a14a9f7f620d8ba09f6660188b5bfb2580ade5ec
[ffmpeg.git] / libavcodec / mpeg12enc.c
1 /*
2  * MPEG1/2 encoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 /**
24  * @file
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 "mpegutils.h"
43 #include "mpegvideo.h"
44
45
46 static const uint8_t inv_non_linear_qscale[] = {
47     0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
48 };
49
50 static const uint8_t svcd_scan_offset_placeholder[] = {
51     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
52     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
53 };
54
55 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
56 static uint8_t fcode_tab[MAX_MV * 2 + 1];
57
58 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
59 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
60
61 /* simple include everything table for dc, first byte is bits
62  * number next 3 are code */
63 static uint32_t mpeg1_lum_dc_uni[512];
64 static uint32_t mpeg1_chr_dc_uni[512];
65
66 static uint8_t mpeg1_index_run[2][64];
67 static int8_t  mpeg1_max_level[2][64];
68
69 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
70 {
71     int i;
72
73     for (i = 0; i < 128; i++) {
74         int level = i - 64;
75         int run;
76         if (!level)
77             continue;
78         for (run = 0; run < 64; run++) {
79             int len, code;
80             int alevel = FFABS(level);
81
82             if (alevel > rl->max_level[0][run])
83                 code = 111;                         /* rl->n */
84             else
85                 code = rl->index_run[0][run] + alevel - 1;
86
87             if (code < 111) {                       /* rl->n */
88                 /* length of VLC and sign */
89                 len = rl->table_vlc[code][1] + 1;
90             } else {
91                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
92
93                 if (alevel < 128)
94                     len += 8;
95                 else
96                     len += 16;
97             }
98
99             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
100         }
101     }
102 }
103
104 static int find_frame_rate_index(MpegEncContext *s)
105 {
106     int i;
107     AVRational bestq = (AVRational) {0, 0};
108     AVRational ext;
109     AVRational target = av_inv_q(s->avctx->time_base);
110
111     for (i = 1; i < 14; i++) {
112         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
113             i >= 9)
114             break;
115
116         for (ext.num=1; ext.num <= 4; ext.num++) {
117             for (ext.den=1; ext.den <= 32; ext.den++) {
118                 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
119
120                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
121                     continue;
122                 if (av_gcd(ext.den, ext.num) != 1)
123                     continue;
124
125                 if (    bestq.num==0
126                     || av_nearer_q(target, bestq, q) < 0
127                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
128                     bestq               = q;
129                     s->frame_rate_index = i;
130                     s->mpeg2_frame_rate_ext.num = ext.num;
131                     s->mpeg2_frame_rate_ext.den = ext.den;
132                 }
133             }
134         }
135     }
136
137     if (av_cmp_q(target, bestq))
138         return -1;
139     else
140         return 0;
141 }
142
143 static av_cold int encode_init(AVCodecContext *avctx)
144 {
145     MpegEncContext *s = avctx->priv_data;
146
147     if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
148         avctx->thread_count = 1;
149
150     if (ff_MPV_encode_init(avctx) < 0)
151         return -1;
152
153     if (find_frame_rate_index(s) < 0) {
154         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
155             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
156                    avctx->time_base.den, avctx->time_base.num);
157             return -1;
158         } else {
159             av_log(avctx, AV_LOG_INFO,
160                    "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
161                    avctx->time_base.den, avctx->time_base.num);
162         }
163     }
164
165     if (avctx->profile == FF_PROFILE_UNKNOWN) {
166         if (avctx->level != FF_LEVEL_UNKNOWN) {
167             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
168             return -1;
169         }
170         /* Main or 4:2:2 */
171         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
172     }
173
174     if (avctx->level == FF_LEVEL_UNKNOWN) {
175         if (avctx->profile == 0) {                  /* 4:2:2 */
176             if (avctx->width <= 720 && avctx->height <= 608)
177                 avctx->level = 5;                   /* Main */
178             else
179                 avctx->level = 2;                   /* High */
180         } else {
181             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
182                 av_log(avctx, AV_LOG_ERROR,
183                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
184                 return -1;
185             }
186             if (avctx->width <= 720 && avctx->height <= 576)
187                 avctx->level = 8;                   /* Main */
188             else if (avctx->width <= 1440)
189                 avctx->level = 6;                   /* High 1440 */
190             else
191                 avctx->level = 4;                   /* High */
192         }
193     }
194
195     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
196         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
197         return AVERROR(EINVAL);
198     }
199
200     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
201         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
202             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
203                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
204             return AVERROR(EINVAL);
205         }
206     }
207
208     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
209     if (s->drop_frame_timecode)
210         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
211     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
212         av_log(avctx, AV_LOG_ERROR,
213                "Drop frame time code only allowed with 1001/30000 fps\n");
214         return -1;
215     }
216
217     if (s->tc_opt_str) {
218         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
219         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
220         if (ret < 0)
221             return ret;
222         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
223         s->avctx->timecode_frame_start = s->tc.start;
224     } else {
225         s->avctx->timecode_frame_start = 0; // default is -1
226     }
227     return 0;
228 }
229
230 static void put_header(MpegEncContext *s, int header)
231 {
232     avpriv_align_put_bits(&s->pb);
233     put_bits(&s->pb, 16, header >> 16);
234     put_sbits(&s->pb, 16, header);
235 }
236
237 /* put sequence header if needed */
238 static void mpeg1_encode_sequence_header(MpegEncContext *s)
239 {
240     unsigned int vbv_buffer_size, fps, v;
241     int i, constraint_parameter_flag;
242     uint64_t time_code;
243     float best_aspect_error = 1E10;
244     float aspect_ratio      = av_q2d(s->avctx->sample_aspect_ratio);
245
246     if (aspect_ratio == 0.0)
247         aspect_ratio = 1.0;             // pixel aspect 1.1 (VGA)
248
249     if (s->current_picture.f->key_frame) {
250         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
251
252         /* mpeg1 header repeated every gop */
253         put_header(s, SEQ_START_CODE);
254
255         put_sbits(&s->pb, 12, s->width  & 0xFFF);
256         put_sbits(&s->pb, 12, s->height & 0xFFF);
257
258         for (i = 1; i < 15; i++) {
259             float error = aspect_ratio;
260             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
261                 error -= 1.0 / ff_mpeg1_aspect[i];
262             else
263                 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
264
265             error = FFABS(error);
266
267             if (error < best_aspect_error) {
268                 best_aspect_error    = error;
269                 s->aspect_ratio_info = i;
270             }
271         }
272
273         put_bits(&s->pb, 4, s->aspect_ratio_info);
274         put_bits(&s->pb, 4, s->frame_rate_index);
275
276         if (s->avctx->rc_max_rate) {
277             v = (s->avctx->rc_max_rate + 399) / 400;
278             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
279                 v = 0x3ffff;
280         } else {
281             v = 0x3FFFF;
282         }
283
284         if (s->avctx->rc_buffer_size)
285             vbv_buffer_size = s->avctx->rc_buffer_size;
286         else
287             /* VBV calculation: Scaled so that a VCD has the proper
288              * VBV size of 40 kilobytes */
289             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
290         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
291
292         put_sbits(&s->pb, 18, v);
293         put_bits(&s->pb, 1, 1);         // marker
294         put_sbits(&s->pb, 10, vbv_buffer_size);
295
296         constraint_parameter_flag =
297             s->width  <= 768                                    &&
298             s->height <= 576                                    &&
299             s->mb_width * s->mb_height                 <= 396   &&
300             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
301             framerate.num <= framerate.den * 30                 &&
302             s->avctx->me_range                                  &&
303             s->avctx->me_range < 128                            &&
304             vbv_buffer_size <= 20                               &&
305             v <= 1856000 / 400                                  &&
306             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
307
308         put_bits(&s->pb, 1, constraint_parameter_flag);
309
310         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
311         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
312
313         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
314             put_header(s, EXT_START_CODE);
315             put_bits(&s->pb, 4, 1);                 // seq ext
316
317             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
318
319             put_bits(&s->pb, 3, s->avctx->profile); // profile
320             put_bits(&s->pb, 4, s->avctx->level);   // level
321
322             put_bits(&s->pb, 1, s->progressive_sequence);
323             put_bits(&s->pb, 2, s->chroma_format);
324             put_bits(&s->pb, 2, s->width  >> 12);
325             put_bits(&s->pb, 2, s->height >> 12);
326             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
327             put_bits(&s->pb, 1, 1);                 // marker
328             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
329             put_bits(&s->pb, 1, s->low_delay);
330             put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
331             put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
332         }
333
334         put_header(s, GOP_START_CODE);
335         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
336         /* time code: we must convert from the real frame rate to a
337          * fake MPEG frame rate in case of low frame rate */
338         fps       = (framerate.num + framerate.den / 2) / framerate.den;
339         time_code = s->current_picture_ptr->f->coded_picture_number +
340                     s->avctx->timecode_frame_start;
341
342         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
343
344         av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
345         if (s->drop_frame_timecode)
346             time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
347
348         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
349         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
350         put_bits(&s->pb, 1, 1);
351         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
352         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
353         put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
354         put_bits(&s->pb, 1, 0);                     // broken link
355     }
356 }
357
358 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
359 {
360     while (run >= 33) {
361         put_bits(&s->pb, 11, 0x008);
362         run -= 33;
363     }
364     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
365              ff_mpeg12_mbAddrIncrTable[run][0]);
366 }
367
368 static av_always_inline void put_qscale(MpegEncContext *s)
369 {
370     if (s->q_scale_type) {
371         av_assert2(s->qscale >= 1 && s->qscale <= 12);
372         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
373     } else {
374         put_bits(&s->pb, 5, s->qscale);
375     }
376 }
377
378 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
379 {
380     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
381         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
382         /* slice_vertical_position_extension */
383         put_bits(&s->pb, 3, s->mb_y >> 7);
384     } else {
385         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
386     }
387     put_qscale(s);
388     /* slice extra information */
389     put_bits(&s->pb, 1, 0);
390 }
391
392 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
393 {
394     AVFrameSideData *side_data;
395     mpeg1_encode_sequence_header(s);
396
397     /* mpeg1 picture header */
398     put_header(s, PICTURE_START_CODE);
399     /* temporal reference */
400
401     // RAL: s->picture_number instead of s->fake_picture_number
402     put_bits(&s->pb, 10,
403              (s->picture_number - s->gop_picture_number) & 0x3ff);
404     put_bits(&s->pb, 3, s->pict_type);
405
406     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
407     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
408
409     // RAL: Forward f_code also needed for B-frames
410     if (s->pict_type == AV_PICTURE_TYPE_P ||
411         s->pict_type == AV_PICTURE_TYPE_B) {
412         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
413         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
414             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
415         else
416             put_bits(&s->pb, 3, 7);             /* forward_f_code */
417     }
418
419     // RAL: Backward f_code necessary for B-frames
420     if (s->pict_type == AV_PICTURE_TYPE_B) {
421         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
422         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
423             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
424         else
425             put_bits(&s->pb, 3, 7);             /* backward_f_code */
426     }
427
428     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
429
430     s->frame_pred_frame_dct = 1;
431     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
432         put_header(s, EXT_START_CODE);
433         put_bits(&s->pb, 4, 8);                 /* pic ext */
434         if (s->pict_type == AV_PICTURE_TYPE_P ||
435             s->pict_type == AV_PICTURE_TYPE_B) {
436             put_bits(&s->pb, 4, s->f_code);
437             put_bits(&s->pb, 4, s->f_code);
438         } else {
439             put_bits(&s->pb, 8, 255);
440         }
441         if (s->pict_type == AV_PICTURE_TYPE_B) {
442             put_bits(&s->pb, 4, s->b_code);
443             put_bits(&s->pb, 4, s->b_code);
444         } else {
445             put_bits(&s->pb, 8, 255);
446         }
447         put_bits(&s->pb, 2, s->intra_dc_precision);
448
449         av_assert0(s->picture_structure == PICT_FRAME);
450         put_bits(&s->pb, 2, s->picture_structure);
451         if (s->progressive_sequence)
452             put_bits(&s->pb, 1, 0);             /* no repeat */
453         else
454             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
455         /* XXX: optimize the generation of this flag with entropy measures */
456         s->frame_pred_frame_dct = s->progressive_sequence;
457
458         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
459         put_bits(&s->pb, 1, s->concealment_motion_vectors);
460         put_bits(&s->pb, 1, s->q_scale_type);
461         put_bits(&s->pb, 1, s->intra_vlc_format);
462         put_bits(&s->pb, 1, s->alternate_scan);
463         put_bits(&s->pb, 1, s->repeat_first_field);
464         s->progressive_frame = s->progressive_sequence;
465         /* chroma_420_type */
466         put_bits(&s->pb, 1, s->chroma_format ==
467                             CHROMA_420 ? s->progressive_frame : 0);
468         put_bits(&s->pb, 1, s->progressive_frame);
469         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
470     }
471     if (s->scan_offset) {
472         int i;
473
474         put_header(s, USER_START_CODE);
475         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
476             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
477     }
478     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
479                                        AV_FRAME_DATA_STEREO3D);
480     if (side_data) {
481         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
482         uint8_t fpa_type;
483
484         switch (stereo->type) {
485         case AV_STEREO3D_SIDEBYSIDE:
486             fpa_type = 0x03;
487             break;
488         case AV_STEREO3D_TOPBOTTOM:
489             fpa_type = 0x04;
490             break;
491         case AV_STEREO3D_2D:
492             fpa_type = 0x08;
493             break;
494         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
495             fpa_type = 0x23;
496             break;
497         default:
498             fpa_type = 0;
499             break;
500         }
501
502         if (fpa_type != 0) {
503             put_header(s, USER_START_CODE);
504             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
505             put_bits(&s->pb, 8, 'P');
506             put_bits(&s->pb, 8, '3');
507             put_bits(&s->pb, 8, 'D');
508             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
509
510             put_bits(&s->pb, 1, 1);     // reserved_bit
511             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
512             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
513             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
514         }
515     }
516
517     s->mb_y = 0;
518     ff_mpeg1_encode_slice_header(s);
519 }
520
521 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
522                                 int has_mv, int field_motion)
523 {
524     put_bits(&s->pb, n, bits);
525     if (!s->frame_pred_frame_dct) {
526         if (has_mv)
527             /* motion_type: frame/field */
528             put_bits(&s->pb, 2, 2 - field_motion);
529         put_bits(&s->pb, 1, s->interlaced_dct);
530     }
531 }
532
533 // RAL: Parameter added: f_or_b_code
534 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
535 {
536     if (val == 0) {
537         /* zero vector */
538         put_bits(&s->pb,
539                  ff_mpeg12_mbMotionVectorTable[0][1],
540                  ff_mpeg12_mbMotionVectorTable[0][0]);
541     } else {
542         int code, sign, bits;
543         int bit_size = f_or_b_code - 1;
544         int range    = 1 << bit_size;
545         /* modulo encoding */
546         val = sign_extend(val, 5 + bit_size);
547
548         if (val >= 0) {
549             val--;
550             code = (val >> bit_size) + 1;
551             bits = val & (range - 1);
552             sign = 0;
553         } else {
554             val = -val;
555             val--;
556             code = (val >> bit_size) + 1;
557             bits = val & (range - 1);
558             sign = 1;
559         }
560
561         av_assert2(code > 0 && code <= 16);
562
563         put_bits(&s->pb,
564                  ff_mpeg12_mbMotionVectorTable[code][1],
565                  ff_mpeg12_mbMotionVectorTable[code][0]);
566
567         put_bits(&s->pb, 1, sign);
568         if (bit_size > 0)
569             put_bits(&s->pb, bit_size, bits);
570     }
571 }
572
573 static inline void encode_dc(MpegEncContext *s, int diff, int component)
574 {
575     if (((unsigned) (diff + 255)) >= 511) {
576         int index;
577
578         if (diff < 0) {
579             index = av_log2_16bit(-2 * diff);
580             diff--;
581         } else {
582             index = av_log2_16bit(2 * diff);
583         }
584         if (component == 0)
585             put_bits(&s->pb,
586                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
587                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
588                      (diff & ((1 << index) - 1)));
589         else
590             put_bits(&s->pb,
591                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
592                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
593                      (diff & ((1 << index) - 1)));
594     } else {
595         if (component == 0)
596             put_bits(&s->pb,
597                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
598                      mpeg1_lum_dc_uni[diff + 255] >> 8);
599         else
600             put_bits(&s->pb,
601                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
602                      mpeg1_chr_dc_uni[diff + 255] >> 8);
603     }
604 }
605
606 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
607 {
608     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
609     int code, component;
610     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
611
612     last_index = s->block_last_index[n];
613
614     /* DC coef */
615     if (s->mb_intra) {
616         component = (n <= 3 ? 0 : (n & 1) + 1);
617         dc        = block[0];                   /* overflow is impossible */
618         diff      = dc - s->last_dc[component];
619         encode_dc(s, diff, component);
620         s->last_dc[component] = dc;
621         i = 1;
622         if (s->intra_vlc_format)
623             table_vlc = ff_rl_mpeg2.table_vlc;
624     } else {
625         /* encode the first coefficient: needs to be done here because
626          * it is handled slightly differently */
627         level = block[0];
628         if (abs(level) == 1) {
629             code = ((uint32_t)level >> 31);     /* the sign bit */
630             put_bits(&s->pb, 2, code | 0x02);
631             i = 1;
632         } else {
633             i             = 0;
634             last_non_zero = -1;
635             goto next_coef;
636         }
637     }
638
639     /* now quantify & encode AC coefs */
640     last_non_zero = i - 1;
641
642     for (; i <= last_index; i++) {
643         j     = s->intra_scantable.permutated[i];
644         level = block[j];
645
646 next_coef:
647         /* encode using VLC */
648         if (level != 0) {
649             run = i - last_non_zero - 1;
650
651             alevel = level;
652             MASK_ABS(sign, alevel);
653             sign &= 1;
654
655             if (alevel <= mpeg1_max_level[0][run]) {
656                 code = mpeg1_index_run[0][run] + alevel - 1;
657                 /* store the VLC & sign at once */
658                 put_bits(&s->pb, table_vlc[code][1] + 1,
659                          (table_vlc[code][0] << 1) + sign);
660             } else {
661                 /* escape seems to be pretty rare <5% so I do not optimize it */
662                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
663                 /* escape: only clip in this case */
664                 put_bits(&s->pb, 6, run);
665                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
666                     if (alevel < 128) {
667                         put_sbits(&s->pb, 8, level);
668                     } else {
669                         if (level < 0)
670                             put_bits(&s->pb, 16, 0x8001 + level + 255);
671                         else
672                             put_sbits(&s->pb, 16, level);
673                     }
674                 } else {
675                     put_sbits(&s->pb, 12, level);
676                 }
677             }
678             last_non_zero = i;
679         }
680     }
681     /* end of block */
682     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
683 }
684
685 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
686                                                       int16_t block[6][64],
687                                                       int motion_x, int motion_y,
688                                                       int mb_block_count)
689 {
690     int i, cbp;
691     const int mb_x     = s->mb_x;
692     const int mb_y     = s->mb_y;
693     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
694
695     /* compute cbp */
696     cbp = 0;
697     for (i = 0; i < mb_block_count; i++)
698         if (s->block_last_index[i] >= 0)
699             cbp |= 1 << (mb_block_count - 1 - i);
700
701     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
702         (mb_x != s->mb_width - 1 ||
703          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
704         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
705          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
706           (((s->mv_dir & MV_DIR_FORWARD)
707             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
708                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
709            ((s->mv_dir & MV_DIR_BACKWARD)
710             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
711                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
712         s->mb_skip_run++;
713         s->qscale -= s->dquant;
714         s->skip_count++;
715         s->misc_bits++;
716         s->last_bits++;
717         if (s->pict_type == AV_PICTURE_TYPE_P) {
718             s->last_mv[0][0][0] =
719             s->last_mv[0][0][1] =
720             s->last_mv[0][1][0] =
721             s->last_mv[0][1][1] = 0;
722         }
723     } else {
724         if (first_mb) {
725             av_assert0(s->mb_skip_run == 0);
726             encode_mb_skip_run(s, s->mb_x);
727         } else {
728             encode_mb_skip_run(s, s->mb_skip_run);
729         }
730
731         if (s->pict_type == AV_PICTURE_TYPE_I) {
732             if (s->dquant && cbp) {
733                 /* macroblock_type: macroblock_quant = 1 */
734                 put_mb_modes(s, 2, 1, 0, 0);
735                 put_qscale(s);
736             } else {
737                 /* macroblock_type: macroblock_quant = 0 */
738                 put_mb_modes(s, 1, 1, 0, 0);
739                 s->qscale -= s->dquant;
740             }
741             s->misc_bits += get_bits_diff(s);
742             s->i_count++;
743         } else if (s->mb_intra) {
744             if (s->dquant && cbp) {
745                 put_mb_modes(s, 6, 0x01, 0, 0);
746                 put_qscale(s);
747             } else {
748                 put_mb_modes(s, 5, 0x03, 0, 0);
749                 s->qscale -= s->dquant;
750             }
751             s->misc_bits += get_bits_diff(s);
752             s->i_count++;
753             memset(s->last_mv, 0, sizeof(s->last_mv));
754         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
755             if (s->mv_type == MV_TYPE_16X16) {
756                 if (cbp != 0) {
757                     if ((motion_x | motion_y) == 0) {
758                         if (s->dquant) {
759                             /* macroblock_pattern & quant */
760                             put_mb_modes(s, 5, 1, 0, 0);
761                             put_qscale(s);
762                         } else {
763                             /* macroblock_pattern only */
764                             put_mb_modes(s, 2, 1, 0, 0);
765                         }
766                         s->misc_bits += get_bits_diff(s);
767                     } else {
768                         if (s->dquant) {
769                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
770                             put_qscale(s);
771                         } else {
772                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
773                         }
774                         s->misc_bits += get_bits_diff(s);
775                         // RAL: f_code parameter added
776                         mpeg1_encode_motion(s,
777                                             motion_x - s->last_mv[0][0][0],
778                                             s->f_code);
779                         // RAL: f_code parameter added
780                         mpeg1_encode_motion(s,
781                                             motion_y - s->last_mv[0][0][1],
782                                             s->f_code);
783                         s->mv_bits += get_bits_diff(s);
784                     }
785                 } else {
786                     put_bits(&s->pb, 3, 1);         /* motion only */
787                     if (!s->frame_pred_frame_dct)
788                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
789                     s->misc_bits += get_bits_diff(s);
790                     // RAL: f_code parameter added
791                     mpeg1_encode_motion(s,
792                                         motion_x - s->last_mv[0][0][0],
793                                         s->f_code);
794                     // RAL: f_code parameter added
795                     mpeg1_encode_motion(s,
796                                         motion_y - s->last_mv[0][0][1],
797                                         s->f_code);
798                     s->qscale  -= s->dquant;
799                     s->mv_bits += get_bits_diff(s);
800                 }
801                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
802                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
803             } else {
804                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
805
806                 if (cbp) {
807                     if (s->dquant) {
808                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
809                         put_qscale(s);
810                     } else {
811                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
812                     }
813                 } else {
814                     put_bits(&s->pb, 3, 1);             /* motion only */
815                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
816                     s->qscale -= s->dquant;
817                 }
818                 s->misc_bits += get_bits_diff(s);
819                 for (i = 0; i < 2; i++) {
820                     put_bits(&s->pb, 1, s->field_select[0][i]);
821                     mpeg1_encode_motion(s,
822                                         s->mv[0][i][0] - s->last_mv[0][i][0],
823                                         s->f_code);
824                     mpeg1_encode_motion(s,
825                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
826                                         s->f_code);
827                     s->last_mv[0][i][0] = s->mv[0][i][0];
828                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
829                 }
830                 s->mv_bits += get_bits_diff(s);
831             }
832             if (cbp) {
833                 if (s->chroma_y_shift) {
834                     put_bits(&s->pb,
835                              ff_mpeg12_mbPatTable[cbp][1],
836                              ff_mpeg12_mbPatTable[cbp][0]);
837                 } else {
838                     put_bits(&s->pb,
839                              ff_mpeg12_mbPatTable[cbp >> 2][1],
840                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
841                     put_sbits(&s->pb, 2, cbp);
842                 }
843             }
844             s->f_count++;
845         } else {
846             if (s->mv_type == MV_TYPE_16X16) {
847                 if (cbp) {                      // With coded bloc pattern
848                     if (s->dquant) {
849                         if (s->mv_dir == MV_DIR_FORWARD)
850                             put_mb_modes(s, 6, 3, 1, 0);
851                         else
852                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
853                         put_qscale(s);
854                     } else {
855                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
856                     }
857                 } else {                        // No coded bloc pattern
858                     put_bits(&s->pb, 5 - s->mv_dir, 2);
859                     if (!s->frame_pred_frame_dct)
860                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
861                     s->qscale -= s->dquant;
862                 }
863                 s->misc_bits += get_bits_diff(s);
864                 if (s->mv_dir & MV_DIR_FORWARD) {
865                     mpeg1_encode_motion(s,
866                                         s->mv[0][0][0] - s->last_mv[0][0][0],
867                                         s->f_code);
868                     mpeg1_encode_motion(s,
869                                         s->mv[0][0][1] - s->last_mv[0][0][1],
870                                         s->f_code);
871                     s->last_mv[0][0][0] =
872                     s->last_mv[0][1][0] = s->mv[0][0][0];
873                     s->last_mv[0][0][1] =
874                     s->last_mv[0][1][1] = s->mv[0][0][1];
875                     s->f_count++;
876                 }
877                 if (s->mv_dir & MV_DIR_BACKWARD) {
878                     mpeg1_encode_motion(s,
879                                         s->mv[1][0][0] - s->last_mv[1][0][0],
880                                         s->b_code);
881                     mpeg1_encode_motion(s,
882                                         s->mv[1][0][1] - s->last_mv[1][0][1],
883                                         s->b_code);
884                     s->last_mv[1][0][0] =
885                     s->last_mv[1][1][0] = s->mv[1][0][0];
886                     s->last_mv[1][0][1] =
887                     s->last_mv[1][1][1] = s->mv[1][0][1];
888                     s->b_count++;
889                 }
890             } else {
891                 av_assert2(s->mv_type == MV_TYPE_FIELD);
892                 av_assert2(!s->frame_pred_frame_dct);
893                 if (cbp) {                      // With coded bloc pattern
894                     if (s->dquant) {
895                         if (s->mv_dir == MV_DIR_FORWARD)
896                             put_mb_modes(s, 6, 3, 1, 1);
897                         else
898                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
899                         put_qscale(s);
900                     } else {
901                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
902                     }
903                 } else {                        // No coded bloc pattern
904                     put_bits(&s->pb, 5 - s->mv_dir, 2);
905                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
906                     s->qscale -= s->dquant;
907                 }
908                 s->misc_bits += get_bits_diff(s);
909                 if (s->mv_dir & MV_DIR_FORWARD) {
910                     for (i = 0; i < 2; i++) {
911                         put_bits(&s->pb, 1, s->field_select[0][i]);
912                         mpeg1_encode_motion(s,
913                                             s->mv[0][i][0] - s->last_mv[0][i][0],
914                                             s->f_code);
915                         mpeg1_encode_motion(s,
916                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
917                                             s->f_code);
918                         s->last_mv[0][i][0] = s->mv[0][i][0];
919                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
920                     }
921                     s->f_count++;
922                 }
923                 if (s->mv_dir & MV_DIR_BACKWARD) {
924                     for (i = 0; i < 2; i++) {
925                         put_bits(&s->pb, 1, s->field_select[1][i]);
926                         mpeg1_encode_motion(s,
927                                             s->mv[1][i][0] - s->last_mv[1][i][0],
928                                             s->b_code);
929                         mpeg1_encode_motion(s,
930                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
931                                             s->b_code);
932                         s->last_mv[1][i][0] = s->mv[1][i][0];
933                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
934                     }
935                     s->b_count++;
936                 }
937             }
938             s->mv_bits += get_bits_diff(s);
939             if (cbp) {
940                 if (s->chroma_y_shift) {
941                     put_bits(&s->pb,
942                              ff_mpeg12_mbPatTable[cbp][1],
943                              ff_mpeg12_mbPatTable[cbp][0]);
944                 } else {
945                     put_bits(&s->pb,
946                              ff_mpeg12_mbPatTable[cbp >> 2][1],
947                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
948                     put_sbits(&s->pb, 2, cbp);
949                 }
950             }
951         }
952         for (i = 0; i < mb_block_count; i++)
953             if (cbp & (1 << (mb_block_count - 1 - i)))
954                 mpeg1_encode_block(s, block[i], i);
955         s->mb_skip_run = 0;
956         if (s->mb_intra)
957             s->i_tex_bits += get_bits_diff(s);
958         else
959             s->p_tex_bits += get_bits_diff(s);
960     }
961 }
962
963 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
964                         int motion_x, int motion_y)
965 {
966     if (s->chroma_format == CHROMA_420)
967         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
968     else
969         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
970 }
971
972 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
973 {
974     static int done = 0;
975
976     ff_mpeg12_common_init(s);
977
978     if (!done) {
979         int f_code;
980         int mv;
981         int i;
982
983         done = 1;
984         ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
985         ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
986
987         for (i = 0; i < 64; i++) {
988             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
989             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
990         }
991
992         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
993         if (s->intra_vlc_format)
994             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
995
996         /* build unified dc encoding tables */
997         for (i = -255; i < 256; i++) {
998             int adiff, index;
999             int bits, code;
1000             int diff = i;
1001
1002             adiff = FFABS(diff);
1003             if (diff < 0)
1004                 diff--;
1005             index = av_log2(2 * adiff);
1006
1007             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1008             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1009                    (diff & ((1 << index) - 1));
1010             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1011
1012             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1013             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1014                    (diff & ((1 << index) - 1));
1015             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1016         }
1017
1018         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1019             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1020                 int len;
1021
1022                 if (mv == 0) {
1023                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1024                 } else {
1025                     int val, bit_size, code;
1026
1027                     bit_size = f_code - 1;
1028
1029                     val = mv;
1030                     if (val < 0)
1031                         val = -val;
1032                     val--;
1033                     code = (val >> bit_size) + 1;
1034                     if (code < 17)
1035                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1036                               1 + bit_size;
1037                     else
1038                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1039                               2 + bit_size;
1040                 }
1041
1042                 mv_penalty[f_code][mv + MAX_MV] = len;
1043             }
1044
1045
1046         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1047             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1048                 fcode_tab[mv + MAX_MV] = f_code;
1049     }
1050     s->me.mv_penalty = mv_penalty;
1051     s->fcode_tab     = fcode_tab;
1052     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1053         s->min_qcoeff = -255;
1054         s->max_qcoeff = 255;
1055     } else {
1056         s->min_qcoeff = -2047;
1057         s->max_qcoeff = 2047;
1058     }
1059     if (s->intra_vlc_format) {
1060         s->intra_ac_vlc_length      =
1061         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1062     } else {
1063         s->intra_ac_vlc_length      =
1064         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1065     }
1066     s->inter_ac_vlc_length      =
1067     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1068 }
1069
1070 #define OFFSET(x) offsetof(MpegEncContext, x)
1071 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1072 #define COMMON_OPTS                                                           \
1073     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format",   \
1074       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1075     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1076       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1077     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1078       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1079     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1080       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1081
1082 static const AVOption mpeg1_options[] = {
1083     COMMON_OPTS
1084     FF_MPV_COMMON_OPTS
1085     { NULL },
1086 };
1087
1088 static const AVOption mpeg2_options[] = {
1089     COMMON_OPTS
1090     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1091     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1092     FF_MPV_COMMON_OPTS
1093     { NULL },
1094 };
1095
1096 #define mpeg12_class(x)                                 \
1097 static const AVClass mpeg ## x ## _class = {            \
1098     .class_name = "mpeg" # x "video encoder",           \
1099     .item_name  = av_default_item_name,                 \
1100     .option     = mpeg ## x ## _options,                \
1101     .version    = LIBAVUTIL_VERSION_INT,                \
1102 };
1103
1104 mpeg12_class(1)
1105 mpeg12_class(2)
1106
1107 AVCodec ff_mpeg1video_encoder = {
1108     .name                 = "mpeg1video",
1109     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1110     .type                 = AVMEDIA_TYPE_VIDEO,
1111     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1112     .priv_data_size       = sizeof(MpegEncContext),
1113     .init                 = encode_init,
1114     .encode2              = ff_MPV_encode_picture,
1115     .close                = ff_MPV_encode_end,
1116     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1117     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1118                                                            AV_PIX_FMT_NONE },
1119     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1120     .priv_class           = &mpeg1_class,
1121 };
1122
1123 AVCodec ff_mpeg2video_encoder = {
1124     .name                 = "mpeg2video",
1125     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1126     .type                 = AVMEDIA_TYPE_VIDEO,
1127     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1128     .priv_data_size       = sizeof(MpegEncContext),
1129     .init                 = encode_init,
1130     .encode2              = ff_MPV_encode_picture,
1131     .close                = ff_MPV_encode_end,
1132     .supported_framerates = ff_mpeg2_frame_rate_tab,
1133     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1134                                                            AV_PIX_FMT_YUV422P,
1135                                                            AV_PIX_FMT_NONE },
1136     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1137     .priv_class           = &mpeg2_class,
1138 };