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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / mpeg4videoenc.c
CommitLineData
2ba45a60
DM		 1/*
2 * MPEG4 encoder.
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2010 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#include "libavutil/attributes.h"
24#include "libavutil/log.h"
25#include "libavutil/opt.h"
26#include "mpegutils.h"
27#include "mpegvideo.h"
28#include "h263.h"
29#include "mpeg4video.h"
30
31/* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
32 * differences in mpeg4. Unified in the sense that the specification specifies
33 * this encoding in several steps. */
34static uint8_t uni_DCtab_lum_len[512];
35static uint8_t uni_DCtab_chrom_len[512];
36static uint16_t uni_DCtab_lum_bits[512];
37static uint16_t uni_DCtab_chrom_bits[512];
38
39/* Unified encoding tables for run length encoding of coefficients.
40 * Unified in the sense that the specification specifies the encoding in several steps. */
41static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
42static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
43static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
44static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
45
46//#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
47//#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
48#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
49
50/* mpeg4
51 * inter
52 * max level: 24/6
53 * max run: 53/63
54 *
55 * intra
56 * max level: 53/16
57 * max run: 29/41
58 */
59
60/**
61 * Return the number of bits that encoding the 8x8 block in block would need.
62 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
63 */
64static inline int get_block_rate(MpegEncContext *s, int16_t block[64],
65 int block_last_index, uint8_t scantable[64])
66{
67 int last = 0;
68 int j;
69 int rate = 0;
70
71 for (j = 1; j <= block_last_index; j++) {
72 const int index = scantable[j];
73 int level = block[index];
74 if (level) {
75 level += 64;
76 if ((level & (~127)) == 0) {
77 if (j < block_last_index)
78 rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
79 else
80 rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
81 } else
82 rate += s->ac_esc_length;
83
84 last = j;
85 }
86 }
87
88 return rate;
89}
90
91/**
92 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
93 * This function also restores s->block_last_index.
94 * @param[in,out] block MB coefficients, these will be restored
95 * @param[in] dir ac prediction direction for each 8x8 block
96 * @param[out] st scantable for each 8x8 block
97 * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
98 */
99static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64],
100 const int dir[6], uint8_t *st[6],
101 const int zigzag_last_index[6])
102{
103 int i, n;
104 memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6);
105
106 for (n = 0; n < 6; n++) {
107 int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
108
109 st[n] = s->intra_scantable.permutated;
110 if (dir[n]) {
111 /* top prediction */
112 for (i = 1; i < 8; i++)
113 block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8];
114 } else {
115 /* left prediction */
116 for (i = 1; i < 8; i++)
117 block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i];
118 }
119 }
120}
121
122/**
123 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
124 * This function will also update s->block_last_index and s->ac_val.
125 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
126 * @param[in] dir ac prediction direction for each 8x8 block
127 * @param[out] st scantable for each 8x8 block
128 * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
129 */
130static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64],
131 const int dir[6], uint8_t *st[6],
132 int zigzag_last_index[6])
133{
134 int score = 0;
135 int i, n;
136 int8_t *const qscale_table = s->current_picture.qscale_table;
137
138 memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6);
139
140 for (n = 0; n < 6; n++) {
141 int16_t *ac_val, *ac_val1;
142
143 score -= get_block_rate(s, block[n], s->block_last_index[n],
144 s->intra_scantable.permutated);
145
146 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
147 ac_val1 = ac_val;
148 if (dir[n]) {
149 const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
150 /* top prediction */
151 ac_val -= s->block_wrap[n] * 16;
152 if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) {
153 /* same qscale */
154 for (i = 1; i < 8; i++) {
155 const int level = block[n][s->idsp.idct_permutation[i]];
156 block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8];
157 ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]];
158 ac_val1[i + 8] = level;
159 }
160 } else {
161 /* different qscale, we must rescale */
162 for (i = 1; i < 8; i++) {
163 const int level = block[n][s->idsp.idct_permutation[i]];
164 block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
165 ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]];
166 ac_val1[i + 8] = level;
167 }
168 }
169 st[n] = s->intra_h_scantable.permutated;
170 } else {
171 const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
172 /* left prediction */
173 ac_val -= 16;
174 if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) {
175 /* same qscale */
176 for (i = 1; i < 8; i++) {
177 const int level = block[n][s->idsp.idct_permutation[i << 3]];
178 block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i];
179 ac_val1[i] = level;
180 ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
181 }
182 } else {
183 /* different qscale, we must rescale */
184 for (i = 1; i < 8; i++) {
185 const int level = block[n][s->idsp.idct_permutation[i << 3]];
186 block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
187 ac_val1[i] = level;
188 ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
189 }
190 }
191 st[n] = s->intra_v_scantable.permutated;
192 }
193
194 for (i = 63; i > 0; i--) // FIXME optimize
195 if (block[n][st[n][i]])
196 break;
197 s->block_last_index[n] = i;
198
199 score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
200 }
201
202 if (score < 0) {
203 return 1;
204 } else {
205 restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
206 return 0;
207 }
208}
209
210/**
211 * modify mb_type & qscale so that encoding is actually possible in mpeg4
212 */
213void ff_clean_mpeg4_qscales(MpegEncContext *s)
214{
215 int i;
216 int8_t *const qscale_table = s->current_picture.qscale_table;
217
218 ff_clean_h263_qscales(s);
219
220 if (s->pict_type == AV_PICTURE_TYPE_B) {
221 int odd = 0;
222 /* ok, come on, this isn't funny anymore, there's more code for
223 * handling this mpeg4 mess than for the actual adaptive quantization */
224
225 for (i = 0; i < s->mb_num; i++) {
226 int mb_xy = s->mb_index2xy[i];
227 odd += qscale_table[mb_xy] & 1;
228 }
229
230 if (2 * odd > s->mb_num)
231 odd = 1;
232 else
233 odd = 0;
234
235 for (i = 0; i < s->mb_num; i++) {
236 int mb_xy = s->mb_index2xy[i];
237 if ((qscale_table[mb_xy] & 1) != odd)
238 qscale_table[mb_xy]++;
239 if (qscale_table[mb_xy] > 31)
240 qscale_table[mb_xy] = 31;
241 }
242
243 for (i = 1; i < s->mb_num; i++) {
244 int mb_xy = s->mb_index2xy[i];
245 if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] &&
246 (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
247 s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
248 }
249 }
250 }
251}
252
253/**
254 * Encode the dc value.
255 * @param n block index (0-3 are luma, 4-5 are chroma)
256 */
257static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
258{
259#if 1
260 /* DC will overflow if level is outside the [-255,255] range. */
261 level += 256;
262 if (n < 4) {
263 /* luminance */
264 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
265 } else {
266 /* chrominance */
267 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
268 }
269#else
270 int size, v;
271 /* find number of bits */
272 size = 0;
273 v = abs(level);
274 while (v) {
275 v >>= 1;
276 size++;
277 }
278
279 if (n < 4) {
280 /* luminance */
281 put_bits(s, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
282 } else {
283 /* chrominance */
284 put_bits(s, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
285 }
286
287 /* encode remaining bits */
288 if (size > 0) {
289 if (level < 0)
290 level = (-level) ^ ((1 << size) - 1);
291 put_bits(s, size, level);
292 if (size > 8)
293 put_bits(s, 1, 1);
294 }
295#endif
296}
297
298static inline int mpeg4_get_dc_length(int level, int n)
299{
300 if (n < 4)
301 return uni_DCtab_lum_len[level + 256];
302 else
303 return uni_DCtab_chrom_len[level + 256];
304}
305
306/**
307 * Encode an 8x8 block.
308 * @param n block index (0-3 are luma, 4-5 are chroma)
309 */
310static inline void mpeg4_encode_block(MpegEncContext *s,
311 int16_t *block, int n, int intra_dc,
312 uint8_t *scan_table, PutBitContext *dc_pb,
313 PutBitContext *ac_pb)
314{
315 int i, last_non_zero;
316 uint32_t *bits_tab;
317 uint8_t *len_tab;
318 const int last_index = s->block_last_index[n];
319
320 if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
321 /* mpeg4 based DC predictor */
322 mpeg4_encode_dc(dc_pb, intra_dc, n);
323 if (last_index < 1)
324 return;
325 i = 1;
326 bits_tab = uni_mpeg4_intra_rl_bits;
327 len_tab = uni_mpeg4_intra_rl_len;
328 } else {
329 if (last_index < 0)
330 return;
331 i = 0;
332 bits_tab = uni_mpeg4_inter_rl_bits;
333 len_tab = uni_mpeg4_inter_rl_len;
334 }
335
336 /* AC coefs */
337 last_non_zero = i - 1;
338 for (; i < last_index; i++) {
339 int level = block[scan_table[i]];
340 if (level) {
341 int run = i - last_non_zero - 1;
342 level += 64;
343 if ((level & (~127)) == 0) {
344 const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
345 put_bits(ac_pb, len_tab[index], bits_tab[index]);
346 } else { // ESC3
347 put_bits(ac_pb,
348 7 + 2 + 1 + 6 + 1 + 12 + 1,
349 (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
350 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
351 }
352 last_non_zero = i;
353 }
354 }
355 /* if (i <= last_index) */ {
356 int level = block[scan_table[i]];
357 int run = i - last_non_zero - 1;
358 level += 64;
359 if ((level & (~127)) == 0) {
360 const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
361 put_bits(ac_pb, len_tab[index], bits_tab[index]);
362 } else { // ESC3
363 put_bits(ac_pb,
364 7 + 2 + 1 + 6 + 1 + 12 + 1,
365 (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
366 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
367 }
368 }
369}
370
371static int mpeg4_get_block_length(MpegEncContext *s,
372 int16_t *block, int n,
373 int intra_dc, uint8_t *scan_table)
374{
375 int i, last_non_zero;
376 uint8_t *len_tab;
377 const int last_index = s->block_last_index[n];
378 int len = 0;
379
380 if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
381 /* mpeg4 based DC predictor */
382 len += mpeg4_get_dc_length(intra_dc, n);
383 if (last_index < 1)
384 return len;
385 i = 1;
386 len_tab = uni_mpeg4_intra_rl_len;
387 } else {
388 if (last_index < 0)
389 return 0;
390 i = 0;
391 len_tab = uni_mpeg4_inter_rl_len;
392 }
393
394 /* AC coefs */
395 last_non_zero = i - 1;
396 for (; i < last_index; i++) {
397 int level = block[scan_table[i]];
398 if (level) {
399 int run = i - last_non_zero - 1;
400 level += 64;
401 if ((level & (~127)) == 0) {
402 const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
403 len += len_tab[index];
404 } else { // ESC3
405 len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
406 }
407 last_non_zero = i;
408 }
409 }
410 /* if (i <= last_index) */ {
411 int level = block[scan_table[i]];
412 int run = i - last_non_zero - 1;
413 level += 64;
414 if ((level & (~127)) == 0) {
415 const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
416 len += len_tab[index];
417 } else { // ESC3
418 len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
419 }
420 }
421
422 return len;
423}
424
425static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
426 int intra_dc[6], uint8_t **scan_table,
427 PutBitContext *dc_pb,
428 PutBitContext *ac_pb)
429{
430 int i;
431
432 if (scan_table) {
433 if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) {
434 for (i = 0; i < 6; i++)
435 skip_put_bits(&s->pb,
436 mpeg4_get_block_length(s, block[i], i,
437 intra_dc[i], scan_table[i]));
438 } else {
439 /* encode each block */
440 for (i = 0; i < 6; i++)
441 mpeg4_encode_block(s, block[i], i,
442 intra_dc[i], scan_table[i], dc_pb, ac_pb);
443 }
444 } else {
445 if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) {
446 for (i = 0; i < 6; i++)
447 skip_put_bits(&s->pb,
448 mpeg4_get_block_length(s, block[i], i, 0,
449 s->intra_scantable.permutated));
450 } else {
451 /* encode each block */
452 for (i = 0; i < 6; i++)
453 mpeg4_encode_block(s, block[i], i, 0,
454 s->intra_scantable.permutated, dc_pb, ac_pb);
455 }
456 }
457}
458
459static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64],
460 int motion_x, int motion_y, int mb_type)
461{
462 int cbp = 0, i;
463
464 if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
465 int score = 0;
466 const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
467
468 for (i = 0; i < 6; i++) {
469 if (s->coded_score[i] < 0) {
470 score += s->coded_score[i];
471 cbp |= 1 << (5 - i);
472 }
473 }
474
475 if (cbp) {
476 int zero_score = -6;
477 if ((motion_x | motion_y | s->dquant | mb_type) == 0)
478 zero_score -= 4; // 2 * MV + mb_type + cbp bit
479
480 zero_score *= lambda;
481 if (zero_score <= score)
482 cbp = 0;
483 }
484
485 for (i = 0; i < 6; i++) {
486 if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
487 s->block_last_index[i] = -1;
488 s->bdsp.clear_block(s->block[i]);
489 }
490 }
491 } else {
492 for (i = 0; i < 6; i++) {
493 if (s->block_last_index[i] >= 0)
494 cbp |= 1 << (5 - i);
495 }
496 }
497 return cbp;
498}
499
500// FIXME this is duplicated to h263.c
501static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
502
503void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
504 int motion_x, int motion_y)
505{
506 int cbpc, cbpy, pred_x, pred_y;
507 PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
508 PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
509 PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
510 const int interleaved_stats = (s->flags & CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
511
512 if (!s->mb_intra) {
513 int i, cbp;
514
515 if (s->pict_type == AV_PICTURE_TYPE_B) {
516 /* convert from mv_dir to type */
517 static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
518 int mb_type = mb_type_table[s->mv_dir];
519
520 if (s->mb_x == 0) {
521 for (i = 0; i < 2; i++)
522 s->last_mv[i][0][0] =
523 s->last_mv[i][0][1] =
524 s->last_mv[i][1][0] =
525 s->last_mv[i][1][1] = 0;
526 }
527
528 av_assert2(s->dquant >= -2 && s->dquant <= 2);
529 av_assert2((s->dquant & 1) == 0);
530 av_assert2(mb_type >= 0);
531
532 /* nothing to do if this MB was skipped in the next P Frame */
533 if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ...
534 s->skip_count++;
535 s->mv[0][0][0] =
536 s->mv[0][0][1] =
537 s->mv[1][0][0] =
538 s->mv[1][0][1] = 0;
539 s->mv_dir = MV_DIR_FORWARD; // doesn't matter
540 s->qscale -= s->dquant;
541// s->mb_skipped = 1;
542
543 return;
544 }
545
546 cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
547
548 if ((cbp | motion_x | motion_y | mb_type) == 0) {
549 /* direct MB with MV={0,0} */
550 av_assert2(s->dquant == 0);
551
552 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
553
554 if (interleaved_stats) {
555 s->misc_bits++;
556 s->last_bits++;
557 }
558 s->skip_count++;
559 return;
560 }
561
562 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
563 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge
564 put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :)
565 if (cbp)
566 put_bits(&s->pb, 6, cbp);
567
568 if (cbp && mb_type) {
569 if (s->dquant)
570 put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
571 else
572 put_bits(&s->pb, 1, 0);
573 } else
574 s->qscale -= s->dquant;
575
576 if (!s->progressive_sequence) {
577 if (cbp)
578 put_bits(&s->pb, 1, s->interlaced_dct);
579 if (mb_type) // not direct mode
580 put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
581 }
582
583 if (interleaved_stats)
584 s->misc_bits += get_bits_diff(s);
585
586 if (!mb_type) {
587 av_assert2(s->mv_dir & MV_DIRECT);
588 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
589 s->b_count++;
590 s->f_count++;
591 } else {
592 av_assert2(mb_type > 0 && mb_type < 4);
593 if (s->mv_type != MV_TYPE_FIELD) {
594 if (s->mv_dir & MV_DIR_FORWARD) {
595 ff_h263_encode_motion_vector(s,
596 s->mv[0][0][0] - s->last_mv[0][0][0],
597 s->mv[0][0][1] - s->last_mv[0][0][1],
598 s->f_code);
599 s->last_mv[0][0][0] =
600 s->last_mv[0][1][0] = s->mv[0][0][0];
601 s->last_mv[0][0][1] =
602 s->last_mv[0][1][1] = s->mv[0][0][1];
603 s->f_count++;
604 }
605 if (s->mv_dir & MV_DIR_BACKWARD) {
606 ff_h263_encode_motion_vector(s,
607 s->mv[1][0][0] - s->last_mv[1][0][0],
608 s->mv[1][0][1] - s->last_mv[1][0][1],
609 s->b_code);
610 s->last_mv[1][0][0] =
611 s->last_mv[1][1][0] = s->mv[1][0][0];
612 s->last_mv[1][0][1] =
613 s->last_mv[1][1][1] = s->mv[1][0][1];
614 s->b_count++;
615 }
616 } else {
617 if (s->mv_dir & MV_DIR_FORWARD) {
618 put_bits(&s->pb, 1, s->field_select[0][0]);
619 put_bits(&s->pb, 1, s->field_select[0][1]);
620 }
621 if (s->mv_dir & MV_DIR_BACKWARD) {
622 put_bits(&s->pb, 1, s->field_select[1][0]);
623 put_bits(&s->pb, 1, s->field_select[1][1]);
624 }
625 if (s->mv_dir & MV_DIR_FORWARD) {
626 for (i = 0; i < 2; i++) {
627 ff_h263_encode_motion_vector(s,
628 s->mv[0][i][0] - s->last_mv[0][i][0],
629 s->mv[0][i][1] - s->last_mv[0][i][1] / 2,
630 s->f_code);
631 s->last_mv[0][i][0] = s->mv[0][i][0];
632 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
633 }
634 s->f_count++;
635 }
636 if (s->mv_dir & MV_DIR_BACKWARD) {
637 for (i = 0; i < 2; i++) {
638 ff_h263_encode_motion_vector(s,
639 s->mv[1][i][0] - s->last_mv[1][i][0],
640 s->mv[1][i][1] - s->last_mv[1][i][1] / 2,
641 s->b_code);
642 s->last_mv[1][i][0] = s->mv[1][i][0];
643 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
644 }
645 s->b_count++;
646 }
647 }
648 }
649
650 if (interleaved_stats)
651 s->mv_bits += get_bits_diff(s);
652
653 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
654
655 if (interleaved_stats)
656 s->p_tex_bits += get_bits_diff(s);
657 } else { /* s->pict_type==AV_PICTURE_TYPE_B */
658 cbp = get_p_cbp(s, block, motion_x, motion_y);
659
660 if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
661 s->mv_type == MV_TYPE_16X16) {
662 /* check if the B frames can skip it too, as we must skip it
663 * if we skip here why didn't they just compress
664 * the skip-mb bits instead of reusing them ?! */
665 if (s->max_b_frames > 0) {
666 int i;
667 int x, y, offset;
668 uint8_t *p_pic;
669
670 x = s->mb_x * 16;
671 y = s->mb_y * 16;
672
673 offset = x + y * s->linesize;
674 p_pic = s->new_picture.f->data[0] + offset;
675
676 s->mb_skipped = 1;
677 for (i = 0; i < s->max_b_frames; i++) {
678 uint8_t *b_pic;
679 int diff;
680 Picture *pic = s->reordered_input_picture[i + 1];
681
682 if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B)
683 break;
684
685 b_pic = pic->f->data[0] + offset;
686 if (!pic->shared)
687 b_pic += INPLACE_OFFSET;
688
689 if (x + 16 > s->width || y + 16 > s->height) {
690 int x1, y1;
691 int xe = FFMIN(16, s->width - x);
692 int ye = FFMIN(16, s->height - y);
693 diff = 0;
694 for (y1 = 0; y1 < ye; y1++) {
695 for (x1 = 0; x1 < xe; x1++) {
696 diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]);
697 }
698 }
699 diff = diff * 256 / (xe * ye);
700 } else {
701 diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
702 }
703 if (diff > s->qscale * 70) { // FIXME check that 70 is optimal
704 s->mb_skipped = 0;
705 break;
706 }
707 }
708 } else
709 s->mb_skipped = 1;
710
711 if (s->mb_skipped == 1) {
712 /* skip macroblock */
713 put_bits(&s->pb, 1, 1);
714
715 if (interleaved_stats) {
716 s->misc_bits++;
717 s->last_bits++;
718 }
719 s->skip_count++;
720
721 return;
722 }
723 }
724
725 put_bits(&s->pb, 1, 0); /* mb coded */
726 cbpc = cbp & 3;
727 cbpy = cbp >> 2;
728 cbpy ^= 0xf;
729 if (s->mv_type == MV_TYPE_16X16) {
730 if (s->dquant)
731 cbpc += 8;
732 put_bits(&s->pb,
733 ff_h263_inter_MCBPC_bits[cbpc],
734 ff_h263_inter_MCBPC_code[cbpc]);
735
736 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
737 if (s->dquant)
738 put_bits(pb2, 2, dquant_code[s->dquant + 2]);
739
740 if (!s->progressive_sequence) {
741 if (cbp)
742 put_bits(pb2, 1, s->interlaced_dct);
743 put_bits(pb2, 1, 0);
744 }
745
746 if (interleaved_stats)
747 s->misc_bits += get_bits_diff(s);
748
749 /* motion vectors: 16x16 mode */
750 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
751
752 ff_h263_encode_motion_vector(s,
753 motion_x - pred_x,
754 motion_y - pred_y,
755 s->f_code);
756 } else if (s->mv_type == MV_TYPE_FIELD) {
757 if (s->dquant)
758 cbpc += 8;
759 put_bits(&s->pb,
760 ff_h263_inter_MCBPC_bits[cbpc],
761 ff_h263_inter_MCBPC_code[cbpc]);
762
763 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
764 if (s->dquant)
765 put_bits(pb2, 2, dquant_code[s->dquant + 2]);
766
767 av_assert2(!s->progressive_sequence);
768 if (cbp)
769 put_bits(pb2, 1, s->interlaced_dct);
770 put_bits(pb2, 1, 1);
771
772 if (interleaved_stats)
773 s->misc_bits += get_bits_diff(s);
774
775 /* motion vectors: 16x8 interlaced mode */
776 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
777 pred_y /= 2;
778
779 put_bits(&s->pb, 1, s->field_select[0][0]);
780 put_bits(&s->pb, 1, s->field_select[0][1]);
781
782 ff_h263_encode_motion_vector(s,
783 s->mv[0][0][0] - pred_x,
784 s->mv[0][0][1] - pred_y,
785 s->f_code);
786 ff_h263_encode_motion_vector(s,
787 s->mv[0][1][0] - pred_x,
788 s->mv[0][1][1] - pred_y,
789 s->f_code);
790 } else {
791 av_assert2(s->mv_type == MV_TYPE_8X8);
792 put_bits(&s->pb,
793 ff_h263_inter_MCBPC_bits[cbpc + 16],
794 ff_h263_inter_MCBPC_code[cbpc + 16]);
795 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
796
797 if (!s->progressive_sequence && cbp)
798 put_bits(pb2, 1, s->interlaced_dct);
799
800 if (interleaved_stats)
801 s->misc_bits += get_bits_diff(s);
802
803 for (i = 0; i < 4; i++) {
804 /* motion vectors: 8x8 mode*/
805 ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
806
807 ff_h263_encode_motion_vector(s,
808 s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x,
809 s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y,
810 s->f_code);
811 }
812 }
813
814 if (interleaved_stats)
815 s->mv_bits += get_bits_diff(s);
816
817 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
818
819 if (interleaved_stats)
820 s->p_tex_bits += get_bits_diff(s);
821
822 s->f_count++;
823 }
824 } else {
825 int cbp;
826 int dc_diff[6]; // dc values with the dc prediction subtracted
827 int dir[6]; // prediction direction
828 int zigzag_last_index[6];
829 uint8_t *scan_table[6];
830 int i;
831
832 for (i = 0; i < 6; i++)
833 dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
834
835 if (s->flags & CODEC_FLAG_AC_PRED) {
836 s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
837 } else {
838 for (i = 0; i < 6; i++)
839 scan_table[i] = s->intra_scantable.permutated;
840 }
841
842 /* compute cbp */
843 cbp = 0;
844 for (i = 0; i < 6; i++)
845 if (s->block_last_index[i] >= 1)
846 cbp |= 1 << (5 - i);
847
848 cbpc = cbp & 3;
849 if (s->pict_type == AV_PICTURE_TYPE_I) {
850 if (s->dquant)
851 cbpc += 4;
852 put_bits(&s->pb,
853 ff_h263_intra_MCBPC_bits[cbpc],
854 ff_h263_intra_MCBPC_code[cbpc]);
855 } else {
856 if (s->dquant)
857 cbpc += 8;
858 put_bits(&s->pb, 1, 0); /* mb coded */
859 put_bits(&s->pb,
860 ff_h263_inter_MCBPC_bits[cbpc + 4],
861 ff_h263_inter_MCBPC_code[cbpc + 4]);
862 }
863 put_bits(pb2, 1, s->ac_pred);
864 cbpy = cbp >> 2;
865 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
866 if (s->dquant)
867 put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
868
869 if (!s->progressive_sequence)
870 put_bits(dc_pb, 1, s->interlaced_dct);
871
872 if (interleaved_stats)
873 s->misc_bits += get_bits_diff(s);
874
875 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
876
877 if (interleaved_stats)
878 s->i_tex_bits += get_bits_diff(s);
879 s->i_count++;
880
881 /* restore ac coeffs & last_index stuff
882 * if we messed them up with the prediction */
883 if (s->ac_pred)
884 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
885 }
886}
887
888/**
889 * add mpeg4 stuffing bits (01...1)
890 */
891void ff_mpeg4_stuffing(PutBitContext *pbc)
892{
893 int length;
894 put_bits(pbc, 1, 0);
895 length = (-put_bits_count(pbc)) & 7;
896 if (length)
897 put_bits(pbc, length, (1 << length) - 1);
898}
899
900/* must be called before writing the header */
901void ff_set_mpeg4_time(MpegEncContext *s)
902{
903 if (s->pict_type == AV_PICTURE_TYPE_B) {
904 ff_mpeg4_init_direct_mv(s);
905 } else {
906 s->last_time_base = s->time_base;
907 s->time_base = FFUDIV(s->time, s->avctx->time_base.den);
908 }
909}
910
911static void mpeg4_encode_gop_header(MpegEncContext *s)
912{
913 int hours, minutes, seconds;
914 int64_t time;
915
916 put_bits(&s->pb, 16, 0);
917 put_bits(&s->pb, 16, GOP_STARTCODE);
918
919 time = s->current_picture_ptr->f->pts;
920 if (s->reordered_input_picture[1])
921 time = FFMIN(time, s->reordered_input_picture[1]->f->pts);
922 time = time * s->avctx->time_base.num;
923 s->last_time_base = FFUDIV(time, s->avctx->time_base.den);
924
925 seconds = FFUDIV(time, s->avctx->time_base.den);
926 minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
927 hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
928 hours = FFUMOD(hours , 24);
929
930 put_bits(&s->pb, 5, hours);
931 put_bits(&s->pb, 6, minutes);
932 put_bits(&s->pb, 1, 1);
933 put_bits(&s->pb, 6, seconds);
934
935 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
936 put_bits(&s->pb, 1, 0); // broken link == NO
937
938 ff_mpeg4_stuffing(&s->pb);
939}
940
941static void mpeg4_encode_visual_object_header(MpegEncContext *s)
942{
943 int profile_and_level_indication;
944 int vo_ver_id;
945
946 if (s->avctx->profile != FF_PROFILE_UNKNOWN) {
947 profile_and_level_indication = s->avctx->profile << 4;
948 } else if (s->max_b_frames || s->quarter_sample) {
949 profile_and_level_indication = 0xF0; // adv simple
950 } else {
951 profile_and_level_indication = 0x00; // simple
952 }
953
954 if (s->avctx->level != FF_LEVEL_UNKNOWN)
955 profile_and_level_indication |= s->avctx->level;
956 else
957 profile_and_level_indication |= 1; // level 1
958
959 if (profile_and_level_indication >> 4 == 0xF)
960 vo_ver_id = 5;
961 else
962 vo_ver_id = 1;
963
964 // FIXME levels
965
966 put_bits(&s->pb, 16, 0);
967 put_bits(&s->pb, 16, VOS_STARTCODE);
968
969 put_bits(&s->pb, 8, profile_and_level_indication);
970
971 put_bits(&s->pb, 16, 0);
972 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
973
974 put_bits(&s->pb, 1, 1);
975 put_bits(&s->pb, 4, vo_ver_id);
976 put_bits(&s->pb, 3, 1); // priority
977
978 put_bits(&s->pb, 4, 1); // visual obj type== video obj
979
980 put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME
981
982 ff_mpeg4_stuffing(&s->pb);
983}
984
985static void mpeg4_encode_vol_header(MpegEncContext *s,
986 int vo_number,
987 int vol_number)
988{
989 int vo_ver_id;
990
991 if (!CONFIG_MPEG4_ENCODER)
992 return;
993
994 if (s->max_b_frames || s->quarter_sample) {
995 vo_ver_id = 5;
996 s->vo_type = ADV_SIMPLE_VO_TYPE;
997 } else {
998 vo_ver_id = 1;
999 s->vo_type = SIMPLE_VO_TYPE;
1000 }
1001
1002 put_bits(&s->pb, 16, 0);
1003 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
1004 put_bits(&s->pb, 16, 0);
1005 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
1006
1007 put_bits(&s->pb, 1, 0); /* random access vol */
1008 put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
1009 if (s->workaround_bugs & FF_BUG_MS) {
1010 put_bits(&s->pb, 1, 0); /* is obj layer id= no */
1011 } else {
1012 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
1013 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
1014 put_bits(&s->pb, 3, 1); /* is obj layer priority */
1015 }
1016
1017 s->aspect_ratio_info = ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
1018
1019 put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */
1020 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
1021 av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den,
1022 s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den, 255);
1023 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
1024 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
1025 }
1026
1027 if (s->workaround_bugs & FF_BUG_MS) {
1028 put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
1029 } else {
1030 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
1031 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
1032 put_bits(&s->pb, 1, s->low_delay);
1033 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
1034 }
1035
1036 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
1037 put_bits(&s->pb, 1, 1); /* marker bit */
1038
1039 put_bits(&s->pb, 16, s->avctx->time_base.den);
1040 if (s->time_increment_bits < 1)
1041 s->time_increment_bits = 1;
1042 put_bits(&s->pb, 1, 1); /* marker bit */
1043 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
1044 put_bits(&s->pb, 1, 1); /* marker bit */
1045 put_bits(&s->pb, 13, s->width); /* vol width */
1046 put_bits(&s->pb, 1, 1); /* marker bit */
1047 put_bits(&s->pb, 13, s->height); /* vol height */
1048 put_bits(&s->pb, 1, 1); /* marker bit */
1049 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1050 put_bits(&s->pb, 1, 1); /* obmc disable */
1051 if (vo_ver_id == 1)
1052 put_bits(&s->pb, 1, 0); /* sprite enable */
1053 else
1054 put_bits(&s->pb, 2, 0); /* sprite enable */
1055
1056 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
1057 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
1058
1059 if (s->mpeg_quant) {
1060 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
1061 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
1062 }
1063
1064 if (vo_ver_id != 1)
1065 put_bits(&s->pb, 1, s->quarter_sample);
1066 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1067 put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
1068 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1069 if (s->data_partitioning)
1070 put_bits(&s->pb, 1, 0); /* no rvlc */
1071
1072 if (vo_ver_id != 1) {
1073 put_bits(&s->pb, 1, 0); /* newpred */
1074 put_bits(&s->pb, 1, 0); /* reduced res vop */
1075 }
1076 put_bits(&s->pb, 1, 0); /* scalability */
1077
1078 ff_mpeg4_stuffing(&s->pb);
1079
1080 /* user data */
1081 if (!(s->flags & CODEC_FLAG_BITEXACT)) {
1082 put_bits(&s->pb, 16, 0);
1083 put_bits(&s->pb, 16, 0x1B2); /* user_data */
1084 avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1085 }
1086}
1087
1088/* write mpeg4 VOP header */
1089void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
1090{
1091 int time_incr;
1092 int time_div, time_mod;
1093
1094 if (s->pict_type == AV_PICTURE_TYPE_I) {
1095 if (!(s->flags & CODEC_FLAG_GLOBAL_HEADER)) {
1096 if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy
1097 mpeg4_encode_visual_object_header(s);
1098 if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0) // HACK, the reference sw is buggy
1099 mpeg4_encode_vol_header(s, 0, 0);
1100 }
1101 if (!(s->workaround_bugs & FF_BUG_MS))
1102 mpeg4_encode_gop_header(s);
1103 }
1104
1105 s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B;
1106
1107 put_bits(&s->pb, 16, 0); /* vop header */
1108 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1109 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1110
1111 time_div = FFUDIV(s->time, s->avctx->time_base.den);
1112 time_mod = FFUMOD(s->time, s->avctx->time_base.den);
1113 time_incr = time_div - s->last_time_base;
1114 av_assert0(time_incr >= 0);
1115 while (time_incr--)
1116 put_bits(&s->pb, 1, 1);
1117
1118 put_bits(&s->pb, 1, 0);
1119
1120 put_bits(&s->pb, 1, 1); /* marker */
1121 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1122 put_bits(&s->pb, 1, 1); /* marker */
1123 put_bits(&s->pb, 1, 1); /* vop coded */
1124 if (s->pict_type == AV_PICTURE_TYPE_P) {
1125 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1126 }
1127 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1128 if (!s->progressive_sequence) {
1129 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
1130 put_bits(&s->pb, 1, s->alternate_scan);
1131 }
1132 // FIXME sprite stuff
1133
1134 put_bits(&s->pb, 5, s->qscale);
1135
1136 if (s->pict_type != AV_PICTURE_TYPE_I)
1137 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1138 if (s->pict_type == AV_PICTURE_TYPE_B)
1139 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1140}
1141
1142static av_cold void init_uni_dc_tab(void)
1143{
1144 int level, uni_code, uni_len;
1145
1146 for (level = -256; level < 256; level++) {
1147 int size, v, l;
1148 /* find number of bits */
1149 size = 0;
1150 v = abs(level);
1151 while (v) {
1152 v >>= 1;
1153 size++;
1154 }
1155
1156 if (level < 0)
1157 l = (-level) ^ ((1 << size) - 1);
1158 else
1159 l = level;
1160
1161 /* luminance */
1162 uni_code = ff_mpeg4_DCtab_lum[size][0];
1163 uni_len = ff_mpeg4_DCtab_lum[size][1];
1164
1165 if (size > 0) {
1166 uni_code <<= size;
1167 uni_code |= l;
1168 uni_len += size;
1169 if (size > 8) {
1170 uni_code <<= 1;
1171 uni_code |= 1;
1172 uni_len++;
1173 }
1174 }
1175 uni_DCtab_lum_bits[level + 256] = uni_code;
1176 uni_DCtab_lum_len[level + 256] = uni_len;
1177
1178 /* chrominance */
1179 uni_code = ff_mpeg4_DCtab_chrom[size][0];
1180 uni_len = ff_mpeg4_DCtab_chrom[size][1];
1181
1182 if (size > 0) {
1183 uni_code <<= size;
1184 uni_code |= l;
1185 uni_len += size;
1186 if (size > 8) {
1187 uni_code <<= 1;
1188 uni_code |= 1;
1189 uni_len++;
1190 }
1191 }
1192 uni_DCtab_chrom_bits[level + 256] = uni_code;
1193 uni_DCtab_chrom_len[level + 256] = uni_len;
1194 }
1195}
1196
1197static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1198 uint8_t *len_tab)
1199{
1200 int slevel, run, last;
1201
1202 av_assert0(MAX_LEVEL >= 64);
1203 av_assert0(MAX_RUN >= 63);
1204
1205 for (slevel = -64; slevel < 64; slevel++) {
1206 if (slevel == 0)
1207 continue;
1208 for (run = 0; run < 64; run++) {
1209 for (last = 0; last <= 1; last++) {
1210 const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64);
1211 int level = slevel < 0 ? -slevel : slevel;
1212 int sign = slevel < 0 ? 1 : 0;
1213 int bits, len, code;
1214 int level1, run1;
1215
1216 len_tab[index] = 100;
1217
1218 /* ESC0 */
1219 code = get_rl_index(rl, last, run, level);
1220 bits = rl->table_vlc[code][0];
1221 len = rl->table_vlc[code][1];
1222 bits = bits * 2 + sign;
1223 len++;
1224
1225 if (code != rl->n && len < len_tab[index]) {
1226 bits_tab[index] = bits;
1227 len_tab[index] = len;
1228 }
1229 /* ESC1 */
1230 bits = rl->table_vlc[rl->n][0];
1231 len = rl->table_vlc[rl->n][1];
1232 bits = bits * 2;
1233 len++; // esc1
1234 level1 = level - rl->max_level[last][run];
1235 if (level1 > 0) {
1236 code = get_rl_index(rl, last, run, level1);
1237 bits <<= rl->table_vlc[code][1];
1238 len += rl->table_vlc[code][1];
1239 bits += rl->table_vlc[code][0];
1240 bits = bits * 2 + sign;
1241 len++;
1242
1243 if (code != rl->n && len < len_tab[index]) {
1244 bits_tab[index] = bits;
1245 len_tab[index] = len;
1246 }
1247 }
1248 /* ESC2 */
1249 bits = rl->table_vlc[rl->n][0];
1250 len = rl->table_vlc[rl->n][1];
1251 bits = bits * 4 + 2;
1252 len += 2; // esc2
1253 run1 = run - rl->max_run[last][level] - 1;
1254 if (run1 >= 0) {
1255 code = get_rl_index(rl, last, run1, level);
1256 bits <<= rl->table_vlc[code][1];
1257 len += rl->table_vlc[code][1];
1258 bits += rl->table_vlc[code][0];
1259 bits = bits * 2 + sign;
1260 len++;
1261
1262 if (code != rl->n && len < len_tab[index]) {
1263 bits_tab[index] = bits;
1264 len_tab[index] = len;
1265 }
1266 }
1267 /* ESC3 */
1268 bits = rl->table_vlc[rl->n][0];
1269 len = rl->table_vlc[rl->n][1];
1270 bits = bits * 4 + 3;
1271 len += 2; // esc3
1272 bits = bits * 2 + last;
1273 len++;
1274 bits = bits * 64 + run;
1275 len += 6;
1276 bits = bits * 2 + 1;
1277 len++; // marker
1278 bits = bits * 4096 + (slevel & 0xfff);
1279 len += 12;
1280 bits = bits * 2 + 1;
1281 len++; // marker
1282
1283 if (len < len_tab[index]) {
1284 bits_tab[index] = bits;
1285 len_tab[index] = len;
1286 }
1287 }
1288 }
1289 }
1290}
1291
1292static av_cold int encode_init(AVCodecContext *avctx)
1293{
1294 MpegEncContext *s = avctx->priv_data;
1295 int ret;
1296 static int done = 0;
1297
1298 if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
1299 av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
1300 return AVERROR(EINVAL);
1301 }
1302
1303 if ((ret = ff_mpv_encode_init(avctx)) < 0)
1304 return ret;
1305
1306 if (!done) {
1307 done = 1;
1308
1309 init_uni_dc_tab();
1310
1311 ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
1312
1313 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1314 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1315 }
1316
1317 s->min_qcoeff = -2048;
1318 s->max_qcoeff = 2047;
1319 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1320 s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64;
1321 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1322 s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64;
1323 s->luma_dc_vlc_length = uni_DCtab_lum_len;
1324 s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1;
1325 s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table;
1326 s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table;
1327
1328 if (s->flags & CODEC_FLAG_GLOBAL_HEADER) {
1329 s->avctx->extradata = av_malloc(1024);
1330 init_put_bits(&s->pb, s->avctx->extradata, 1024);
1331
1332 if (!(s->workaround_bugs & FF_BUG_MS))
1333 mpeg4_encode_visual_object_header(s);
1334 mpeg4_encode_vol_header(s, 0, 0);
1335
1336// ff_mpeg4_stuffing(&s->pb); ?
1337 flush_put_bits(&s->pb);
1338 s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3;
1339 }
1340 return 0;
1341}
1342
1343void ff_mpeg4_init_partitions(MpegEncContext *s)
1344{
1345 uint8_t *start = put_bits_ptr(&s->pb);
1346 uint8_t *end = s->pb.buf_end;
1347 int size = end - start;
1348 int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
1349 int tex_size = (size - 2 * pb_size) & (~3);
1350
1351 set_put_bits_buffer_size(&s->pb, pb_size);
1352 init_put_bits(&s->tex_pb, start + pb_size, tex_size);
1353 init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
1354}
1355
1356void ff_mpeg4_merge_partitions(MpegEncContext *s)
1357{
1358 const int pb2_len = put_bits_count(&s->pb2);
1359 const int tex_pb_len = put_bits_count(&s->tex_pb);
1360 const int bits = put_bits_count(&s->pb);
1361
1362 if (s->pict_type == AV_PICTURE_TYPE_I) {
1363 put_bits(&s->pb, 19, DC_MARKER);
1364 s->misc_bits += 19 + pb2_len + bits - s->last_bits;
1365 s->i_tex_bits += tex_pb_len;
1366 } else {
1367 put_bits(&s->pb, 17, MOTION_MARKER);
1368 s->misc_bits += 17 + pb2_len;
1369 s->mv_bits += bits - s->last_bits;
1370 s->p_tex_bits += tex_pb_len;
1371 }
1372
1373 flush_put_bits(&s->pb2);
1374 flush_put_bits(&s->tex_pb);
1375
1376 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1377 avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len);
1378 avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1379 s->last_bits = put_bits_count(&s->pb);
1380}
1381
1382void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1383{
1384 int mb_num_bits = av_log2(s->mb_num - 1) + 1;
1385
1386 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1387 put_bits(&s->pb, 1, 1);
1388
1389 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width);
1390 put_bits(&s->pb, s->quant_precision, s->qscale);
1391 put_bits(&s->pb, 1, 0); /* no HEC */
1392}
1393
1394#define OFFSET(x) offsetof(MpegEncContext, x)
1395#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1396static const AVOption options[] = {
1397 { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1398 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1399 FF_MPV_COMMON_OPTS
1400 { NULL },
1401};
1402
1403static const AVClass mpeg4enc_class = {
1404 .class_name = "MPEG4 encoder",
1405 .item_name = av_default_item_name,
1406 .option = options,
1407 .version = LIBAVUTIL_VERSION_INT,
1408};
1409
1410AVCodec ff_mpeg4_encoder = {
1411 .name = "mpeg4",
1412 .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1413 .type = AVMEDIA_TYPE_VIDEO,
1414 .id = AV_CODEC_ID_MPEG4,
1415 .priv_data_size = sizeof(MpegEncContext),
1416 .init = encode_init,
1417 .encode2 = ff_mpv_encode_picture,
1418 .close = ff_mpv_encode_end,
1419 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
1420 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1421 .priv_class = &mpeg4enc_class,
1422};
ffmpeg Piment Noir Debian package repository