[1][i][0] = s->b_field_mv_table[1][i][j][xy][0];
2606                         s->mv[1][i][1] = s->b_field_mv_table[1][i][j][xy][1];
2607                     }
2608                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_BACKWARD_I, pb, pb2, tex_pb,
2609                                  &dmin, &next_block, 0, 0);
2610                 }
2611                 if(mb_type&CANDIDATE_MB_TYPE_BIDIR_I){
2612                     s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
2613                     s->mv_type = MV_TYPE_FIELD;
2614                     s->mb_intra= 0;
2615                     for(dir=0; dir<2; dir++){
2616                         for(i=0; i<2; i++){
2617                             j= s->field_select[dir][i] = s->b_field_select_table[dir][i][xy];
2618                             s->mv[dir][i][0] = s->b_field_mv_table[dir][i][j][xy][0];
2619                             s->mv[dir][i][1] = s->b_field_mv_table[dir][i][j][xy][1];
2620                         }
2621                     }
2622                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_BIDIR_I, pb, pb2, tex_pb,
2623                                  &dmin, &next_block, 0, 0);
2624                 }
2625                 if(mb_type&CANDIDATE_MB_TYPE_INTRA){
2626                     s->mv_dir = 0;
2627                     s->mv_type = MV_TYPE_16X16;
2628                     s->mb_intra= 1;
2629                     s->mv[0][0][0] = 0;
2630                     s->mv[0][0][1] = 0;
2631                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_INTRA, pb, pb2, tex_pb,
2632                                  &dmin, &next_block, 0, 0);
2633                     if(s->h263_pred || s->h263_aic){
2634                         if(best_s.mb_intra)
2635                             s->mbintra_table[mb_x + mb_y*s->mb_stride]=1;
2636                         else
2637                             ff_clean_intra_table_entries(s); //old mode?
2638                     }
2639                 }
2640
2641                 if ((s->mpv_flags & FF_MPV_FLAG_QP_RD) && dmin < INT_MAX) {
2642                     if(best_s.mv_type==MV_TYPE_16X16){ //FIXME move 4mv after QPRD
2643                         const int last_qp= backup_s.qscale;
2644                         int qpi, qp, dc[6];
2645                         int16_t ac[6][16];
2646                         const int mvdir= (best_s.mv_dir&MV_DIR_BACKWARD) ? 1 : 0;
2647                         static const int dquant_tab[4]={-1,1,-2,2};
2648
2649                         assert(backup_s.dquant == 0);
2650
2651                         //FIXME intra
2652                         s->mv_dir= best_s.mv_dir;
2653                         s->mv_type = MV_TYPE_16X16;
2654                         s->mb_intra= best_s.mb_intra;
2655                         s->mv[0][0][0] = best_s.mv[0][0][0];
2656                         s->mv[0][0][1] = best_s.mv[0][0][1];
2657                         s->mv[1][0][0] = best_s.mv[1][0][0];
2658                         s->mv[1][0][1] = best_s.mv[1][0][1];
2659
2660                         qpi = s->pict_type == AV_PICTURE_TYPE_B ? 2 : 0;
2661                         for(; qpi<4; qpi++){
2662                             int dquant= dquant_tab[qpi];
2663                             qp= last_qp + dquant;
2664                             if(qp < s->avctx->qmin || qp > s->avctx->qmax)
2665                                 continue;
2666                             backup_s.dquant= dquant;
2667                             if(s->mb_intra && s->dc_val[0]){
2668                                 for(i=0; i<6; i++){
2669                                     dc[i]= s->dc_val[0][ s->block_index[i] ];
2670                                     memcpy(ac[i], s->ac_val[0][s->block_index[i]], sizeof(int16_t)*16);
2671                                 }
2672                             }
2673
2674                             encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_INTER /* wrong but unused */, pb, pb2, tex_pb,
2675                                          &dmin, &next_block, s->mv[mvdir][0][0], s->mv[mvdir][0][1]);
2676                             if(best_s.qscale != qp){
2677                                 if(s->mb_intra && s->dc_val[0]){
2678                                     for(i=0; i<6; i++){
2679                                         s->dc_val[0][ s->block_index[i] ]= dc[i];
2680                                         memcpy(s->ac_val[0][s->block_index[i]], ac[i], sizeof(int16_t)*16);
2681                                     }
2682                                 }
2683                             }
2684                         }
2685                     }
2686                 }
2687                 if(CONFIG_MPEG4_ENCODER && mb_type&CANDIDATE_MB_TYPE_DIRECT){
2688                     int mx= s->b_direct_mv_table[xy][0];
2689                     int my= s->b_direct_mv_table[xy][1];
2690
2691                     backup_s.dquant = 0;
2692                     s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
2693                     s->mb_intra= 0;
2694                     ff_mpeg4_set_direct_mv(s, mx, my);
2695                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_DIRECT, pb, pb2, tex_pb,
2696                                  &dmin, &next_block, mx, my);
2697                 }
2698                 if(CONFIG_MPEG4_ENCODER && mb_type&CANDIDATE_MB_TYPE_DIRECT0){
2699                     backup_s.dquant = 0;
2700                     s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
2701                     s->mb_intra= 0;
2702                     ff_mpeg4_set_direct_mv(s, 0, 0);
2703                     encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_DIRECT, pb, pb2, tex_pb,
2704                                  &dmin, &next_block, 0, 0);
2705                 }
2706                 if (!best_s.mb_intra && s->mpv_flags & FF_MPV_FLAG_SKIP_RD) {
2707                     int coded=0;
2708                     for(i=0; i<6; i++)
2709                         coded |= s->block_last_index[i];
2710                     if(coded){
2711                         int mx,my;
2712                         memcpy(s->mv, best_s.mv, sizeof(s->mv));
2713                         if(CONFIG_MPEG4_ENCODER && best_s.mv_dir & MV_DIRECT){
2714                             mx=my=0; //FIXME find the one we actually used
2715                             ff_mpeg4_set_direct_mv(s, mx, my);
2716                         }else if(best_s.mv_dir&MV_DIR_BACKWARD){
2717                             mx= s->mv[1][0][0];
2718                             my= s->mv[1][0][1];
2719                         }else{
2720                             mx= s->mv[0][0][0];
2721                             my= s->mv[0][0][1];
2722                         }
2723
2724                         s->mv_dir= best_s.mv_dir;
2725                         s->mv_type = best_s.mv_type;
2726                         s->mb_intra= 0;
2727 /*                        s->mv[0][0][0] = best_s.mv[0][0][0];
2728                         s->mv[0][0][1] = best_s.mv[0][0][1];
2729                         s->mv[1][0][0] = best_s.mv[1][0][0];
2730                         s->mv[1][0][1] = best_s.mv[1][0][1];*/
2731                         backup_s.dquant= 0;
2732                         s->skipdct=1;
2733                         encode_mb_hq(s, &backup_s, &best_s, CANDIDATE_MB_TYPE_INTER /* wrong but unused */, pb, pb2, tex_pb,
2734                                         &dmin, &next_block, mx, my);
2735                         s->skipdct=0;
2736                     }
2737                 }
2738
2739                 s->current_picture.qscale_table[xy] = best_s.qscale;
2740
2741                 copy_context_after_encode(s, &best_s, -1);
2742
2743                 pb_bits_count= put_bits_count(&s->pb);
2744                 flush_put_bits(&s->pb);
2745                 avpriv_copy_bits(&backup_s.pb, bit_buf[next_block^1], pb_bits_count);
2746                 s->pb= backup_s.pb;
2747
2748                 if(s->data_partitioning){
2749                     pb2_bits_count= put_bits_count(&s->pb2);
2750                     flush_put_bits(&s->pb2);
2751                     avpriv_copy_bits(&backup_s.pb2, bit_buf2[next_block^1], pb2_bits_count);
2752                     s->pb2= backup_s.pb2;
2753
2754                     tex_pb_bits_count= put_bits_count(&s->tex_pb);
2755                     flush_put_bits(&s->tex_pb);
2756                     avpriv_copy_bits(&backup_s.tex_pb, bit_buf_tex[next_block^1], tex_pb_bits_count);
2757                     s->tex_pb= backup_s.tex_pb;
2758                 }
2759                 s->last_bits= put_bits_count(&s->pb);
2760
2761                 if (CONFIG_H263_ENCODER &&
2762                     s->out_format == FMT_H263 && s->pict_type!=AV_PICTURE_TYPE_B)
2763                     ff_h263_update_motion_val(s);
2764
2765                 if(next_block==0){ //FIXME 16 vs linesize16
2766                     s->hdsp.put_pixels_tab[0][0](s->dest[0], s->rd_scratchpad                     , s->linesize  ,16);
2767                     s->hdsp.put_pixels_tab[1][0](s->dest[1], s->rd_scratchpad + 16*s->linesize    , s->uvlinesize, 8);
2768                     s->hdsp.put_pixels_tab[1][0](s->dest[2], s->rd_scratchpad + 16*s->linesize + 8, s->uvlinesize, 8);
2769                 }
2770
2771                 if(s->avctx->mb_decision == FF_MB_DECISION_BITS)
2772                     ff_MPV_decode_mb(s, s->block);
2773             } else {
2774                 int motion_x = 0, motion_y = 0;
2775                 s->mv_type=MV_TYPE_16X16;
2776                 // only one MB-Type possible
2777
2778                 switch(mb_type){
2779                 case CANDIDATE_MB_TYPE_INTRA:
2780                     s->mv_dir = 0;
2781                     s->mb_intra= 1;
2782                     motion_x= s->mv[0][0][0] = 0;
2783                     motion_y= s->mv[0][0][1] = 0;
2784                     break;
2785                 case CANDIDATE_MB_TYPE_INTER:
2786                     s->mv_dir = MV_DIR_FORWARD;
2787                     s->mb_intra= 0;
2788                     motion_x= s->mv[0][0][0] = s->p_mv_table[xy][0];
2789                     motion_y= s->mv[0][0][1] = s->p_mv_table[xy][1];
2790                     break;
2791                 case CANDIDATE_MB_TYPE_INTER_I:
2792                     s->mv_dir = MV_DIR_FORWARD;
2793                     s->mv_type = MV_TYPE_FIELD;
2794                     s->mb_intra= 0;
2795                     for(i=0; i<2; i++){
2796                         j= s->field_select[0][i] = s->p_field_select_table[i][xy];
2797                         s->mv[0][i][0] = s->p_field_mv_table[i][j][xy][0];
2798                         s->mv[0][i][1] = s->p_field_mv_table[i][j][xy][1];
2799                     }
2800                     break;
2801                 case CANDIDATE_MB_TYPE_INTER4V:
2802                     s->mv_dir = MV_DIR_FORWARD;
2803                     s->mv_type = MV_TYPE_8X8;
2804                     s->mb_intra= 0;
2805                     for(i=0; i<4; i++){
2806                         s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0];
2807                         s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1];
2808                     }
2809                     break;
2810                 case CANDIDATE_MB_TYPE_DIRECT:
2811                     if (CONFIG_MPEG4_ENCODER) {
2812                         s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD|MV_DIRECT;
2813                         s->mb_intra= 0;
2814                         motion_x=s->b_direct_mv_table[xy][0];
2815                         motion_y=s->b_direct_mv_table[xy][1];
2816                         ff_mpeg4_set_direct_mv(s, motion_x, motion_y);
2817                     }
2818                     break;
2819                 case CANDIDATE_MB_TYPE_DIRECT0:
2820                     if (CONFIG_MPEG4_ENCODER) {
2821                         s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD|MV_DIRECT;
2822                         s->mb_intra= 0;
2823                         ff_mpeg4_set_direct_mv(s, 0, 0);
2824                     }
2825                     break;
2826                 case CANDIDATE_MB_TYPE_BIDIR:
2827                     s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
2828                     s->mb_intra= 0;
2829                     s->mv[0][0][0] = s->b_bidir_forw_mv_table[xy][0];
2830                     s->mv[0][0][1] = s->b_bidir_forw_mv_table[xy][1];
2831                     s->mv[1][0][0] = s->b_bidir_back_mv_table[xy][0];
2832                     s->mv[1][0][1] = s->b_bidir_back_mv_table[xy][1];
2833                     break;
2834                 case CANDIDATE_MB_TYPE_BACKWARD:
2835                     s->mv_dir = MV_DIR_BACKWARD;
2836                     s->mb_intra= 0;
2837                     motion_x= s->mv[1][0][0] = s->b_back_mv_table[xy][0];
2838                     motion_y= s->mv[1][0][1] = s->b_back_mv_table[xy][1];
2839                     break;
2840                 case CANDIDATE_MB_TYPE_FORWARD:
2841                     s->mv_dir = MV_DIR_FORWARD;
2842                     s->mb_intra= 0;
2843                     motion_x= s->mv[0][0][0] = s->b_forw_mv_table[xy][0];
2844                     motion_y= s->mv[0][0][1] = s->b_forw_mv_table[xy][1];
2845                     break;
2846                 case CANDIDATE_MB_TYPE_FORWARD_I:
2847                     s->mv_dir = MV_DIR_FORWARD;
2848                     s->mv_type = MV_TYPE_FIELD;
2849                     s->mb_intra= 0;
2850                     for(i=0; i<2; i++){
2851                         j= s->field_select[0][i] = s->b_field_select_table[0][i][xy];
2852                         s->mv[0][i][0] = s->b_field_mv_table[0][i][j][xy][0];
2853                         s->mv[0][i][1] = s->b_field_mv_table[0][i][j][xy][1];
2854                     }
2855                     break;
2856                 case CANDIDATE_MB_TYPE_BACKWARD_I:
2857                     s->mv_dir = MV_DIR_BACKWARD;
2858                     s->mv_type = MV_TYPE_FIELD;
2859                     s->mb_intra= 0;
2860                     for(i=0; i<2; i++){
2861                         j= s->field_select[1][i] = s->b_field_select_table[1][i][xy];
2862                         s->mv[1][i][0] = s->b_field_mv_table[1][i][j][xy][0];
2863                         s->mv[1][i][1] = s->b_field_mv_table[1][i][j][xy][1];
2864                     }
2865                     break;
2866                 case CANDIDATE_MB_TYPE_BIDIR_I:
2867                     s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
2868                     s->mv_type = MV_TYPE_FIELD;
2869                     s->mb_intra= 0;
2870                     for(dir=0; dir<2; dir++){
2871                         for(i=0; i<2; i++){
2872                             j= s->field_select[dir][i] = s->b_field_select_table[dir][i][xy];
2873                             s->mv[dir][i][0] = s->b_field_mv_table[dir][i][j][xy][0];
2874                             s->mv[dir][i][1] = s->b_field_mv_table[dir][i][j][xy][1];
2875                         }
2876                     }
2877                     break;
2878                 default:
2879                     av_log(s->avctx, AV_LOG_ERROR, "illegal MB type\n");
2880                 }
2881
2882                 encode_mb(s, motion_x, motion_y);
2883
2884                 // RAL: Update last macroblock type
2885                 s->last_mv_dir = s->mv_dir;
2886
2887                 if (CONFIG_H263_ENCODER &&
2888                     s->out_format == FMT_H263 && s->pict_type!=AV_PICTURE_TYPE_B)
2889                     ff_h263_update_motion_val(s);
2890
2891                 ff_MPV_decode_mb(s, s->block);
2892             }
2893
2894             /* clean the MV table in IPS frames for direct mode in B frames */
2895             if(s->mb_intra /* && I,P,S_TYPE */){
2896                 s->p_mv_table[xy][0]=0;
2897                 s->p_mv_table[xy][1]=0;
2898             }
2899
2900             if(s->flags&CODEC_FLAG_PSNR){
2901                 int w= 16;
2902                 int h= 16;
2903
2904                 if(s->mb_x*16 + 16 > s->width ) w= s->width - s->mb_x*16;
2905                 if(s->mb_y*16 + 16 > s->height) h= s->height- s->mb_y*16;
2906
2907                 s->current_picture.f.error[0] += sse(
2908                     s, s->new_picture.f.data[0] + s->mb_x*16 + s->mb_y*s->linesize*16,
2909                     s->dest[0], w, h, s->linesize);
2910                 s->current_picture.f.error[1] += sse(
2911                     s, s->new_picture.f.data[1] + s->mb_x*8  + s->mb_y*s->uvlinesize*chr_h,
2912                     s->dest[1], w>>1, h>>s->chroma_y_shift, s->uvlinesize);
2913                 s->current_picture.f.error[2] += sse(
2914                     s, s->new_picture.f.data[2] + s->mb_x*8  + s->mb_y*s->uvlinesize*chr_h,
2915                     s->dest[2], w>>1, h>>s->chroma_y_shift, s->uvlinesize);
2916             }
2917             if(s->loop_filter){
2918                 if(CONFIG_H263_ENCODER && s->out_format == FMT_H263)
2919                     ff_h263_loop_filter(s);
2920             }
2921             av_dlog(s->avctx, "MB %d %d bits\n",
2922                     s->mb_x + s->mb_y * s->mb_stride, put_bits_count(&s->pb));
2923         }
2924     }
2925
2926     //not beautiful here but we must write it before flushing so it has to be here
2927     if (CONFIG_MSMPEG4_ENCODER && s->msmpeg4_version && s->msmpeg4_version<4 && s->pict_type == AV_PICTURE_TYPE_I)
2928         ff_msmpeg4_encode_ext_header(s);
2929
2930     write_slice_end(s);
2931
2932     /* Send the last GOB if RTP */
2933     if (s->avctx->rtp_callback) {
2934         int number_mb = (mb_y - s->resync_mb_y)*s->mb_width - s->resync_mb_x;
2935         pdif = put_bits_ptr(&s->pb) - s->ptr_lastgob;
2936         /* Call the RTP callback to send the last GOB */
2937         emms_c();
2938         s->avctx->rtp_callback(s->avctx, s->ptr_lastgob, pdif, number_mb);
2939     }
2940
2941     return 0;
2942 }
2943
2944 #define MERGE(field) dst->field += src->field; src->field=0
2945 static void merge_context_after_me(MpegEncContext *dst, MpegEncContext *src){
2946     MERGE(me.scene_change_score);
2947     MERGE(me.mc_mb_var_sum_temp);
2948     MERGE(me.mb_var_sum_temp);
2949 }
2950
2951 static void merge_context_after_encode(MpegEncContext *dst, MpegEncContext *src){
2952     int i;
2953
2954     MERGE(dct_count[0]); //note, the other dct vars are not part of the context
2955     MERGE(dct_count[1]);
2956     MERGE(mv_bits);
2957     MERGE(i_tex_bits);
2958     MERGE(p_tex_bits);
2959     MERGE(i_count);
2960     MERGE(f_count);
2961     MERGE(b_count);
2962     MERGE(skip_count);
2963     MERGE(misc_bits);
2964     MERGE(er.error_count);
2965     MERGE(padding_bug_score);
2966     MERGE(current_picture.f.error[0]);
2967     MERGE(current_picture.f.error[1]);
2968     MERGE(current_picture.f.error[2]);
2969
2970     if(dst->avctx->noise_reduction){
2971         for(i=0; i<64; i++){
2972             MERGE(dct_error_sum[0][i]);
2973             MERGE(dct_error_sum[1][i]);
2974         }
2975     }
2976
2977     assert(put_bits_count(&src->pb) % 8 ==0);
2978     assert(put_bits_count(&dst->pb) % 8 ==0);
2979     avpriv_copy_bits(&dst->pb, src->pb.buf, put_bits_count(&src->pb));
2980     flush_put_bits(&dst->pb);
2981 }
2982
2983 static int estimate_qp(MpegEncContext *s, int dry_run){
2984     if (s->next_lambda){
2985         s->current_picture_ptr->f.quality =
2986         s->current_picture.f.quality = s->next_lambda;
2987         if(!dry_run) s->next_lambda= 0;
2988     } else if (!s->fixed_qscale) {
2989         s->current_picture_ptr->f.quality =
2990         s->current_picture.f.quality = ff_rate_estimate_qscale(s, dry_run);
2991         if (s->current_picture.f.quality < 0)
2992             return -1;
2993     }
2994
2995     if(s->adaptive_quant){
2996         switch(s->codec_id){
2997         case AV_CODEC_ID_MPEG4:
2998             if (CONFIG_MPEG4_ENCODER)
2999                 ff_clean_mpeg4_qscales(s);
3000             break;
3001         case AV_CODEC_ID_H263:
3002         case AV_CODEC_ID_H263P:
3003         case AV_CODEC_ID_FLV1:
3004             if (CONFIG_H263_ENCODER)
3005                 ff_clean_h263_qscales(s);
3006             break;
3007         default:
3008             ff_init_qscale_tab(s);
3009         }
3010
3011         s->lambda= s->lambda_table[0];
3012         //FIXME broken
3013     }else
3014         s->lambda = s->current_picture.f.quality;
3015     update_qscale(s);
3016     return 0;
3017 }
3018
3019 /* must be called before writing the header */
3020 static void set_frame_distances(MpegEncContext * s){
3021     assert(s->current_picture_ptr->f.pts != AV_NOPTS_VALUE);
3022     s->time = s->current_picture_ptr->f.pts * s->avctx->time_base.num;
3023
3024     if(s->pict_type==AV_PICTURE_TYPE_B){
3025         s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
3026         assert(s->pb_time > 0 && s->pb_time < s->pp_time);
3027     }else{
3028         s->pp_time= s->time - s->last_non_b_time;
3029         s->last_non_b_time= s->time;
3030         assert(s->picture_number==0 || s->pp_time > 0);
3031     }
3032 }
3033
3034 static int encode_picture(MpegEncContext *s, int picture_number)
3035 {
3036     int i, ret;
3037     int bits;
3038     int context_count = s->slice_context_count;
3039
3040     s->picture_number = picture_number;
3041
3042     /* Reset the average MB variance */
3043     s->me.mb_var_sum_temp    =
3044     s->me.mc_mb_var_sum_temp = 0;
3045
3046     /* we need to initialize some time vars before we can encode b-frames */
3047     // RAL: Condition added for MPEG1VIDEO
3048     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || s->codec_id == AV_CODEC_ID_MPEG2VIDEO || (s->h263_pred && !s->msmpeg4_version))
3049         set_frame_distances(s);
3050     if(CONFIG_MPEG4_ENCODER && s->codec_id == AV_CODEC_ID_MPEG4)
3051         ff_set_mpeg4_time(s);
3052
3053     s->me.scene_change_score=0;
3054
3055 //    s->lambda= s->current_picture_ptr->quality; //FIXME qscale / ... stuff for ME rate distortion
3056
3057     if(s->pict_type==AV_PICTURE_TYPE_I){
3058         if(s->msmpeg4_version >= 3) s->no_rounding=1;
3059         else                        s->no_rounding=0;
3060     }else if(s->pict_type!=AV_PICTURE_TYPE_B){
3061         if(s->flipflop_rounding || s->codec_id == AV_CODEC_ID_H263P || s->codec_id == AV_CODEC_ID_MPEG4)
3062             s->no_rounding ^= 1;
3063     }
3064
3065     if(s->flags & CODEC_FLAG_PASS2){
3066         if (estimate_qp(s,1) < 0)
3067             return -1;
3068         ff_get_2pass_fcode(s);
3069     }else if(!(s->flags & CODEC_FLAG_QSCALE)){
3070         if(s->pict_type==AV_PICTURE_TYPE_B)
3071             s->lambda= s->last_lambda_for[s->pict_type];
3072         else
3073             s->lambda= s->last_lambda_for[s->last_non_b_pict_type];
3074         update_qscale(s);
3075     }
3076
3077     s->mb_intra=0; //for the rate distortion & bit compare functions
3078     for(i=1; i<context_count; i++){
3079         ret = ff_update_duplicate_context(s->thread_context[i], s);
3080         if (ret < 0)
3081             return ret;
3082     }
3083
3084     if(ff_init_me(s)<0)
3085         return -1;
3086
3087     /* Estimate motion for every MB */
3088     if(s->pict_type != AV_PICTURE_TYPE_I){
3089         s->lambda = (s->lambda * s->avctx->me_penalty_compensation + 128)>>8;
3090         s->lambda2= (s->lambda2* (int64_t)s->avctx->me_penalty_compensation + 128)>>8;
3091         if (s->pict_type != AV_PICTURE_TYPE_B) {
3092             if((s->avctx->pre_me && s->last_non_b_pict_type==AV_PICTURE_TYPE_I) || s->avctx->pre_me==2){
3093                 s->avctx->execute(s->avctx, pre_estimate_motion_thread, &s->thread_context[0], NULL, context_count, sizeof(void*));
3094             }
3095         }
3096
3097         s->avctx->execute(s->avctx, estimate_motion_thread, &s->thread_context[0], NULL, context_count, sizeof(void*));
3098     }else /* if(s->pict_type == AV_PICTURE_TYPE_I) */{
3099         /* I-Frame */
3100         for(i=0; i<s->mb_stride*s->mb_height; i++)
3101             s->mb_type[i]= CANDIDATE_MB_TYPE_INTRA;
3102
3103         if(!s->fixed_qscale){
3104             /* finding spatial complexity for I-frame rate control */
3105             s->avctx->execute(s->avctx, mb_var_thread, &s->thread_context[0], NULL, context_count, sizeof(void*));
3106         }
3107     }
3108     for(i=1; i<context_count; i++){
3109         merge_context_after_me(s, s->thread_context[i]);
3110     }
3111     s->current_picture.mc_mb_var_sum= s->current_picture_ptr->mc_mb_var_sum= s->me.mc_mb_var_sum_temp;
3112     s->current_picture.   mb_var_sum= s->current_picture_ptr->   mb_var_sum= s->me.   mb_var_sum_temp;
3113     emms_c();
3114
3115     if(s->me.scene_change_score > s->avctx->scenechange_threshold && s->pict_type == AV_PICTURE_TYPE_P){
3116         s->pict_type= AV_PICTURE_TYPE_I;
3117         for(i=0; i<s->mb_stride*s->mb_height; i++)
3118             s->mb_type[i]= CANDIDATE_MB_TYPE_INTRA;
3119         av_dlog(s, "Scene change detected, encoding as I Frame %d %d\n",
3120                 s->current_picture.mb_var_sum, s->current_picture.mc_mb_var_sum);
3121     }
3122
3123     if(!s->umvplus){
3124         if(s->pict_type==AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) {
3125             s->f_code= ff_get_best_fcode(s, s->p_mv_table, CANDIDATE_MB_TYPE_INTER);
3126
3127             if(s->flags & CODEC_FLAG_INTERLACED_ME){
3128                 int a,b;
3129                 a= ff_get_best_fcode(s, s->p_field_mv_table[0][0], CANDIDATE_MB_TYPE_INTER_I); //FIXME field_select
3130                 b= ff_get_best_fcode(s, s->p_field_mv_table[1][1], CANDIDATE_MB_TYPE_INTER_I);
3131                 s->f_code= FFMAX3(s->f_code, a, b);
3132             }
3133
3134             ff_fix_long_p_mvs(s);
3135             ff_fix_long_mvs(s, NULL, 0, s->p_mv_table, s->f_code, CANDIDATE_MB_TYPE_INTER, 0);
3136             if(s->flags & CODEC_FLAG_INTERLACED_ME){
3137                 int j;
3138                 for(i=0; i<2; i++){
3139                     for(j=0; j<2; j++)
3140                         ff_fix_long_mvs(s, s->p_field_select_table[i], j,
3141                                         s->p_field_mv_table[i][j], s->f_code, CANDIDATE_MB_TYPE_INTER_I, 0);
3142                 }
3143             }
3144         }
3145
3146         if(s->pict_type==AV_PICTURE_TYPE_B){
3147             int a, b;
3148
3149             a = ff_get_best_fcode(s, s->b_forw_mv_table, CANDIDATE_MB_TYPE_FORWARD);
3150             b = ff_get_best_fcode(s, s->b_bidir_forw_mv_table, CANDIDATE_MB_TYPE_BIDIR);
3151             s->f_code = FFMAX(a, b);
3152
3153             a = ff_get_best_fcode(s, s->b_back_mv_table, CANDIDATE_MB_TYPE_BACKWARD);
3154             b = ff_get_best_fcode(s, s->b_bidir_back_mv_table, CANDIDATE_MB_TYPE_BIDIR);
3155             s->b_code = FFMAX(a, b);
3156
3157             ff_fix_long_mvs(s, NULL, 0, s->b_forw_mv_table, s->f_code, CANDIDATE_MB_TYPE_FORWARD, 1);
3158             ff_fix_long_mvs(s, NULL, 0, s->b_back_mv_table, s->b_code, CANDIDATE_MB_TYPE_BACKWARD, 1);
3159             ff_fix_long_mvs(s, NULL, 0, s->b_bidir_forw_mv_table, s->f_code, CANDIDATE_MB_TYPE_BIDIR, 1);
3160             ff_fix_long_mvs(s, NULL, 0, s->b_bidir_back_mv_table, s->b_code, CANDIDATE_MB_TYPE_BIDIR, 1);
3161             if(s->flags & CODEC_FLAG_INTERLACED_ME){
3162                 int dir, j;
3163                 for(dir=0; dir<2; dir++){
3164                     for(i=0; i<2; i++){
3165                         for(j=0; j<2; j++){
3166                             int type= dir ? (CANDIDATE_MB_TYPE_BACKWARD_I|CANDIDATE_MB_TYPE_BIDIR_I)
3167                                           : (CANDIDATE_MB_TYPE_FORWARD_I |CANDIDATE_MB_TYPE_BIDIR_I);
3168                             ff_fix_long_mvs(s, s->b_field_select_table[dir][i], j,
3169                                             s->b_field_mv_table[dir][i][j], dir ? s->b_code : s->f_code, type, 1);
3170                         }
3171                     }
3172                 }
3173             }
3174         }
3175     }
3176
3177     if (estimate_qp(s, 0) < 0)
3178         return -1;
3179
3180     if(s->qscale < 3 && s->max_qcoeff<=128 && s->pict_type==AV_PICTURE_TYPE_I && !(s->flags & CODEC_FLAG_QSCALE))
3181         s->qscale= 3; //reduce clipping problems
3182
3183     if (s->out_format == FMT_MJPEG) {
3184         /* for mjpeg, we do include qscale in the matrix */
3185         for(i=1;i<64;i++){
3186             int j= s->dsp.idct_permutation[i];
3187
3188             s->intra_matrix[j] = av_clip_uint8((ff_mpeg1_default_intra_matrix[i] * s->qscale) >> 3);
3189         }
3190         s->y_dc_scale_table=
3191         s->c_dc_scale_table= ff_mpeg2_dc_scale_table[s->intra_dc_precision];
3192         s->intra_matrix[0] = ff_mpeg2_dc_scale_table[s->intra_dc_precision][8];
3193         ff_convert_matrix(&s->dsp, s->q_intra_matrix, s->q_intra_matrix16,
3194                        s->intra_matrix, s->intra_quant_bias, 8, 8, 1);
3195         s->qscale= 8;
3196     }
3197
3198     //FIXME var duplication
3199     s->current_picture_ptr->f.key_frame =
3200     s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I; //FIXME pic_ptr
3201     s->current_picture_ptr->f.pict_type =
3202     s->current_picture.f.pict_type = s->pict_type;
3203
3204     if (s->current_picture.f.key_frame)
3205         s->picture_in_gop_number=0;
3206
3207     s->last_bits= put_bits_count(&s->pb);
3208     switch(s->out_format) {
3209     case FMT_MJPEG:
3210         if (CONFIG_MJPEG_ENCODER)
3211             ff_mjpeg_encode_picture_header(s);
3212         break;
3213     case FMT_H261:
3214         if (CONFIG_H261_ENCODER)
3215             ff_h261_encode_picture_header(s, picture_number);
3216         break;
3217     case FMT_H263:
3218         if (CONFIG_WMV2_ENCODER && s->codec_id == AV_CODEC_ID_WMV2)
3219             ff_wmv2_encode_picture_header(s, picture_number);
3220         else if (CONFIG_MSMPEG4_ENCODER && s->msmpeg4_version)
3221             ff_msmpeg4_encode_picture_header(s, picture_number);
3222         else if (CONFIG_MPEG4_ENCODER && s->h263_pred)
3223             ff_mpeg4_encode_picture_header(s, picture_number);
3224         else if (CONFIG_RV10_ENCODER && s->codec_id == AV_CODEC_ID_RV10)
3225             ff_rv10_encode_picture_header(s, picture_number);
3226         else if (CONFIG_RV20_ENCODER && s->codec_id == AV_CODEC_ID_RV20)
3227             ff_rv20_encode_picture_header(s, picture_number);
3228         else if (CONFIG_FLV_ENCODER && s->codec_id == AV_CODEC_ID_FLV1)
3229             ff_flv_encode_picture_header(s, picture_number);
3230         else if (CONFIG_H263_ENCODER)
3231             ff_h263_encode_picture_header(s, picture_number);
3232         break;
3233     case FMT_MPEG1:
3234         if (CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER)
3235             ff_mpeg1_encode_picture_header(s, picture_number);
3236         break;
3237     default:
3238         assert(0);
3239     }
3240     bits= put_bits_count(&s->pb);
3241     s->header_bits= bits - s->last_bits;
3242
3243     for(i=1; i<context_count; i++){
3244         update_duplicate_context_after_me(s->thread_context[i], s);
3245     }
3246     s->avctx->execute(s->avctx, encode_thread, &s->thread_context[0], NULL, context_count, sizeof(void*));
3247     for(i=1; i<context_count; i++){
3248         merge_context_after_encode(s, s->thread_context[i]);
3249     }
3250     emms_c();
3251     return 0;
3252 }
3253
3254 static void denoise_dct_c(MpegEncContext *s, int16_t *block){
3255     const int intra= s->mb_intra;
3256     int i;
3257
3258     s->dct_count[intra]++;
3259
3260     for(i=0; i<64; i++){
3261         int level= block[i];
3262
3263         if(level){
3264             if(level>0){
3265                 s->dct_error_sum[intra][i] += level;
3266                 level -= s->dct_offset[intra][i];
3267                 if(level<0) level=0;
3268             }else{
3269                 s->dct_error_sum[intra][i] -= level;
3270                 level += s->dct_offset[intra][i];
3271                 if(level>0) level=0;
3272             }
3273             block[i]= level;
3274         }
3275     }
3276 }
3277
3278 static int dct_quantize_trellis_c(MpegEncContext *s,
3279                                   int16_t *block, int n,
3280                                   int qscale, int *overflow){
3281     const int *qmat;
3282     const uint8_t *scantable= s->intra_scantable.scantable;
3283     const uint8_t *perm_scantable= s->intra_scantable.permutated;
3284     int max=0;
3285     unsigned int threshold1, threshold2;
3286     int bias=0;
3287     int run_tab[65];
3288     int level_tab[65];
3289     int score_tab[65];
3290     int survivor[65];
3291     int survivor_count;
3292     int last_run=0;
3293     int last_level=0;
3294     int last_score= 0;
3295     int last_i;
3296     int coeff[2][64];
3297     int coeff_count[64];
3298     int qmul, qadd, start_i, last_non_zero, i, dc;
3299     const int esc_length= s->ac_esc_length;
3300     uint8_t * length;
3301     uint8_t * last_length;
3302     const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
3303
3304     s->dsp.fdct (block);
3305
3306     if(s->dct_error_sum)
3307         s->denoise_dct(s, block);
3308     qmul= qscale*16;
3309     qadd= ((qscale-1)|1)*8;
3310
3311     if (s->mb_intra) {
3312         int q;
3313         if (!s->h263_aic) {
3314             if (n < 4)
3315                 q = s->y_dc_scale;
3316             else
3317                 q = s->c_dc_scale;
3318             q = q << 3;
3319         } else{
3320             /* For AIC we skip quant/dequant of INTRADC */
3321             q = 1 << 3;
3322             qadd=0;
3323         }
3324
3325         /* note: block[0] is assumed to be positive */
3326         block[0] = (block[0] + (q >> 1)) / q;
3327         start_i = 1;
3328         last_non_zero = 0;
3329         qmat = s->q_intra_matrix[qscale];
3330         if(s->mpeg_quant || s->out_format == FMT_MPEG1)
3331             bias= 1<<(QMAT_SHIFT-1);
3332         length     = s->intra_ac_vlc_length;
3333         last_length= s->intra_ac_vlc_last_length;
3334     } else {
3335         start_i = 0;
3336         last_non_zero = -1;
3337         qmat = s->q_inter_matrix[qscale];
3338         length     = s->inter_ac_vlc_length;
3339         last_length= s->inter_ac_vlc_last_length;
3340     }
3341     last_i= start_i;
3342
3343     threshold1= (1<<QMAT_SHIFT) - bias - 1;
3344     threshold2= (threshold1<<1);
3345
3346     for(i=63; i>=start_i; i--) {
3347         const int j = scantable[i];
3348         int level = block[j] * qmat[j];
3349
3350         if(((unsigned)(level+threshold1))>threshold2){
3351             last_non_zero = i;
3352             break;
3353         }
3354     }
3355
3356     for(i=start_i; i<=last_non_zero; i++) {
3357         const int j = scantable[i];
3358         int level = block[j] * qmat[j];
3359
3360 //        if(   bias+level >= (1<<(QMAT_SHIFT - 3))
3361 //           || bias-level >= (1<<(QMAT_SHIFT - 3))){
3362         if(((unsigned)(level+threshold1))>threshold2){
3363             if(level>0){
3364                 level= (bias + level)>>QMAT_SHIFT;
3365                 coeff[0][i]= level;
3366                 coeff[1][i]= level-1;
3367 //                coeff[2][k]= level-2;
3368             }else{
3369                 level= (bias - level)>>QMAT_SHIFT;
3370                 coeff[0][i]= -level;
3371                 coeff[1][i]= -level+1;
3372 //                coeff[2][k]= -level+2;
3373             }
3374             coeff_count[i]= FFMIN(level, 2);
3375             assert(coeff_count[i]);
3376             max |=level;
3377         }else{
3378             coeff[0][i]= (level>>31)|1;
3379             coeff_count[i]= 1;
3380         }
3381     }
3382
3383     *overflow= s->max_qcoeff < max; //overflow might have happened
3384
3385     if(last_non_zero < start_i){
3386         memset(block + start_i, 0, (64-start_i)*sizeof(int16_t));
3387         return last_non_zero;
3388     }
3389
3390     score_tab[start_i]= 0;
3391     survivor[0]= start_i;
3392     survivor_count= 1;
3393
3394     for(i=start_i; i<=last_non_zero; i++){
3395         int level_index, j, zero_distortion;
3396         int dct_coeff= FFABS(block[ scantable[i] ]);
3397         int best_score=256*256*256*120;
3398
3399         if (s->dsp.fdct == ff_fdct_ifast)
3400             dct_coeff= (dct_coeff*ff_inv_aanscales[ scantable[i] ]) >> 12;
3401         zero_distortion= dct_coeff*dct_coeff;
3402
3403         for(level_index=0; level_index < coeff_count[i]; level_index++){
3404             int distortion;
3405             int level= coeff[level_index][i];
3406             const int alevel= FFABS(level);
3407             int unquant_coeff;
3408
3409             assert(level);
3410
3411             if(s->out_format == FMT_H263){
3412                 unquant_coeff= alevel*qmul + qadd;
3413             }else{ //MPEG1
3414                 j= s->dsp.idct_permutation[ scantable[i] ]; //FIXME optimize
3415                 if(s->mb_intra){
3416                         unquant_coeff = (int)(  alevel  * qscale * s->intra_matrix[j]) >> 3;
3417                         unquant_coeff =   (unquant_coeff - 1) | 1;
3418                 }else{
3419                         unquant_coeff = (((  alevel  << 1) + 1) * qscale * ((int) s->inter_matrix[j])) >> 4;
3420                         unquant_coeff =   (unquant_coeff - 1) | 1;
3421                 }
3422                 unquant_coeff<<= 3;
3423             }
3424
3425             distortion= (unquant_coeff - dct_coeff) * (unquant_coeff - dct_coeff) - zero_distortion;
3426             level+=64;
3427             if((level&(~127)) == 0){
3428                 for(j=survivor_count-1; j>=0; j--){
3429                     int run= i - survivor[j];
3430                     int score= distortion + length[UNI_AC_ENC_INDEX(run, level)]*lambda;
3431                     score += score_tab[i-run];
3432
3433                     if(score < best_score){
3434                         best_score= score;
3435                         run_tab[i+1]= run;
3436                         level_tab[i+1]= level-64;
3437                     }
3438                 }
3439
3440                 if(s->out_format == FMT_H263){
3441                     for(j=survivor_count-1; j>=0; j--){
3442                         int run= i - survivor[j];
3443                         int score= distortion + last_length[UNI_AC_ENC_INDEX(run, level)]*lambda;
3444                         score += score_tab[i-run];
3445                         if(score < last_score){
3446                             last_score= score;
3447                             last_run= run;
3448                             last_level= level-64;
3449                             last_i= i+1;
3450                         }
3451                     }
3452                 }
3453             }else{
3454                 distortion += esc_length*lambda;
3455                 for(j=survivor_count-1; j>=0; j--){
3456                     int run= i - survivor[j];
3457                     int score= distortion + score_tab[i-run];
3458
3459                     if(score < best_score){
3460                         best_score= score;
3461                         run_tab[i+1]= run;
3462                         level_tab[i+1]= level-64;
3463                     }
3464                 }
3465
3466                 if(s->out_format == FMT_H263){
3467                   for(j=survivor_count-1; j>=0; j--){
3468                         int run= i - survivor[j];
3469                         int score= distortion + score_tab[i-run];
3470                         if(score < last_score){
3471                             last_score= score;
3472                             last_run= run;
3473                             last_level= level-64;
3474                             last_i= i+1;
3475                         }
3476                     }
3477                 }
3478             }
3479         }
3480
3481         score_tab[i+1]= best_score;
3482
3483         //Note: there is a vlc code in mpeg4 which is 1 bit shorter then another one with a shorter run and the same level
3484         if(last_non_zero <= 27){
3485             for(; survivor_count; survivor_count--){
3486                 if(score_tab[ survivor[survivor_count-1] ] <= best_score)
3487                     break;
3488             }
3489         }else{
3490             for(; survivor_count; survivor_count--){
3491                 if(score_tab[ survivor[survivor_count-1] ] <= best_score + lambda)
3492                     break;
3493             }
3494         }
3495
3496         survivor[ survivor_count++ ]= i+1;
3497     }
3498
3499     if(s->out_format != FMT_H263){
3500         last_score= 256*256*256*120;
3501         for(i= survivor[0]; i<=last_non_zero + 1; i++){
3502             int score= score_tab[i];
3503             if(i) score += lambda*2; //FIXME exacter?
3504
3505             if(score < last_score){
3506                 last_score= score;
3507                 last_i= i;
3508                 last_level= level_tab[i];
3509                 last_run= run_tab[i];
3510             }
3511         }
3512     }
3513
3514     s->coded_score[n] = last_score;
3515
3516     dc= FFABS(block[0]);
3517     last_non_zero= last_i - 1;
3518     memset(block + start_i, 0, (64-start_i)*sizeof(int16_t));
3519
3520     if(last_non_zero < start_i)
3521         return last_non_zero;
3522
3523     if(last_non_zero == 0 && start_i == 0){
3524         int best_level= 0;
3525         int best_score= dc * dc;
3526
3527         for(i=0; i<coeff_count[0]; i++){
3528             int level= coeff[i][0];
3529             int alevel= FFABS(level);
3530             int unquant_coeff, score, distortion;
3531
3532             if(s->out_format == FMT_H263){
3533                     unquant_coeff= (alevel*qmul + qadd)>>3;
3534             }else{ //MPEG1
3535                     unquant_coeff = (((  alevel  << 1) + 1) * qscale * ((int) s->inter_matrix[0])) >> 4;
3536                     unquant_coeff =   (unquant_coeff - 1) | 1;
3537             }
3538             unquant_coeff = (unquant_coeff + 4) >> 3;
3539             unquant_coeff<<= 3 + 3;
3540
3541             distortion= (unquant_coeff - dc) * (unquant_coeff - dc);
3542             level+=64;
3543             if((level&(~127)) == 0) score= distortion + last_length[UNI_AC_ENC_INDEX(0, level)]*lambda;
3544             else                    score= distortion + esc_length*lambda;
3545
3546             if(score < best_score){
3547                 best_score= score;
3548                 best_level= level - 64;
3549             }
3550         }
3551         block[0]= best_level;
3552         s->coded_score[n] = best_score - dc*dc;
3553         if(best_level == 0) return -1;
3554         else                return last_non_zero;
3555     }
3556
3557     i= last_i;
3558     assert(last_level);
3559
3560     block[ perm_scantable[last_non_zero] ]= last_level;
3561     i -= last_run + 1;
3562
3563     for(; i>start_i; i -= run_tab[i] + 1){
3564         block[ perm_scantable[i-1] ]= level_tab[i];
3565     }
3566
3567     return last_non_zero;
3568 }
3569
3570 //#define REFINE_STATS 1
3571 static int16_t basis[64][64];
3572
3573 static void build_basis(uint8_t *perm){
3574     int i, j, x, y;
3575     emms_c();
3576     for(i=0; i<8; i++){
3577         for(j=0; j<8; j++){
3578             for(y=0; y<8; y++){
3579                 for(x=0; x<8; x++){
3580                     double s= 0.25*(1<<BASIS_SHIFT);
3581                     int index= 8*i + j;
3582                     int perm_index= perm[index];
3583                     if(i==0) s*= sqrt(0.5);
3584                     if(j==0) s*= sqrt(0.5);
3585                     basis[perm_index][8*x + y]= lrintf(s * cos((M_PI/8.0)*i*(x+0.5)) * cos((M_PI/8.0)*j*(y+0.5)));
3586                 }
3587             }
3588         }
3589     }
3590 }
3591
3592 static int dct_quantize_refine(MpegEncContext *s, //FIXME breaks denoise?
3593                         int16_t *block, int16_t *weight, int16_t *orig,
3594                         int n, int qscale){
3595     int16_t rem[64];
3596     LOCAL_ALIGNED_16(int16_t, d1, [64]);
3597     const uint8_t *scantable= s->intra_scantable.scantable;
3598     const uint8_t *perm_scantable= s->intra_scantable.permutated;
3599 //    unsigned int threshold1, threshold2;
3600 //    int bias=0;
3601     int run_tab[65];
3602     int prev_run=0;
3603     int prev_level=0;
3604     int qmul, qadd, start_i, last_non_zero, i, dc;
3605     uint8_t * length;
3606     uint8_t * last_length;
3607     int lambda;
3608     int rle_index, run, q = 1, sum; //q is only used when s->mb_intra is true
3609 #ifdef REFINE_STATS
3610 static int count=0;
3611 static int after_last=0;
3612 static int to_zero=0;
3613 static int from_zero=0;
3614 static int raise=0;
3615 static int lower=0;
3616 static int messed_sign=0;
3617 #endif
3618
3619     if(basis[0][0] == 0)
3620         build_basis(s->dsp.idct_permutation);
3621
3622     qmul= qscale*2;
3623     qadd= (qscale-1)|1;
3624     if (s->mb_intra) {
3625         if (!s->h263_aic) {
3626             if (n < 4)
3627                 q = s->y_dc_scale;
3628             else
3629                 q = s->c_dc_scale;
3630         } else{
3631             /* For AIC we skip quant/dequant of INTRADC */
3632             q = 1;
3633             qadd=0;
3634         }
3635         q <<= RECON_SHIFT-3;
3636         /* note: block[0] is assumed to be positive */
3637         dc= block[0]*q;
3638 //        block[0] = (block[0] + (q >> 1)) / q;
3639         start_i = 1;
3640 //        if(s->mpeg_quant || s->out_format == FMT_MPEG1)
3641 //            bias= 1<<(QMAT_SHIFT-1);
3642         length     = s->intra_ac_vlc_length;
3643         last_length= s->intra_ac_vlc_last_length;
3644     } else {
3645         dc= 0;
3646         start_i = 0;
3647         length     = s->inter_ac_vlc_length;
3648         last_length= s->inter_ac_vlc_last_length;
3649     }
3650     last_non_zero = s->block_last_index[n];
3651
3652 #ifdef REFINE_STATS
3653 {START_TIMER
3654 #endif
3655     dc += (1<<(RECON_SHIFT-1));
3656     for(i=0; i<64; i++){
3657         rem[i]= dc - (orig[i]<<RECON_SHIFT); //FIXME  use orig dirrectly instead of copying to rem[]
3658     }
3659 #ifdef REFINE_STATS
3660 STOP_TIMER("memset rem[]")}
3661 #endif
3662     sum=0;
3663     for(i=0; i<64; i++){
3664         int one= 36;
3665         int qns=4;
3666         int w;
3667
3668         w= FFABS(weight[i]) + qns*one;
3669         w= 15 + (48*qns*one + w/2)/w; // 16 .. 63
3670
3671         weight[i] = w;
3672 //        w=weight[i] = (63*qns + (w/2)) / w;
3673
3674         assert(w>0);
3675         assert(w<(1<<6));
3676         sum += w*w;
3677     }
3678     lambda= sum*(uint64_t)s->lambda2 >> (FF_LAMBDA_SHIFT - 6 + 6 + 6 + 6);
3679 #ifdef REFINE_STATS
3680 {START_TIMER
3681 #endif
3682     run=0;
3683     rle_index=0;
3684     for(i=start_i; i<=last_non_zero; i++){
3685         int j= perm_scantable[i];
3686         const int level= block[j];
3687         int coeff;
3688
3689         if(level){
3690             if(level<0) coeff= qmul*level - qadd;
3691             else        coeff= qmul*level + qadd;
3692             run_tab[rle_index++]=run;
3693             run=0;
3694
3695             s->dsp.add_8x8basis(rem, basis[j], coeff);
3696         }else{
3697             run++;
3698         }
3699     }
3700 #ifdef REFINE_STATS
3701 if(last_non_zero>0){
3702 STOP_TIMER("init rem[]")
3703 }
3704 }
3705
3706 {START_TIMER
3707 #endif
3708     for(;;){
3709         int best_score=s->dsp.try_8x8basis(rem, weight, basis[0], 0);
3710         int best_coeff=0;
3711         int best_change=0;
3712         int run2, best_unquant_change=0, analyze_gradient;
3713 #ifdef REFINE_STATS
3714 {START_TIMER
3715 #endif
3716         analyze_gradient = last_non_zero > 2 || s->quantizer_noise_shaping >= 3;
3717
3718         if(analyze_gradient){
3719 #ifdef REFINE_STATS
3720 {START_TIMER
3721 #endif
3722             for(i=0; i<64; i++){
3723                 int w= weight[i];
3724
3725                 d1[i] = (rem[i]*w*w + (1<<(RECON_SHIFT+12-1)))>>(RECON_SHIFT+12);
3726             }
3727 #ifdef REFINE_STATS
3728 STOP_TIMER("rem*w*w")}
3729 {START_TIMER
3730 #endif
3731             s->dsp.fdct(d1);
3732 #ifdef REFINE_STATS
3733 STOP_TIMER("dct")}
3734 #endif
3735         }
3736
3737         if(start_i){
3738             const int level= block[0];
3739             int change, old_coeff;
3740
3741             assert(s->mb_intra);
3742
3743             old_coeff= q*level;
3744
3745             for(change=-1; change<=1; change+=2){
3746                 int new_level= level + change;
3747                 int score, new_coeff;
3748
3749                 new_coeff= q*new_level;
3750                 if(new_coeff >= 2048 || new_coeff < 0)
3751                     continue;
3752
3753                 score= s->dsp.try_8x8basis(rem, weight, basis[0], new_coeff - old_coeff);
3754                 if(score<best_score){
3755                     best_score= score;
3756                     best_coeff= 0;
3757                     best_change= change;
3758                     best_unquant_change= new_coeff - old_coeff;
3759                 }
3760             }
3761         }
3762
3763         run=0;
3764         rle_index=0;
3765         run2= run_tab[rle_index++];
3766         prev_level=0;
3767         prev_run=0;
3768
3769         for(i=start_i; i<64; i++){
3770             int j= perm_scantable[i];
3771             const int level= block[j];
3772             int change, old_coeff;
3773
3774             if(s->quantizer_noise_shaping < 3 && i > last_non_zero + 1)
3775                 break;
3776
3777             if(level){
3778                 if(level<0) old_coeff= qmul*level - qadd;
3779                 else        old_coeff= qmul*level + qadd;
3780                 run2= run_tab[rle_index++]; //FIXME ! maybe after last
3781             }else{
3782                 old_coeff=0;
3783                 run2--;
3784                 assert(run2>=0 || i >= last_non_zero );
3785             }
3786
3787             for(change=-1; change<=1; change+=2){
3788                 int new_level= level + change;
3789                 int score, new_coeff, unquant_change;
3790
3791                 score=0;
3792                 if(s->quantizer_noise_shaping < 2 && FFABS(new_level) > FFABS(level))
3793                    continue;
3794
3795                 if(new_level){
3796                     if(new_level<0) new_coeff= qmul*new_level - qadd;
3797                     else            new_coeff= qmul*new_level + qadd;
3798                     if(new_coeff >= 2048 || new_coeff <= -2048)
3799                         continue;
3800                     //FIXME check for overflow
3801
3802                     if(level){
3803                         if(level < 63 && level > -63){
3804                             if(i < last_non_zero)
3805                                 score +=   length[UNI_AC_ENC_INDEX(run, new_level+64)]
3806                                          - length[UNI_AC_ENC_INDEX(run, level+64)];
3807                             else
3808                                 score +=   last_length[UNI_AC_ENC_INDEX(run, new_level+64)]
3809                                          - last_length[UNI_AC_ENC_INDEX(run, level+64)];
3810                         }
3811                     }else{
3812                         assert(FFABS(new_level)==1);
3813
3814                         if(analyze_gradient){
3815                             int g= d1[ scantable[i] ];
3816                             if(g && (g^new_level) >= 0)
3817                                 continue;
3818                         }
3819
3820                         if(i < last_non_zero){
3821                             int next_i= i + run2 + 1;
3822                             int next_level= block[ perm_scantable[next_i] ] + 64;
3823
3824                             if(next_level&(~127))
3825                                 next_level= 0;
3826
3827                             if(next_i < last_non_zero)
3828                                 score +=   length[UNI_AC_ENC_INDEX(run, 65)]
3829                                          + length[UNI_AC_ENC_INDEX(run2, next_level)]
3830                                          - length[UNI_AC_ENC_INDEX(run + run2 + 1, next_level)];
3831                             else
3832                                 score +=  length[UNI_AC_ENC_INDEX(run, 65)]
3833                                         + last_length[UNI_AC_ENC_INDEX(run2, next_level)]
3834                                         - last_length[UNI_AC_ENC_INDEX(run + run2 + 1, next_level)];
3835                         }else{
3836                             score += last_length[UNI_AC_ENC_INDEX(run, 65)];
3837                             if(prev_level){
3838                                 score +=  length[UNI_AC_ENC_INDEX(prev_run, prev_level)]
3839                                         - last_length[UNI_AC_ENC_INDEX(prev_run, prev_level)];
3840                             }
3841                         }
3842                     }
3843                 }else{
3844                     new_coeff=0;
3845                     assert(FFABS(level)==1);
3846
3847                     if(i < last_non_zero){
3848                         int next_i= i + run2 + 1;
3849                         int next_level= block[ perm_scantable[next_i] ] + 64;
3850
3851                         if(next_level&(~127))
3852                             next_level= 0;
3853
3854                         if(next_i < last_non_zero)
3855                             score +=   length[UNI_AC_ENC_INDEX(run + run2 + 1, next_level)]
3856                                      - length[UNI_AC_ENC_INDEX(run2, next_level)]
3857                                      - length[UNI_AC_ENC_INDEX(run, 65)];
3858               &nbs