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Imported Debian version 2.5.0~trusty1.1
[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{
f6fa7814
DM		 609 unsigned int diff_u = diff + 255;
610 if (diff_u >= 511) {
2ba45a60
DM		 611 int index;
612
613 if (diff < 0) {
614 index = av_log2_16bit(-2 * diff);
615 diff--;
616 } else {
617 index = av_log2_16bit(2 * diff);
618 }
619 if (component == 0)
620 put_bits(&s->pb,
621 ff_mpeg12_vlc_dc_lum_bits[index] + index,
622 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
623 (diff & ((1 << index) - 1)));
624 else
625 put_bits(&s->pb,
626 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
627 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
628 (diff & ((1 << index) - 1)));
629 } else {
630 if (component == 0)
631 put_bits(&s->pb,
632 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
633 mpeg1_lum_dc_uni[diff + 255] >> 8);
634 else
635 put_bits(&s->pb,
636 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
637 mpeg1_chr_dc_uni[diff + 255] >> 8);
638 }
639}
640
641static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
642{
643 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
644 int code, component;
645 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
646
647 last_index = s->block_last_index[n];
648
649 /* DC coef */
650 if (s->mb_intra) {
651 component = (n <= 3 ? 0 : (n & 1) + 1);
652 dc = block[0]; /* overflow is impossible */
653 diff = dc - s->last_dc[component];
654 encode_dc(s, diff, component);
655 s->last_dc[component] = dc;
656 i = 1;
657 if (s->intra_vlc_format)
658 table_vlc = ff_rl_mpeg2.table_vlc;
659 } else {
660 /* encode the first coefficient: needs to be done here because
661 * it is handled slightly differently */
662 level = block[0];
663 if (abs(level) == 1) {
664 code = ((uint32_t)level >> 31); /* the sign bit */
665 put_bits(&s->pb, 2, code | 0x02);
666 i = 1;
667 } else {
668 i = 0;
669 last_non_zero = -1;
670 goto next_coef;
671 }
672 }
673
674 /* now quantify & encode AC coefs */
675 last_non_zero = i - 1;
676
677 for (; i <= last_index; i++) {
678 j = s->intra_scantable.permutated[i];
679 level = block[j];
680
681next_coef:
682 /* encode using VLC */
683 if (level != 0) {
684 run = i - last_non_zero - 1;
685
686 alevel = level;
687 MASK_ABS(sign, alevel);
688 sign &= 1;
689
690 if (alevel <= mpeg1_max_level[0][run]) {
691 code = mpeg1_index_run[0][run] + alevel - 1;
692 /* store the VLC & sign at once */
693 put_bits(&s->pb, table_vlc[code][1] + 1,
694 (table_vlc[code][0] << 1) + sign);
695 } else {
696 /* escape seems to be pretty rare <5% so I do not optimize it */
697 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
698 /* escape: only clip in this case */
699 put_bits(&s->pb, 6, run);
700 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
701 if (alevel < 128) {
702 put_sbits(&s->pb, 8, level);
703 } else {
704 if (level < 0)
705 put_bits(&s->pb, 16, 0x8001 + level + 255);
706 else
707 put_sbits(&s->pb, 16, level);
708 }
709 } else {
710 put_sbits(&s->pb, 12, level);
711 }
712 }
713 last_non_zero = i;
714 }
715 }
716 /* end of block */
717 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
718}
719
720static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
721 int16_t block[8][64],
722 int motion_x, int motion_y,
723 int mb_block_count)
724{
725 int i, cbp;
726 const int mb_x = s->mb_x;
727 const int mb_y = s->mb_y;
728 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
729
730 /* compute cbp */
731 cbp = 0;
732 for (i = 0; i < mb_block_count; i++)
733 if (s->block_last_index[i] >= 0)
734 cbp |= 1 << (mb_block_count - 1 - i);
735
736 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
737 (mb_x != s->mb_width - 1 ||
738 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
739 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
740 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
741 (((s->mv_dir & MV_DIR_FORWARD)
742 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
743 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
744 ((s->mv_dir & MV_DIR_BACKWARD)
745 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
746 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
747 s->mb_skip_run++;
748 s->qscale -= s->dquant;
749 s->skip_count++;
750 s->misc_bits++;
751 s->last_bits++;
752 if (s->pict_type == AV_PICTURE_TYPE_P) {
753 s->last_mv[0][0][0] =
754 s->last_mv[0][0][1] =
755 s->last_mv[0][1][0] =
756 s->last_mv[0][1][1] = 0;
757 }
758 } else {
759 if (first_mb) {
760 av_assert0(s->mb_skip_run == 0);
761 encode_mb_skip_run(s, s->mb_x);
762 } else {
763 encode_mb_skip_run(s, s->mb_skip_run);
764 }
765
766 if (s->pict_type == AV_PICTURE_TYPE_I) {
767 if (s->dquant && cbp) {
768 /* macroblock_type: macroblock_quant = 1 */
769 put_mb_modes(s, 2, 1, 0, 0);
770 put_qscale(s);
771 } else {
772 /* macroblock_type: macroblock_quant = 0 */
773 put_mb_modes(s, 1, 1, 0, 0);
774 s->qscale -= s->dquant;
775 }
776 s->misc_bits += get_bits_diff(s);
777 s->i_count++;
778 } else if (s->mb_intra) {
779 if (s->dquant && cbp) {
780 put_mb_modes(s, 6, 0x01, 0, 0);
781 put_qscale(s);
782 } else {
783 put_mb_modes(s, 5, 0x03, 0, 0);
784 s->qscale -= s->dquant;
785 }
786 s->misc_bits += get_bits_diff(s);
787 s->i_count++;
788 memset(s->last_mv, 0, sizeof(s->last_mv));
789 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
790 if (s->mv_type == MV_TYPE_16X16) {
791 if (cbp != 0) {
792 if ((motion_x | motion_y) == 0) {
793 if (s->dquant) {
794 /* macroblock_pattern & quant */
795 put_mb_modes(s, 5, 1, 0, 0);
796 put_qscale(s);
797 } else {
798 /* macroblock_pattern only */
799 put_mb_modes(s, 2, 1, 0, 0);
800 }
801 s->misc_bits += get_bits_diff(s);
802 } else {
803 if (s->dquant) {
804 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
805 put_qscale(s);
806 } else {
807 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
808 }
809 s->misc_bits += get_bits_diff(s);
810 // RAL: f_code parameter added
811 mpeg1_encode_motion(s,
812 motion_x - s->last_mv[0][0][0],
813 s->f_code);
814 // RAL: f_code parameter added
815 mpeg1_encode_motion(s,
816 motion_y - s->last_mv[0][0][1],
817 s->f_code);
818 s->mv_bits += get_bits_diff(s);
819 }
820 } else {
821 put_bits(&s->pb, 3, 1); /* motion only */
822 if (!s->frame_pred_frame_dct)
823 put_bits(&s->pb, 2, 2); /* motion_type: frame */
824 s->misc_bits += get_bits_diff(s);
825 // RAL: f_code parameter added
826 mpeg1_encode_motion(s,
827 motion_x - s->last_mv[0][0][0],
828 s->f_code);
829 // RAL: f_code parameter added
830 mpeg1_encode_motion(s,
831 motion_y - s->last_mv[0][0][1],
832 s->f_code);
833 s->qscale -= s->dquant;
834 s->mv_bits += get_bits_diff(s);
835 }
836 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
837 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
838 } else {
839 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
840
841 if (cbp) {
842 if (s->dquant) {
843 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
844 put_qscale(s);
845 } else {
846 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
847 }
848 } else {
849 put_bits(&s->pb, 3, 1); /* motion only */
850 put_bits(&s->pb, 2, 1); /* motion_type: field */
851 s->qscale -= s->dquant;
852 }
853 s->misc_bits += get_bits_diff(s);
854 for (i = 0; i < 2; i++) {
855 put_bits(&s->pb, 1, s->field_select[0][i]);
856 mpeg1_encode_motion(s,
857 s->mv[0][i][0] - s->last_mv[0][i][0],
858 s->f_code);
859 mpeg1_encode_motion(s,
860 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
861 s->f_code);
862 s->last_mv[0][i][0] = s->mv[0][i][0];
863 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
864 }
865 s->mv_bits += get_bits_diff(s);
866 }
867 if (cbp) {
868 if (s->chroma_y_shift) {
869 put_bits(&s->pb,
870 ff_mpeg12_mbPatTable[cbp][1],
871 ff_mpeg12_mbPatTable[cbp][0]);
872 } else {
873 put_bits(&s->pb,
874 ff_mpeg12_mbPatTable[cbp >> 2][1],
875 ff_mpeg12_mbPatTable[cbp >> 2][0]);
876 put_sbits(&s->pb, 2, cbp);
877 }
878 }
879 s->f_count++;
880 } else {
881 if (s->mv_type == MV_TYPE_16X16) {
882 if (cbp) { // With coded bloc pattern
883 if (s->dquant) {
884 if (s->mv_dir == MV_DIR_FORWARD)
885 put_mb_modes(s, 6, 3, 1, 0);
886 else
887 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
888 put_qscale(s);
889 } else {
890 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
891 }
892 } else { // No coded bloc pattern
893 put_bits(&s->pb, 5 - s->mv_dir, 2);
894 if (!s->frame_pred_frame_dct)
895 put_bits(&s->pb, 2, 2); /* motion_type: frame */
896 s->qscale -= s->dquant;
897 }
898 s->misc_bits += get_bits_diff(s);
899 if (s->mv_dir & MV_DIR_FORWARD) {
900 mpeg1_encode_motion(s,
901 s->mv[0][0][0] - s->last_mv[0][0][0],
902 s->f_code);
903 mpeg1_encode_motion(s,
904 s->mv[0][0][1] - s->last_mv[0][0][1],
905 s->f_code);
906 s->last_mv[0][0][0] =
907 s->last_mv[0][1][0] = s->mv[0][0][0];
908 s->last_mv[0][0][1] =
909 s->last_mv[0][1][1] = s->mv[0][0][1];
910 s->f_count++;
911 }
912 if (s->mv_dir & MV_DIR_BACKWARD) {
913 mpeg1_encode_motion(s,
914 s->mv[1][0][0] - s->last_mv[1][0][0],
915 s->b_code);
916 mpeg1_encode_motion(s,
917 s->mv[1][0][1] - s->last_mv[1][0][1],
918 s->b_code);
919 s->last_mv[1][0][0] =
920 s->last_mv[1][1][0] = s->mv[1][0][0];
921 s->last_mv[1][0][1] =
922 s->last_mv[1][1][1] = s->mv[1][0][1];
923 s->b_count++;
924 }
925 } else {
926 av_assert2(s->mv_type == MV_TYPE_FIELD);
927 av_assert2(!s->frame_pred_frame_dct);
928 if (cbp) { // With coded bloc pattern
929 if (s->dquant) {
930 if (s->mv_dir == MV_DIR_FORWARD)
931 put_mb_modes(s, 6, 3, 1, 1);
932 else
933 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
934 put_qscale(s);
935 } else {
936 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
937 }
938 } else { // No coded bloc pattern
939 put_bits(&s->pb, 5 - s->mv_dir, 2);
940 put_bits(&s->pb, 2, 1); /* motion_type: field */
941 s->qscale -= s->dquant;
942 }
943 s->misc_bits += get_bits_diff(s);
944 if (s->mv_dir & MV_DIR_FORWARD) {
945 for (i = 0; i < 2; i++) {
946 put_bits(&s->pb, 1, s->field_select[0][i]);
947 mpeg1_encode_motion(s,
948 s->mv[0][i][0] - s->last_mv[0][i][0],
949 s->f_code);
950 mpeg1_encode_motion(s,
951 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
952 s->f_code);
953 s->last_mv[0][i][0] = s->mv[0][i][0];
954 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
955 }
956 s->f_count++;
957 }
958 if (s->mv_dir & MV_DIR_BACKWARD) {
959 for (i = 0; i < 2; i++) {
960 put_bits(&s->pb, 1, s->field_select[1][i]);
961 mpeg1_encode_motion(s,
962 s->mv[1][i][0] - s->last_mv[1][i][0],
963 s->b_code);
964 mpeg1_encode_motion(s,
965 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
966 s->b_code);
967 s->last_mv[1][i][0] = s->mv[1][i][0];
968 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
969 }
970 s->b_count++;
971 }
972 }
973 s->mv_bits += get_bits_diff(s);
974 if (cbp) {
975 if (s->chroma_y_shift) {
976 put_bits(&s->pb,
977 ff_mpeg12_mbPatTable[cbp][1],
978 ff_mpeg12_mbPatTable[cbp][0]);
979 } else {
980 put_bits(&s->pb,
981 ff_mpeg12_mbPatTable[cbp >> 2][1],
982 ff_mpeg12_mbPatTable[cbp >> 2][0]);
983 put_sbits(&s->pb, 2, cbp);
984 }
985 }
986 }
987 for (i = 0; i < mb_block_count; i++)
988 if (cbp & (1 << (mb_block_count - 1 - i)))
989 mpeg1_encode_block(s, block[i], i);
990 s->mb_skip_run = 0;
991 if (s->mb_intra)
992 s->i_tex_bits += get_bits_diff(s);
993 else
994 s->p_tex_bits += get_bits_diff(s);
995 }
996}
997
998void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
999 int motion_x, int motion_y)
1000{
1001 if (s->chroma_format == CHROMA_420)
1002 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1003 else
1004 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1005}
1006
1007av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1008{
1009 static int done = 0;
1010
1011 ff_mpeg12_common_init(s);
1012
1013 if (!done) {
1014 int f_code;
1015 int mv;
1016 int i;
1017
1018 done = 1;
1019 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1020 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1021
1022 for (i = 0; i < 64; i++) {
1023 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1024 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1025 }
1026
1027 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1028 if (s->intra_vlc_format)
1029 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1030
1031 /* build unified dc encoding tables */
1032 for (i = -255; i < 256; i++) {
1033 int adiff, index;
1034 int bits, code;
1035 int diff = i;
1036
1037 adiff = FFABS(diff);
1038 if (diff < 0)
1039 diff--;
1040 index = av_log2(2 * adiff);
1041
1042 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1043 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1044 (diff & ((1 << index) - 1));
1045 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1046
1047 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1048 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1049 (diff & ((1 << index) - 1));
1050 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1051 }
1052
1053 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1054 for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1055 int len;
1056
1057 if (mv == 0) {
1058 len = ff_mpeg12_mbMotionVectorTable[0][1];
1059 } else {
1060 int val, bit_size, code;
1061
1062 bit_size = f_code - 1;
1063
1064 val = mv;
1065 if (val < 0)
1066 val = -val;
1067 val--;
1068 code = (val >> bit_size) + 1;
1069 if (code < 17)
1070 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1071 1 + bit_size;
1072 else
1073 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1074 2 + bit_size;
1075 }
1076
1077 mv_penalty[f_code][mv + MAX_MV] = len;
1078 }
1079
1080
1081 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1082 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1083 fcode_tab[mv + MAX_MV] = f_code;
1084 }
1085 s->me.mv_penalty = mv_penalty;
1086 s->fcode_tab = fcode_tab;
1087 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1088 s->min_qcoeff = -255;
1089 s->max_qcoeff = 255;
1090 } else {
1091 s->min_qcoeff = -2047;
1092 s->max_qcoeff = 2047;
1093 }
1094 if (s->intra_vlc_format) {
1095 s->intra_ac_vlc_length =
1096 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1097 } else {
1098 s->intra_ac_vlc_length =
1099 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1100 }
1101 s->inter_ac_vlc_length =
1102 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1103}
1104
1105#define OFFSET(x) offsetof(MpegEncContext, x)
1106#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1107#define COMMON_OPTS \
1108 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1109 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1110 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1111 OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1112 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1113 OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1114 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1115 OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1116
1117static const AVOption mpeg1_options[] = {
1118 COMMON_OPTS
1119 FF_MPV_COMMON_OPTS
1120 { NULL },
1121};
1122
1123static const AVOption mpeg2_options[] = {
1124 COMMON_OPTS
1125 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1126 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1127 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1128 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1129 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1130 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1131 FF_MPV_COMMON_OPTS
1132 { NULL },
1133};
1134
1135#define mpeg12_class(x) \
1136static const AVClass mpeg ## x ## _class = { \
1137 .class_name = "mpeg" # x "video encoder", \
1138 .item_name = av_default_item_name, \
1139 .option = mpeg ## x ## _options, \
1140 .version = LIBAVUTIL_VERSION_INT, \
1141};
1142
1143mpeg12_class(1)
1144mpeg12_class(2)
1145
1146AVCodec ff_mpeg1video_encoder = {
1147 .name = "mpeg1video",
1148 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1149 .type = AVMEDIA_TYPE_VIDEO,
1150 .id = AV_CODEC_ID_MPEG1VIDEO,
1151 .priv_data_size = sizeof(MpegEncContext),
1152 .init = encode_init,
1153 .encode2 = ff_mpv_encode_picture,
1154 .close = ff_mpv_encode_end,
1155 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1156 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1157 AV_PIX_FMT_NONE },
1158 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1159 .priv_class = &mpeg1_class,
1160};
1161
1162AVCodec ff_mpeg2video_encoder = {
1163 .name = "mpeg2video",
1164 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1165 .type = AVMEDIA_TYPE_VIDEO,
1166 .id = AV_CODEC_ID_MPEG2VIDEO,
1167 .priv_data_size = sizeof(MpegEncContext),
1168 .init = encode_init,
1169 .encode2 = ff_mpv_encode_picture,
1170 .close = ff_mpv_encode_end,
1171 .supported_framerates = ff_mpeg2_frame_rate_tab,
1172 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1173 AV_PIX_FMT_YUV422P,
1174 AV_PIX_FMT_NONE },
1175 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1176 .priv_class = &mpeg2_class,
1177};
ffmpeg Piment Noir Debian package repository