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Merge commit '67bb3a4e285a5871770cbaa2d78bf9024961dd0f'
[ffmpeg] / 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
25  * MPEG1/2 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/timecode.h"
35 #include "libavutil/stereo3d.h"
36
37 #include "avcodec.h"
38 #include "bytestream.h"
39 #include "mathops.h"
40 #include "mpeg12.h"
41 #include "mpeg12data.h"
42 #include "mpegvideo.h"
43
44
45 static const uint8_t inv_non_linear_qscale[] = {
46     0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
47 };
48
49 static const uint8_t svcd_scan_offset_placeholder[] = {
50     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
51     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
52 };
53
54 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
55 static uint8_t fcode_tab[MAX_MV * 2 + 1];
56
57 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
58 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
59
60 /* simple include everything table for dc, first byte is bits
61  * 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 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     MpegEncContext *s = avctx->priv_data;
145
146     if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
147         avctx->thread_count = 1;
148
149     if (ff_MPV_encode_init(avctx) < 0)
150         return -1;
151
152     if (find_frame_rate_index(s) < 0) {
153         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
154             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
155                    avctx->time_base.den, avctx->time_base.num);
156             return -1;
157         } else {
158             av_log(avctx, AV_LOG_INFO,
159                    "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
160                    avctx->time_base.den, avctx->time_base.num);
161         }
162     }
163
164     if (avctx->profile == FF_PROFILE_UNKNOWN) {
165         if (avctx->level != FF_LEVEL_UNKNOWN) {
166             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
167             return -1;
168         }
169         /* Main or 4:2:2 */
170         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
171     }
172
173     if (avctx->level == FF_LEVEL_UNKNOWN) {
174         if (avctx->profile == 0) {                  /* 4:2:2 */
175             if (avctx->width <= 720 && avctx->height <= 608)
176                 avctx->level = 5;                   /* Main */
177             else
178                 avctx->level = 2;                   /* High */
179         } else {
180             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
181                 av_log(avctx, AV_LOG_ERROR,
182                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
183                 return -1;
184             }
185             if (avctx->width <= 720 && avctx->height <= 576)
186                 avctx->level = 8;                   /* Main */
187             else if (avctx->width <= 1440)
188                 avctx->level = 6;                   /* High 1440 */
189             else
190                 avctx->level = 4;                   /* High */
191         }
192     }
193
194     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
195         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
196         return AVERROR(EINVAL);
197     }
198
199     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
200         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
201             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
202                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
203             return AVERROR(EINVAL);
204         }
205     }
206
207     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
208     if (s->drop_frame_timecode)
209         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
210     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
211         av_log(avctx, AV_LOG_ERROR,
212                "Drop frame time code only allowed with 1001/30000 fps\n");
213         return -1;
214     }
215
216     if (s->tc_opt_str) {
217         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
218         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
219         if (ret < 0)
220             return ret;
221         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
222         s->avctx->timecode_frame_start = s->tc.start;
223     } else {
224         s->avctx->timecode_frame_start = 0; // default is -1
225     }
226     return 0;
227 }
228
229 static void put_header(MpegEncContext *s, int header)
230 {
231     avpriv_align_put_bits(&s->pb);
232     put_bits(&s->pb, 16, header >> 16);
233     put_sbits(&s->pb, 16, header);
234 }
235
236 /* put sequence header if needed */
237 static void mpeg1_encode_sequence_header(MpegEncContext *s)
238 {
239     unsigned int vbv_buffer_size, fps, v;
240     int i, constraint_parameter_flag;
241     uint64_t time_code;
242     float best_aspect_error = 1E10;
243     float aspect_ratio      = av_q2d(s->avctx->sample_aspect_ratio);
244
245     if (aspect_ratio == 0.0)
246         aspect_ratio = 1.0;             // pixel aspect 1.1 (VGA)
247
248     if (s->current_picture.f.key_frame) {
249         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
250
251         /* mpeg1 header repeated every gop */
252         put_header(s, SEQ_START_CODE);
253
254         put_sbits(&s->pb, 12, s->width  & 0xFFF);
255         put_sbits(&s->pb, 12, s->height & 0xFFF);
256
257         for (i = 1; i < 15; i++) {
258             float error = aspect_ratio;
259             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
260                 error -= 1.0 / ff_mpeg1_aspect[i];
261             else
262                 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
263
264             error = FFABS(error);
265
266             if (error < best_aspect_error) {
267                 best_aspect_error    = error;
268                 s->aspect_ratio_info = i;
269             }
270         }
271
272         put_bits(&s->pb, 4, s->aspect_ratio_info);
273         put_bits(&s->pb, 4, s->frame_rate_index);
274
275         if (s->avctx->rc_max_rate) {
276             v = (s->avctx->rc_max_rate + 399) / 400;
277             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
278                 v = 0x3ffff;
279         } else {
280             v = 0x3FFFF;
281         }
282
283         if (s->avctx->rc_buffer_size)
284             vbv_buffer_size = s->avctx->rc_buffer_size;
285         else
286             /* VBV calculation: Scaled so that a VCD has the proper
287              * VBV size of 40 kilobytes */
288             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
289         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
290
291         put_sbits(&s->pb, 18, v);
292         put_bits(&s->pb, 1, 1);         // marker
293         put_sbits(&s->pb, 10, vbv_buffer_size);
294
295         constraint_parameter_flag =
296             s->width  <= 768                                    &&
297             s->height <= 576                                    &&
298             s->mb_width * s->mb_height                 <= 396   &&
299             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
300             framerate.num <= framerate.den * 30                 &&
301             s->avctx->me_range                                  &&
302             s->avctx->me_range < 128                            &&
303             vbv_buffer_size <= 20                               &&
304             v <= 1856000 / 400                                  &&
305             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
306
307         put_bits(&s->pb, 1, constraint_parameter_flag);
308
309         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
310         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
311
312         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
313             put_header(s, EXT_START_CODE);
314             put_bits(&s->pb, 4, 1);                 // seq ext
315
316             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
317
318             put_bits(&s->pb, 3, s->avctx->profile); // profile
319             put_bits(&s->pb, 4, s->avctx->level);   // level
320
321             put_bits(&s->pb, 1, s->progressive_sequence);
322             put_bits(&s->pb, 2, s->chroma_format);
323             put_bits(&s->pb, 2, s->width  >> 12);
324             put_bits(&s->pb, 2, s->height >> 12);
325             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
326             put_bits(&s->pb, 1, 1);                 // marker
327             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
328             put_bits(&s->pb, 1, s->low_delay);
329             put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
330             put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
331         }
332
333         put_header(s, GOP_START_CODE);
334         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
335         /* time code: we must convert from the real frame rate to a
336          * fake MPEG frame rate in case of low frame rate */
337         fps       = (framerate.num + framerate.den / 2) / framerate.den;
338         time_code = s->current_picture_ptr->f.coded_picture_number +
339                     s->avctx->timecode_frame_start;
340
341         s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
342
343         av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
344         if (s->drop_frame_timecode)
345             time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
346
347         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
348         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
349         put_bits(&s->pb, 1, 1);
350         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
351         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
352         put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
353         put_bits(&s->pb, 1, 0);                     // broken link
354     }
355 }
356
357 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
358 {
359     while (run >= 33) {
360         put_bits(&s->pb, 11, 0x008);
361         run -= 33;
362     }
363     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
364              ff_mpeg12_mbAddrIncrTable[run][0]);
365 }
366
367 static av_always_inline void put_qscale(MpegEncContext *s)
368 {
369     if (s->q_scale_type) {
370         av_assert2(s->qscale >= 1 && s->qscale <= 12);
371         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
372     } else {
373         put_bits(&s->pb, 5, s->qscale);
374     }
375 }
376
377 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
378 {
379     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
380         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
381         /* slice_vertical_position_extension */
382         put_bits(&s->pb, 3, s->mb_y >> 7);
383     } else {
384         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
385     }
386     put_qscale(s);
387     /* slice extra information */
388     put_bits(&s->pb, 1, 0);
389 }
390
391 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
392 {
393     AVFrameSideData *side_data;
394     mpeg1_encode_sequence_header(s);
395
396     /* mpeg1 picture header */
397     put_header(s, PICTURE_START_CODE);
398     /* temporal reference */
399
400     // RAL: s->picture_number instead of s->fake_picture_number
401     put_bits(&s->pb, 10,
402              (s->picture_number - s->gop_picture_number) & 0x3ff);
403     put_bits(&s->pb, 3, s->pict_type);
404
405     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
406     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
407
408     // RAL: Forward f_code also needed for B-frames
409     if (s->pict_type == AV_PICTURE_TYPE_P ||
410         s->pict_type == AV_PICTURE_TYPE_B) {
411         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
412         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
413             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
414         else
415             put_bits(&s->pb, 3, 7);             /* forward_f_code */
416     }
417
418     // RAL: Backward f_code necessary for B-frames
419     if (s->pict_type == AV_PICTURE_TYPE_B) {
420         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
421         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
422             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
423         else
424             put_bits(&s->pb, 3, 7);             /* backward_f_code */
425     }
426
427     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
428
429     s->frame_pred_frame_dct = 1;
430     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
431         put_header(s, EXT_START_CODE);
432         put_bits(&s->pb, 4, 8);                 /* pic ext */
433         if (s->pict_type == AV_PICTURE_TYPE_P ||
434             s->pict_type == AV_PICTURE_TYPE_B) {
435             put_bits(&s->pb, 4, s->f_code);
436             put_bits(&s->pb, 4, s->f_code);
437         } else {
438             put_bits(&s->pb, 8, 255);
439         }
440         if (s->pict_type == AV_PICTURE_TYPE_B) {
441             put_bits(&s->pb, 4, s->b_code);
442             put_bits(&s->pb, 4, s->b_code);
443         } else {
444             put_bits(&s->pb, 8, 255);
445         }
446         put_bits(&s->pb, 2, s->intra_dc_precision);
447
448         av_assert0(s->picture_structure == PICT_FRAME);
449         put_bits(&s->pb, 2, s->picture_structure);
450         if (s->progressive_sequence)
451             put_bits(&s->pb, 1, 0);             /* no repeat */
452         else
453             put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
454         /* XXX: optimize the generation of this flag with entropy measures */
455         s->frame_pred_frame_dct = s->progressive_sequence;
456
457         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
458         put_bits(&s->pb, 1, s->concealment_motion_vectors);
459         put_bits(&s->pb, 1, s->q_scale_type);
460         put_bits(&s->pb, 1, s->intra_vlc_format);
461         put_bits(&s->pb, 1, s->alternate_scan);
462         put_bits(&s->pb, 1, s->repeat_first_field);
463         s->progressive_frame = s->progressive_sequence;
464         /* chroma_420_type */
465         put_bits(&s->pb, 1, s->chroma_format ==
466                             CHROMA_420 ? s->progressive_frame : 0);
467         put_bits(&s->pb, 1, s->progressive_frame);
468         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
469     }
470     if (s->scan_offset) {
471         int i;
472
473         put_header(s, USER_START_CODE);
474         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
475             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
476     }
477     side_data = av_frame_get_side_data(&s->current_picture_ptr->f,
478                                        AV_FRAME_DATA_STEREO3D);
479     if (side_data) {
480         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
481         uint8_t fpa_type;
482
483         switch (stereo->type) {
484         case AV_STEREO3D_SIDEBYSIDE:
485             fpa_type = 0x03;
486             break;
487         case AV_STEREO3D_TOPBOTTOM:
488             fpa_type = 0x04;
489             break;
490         case AV_STEREO3D_2D:
491             fpa_type = 0x08;
492             break;
493         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
494             fpa_type = 0x23;
495             break;
496         default:
497             fpa_type = 0;
498             break;
499         }
500
501         if (fpa_type != 0) {
502             put_header(s, USER_START_CODE);
503             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
504             put_bits(&s->pb, 8, 'P');
505             put_bits(&s->pb, 8, '3');
506             put_bits(&s->pb, 8, 'D');
507             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
508
509             put_bits(&s->pb, 1, 1);     // reserved_bit
510             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
511             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
512             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
513         }
514     }
515
516     s->mb_y = 0;
517     ff_mpeg1_encode_slice_header(s);
518 }
519
520 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
521                                 int has_mv, int field_motion)
522 {
523     put_bits(&s->pb, n, bits);
524     if (!s->frame_pred_frame_dct) {
525         if (has_mv)
526             /* motion_type: frame/field */
527             put_bits(&s->pb, 2, 2 - field_motion);
528         put_bits(&s->pb, 1, s->interlaced_dct);
529     }
530 }
531
532 // RAL: Parameter added: f_or_b_code
533 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
534 {
535     if (val == 0) {
536         /* zero vector */
537         put_bits(&s->pb,
538                  ff_mpeg12_mbMotionVectorTable[0][1],
539                  ff_mpeg12_mbMotionVectorTable[0][0]);
540     } else {
541         int code, sign, bits;
542         int bit_size = f_or_b_code - 1;
543         int range    = 1 << bit_size;
544         /* modulo encoding */
545         val = sign_extend(val, 5 + bit_size);
546
547         if (val >= 0) {
548             val--;
549             code = (val >> bit_size) + 1;
550             bits = val & (range - 1);
551             sign = 0;
552         } else {
553             val = -val;
554             val--;
555             code = (val >> bit_size) + 1;
556             bits = val & (range - 1);
557             sign = 1;
558         }
559
560         av_assert2(code > 0 && code <= 16);
561
562         put_bits(&s->pb,
563                  ff_mpeg12_mbMotionVectorTable[code][1],
564                  ff_mpeg12_mbMotionVectorTable[code][0]);
565
566         put_bits(&s->pb, 1, sign);
567         if (bit_size > 0)
568             put_bits(&s->pb, bit_size, bits);
569     }
570 }
571
572 static inline void encode_dc(MpegEncContext *s, int diff, int component)
573 {
574     if (((unsigned) (diff + 255)) >= 511) {
575         int index;
576
577         if (diff < 0) {
578             index = av_log2_16bit(-2 * diff);
579             diff--;
580         } else {
581             index = av_log2_16bit(2 * diff);
582         }
583         if (component == 0)
584             put_bits(&s->pb,
585                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
586                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
587                      (diff & ((1 << index) - 1)));
588         else
589             put_bits(&s->pb,
590                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
591                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
592                      (diff & ((1 << index) - 1)));
593     } else {
594         if (component == 0)
595             put_bits(&s->pb,
596                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
597                      mpeg1_lum_dc_uni[diff + 255] >> 8);
598         else
599             put_bits(&s->pb,
600                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
601                      mpeg1_chr_dc_uni[diff + 255] >> 8);
602     }
603 }
604
605 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
606 {
607     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
608     int code, component;
609     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
610
611     last_index = s->block_last_index[n];
612
613     /* DC coef */
614     if (s->mb_intra) {
615         component = (n <= 3 ? 0 : (n & 1) + 1);
616         dc        = block[0];                   /* overflow is impossible */
617         diff      = dc - s->last_dc[component];
618         encode_dc(s, diff, component);
619         s->last_dc[component] = dc;
620         i = 1;
621         if (s->intra_vlc_format)
622             table_vlc = ff_rl_mpeg2.table_vlc;
623     } else {
624         /* encode the first coefficient: needs to be done here because
625          * it is handled slightly differently */
626         level = block[0];
627         if (abs(level) == 1) {
628             code = ((uint32_t)level >> 31);     /* the sign bit */
629             put_bits(&s->pb, 2, code | 0x02);
630             i = 1;
631         } else {
632             i             = 0;
633             last_non_zero = -1;
634             goto next_coef;
635         }
636     }
637
638     /* now quantify & encode AC coefs */
639     last_non_zero = i - 1;
640
641     for (; i <= last_index; i++) {
642         j     = s->intra_scantable.permutated[i];
643         level = block[j];
644
645 next_coef:
646         /* encode using VLC */
647         if (level != 0) {
648             run = i - last_non_zero - 1;
649
650             alevel = level;
651             MASK_ABS(sign, alevel);
652             sign &= 1;
653
654             if (alevel <= mpeg1_max_level[0][run]) {
655                 code = mpeg1_index_run[0][run] + alevel - 1;
656                 /* store the VLC & sign at once */
657                 put_bits(&s->pb, table_vlc[code][1] + 1,
658                          (table_vlc[code][0] << 1) + sign);
659             } else {
660                 /* escape seems to be pretty rare <5% so I do not optimize it */
661                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
662                 /* escape: only clip in this case */
663                 put_bits(&s->pb, 6, run);
664                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
665                     if (alevel < 128) {
666                         put_sbits(&s->pb, 8, level);
667                     } else {
668                         if (level < 0)
669                             put_bits(&s->pb, 16, 0x8001 + level + 255);
670                         else
671                             put_sbits(&s->pb, 16, level);
672                     }
673                 } else {
674                     put_sbits(&s->pb, 12, level);
675                 }
676             }
677             last_non_zero = i;
678         }
679     }
680     /* end of block */
681     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
682 }
683
684 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
685                                                       int16_t block[6][64],
686                                                       int motion_x, int motion_y,
687                                                       int mb_block_count)
688 {
689     int i, cbp;
690     const int mb_x     = s->mb_x;
691     const int mb_y     = s->mb_y;
692     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
693
694     /* compute cbp */
695     cbp = 0;
696     for (i = 0; i < mb_block_count; i++)
697         if (s->block_last_index[i] >= 0)
698             cbp |= 1 << (mb_block_count - 1 - i);
699
700     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
701         (mb_x != s->mb_width - 1 ||
702          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
703         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
704          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
705           (((s->mv_dir & MV_DIR_FORWARD)
706             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
707                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
708            ((s->mv_dir & MV_DIR_BACKWARD)
709             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
710                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
711         s->mb_skip_run++;
712         s->qscale -= s->dquant;
713         s->skip_count++;
714         s->misc_bits++;
715         s->last_bits++;
716         if (s->pict_type == AV_PICTURE_TYPE_P) {
717             s->last_mv[0][0][0] =
718             s->last_mv[0][0][1] =
719             s->last_mv[0][1][0] =
720             s->last_mv[0][1][1] = 0;
721         }
722     } else {
723         if (first_mb) {
724             av_assert0(s->mb_skip_run == 0);
725             encode_mb_skip_run(s, s->mb_x);
726         } else {
727             encode_mb_skip_run(s, s->mb_skip_run);
728         }
729
730         if (s->pict_type == AV_PICTURE_TYPE_I) {
731             if (s->dquant && cbp) {
732                 /* macroblock_type: macroblock_quant = 1 */
733                 put_mb_modes(s, 2, 1, 0, 0);
734                 put_qscale(s);
735             } else {
736                 /* macroblock_type: macroblock_quant = 0 */
737                 put_mb_modes(s, 1, 1, 0, 0);
738                 s->qscale -= s->dquant;
739             }
740             s->misc_bits += get_bits_diff(s);
741             s->i_count++;
742         } else if (s->mb_intra) {
743             if (s->dquant && cbp) {
744                 put_mb_modes(s, 6, 0x01, 0, 0);
745                 put_qscale(s);
746             } else {
747                 put_mb_modes(s, 5, 0x03, 0, 0);
748                 s->qscale -= s->dquant;
749             }
750             s->misc_bits += get_bits_diff(s);
751             s->i_count++;
752             memset(s->last_mv, 0, sizeof(s->last_mv));
753         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
754             if (s->mv_type == MV_TYPE_16X16) {
755                 if (cbp != 0) {
756                     if ((motion_x | motion_y) == 0) {
757                         if (s->dquant) {
758                             /* macroblock_pattern & quant */
759                             put_mb_modes(s, 5, 1, 0, 0);
760                             put_qscale(s);
761                         } else {
762                             /* macroblock_pattern only */
763                             put_mb_modes(s, 2, 1, 0, 0);
764                         }
765                         s->misc_bits += get_bits_diff(s);
766                     } else {
767                         if (s->dquant) {
768                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
769                             put_qscale(s);
770                         } else {
771                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
772                         }
773                         s->misc_bits += get_bits_diff(s);
774                         // RAL: f_code parameter added
775                         mpeg1_encode_motion(s,
776                                             motion_x - s->last_mv[0][0][0],
777                                             s->f_code);
778                         // RAL: f_code parameter added
779                         mpeg1_encode_motion(s,
780                                             motion_y - s->last_mv[0][0][1],
781                                             s->f_code);
782                         s->mv_bits += get_bits_diff(s);
783                     }
784                 } else {
785                     put_bits(&s->pb, 3, 1);         /* motion only */
786                     if (!s->frame_pred_frame_dct)
787                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
788                     s->misc_bits += get_bits_diff(s);
789                     // RAL: f_code parameter added
790                     mpeg1_encode_motion(s,
791                                         motion_x - s->last_mv[0][0][0],
792                                         s->f_code);
793                     // RAL: f_code parameter added
794                     mpeg1_encode_motion(s,
795                                         motion_y - s->last_mv[0][0][1],
796                                         s->f_code);
797                     s->qscale  -= s->dquant;
798                     s->mv_bits += get_bits_diff(s);
799                 }
800                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
801                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
802             } else {
803                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
804
805                 if (cbp) {
806                     if (s->dquant) {
807                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
808                         put_qscale(s);
809                     } else {
810                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
811                     }
812                 } else {
813                     put_bits(&s->pb, 3, 1);             /* motion only */
814                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
815                     s->qscale -= s->dquant;
816                 }
817                 s->misc_bits += get_bits_diff(s);
818                 for (i = 0; i < 2; i++) {
819                     put_bits(&s->pb, 1, s->field_select[0][i]);
820                     mpeg1_encode_motion(s,
821                                         s->mv[0][i][0] - s->last_mv[0][i][0],
822                                         s->f_code);
823                     mpeg1_encode_motion(s,
824                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
825                                         s->f_code);
826                     s->last_mv[0][i][0] = s->mv[0][i][0];
827                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
828                 }
829                 s->mv_bits += get_bits_diff(s);
830             }
831             if (cbp) {
832                 if (s->chroma_y_shift) {
833                     put_bits(&s->pb,
834                              ff_mpeg12_mbPatTable[cbp][1],
835                              ff_mpeg12_mbPatTable[cbp][0]);
836                 } else {
837                     put_bits(&s->pb,
838                              ff_mpeg12_mbPatTable[cbp >> 2][1],
839                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
840                     put_sbits(&s->pb, 2, cbp);
841                 }
842             }
843             s->f_count++;
844         } else {
845             if (s->mv_type == MV_TYPE_16X16) {
846                 if (cbp) {                      // With coded bloc pattern
847                     if (s->dquant) {
848                         if (s->mv_dir == MV_DIR_FORWARD)
849                             put_mb_modes(s, 6, 3, 1, 0);
850                         else
851                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
852                         put_qscale(s);
853                     } else {
854                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
855                     }
856                 } else {                        // No coded bloc pattern
857                     put_bits(&s->pb, 5 - s->mv_dir, 2);
858                     if (!s->frame_pred_frame_dct)
859                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
860                     s->qscale -= s->dquant;
861                 }
862                 s->misc_bits += get_bits_diff(s);
863                 if (s->mv_dir & MV_DIR_FORWARD) {
864                     mpeg1_encode_motion(s,
865                                         s->mv[0][0][0] - s->last_mv[0][0][0],
866                                         s->f_code);
867                     mpeg1_encode_motion(s,
868                                         s->mv[0][0][1] - s->last_mv[0][0][1],
869                                         s->f_code);
870                     s->last_mv[0][0][0] =
871                     s->last_mv[0][1][0] = s->mv[0][0][0];
872                     s->last_mv[0][0][1] =
873                     s->last_mv[0][1][1] = s->mv[0][0][1];
874                     s->f_count++;
875                 }
876                 if (s->mv_dir & MV_DIR_BACKWARD) {
877                     mpeg1_encode_motion(s,
878                                         s->mv[1][0][0] - s->last_mv[1][0][0],
879                                         s->b_code);
880                     mpeg1_encode_motion(s,
881                                         s->mv[1][0][1] - s->last_mv[1][0][1],
882                                         s->b_code);
883                     s->last_mv[1][0][0] =
884                     s->last_mv[1][1][0] = s->mv[1][0][0];
885                     s->last_mv[1][0][1] =
886                     s->last_mv[1][1][1] = s->mv[1][0][1];
887                     s->b_count++;
888                 }
889             } else {
890                 av_assert2(s->mv_type == MV_TYPE_FIELD);
891                 av_assert2(!s->frame_pred_frame_dct);
892                 if (cbp) {                      // With coded bloc pattern
893                     if (s->dquant) {
894                         if (s->mv_dir == MV_DIR_FORWARD)
895                             put_mb_modes(s, 6, 3, 1, 1);
896                         else
897                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
898                         put_qscale(s);
899                     } else {
900                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
901                     }
902                 } else {                        // No coded bloc pattern
903                     put_bits(&s->pb, 5 - s->mv_dir, 2);
904                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
905                     s->qscale -= s->dquant;
906                 }
907                 s->misc_bits += get_bits_diff(s);
908                 if (s->mv_dir & MV_DIR_FORWARD) {
909                     for (i = 0; i < 2; i++) {
910                         put_bits(&s->pb, 1, s->field_select[0][i]);
911                         mpeg1_encode_motion(s,
912                                             s->mv[0][i][0] - s->last_mv[0][i][0],
913                                             s->f_code);
914                         mpeg1_encode_motion(s,
915                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
916                                             s->f_code);
917                         s->last_mv[0][i][0] = s->mv[0][i][0];
918                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
919                     }
920                     s->f_count++;
921                 }
922                 if (s->mv_dir & MV_DIR_BACKWARD) {
923                     for (i = 0; i < 2; i++) {
924                         put_bits(&s->pb, 1, s->field_select[1][i]);
925                         mpeg1_encode_motion(s,
926                                             s->mv[1][i][0] - s->last_mv[1][i][0],
927                                             s->b_code);
928                         mpeg1_encode_motion(s,
929                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
930                                             s->b_code);
931                         s->last_mv[1][i][0] = s->mv[1][i][0];
932                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
933                     }
934                     s->b_count++;
935                 }
936             }
937             s->mv_bits += get_bits_diff(s);
938             if (cbp) {
939                 if (s->chroma_y_shift) {
940                     put_bits(&s->pb,
941                              ff_mpeg12_mbPatTable[cbp][1],
942                              ff_mpeg12_mbPatTable[cbp][0]);
943                 } else {
944                     put_bits(&s->pb,
945                              ff_mpeg12_mbPatTable[cbp >> 2][1],
946                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
947                     put_sbits(&s->pb, 2, cbp);
948                 }
949             }
950         }
951         for (i = 0; i < mb_block_count; i++)
952             if (cbp & (1 << (mb_block_count - 1 - i)))
953                 mpeg1_encode_block(s, block[i], i);
954         s->mb_skip_run = 0;
955         if (s->mb_intra)
956             s->i_tex_bits += get_bits_diff(s);
957         else
958             s->p_tex_bits += get_bits_diff(s);
959     }
960 }
961
962 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
963                         int motion_x, int motion_y)
964 {
965     if (s->chroma_format == CHROMA_420)
966         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
967     else
968         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
969 }
970
971 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
972 {
973     static int done = 0;
974
975     ff_mpeg12_common_init(s);
976
977     if (!done) {
978         int f_code;
979         int mv;
980         int i;
981
982         done = 1;
983         ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
984         ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
985
986         for (i = 0; i < 64; i++) {
987             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
988             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
989         }
990
991         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
992         if (s->intra_vlc_format)
993             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
994
995         /* build unified dc encoding tables */
996         for (i = -255; i < 256; i++) {
997             int adiff, index;
998             int bits, code;
999             int diff = i;
1000
1001             adiff = FFABS(diff);
1002             if (diff < 0)
1003                 diff--;
1004             index = av_log2(2 * adiff);
1005
1006             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1007             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1008                    (diff & ((1 << index) - 1));
1009             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1010
1011             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1012             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1013                    (diff & ((1 << index) - 1));
1014             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1015         }
1016
1017         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1018             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1019                 int len;
1020
1021                 if (mv == 0) {
1022                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1023                 } else {
1024                     int val, bit_size, code;
1025
1026                     bit_size = f_code - 1;
1027
1028                     val = mv;
1029                     if (val < 0)
1030                         val = -val;
1031                     val--;
1032                     code = (val >> bit_size) + 1;
1033                     if (code < 17)
1034                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1035                               1 + bit_size;
1036                     else
1037                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1038                               2 + bit_size;
1039                 }
1040
1041                 mv_penalty[f_code][mv + MAX_MV] = len;
1042             }
1043
1044
1045         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1046             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1047                 fcode_tab[mv + MAX_MV] = f_code;
1048     }
1049     s->me.mv_penalty = mv_penalty;
1050     s->fcode_tab     = fcode_tab;
1051     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1052         s->min_qcoeff = -255;
1053         s->max_qcoeff = 255;
1054     } else {
1055         s->min_qcoeff = -2047;
1056         s->max_qcoeff = 2047;
1057     }
1058     if (s->intra_vlc_format) {
1059         s->intra_ac_vlc_length      =
1060         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1061     } else {
1062         s->intra_ac_vlc_length      =
1063         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1064     }
1065     s->inter_ac_vlc_length      =
1066     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1067 }
1068
1069 #define OFFSET(x) offsetof(MpegEncContext, x)
1070 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1071 #define COMMON_OPTS                                                           \
1072     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format",   \
1073       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1074     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1075       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1076     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1077       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1078     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1079       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1080
1081 static const AVOption mpeg1_options[] = {
1082     COMMON_OPTS
1083     FF_MPV_COMMON_OPTS
1084     { NULL },
1085 };
1086
1087 static const AVOption mpeg2_options[] = {
1088     COMMON_OPTS
1089     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1090     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1091     FF_MPV_COMMON_OPTS
1092     { NULL },
1093 };
1094
1095 #define mpeg12_class(x)                                 \
1096 static const AVClass mpeg ## x ## _class = {            \
1097     .class_name = "mpeg" # x "video encoder",           \
1098     .item_name  = av_default_item_name,                 \
1099     .option     = mpeg ## x ## _options,                \
1100     .version    = LIBAVUTIL_VERSION_INT,                \
1101 };
1102
1103 mpeg12_class(1)
1104 mpeg12_class(2)
1105
1106 AVCodec ff_mpeg1video_encoder = {
1107     .name                 = "mpeg1video",
1108     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1109     .type                 = AVMEDIA_TYPE_VIDEO,
1110     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1111     .priv_data_size       = sizeof(MpegEncContext),
1112     .init                 = encode_init,
1113     .encode2              = ff_MPV_encode_picture,
1114     .close                = ff_MPV_encode_end,
1115     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1116     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1117                                                            AV_PIX_FMT_NONE },
1118     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1119     .priv_class           = &mpeg1_class,
1120 };
1121
1122 AVCodec ff_mpeg2video_encoder = {
1123     .name                 = "mpeg2video",
1124     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1125     .type                 = AVMEDIA_TYPE_VIDEO,
1126     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1127     .priv_data_size       = sizeof(MpegEncContext),
1128     .init                 = encode_init,
1129     .encode2              = ff_MPV_encode_picture,
1130     .close                = ff_MPV_encode_end,
1131     .supported_framerates = ff_mpeg2_frame_rate_tab,
1132     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1133                                                            AV_PIX_FMT_YUV422P,
1134                                                            AV_PIX_FMT_NONE },
1135     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1136     .priv_class           = &mpeg2_class,
1137 };