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 "config.h"
31 #include "libavutil/attributes.h"
32 #include "libavutil/avassert.h"
33 #include "libavutil/log.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/thread.h"
36 #include "libavutil/timecode.h"
37 #include "libavutil/stereo3d.h"
38
39 #include "avcodec.h"
40 #include "bytestream.h"
41 #include "mathops.h"
42 #include "mpeg12.h"
43 #include "mpeg12data.h"
44 #include "mpegutils.h"
45 #include "mpegvideo.h"
46 #include "profiles.h"
47
48 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
49 static const uint8_t svcd_scan_offset_placeholder[] = {
50 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
51 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
52 };
53
54 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
55 static uint8_t fcode_tab[MAX_MV * 2 + 1];
56
57 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
58 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
59
60 /* simple include everything table for dc, first byte is bits
61 * number next 3 are code */
62 static uint32_t mpeg1_lum_dc_uni[512];
63 static uint32_t mpeg1_chr_dc_uni[512];
64
65 #define A53_MAX_CC_COUNT 0x1f
66 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
67
ff_mpeg1_init_uni_ac_vlc(const RLTable * rl,uint8_t * uni_ac_vlc_len)68 av_cold void ff_mpeg1_init_uni_ac_vlc(const RLTable *rl, uint8_t *uni_ac_vlc_len)
69 {
70 int i;
71
72 for (i = 0; i < 128; i++) {
73 int level = i - 64;
74 int run;
75 if (!level)
76 continue;
77 for (run = 0; run < 64; run++) {
78 int len, code;
79 int alevel = FFABS(level);
80
81 if (alevel > rl->max_level[0][run])
82 code = 111; /* rl->n */
83 else
84 code = rl->index_run[0][run] + alevel - 1;
85
86 if (code < 111) { /* rl->n */
87 /* length of VLC and sign */
88 len = rl->table_vlc[code][1] + 1;
89 } else {
90 len = rl->table_vlc[111 /* rl->n */][1] + 6;
91
92 if (alevel < 128)
93 len += 8;
94 else
95 len += 16;
96 }
97
98 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
99 }
100 }
101 }
102
103 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
find_frame_rate_index(MpegEncContext * s)104 static int find_frame_rate_index(MpegEncContext *s)
105 {
106 int i;
107 AVRational bestq = (AVRational) {0, 0};
108 AVRational ext;
109 AVRational target = av_inv_q(s->avctx->time_base);
110
111 for (i = 1; i < 14; i++) {
112 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
113 i >= 9)
114 break;
115
116 for (ext.num=1; ext.num <= 4; ext.num++) {
117 for (ext.den=1; ext.den <= 32; ext.den++) {
118 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
119
120 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
121 continue;
122 if (av_gcd(ext.den, ext.num) != 1)
123 continue;
124
125 if ( bestq.num==0
126 || av_nearer_q(target, bestq, q) < 0
127 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
128 bestq = q;
129 s->frame_rate_index = i;
130 s->mpeg2_frame_rate_ext.num = ext.num;
131 s->mpeg2_frame_rate_ext.den = ext.den;
132 }
133 }
134 }
135 }
136
137 if (av_cmp_q(target, bestq))
138 return -1;
139 else
140 return 0;
141 }
142
encode_init(AVCodecContext * avctx)143 static av_cold int encode_init(AVCodecContext *avctx)
144 {
145 int ret;
146 MpegEncContext *s = avctx->priv_data;
147
148 if ((ret = ff_mpv_encode_init(avctx)) < 0)
149 return ret;
150
151 if (find_frame_rate_index(s) < 0) {
152 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
153 av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
154 avctx->time_base.den, avctx->time_base.num);
155 return AVERROR(EINVAL);
156 } else {
157 av_log(avctx, AV_LOG_INFO,
158 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
159 avctx->time_base.den, avctx->time_base.num);
160 }
161 }
162
163 if (avctx->profile == FF_PROFILE_UNKNOWN) {
164 if (avctx->level != FF_LEVEL_UNKNOWN) {
165 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
166 return AVERROR(EINVAL);
167 }
168 /* Main or 4:2:2 */
169 avctx->profile = s->chroma_format == CHROMA_420 ? FF_PROFILE_MPEG2_MAIN : FF_PROFILE_MPEG2_422;
170 }
171
172 if (avctx->level == FF_LEVEL_UNKNOWN) {
173 if (avctx->profile == FF_PROFILE_MPEG2_422) { /* 4:2:2 */
174 if (avctx->width <= 720 && avctx->height <= 608)
175 avctx->level = 5; /* Main */
176 else
177 avctx->level = 2; /* High */
178 } else {
179 if (avctx->profile != FF_PROFILE_MPEG2_HIGH && s->chroma_format != CHROMA_420) {
180 av_log(avctx, AV_LOG_ERROR,
181 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
182 return AVERROR(EINVAL);
183 }
184 if (avctx->width <= 720 && avctx->height <= 576)
185 avctx->level = 8; /* Main */
186 else if (avctx->width <= 1440)
187 avctx->level = 6; /* High 1440 */
188 else
189 avctx->level = 4; /* High */
190 }
191 }
192
193 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
194 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
195 return AVERROR(EINVAL);
196 }
197
198 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
199 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
200 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
201 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
202 return AVERROR(EINVAL);
203 }
204 }
205
206 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
207 if (s->drop_frame_timecode)
208 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
209 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
210 av_log(avctx, AV_LOG_ERROR,
211 "Drop frame time code only allowed with 1001/30000 fps\n");
212 return AVERROR(EINVAL);
213 }
214
215 #if FF_API_PRIVATE_OPT
216 FF_DISABLE_DEPRECATION_WARNINGS
217 if (avctx->timecode_frame_start)
218 s->timecode_frame_start = avctx->timecode_frame_start;
219 FF_ENABLE_DEPRECATION_WARNINGS
220 #endif
221
222 if (s->tc_opt_str) {
223 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
224 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
225 if (ret < 0)
226 return ret;
227 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
228 s->timecode_frame_start = s->tc.start;
229 } else {
230 s->timecode_frame_start = 0; // default is -1
231 }
232
233 return 0;
234 }
235
put_header(MpegEncContext * s,int header)236 static void put_header(MpegEncContext *s, int header)
237 {
238 align_put_bits(&s->pb);
239 put_bits(&s->pb, 16, header >> 16);
240 put_sbits(&s->pb, 16, header);
241 }
242
243 /* put sequence header if needed */
mpeg1_encode_sequence_header(MpegEncContext * s)244 static void mpeg1_encode_sequence_header(MpegEncContext *s)
245 {
246 unsigned int vbv_buffer_size, fps, v;
247 int i, constraint_parameter_flag;
248 uint64_t time_code;
249 int64_t best_aspect_error = INT64_MAX;
250 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
251
252 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
253 aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
254
255 if (s->current_picture.f->key_frame) {
256 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
257
258 /* MPEG-1 header repeated every GOP */
259 put_header(s, SEQ_START_CODE);
260
261 put_sbits(&s->pb, 12, s->width & 0xFFF);
262 put_sbits(&s->pb, 12, s->height & 0xFFF);
263
264 for (i = 1; i < 15; i++) {
265 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
266 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
267 error -= (1LL<<32) / ff_mpeg1_aspect[i];
268 else
269 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
270
271 error = FFABS(error);
272
273 if (error - 2 <= best_aspect_error) {
274 best_aspect_error = error;
275 s->aspect_ratio_info = i;
276 }
277 }
278
279 put_bits(&s->pb, 4, s->aspect_ratio_info);
280 put_bits(&s->pb, 4, s->frame_rate_index);
281
282 if (s->avctx->rc_max_rate) {
283 v = (s->avctx->rc_max_rate + 399) / 400;
284 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
285 v = 0x3ffff;
286 } else {
287 v = 0x3FFFF;
288 }
289
290 if (s->avctx->rc_buffer_size)
291 vbv_buffer_size = s->avctx->rc_buffer_size;
292 else
293 /* VBV calculation: Scaled so that a VCD has the proper
294 * VBV size of 40 kilobytes */
295 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
296 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
297
298 put_sbits(&s->pb, 18, v);
299 put_bits(&s->pb, 1, 1); // marker
300 put_sbits(&s->pb, 10, vbv_buffer_size);
301
302 constraint_parameter_flag =
303 s->width <= 768 &&
304 s->height <= 576 &&
305 s->mb_width * s->mb_height <= 396 &&
306 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
307 framerate.num <= framerate.den * 30 &&
308 s->avctx->me_range &&
309 s->avctx->me_range < 128 &&
310 vbv_buffer_size <= 20 &&
311 v <= 1856000 / 400 &&
312 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
313
314 put_bits(&s->pb, 1, constraint_parameter_flag);
315
316 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
317 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
318
319 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
320 AVFrameSideData *side_data;
321 int width = s->width;
322 int height = s->height;
323 int use_seq_disp_ext;
324
325 put_header(s, EXT_START_CODE);
326 put_bits(&s->pb, 4, 1); // seq ext
327
328 put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
329
330 put_bits(&s->pb, 3, s->avctx->profile); // profile
331 put_bits(&s->pb, 4, s->avctx->level); // level
332
333 put_bits(&s->pb, 1, s->progressive_sequence);
334 put_bits(&s->pb, 2, s->chroma_format);
335 put_bits(&s->pb, 2, s->width >> 12);
336 put_bits(&s->pb, 2, s->height >> 12);
337 put_bits(&s->pb, 12, v >> 18); // bitrate ext
338 put_bits(&s->pb, 1, 1); // marker
339 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
340 put_bits(&s->pb, 1, s->low_delay);
341 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
342 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
343
344 side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
345 if (side_data) {
346 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
347 if (pan_scan->width && pan_scan->height) {
348 width = pan_scan->width >> 4;
349 height = pan_scan->height >> 4;
350 }
351 }
352
353 use_seq_disp_ext = (width != s->width ||
354 height != s->height ||
355 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
356 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
357 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
358 s->video_format != VIDEO_FORMAT_UNSPECIFIED);
359
360 if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
361 put_header(s, EXT_START_CODE);
362 put_bits(&s->pb, 4, 2); // sequence display extension
363 put_bits(&s->pb, 3, s->video_format); // video_format
364 put_bits(&s->pb, 1, 1); // colour_description
365 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
366 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
367 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
368 put_bits(&s->pb, 14, width); // display_horizontal_size
369 put_bits(&s->pb, 1, 1); // marker_bit
370 put_bits(&s->pb, 14, height); // display_vertical_size
371 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
372 }
373 }
374
375 put_header(s, GOP_START_CODE);
376 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
377 /* time code: we must convert from the real frame rate to a
378 * fake MPEG frame rate in case of low frame rate */
379 fps = (framerate.num + framerate.den / 2) / framerate.den;
380 time_code = s->current_picture_ptr->f->coded_picture_number +
381 s->timecode_frame_start;
382
383 s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
384
385 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
386 if (s->drop_frame_timecode)
387 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
388
389 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
390 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
391 put_bits(&s->pb, 1, 1);
392 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
393 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
394 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
395 put_bits(&s->pb, 1, 0); // broken link
396 }
397 }
398
encode_mb_skip_run(MpegEncContext * s,int run)399 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
400 {
401 while (run >= 33) {
402 put_bits(&s->pb, 11, 0x008);
403 run -= 33;
404 }
405 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
406 ff_mpeg12_mbAddrIncrTable[run][0]);
407 }
408
put_qscale(MpegEncContext * s)409 static av_always_inline void put_qscale(MpegEncContext *s)
410 {
411 put_bits(&s->pb, 5, s->qscale);
412 }
413
ff_mpeg1_encode_slice_header(MpegEncContext * s)414 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
415 {
416 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
417 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
418 /* slice_vertical_position_extension */
419 put_bits(&s->pb, 3, s->mb_y >> 7);
420 } else {
421 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
422 }
423 put_qscale(s);
424 /* slice extra information */
425 put_bits(&s->pb, 1, 0);
426 }
427
ff_mpeg1_encode_picture_header(MpegEncContext * s,int picture_number)428 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
429 {
430 AVFrameSideData *side_data;
431 mpeg1_encode_sequence_header(s);
432
433 /* MPEG-1 picture header */
434 put_header(s, PICTURE_START_CODE);
435 /* temporal reference */
436
437 // RAL: s->picture_number instead of s->fake_picture_number
438 put_bits(&s->pb, 10,
439 (s->picture_number - s->gop_picture_number) & 0x3ff);
440 put_bits(&s->pb, 3, s->pict_type);
441
442 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
443 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
444
445 // RAL: Forward f_code also needed for B-frames
446 if (s->pict_type == AV_PICTURE_TYPE_P ||
447 s->pict_type == AV_PICTURE_TYPE_B) {
448 put_bits(&s->pb, 1, 0); /* half pel coordinates */
449 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
450 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
451 else
452 put_bits(&s->pb, 3, 7); /* forward_f_code */
453 }
454
455 // RAL: Backward f_code necessary for B-frames
456 if (s->pict_type == AV_PICTURE_TYPE_B) {
457 put_bits(&s->pb, 1, 0); /* half pel coordinates */
458 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
459 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
460 else
461 put_bits(&s->pb, 3, 7); /* backward_f_code */
462 }
463
464 put_bits(&s->pb, 1, 0); /* extra bit picture */
465
466 s->frame_pred_frame_dct = 1;
467 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
468 put_header(s, EXT_START_CODE);
469 put_bits(&s->pb, 4, 8); /* pic ext */
470 if (s->pict_type == AV_PICTURE_TYPE_P ||
471 s->pict_type == AV_PICTURE_TYPE_B) {
472 put_bits(&s->pb, 4, s->f_code);
473 put_bits(&s->pb, 4, s->f_code);
474 } else {
475 put_bits(&s->pb, 8, 255);
476 }
477 if (s->pict_type == AV_PICTURE_TYPE_B) {
478 put_bits(&s->pb, 4, s->b_code);
479 put_bits(&s->pb, 4, s->b_code);
480 } else {
481 put_bits(&s->pb, 8, 255);
482 }
483 put_bits(&s->pb, 2, s->intra_dc_precision);
484
485 av_assert0(s->picture_structure == PICT_FRAME);
486 put_bits(&s->pb, 2, s->picture_structure);
487 if (s->progressive_sequence)
488 put_bits(&s->pb, 1, 0); /* no repeat */
489 else
490 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
491 /* XXX: optimize the generation of this flag with entropy measures */
492 s->frame_pred_frame_dct = s->progressive_sequence;
493
494 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
495 put_bits(&s->pb, 1, s->concealment_motion_vectors);
496 put_bits(&s->pb, 1, s->q_scale_type);
497 put_bits(&s->pb, 1, s->intra_vlc_format);
498 put_bits(&s->pb, 1, s->alternate_scan);
499 put_bits(&s->pb, 1, s->repeat_first_field);
500 s->progressive_frame = s->progressive_sequence;
501 /* chroma_420_type */
502 put_bits(&s->pb, 1, s->chroma_format ==
503 CHROMA_420 ? s->progressive_frame : 0);
504 put_bits(&s->pb, 1, s->progressive_frame);
505 put_bits(&s->pb, 1, 0); /* composite_display_flag */
506 }
507 if (s->scan_offset) {
508 int i;
509
510 put_header(s, USER_START_CODE);
511 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
512 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
513 }
514 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
515 AV_FRAME_DATA_STEREO3D);
516 if (side_data) {
517 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
518 uint8_t fpa_type;
519
520 switch (stereo->type) {
521 case AV_STEREO3D_SIDEBYSIDE:
522 fpa_type = 0x03;
523 break;
524 case AV_STEREO3D_TOPBOTTOM:
525 fpa_type = 0x04;
526 break;
527 case AV_STEREO3D_2D:
528 fpa_type = 0x08;
529 break;
530 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
531 fpa_type = 0x23;
532 break;
533 default:
534 fpa_type = 0;
535 break;
536 }
537
538 if (fpa_type != 0) {
539 put_header(s, USER_START_CODE);
540 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
541 put_bits(&s->pb, 8, 'P');
542 put_bits(&s->pb, 8, '3');
543 put_bits(&s->pb, 8, 'D');
544 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
545
546 put_bits(&s->pb, 1, 1); // reserved_bit
547 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
548 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
549 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
550 }
551 }
552
553 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->a53_cc) {
554 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
555 AV_FRAME_DATA_A53_CC);
556 if (side_data) {
557 if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
558 int i = 0;
559
560 put_header (s, USER_START_CODE);
561
562 put_bits(&s->pb, 8, 'G'); // user_identifier
563 put_bits(&s->pb, 8, 'A');
564 put_bits(&s->pb, 8, '9');
565 put_bits(&s->pb, 8, '4');
566 put_bits(&s->pb, 8, 3); // user_data_type_code
567 put_bits(&s->pb, 8,
568 (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
569 put_bits(&s->pb, 8, 0xff); // em_data
570
571 for (i = 0; i < side_data->size; i++)
572 put_bits(&s->pb, 8, side_data->data[i]);
573
574 put_bits(&s->pb, 8, 0xff); // marker_bits
575 } else {
576 av_log(s->avctx, AV_LOG_WARNING,
577 "Warning Closed Caption size (%d) can not exceed 93 bytes "
578 "and must be a multiple of 3\n", side_data->size);
579 }
580 }
581 }
582
583 s->mb_y = 0;
584 ff_mpeg1_encode_slice_header(s);
585 }
586
put_mb_modes(MpegEncContext * s,int n,int bits,int has_mv,int field_motion)587 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
588 int has_mv, int field_motion)
589 {
590 put_bits(&s->pb, n, bits);
591 if (!s->frame_pred_frame_dct) {
592 if (has_mv)
593 /* motion_type: frame/field */
594 put_bits(&s->pb, 2, 2 - field_motion);
595 put_bits(&s->pb, 1, s->interlaced_dct);
596 }
597 }
598
599 // RAL: Parameter added: f_or_b_code
mpeg1_encode_motion(MpegEncContext * s,int val,int f_or_b_code)600 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
601 {
602 if (val == 0) {
603 /* zero vector */
604 put_bits(&s->pb,
605 ff_mpeg12_mbMotionVectorTable[0][1],
606 ff_mpeg12_mbMotionVectorTable[0][0]);
607 } else {
608 int code, sign, bits;
609 int bit_size = f_or_b_code - 1;
610 int range = 1 << bit_size;
611 /* modulo encoding */
612 val = sign_extend(val, 5 + bit_size);
613
614 if (val >= 0) {
615 val--;
616 code = (val >> bit_size) + 1;
617 bits = val & (range - 1);
618 sign = 0;
619 } else {
620 val = -val;
621 val--;
622 code = (val >> bit_size) + 1;
623 bits = val & (range - 1);
624 sign = 1;
625 }
626
627 av_assert2(code > 0 && code <= 16);
628
629 put_bits(&s->pb,
630 ff_mpeg12_mbMotionVectorTable[code][1],
631 ff_mpeg12_mbMotionVectorTable[code][0]);
632
633 put_bits(&s->pb, 1, sign);
634 if (bit_size > 0)
635 put_bits(&s->pb, bit_size, bits);
636 }
637 }
638
encode_dc(MpegEncContext * s,int diff,int component)639 static inline void encode_dc(MpegEncContext *s, int diff, int component)
640 {
641 unsigned int diff_u = diff + 255;
642 if (diff_u >= 511) {
643 int index;
644
645 if (diff < 0) {
646 index = av_log2_16bit(-2 * diff);
647 diff--;
648 } else {
649 index = av_log2_16bit(2 * diff);
650 }
651 if (component == 0)
652 put_bits(&s->pb,
653 ff_mpeg12_vlc_dc_lum_bits[index] + index,
654 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
655 av_mod_uintp2(diff, index));
656 else
657 put_bits(&s->pb,
658 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
659 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
660 av_mod_uintp2(diff, index));
661 } else {
662 if (component == 0)
663 put_bits(&s->pb,
664 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
665 mpeg1_lum_dc_uni[diff + 255] >> 8);
666 else
667 put_bits(&s->pb,
668 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
669 mpeg1_chr_dc_uni[diff + 255] >> 8);
670 }
671 }
672
mpeg1_encode_block(MpegEncContext * s,int16_t * block,int n)673 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
674 {
675 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
676 int code, component;
677 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
678
679 last_index = s->block_last_index[n];
680
681 /* DC coef */
682 if (s->mb_intra) {
683 component = (n <= 3 ? 0 : (n & 1) + 1);
684 dc = block[0]; /* overflow is impossible */
685 diff = dc - s->last_dc[component];
686 encode_dc(s, diff, component);
687 s->last_dc[component] = dc;
688 i = 1;
689 if (s->intra_vlc_format)
690 table_vlc = ff_rl_mpeg2.table_vlc;
691 } else {
692 /* encode the first coefficient: needs to be done here because
693 * it is handled slightly differently */
694 level = block[0];
695 if (abs(level) == 1) {
696 code = ((uint32_t)level >> 31); /* the sign bit */
697 put_bits(&s->pb, 2, code | 0x02);
698 i = 1;
699 } else {
700 i = 0;
701 last_non_zero = -1;
702 goto next_coef;
703 }
704 }
705
706 /* now quantify & encode AC coefs */
707 last_non_zero = i - 1;
708
709 for (; i <= last_index; i++) {
710 j = s->intra_scantable.permutated[i];
711 level = block[j];
712
713 next_coef:
714 /* encode using VLC */
715 if (level != 0) {
716 run = i - last_non_zero - 1;
717
718 alevel = level;
719 MASK_ABS(sign, alevel);
720 sign &= 1;
721
722 if (alevel <= ff_rl_mpeg1.max_level[0][run]) {
723 code = ff_rl_mpeg1.index_run[0][run] + alevel - 1;
724 /* store the VLC & sign at once */
725 put_bits(&s->pb, table_vlc[code][1] + 1,
726 (table_vlc[code][0] << 1) + sign);
727 } else {
728 /* escape seems to be pretty rare <5% so I do not optimize it */
729 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
730 /* escape: only clip in this case */
731 put_bits(&s->pb, 6, run);
732 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
733 if (alevel < 128) {
734 put_sbits(&s->pb, 8, level);
735 } else {
736 if (level < 0)
737 put_bits(&s->pb, 16, 0x8001 + level + 255);
738 else
739 put_sbits(&s->pb, 16, level);
740 }
741 } else {
742 put_sbits(&s->pb, 12, level);
743 }
744 }
745 last_non_zero = i;
746 }
747 }
748 /* end of block */
749 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
750 }
751
mpeg1_encode_mb_internal(MpegEncContext * s,int16_t block[8][64],int motion_x,int motion_y,int mb_block_count)752 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
753 int16_t block[8][64],
754 int motion_x, int motion_y,
755 int mb_block_count)
756 {
757 int i, cbp;
758 const int mb_x = s->mb_x;
759 const int mb_y = s->mb_y;
760 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
761
762 /* compute cbp */
763 cbp = 0;
764 for (i = 0; i < mb_block_count; i++)
765 if (s->block_last_index[i] >= 0)
766 cbp |= 1 << (mb_block_count - 1 - i);
767
768 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
769 (mb_x != s->mb_width - 1 ||
770 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
771 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
772 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
773 (((s->mv_dir & MV_DIR_FORWARD)
774 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
775 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
776 ((s->mv_dir & MV_DIR_BACKWARD)
777 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
778 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
779 s->mb_skip_run++;
780 s->qscale -= s->dquant;
781 s->skip_count++;
782 s->misc_bits++;
783 s->last_bits++;
784 if (s->pict_type == AV_PICTURE_TYPE_P) {
785 s->last_mv[0][0][0] =
786 s->last_mv[0][0][1] =
787 s->last_mv[0][1][0] =
788 s->last_mv[0][1][1] = 0;
789 }
790 } else {
791 if (first_mb) {
792 av_assert0(s->mb_skip_run == 0);
793 encode_mb_skip_run(s, s->mb_x);
794 } else {
795 encode_mb_skip_run(s, s->mb_skip_run);
796 }
797
798 if (s->pict_type == AV_PICTURE_TYPE_I) {
799 if (s->dquant && cbp) {
800 /* macroblock_type: macroblock_quant = 1 */
801 put_mb_modes(s, 2, 1, 0, 0);
802 put_qscale(s);
803 } else {
804 /* macroblock_type: macroblock_quant = 0 */
805 put_mb_modes(s, 1, 1, 0, 0);
806 s->qscale -= s->dquant;
807 }
808 s->misc_bits += get_bits_diff(s);
809 s->i_count++;
810 } else if (s->mb_intra) {
811 if (s->dquant && cbp) {
812 put_mb_modes(s, 6, 0x01, 0, 0);
813 put_qscale(s);
814 } else {
815 put_mb_modes(s, 5, 0x03, 0, 0);
816 s->qscale -= s->dquant;
817 }
818 s->misc_bits += get_bits_diff(s);
819 s->i_count++;
820 memset(s->last_mv, 0, sizeof(s->last_mv));
821 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
822 if (s->mv_type == MV_TYPE_16X16) {
823 if (cbp != 0) {
824 if ((motion_x | motion_y) == 0) {
825 if (s->dquant) {
826 /* macroblock_pattern & quant */
827 put_mb_modes(s, 5, 1, 0, 0);
828 put_qscale(s);
829 } else {
830 /* macroblock_pattern only */
831 put_mb_modes(s, 2, 1, 0, 0);
832 }
833 s->misc_bits += get_bits_diff(s);
834 } else {
835 if (s->dquant) {
836 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
837 put_qscale(s);
838 } else {
839 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
840 }
841 s->misc_bits += get_bits_diff(s);
842 // RAL: f_code parameter added
843 mpeg1_encode_motion(s,
844 motion_x - s->last_mv[0][0][0],
845 s->f_code);
846 // RAL: f_code parameter added
847 mpeg1_encode_motion(s,
848 motion_y - s->last_mv[0][0][1],
849 s->f_code);
850 s->mv_bits += get_bits_diff(s);
851 }
852 } else {
853 put_bits(&s->pb, 3, 1); /* motion only */
854 if (!s->frame_pred_frame_dct)
855 put_bits(&s->pb, 2, 2); /* motion_type: frame */
856 s->misc_bits += get_bits_diff(s);
857 // RAL: f_code parameter added
858 mpeg1_encode_motion(s,
859 motion_x - s->last_mv[0][0][0],
860 s->f_code);
861 // RAL: f_code parameter added
862 mpeg1_encode_motion(s,
863 motion_y - s->last_mv[0][0][1],
864 s->f_code);
865 s->qscale -= s->dquant;
866 s->mv_bits += get_bits_diff(s);
867 }
868 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
869 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
870 } else {
871 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
872
873 if (cbp) {
874 if (s->dquant) {
875 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
876 put_qscale(s);
877 } else {
878 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
879 }
880 } else {
881 put_bits(&s->pb, 3, 1); /* motion only */
882 put_bits(&s->pb, 2, 1); /* motion_type: field */
883 s->qscale -= s->dquant;
884 }
885 s->misc_bits += get_bits_diff(s);
886 for (i = 0; i < 2; i++) {
887 put_bits(&s->pb, 1, s->field_select[0][i]);
888 mpeg1_encode_motion(s,
889 s->mv[0][i][0] - s->last_mv[0][i][0],
890 s->f_code);
891 mpeg1_encode_motion(s,
892 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
893 s->f_code);
894 s->last_mv[0][i][0] = s->mv[0][i][0];
895 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
896 }
897 s->mv_bits += get_bits_diff(s);
898 }
899 if (cbp) {
900 if (s->chroma_y_shift) {
901 put_bits(&s->pb,
902 ff_mpeg12_mbPatTable[cbp][1],
903 ff_mpeg12_mbPatTable[cbp][0]);
904 } else {
905 put_bits(&s->pb,
906 ff_mpeg12_mbPatTable[cbp >> 2][1],
907 ff_mpeg12_mbPatTable[cbp >> 2][0]);
908 put_sbits(&s->pb, 2, cbp);
909 }
910 }
911 s->f_count++;
912 } else {
913 if (s->mv_type == MV_TYPE_16X16) {
914 if (cbp) { // With coded bloc pattern
915 if (s->dquant) {
916 if (s->mv_dir == MV_DIR_FORWARD)
917 put_mb_modes(s, 6, 3, 1, 0);
918 else
919 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
920 put_qscale(s);
921 } else {
922 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
923 }
924 } else { // No coded bloc pattern
925 put_bits(&s->pb, 5 - s->mv_dir, 2);
926 if (!s->frame_pred_frame_dct)
927 put_bits(&s->pb, 2, 2); /* motion_type: frame */
928 s->qscale -= s->dquant;
929 }
930 s->misc_bits += get_bits_diff(s);
931 if (s->mv_dir & MV_DIR_FORWARD) {
932 mpeg1_encode_motion(s,
933 s->mv[0][0][0] - s->last_mv[0][0][0],
934 s->f_code);
935 mpeg1_encode_motion(s,
936 s->mv[0][0][1] - s->last_mv[0][0][1],
937 s->f_code);
938 s->last_mv[0][0][0] =
939 s->last_mv[0][1][0] = s->mv[0][0][0];
940 s->last_mv[0][0][1] =
941 s->last_mv[0][1][1] = s->mv[0][0][1];
942 s->f_count++;
943 }
944 if (s->mv_dir & MV_DIR_BACKWARD) {
945 mpeg1_encode_motion(s,
946 s->mv[1][0][0] - s->last_mv[1][0][0],
947 s->b_code);
948 mpeg1_encode_motion(s,
949 s->mv[1][0][1] - s->last_mv[1][0][1],
950 s->b_code);
951 s->last_mv[1][0][0] =
952 s->last_mv[1][1][0] = s->mv[1][0][0];
953 s->last_mv[1][0][1] =
954 s->last_mv[1][1][1] = s->mv[1][0][1];
955 s->b_count++;
956 }
957 } else {
958 av_assert2(s->mv_type == MV_TYPE_FIELD);
959 av_assert2(!s->frame_pred_frame_dct);
960 if (cbp) { // With coded bloc pattern
961 if (s->dquant) {
962 if (s->mv_dir == MV_DIR_FORWARD)
963 put_mb_modes(s, 6, 3, 1, 1);
964 else
965 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
966 put_qscale(s);
967 } else {
968 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
969 }
970 } else { // No coded bloc pattern
971 put_bits(&s->pb, 5 - s->mv_dir, 2);
972 put_bits(&s->pb, 2, 1); /* motion_type: field */
973 s->qscale -= s->dquant;
974 }
975 s->misc_bits += get_bits_diff(s);
976 if (s->mv_dir & MV_DIR_FORWARD) {
977 for (i = 0; i < 2; i++) {
978 put_bits(&s->pb, 1, s->field_select[0][i]);
979 mpeg1_encode_motion(s,
980 s->mv[0][i][0] - s->last_mv[0][i][0],
981 s->f_code);
982 mpeg1_encode_motion(s,
983 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
984 s->f_code);
985 s->last_mv[0][i][0] = s->mv[0][i][0];
986 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
987 }
988 s->f_count++;
989 }
990 if (s->mv_dir & MV_DIR_BACKWARD) {
991 for (i = 0; i < 2; i++) {
992 put_bits(&s->pb, 1, s->field_select[1][i]);
993 mpeg1_encode_motion(s,
994 s->mv[1][i][0] - s->last_mv[1][i][0],
995 s->b_code);
996 mpeg1_encode_motion(s,
997 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
998 s->b_code);
999 s->last_mv[1][i][0] = s->mv[1][i][0];
1000 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1001 }
1002 s->b_count++;
1003 }
1004 }
1005 s->mv_bits += get_bits_diff(s);
1006 if (cbp) {
1007 if (s->chroma_y_shift) {
1008 put_bits(&s->pb,
1009 ff_mpeg12_mbPatTable[cbp][1],
1010 ff_mpeg12_mbPatTable[cbp][0]);
1011 } else {
1012 put_bits(&s->pb,
1013 ff_mpeg12_mbPatTable[cbp >> 2][1],
1014 ff_mpeg12_mbPatTable[cbp >> 2][0]);
1015 put_sbits(&s->pb, 2, cbp);
1016 }
1017 }
1018 }
1019 for (i = 0; i < mb_block_count; i++)
1020 if (cbp & (1 << (mb_block_count - 1 - i)))
1021 mpeg1_encode_block(s, block[i], i);
1022 s->mb_skip_run = 0;
1023 if (s->mb_intra)
1024 s->i_tex_bits += get_bits_diff(s);
1025 else
1026 s->p_tex_bits += get_bits_diff(s);
1027 }
1028 }
1029
ff_mpeg1_encode_mb(MpegEncContext * s,int16_t block[8][64],int motion_x,int motion_y)1030 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1031 int motion_x, int motion_y)
1032 {
1033 if (s->chroma_format == CHROMA_420)
1034 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1035 else
1036 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1037 }
1038
mpeg12_encode_init_static(void)1039 static av_cold void mpeg12_encode_init_static(void)
1040 {
1041 static uint8_t mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
1042
1043 ff_rl_init(&ff_rl_mpeg1, mpeg12_static_rl_table_store[0]);
1044 ff_rl_init(&ff_rl_mpeg2, mpeg12_static_rl_table_store[1]);
1045
1046 ff_mpeg1_init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1047 ff_mpeg1_init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1048
1049 /* build unified dc encoding tables */
1050 for (int i = -255; i < 256; i++) {
1051 int adiff, index;
1052 int bits, code;
1053 int diff = i;
1054
1055 adiff = FFABS(diff);
1056 if (diff < 0)
1057 diff--;
1058 index = av_log2(2 * adiff);
1059
1060 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1061 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1062 av_mod_uintp2(diff, index);
1063 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1064
1065 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1066 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1067 av_mod_uintp2(diff, index);
1068 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1069 }
1070
1071 for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
1072 for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1073 int len;
1074
1075 if (mv == 0) {
1076 len = ff_mpeg12_mbMotionVectorTable[0][1];
1077 } else {
1078 int val, bit_size, code;
1079
1080 bit_size = f_code - 1;
1081
1082 val = mv;
1083 if (val < 0)
1084 val = -val;
1085 val--;
1086 code = (val >> bit_size) + 1;
1087 if (code < 17)
1088 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1089 1 + bit_size;
1090 else
1091 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1092 2 + bit_size;
1093 }
1094
1095 mv_penalty[f_code][mv + MAX_DMV] = len;
1096 }
1097
1098
1099 for (int f_code = MAX_FCODE; f_code > 0; f_code--)
1100 for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
1101 fcode_tab[mv + MAX_MV] = f_code;
1102 }
1103
ff_mpeg1_encode_init(MpegEncContext * s)1104 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1105 {
1106 static AVOnce init_static_once = AV_ONCE_INIT;
1107
1108 ff_mpeg12_common_init(s);
1109
1110 s->me.mv_penalty = mv_penalty;
1111 s->fcode_tab = fcode_tab;
1112 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1113 s->min_qcoeff = -255;
1114 s->max_qcoeff = 255;
1115 } else {
1116 s->min_qcoeff = -2047;
1117 s->max_qcoeff = 2047;
1118 }
1119 if (s->intra_vlc_format) {
1120 s->intra_ac_vlc_length =
1121 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1122 } else {
1123 s->intra_ac_vlc_length =
1124 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1125 }
1126 s->inter_ac_vlc_length =
1127 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1128
1129 ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1130 }
1131
1132 #define OFFSET(x) offsetof(MpegEncContext, x)
1133 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1134 #define COMMON_OPTS \
1135 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1136 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1137 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1138 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1139 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1140 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1141 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1142 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1143
1144 static const AVOption mpeg1_options[] = {
1145 COMMON_OPTS
1146 FF_MPV_COMMON_OPTS
1147 { NULL },
1148 };
1149
1150 static const AVOption mpeg2_options[] = {
1151 COMMON_OPTS
1152 { "intra_vlc", "Use MPEG-2 intra VLC table.",
1153 OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1154 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1155 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1156 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1157 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1158 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1159 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1160 { "video_format", "Video_format in the sequence_display_extension indicating the source of the video.", OFFSET(video_format), AV_OPT_TYPE_INT, { .i64 = VIDEO_FORMAT_UNSPECIFIED }, 0, 7, VE, "video_format" },
1161 { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1162 { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1163 { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1164 { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1165 { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1166 { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1167 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "avctx.level"
1168 { LEVEL("high", 4) },
1169 { LEVEL("high1440", 6) },
1170 { LEVEL("main", 8) },
1171 { LEVEL("low", 10) },
1172 #undef LEVEL
1173 FF_MPV_COMMON_OPTS
1174 FF_MPEG2_PROFILE_OPTS
1175 { NULL },
1176 };
1177
1178 #define mpeg12_class(x) \
1179 static const AVClass mpeg ## x ## _class = { \
1180 .class_name = "mpeg" # x "video encoder", \
1181 .item_name = av_default_item_name, \
1182 .option = mpeg ## x ## _options, \
1183 .version = LIBAVUTIL_VERSION_INT, \
1184 };
1185
1186 mpeg12_class(1)
1187 mpeg12_class(2)
1188
1189 AVCodec ff_mpeg1video_encoder = {
1190 .name = "mpeg1video",
1191 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1192 .type = AVMEDIA_TYPE_VIDEO,
1193 .id = AV_CODEC_ID_MPEG1VIDEO,
1194 .priv_data_size = sizeof(MpegEncContext),
1195 .init = encode_init,
1196 .encode2 = ff_mpv_encode_picture,
1197 .close = ff_mpv_encode_end,
1198 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1199 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1200 AV_PIX_FMT_NONE },
1201 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1202 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1203 .priv_class = &mpeg1_class,
1204 };
1205
1206 AVCodec ff_mpeg2video_encoder = {
1207 .name = "mpeg2video",
1208 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1209 .type = AVMEDIA_TYPE_VIDEO,
1210 .id = AV_CODEC_ID_MPEG2VIDEO,
1211 .priv_data_size = sizeof(MpegEncContext),
1212 .init = encode_init,
1213 .encode2 = ff_mpv_encode_picture,
1214 .close = ff_mpv_encode_end,
1215 .supported_framerates = ff_mpeg2_frame_rate_tab,
1216 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1217 AV_PIX_FMT_YUV422P,
1218 AV_PIX_FMT_NONE },
1219 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1220 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1221 .priv_class = &mpeg2_class,
1222 };
1223 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
1224