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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / mpeg12enc.c
CommitLineData
2ba45a60
DM		 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
46static const uint8_t inv_non_linear_qscale[] = {
47 0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
48};
49
50static 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
55static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
56static uint8_t fcode_tab[MAX_MV * 2 + 1];
57
58static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
59static 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 */
63static uint32_t mpeg1_lum_dc_uni[512];
64static uint32_t mpeg1_chr_dc_uni[512];
65
66static uint8_t mpeg1_index_run[2][64];
67static int8_t mpeg1_max_level[2][64];
68
69static 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
104static 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
143static 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 multiples 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
230static 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 */
238static 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 int64_t best_aspect_error = INT64_MAX;
244 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
245
246 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
247 aspect_ratio = (AVRational){1,1}; // 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 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
260 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
261 error -= (1LL<<32) / ff_mpeg1_aspect[i];
262 else
263 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
264
265 error = FFABS(error);
266
267 if (error - 2 <= 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 AVFrameSideData *side_data;
315 int width = s->width;
316 int height = s->height;
317 int use_seq_disp_ext;
318
319 put_header(s, EXT_START_CODE);
320 put_bits(&s->pb, 4, 1); // seq ext
321
322 put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
323
324 put_bits(&s->pb, 3, s->avctx->profile); // profile
325 put_bits(&s->pb, 4, s->avctx->level); // level
326
327 put_bits(&s->pb, 1, s->progressive_sequence);
328 put_bits(&s->pb, 2, s->chroma_format);
329 put_bits(&s->pb, 2, s->width >> 12);
330 put_bits(&s->pb, 2, s->height >> 12);
331 put_bits(&s->pb, 12, v >> 18); // bitrate ext
332 put_bits(&s->pb, 1, 1); // marker
333 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
334 put_bits(&s->pb, 1, s->low_delay);
335 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
336 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
337
338 side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
339 if (side_data) {
340 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
341 if (pan_scan->width && pan_scan->height) {
342 width = pan_scan->width >> 4;
343 height = pan_scan->height >> 4;
344 }
345 }
346
347 use_seq_disp_ext = (width != s->width ||
348 height != s->height ||
349 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
350 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
351 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED);
352
353 if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
354 put_header(s, EXT_START_CODE);
355 put_bits(&s->pb, 4, 2); // sequence display extension
356 put_bits(&s->pb, 3, 0); // video_format: 0 is components
357 put_bits(&s->pb, 1, 1); // colour_description
358 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
359 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
360 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
361 put_bits(&s->pb, 14, width); // display_horizontal_size
362 put_bits(&s->pb, 1, 1); // marker_bit
363 put_bits(&s->pb, 14, height); // display_vertical_size
364 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
365 }
366 }
367
368 put_header(s, GOP_START_CODE);
369 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
370 /* time code: we must convert from the real frame rate to a
371 * fake MPEG frame rate in case of low frame rate */
372 fps = (framerate.num + framerate.den / 2) / framerate.den;
373 time_code = s->current_picture_ptr->f->coded_picture_number +
374 s->avctx->timecode_frame_start;
375
376 s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
377
378 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
379 if (s->drop_frame_timecode)
380 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
381
382 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
383 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
384 put_bits(&s->pb, 1, 1);
385 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
386 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
387 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
388 put_bits(&s->pb, 1, 0); // broken link
389 }
390}
391
392static inline void encode_mb_skip_run(MpegEncContext *s, int run)
393{
394 while (run >= 33) {
395 put_bits(&s->pb, 11, 0x008);
396 run -= 33;
397 }
398 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
399 ff_mpeg12_mbAddrIncrTable[run][0]);
400}
401
402static av_always_inline void put_qscale(MpegEncContext *s)
403{
404 if (s->q_scale_type) {
405 av_assert2(s->qscale >= 1 && s->qscale <= 12);
406 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
407 } else {
408 put_bits(&s->pb, 5, s->qscale);
409 }
410}
411
412void ff_mpeg1_encode_slice_header(MpegEncContext *s)
413{
414 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
415 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
416 /* slice_vertical_position_extension */
417 put_bits(&s->pb, 3, s->mb_y >> 7);
418 } else {
419 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
420 }
421 put_qscale(s);
422 /* slice extra information */
423 put_bits(&s->pb, 1, 0);
424}
425
426void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
427{
428 AVFrameSideData *side_data;
429 mpeg1_encode_sequence_header(s);
430
431 /* mpeg1 picture header */
432 put_header(s, PICTURE_START_CODE);
433 /* temporal reference */
434
435 // RAL: s->picture_number instead of s->fake_picture_number
436 put_bits(&s->pb, 10,
437 (s->picture_number - s->gop_picture_number) & 0x3ff);
438 put_bits(&s->pb, 3, s->pict_type);
439
440 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
441 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
442
443 // RAL: Forward f_code also needed for B-frames
444 if (s->pict_type == AV_PICTURE_TYPE_P ||
445 s->pict_type == AV_PICTURE_TYPE_B) {
446 put_bits(&s->pb, 1, 0); /* half pel coordinates */
447 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
448 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
449 else
450 put_bits(&s->pb, 3, 7); /* forward_f_code */
451 }
452
453 // RAL: Backward f_code necessary for B-frames
454 if (s->pict_type == AV_PICTURE_TYPE_B) {
455 put_bits(&s->pb, 1, 0); /* half pel coordinates */
456 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
457 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
458 else
459 put_bits(&s->pb, 3, 7); /* backward_f_code */
460 }
461
462 put_bits(&s->pb, 1, 0); /* extra bit picture */
463
464 s->frame_pred_frame_dct = 1;
465 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
466 put_header(s, EXT_START_CODE);
467 put_bits(&s->pb, 4, 8); /* pic ext */
468 if (s->pict_type == AV_PICTURE_TYPE_P ||
469 s->pict_type == AV_PICTURE_TYPE_B) {
470 put_bits(&s->pb, 4, s->f_code);
471 put_bits(&s->pb, 4, s->f_code);
472 } else {
473 put_bits(&s->pb, 8, 255);
474 }
475 if (s->pict_type == AV_PICTURE_TYPE_B) {
476 put_bits(&s->pb, 4, s->b_code);
477 put_bits(&s->pb, 4, s->b_code);
478 } else {
479 put_bits(&s->pb, 8, 255);
480 }
481 put_bits(&s->pb, 2, s->intra_dc_precision);
482
483 av_assert0(s->picture_structure == PICT_FRAME);
484 put_bits(&s->pb, 2, s->picture_structure);
485 if (s->progressive_sequence)
486 put_bits(&s->pb, 1, 0); /* no repeat */
487 else
488 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
489 /* XXX: optimize the generation of this flag with entropy measures */
490 s->frame_pred_frame_dct = s->progressive_sequence;
491
492 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
493 put_bits(&s->pb, 1, s->concealment_motion_vectors);
494 put_bits(&s->pb, 1, s->q_scale_type);
495 put_bits(&s->pb, 1, s->intra_vlc_format);
496 put_bits(&s->pb, 1, s->alternate_scan);
497 put_bits(&s->pb, 1, s->repeat_first_field);
498 s->progressive_frame = s->progressive_sequence;
499 /* chroma_420_type */
500 put_bits(&s->pb, 1, s->chroma_format ==
501 CHROMA_420 ? s->progressive_frame : 0);
502 put_bits(&s->pb, 1, s->progressive_frame);
503 put_bits(&s->pb, 1, 0); /* composite_display_flag */
504 }
505 if (s->scan_offset) {
506 int i;
507
508 put_header(s, USER_START_CODE);
509 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
510 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
511 }
512 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
513 AV_FRAME_DATA_STEREO3D);
514 if (side_data) {
515 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
516 uint8_t fpa_type;
517
518 switch (stereo->type) {
519 case AV_STEREO3D_SIDEBYSIDE:
520 fpa_type = 0x03;
521 break;
522 case AV_STEREO3D_TOPBOTTOM:
523 fpa_type = 0x04;
524 break;
525 case AV_STEREO3D_2D:
526 fpa_type = 0x08;
527 break;
528 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
529 fpa_type = 0x23;
530 break;
531 default:
532 fpa_type = 0;
533 break;
534 }
535
536 if (fpa_type != 0) {
537 put_header(s, USER_START_CODE);
538 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
539 put_bits(&s->pb, 8, 'P');
540 put_bits(&s->pb, 8, '3');
541 put_bits(&s->pb, 8, 'D');
542 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
543
544 put_bits(&s->pb, 1, 1); // reserved_bit
545 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
546 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
547 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
548 }
549 }
550
551 s->mb_y = 0;
552 ff_mpeg1_encode_slice_header(s);
553}
554
555static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
556 int has_mv, int field_motion)
557{
558 put_bits(&s->pb, n, bits);
559 if (!s->frame_pred_frame_dct) {
560 if (has_mv)
561 /* motion_type: frame/field */
562 put_bits(&s->pb, 2, 2 - field_motion);
563 put_bits(&s->pb, 1, s->interlaced_dct);
564 }
565}
566
567// RAL: Parameter added: f_or_b_code
568static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
569{
570 if (val == 0) {
571 /* zero vector */
572 put_bits(&s->pb,
573 ff_mpeg12_mbMotionVectorTable[0][1],
574 ff_mpeg12_mbMotionVectorTable[0][0]);
575 } else {
576 int code, sign, bits;
577 int bit_size = f_or_b_code - 1;
578 int range = 1 << bit_size;
579 /* modulo encoding */
580 val = sign_extend(val, 5 + bit_size);
581
582 if (val >= 0) {
583 val--;
584 code = (val >> bit_size) + 1;
585 bits = val & (range - 1);
586 sign = 0;
587 } else {
588 val = -val;
589 val--;
590 code = (val >> bit_size) + 1;
591 bits = val & (range - 1);
592 sign = 1;
593 }
594
595 av_assert2(code > 0 && code <= 16);
596
597 put_bits(&s->pb,
598 ff_mpeg12_mbMotionVectorTable[code][1],
599 ff_mpeg12_mbMotionVectorTable[code][0]);
600
601 put_bits(&s->pb, 1, sign);
602 if (bit_size > 0)
603 put_bits(&s->pb, bit_size, bits);
604 }
605}
606
607static inline void encode_dc(MpegEncContext *s, int diff, int component)
608{
609 if (((unsigned) (diff + 255)) >= 511) {
610 int index;
611
612 if (diff < 0) {
613 index = av_log2_16bit(-2 * diff);
614 diff--;
615 } else {
616 index = av_log2_16bit(2 * diff);
617 }
618 if (component == 0)
619 put_bits(&s->pb,
620 ff_mpeg12_vlc_dc_lum_bits[index] + index,
621 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
622 (diff & ((1 << index) - 1)));
623 else
624 put_bits(&s->pb,
625 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
626 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
627 (diff & ((1 << index) - 1)));
628 } else {
629 if (component == 0)
630 put_bits(&s->pb,
631 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
632 mpeg1_lum_dc_uni[diff + 255] >> 8);
633 else
634 put_bits(&s->pb,
635 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
636 mpeg1_chr_dc_uni[diff + 255] >> 8);
637 }
638}
639
640static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
641{
642 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
643 int code, component;
644 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
645
646 last_index = s->block_last_index[n];
647
648 /* DC coef */
649 if (s->mb_intra) {
650 component = (n <= 3 ? 0 : (n & 1) + 1);
651 dc = block[0]; /* overflow is impossible */
652 diff = dc - s->last_dc[component];
653 encode_dc(s, diff, component);
654 s->last_dc[component] = dc;
655 i = 1;
656 if (s->intra_vlc_format)
657 table_vlc = ff_rl_mpeg2.table_vlc;
658 } else {
659 /* encode the first coefficient: needs to be done here because
660 * it is handled slightly differently */
661 level = block[0];
662 if (abs(level) == 1) {
663 code = ((uint32_t)level >> 31); /* the sign bit */
664 put_bits(&s->pb, 2, code | 0x02);
665 i = 1;
666 } else {
667 i = 0;
668 last_non_zero = -1;
669 goto next_coef;
670 }
671 }
672
673 /* now quantify & encode AC coefs */
674 last_non_zero = i - 1;
675
676 for (; i <= last_index; i++) {
677 j = s->intra_scantable.permutated[i];
678 level = block[j];
679
680next_coef:
681 /* encode using VLC */
682 if (level != 0) {
683 run = i - last_non_zero - 1;
684
685 alevel = level;
686 MASK_ABS(sign, alevel);
687 sign &= 1;
688
689 if (alevel <= mpeg1_max_level[0][run]) {
690 code = mpeg1_index_run[0][run] + alevel - 1;
691 /* store the VLC & sign at once */
692 put_bits(&s->pb, table_vlc[code][1] + 1,
693 (table_vlc[code][0] << 1) + sign);
694 } else {
695 /* escape seems to be pretty rare <5% so I do not optimize it */
696 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
697 /* escape: only clip in this case */
698 put_bits(&s->pb, 6, run);
699 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
700 if (alevel < 128) {
701 put_sbits(&s->pb, 8, level);
702 } else {
703 if (level < 0)
704 put_bits(&s->pb, 16, 0x8001 + level + 255);
705 else
706 put_sbits(&s->pb, 16, level);
707 }
708 } else {
709 put_sbits(&s->pb, 12, level);
710 }
711 }
712 last_non_zero = i;
713 }
714 }
715 /* end of block */
716 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
717}
718
719static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
720 int16_t block[8][64],
721 int motion_x, int motion_y,
722 int mb_block_count)
723{
724 int i, cbp;
725 const int mb_x = s->mb_x;
726 const int mb_y = s->mb_y;
727 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
728
729 /* compute cbp */
730 cbp = 0;
731 for (i = 0; i < mb_block_count; i++)
732 if (s->block_last_index[i] >= 0)
733 cbp |= 1 << (mb_block_count - 1 - i);
734
735 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
736 (mb_x != s->mb_width - 1 ||
737 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
738 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
739 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
740 (((s->mv_dir & MV_DIR_FORWARD)
741 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
742 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
743 ((s->mv_dir & MV_DIR_BACKWARD)
744 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
745 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
746 s->mb_skip_run++;
747 s->qscale -= s->dquant;
748 s->skip_count++;
749 s->misc_bits++;
750 s->last_bits++;
751 if (s->pict_type == AV_PICTURE_TYPE_P) {
752 s->last_mv[0][0][0] =
753 s->last_mv[0][0][1] =
754 s->last_mv[0][1][0] =
755 s->last_mv[0][1][1] = 0;
756 }
757 } else {
758 if (first_mb) {
759 av_assert0(s->mb_skip_run == 0);
760 encode_mb_skip_run(s, s->mb_x);
761 } else {
762 encode_mb_skip_run(s, s->mb_skip_run);
763 }
764
765 if (s->pict_type == AV_PICTURE_TYPE_I) {
766 if (s->dquant && cbp) {
767 /* macroblock_type: macroblock_quant = 1 */
768 put_mb_modes(s, 2, 1, 0, 0);
769 put_qscale(s);
770 } else {
771 /* macroblock_type: macroblock_quant = 0 */
772 put_mb_modes(s, 1, 1, 0, 0);
773 s->qscale -= s->dquant;
774 }
775 s->misc_bits += get_bits_diff(s);
776 s->i_count++;
777 } else if (s->mb_intra) {
778 if (s->dquant && cbp) {
779 put_mb_modes(s, 6, 0x01, 0, 0);
780 put_qscale(s);
781 } else {
782 put_mb_modes(s, 5, 0x03, 0, 0);
783 s->qscale -= s->dquant;
784 }
785 s->misc_bits += get_bits_diff(s);
786 s->i_count++;
787 memset(s->last_mv, 0, sizeof(s->last_mv));
788 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
789 if (s->mv_type == MV_TYPE_16X16) {
790 if (cbp != 0) {
791 if ((motion_x | motion_y) == 0) {
792 if (s->dquant) {
793 /* macroblock_pattern & quant */
794 put_mb_modes(s, 5, 1, 0, 0);
795 put_qscale(s);
796 } else {
797 /* macroblock_pattern only */
798 put_mb_modes(s, 2, 1, 0, 0);
799 }
800 s->misc_bits += get_bits_diff(s);
801 } else {
802 if (s->dquant) {
803 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
804 put_qscale(s);
805 } else {
806 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
807 }
808 s->misc_bits += get_bits_diff(s);
809 // RAL: f_code parameter added
810 mpeg1_encode_motion(s,
811 motion_x - s->last_mv[0][0][0],
812 s->f_code);
813 // RAL: f_code parameter added
814 mpeg1_encode_motion(s,
815 motion_y - s->last_mv[0][0][1],
816 s->f_code);
817 s->mv_bits += get_bits_diff(s);
818 }
819 } else {
820 put_bits(&s->pb, 3, 1); /* motion only */
821 if (!s->frame_pred_frame_dct)
822 put_bits(&s->pb, 2, 2); /* motion_type: frame */
823 s->misc_bits += get_bits_diff(s);
824 // RAL: f_code parameter added
825 mpeg1_encode_motion(s,
826 motion_x - s->last_mv[0][0][0],
827 s->f_code);
828 // RAL: f_code parameter added
829 mpeg1_encode_motion(s,
830 motion_y - s->last_mv[0][0][1],
831 s->f_code);
832 s->qscale -= s->dquant;
833 s->mv_bits += get_bits_diff(s);
834 }
835 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
836 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
837 } else {
838 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
839
840 if (cbp) {
841 if (s->dquant) {
842 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
843 put_qscale(s);
844 } else {
845 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
846 }
847 } else {
848 put_bits(&s->pb, 3, 1); /* motion only */
849 put_bits(&s->pb, 2, 1); /* motion_type: field */
850 s->qscale -= s->dquant;
851 }
852 s->misc_bits += get_bits_diff(s);
853 for (i = 0; i < 2; i++) {
854 put_bits(&s->pb, 1, s->field_select[0][i]);
855 mpeg1_encode_motion(s,
856 s->mv[0][i][0] - s->last_mv[0][i][0],
857 s->f_code);
858 mpeg1_encode_motion(s,
859 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
860 s->f_code);
861 s->last_mv[0][i][0] = s->mv[0][i][0];
862 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
863 }
864 s->mv_bits += get_bits_diff(s);
865 }
866 if (cbp) {
867 if (s->chroma_y_shift) {
868 put_bits(&s->pb,
869 ff_mpeg12_mbPatTable[cbp][1],
870 ff_mpeg12_mbPatTable[cbp][0]);
871 } else {
872 put_bits(&s->pb,
873 ff_mpeg12_mbPatTable[cbp >> 2][1],
874 ff_mpeg12_mbPatTable[cbp >> 2][0]);
875 put_sbits(&s->pb, 2, cbp);
876 }
877 }
878 s->f_count++;
879 } else {
880 if (s->mv_type == MV_TYPE_16X16) {
881 if (cbp) { // With coded bloc pattern
882 if (s->dquant) {
883 if (s->mv_dir == MV_DIR_FORWARD)
884 put_mb_modes(s, 6, 3, 1, 0);
885 else
886 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
887 put_qscale(s);
888 } else {
889 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
890 }
891 } else { // No coded bloc pattern
892 put_bits(&s->pb, 5 - s->mv_dir, 2);
893 if (!s->frame_pred_frame_dct)
894 put_bits(&s->pb, 2, 2); /* motion_type: frame */
895 s->qscale -= s->dquant;
896 }
897 s->misc_bits += get_bits_diff(s);
898 if (s->mv_dir & MV_DIR_FORWARD) {
899 mpeg1_encode_motion(s,
900 s->mv[0][0][0] - s->last_mv[0][0][0],
901 s->f_code);
902 mpeg1_encode_motion(s,
903 s->mv[0][0][1] - s->last_mv[0][0][1],
904 s->f_code);
905 s->last_mv[0][0][0] =
906 s->last_mv[0][1][0] = s->mv[0][0][0];
907 s->last_mv[0][0][1] =
908 s->last_mv[0][1][1] = s->mv[0][0][1];
909 s->f_count++;
910 }
911 if (s->mv_dir & MV_DIR_BACKWARD) {
912 mpeg1_encode_motion(s,
913 s->mv[1][0][0] - s->last_mv[1][0][0],
914 s->b_code);
915 mpeg1_encode_motion(s,
916 s->mv[1][0][1] - s->last_mv[1][0][1],
917 s->b_code);
918 s->last_mv[1][0][0] =
919 s->last_mv[1][1][0] = s->mv[1][0][0];
920 s->last_mv[1][0][1] =
921 s->last_mv[1][1][1] = s->mv[1][0][1];
922 s->b_count++;
923 }
924 } else {
925 av_assert2(s->mv_type == MV_TYPE_FIELD);
926 av_assert2(!s->frame_pred_frame_dct);
927 if (cbp) { // With coded bloc pattern
928 if (s->dquant) {
929 if (s->mv_dir == MV_DIR_FORWARD)
930 put_mb_modes(s, 6, 3, 1, 1);
931 else
932 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
933 put_qscale(s);
934 } else {
935 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
936 }
937 } else { // No coded bloc pattern
938 put_bits(&s->pb, 5 - s->mv_dir, 2);
939 put_bits(&s->pb, 2, 1); /* motion_type: field */
940 s->qscale -= s->dquant;
941 }
942 s->misc_bits += get_bits_diff(s);
943 if (s->mv_dir & MV_DIR_FORWARD) {
944 for (i = 0; i < 2; i++) {
945 put_bits(&s->pb, 1, s->field_select[0][i]);
946 mpeg1_encode_motion(s,
947 s->mv[0][i][0] - s->last_mv[0][i][0],
948 s->f_code);
949 mpeg1_encode_motion(s,
950 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
951 s->f_code);
952 s->last_mv[0][i][0] = s->mv[0][i][0];
953 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
954 }
955 s->f_count++;
956 }
957 if (s->mv_dir & MV_DIR_BACKWARD) {
958 for (i = 0; i < 2; i++) {
959 put_bits(&s->pb, 1, s->field_select[1][i]);
960 mpeg1_encode_motion(s,
961 s->mv[1][i][0] - s->last_mv[1][i][0],
962 s->b_code);
963 mpeg1_encode_motion(s,
964 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
965 s->b_code);
966 s->last_mv[1][i][0] = s->mv[1][i][0];
967 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
968 }
969 s->b_count++;
970 }
971 }
972 s->mv_bits += get_bits_diff(s);
973 if (cbp) {
974 if (s->chroma_y_shift) {
975 put_bits(&s->pb,
976 ff_mpeg12_mbPatTable[cbp][1],
977 ff_mpeg12_mbPatTable[cbp][0]);
978 } else {
979 put_bits(&s->pb,
980 ff_mpeg12_mbPatTable[cbp >> 2][1],
981 ff_mpeg12_mbPatTable[cbp >> 2][0]);
982 put_sbits(&s->pb, 2, cbp);
983 }
984 }
985 }
986 for (i = 0; i < mb_block_count; i++)
987 if (cbp & (1 << (mb_block_count - 1 - i)))
988 mpeg1_encode_block(s, block[i], i);
989 s->mb_skip_run = 0;
990 if (s->mb_intra)
991 s->i_tex_bits += get_bits_diff(s);
992 else
993 s->p_tex_bits += get_bits_diff(s);
994 }
995}
996
997void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
998 int motion_x, int motion_y)
999{
1000 if (s->chroma_format == CHROMA_420)
1001 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1002 else
1003 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1004}
1005
1006av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1007{
1008 static int done = 0;
1009
1010 ff_mpeg12_common_init(s);
1011
1012 if (!done) {
1013 int f_code;
1014 int mv;
1015 int i;
1016
1017 done = 1;
1018 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1019 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1020
1021 for (i = 0; i < 64; i++) {
1022 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1023 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1024 }
1025
1026 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1027 if (s->intra_vlc_format)
1028 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1029
1030 /* build unified dc encoding tables */
1031 for (i = -255; i < 256; i++) {
1032 int adiff, index;
1033 int bits, code;
1034 int diff = i;
1035
1036 adiff = FFABS(diff);
1037 if (diff < 0)
1038 diff--;
1039 index = av_log2(2 * adiff);
1040
1041 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1042 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1043 (diff & ((1 << index) - 1));
1044 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1045
1046 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1047 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1048 (diff & ((1 << index) - 1));
1049 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1050 }
1051
1052 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1053 for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1054 int len;
1055
1056 if (mv == 0) {
1057 len = ff_mpeg12_mbMotionVectorTable[0][1];
1058 } else {
1059 int val, bit_size, code;
1060
1061 bit_size = f_code - 1;
1062
1063 val = mv;
1064 if (val < 0)
1065 val = -val;
1066 val--;
1067 code = (val >> bit_size) + 1;
1068 if (code < 17)
1069 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1070 1 + bit_size;
1071 else
1072 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1073 2 + bit_size;
1074 }
1075
1076 mv_penalty[f_code][mv + MAX_MV] = len;
1077 }
1078
1079
1080 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1081 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1082 fcode_tab[mv + MAX_MV] = f_code;
1083 }
1084 s->me.mv_penalty = mv_penalty;
1085 s->fcode_tab = fcode_tab;
1086 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1087 s->min_qcoeff = -255;
1088 s->max_qcoeff = 255;
1089 } else {
1090 s->min_qcoeff = -2047;
1091 s->max_qcoeff = 2047;
1092 }
1093 if (s->intra_vlc_format) {
1094 s->intra_ac_vlc_length =
1095 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1096 } else {
1097 s->intra_ac_vlc_length =
1098 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1099 }
1100 s->inter_ac_vlc_length =
1101 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1102}
1103
1104#define OFFSET(x) offsetof(MpegEncContext, x)
1105#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1106#define COMMON_OPTS \
1107 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1108 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1109 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1110 OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1111 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1112 OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1113 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1114 OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1115
1116static const AVOption mpeg1_options[] = {
1117 COMMON_OPTS
1118 FF_MPV_COMMON_OPTS
1119 { NULL },
1120};
1121
1122static const AVOption mpeg2_options[] = {
1123 COMMON_OPTS
1124 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1125 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1126 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1127 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1128 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1129 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1130 FF_MPV_COMMON_OPTS
1131 { NULL },
1132};
1133
1134#define mpeg12_class(x) \
1135static const AVClass mpeg ## x ## _class = { \
1136 .class_name = "mpeg" # x "video encoder", \
1137 .item_name = av_default_item_name, \
1138 .option = mpeg ## x ## _options, \
1139 .version = LIBAVUTIL_VERSION_INT, \
1140};
1141
1142mpeg12_class(1)
1143mpeg12_class(2)
1144
1145AVCodec ff_mpeg1video_encoder = {
1146 .name = "mpeg1video",
1147 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1148 .type = AVMEDIA_TYPE_VIDEO,
1149 .id = AV_CODEC_ID_MPEG1VIDEO,
1150 .priv_data_size = sizeof(MpegEncContext),
1151 .init = encode_init,
1152 .encode2 = ff_mpv_encode_picture,
1153 .close = ff_mpv_encode_end,
1154 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1155 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1156 AV_PIX_FMT_NONE },
1157 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1158 .priv_class = &mpeg1_class,
1159};
1160
1161AVCodec ff_mpeg2video_encoder = {
1162 .name = "mpeg2video",
1163 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1164 .type = AVMEDIA_TYPE_VIDEO,
1165 .id = AV_CODEC_ID_MPEG2VIDEO,
1166 .priv_data_size = sizeof(MpegEncContext),
1167 .init = encode_init,
1168 .encode2 = ff_mpv_encode_picture,
1169 .close = ff_mpv_encode_end,
1170 .supported_framerates = ff_mpeg2_frame_rate_tab,
1171 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1172 AV_PIX_FMT_YUV422P,
1173 AV_PIX_FMT_NONE },
1174 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1175 .priv_class = &mpeg2_class,
1176};
ffmpeg Piment Noir Debian package repository