b069f2db64f41b1f4ed7905fd21d59189e828b2c
[ffmpeg.git] / libavcodec / mpeg12enc.c
1 /*
2  * MPEG-1/2 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
25  * MPEG-1/2 encoder
26  */
27
28 #include <stdint.h>
29
30 #include "libavutil/attributes.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/log.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/thread.h"
35 #include "libavutil/timecode.h"
36 #include "libavutil/stereo3d.h"
37
38 #include "avcodec.h"
39 #include "bytestream.h"
40 #include "mathops.h"
41 #include "mpeg12.h"
42 #include "mpeg12data.h"
43 #include "mpegutils.h"
44 #include "mpegvideo.h"
45 #include "profiles.h"
46
47 static const uint8_t svcd_scan_offset_placeholder[] = {
48     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
49     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
50 };
51
52 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
53 static uint8_t fcode_tab[MAX_MV * 2 + 1];
54
55 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
56 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
57
58 /* simple include everything table for dc, first byte is bits
59  * number next 3 are code */
60 static uint32_t mpeg1_lum_dc_uni[512];
61 static uint32_t mpeg1_chr_dc_uni[512];
62
63 static uint8_t mpeg1_index_run[2][64];
64 static int8_t  mpeg1_max_level[2][64];
65
66 #define A53_MAX_CC_COUNT 0x1f
67
68 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
69 {
70     int i;
71
72     for (i = 0; i < 128; i++) {
73         int level = i - 64;
74         int run;
75         if (!level)
76             continue;
77         for (run = 0; run < 64; run++) {
78             int len, code;
79             int alevel = FFABS(level);
80
81             if (alevel > rl->max_level[0][run])
82                 code = 111;                         /* rl->n */
83             else
84                 code = rl->index_run[0][run] + alevel - 1;
85
86             if (code < 111) {                       /* rl->n */
87                 /* length of VLC and sign */
88                 len = rl->table_vlc[code][1] + 1;
89             } else {
90                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
91
92                 if (alevel < 128)
93                     len += 8;
94                 else
95                     len += 16;
96             }
97
98             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
99         }
100     }
101 }
102
103 static int find_frame_rate_index(MpegEncContext *s)
104 {
105     int i;
106     AVRational bestq = (AVRational) {0, 0};
107     AVRational ext;
108     AVRational target = av_inv_q(s->avctx->time_base);
109
110     for (i = 1; i < 14; i++) {
111         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
112             i >= 9)
113             break;
114
115         for (ext.num=1; ext.num <= 4; ext.num++) {
116             for (ext.den=1; ext.den <= 32; ext.den++) {
117                 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
118
119                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
120                     continue;
121                 if (av_gcd(ext.den, ext.num) != 1)
122                     continue;
123
124                 if (    bestq.num==0
125                     || av_nearer_q(target, bestq, q) < 0
126                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
127                     bestq               = q;
128                     s->frame_rate_index = i;
129                     s->mpeg2_frame_rate_ext.num = ext.num;
130                     s->mpeg2_frame_rate_ext.den = ext.den;
131                 }
132             }
133         }
134     }
135
136     if (av_cmp_q(target, bestq))
137         return -1;
138     else
139         return 0;
140 }
141
142 static av_cold int encode_init(AVCodecContext *avctx)
143 {
144     int ret;
145     MpegEncContext *s = avctx->priv_data;
146
147     if ((ret = ff_mpv_encode_init(avctx)) < 0)
148         return ret;
149
150     if (find_frame_rate_index(s) < 0) {
151         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
152             av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
153                    avctx->time_base.den, avctx->time_base.num);
154             return AVERROR(EINVAL);
155         } else {
156             av_log(avctx, AV_LOG_INFO,
157                    "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
158                    avctx->time_base.den, avctx->time_base.num);
159         }
160     }
161
162     if (avctx->profile == FF_PROFILE_UNKNOWN) {
163         if (avctx->level != FF_LEVEL_UNKNOWN) {
164             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
165             return AVERROR(EINVAL);
166         }
167         /* Main or 4:2:2 */
168         avctx->profile = s->chroma_format == CHROMA_420 ? FF_PROFILE_MPEG2_MAIN : FF_PROFILE_MPEG2_422;
169     }
170
171     if (avctx->level == FF_LEVEL_UNKNOWN) {
172         if (avctx->profile == FF_PROFILE_MPEG2_422) {   /* 4:2:2 */
173             if (avctx->width <= 720 && avctx->height <= 608)
174                 avctx->level = 5;                   /* Main */
175             else
176                 avctx->level = 2;                   /* High */
177         } else {
178             if (avctx->profile != FF_PROFILE_MPEG2_HIGH && s->chroma_format != CHROMA_420) {
179                 av_log(avctx, AV_LOG_ERROR,
180                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
181                 return AVERROR(EINVAL);
182             }
183             if (avctx->width <= 720 && avctx->height <= 576)
184                 avctx->level = 8;                   /* Main */
185             else if (avctx->width <= 1440)
186                 avctx->level = 6;                   /* High 1440 */
187             else
188                 avctx->level = 4;                   /* High */
189         }
190     }
191
192     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
193         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
194         return AVERROR(EINVAL);
195     }
196
197     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
198         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
199             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
200                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
201             return AVERROR(EINVAL);
202         }
203     }
204
205     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
206     if (s->drop_frame_timecode)
207         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
208     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
209         av_log(avctx, AV_LOG_ERROR,
210                "Drop frame time code only allowed with 1001/30000 fps\n");
211         return AVERROR(EINVAL);
212     }
213
214 #if FF_API_PRIVATE_OPT
215 FF_DISABLE_DEPRECATION_WARNINGS
216     if (avctx->timecode_frame_start)
217         s->timecode_frame_start = avctx->timecode_frame_start;
218 FF_ENABLE_DEPRECATION_WARNINGS
219 #endif
220
221     if (s->tc_opt_str) {
222         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
223         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
224         if (ret < 0)
225             return ret;
226         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
227         s->timecode_frame_start = s->tc.start;
228     } else {
229         s->timecode_frame_start = 0; // default is -1
230     }
231
232     return 0;
233 }
234
235 static void put_header(MpegEncContext *s, int header)
236 {
237     align_put_bits(&s->pb);
238     put_bits(&s->pb, 16, header >> 16);
239     put_sbits(&s->pb, 16, header);
240 }
241
242 /* put sequence header if needed */
243 static void mpeg1_encode_sequence_header(MpegEncContext *s)
244 {
245     unsigned int vbv_buffer_size, fps, v;
246     int i, constraint_parameter_flag;
247     uint64_t time_code;
248     int64_t best_aspect_error = INT64_MAX;
249     AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
250
251     if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
252         aspect_ratio = (AVRational){1,1};             // pixel aspect 1.1 (VGA)
253
254     if (s->current_picture.f->key_frame) {
255         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
256
257         /* MPEG-1 header repeated every GOP */
258         put_header(s, SEQ_START_CODE);
259
260         put_sbits(&s->pb, 12, s->width  & 0xFFF);
261         put_sbits(&s->pb, 12, s->height & 0xFFF);
262
263         for (i = 1; i < 15; i++) {
264             int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
265             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
266                 error -= (1LL<<32) / ff_mpeg1_aspect[i];
267             else
268                 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
269
270             error = FFABS(error);
271
272             if (error - 2 <= best_aspect_error) {
273                 best_aspect_error    = error;
274                 s->aspect_ratio_info = i;
275             }
276         }
277
278         put_bits(&s->pb, 4, s->aspect_ratio_info);
279         put_bits(&s->pb, 4, s->frame_rate_index);
280
281         if (s->avctx->rc_max_rate) {
282             v = (s->avctx->rc_max_rate + 399) / 400;
283             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
284                 v = 0x3ffff;
285         } else {
286             v = 0x3FFFF;
287         }
288
289         if (s->avctx->rc_buffer_size)
290             vbv_buffer_size = s->avctx->rc_buffer_size;
291         else
292             /* VBV calculation: Scaled so that a VCD has the proper
293              * VBV size of 40 kilobytes */
294             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
295         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
296
297         put_sbits(&s->pb, 18, v);
298         put_bits(&s->pb, 1, 1);         // marker
299         put_sbits(&s->pb, 10, vbv_buffer_size);
300
301         constraint_parameter_flag =
302             s->width  <= 768                                    &&
303             s->height <= 576                                    &&
304             s->mb_width * s->mb_height                 <= 396   &&
305             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
306             framerate.num <= framerate.den * 30                 &&
307             s->avctx->me_range                                  &&
308             s->avctx->me_range < 128                            &&
309             vbv_buffer_size <= 20                               &&
310             v <= 1856000 / 400                                  &&
311             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
312
313         put_bits(&s->pb, 1, constraint_parameter_flag);
314
315         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
316         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
317
318         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
319             AVFrameSideData *side_data;
320             int width = s->width;
321             int height = s->height;
322             int use_seq_disp_ext;
323
324             put_header(s, EXT_START_CODE);
325             put_bits(&s->pb, 4, 1);                 // seq ext
326
327             put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
328
329             put_bits(&s->pb, 3, s->avctx->profile); // profile
330             put_bits(&s->pb, 4, s->avctx->level);   // level
331
332             put_bits(&s->pb, 1, s->progressive_sequence);
333             put_bits(&s->pb, 2, s->chroma_format);
334             put_bits(&s->pb, 2, s->width  >> 12);
335             put_bits(&s->pb, 2, s->height >> 12);
336             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
337             put_bits(&s->pb, 1, 1);                 // marker
338             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
339             put_bits(&s->pb, 1, s->low_delay);
340             put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
341             put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
342
343             side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
344             if (side_data) {
345                 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
346                 if (pan_scan->width && pan_scan->height) {
347                     width = pan_scan->width >> 4;
348                     height = pan_scan->height >> 4;
349                 }
350             }
351
352             use_seq_disp_ext = (width != s->width ||
353                                 height != s->height ||
354                                 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
355                                 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
356                                 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
357                                 s->video_format != VIDEO_FORMAT_UNSPECIFIED);
358
359             if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
360                 put_header(s, EXT_START_CODE);
361                 put_bits(&s->pb, 4, 2);                         // sequence display extension
362                 put_bits(&s->pb, 3, s->video_format);           // video_format
363                 put_bits(&s->pb, 1, 1);                         // colour_description
364                 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
365                 put_bits(&s->pb, 8, s->avctx->color_trc);       // transfer_characteristics
366                 put_bits(&s->pb, 8, s->avctx->colorspace);      // matrix_coefficients
367                 put_bits(&s->pb, 14, width);                    // display_horizontal_size
368                 put_bits(&s->pb, 1, 1);                         // marker_bit
369                 put_bits(&s->pb, 14, height);                   // display_vertical_size
370                 put_bits(&s->pb, 3, 0);                         // remaining 3 bits are zero padding
371             }
372         }
373
374         put_header(s, GOP_START_CODE);
375         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
376         /* time code: we must convert from the real frame rate to a
377          * fake MPEG frame rate in case of low frame rate */
378         fps       = (framerate.num + framerate.den / 2) / framerate.den;
379         time_code = s->current_picture_ptr->f->coded_picture_number +
380                     s->timecode_frame_start;
381
382         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
383
384         av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
385         if (s->drop_frame_timecode)
386             time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
387
388         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
389         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
390         put_bits(&s->pb, 1, 1);
391         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
392         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
393         put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
394         put_bits(&s->pb, 1, 0);                     // broken link
395     }
396 }
397
398 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
399 {
400     while (run >= 33) {
401         put_bits(&s->pb, 11, 0x008);
402         run -= 33;
403     }
404     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
405              ff_mpeg12_mbAddrIncrTable[run][0]);
406 }
407
408 static av_always_inline void put_qscale(MpegEncContext *s)
409 {
410     put_bits(&s->pb, 5, s->qscale);
411 }
412
413 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
414 {
415     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
416         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
417         /* slice_vertical_position_extension */
418         put_bits(&s->pb, 3, s->mb_y >> 7);
419     } else {
420         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
421     }
422     put_qscale(s);
423     /* slice extra information */
424     put_bits(&s->pb, 1, 0);
425 }
426
427 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
428 {
429     AVFrameSideData *side_data;
430     mpeg1_encode_sequence_header(s);
431
432     /* MPEG-1 picture header */
433     put_header(s, PICTURE_START_CODE);
434     /* temporal reference */
435
436     // RAL: s->picture_number instead of s->fake_picture_number
437     put_bits(&s->pb, 10,
438              (s->picture_number - s->gop_picture_number) & 0x3ff);
439     put_bits(&s->pb, 3, s->pict_type);
440
441     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
442     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
443
444     // RAL: Forward f_code also needed for B-frames
445     if (s->pict_type == AV_PICTURE_TYPE_P ||
446         s->pict_type == AV_PICTURE_TYPE_B) {
447         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
448         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
449             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
450         else
451             put_bits(&s->pb, 3, 7);             /* forward_f_code */
452     }
453
454     // RAL: Backward f_code necessary for B-frames
455     if (s->pict_type == AV_PICTURE_TYPE_B) {
456         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
457         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
458             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
459         else
460             put_bits(&s->pb, 3, 7);             /* backward_f_code */
461     }
462
463     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
464
465     s->frame_pred_frame_dct = 1;
466     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
467         put_header(s, EXT_START_CODE);
468         put_bits(&s->pb, 4, 8);                 /* pic ext */
469         if (s->pict_type == AV_PICTURE_TYPE_P ||
470             s->pict_type == AV_PICTURE_TYPE_B) {
471             put_bits(&s->pb, 4, s->f_code);
472             put_bits(&s->pb, 4, s->f_code);
473         } else {
474             put_bits(&s->pb, 8, 255);
475         }
476         if (s->pict_type == AV_PICTURE_TYPE_B) {
477             put_bits(&s->pb, 4, s->b_code);
478             put_bits(&s->pb, 4, s->b_code);
479         } else {
480             put_bits(&s->pb, 8, 255);
481         }
482         put_bits(&s->pb, 2, s->intra_dc_precision);
483
484         av_assert0(s->picture_structure == PICT_FRAME);
485         put_bits(&s->pb, 2, s->picture_structure);
486         if (s->progressive_sequence)
487             put_bits(&s->pb, 1, 0);             /* no repeat */
488         else
489             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
490         /* XXX: optimize the generation of this flag with entropy measures */
491         s->frame_pred_frame_dct = s->progressive_sequence;
492
493         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
494         put_bits(&s->pb, 1, s->concealment_motion_vectors);
495         put_bits(&s->pb, 1, s->q_scale_type);
496         put_bits(&s->pb, 1, s->intra_vlc_format);
497         put_bits(&s->pb, 1, s->alternate_scan);
498         put_bits(&s->pb, 1, s->repeat_first_field);
499         s->progressive_frame = s->progressive_sequence;
500         /* chroma_420_type */
501         put_bits(&s->pb, 1, s->chroma_format ==
502                             CHROMA_420 ? s->progressive_frame : 0);
503         put_bits(&s->pb, 1, s->progressive_frame);
504         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
505     }
506     if (s->scan_offset) {
507         int i;
508
509         put_header(s, USER_START_CODE);
510         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
511             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
512     }
513     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
514                                        AV_FRAME_DATA_STEREO3D);
515     if (side_data) {
516         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
517         uint8_t fpa_type;
518
519         switch (stereo->type) {
520         case AV_STEREO3D_SIDEBYSIDE:
521             fpa_type = 0x03;
522             break;
523         case AV_STEREO3D_TOPBOTTOM:
524             fpa_type = 0x04;
525             break;
526         case AV_STEREO3D_2D:
527             fpa_type = 0x08;
528             break;
529         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
530             fpa_type = 0x23;
531             break;
532         default:
533             fpa_type = 0;
534             break;
535         }
536
537         if (fpa_type != 0) {
538             put_header(s, USER_START_CODE);
539             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
540             put_bits(&s->pb, 8, 'P');
541             put_bits(&s->pb, 8, '3');
542             put_bits(&s->pb, 8, 'D');
543             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
544
545             put_bits(&s->pb, 1, 1);     // reserved_bit
546             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
547             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
548             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
549         }
550     }
551
552     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->a53_cc) {
553         side_data = av_frame_get_side_data(s->current_picture_ptr->f,
554             AV_FRAME_DATA_A53_CC);
555         if (side_data) {
556             if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
557                 int i = 0;
558
559                 put_header (s, USER_START_CODE);
560
561                 put_bits(&s->pb, 8, 'G');                   // user_identifier
562                 put_bits(&s->pb, 8, 'A');
563                 put_bits(&s->pb, 8, '9');
564                 put_bits(&s->pb, 8, '4');
565                 put_bits(&s->pb, 8, 3);                     // user_data_type_code
566                 put_bits(&s->pb, 8,
567                     (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
568                 put_bits(&s->pb, 8, 0xff);                  // em_data
569
570                 for (i = 0; i < side_data->size; i++)
571                     put_bits(&s->pb, 8, side_data->data[i]);
572
573                 put_bits(&s->pb, 8, 0xff);                  // marker_bits
574             } else {
575                 av_log(s->avctx, AV_LOG_WARNING,
576                     "Warning Closed Caption size (%d) can not exceed 93 bytes "
577                     "and must be a multiple of 3\n", side_data->size);
578             }
579         }
580     }
581
582     s->mb_y = 0;
583     ff_mpeg1_encode_slice_header(s);
584 }
585
586 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
587                                 int has_mv, int field_motion)
588 {
589     put_bits(&s->pb, n, bits);
590     if (!s->frame_pred_frame_dct) {
591         if (has_mv)
592             /* motion_type: frame/field */
593             put_bits(&s->pb, 2, 2 - field_motion);
594         put_bits(&s->pb, 1, s->interlaced_dct);
595     }
596 }
597
598 // RAL: Parameter added: f_or_b_code
599 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
600 {
601     if (val == 0) {
602         /* zero vector */
603         put_bits(&s->pb,
604                  ff_mpeg12_mbMotionVectorTable[0][1],
605                  ff_mpeg12_mbMotionVectorTable[0][0]);
606     } else {
607         int code, sign, bits;
608         int bit_size = f_or_b_code - 1;
609         int range    = 1 << bit_size;
610         /* modulo encoding */
611         val = sign_extend(val, 5 + bit_size);
612
613         if (val >= 0) {
614             val--;
615             code = (val >> bit_size) + 1;
616             bits = val & (range - 1);
617             sign = 0;
618         } else {
619             val = -val;
620             val--;
621             code = (val >> bit_size) + 1;
622             bits = val & (range - 1);
623             sign = 1;
624         }
625
626         av_assert2(code > 0 && code <= 16);
627
628         put_bits(&s->pb,
629                  ff_mpeg12_mbMotionVectorTable[code][1],
630                  ff_mpeg12_mbMotionVectorTable[code][0]);
631
632         put_bits(&s->pb, 1, sign);
633         if (bit_size > 0)
634             put_bits(&s->pb, bit_size, bits);
635     }
636 }
637
638 static inline void encode_dc(MpegEncContext *s, int diff, int component)
639 {
640     unsigned int diff_u = diff + 255;
641     if (diff_u >= 511) {
642         int index;
643
644         if (diff < 0) {
645             index = av_log2_16bit(-2 * diff);
646             diff--;
647         } else {
648             index = av_log2_16bit(2 * diff);
649         }
650         if (component == 0)
651             put_bits(&s->pb,
652                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
653                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
654                      av_mod_uintp2(diff, index));
655         else
656             put_bits(&s->pb,
657                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
658                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
659                      av_mod_uintp2(diff, index));
660     } else {
661         if (component == 0)
662             put_bits(&s->pb,
663                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
664                      mpeg1_lum_dc_uni[diff + 255] >> 8);
665         else
666             put_bits(&s->pb,
667                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
668                      mpeg1_chr_dc_uni[diff + 255] >> 8);
669     }
670 }
671
672 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
673 {
674     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
675     int code, component;
676     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
677
678     last_index = s->block_last_index[n];
679
680     /* DC coef */
681     if (s->mb_intra) {
682         component = (n <= 3 ? 0 : (n & 1) + 1);
683         dc        = block[0];                   /* overflow is impossible */
684         diff      = dc - s->last_dc[component];
685         encode_dc(s, diff, component);
686         s->last_dc[component] = dc;
687         i = 1;
688         if (s->intra_vlc_format)
689             table_vlc = ff_rl_mpeg2.table_vlc;
690     } else {
691         /* encode the first coefficient: needs to be done here because
692          * it is handled slightly differently */
693         level = block[0];
694         if (abs(level) == 1) {
695             code = ((uint32_t)level >> 31);     /* the sign bit */
696             put_bits(&s->pb, 2, code | 0x02);
697             i = 1;
698         } else {
699             i             = 0;
700             last_non_zero = -1;
701             goto next_coef;
702         }
703     }
704
705     /* now quantify & encode AC coefs */
706     last_non_zero = i - 1;
707
708     for (; i <= last_index; i++) {
709         j     = s->intra_scantable.permutated[i];
710         level = block[j];
711
712 next_coef:
713         /* encode using VLC */
714         if (level != 0) {
715             run = i - last_non_zero - 1;
716
717             alevel = level;
718             MASK_ABS(sign, alevel);
719             sign &= 1;
720
721             if (alevel <= mpeg1_max_level[0][run]) {
722                 code = mpeg1_index_run[0][run] + alevel - 1;
723                 /* store the VLC & sign at once */
724                 put_bits(&s->pb, table_vlc[code][1] + 1,
725                          (table_vlc[code][0] << 1) + sign);
726             } else {
727                 /* escape seems to be pretty rare <5% so I do not optimize it */
728                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
729                 /* escape: only clip in this case */
730                 put_bits(&s->pb, 6, run);
731                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
732                     if (alevel < 128) {
733                         put_sbits(&s->pb, 8, level);
734                     } else {
735                         if (level < 0)
736                             put_bits(&s->pb, 16, 0x8001 + level + 255);
737                         else
738                             put_sbits(&s->pb, 16, level);
739                     }
740                 } else {
741                     put_sbits(&s->pb, 12, level);
742                 }
743             }
744             last_non_zero = i;
745         }
746     }
747     /* end of block */
748     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
749 }
750
751 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
752                                                       int16_t block[8][64],
753                                                       int motion_x, int motion_y,
754                                                       int mb_block_count)
755 {
756     int i, cbp;
757     const int mb_x     = s->mb_x;
758     const int mb_y     = s->mb_y;
759     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
760
761     /* compute cbp */
762     cbp = 0;
763     for (i = 0; i < mb_block_count; i++)
764         if (s->block_last_index[i] >= 0)
765             cbp |= 1 << (mb_block_count - 1 - i);
766
767     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
768         (mb_x != s->mb_width - 1 ||
769          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
770         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
771          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
772           (((s->mv_dir & MV_DIR_FORWARD)
773             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
774                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
775            ((s->mv_dir & MV_DIR_BACKWARD)
776             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
777                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
778         s->mb_skip_run++;
779         s->qscale -= s->dquant;
780         s->skip_count++;
781         s->misc_bits++;
782         s->last_bits++;
783         if (s->pict_type == AV_PICTURE_TYPE_P) {
784             s->last_mv[0][0][0] =
785             s->last_mv[0][0][1] =
786             s->last_mv[0][1][0] =
787             s->last_mv[0][1][1] = 0;
788         }
789     } else {
790         if (first_mb) {
791             av_assert0(s->mb_skip_run == 0);
792             encode_mb_skip_run(s, s->mb_x);
793         } else {
794             encode_mb_skip_run(s, s->mb_skip_run);
795         }
796
797         if (s->pict_type == AV_PICTURE_TYPE_I) {
798             if (s->dquant && cbp) {
799                 /* macroblock_type: macroblock_quant = 1 */
800                 put_mb_modes(s, 2, 1, 0, 0);
801                 put_qscale(s);
802             } else {
803                 /* macroblock_type: macroblock_quant = 0 */
804                 put_mb_modes(s, 1, 1, 0, 0);
805                 s->qscale -= s->dquant;
806             }
807             s->misc_bits += get_bits_diff(s);
808             s->i_count++;
809         } else if (s->mb_intra) {
810             if (s->dquant && cbp) {
811                 put_mb_modes(s, 6, 0x01, 0, 0);
812                 put_qscale(s);
813             } else {
814                 put_mb_modes(s, 5, 0x03, 0, 0);
815                 s->qscale -= s->dquant;
816             }
817             s->misc_bits += get_bits_diff(s);
818             s->i_count++;
819             memset(s->last_mv, 0, sizeof(s->last_mv));
820         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
821             if (s->mv_type == MV_TYPE_16X16) {
822                 if (cbp != 0) {
823                     if ((motion_x | motion_y) == 0) {
824                         if (s->dquant) {
825                             /* macroblock_pattern & quant */
826                             put_mb_modes(s, 5, 1, 0, 0);
827                             put_qscale(s);
828                         } else {
829                             /* macroblock_pattern only */
830                             put_mb_modes(s, 2, 1, 0, 0);
831                         }
832                         s->misc_bits += get_bits_diff(s);
833                     } else {
834                         if (s->dquant) {
835                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
836                             put_qscale(s);
837                         } else {
838                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
839                         }
840                         s->misc_bits += get_bits_diff(s);
841                         // RAL: f_code parameter added
842                         mpeg1_encode_motion(s,
843                                             motion_x - s->last_mv[0][0][0],
844                                             s->f_code);
845                         // RAL: f_code parameter added
846                         mpeg1_encode_motion(s,
847                                             motion_y - s->last_mv[0][0][1],
848                                             s->f_code);
849                         s->mv_bits += get_bits_diff(s);
850                     }
851                 } else {
852                     put_bits(&s->pb, 3, 1);         /* motion only */
853                     if (!s->frame_pred_frame_dct)
854                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
855                     s->misc_bits += get_bits_diff(s);
856                     // RAL: f_code parameter added
857                     mpeg1_encode_motion(s,
858                                         motion_x - s->last_mv[0][0][0],
859                                         s->f_code);
860                     // RAL: f_code parameter added
861                     mpeg1_encode_motion(s,
862                                         motion_y - s->last_mv[0][0][1],
863                                         s->f_code);
864                     s->qscale  -= s->dquant;
865                     s->mv_bits += get_bits_diff(s);
866                 }
867                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
868                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
869             } else {
870                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
871
872                 if (cbp) {
873                     if (s->dquant) {
874                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
875                         put_qscale(s);
876                     } else {
877                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
878                     }
879                 } else {
880                     put_bits(&s->pb, 3, 1);             /* motion only */
881                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
882                     s->qscale -= s->dquant;
883                 }
884                 s->misc_bits += get_bits_diff(s);
885                 for (i = 0; i < 2; i++) {
886                     put_bits(&s->pb, 1, s->field_select[0][i]);
887                     mpeg1_encode_motion(s,
888                                         s->mv[0][i][0] - s->last_mv[0][i][0],
889                                         s->f_code);
890                     mpeg1_encode_motion(s,
891                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
892                                         s->f_code);
893                     s->last_mv[0][i][0] = s->mv[0][i][0];
894                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
895                 }
896                 s->mv_bits += get_bits_diff(s);
897             }
898             if (cbp) {
899                 if (s->chroma_y_shift) {
900                     put_bits(&s->pb,
901                              ff_mpeg12_mbPatTable[cbp][1],
902                              ff_mpeg12_mbPatTable[cbp][0]);
903                 } else {
904                     put_bits(&s->pb,
905                              ff_mpeg12_mbPatTable[cbp >> 2][1],
906                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
907                     put_sbits(&s->pb, 2, cbp);
908                 }
909             }
910             s->f_count++;
911         } else {
912             if (s->mv_type == MV_TYPE_16X16) {
913                 if (cbp) {                      // With coded bloc pattern
914                     if (s->dquant) {
915                         if (s->mv_dir == MV_DIR_FORWARD)
916                             put_mb_modes(s, 6, 3, 1, 0);
917                         else
918                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
919                         put_qscale(s);
920                     } else {
921                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
922                     }
923                 } else {                        // No coded bloc pattern
924                     put_bits(&s->pb, 5 - s->mv_dir, 2);
925                     if (!s->frame_pred_frame_dct)
926                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
927                     s->qscale -= s->dquant;
928                 }
929                 s->misc_bits += get_bits_diff(s);
930                 if (s->mv_dir & MV_DIR_FORWARD) {
931                     mpeg1_encode_motion(s,
932                                         s->mv[0][0][0] - s->last_mv[0][0][0],
933                                         s->f_code);
934                     mpeg1_encode_motion(s,
935                                         s->mv[0][0][1] - s->last_mv[0][0][1],
936                                         s->f_code);
937                     s->last_mv[0][0][0] =
938                     s->last_mv[0][1][0] = s->mv[0][0][0];
939                     s->last_mv[0][0][1] =
940                     s->last_mv[0][1][1] = s->mv[0][0][1];
941                     s->f_count++;
942                 }
943                 if (s->mv_dir & MV_DIR_BACKWARD) {
944                     mpeg1_encode_motion(s,
945                                         s->mv[1][0][0] - s->last_mv[1][0][0],
946                                         s->b_code);
947                     mpeg1_encode_motion(s,
948                                         s->mv[1][0][1] - s->last_mv[1][0][1],
949                                         s->b_code);
950                     s->last_mv[1][0][0] =
951                     s->last_mv[1][1][0] = s->mv[1][0][0];
952                     s->last_mv[1][0][1] =
953                     s->last_mv[1][1][1] = s->mv[1][0][1];
954                     s->b_count++;
955                 }
956             } else {
957                 av_assert2(s->mv_type == MV_TYPE_FIELD);
958                 av_assert2(!s->frame_pred_frame_dct);
959                 if (cbp) {                      // With coded bloc pattern
960                     if (s->dquant) {
961                         if (s->mv_dir == MV_DIR_FORWARD)
962                             put_mb_modes(s, 6, 3, 1, 1);
963                         else
964                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
965                         put_qscale(s);
966                     } else {
967                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
968                     }
969                 } else {                        // No coded bloc pattern
970                     put_bits(&s->pb, 5 - s->mv_dir, 2);
971                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
972                     s->qscale -= s->dquant;
973                 }
974                 s->misc_bits += get_bits_diff(s);
975                 if (s->mv_dir & MV_DIR_FORWARD) {
976                     for (i = 0; i < 2; i++) {
977                         put_bits(&s->pb, 1, s->field_select[0][i]);
978                         mpeg1_encode_motion(s,
979                                             s->mv[0][i][0] - s->last_mv[0][i][0],
980                                             s->f_code);
981                         mpeg1_encode_motion(s,
982                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
983                                             s->f_code);
984                         s->last_mv[0][i][0] = s->mv[0][i][0];
985                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
986                     }
987                     s->f_count++;
988                 }
989                 if (s->mv_dir & MV_DIR_BACKWARD) {
990                     for (i = 0; i < 2; i++) {
991                         put_bits(&s->pb, 1, s->field_select[1][i]);
992                         mpeg1_encode_motion(s,
993                                             s->mv[1][i][0] - s->last_mv[1][i][0],
994                                             s->b_code);
995                         mpeg1_encode_motion(s,
996                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
997                                             s->b_code);
998                         s->last_mv[1][i][0] = s->mv[1][i][0];
999                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1000                     }
1001                     s->b_count++;
1002                 }
1003             }
1004             s->mv_bits += get_bits_diff(s);
1005             if (cbp) {
1006                 if (s->chroma_y_shift) {
1007                     put_bits(&s->pb,
1008                              ff_mpeg12_mbPatTable[cbp][1],
1009                              ff_mpeg12_mbPatTable[cbp][0]);
1010                 } else {
1011                     put_bits(&s->pb,
1012                              ff_mpeg12_mbPatTable[cbp >> 2][1],
1013                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
1014                     put_sbits(&s->pb, 2, cbp);
1015                 }
1016             }
1017         }
1018         for (i = 0; i < mb_block_count; i++)
1019             if (cbp & (1 << (mb_block_count - 1 - i)))
1020                 mpeg1_encode_block(s, block[i], i);
1021         s->mb_skip_run = 0;
1022         if (s->mb_intra)
1023             s->i_tex_bits += get_bits_diff(s);
1024         else
1025             s->p_tex_bits += get_bits_diff(s);
1026     }
1027 }
1028
1029 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1030                         int motion_x, int motion_y)
1031 {
1032     if (s->chroma_format == CHROMA_420)
1033         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1034     else
1035         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1036 }
1037
1038 static av_cold void mpeg12_encode_init_static(void)
1039 {
1040         int f_code;
1041         int mv;
1042         int i;
1043
1044         ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1045         ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1046
1047         for (i = 0; i < 64; i++) {
1048             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1049             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1050         }
1051
1052         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1053             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1054
1055         /* build unified dc encoding tables */
1056         for (i = -255; i < 256; i++) {
1057             int adiff, index;
1058             int bits, code;
1059             int diff = i;
1060
1061             adiff = FFABS(diff);
1062             if (diff < 0)
1063                 diff--;
1064             index = av_log2(2 * adiff);
1065
1066             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1067             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1068                     av_mod_uintp2(diff, index);
1069             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1070
1071             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1072             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1073                     av_mod_uintp2(diff, index);
1074             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1075         }
1076
1077         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1078             for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1079                 int len;
1080
1081                 if (mv == 0) {
1082                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1083                 } else {
1084                     int val, bit_size, code;
1085
1086                     bit_size = f_code - 1;
1087
1088                     val = mv;
1089                     if (val < 0)
1090                         val = -val;
1091                     val--;
1092                     code = (val >> bit_size) + 1;
1093                     if (code < 17)
1094                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1095                               1 + bit_size;
1096                     else
1097                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1098                               2 + bit_size;
1099                 }
1100
1101                 mv_penalty[f_code][mv + MAX_DMV] = len;
1102             }
1103
1104
1105         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1106             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1107                 fcode_tab[mv + MAX_MV] = f_code;
1108 }
1109
1110 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1111 {
1112     static AVOnce init_static_once = AV_ONCE_INIT;
1113
1114     ff_mpeg12_common_init(s);
1115
1116     s->me.mv_penalty = mv_penalty;
1117     s->fcode_tab     = fcode_tab;
1118     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1119         s->min_qcoeff = -255;
1120         s->max_qcoeff = 255;
1121     } else {
1122         s->min_qcoeff = -2047;
1123         s->max_qcoeff = 2047;
1124     }
1125     if (s->intra_vlc_format) {
1126         s->intra_ac_vlc_length      =
1127         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1128     } else {
1129         s->intra_ac_vlc_length      =
1130         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1131     }
1132     s->inter_ac_vlc_length      =
1133     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1134
1135     ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1136 }
1137
1138 #define OFFSET(x) offsetof(MpegEncContext, x)
1139 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1140 #define COMMON_OPTS                                                           \
1141     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.",   \
1142       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1143     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1144       OFFSET(intra_vlc_format),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1145     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1146       OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1147     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1148       OFFSET(scan_offset),         AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1149     { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1150       OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1151
1152 static const AVOption mpeg1_options[] = {
1153     COMMON_OPTS
1154     FF_MPV_COMMON_OPTS
1155     { NULL },
1156 };
1157
1158 static const AVOption mpeg2_options[] = {
1159     COMMON_OPTS
1160     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1161     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1162     { "seq_disp_ext",     "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1163     {     "auto",   NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = -1},  0, 0, VE, "seq_disp_ext" },
1164     {     "never",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 0 },  0, 0, VE, "seq_disp_ext" },
1165     {     "always", NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 1 },  0, 0, VE, "seq_disp_ext" },
1166     { "video_format",     "Video_format in the sequence_display_extension indicating the source of the video.", OFFSET(video_format), AV_OPT_TYPE_INT, { .i64 = VIDEO_FORMAT_UNSPECIFIED }, 0, 7, VE, "video_format" },
1167     {     "component",    NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_COMPONENT  },  0, 0, VE, "video_format" },
1168     {     "pal",          NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_PAL        },  0, 0, VE, "video_format" },
1169     {     "ntsc",         NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_NTSC       },  0, 0, VE, "video_format" },
1170     {     "secam",        NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_SECAM      },  0, 0, VE, "video_format" },
1171     {     "mac",          NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_MAC        },  0, 0, VE, "video_format" },
1172     {     "unspecified",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_UNSPECIFIED},  0, 0, VE, "video_format" },
1173 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "avctx.level"
1174     { LEVEL("high",     4) },
1175     { LEVEL("high1440", 6) },
1176     { LEVEL("main",     8) },
1177     { LEVEL("low",     10) },
1178 #undef LEVEL
1179     FF_MPV_COMMON_OPTS
1180     FF_MPEG2_PROFILE_OPTS
1181     { NULL },
1182 };
1183
1184 #define mpeg12_class(x)                                 \
1185 static const AVClass mpeg ## x ## _class = {            \
1186     .class_name = "mpeg" # x "video encoder",           \
1187     .item_name  = av_default_item_name,                 \
1188     .option     = mpeg ## x ## _options,                \
1189     .version    = LIBAVUTIL_VERSION_INT,                \
1190 };
1191
1192 mpeg12_class(1)
1193 mpeg12_class(2)
1194
1195 AVCodec ff_mpeg1video_encoder = {
1196     .name                 = "mpeg1video",
1197     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1198     .type                 = AVMEDIA_TYPE_VIDEO,
1199     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1200     .priv_data_size       = sizeof(MpegEncContext),
1201     .init                 = encode_init,
1202     .encode2              = ff_mpv_encode_picture,
1203     .close                = ff_mpv_encode_end,
1204     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1205     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1206                                                            AV_PIX_FMT_NONE },
1207     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1208     .caps_internal        = FF_CODEC_CAP_INIT_CLEANUP,
1209     .priv_class           = &mpeg1_class,
1210 };
1211
1212 AVCodec ff_mpeg2video_encoder = {
1213     .name                 = "mpeg2video",
1214     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1215     .type                 = AVMEDIA_TYPE_VIDEO,
1216     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1217     .priv_data_size       = sizeof(MpegEncContext),
1218     .init                 = encode_init,
1219     .encode2              = ff_mpv_encode_picture,
1220     .close                = ff_mpv_encode_end,
1221     .supported_framerates = ff_mpeg2_frame_rate_tab,
1222     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1223                                                            AV_PIX_FMT_YUV422P,
1224                                                            AV_PIX_FMT_NONE },
1225     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1226     .caps_internal        = FF_CODEC_CAP_INIT_CLEANUP,
1227     .priv_class           = &mpeg2_class,
1228 };