Add 8088flex TMV video decoder.
[ffmpeg.git] / libavcodec / mpeg12enc.c
1 /*
2  * MPEG1/2 encoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 /**
24  * @file libavcodec/mpeg12enc.c
25  * MPEG1/2 encoder
26  */
27
28 #include "avcodec.h"
29 #include "dsputil.h"
30 #include "mpegvideo.h"
31
32 #include "mpeg12.h"
33 #include "mpeg12data.h"
34 #include "bytestream.h"
35
36
37 static const uint8_t inv_non_linear_qscale[13] = {
38     0, 2, 4, 6, 8,
39     9,10,11,12,13,14,15,16,
40 };
41
42 static const uint8_t svcd_scan_offset_placeholder[14] = {
43     0x10, 0x0E,
44     0x00, 0x80, 0x81,
45     0x00, 0x80, 0x81,
46     0xff, 0xff, 0xff,
47     0xff, 0xff, 0xff,
48 };
49
50 static void mpeg1_encode_block(MpegEncContext *s,
51                          DCTELEM *block,
52                          int component);
53 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code);    // RAL: f_code parameter added
54
55 static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
56 static uint8_t fcode_tab[MAX_MV*2+1];
57
58 static uint8_t  uni_mpeg1_ac_vlc_len [64*64*2];
59 static uint8_t  uni_mpeg2_ac_vlc_len [64*64*2];
60
61 /* simple include everything table for dc, first byte is bits number next 3 are code*/
62 static uint32_t mpeg1_lum_dc_uni[512];
63 static uint32_t mpeg1_chr_dc_uni[512];
64
65 static uint8_t mpeg1_index_run[2][64];
66 static int8_t mpeg1_max_level[2][64];
67
68 static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
69     int i;
70
71     for(i=0; i<128; i++){
72         int level= i-64;
73         int run;
74         for(run=0; run<64; run++){
75             int len, bits, code;
76
77             int alevel= FFABS(level);
78             int sign= (level>>31)&1;
79
80             if (alevel > rl->max_level[0][run])
81                 code= 111; /*rl->n*/
82             else
83                 code= rl->index_run[0][run] + alevel - 1;
84
85             if (code < 111 /* rl->n */) {
86                 /* store the vlc & sign at once */
87                 len=   rl->table_vlc[code][1]+1;
88                 bits= (rl->table_vlc[code][0]<<1) + sign;
89             } else {
90                 len=  rl->table_vlc[111/*rl->n*/][1]+6;
91                 bits= rl->table_vlc[111/*rl->n*/][0]<<6;
92
93                 bits|= run;
94                 if (alevel < 128) {
95                     bits<<=8; len+=8;
96                     bits|= level & 0xff;
97                 } else {
98                     bits<<=16; len+=16;
99                     bits|= level & 0xff;
100                     if (level < 0) {
101                         bits|= 0x8001 + level + 255;
102                     } else {
103                         bits|= level & 0xffff;
104                     }
105                 }
106             }
107
108             uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
109         }
110     }
111 }
112
113
114 static int find_frame_rate_index(MpegEncContext *s){
115     int i;
116     int64_t dmin= INT64_MAX;
117     int64_t d;
118
119     for(i=1;i<14;i++) {
120         int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num;
121         int64_t n1= 1001LL*s->avctx->time_base.den;
122         if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break;
123
124         d = FFABS(n0 - n1);
125         if(d < dmin){
126             dmin=d;
127             s->frame_rate_index= i;
128         }
129     }
130     if(dmin)
131         return -1;
132     else
133         return 0;
134 }
135
136 static av_cold int encode_init(AVCodecContext *avctx)
137 {
138     MpegEncContext *s = avctx->priv_data;
139
140     if(MPV_encode_init(avctx) < 0)
141         return -1;
142
143     if(find_frame_rate_index(s) < 0){
144         if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
145             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
146             return -1;
147         }else{
148             av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
149         }
150     }
151
152     if(avctx->profile == FF_PROFILE_UNKNOWN){
153         if(avctx->level != FF_LEVEL_UNKNOWN){
154             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
155             return -1;
156         }
157         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
158     }
159
160     if(avctx->level == FF_LEVEL_UNKNOWN){
161         if(avctx->profile == 0){ /* 4:2:2 */
162             if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
163             else                                            avctx->level = 2; /* High */
164         }else{
165             if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
166                 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
167                 return -1;
168             }
169             if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
170             else if(avctx->width <= 1440)                   avctx->level = 6; /* High 1440 */
171             else                                            avctx->level = 4; /* High */
172         }
173     }
174
175     if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){
176         av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
177         return -1;
178     }
179
180     return 0;
181 }
182
183 static void put_header(MpegEncContext *s, int header)
184 {
185     align_put_bits(&s->pb);
186     put_bits(&s->pb, 16, header>>16);
187     put_sbits(&s->pb, 16, header);
188 }
189
190 /* put sequence header if needed */
191 static void mpeg1_encode_sequence_header(MpegEncContext *s)
192 {
193         unsigned int vbv_buffer_size;
194         unsigned int fps, v;
195         int i;
196         uint64_t time_code;
197         float best_aspect_error= 1E10;
198         float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
199         int constraint_parameter_flag;
200
201         if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
202
203         if (s->current_picture.key_frame) {
204             AVRational framerate= ff_frame_rate_tab[s->frame_rate_index];
205
206             /* mpeg1 header repeated every gop */
207             put_header(s, SEQ_START_CODE);
208
209             put_sbits(&s->pb, 12, s->width );
210             put_sbits(&s->pb, 12, s->height);
211
212             for(i=1; i<15; i++){
213                 float error= aspect_ratio;
214                 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
215                     error-= 1.0/ff_mpeg1_aspect[i];
216                 else
217                     error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
218
219                 error= FFABS(error);
220
221                 if(error < best_aspect_error){
222                     best_aspect_error= error;
223                     s->aspect_ratio_info= i;
224                 }
225             }
226
227             put_bits(&s->pb, 4, s->aspect_ratio_info);
228             put_bits(&s->pb, 4, s->frame_rate_index);
229
230             if(s->avctx->rc_max_rate){
231                 v = (s->avctx->rc_max_rate + 399) / 400;
232                 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
233                     v = 0x3ffff;
234             }else{
235                 v= 0x3FFFF;
236             }
237
238             if(s->avctx->rc_buffer_size)
239                 vbv_buffer_size = s->avctx->rc_buffer_size;
240             else
241                 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
242                 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
243             vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
244
245             put_sbits(&s->pb, 18, v);
246             put_bits(&s->pb, 1, 1); /* marker */
247             put_sbits(&s->pb, 10, vbv_buffer_size);
248
249             constraint_parameter_flag=
250                 s->width <= 768 && s->height <= 576 &&
251                 s->mb_width * s->mb_height <= 396 &&
252                 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
253                 framerate.num <= framerate.den*30 &&
254                 s->avctx->me_range && s->avctx->me_range < 128 &&
255                 vbv_buffer_size <= 20 &&
256                 v <= 1856000/400 &&
257                 s->codec_id == CODEC_ID_MPEG1VIDEO;
258
259             put_bits(&s->pb, 1, constraint_parameter_flag);
260
261             ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
262             ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
263
264             if(s->codec_id == CODEC_ID_MPEG2VIDEO){
265                 put_header(s, EXT_START_CODE);
266                 put_bits(&s->pb, 4, 1); //seq ext
267
268                 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
269
270                 put_bits(&s->pb, 3, s->avctx->profile); //profile
271                 put_bits(&s->pb, 4, s->avctx->level); //level
272
273                 put_bits(&s->pb, 1, s->progressive_sequence);
274                 put_bits(&s->pb, 2, s->chroma_format);
275                 put_bits(&s->pb, 2, s->width >>12);
276                 put_bits(&s->pb, 2, s->height>>12);
277                 put_bits(&s->pb, 12, v>>18); //bitrate ext
278                 put_bits(&s->pb, 1, 1); //marker
279                 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
280                 put_bits(&s->pb, 1, s->low_delay);
281                 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
282                 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
283             }
284
285             put_header(s, GOP_START_CODE);
286             put_bits(&s->pb, 1, !!(s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */
287             /* time code : we must convert from the real frame rate to a
288                fake mpeg frame rate in case of low frame rate */
289             fps = (framerate.num + framerate.den/2)/ framerate.den;
290             time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start;
291
292             s->gop_picture_number = s->current_picture_ptr->coded_picture_number;
293             if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) {
294                 /* only works for NTSC 29.97 */
295                 int d = time_code / 17982;
296                 int m = time_code % 17982;
297                 //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
298                 time_code += 18 * d + 2 * ((m - 2) / 1798);
299             }
300             put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
301             put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
302             put_bits(&s->pb, 1, 1);
303             put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
304             put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
305             put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
306             put_bits(&s->pb, 1, 0); /* broken link */
307         }
308 }
309
310 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
311     while (run >= 33) {
312         put_bits(&s->pb, 11, 0x008);
313         run -= 33;
314     }
315     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
316              ff_mpeg12_mbAddrIncrTable[run][0]);
317 }
318
319 static av_always_inline void put_qscale(MpegEncContext *s)
320 {
321     if(s->q_scale_type){
322         assert(s->qscale>=1 && s->qscale <=12);
323         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
324     }else{
325         put_bits(&s->pb, 5, s->qscale);
326     }
327 }
328
329 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
330     put_header(s, SLICE_MIN_START_CODE + s->mb_y);
331     put_qscale(s);
332     put_bits(&s->pb, 1, 0); /* slice extra information */
333 }
334
335 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
336 {
337     mpeg1_encode_sequence_header(s);
338
339     /* mpeg1 picture header */
340     put_header(s, PICTURE_START_CODE);
341     /* temporal reference */
342
343     // RAL: s->picture_number instead of s->fake_picture_number
344     put_bits(&s->pb, 10, (s->picture_number -
345                           s->gop_picture_number) & 0x3ff);
346     put_bits(&s->pb, 3, s->pict_type);
347
348     s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
349     put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
350
351     // RAL: Forward f_code also needed for B frames
352     if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
353         put_bits(&s->pb, 1, 0); /* half pel coordinates */
354         if(s->codec_id == CODEC_ID_MPEG1VIDEO)
355             put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
356         else
357             put_bits(&s->pb, 3, 7); /* forward_f_code */
358     }
359
360     // RAL: Backward f_code necessary for B frames
361     if (s->pict_type == FF_B_TYPE) {
362         put_bits(&s->pb, 1, 0); /* half pel coordinates */
363         if(s->codec_id == CODEC_ID_MPEG1VIDEO)
364             put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
365         else
366             put_bits(&s->pb, 3, 7); /* backward_f_code */
367     }
368
369     put_bits(&s->pb, 1, 0); /* extra bit picture */
370
371     s->frame_pred_frame_dct = 1;
372     if(s->codec_id == CODEC_ID_MPEG2VIDEO){
373         put_header(s, EXT_START_CODE);
374         put_bits(&s->pb, 4, 8); //pic ext
375         if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
376             put_bits(&s->pb, 4, s->f_code);
377             put_bits(&s->pb, 4, s->f_code);
378         }else{
379             put_bits(&s->pb, 8, 255);
380         }
381         if (s->pict_type == FF_B_TYPE) {
382             put_bits(&s->pb, 4, s->b_code);
383             put_bits(&s->pb, 4, s->b_code);
384         }else{
385             put_bits(&s->pb, 8, 255);
386         }
387         put_bits(&s->pb, 2, s->intra_dc_precision);
388
389         assert(s->picture_structure == PICT_FRAME);
390         put_bits(&s->pb, 2, s->picture_structure);
391         if (s->progressive_sequence) {
392             put_bits(&s->pb, 1, 0); /* no repeat */
393         } else {
394             put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
395         }
396         /* XXX: optimize the generation of this flag with entropy
397            measures */
398         s->frame_pred_frame_dct = s->progressive_sequence;
399
400         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
401         put_bits(&s->pb, 1, s->concealment_motion_vectors);
402         put_bits(&s->pb, 1, s->q_scale_type);
403         put_bits(&s->pb, 1, s->intra_vlc_format);
404         put_bits(&s->pb, 1, s->alternate_scan);
405         put_bits(&s->pb, 1, s->repeat_first_field);
406         s->progressive_frame = s->progressive_sequence;
407         put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
408         put_bits(&s->pb, 1, s->progressive_frame);
409         put_bits(&s->pb, 1, 0); //composite_display_flag
410     }
411     if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
412         int i;
413
414         put_header(s, USER_START_CODE);
415         for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
416             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
417         }
418     }
419
420     s->mb_y=0;
421     ff_mpeg1_encode_slice_header(s);
422 }
423
424 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
425                                 int has_mv, int field_motion)
426 {
427     put_bits(&s->pb, n, bits);
428     if (!s->frame_pred_frame_dct) {
429         if (has_mv)
430             put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
431         put_bits(&s->pb, 1, s->interlaced_dct);
432     }
433 }
434
435 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
436                                                    DCTELEM block[6][64],
437                                                    int motion_x, int motion_y,
438                                                    int mb_block_count)
439 {
440     int i, cbp;
441     const int mb_x = s->mb_x;
442     const int mb_y = s->mb_y;
443     const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
444
445     /* compute cbp */
446     cbp = 0;
447     for(i=0;i<mb_block_count;i++) {
448         if (s->block_last_index[i] >= 0)
449             cbp |= 1 << (mb_block_count - 1 - i);
450     }
451
452     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
453         (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
454         ((s->pict_type == FF_P_TYPE && (motion_x | motion_y) == 0) ||
455         (s->pict_type == FF_B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
456         ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
457         s->mb_skip_run++;
458         s->qscale -= s->dquant;
459         s->skip_count++;
460         s->misc_bits++;
461         s->last_bits++;
462         if(s->pict_type == FF_P_TYPE){
463             s->last_mv[0][1][0]= s->last_mv[0][0][0]=
464             s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
465         }
466     } else {
467         if(first_mb){
468             assert(s->mb_skip_run == 0);
469             encode_mb_skip_run(s, s->mb_x);
470         }else{
471             encode_mb_skip_run(s, s->mb_skip_run);
472         }
473
474         if (s->pict_type == FF_I_TYPE) {
475             if(s->dquant && cbp){
476                 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
477                 put_qscale(s);
478             }else{
479                 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
480                 s->qscale -= s->dquant;
481             }
482             s->misc_bits+= get_bits_diff(s);
483             s->i_count++;
484         } else if (s->mb_intra) {
485             if(s->dquant && cbp){
486                 put_mb_modes(s, 6, 0x01, 0, 0);
487                 put_qscale(s);
488             }else{
489                 put_mb_modes(s, 5, 0x03, 0, 0);
490                 s->qscale -= s->dquant;
491             }
492             s->misc_bits+= get_bits_diff(s);
493             s->i_count++;
494             memset(s->last_mv, 0, sizeof(s->last_mv));
495         } else if (s->pict_type == FF_P_TYPE) {
496             if(s->mv_type == MV_TYPE_16X16){
497                 if (cbp != 0) {
498                     if ((motion_x|motion_y) == 0) {
499                         if(s->dquant){
500                             put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
501                             put_qscale(s);
502                         }else{
503                             put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
504                         }
505                         s->misc_bits+= get_bits_diff(s);
506                     } else {
507                         if(s->dquant){
508                             put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
509                             put_qscale(s);
510                         }else{
511                             put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
512                         }
513                         s->misc_bits+= get_bits_diff(s);
514                         mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added
515                         mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added
516                         s->mv_bits+= get_bits_diff(s);
517                     }
518                 } else {
519                     put_bits(&s->pb, 3, 1); /* motion only */
520                     if (!s->frame_pred_frame_dct)
521                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
522                     s->misc_bits+= get_bits_diff(s);
523                     mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added
524                     mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added
525                     s->qscale -= s->dquant;
526                     s->mv_bits+= get_bits_diff(s);
527                 }
528                 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
529                 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
530             }else{
531                 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
532
533                 if (cbp) {
534                     if(s->dquant){
535                         put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
536                         put_qscale(s);
537                     }else{
538                         put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
539                     }
540                 } else {
541                     put_bits(&s->pb, 3, 1); /* motion only */
542                     put_bits(&s->pb, 2, 1); /* motion_type: field */
543                     s->qscale -= s->dquant;
544                 }
545                 s->misc_bits+= get_bits_diff(s);
546                 for(i=0; i<2; i++){
547                     put_bits(&s->pb, 1, s->field_select[0][i]);
548                     mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);
549                     mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
550                     s->last_mv[0][i][0]=   s->mv[0][i][0];
551                     s->last_mv[0][i][1]= 2*s->mv[0][i][1];
552                 }
553                 s->mv_bits+= get_bits_diff(s);
554             }
555             if(cbp) {
556                 if (s->chroma_y_shift) {
557                     put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
558                 } else {
559                     put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
560                     put_sbits(&s->pb, 2, cbp);
561                 }
562             }
563             s->f_count++;
564         } else{
565             if(s->mv_type == MV_TYPE_16X16){
566                 if (cbp){    // With coded bloc pattern
567                     if (s->dquant) {
568                         if(s->mv_dir == MV_DIR_FORWARD)
569                             put_mb_modes(s, 6, 3, 1, 0);
570                         else
571                             put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
572                         put_qscale(s);
573                     } else {
574                         put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
575                     }
576                 }else{    // No coded bloc pattern
577                     put_bits(&s->pb, 5-s->mv_dir, 2);
578                     if (!s->frame_pred_frame_dct)
579                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
580                     s->qscale -= s->dquant;
581                 }
582                 s->misc_bits += get_bits_diff(s);
583                 if (s->mv_dir&MV_DIR_FORWARD){
584                     mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
585                     mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
586                     s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
587                     s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
588                     s->f_count++;
589                 }
590                 if (s->mv_dir&MV_DIR_BACKWARD){
591                     mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
592                     mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
593                     s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
594                     s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
595                     s->b_count++;
596                 }
597             }else{
598                 assert(s->mv_type == MV_TYPE_FIELD);
599                 assert(!s->frame_pred_frame_dct);
600                 if (cbp){    // With coded bloc pattern
601                     if (s->dquant) {
602                         if(s->mv_dir == MV_DIR_FORWARD)
603                             put_mb_modes(s, 6, 3, 1, 1);
604                         else
605                             put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
606                         put_qscale(s);
607                     } else {
608                         put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
609                     }
610                 }else{    // No coded bloc pattern
611                     put_bits(&s->pb, 5-s->mv_dir, 2);
612                     put_bits(&s->pb, 2, 1); /* motion_type: field */
613                     s->qscale -= s->dquant;
614                 }
615                 s->misc_bits += get_bits_diff(s);
616                 if (s->mv_dir&MV_DIR_FORWARD){
617                     for(i=0; i<2; i++){
618                         put_bits(&s->pb, 1, s->field_select[0][i]);
619                         mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);
620                         mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
621                         s->last_mv[0][i][0]=   s->mv[0][i][0];
622                         s->last_mv[0][i][1]= 2*s->mv[0][i][1];
623                     }
624                     s->f_count++;
625                 }
626                 if (s->mv_dir&MV_DIR_BACKWARD){
627                     for(i=0; i<2; i++){
628                         put_bits(&s->pb, 1, s->field_select[1][i]);
629                         mpeg1_encode_motion(s, s->mv[1][i][0] -  s->last_mv[1][i][0]    , s->b_code);
630                         mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
631                         s->last_mv[1][i][0]=   s->mv[1][i][0];
632                         s->last_mv[1][i][1]= 2*s->mv[1][i][1];
633                     }
634                     s->b_count++;
635                 }
636             }
637             s->mv_bits += get_bits_diff(s);
638             if(cbp) {
639                 if (s->chroma_y_shift) {
640                     put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
641                 } else {
642                     put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
643                     put_sbits(&s->pb, 2, cbp);
644                 }
645             }
646         }
647         for(i=0;i<mb_block_count;i++) {
648             if (cbp & (1 << (mb_block_count - 1 - i))) {
649                 mpeg1_encode_block(s, block[i], i);
650             }
651         }
652         s->mb_skip_run = 0;
653         if(s->mb_intra)
654             s->i_tex_bits+= get_bits_diff(s);
655         else
656             s->p_tex_bits+= get_bits_diff(s);
657     }
658 }
659
660 void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
661 {
662     if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
663     else                                mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
664 }
665
666 // RAL: Parameter added: f_or_b_code
667 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
668 {
669     if (val == 0) {
670         /* zero vector */
671         put_bits(&s->pb,
672                  ff_mpeg12_mbMotionVectorTable[0][1],
673                  ff_mpeg12_mbMotionVectorTable[0][0]);
674     } else {
675         int code, sign, bits;
676         int bit_size = f_or_b_code - 1;
677         int range = 1 << bit_size;
678         /* modulo encoding */
679         int l= INT_BIT - 5 - bit_size;
680         val= (val<<l)>>l;
681
682         if (val >= 0) {
683             val--;
684             code = (val >> bit_size) + 1;
685             bits = val & (range - 1);
686             sign = 0;
687         } else {
688             val = -val;
689             val--;
690             code = (val >> bit_size) + 1;
691             bits = val & (range - 1);
692             sign = 1;
693         }
694
695         assert(code > 0 && code <= 16);
696
697         put_bits(&s->pb,
698                  ff_mpeg12_mbMotionVectorTable[code][1],
699                  ff_mpeg12_mbMotionVectorTable[code][0]);
700
701         put_bits(&s->pb, 1, sign);
702         if (bit_size > 0) {
703             put_bits(&s->pb, bit_size, bits);
704         }
705     }
706 }
707
708 void ff_mpeg1_encode_init(MpegEncContext *s)
709 {
710     static int done=0;
711
712     ff_mpeg12_common_init(s);
713
714     if(!done){
715         int f_code;
716         int mv;
717         int i;
718
719         done=1;
720         init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
721         init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
722
723         for(i=0; i<64; i++)
724         {
725                 mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
726                 mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
727         }
728
729         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
730         if(s->intra_vlc_format)
731             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
732
733         /* build unified dc encoding tables */
734         for(i=-255; i<256; i++)
735         {
736                 int adiff, index;
737                 int bits, code;
738                 int diff=i;
739
740                 adiff = FFABS(diff);
741                 if(diff<0) diff--;
742                 index = av_log2(2*adiff);
743
744                 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
745                 code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
746                 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
747
748                 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
749                 code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
750                 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
751         }
752
753         for(f_code=1; f_code<=MAX_FCODE; f_code++){
754             for(mv=-MAX_MV; mv<=MAX_MV; mv++){
755                 int len;
756
757                 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
758                 else{
759                     int val, bit_size, range, code;
760
761                     bit_size = f_code - 1;
762                     range = 1 << bit_size;
763
764                     val=mv;
765                     if (val < 0)
766                         val = -val;
767                     val--;
768                     code = (val >> bit_size) + 1;
769                     if(code<17){
770                         len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
771                     }else{
772                         len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
773                     }
774                 }
775
776                 mv_penalty[f_code][mv+MAX_MV]= len;
777             }
778         }
779
780
781         for(f_code=MAX_FCODE; f_code>0; f_code--){
782             for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
783                 fcode_tab[mv+MAX_MV]= f_code;
784             }
785         }
786     }
787     s->me.mv_penalty= mv_penalty;
788     s->fcode_tab= fcode_tab;
789     if(s->codec_id == CODEC_ID_MPEG1VIDEO){
790         s->min_qcoeff=-255;
791         s->max_qcoeff= 255;
792     }else{
793         s->min_qcoeff=-2047;
794         s->max_qcoeff= 2047;
795     }
796     if (s->intra_vlc_format) {
797         s->intra_ac_vlc_length=
798         s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
799     } else {
800         s->intra_ac_vlc_length=
801         s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
802     }
803     s->inter_ac_vlc_length=
804     s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
805 }
806
807 static inline void encode_dc(MpegEncContext *s, int diff, int component)
808 {
809   if(((unsigned) (diff+255)) >= 511){
810         int index;
811
812         if(diff<0){
813             index= av_log2_16bit(-2*diff);
814             diff--;
815         }else{
816             index= av_log2_16bit(2*diff);
817         }
818         if (component == 0) {
819             put_bits(
820                 &s->pb,
821                 ff_mpeg12_vlc_dc_lum_bits[index] + index,
822                 (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
823         }else{
824             put_bits(
825                 &s->pb,
826                 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
827                 (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
828         }
829   }else{
830     if (component == 0) {
831         put_bits(
832             &s->pb,
833             mpeg1_lum_dc_uni[diff+255]&0xFF,
834             mpeg1_lum_dc_uni[diff+255]>>8);
835     } else {
836         put_bits(
837             &s->pb,
838             mpeg1_chr_dc_uni[diff+255]&0xFF,
839             mpeg1_chr_dc_uni[diff+255]>>8);
840     }
841   }
842 }
843
844 static void mpeg1_encode_block(MpegEncContext *s,
845                                DCTELEM *block,
846                                int n)
847 {
848     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
849     int code, component;
850     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
851
852     last_index = s->block_last_index[n];
853
854     /* DC coef */
855     if (s->mb_intra) {
856         component = (n <= 3 ? 0 : (n&1) + 1);
857         dc = block[0]; /* overflow is impossible */
858         diff = dc - s->last_dc[component];
859         encode_dc(s, diff, component);
860         s->last_dc[component] = dc;
861         i = 1;
862         if (s->intra_vlc_format)
863             table_vlc = ff_rl_mpeg2.table_vlc;
864     } else {
865         /* encode the first coefficient : needs to be done here because
866            it is handled slightly differently */
867         level = block[0];
868         if (abs(level) == 1) {
869                 code = ((uint32_t)level >> 31); /* the sign bit */
870                 put_bits(&s->pb, 2, code | 0x02);
871                 i = 1;
872         } else {
873             i = 0;
874             last_non_zero = -1;
875             goto next_coef;
876         }
877     }
878
879     /* now quantify & encode AC coefs */
880     last_non_zero = i - 1;
881
882     for(;i<=last_index;i++) {
883         j = s->intra_scantable.permutated[i];
884         level = block[j];
885     next_coef:
886 #if 0
887         if (level != 0)
888             dprintf(s->avctx, "level[%d]=%d\n", i, level);
889 #endif
890         /* encode using VLC */
891         if (level != 0) {
892             run = i - last_non_zero - 1;
893
894             alevel= level;
895             MASK_ABS(sign, alevel)
896             sign&=1;
897
898             if (alevel <= mpeg1_max_level[0][run]){
899                 code= mpeg1_index_run[0][run] + alevel - 1;
900                 /* store the vlc & sign at once */
901                 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
902             } else {
903                 /* escape seems to be pretty rare <5% so I do not optimize it */
904                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
905                 /* escape: only clip in this case */
906                 put_bits(&s->pb, 6, run);
907                 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
908                     if (alevel < 128) {
909                         put_sbits(&s->pb, 8, level);
910                     } else {
911                         if (level < 0) {
912                             put_bits(&s->pb, 16, 0x8001 + level + 255);
913                         } else {
914                             put_sbits(&s->pb, 16, level);
915                         }
916                     }
917                 }else{
918                     put_sbits(&s->pb, 12, level);
919                 }
920             }
921             last_non_zero = i;
922         }
923     }
924     /* end of block */
925     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
926 }
927
928 AVCodec mpeg1video_encoder = {
929     "mpeg1video",
930     CODEC_TYPE_VIDEO,
931     CODEC_ID_MPEG1VIDEO,
932     sizeof(MpegEncContext),
933     encode_init,
934     MPV_encode_picture,
935     MPV_encode_end,
936     .supported_framerates= ff_frame_rate_tab+1,
937     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
938     .capabilities= CODEC_CAP_DELAY,
939     .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
940 };
941
942 AVCodec mpeg2video_encoder = {
943     "mpeg2video",
944     CODEC_TYPE_VIDEO,
945     CODEC_ID_MPEG2VIDEO,
946     sizeof(MpegEncContext),
947     encode_init,
948     MPV_encode_picture,
949     MPV_encode_end,
950     .supported_framerates= ff_frame_rate_tab+1,
951     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE},
952     .capabilities= CODEC_CAP_DELAY,
953     .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
954 };