mpeg2enc: Don't mark all streams as component video
[libav.git] / libavcodec / mpeg12enc.c
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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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/log.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/stereo3d.h"
34
35 #include "avcodec.h"
36 #include "bytestream.h"
37 #include "mathops.h"
38 #include "mpeg12.h"
39 #include "mpeg12data.h"
40 #include "mpegutils.h"
41 #include "mpegvideo.h"
42
43
44 static const uint8_t inv_non_linear_qscale[] = {
45 0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
46 };
47
48 static const uint8_t svcd_scan_offset_placeholder[] = {
49 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
50 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
51 };
52
53 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
54 static uint8_t fcode_tab[MAX_MV * 2 + 1];
55
56 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
57 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
58
59 /* simple include everything table for dc, first byte is bits
60 * number next 3 are code */
61 static uint32_t mpeg1_lum_dc_uni[512];
62 static uint32_t mpeg1_chr_dc_uni[512];
63
64 static uint8_t mpeg1_index_run[2][64];
65 static int8_t mpeg1_max_level[2][64];
66
67 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
68 {
69 int i;
70
71 for (i = 0; i < 128; i++) {
72 int level = i - 64;
73 int run;
74 if (!level)
75 continue;
76 for (run = 0; run < 64; run++) {
77 int len, code;
78 int alevel = FFABS(level);
79
80 if (alevel > rl->max_level[0][run])
81 code = 111; /* rl->n */
82 else
83 code = rl->index_run[0][run] + alevel - 1;
84
85 if (code < 111) { /* rl->n */
86 /* length of VLC and sign */
87 len = rl->table_vlc[code][1] + 1;
88 } else {
89 len = rl->table_vlc[111][1] + 6; /* rl->n */
90
91 if (alevel < 128)
92 len += 8;
93 else
94 len += 16;
95 }
96
97 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
98 }
99 }
100 }
101
102 static int find_frame_rate_index(MpegEncContext *s)
103 {
104 int i;
105 int64_t dmin = INT64_MAX;
106 int64_t d;
107
108 for (i = 1; i < 14; i++) {
109 int64_t n0 = 1001LL / ff_mpeg12_frame_rate_tab[i].den *
110 ff_mpeg12_frame_rate_tab[i].num * s->avctx->time_base.num;
111 int64_t n1 = 1001LL * s->avctx->time_base.den;
112
113 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
114 i >= 9)
115 break;
116
117 d = FFABS(n0 - n1);
118 if (d < dmin) {
119 dmin = d;
120 s->frame_rate_index = i;
121 }
122 }
123
124 if (dmin)
125 return -1;
126 else
127 return 0;
128 }
129
130 static av_cold int encode_init(AVCodecContext *avctx)
131 {
132 MpegEncContext *s = avctx->priv_data;
133
134 if (ff_mpv_encode_init(avctx) < 0)
135 return -1;
136
137 if (find_frame_rate_index(s) < 0) {
138 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
139 av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
140 avctx->time_base.den, avctx->time_base.num);
141 return -1;
142 } else {
143 av_log(avctx, AV_LOG_INFO,
144 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
145 avctx->time_base.den, avctx->time_base.num);
146 }
147 }
148
149 if (avctx->profile == FF_PROFILE_UNKNOWN) {
150 if (avctx->level != FF_LEVEL_UNKNOWN) {
151 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
152 return -1;
153 }
154 /* Main or 4:2:2 */
155 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
156 }
157
158 if (avctx->level == FF_LEVEL_UNKNOWN) {
159 if (avctx->profile == 0) { /* 4:2:2 */
160 if (avctx->width <= 720 && avctx->height <= 608)
161 avctx->level = 5; /* Main */
162 else
163 avctx->level = 2; /* High */
164 } else {
165 if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
166 av_log(avctx, AV_LOG_ERROR,
167 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
168 return -1;
169 }
170 if (avctx->width <= 720 && avctx->height <= 576)
171 avctx->level = 8; /* Main */
172 else if (avctx->width <= 1440)
173 avctx->level = 6; /* High 1440 */
174 else
175 avctx->level = 4; /* High */
176 }
177 }
178
179 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
180 av_log(avctx, AV_LOG_ERROR,
181 "Drop frame time code only allowed with 1001/30000 fps\n");
182 return -1;
183 }
184
185 #if FF_API_PRIVATE_OPT
186 FF_DISABLE_DEPRECATION_WARNINGS
187 if (avctx->timecode_frame_start)
188 s->timecode_frame_start = avctx->timecode_frame_start;
189 FF_ENABLE_DEPRECATION_WARNINGS
190 #endif
191
192 return 0;
193 }
194
195 static void put_header(MpegEncContext *s, int header)
196 {
197 avpriv_align_put_bits(&s->pb);
198 put_bits(&s->pb, 16, header >> 16);
199 put_sbits(&s->pb, 16, header);
200 }
201
202 /* put sequence header if needed */
203 static void mpeg1_encode_sequence_header(MpegEncContext *s)
204 {
205 unsigned int vbv_buffer_size, fps, v;
206 int i, constraint_parameter_flag;
207 uint64_t time_code;
208 float best_aspect_error = 1E10;
209 float aspect_ratio = av_q2d(s->avctx->sample_aspect_ratio);
210
211 if (aspect_ratio == 0.0)
212 aspect_ratio = 1.0; // pixel aspect 1.1 (VGA)
213
214 if (s->current_picture.f->key_frame) {
215 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
216
217 /* MPEG-1 header repeated every GOP */
218 put_header(s, SEQ_START_CODE);
219
220 put_sbits(&s->pb, 12, s->width);
221 put_sbits(&s->pb, 12, s->height);
222
223 for (i = 1; i < 15; i++) {
224 float error = aspect_ratio;
225 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
226 error -= 1.0 / ff_mpeg1_aspect[i];
227 else
228 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
229
230 error = FFABS(error);
231
232 if (error < best_aspect_error) {
233 best_aspect_error = error;
234 s->aspect_ratio_info = i;
235 }
236 }
237
238 put_bits(&s->pb, 4, s->aspect_ratio_info);
239 put_bits(&s->pb, 4, s->frame_rate_index);
240
241 if (s->avctx->rc_max_rate) {
242 v = (s->avctx->rc_max_rate + 399) / 400;
243 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
244 v = 0x3ffff;
245 } else {
246 v = 0x3FFFF;
247 }
248
249 if (s->avctx->rc_buffer_size)
250 vbv_buffer_size = s->avctx->rc_buffer_size;
251 else
252 /* VBV calculation: Scaled so that a VCD has the proper
253 * VBV size of 40 kilobytes */
254 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
255 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
256
257 put_sbits(&s->pb, 18, v);
258 put_bits(&s->pb, 1, 1); // marker
259 put_sbits(&s->pb, 10, vbv_buffer_size);
260
261 constraint_parameter_flag =
262 s->width <= 768 &&
263 s->height <= 576 &&
264 s->mb_width * s->mb_height <= 396 &&
265 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
266 framerate.num <= framerate.den * 30 &&
267 s->avctx->me_range &&
268 s->avctx->me_range < 128 &&
269 vbv_buffer_size <= 20 &&
270 v <= 1856000 / 400 &&
271 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
272
273 put_bits(&s->pb, 1, constraint_parameter_flag);
274
275 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
276 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
277
278 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
279 put_header(s, EXT_START_CODE);
280 put_bits(&s->pb, 4, 1); // seq ext
281
282 put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
283
284 put_bits(&s->pb, 3, s->avctx->profile); // profile
285 put_bits(&s->pb, 4, s->avctx->level); // level
286
287 put_bits(&s->pb, 1, s->progressive_sequence);
288 put_bits(&s->pb, 2, s->chroma_format);
289 put_bits(&s->pb, 2, s->width >> 12);
290 put_bits(&s->pb, 2, s->height >> 12);
291 put_bits(&s->pb, 12, v >> 18); // bitrate ext
292 put_bits(&s->pb, 1, 1); // marker
293 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
294 put_bits(&s->pb, 1, s->low_delay);
295 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
296 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
297
298 put_header(s, EXT_START_CODE);
299 put_bits(&s->pb, 4, 2); // sequence display extension
300 put_bits(&s->pb, 3, 5); // video_format: 5 is unspecified
301 put_bits(&s->pb, 1, 1); // colour_description
302 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
303 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
304 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
305 put_bits(&s->pb, 14, s->width); // display_horizontal_size
306 put_bits(&s->pb, 1, 1); // marker_bit
307 put_bits(&s->pb, 14, s->height); // display_vertical_size
308 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
309 }
310
311 put_header(s, GOP_START_CODE);
312 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
313 /* time code: we must convert from the real frame rate to a
314 * fake MPEG frame rate in case of low frame rate */
315 fps = (framerate.num + framerate.den / 2) / framerate.den;
316 time_code = s->current_picture_ptr->f->coded_picture_number +
317 s->timecode_frame_start;
318
319 s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
320 if (s->drop_frame_timecode) {
321 /* only works for NTSC 29.97 */
322 int d = time_code / 17982;
323 int m = time_code % 17982;
324 /* not needed since -2,-1 / 1798 in C returns 0 */
325 // if (m < 2)
326 // m += 2;
327 time_code += 18 * d + 2 * ((m - 2) / 1798);
328 }
329 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
330 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
331 put_bits(&s->pb, 1, 1);
332 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
333 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
334 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only);
335 put_bits(&s->pb, 1, 0); // broken link
336 }
337 }
338
339 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
340 {
341 while (run >= 33) {
342 put_bits(&s->pb, 11, 0x008);
343 run -= 33;
344 }
345 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
346 ff_mpeg12_mbAddrIncrTable[run][0]);
347 }
348
349 static av_always_inline void put_qscale(MpegEncContext *s)
350 {
351 if (s->q_scale_type) {
352 assert(s->qscale >= 1 && s->qscale <= 12);
353 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
354 } else {
355 put_bits(&s->pb, 5, s->qscale);
356 }
357 }
358
359 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
360 {
361 if (s->height > 2800) {
362 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
363 /* slice_vertical_position_extension */
364 put_bits(&s->pb, 3, s->mb_y >> 7);
365 } else {
366 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
367 }
368 put_qscale(s);
369 /* slice extra information */
370 put_bits(&s->pb, 1, 0);
371 }
372
373 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
374 {
375 AVFrameSideData *side_data;
376 mpeg1_encode_sequence_header(s);
377
378 /* MPEG-1 picture header */
379 put_header(s, PICTURE_START_CODE);
380 /* temporal reference */
381
382 // RAL: s->picture_number instead of s->fake_picture_number
383 put_bits(&s->pb, 10,
384 (s->picture_number - s->gop_picture_number) & 0x3ff);
385 put_bits(&s->pb, 3, s->pict_type);
386
387 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
388 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
389
390 // RAL: Forward f_code also needed for B-frames
391 if (s->pict_type == AV_PICTURE_TYPE_P ||
392 s->pict_type == AV_PICTURE_TYPE_B) {
393 put_bits(&s->pb, 1, 0); /* half pel coordinates */
394 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
395 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
396 else
397 put_bits(&s->pb, 3, 7); /* forward_f_code */
398 }
399
400 // RAL: Backward f_code necessary for B-frames
401 if (s->pict_type == AV_PICTURE_TYPE_B) {
402 put_bits(&s->pb, 1, 0); /* half pel coordinates */
403 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
404 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
405 else
406 put_bits(&s->pb, 3, 7); /* backward_f_code */
407 }
408
409 put_bits(&s->pb, 1, 0); /* extra bit picture */
410
411 s->frame_pred_frame_dct = 1;
412 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
413 put_header(s, EXT_START_CODE);
414 put_bits(&s->pb, 4, 8); /* pic ext */
415 if (s->pict_type == AV_PICTURE_TYPE_P ||
416 s->pict_type == AV_PICTURE_TYPE_B) {
417 put_bits(&s->pb, 4, s->f_code);
418 put_bits(&s->pb, 4, s->f_code);
419 } else {
420 put_bits(&s->pb, 8, 255);
421 }
422 if (s->pict_type == AV_PICTURE_TYPE_B) {
423 put_bits(&s->pb, 4, s->b_code);
424 put_bits(&s->pb, 4, s->b_code);
425 } else {
426 put_bits(&s->pb, 8, 255);
427 }
428 put_bits(&s->pb, 2, s->intra_dc_precision);
429
430 assert(s->picture_structure == PICT_FRAME);
431 put_bits(&s->pb, 2, s->picture_structure);
432 if (s->progressive_sequence)
433 put_bits(&s->pb, 1, 0); /* no repeat */
434 else
435 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
436 /* XXX: optimize the generation of this flag with entropy measures */
437 s->frame_pred_frame_dct = s->progressive_sequence;
438
439 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
440 put_bits(&s->pb, 1, s->concealment_motion_vectors);
441 put_bits(&s->pb, 1, s->q_scale_type);
442 put_bits(&s->pb, 1, s->intra_vlc_format);
443 put_bits(&s->pb, 1, s->alternate_scan);
444 put_bits(&s->pb, 1, s->repeat_first_field);
445 s->progressive_frame = s->progressive_sequence;
446 /* chroma_420_type */
447 put_bits(&s->pb, 1, s->chroma_format ==
448 CHROMA_420 ? s->progressive_frame : 0);
449 put_bits(&s->pb, 1, s->progressive_frame);
450 put_bits(&s->pb, 1, 0); /* composite_display_flag */
451 }
452 if (s->scan_offset) {
453 int i;
454
455 put_header(s, USER_START_CODE);
456 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
457 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
458 }
459 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
460 AV_FRAME_DATA_STEREO3D);
461 if (side_data) {
462 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
463 uint8_t fpa_type;
464
465 switch (stereo->type) {
466 case AV_STEREO3D_SIDEBYSIDE:
467 fpa_type = 0x03;
468 break;
469 case AV_STEREO3D_TOPBOTTOM:
470 fpa_type = 0x04;
471 break;
472 case AV_STEREO3D_2D:
473 fpa_type = 0x08;
474 break;
475 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
476 fpa_type = 0x23;
477 break;
478 default:
479 fpa_type = 0;
480 break;
481 }
482
483 if (fpa_type != 0) {
484 put_header(s, USER_START_CODE);
485 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
486 put_bits(&s->pb, 8, 'P');
487 put_bits(&s->pb, 8, '3');
488 put_bits(&s->pb, 8, 'D');
489 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
490
491 put_bits(&s->pb, 1, 1); // reserved_bit
492 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
493 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
494 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
495 }
496 }
497
498 s->mb_y = 0;
499 ff_mpeg1_encode_slice_header(s);
500 }
501
502 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
503 int has_mv, int field_motion)
504 {
505 put_bits(&s->pb, n, bits);
506 if (!s->frame_pred_frame_dct) {
507 if (has_mv)
508 /* motion_type: frame/field */
509 put_bits(&s->pb, 2, 2 - field_motion);
510 put_bits(&s->pb, 1, s->interlaced_dct);
511 }
512 }
513
514 // RAL: Parameter added: f_or_b_code
515 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
516 {
517 if (val == 0) {
518 /* zero vector */
519 put_bits(&s->pb,
520 ff_mpeg12_mbMotionVectorTable[0][1],
521 ff_mpeg12_mbMotionVectorTable[0][0]);
522 } else {
523 int code, sign, bits;
524 int bit_size = f_or_b_code - 1;
525 int range = 1 << bit_size;
526 /* modulo encoding */
527 val = sign_extend(val, 5 + bit_size);
528
529 if (val >= 0) {
530 val--;
531 code = (val >> bit_size) + 1;
532 bits = val & (range - 1);
533 sign = 0;
534 } else {
535 val = -val;
536 val--;
537 code = (val >> bit_size) + 1;
538 bits = val & (range - 1);
539 sign = 1;
540 }
541
542 assert(code > 0 && code <= 16);
543
544 put_bits(&s->pb,
545 ff_mpeg12_mbMotionVectorTable[code][1],
546 ff_mpeg12_mbMotionVectorTable[code][0]);
547
548 put_bits(&s->pb, 1, sign);
549 if (bit_size > 0)
550 put_bits(&s->pb, bit_size, bits);
551 }
552 }
553
554 static inline void encode_dc(MpegEncContext *s, int diff, int component)
555 {
556 unsigned int diff_u = diff + 255;
557 if (diff_u >= 511) {
558 int index;
559
560 if (diff < 0) {
561 index = av_log2_16bit(-2 * diff);
562 diff--;
563 } else {
564 index = av_log2_16bit(2 * diff);
565 }
566 if (component == 0)
567 put_bits(&s->pb,
568 ff_mpeg12_vlc_dc_lum_bits[index] + index,
569 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
570 (diff & ((1 << index) - 1)));
571 else
572 put_bits(&s->pb,
573 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
574 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
575 (diff & ((1 << index) - 1)));
576 } else {
577 if (component == 0)
578 put_bits(&s->pb,
579 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
580 mpeg1_lum_dc_uni[diff + 255] >> 8);
581 else
582 put_bits(&s->pb,
583 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
584 mpeg1_chr_dc_uni[diff + 255] >> 8);
585 }
586 }
587
588 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
589 {
590 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
591 int code, component;
592 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
593
594 last_index = s->block_last_index[n];
595
596 /* DC coef */
597 if (s->mb_intra) {
598 component = (n <= 3 ? 0 : (n & 1) + 1);
599 dc = block[0]; /* overflow is impossible */
600 diff = dc - s->last_dc[component];
601 encode_dc(s, diff, component);
602 s->last_dc[component] = dc;
603 i = 1;
604 if (s->intra_vlc_format)
605 table_vlc = ff_rl_mpeg2.table_vlc;
606 } else {
607 /* encode the first coefficient: needs to be done here because
608 * it is handled slightly differently */
609 level = block[0];
610 if (abs(level) == 1) {
611 code = ((uint32_t)level >> 31); /* the sign bit */
612 put_bits(&s->pb, 2, code | 0x02);
613 i = 1;
614 } else {
615 i = 0;
616 last_non_zero = -1;
617 goto next_coef;
618 }
619 }
620
621 /* now quantify & encode AC coefs */
622 last_non_zero = i - 1;
623
624 for (; i <= last_index; i++) {
625 j = s->intra_scantable.permutated[i];
626 level = block[j];
627
628 next_coef:
629 /* encode using VLC */
630 if (level != 0) {
631 run = i - last_non_zero - 1;
632
633 alevel = level;
634 MASK_ABS(sign, alevel);
635 sign &= 1;
636
637 if (alevel <= mpeg1_max_level[0][run]) {
638 code = mpeg1_index_run[0][run] + alevel - 1;
639 /* store the VLC & sign at once */
640 put_bits(&s->pb, table_vlc[code][1] + 1,
641 (table_vlc[code][0] << 1) + sign);
642 } else {
643 /* escape seems to be pretty rare <5% so I do not optimize it */
644 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
645 /* escape: only clip in this case */
646 put_bits(&s->pb, 6, run);
647 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
648 if (alevel < 128) {
649 put_sbits(&s->pb, 8, level);
650 } else {
651 if (level < 0)
652 put_bits(&s->pb, 16, 0x8001 + level + 255);
653 else
654 put_sbits(&s->pb, 16, level);
655 }
656 } else {
657 put_sbits(&s->pb, 12, level);
658 }
659 }
660 last_non_zero = i;
661 }
662 }
663 /* end of block */
664 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
665 }
666
667 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
668 int16_t block[8][64],
669 int motion_x, int motion_y,
670 int mb_block_count)
671 {
672 int i, cbp;
673 const int mb_x = s->mb_x;
674 const int mb_y = s->mb_y;
675 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
676
677 /* compute cbp */
678 cbp = 0;
679 for (i = 0; i < mb_block_count; i++)
680 if (s->block_last_index[i] >= 0)
681 cbp |= 1 << (mb_block_count - 1 - i);
682
683 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
684 (mb_x != s->mb_width - 1 ||
685 (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
686 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
687 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
688 (((s->mv_dir & MV_DIR_FORWARD)
689 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
690 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
691 ((s->mv_dir & MV_DIR_BACKWARD)
692 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
693 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
694 s->mb_skip_run++;
695 s->qscale -= s->dquant;
696 s->skip_count++;
697 s->misc_bits++;
698 s->last_bits++;
699 if (s->pict_type == AV_PICTURE_TYPE_P) {
700 s->last_mv[0][0][0] =
701 s->last_mv[0][0][1] =
702 s->last_mv[0][1][0] =
703 s->last_mv[0][1][1] = 0;
704 }
705 } else {
706 if (first_mb) {
707 assert(s->mb_skip_run == 0);
708 encode_mb_skip_run(s, s->mb_x);
709 } else {
710 encode_mb_skip_run(s, s->mb_skip_run);
711 }
712
713 if (s->pict_type == AV_PICTURE_TYPE_I) {
714 if (s->dquant && cbp) {
715 /* macroblock_type: macroblock_quant = 1 */
716 put_mb_modes(s, 2, 1, 0, 0);
717 put_qscale(s);
718 } else {
719 /* macroblock_type: macroblock_quant = 0 */
720 put_mb_modes(s, 1, 1, 0, 0);
721 s->qscale -= s->dquant;
722 }
723 s->misc_bits += get_bits_diff(s);
724 s->i_count++;
725 } else if (s->mb_intra) {
726 if (s->dquant && cbp) {
727 put_mb_modes(s, 6, 0x01, 0, 0);
728 put_qscale(s);
729 } else {
730 put_mb_modes(s, 5, 0x03, 0, 0);
731 s->qscale -= s->dquant;
732 }
733 s->misc_bits += get_bits_diff(s);
734 s->i_count++;
735 memset(s->last_mv, 0, sizeof(s->last_mv));
736 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
737 if (s->mv_type == MV_TYPE_16X16) {
738 if (cbp != 0) {
739 if ((motion_x | motion_y) == 0) {
740 if (s->dquant) {
741 /* macroblock_pattern & quant */
742 put_mb_modes(s, 5, 1, 0, 0);
743 put_qscale(s);
744 } else {
745 /* macroblock_pattern only */
746 put_mb_modes(s, 2, 1, 0, 0);
747 }
748 s->misc_bits += get_bits_diff(s);
749 } else {
750 if (s->dquant) {
751 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
752 put_qscale(s);
753 } else {
754 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
755 }
756 s->misc_bits += get_bits_diff(s);
757 // RAL: f_code parameter added
758 mpeg1_encode_motion(s,
759 motion_x - s->last_mv[0][0][0],
760 s->f_code);
761 // RAL: f_code parameter added
762 mpeg1_encode_motion(s,
763 motion_y - s->last_mv[0][0][1],
764 s->f_code);
765 s->mv_bits += get_bits_diff(s);
766 }
767 } else {
768 put_bits(&s->pb, 3, 1); /* motion only */
769 if (!s->frame_pred_frame_dct)
770 put_bits(&s->pb, 2, 2); /* motion_type: frame */
771 s->misc_bits += get_bits_diff(s);
772 // RAL: f_code parameter added
773 mpeg1_encode_motion(s,
774 motion_x - s->last_mv[0][0][0],
775 s->f_code);
776 // RAL: f_code parameter added
777 mpeg1_encode_motion(s,
778 motion_y - s->last_mv[0][0][1],
779 s->f_code);
780 s->qscale -= s->dquant;
781 s->mv_bits += get_bits_diff(s);
782 }
783 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
784 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
785 } else {
786 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
787
788 if (cbp) {
789 if (s->dquant) {
790 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
791 put_qscale(s);
792 } else {
793 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
794 }
795 } else {
796 put_bits(&s->pb, 3, 1); /* motion only */
797 put_bits(&s->pb, 2, 1); /* motion_type: field */
798 s->qscale -= s->dquant;
799 }
800 s->misc_bits += get_bits_diff(s);
801 for (i = 0; i < 2; i++) {
802 put_bits(&s->pb, 1, s->field_select[0][i]);
803 mpeg1_encode_motion(s,
804 s->mv[0][i][0] - s->last_mv[0][i][0],
805 s->f_code);
806 mpeg1_encode_motion(s,
807 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
808 s->f_code);
809 s->last_mv[0][i][0] = s->mv[0][i][0];
810 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
811 }
812 s->mv_bits += get_bits_diff(s);
813 }
814 if (cbp) {
815 if (s->chroma_y_shift) {
816 put_bits(&s->pb,
817 ff_mpeg12_mbPatTable[cbp][1],
818 ff_mpeg12_mbPatTable[cbp][0]);
819 } else {
820 put_bits(&s->pb,
821 ff_mpeg12_mbPatTable[cbp >> 2][1],
822 ff_mpeg12_mbPatTable[cbp >> 2][0]);
823 put_sbits(&s->pb, 2, cbp);
824 }
825 }
826 s->f_count++;
827 } else {
828 if (s->mv_type == MV_TYPE_16X16) {
829 if (cbp) { // With coded bloc pattern
830 if (s->dquant) {
831 if (s->mv_dir == MV_DIR_FORWARD)
832 put_mb_modes(s, 6, 3, 1, 0);
833 else
834 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
835 put_qscale(s);
836 } else {
837 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
838 }
839 } else { // No coded bloc pattern
840 put_bits(&s->pb, 5 - s->mv_dir, 2);
841 if (!s->frame_pred_frame_dct)
842 put_bits(&s->pb, 2, 2); /* motion_type: frame */
843 s->qscale -= s->dquant;
844 }
845 s->misc_bits += get_bits_diff(s);
846 if (s->mv_dir & MV_DIR_FORWARD) {
847 mpeg1_encode_motion(s,
848 s->mv[0][0][0] - s->last_mv[0][0][0],
849 s->f_code);
850 mpeg1_encode_motion(s,
851 s->mv[0][0][1] - s->last_mv[0][0][1],
852 s->f_code);
853 s->last_mv[0][0][0] =
854 s->last_mv[0][1][0] = s->mv[0][0][0];
855 s->last_mv[0][0][1] =
856 s->last_mv[0][1][1] = s->mv[0][0][1];
857 s->f_count++;
858 }
859 if (s->mv_dir & MV_DIR_BACKWARD) {
860 mpeg1_encode_motion(s,
861 s->mv[1][0][0] - s->last_mv[1][0][0],
862 s->b_code);
863 mpeg1_encode_motion(s,
864 s->mv[1][0][1] - s->last_mv[1][0][1],
865 s->b_code);
866 s->last_mv[1][0][0] =
867 s->last_mv[1][1][0] = s->mv[1][0][0];
868 s->last_mv[1][0][1] =
869 s->last_mv[1][1][1] = s->mv[1][0][1];
870 s->b_count++;
871 }
872 } else {
873 assert(s->mv_type == MV_TYPE_FIELD);
874 assert(!s->frame_pred_frame_dct);
875 if (cbp) { // With coded bloc pattern
876 if (s->dquant) {
877 if (s->mv_dir == MV_DIR_FORWARD)
878 put_mb_modes(s, 6, 3, 1, 1);
879 else
880 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
881 put_qscale(s);
882 } else {
883 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
884 }
885 } else { // No coded bloc pattern
886 put_bits(&s->pb, 5 - s->mv_dir, 2);
887 put_bits(&s->pb, 2, 1); /* motion_type: field */
888 s->qscale -= s->dquant;
889 }
890 s->misc_bits += get_bits_diff(s);
891 if (s->mv_dir & MV_DIR_FORWARD) {
892 for (i = 0; i < 2; i++) {
893 put_bits(&s->pb, 1, s->field_select[0][i]);
894 mpeg1_encode_motion(s,
895 s->mv[0][i][0] - s->last_mv[0][i][0],
896 s->f_code);
897 mpeg1_encode_motion(s,
898 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
899 s->f_code);
900 s->last_mv[0][i][0] = s->mv[0][i][0];
901 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
902 }
903 s->f_count++;
904 }
905 if (s->mv_dir & MV_DIR_BACKWARD) {
906 for (i = 0; i < 2; i++) {
907 put_bits(&s->pb, 1, s->field_select[1][i]);
908 mpeg1_encode_motion(s,
909 s->mv[1][i][0] - s->last_mv[1][i][0],
910 s->b_code);
911 mpeg1_encode_motion(s,
912 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
913 s->b_code);
914 s->last_mv[1][i][0] = s->mv[1][i][0];
915 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
916 }
917 s->b_count++;
918 }
919 }
920 s->mv_bits += get_bits_diff(s);
921 if (cbp) {
922 if (s->chroma_y_shift) {
923 put_bits(&s->pb,
924 ff_mpeg12_mbPatTable[cbp][1],
925 ff_mpeg12_mbPatTable[cbp][0]);
926 } else {
927 put_bits(&s->pb,
928 ff_mpeg12_mbPatTable[cbp >> 2][1],
929 ff_mpeg12_mbPatTable[cbp >> 2][0]);
930 put_sbits(&s->pb, 2, cbp);
931 }
932 }
933 }
934 for (i = 0; i < mb_block_count; i++)
935 if (cbp & (1 << (mb_block_count - 1 - i)))
936 mpeg1_encode_block(s, block[i], i);
937 s->mb_skip_run = 0;
938 if (s->mb_intra)
939 s->i_tex_bits += get_bits_diff(s);
940 else
941 s->p_tex_bits += get_bits_diff(s);
942 }
943 }
944
945 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
946 int motion_x, int motion_y)
947 {
948 if (s->chroma_format == CHROMA_420)
949 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
950 else
951 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
952 }
953
954 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
955 {
956 static int done = 0;
957
958 ff_mpeg12_common_init(s);
959
960 if (!done) {
961 int f_code;
962 int mv;
963 int i;
964
965 done = 1;
966 ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
967 ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
968
969 for (i = 0; i < 64; i++) {
970 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
971 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
972 }
973
974 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
975 if (s->intra_vlc_format)
976 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
977
978 /* build unified dc encoding tables */
979 for (i = -255; i < 256; i++) {
980 int adiff, index;
981 int bits, code;
982 int diff = i;
983
984 adiff = FFABS(diff);
985 if (diff < 0)
986 diff--;
987 index = av_log2(2 * adiff);
988
989 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
990 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
991 (diff & ((1 << index) - 1));
992 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
993
994 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
995 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
996 (diff & ((1 << index) - 1));
997 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
998 }
999
1000 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1001 for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1002 int len;
1003
1004 if (mv == 0) {
1005 len = ff_mpeg12_mbMotionVectorTable[0][1];
1006 } else {
1007 int val, bit_size, code;
1008
1009 bit_size = f_code - 1;
1010
1011 val = mv;
1012 if (val < 0)
1013 val = -val;
1014 val--;
1015 code = (val >> bit_size) + 1;
1016 if (code < 17)
1017 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1018 1 + bit_size;
1019 else
1020 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1021 2 + bit_size;
1022 }
1023
1024 mv_penalty[f_code][mv + MAX_MV] = len;
1025 }
1026
1027
1028 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1029 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1030 fcode_tab[mv + MAX_MV] = f_code;
1031 }
1032 s->me.mv_penalty = mv_penalty;
1033 s->fcode_tab = fcode_tab;
1034 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1035 s->min_qcoeff = -255;
1036 s->max_qcoeff = 255;
1037 } else {
1038 s->min_qcoeff = -2047;
1039 s->max_qcoeff = 2047;
1040 }
1041 if (s->intra_vlc_format) {
1042 s->intra_ac_vlc_length =
1043 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1044 } else {
1045 s->intra_ac_vlc_length =
1046 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1047 }
1048 s->inter_ac_vlc_length =
1049 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1050 }
1051
1052 #define OFFSET(x) offsetof(MpegEncContext, x)
1053 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1054 #define COMMON_OPTS \
1055 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1056 OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1057 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1058 OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1059 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1060 OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1061 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1062 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, VE}, \
1063
1064 static const AVOption mpeg1_options[] = {
1065 COMMON_OPTS
1066 FF_MPV_COMMON_OPTS
1067 { NULL },
1068 };
1069
1070 static const AVOption mpeg2_options[] = {
1071 COMMON_OPTS
1072 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1073 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1074 FF_MPV_COMMON_OPTS
1075 { NULL },
1076 };
1077
1078 #define mpeg12_class(x) \
1079 static const AVClass mpeg ## x ## _class = { \
1080 .class_name = "mpeg" # x "video encoder", \
1081 .item_name = av_default_item_name, \
1082 .option = mpeg ## x ## _options, \
1083 .version = LIBAVUTIL_VERSION_INT, \
1084 };
1085
1086 mpeg12_class(1)
1087 mpeg12_class(2)
1088
1089 AVCodec ff_mpeg1video_encoder = {
1090 .name = "mpeg1video",
1091 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1092 .type = AVMEDIA_TYPE_VIDEO,
1093 .id = AV_CODEC_ID_MPEG1VIDEO,
1094 .priv_data_size = sizeof(MpegEncContext),
1095 .init = encode_init,
1096 .encode2 = ff_mpv_encode_picture,
1097 .close = ff_mpv_encode_end,
1098 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1099 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1100 AV_PIX_FMT_NONE },
1101 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1102 .priv_class = &mpeg1_class,
1103 };
1104
1105 AVCodec ff_mpeg2video_encoder = {
1106 .name = "mpeg2video",
1107 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1108 .type = AVMEDIA_TYPE_VIDEO,
1109 .id = AV_CODEC_ID_MPEG2VIDEO,
1110 .priv_data_size = sizeof(MpegEncContext),
1111 .init = encode_init,
1112 .encode2 = ff_mpv_encode_picture,
1113 .close = ff_mpv_encode_end,
1114 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1115 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1116 AV_PIX_FMT_YUV422P,
1117 AV_PIX_FMT_NONE },
1118 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1119 .priv_class = &mpeg2_class,
1120 };