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1/*
2 * MPEG-1/2 encoder
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23/**
24 * @file
25 * MPEG-1/2 encoder
26 */
27
28#include <stdint.h>
29
30#include "libavutil/attributes.h"
31#include "libavutil/avassert.h"
32#include "libavutil/log.h"
33#include "libavutil/opt.h"
34#include "libavutil/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
45static const uint8_t svcd_scan_offset_placeholder[] = {
46 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
47 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
48};
49
50static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
51static uint8_t fcode_tab[MAX_MV * 2 + 1];
52
53static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
54static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
55
56/* simple include everything table for dc, first byte is bits
57 * number next 3 are code */
58static uint32_t mpeg1_lum_dc_uni[512];
59static uint32_t mpeg1_chr_dc_uni[512];
60
61static uint8_t mpeg1_index_run[2][64];
62static int8_t mpeg1_max_level[2][64];
63
64static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
65{
66 int i;
67
68 for (i = 0; i < 128; i++) {
69 int level = i - 64;
70 int run;
71 if (!level)
72 continue;
73 for (run = 0; run < 64; run++) {
74 int len, code;
75 int alevel = FFABS(level);
76
77 if (alevel > rl->max_level[0][run])
78 code = 111; /* rl->n */
79 else
80 code = rl->index_run[0][run] + alevel - 1;
81
82 if (code < 111) { /* rl->n */
83 /* length of VLC and sign */
84 len = rl->table_vlc[code][1] + 1;
85 } else {
86 len = rl->table_vlc[111 /* rl->n */][1] + 6;
87
88 if (alevel < 128)
89 len += 8;
90 else
91 len += 16;
92 }
93
94 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
95 }
96 }
97}
98
99static int find_frame_rate_index(MpegEncContext *s)
100{
101 int i;
102 AVRational bestq = (AVRational) {0, 0};
103 AVRational ext;
104 AVRational target = av_inv_q(s->avctx->time_base);
105
106 for (i = 1; i < 14; i++) {
107 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
108 i >= 9)
109 break;
110
111 for (ext.num=1; ext.num <= 4; ext.num++) {
112 for (ext.den=1; ext.den <= 32; ext.den++) {
113 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
114
115 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
116 continue;
117 if (av_gcd(ext.den, ext.num) != 1)
118 continue;
119
120 if ( bestq.num==0
121 || av_nearer_q(target, bestq, q) < 0
122 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
123 bestq = q;
124 s->frame_rate_index = i;
125 s->mpeg2_frame_rate_ext.num = ext.num;
126 s->mpeg2_frame_rate_ext.den = ext.den;
127 }
128 }
129 }
130 }
131
132 if (av_cmp_q(target, bestq))
133 return -1;
134 else
135 return 0;
136}
137
138static av_cold int encode_init(AVCodecContext *avctx)
139{
140 MpegEncContext *s = avctx->priv_data;
141
142 if (ff_mpv_encode_init(avctx) < 0)
143 return -1;
144
145 if (find_frame_rate_index(s) < 0) {
146 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
147 av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
148 avctx->time_base.den, avctx->time_base.num);
149 return -1;
150 } else {
151 av_log(avctx, AV_LOG_INFO,
152 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
153 avctx->time_base.den, avctx->time_base.num);
154 }
155 }
156
157 if (avctx->profile == FF_PROFILE_UNKNOWN) {
158 if (avctx->level != FF_LEVEL_UNKNOWN) {
159 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
160 return -1;
161 }
162 /* Main or 4:2:2 */
163 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
164 }
165
166 if (avctx->level == FF_LEVEL_UNKNOWN) {
167 if (avctx->profile == 0) { /* 4:2:2 */
168 if (avctx->width <= 720 && avctx->height <= 608)
169 avctx->level = 5; /* Main */
170 else
171 avctx->level = 2; /* High */
172 } else {
173 if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
174 av_log(avctx, AV_LOG_ERROR,
175 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
176 return -1;
177 }
178 if (avctx->width <= 720 && avctx->height <= 576)
179 avctx->level = 8; /* Main */
180 else if (avctx->width <= 1440)
181 avctx->level = 6; /* High 1440 */
182 else
183 avctx->level = 4; /* High */
184 }
185 }
186
187 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
188 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
189 return AVERROR(EINVAL);
190 }
191
192 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
193 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
194 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
195 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
196 return AVERROR(EINVAL);
197 }
198 }
199
200 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
201 if (s->drop_frame_timecode)
202 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
203 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
204 av_log(avctx, AV_LOG_ERROR,
205 "Drop frame time code only allowed with 1001/30000 fps\n");
206 return -1;
207 }
208
209#if FF_API_PRIVATE_OPT
210FF_DISABLE_DEPRECATION_WARNINGS
211 if (avctx->timecode_frame_start)
212 s->timecode_frame_start = avctx->timecode_frame_start;
213FF_ENABLE_DEPRECATION_WARNINGS
214#endif
215
216 if (s->tc_opt_str) {
217 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
218 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
219 if (ret < 0)
220 return ret;
221 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
222 s->timecode_frame_start = s->tc.start;
223 } else {
224 s->timecode_frame_start = 0; // default is -1
225 }
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 /* MPEG-1 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->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->avctx->flags & AV_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 put_bits(&s->pb, 5, s->qscale);
405}
406
407void ff_mpeg1_encode_slice_header(MpegEncContext *s)
408{
409 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
410 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
411 /* slice_vertical_position_extension */
412 put_bits(&s->pb, 3, s->mb_y >> 7);
413 } else {
414 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
415 }
416 put_qscale(s);
417 /* slice extra information */
418 put_bits(&s->pb, 1, 0);
419}
420
421void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
422{
423 AVFrameSideData *side_data;
424 mpeg1_encode_sequence_header(s);
425
426 /* MPEG-1 picture header */
427 put_header(s, PICTURE_START_CODE);
428 /* temporal reference */
429
430 // RAL: s->picture_number instead of s->fake_picture_number
431 put_bits(&s->pb, 10,
432 (s->picture_number - s->gop_picture_number) & 0x3ff);
433 put_bits(&s->pb, 3, s->pict_type);
434
435 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
436 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
437
438 // RAL: Forward f_code also needed for B-frames
439 if (s->pict_type == AV_PICTURE_TYPE_P ||
440 s->pict_type == AV_PICTURE_TYPE_B) {
441 put_bits(&s->pb, 1, 0); /* half pel coordinates */
442 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
443 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
444 else
445 put_bits(&s->pb, 3, 7); /* forward_f_code */
446 }
447
448 // RAL: Backward f_code necessary for B-frames
449 if (s->pict_type == AV_PICTURE_TYPE_B) {
450 put_bits(&s->pb, 1, 0); /* half pel coordinates */
451 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
452 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
453 else
454 put_bits(&s->pb, 3, 7); /* backward_f_code */
455 }
456
457 put_bits(&s->pb, 1, 0); /* extra bit picture */
458
459 s->frame_pred_frame_dct = 1;
460 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
461 put_header(s, EXT_START_CODE);
462 put_bits(&s->pb, 4, 8); /* pic ext */
463 if (s->pict_type == AV_PICTURE_TYPE_P ||
464 s->pict_type == AV_PICTURE_TYPE_B) {
465 put_bits(&s->pb, 4, s->f_code);
466 put_bits(&s->pb, 4, s->f_code);
467 } else {
468 put_bits(&s->pb, 8, 255);
469 }
470 if (s->pict_type == AV_PICTURE_TYPE_B) {
471 put_bits(&s->pb, 4, s->b_code);
472 put_bits(&s->pb, 4, s->b_code);
473 } else {
474 put_bits(&s->pb, 8, 255);
475 }
476 put_bits(&s->pb, 2, s->intra_dc_precision);
477
478 av_assert0(s->picture_structure == PICT_FRAME);
479 put_bits(&s->pb, 2, s->picture_structure);
480 if (s->progressive_sequence)
481 put_bits(&s->pb, 1, 0); /* no repeat */
482 else
483 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
484 /* XXX: optimize the generation of this flag with entropy measures */
485 s->frame_pred_frame_dct = s->progressive_sequence;
486
487 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
488 put_bits(&s->pb, 1, s->concealment_motion_vectors);
489 put_bits(&s->pb, 1, s->q_scale_type);
490 put_bits(&s->pb, 1, s->intra_vlc_format);
491 put_bits(&s->pb, 1, s->alternate_scan);
492 put_bits(&s->pb, 1, s->repeat_first_field);
493 s->progressive_frame = s->progressive_sequence;
494 /* chroma_420_type */
495 put_bits(&s->pb, 1, s->chroma_format ==
496 CHROMA_420 ? s->progressive_frame : 0);
497 put_bits(&s->pb, 1, s->progressive_frame);
498 put_bits(&s->pb, 1, 0); /* composite_display_flag */
499 }
500 if (s->scan_offset) {
501 int i;
502
503 put_header(s, USER_START_CODE);
504 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
505 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
506 }
507 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
508 AV_FRAME_DATA_STEREO3D);
509 if (side_data) {
510 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
511 uint8_t fpa_type;
512
513 switch (stereo->type) {
514 case AV_STEREO3D_SIDEBYSIDE:
515 fpa_type = 0x03;
516 break;
517 case AV_STEREO3D_TOPBOTTOM:
518 fpa_type = 0x04;
519 break;
520 case AV_STEREO3D_2D:
521 fpa_type = 0x08;
522 break;
523 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
524 fpa_type = 0x23;
525 break;
526 default:
527 fpa_type = 0;
528 break;
529 }
530
531 if (fpa_type != 0) {
532 put_header(s, USER_START_CODE);
533 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
534 put_bits(&s->pb, 8, 'P');
535 put_bits(&s->pb, 8, '3');
536 put_bits(&s->pb, 8, 'D');
537 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
538
539 put_bits(&s->pb, 1, 1); // reserved_bit
540 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
541 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
542 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
543 }
544 }
545
546 s->mb_y = 0;
547 ff_mpeg1_encode_slice_header(s);
548}
549
550static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
551 int has_mv, int field_motion)
552{
553 put_bits(&s->pb, n, bits);
554 if (!s->frame_pred_frame_dct) {
555 if (has_mv)
556 /* motion_type: frame/field */
557 put_bits(&s->pb, 2, 2 - field_motion);
558 put_bits(&s->pb, 1, s->interlaced_dct);
559 }
560}
561
562// RAL: Parameter added: f_or_b_code
563static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
564{
565 if (val == 0) {
566 /* zero vector */
567 put_bits(&s->pb,
568 ff_mpeg12_mbMotionVectorTable[0][1],
569 ff_mpeg12_mbMotionVectorTable[0][0]);
570 } else {
571 int code, sign, bits;
572 int bit_size = f_or_b_code - 1;
573 int range = 1 << bit_size;
574 /* modulo encoding */
575 val = sign_extend(val, 5 + bit_size);
576
577 if (val >= 0) {
578 val--;
579 code = (val >> bit_size) + 1;
580 bits = val & (range - 1);
581 sign = 0;
582 } else {
583 val = -val;
584 val--;
585 code = (val >> bit_size) + 1;
586 bits = val & (range - 1);
587 sign = 1;
588 }
589
590 av_assert2(code > 0 && code <= 16);
591
592 put_bits(&s->pb,
593 ff_mpeg12_mbMotionVectorTable[code][1],
594 ff_mpeg12_mbMotionVectorTable[code][0]);
595
596 put_bits(&s->pb, 1, sign);
597 if (bit_size > 0)
598 put_bits(&s->pb, bit_size, bits);
599 }
600}
601
602static inline void encode_dc(MpegEncContext *s, int diff, int component)
603{
604 unsigned int diff_u = diff + 255;
605 if (diff_u >= 511) {
606 int index;
607
608 if (diff < 0) {
609 index = av_log2_16bit(-2 * diff);
610 diff--;
611 } else {
612 index = av_log2_16bit(2 * diff);
613 }
614 if (component == 0)
615 put_bits(&s->pb,
616 ff_mpeg12_vlc_dc_lum_bits[index] + index,
617 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
618 av_mod_uintp2(diff, index));
619 else
620 put_bits(&s->pb,
621 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
622 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
623 av_mod_uintp2(diff, index));
624 } else {
625 if (component == 0)
626 put_bits(&s->pb,
627 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
628 mpeg1_lum_dc_uni[diff + 255] >> 8);
629 else
630 put_bits(&s->pb,
631 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
632 mpeg1_chr_dc_uni[diff + 255] >> 8);
633 }
634}
635
636static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
637{
638 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
639 int code, component;
640 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
641
642 last_index = s->block_last_index[n];
643
644 /* DC coef */
645 if (s->mb_intra) {
646 component = (n <= 3 ? 0 : (n & 1) + 1);
647 dc = block[0]; /* overflow is impossible */
648 diff = dc - s->last_dc[component];
649 encode_dc(s, diff, component);
650 s->last_dc[component] = dc;
651 i = 1;
652 if (s->intra_vlc_format)
653 table_vlc = ff_rl_mpeg2.table_vlc;
654 } else {
655 /* encode the first coefficient: needs to be done here because
656 * it is handled slightly differently */
657 level = block[0];
658 if (abs(level) == 1) {
659 code = ((uint32_t)level >> 31); /* the sign bit */
660 put_bits(&s->pb, 2, code | 0x02);
661 i = 1;
662 } else {
663 i = 0;
664 last_non_zero = -1;
665 goto next_coef;
666 }
667 }
668
669 /* now quantify & encode AC coefs */
670 last_non_zero = i - 1;
671
672 for (; i <= last_index; i++) {
673 j = s->intra_scantable.permutated[i];
674 level = block[j];
675
676next_coef:
677 /* encode using VLC */
678 if (level != 0) {
679 run = i - last_non_zero - 1;
680
681 alevel = level;
682 MASK_ABS(sign, alevel);
683 sign &= 1;
684
685 if (alevel <= mpeg1_max_level[0][run]) {
686 code = mpeg1_index_run[0][run] + alevel - 1;
687 /* store the VLC & sign at once */
688 put_bits(&s->pb, table_vlc[code][1] + 1,
689 (table_vlc[code][0] << 1) + sign);
690 } else {
691 /* escape seems to be pretty rare <5% so I do not optimize it */
692 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
693 /* escape: only clip in this case */
694 put_bits(&s->pb, 6, run);
695 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
696 if (alevel < 128) {
697 put_sbits(&s->pb, 8, level);
698 } else {
699 if (level < 0)
700 put_bits(&s->pb, 16, 0x8001 + level + 255);
701 else
702 put_sbits(&s->pb, 16, level);
703 }
704 } else {
705 put_sbits(&s->pb, 12, level);
706 }
707 }
708 last_non_zero = i;
709 }
710 }
711 /* end of block */
712 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
713}
714
715static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
716 int16_t block[8][64],
717 int motion_x, int motion_y,
718 int mb_block_count)
719{
720 int i, cbp;
721 const int mb_x = s->mb_x;
722 const int mb_y = s->mb_y;
723 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
724
725 /* compute cbp */
726 cbp = 0;
727 for (i = 0; i < mb_block_count; i++)
728 if (s->block_last_index[i] >= 0)
729 cbp |= 1 << (mb_block_count - 1 - i);
730
731 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
732 (mb_x != s->mb_width - 1 ||
733 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
734 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
735 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
736 (((s->mv_dir & MV_DIR_FORWARD)
737 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
738 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
739 ((s->mv_dir & MV_DIR_BACKWARD)
740 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
741 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
742 s->mb_skip_run++;
743 s->qscale -= s->dquant;
744 s->skip_count++;
745 s->misc_bits++;
746 s->last_bits++;
747 if (s->pict_type == AV_PICTURE_TYPE_P) {
748 s->last_mv[0][0][0] =
749 s->last_mv[0][0][1] =
750 s->last_mv[0][1][0] =
751 s->last_mv[0][1][1] = 0;
752 }
753 } else {
754 if (first_mb) {
755 av_assert0(s->mb_skip_run == 0);
756 encode_mb_skip_run(s, s->mb_x);
757 } else {
758 encode_mb_skip_run(s, s->mb_skip_run);
759 }
760
761 if (s->pict_type == AV_PICTURE_TYPE_I) {
762 if (s->dquant && cbp) {
763 /* macroblock_type: macroblock_quant = 1 */
764 put_mb_modes(s, 2, 1, 0, 0);
765 put_qscale(s);
766 } else {
767 /* macroblock_type: macroblock_quant = 0 */
768 put_mb_modes(s, 1, 1, 0, 0);
769 s->qscale -= s->dquant;
770 }
771 s->misc_bits += get_bits_diff(s);
772 s->i_count++;
773 } else if (s->mb_intra) {
774 if (s->dquant && cbp) {
775 put_mb_modes(s, 6, 0x01, 0, 0);
776 put_qscale(s);
777 } else {
778 put_mb_modes(s, 5, 0x03, 0, 0);
779 s->qscale -= s->dquant;
780 }
781 s->misc_bits += get_bits_diff(s);
782 s->i_count++;
783 memset(s->last_mv, 0, sizeof(s->last_mv));
784 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
785 if (s->mv_type == MV_TYPE_16X16) {
786 if (cbp != 0) {
787 if ((motion_x | motion_y) == 0) {
788 if (s->dquant) {
789 /* macroblock_pattern & quant */
790 put_mb_modes(s, 5, 1, 0, 0);
791 put_qscale(s);
792 } else {
793 /* macroblock_pattern only */
794 put_mb_modes(s, 2, 1, 0, 0);
795 }
796 s->misc_bits += get_bits_diff(s);
797 } else {
798 if (s->dquant) {
799 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
800 put_qscale(s);
801 } else {
802 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
803 }
804 s->misc_bits += get_bits_diff(s);
805 // RAL: f_code parameter added
806 mpeg1_encode_motion(s,
807 motion_x - s->last_mv[0][0][0],
808 s->f_code);
809 // RAL: f_code parameter added
810 mpeg1_encode_motion(s,
811 motion_y - s->last_mv[0][0][1],
812 s->f_code);
813 s->mv_bits += get_bits_diff(s);
814 }
815 } else {
816 put_bits(&s->pb, 3, 1); /* motion only */
817 if (!s->frame_pred_frame_dct)
818 put_bits(&s->pb, 2, 2); /* motion_type: frame */
819 s->misc_bits += get_bits_diff(s);
820 // RAL: f_code parameter added
821 mpeg1_encode_motion(s,
822 motion_x - s->last_mv[0][0][0],
823 s->f_code);
824 // RAL: f_code parameter added
825 mpeg1_encode_motion(s,
826 motion_y - s->last_mv[0][0][1],
827 s->f_code);
828 s->qscale -= s->dquant;
829 s->mv_bits += get_bits_diff(s);
830 }
831 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
832 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
833 } else {
834 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
835
836 if (cbp) {
837 if (s->dquant) {
838 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
839 put_qscale(s);
840 } else {
841 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
842 }
843 } else {
844 put_bits(&s->pb, 3, 1); /* motion only */
845 put_bits(&s->pb, 2, 1); /* motion_type: field */
846 s->qscale -= s->dquant;
847 }
848 s->misc_bits += get_bits_diff(s);
849 for (i = 0; i < 2; i++) {
850 put_bits(&s->pb, 1, s->field_select[0][i]);
851 mpeg1_encode_motion(s,
852 s->mv[0][i][0] - s->last_mv[0][i][0],
853 s->f_code);
854 mpeg1_encode_motion(s,
855 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
856 s->f_code);
857 s->last_mv[0][i][0] = s->mv[0][i][0];
858 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
859 }
860 s->mv_bits += get_bits_diff(s);
861 }
862 if (cbp) {
863 if (s->chroma_y_shift) {
864 put_bits(&s->pb,
865 ff_mpeg12_mbPatTable[cbp][1],
866 ff_mpeg12_mbPatTable[cbp][0]);
867 } else {
868 put_bits(&s->pb,
869 ff_mpeg12_mbPatTable[cbp >> 2][1],
870 ff_mpeg12_mbPatTable[cbp >> 2][0]);
871 put_sbits(&s->pb, 2, cbp);
872 }
873 }
874 s->f_count++;
875 } else {
876 if (s->mv_type == MV_TYPE_16X16) {
877 if (cbp) { // With coded bloc pattern
878 if (s->dquant) {
879 if (s->mv_dir == MV_DIR_FORWARD)
880 put_mb_modes(s, 6, 3, 1, 0);
881 else
882 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
883 put_qscale(s);
884 } else {
885 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
886 }
887 } else { // No coded bloc pattern
888 put_bits(&s->pb, 5 - s->mv_dir, 2);
889 if (!s->frame_pred_frame_dct)
890 put_bits(&s->pb, 2, 2); /* motion_type: frame */
891 s->qscale -= s->dquant;
892 }
893 s->misc_bits += get_bits_diff(s);
894 if (s->mv_dir & MV_DIR_FORWARD) {
895 mpeg1_encode_motion(s,
896 s->mv[0][0][0] - s->last_mv[0][0][0],
897 s->f_code);
898 mpeg1_encode_motion(s,
899 s->mv[0][0][1] - s->last_mv[0][0][1],
900 s->f_code);
901 s->last_mv[0][0][0] =
902 s->last_mv[0][1][0] = s->mv[0][0][0];
903 s->last_mv[0][0][1] =
904 s->last_mv[0][1][1] = s->mv[0][0][1];
905 s->f_count++;
906 }
907 if (s->mv_dir & MV_DIR_BACKWARD) {
908 mpeg1_encode_motion(s,
909 s->mv[1][0][0] - s->last_mv[1][0][0],
910 s->b_code);
911 mpeg1_encode_motion(s,
912 s->mv[1][0][1] - s->last_mv[1][0][1],
913 s->b_code);
914 s->last_mv[1][0][0] =
915 s->last_mv[1][1][0] = s->mv[1][0][0];
916 s->last_mv[1][0][1] =
917 s->last_mv[1][1][1] = s->mv[1][0][1];
918 s->b_count++;
919 }
920 } else {
921 av_assert2(s->mv_type == MV_TYPE_FIELD);
922 av_assert2(!s->frame_pred_frame_dct);
923 if (cbp) { // With coded bloc pattern
924 if (s->dquant) {
925 if (s->mv_dir == MV_DIR_FORWARD)
926 put_mb_modes(s, 6, 3, 1, 1);
927 else
928 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
929 put_qscale(s);
930 } else {
931 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
932 }
933 } else { // No coded bloc pattern
934 put_bits(&s->pb, 5 - s->mv_dir, 2);
935 put_bits(&s->pb, 2, 1); /* motion_type: field */
936 s->qscale -= s->dquant;
937 }
938 s->misc_bits += get_bits_diff(s);
939 if (s->mv_dir & MV_DIR_FORWARD) {
940 for (i = 0; i < 2; i++) {
941 put_bits(&s->pb, 1, s->field_select[0][i]);
942 mpeg1_encode_motion(s,
943 s->mv[0][i][0] - s->last_mv[0][i][0],
944 s->f_code);
945 mpeg1_encode_motion(s,
946 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
947 s->f_code);
948 s->last_mv[0][i][0] = s->mv[0][i][0];
949 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
950 }
951 s->f_count++;
952 }
953 if (s->mv_dir & MV_DIR_BACKWARD) {
954 for (i = 0; i < 2; i++) {
955 put_bits(&s->pb, 1, s->field_select[1][i]);
956 mpeg1_encode_motion(s,
957 s->mv[1][i][0] - s->last_mv[1][i][0],
958 s->b_code);
959 mpeg1_encode_motion(s,
960 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
961 s->b_code);
962 s->last_mv[1][i][0] = s->mv[1][i][0];
963 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
964 }
965 s->b_count++;
966 }
967 }
968 s->mv_bits += get_bits_diff(s);
969 if (cbp) {
970 if (s->chroma_y_shift) {
971 put_bits(&s->pb,
972 ff_mpeg12_mbPatTable[cbp][1],
973 ff_mpeg12_mbPatTable[cbp][0]);
974 } else {
975 put_bits(&s->pb,
976 ff_mpeg12_mbPatTable[cbp >> 2][1],
977 ff_mpeg12_mbPatTable[cbp >> 2][0]);
978 put_sbits(&s->pb, 2, cbp);
979 }
980 }
981 }
982 for (i = 0; i < mb_block_count; i++)
983 if (cbp & (1 << (mb_block_count - 1 - i)))
984 mpeg1_encode_block(s, block[i], i);
985 s->mb_skip_run = 0;
986 if (s->mb_intra)
987 s->i_tex_bits += get_bits_diff(s);
988 else
989 s->p_tex_bits += get_bits_diff(s);
990 }
991}
992
993void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
994 int motion_x, int motion_y)
995{
996 if (s->chroma_format == CHROMA_420)
997 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
998 else
999 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1000}
1001
1002av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1003{
1004 static int done = 0;
1005
1006 ff_mpeg12_common_init(s);
1007
1008 if (!done) {
1009 int f_code;
1010 int mv;
1011 int i;
1012
1013 done = 1;
1014 ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1015 ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1016
1017 for (i = 0; i < 64; i++) {
1018 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1019 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1020 }
1021
1022 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1023 if (s->intra_vlc_format)
1024 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1025
1026 /* build unified dc encoding tables */
1027 for (i = -255; i < 256; i++) {
1028 int adiff, index;
1029 int bits, code;
1030 int diff = i;
1031
1032 adiff = FFABS(diff);
1033 if (diff < 0)
1034 diff--;
1035 index = av_log2(2 * adiff);
1036
1037 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1038 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1039 av_mod_uintp2(diff, index);
1040 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1041
1042 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1043 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1044 av_mod_uintp2(diff, index);
1045 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1046 }
1047
1048 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1049 for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1050 int len;
1051
1052 if (mv == 0) {
1053 len = ff_mpeg12_mbMotionVectorTable[0][1];
1054 } else {
1055 int val, bit_size, code;
1056
1057 bit_size = f_code - 1;
1058
1059 val = mv;
1060 if (val < 0)
1061 val = -val;
1062 val--;
1063 code = (val >> bit_size) + 1;
1064 if (code < 17)
1065 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1066 1 + bit_size;
1067 else
1068 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1069 2 + bit_size;
1070 }
1071
1072 mv_penalty[f_code][mv + MAX_DMV] = len;
1073 }
1074
1075
1076 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1077 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1078 fcode_tab[mv + MAX_MV] = f_code;
1079 }
1080 s->me.mv_penalty = mv_penalty;
1081 s->fcode_tab = fcode_tab;
1082 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1083 s->min_qcoeff = -255;
1084 s->max_qcoeff = 255;
1085 } else {
1086 s->min_qcoeff = -2047;
1087 s->max_qcoeff = 2047;
1088 }
1089 if (s->intra_vlc_format) {
1090 s->intra_ac_vlc_length =
1091 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1092 } else {
1093 s->intra_ac_vlc_length =
1094 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1095 }
1096 s->inter_ac_vlc_length =
1097 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1098}
1099
1100#define OFFSET(x) offsetof(MpegEncContext, x)
1101#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1102#define COMMON_OPTS \
1103 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1104 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1105 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1106 OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1107 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1108 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1109 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1110 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1111 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1112 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1113
1114static const AVOption mpeg1_options[] = {
1115 COMMON_OPTS
1116 FF_MPV_COMMON_OPTS
1117 { NULL },
1118};
1119
1120static const AVOption mpeg2_options[] = {
1121 COMMON_OPTS
1122 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1123 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1124 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1125 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1126 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1127 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1128 FF_MPV_COMMON_OPTS
1129 { NULL },
1130};
1131
1132#define mpeg12_class(x) \
1133static const AVClass mpeg ## x ## _class = { \
1134 .class_name = "mpeg" # x "video encoder", \
1135 .item_name = av_default_item_name, \
1136 .option = mpeg ## x ## _options, \
1137 .version = LIBAVUTIL_VERSION_INT, \
1138};
1139
1140mpeg12_class(1)
1141mpeg12_class(2)
1142
1143AVCodec ff_mpeg1video_encoder = {
1144 .name = "mpeg1video",
1145 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1146 .type = AVMEDIA_TYPE_VIDEO,
1147 .id = AV_CODEC_ID_MPEG1VIDEO,
1148 .priv_data_size = sizeof(MpegEncContext),
1149 .init = encode_init,
1150 .encode2 = ff_mpv_encode_picture,
1151 .close = ff_mpv_encode_end,
1152 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1153 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1154 AV_PIX_FMT_NONE },
1155 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1156 .priv_class = &mpeg1_class,
1157};
1158
1159AVCodec ff_mpeg2video_encoder = {
1160 .name = "mpeg2video",
1161 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1162 .type = AVMEDIA_TYPE_VIDEO,
1163 .id = AV_CODEC_ID_MPEG2VIDEO,
1164 .priv_data_size = sizeof(MpegEncContext),
1165 .init = encode_init,
1166 .encode2 = ff_mpv_encode_picture,
1167 .close = ff_mpv_encode_end,
1168 .supported_framerates = ff_mpeg2_frame_rate_tab,
1169 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1170 AV_PIX_FMT_YUV422P,
1171 AV_PIX_FMT_NONE },
1172 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1173 .priv_class = &mpeg2_class,
1174};
1175
generated by cgit at 2024-05-17 04:14:09 (GMT)