configure: Don't use symlinks for creating the out of tree makefile
[libav.git] / libavcodec / mpeg4videoenc.c
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1/*
2 * MPEG4 encoder.
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
5 *
2912e87a 6 * This file is part of Libav.
ca334dd1 7 *
2912e87a 8 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 13 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 19 * License along with Libav; if not, write to the Free Software
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20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
6fee1b90 23#include "libavutil/attributes.h"
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24#include "libavutil/log.h"
25#include "libavutil/opt.h"
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26#include "mpegvideo.h"
27#include "h263.h"
28#include "mpeg4video.h"
29
30//The uni_DCtab_* tables below contain unified bits+length tables to encode DC
31//differences in mpeg4. Unified in the sense that the specification specifies
32//this encoding in several steps.
33static uint8_t uni_DCtab_lum_len[512];
34static uint8_t uni_DCtab_chrom_len[512];
35static uint16_t uni_DCtab_lum_bits[512];
36static uint16_t uni_DCtab_chrom_bits[512];
37
38//unified encoding tables for run length encoding of coefficients
39//unified in the sense that the specification specifies the encoding in several steps.
40static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2];
41static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2];
42static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2];
43static uint8_t uni_mpeg4_inter_rl_len [64*64*2*2];
44//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
45//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
46#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
47
48/* mpeg4
49inter
50max level: 24/6
51max run: 53/63
52
53intra
54max level: 53/16
55max run: 29/41
56*/
57
58
59/**
49bd8e4b 60 * Return the number of bits that encoding the 8x8 block in block would need.
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61 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
62 */
88bd7fdc 63static inline int get_block_rate(MpegEncContext * s, int16_t block[64], int block_last_index, uint8_t scantable[64]){
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64 int last=0;
65 int j;
66 int rate=0;
67
68 for(j=1; j<=block_last_index; j++){
69 const int index= scantable[j];
70 int level= block[index];
71 if(level){
72 level+= 64;
73 if((level&(~127)) == 0){
74 if(j<block_last_index) rate+= s->intra_ac_vlc_length [UNI_AC_ENC_INDEX(j-last-1, level)];
75 else rate+= s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j-last-1, level)];
76 }else
77 rate += s->ac_esc_length;
78
79 last= j;
80 }
81 }
82
83 return rate;
84}
85
86
87/**
49bd8e4b 88 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
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89 * This function also restores s->block_last_index.
90 * @param[in,out] block MB coefficients, these will be restored
91 * @param[in] dir ac prediction direction for each 8x8 block
92 * @param[out] st scantable for each 8x8 block
511cf612 93 * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
ca334dd1 94 */
88bd7fdc 95static inline void restore_ac_coeffs(MpegEncContext * s, int16_t block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
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96{
97 int i, n;
98 memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6);
99
100 for(n=0; n<6; n++){
101 int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
102
103 st[n]= s->intra_scantable.permutated;
104 if(dir[n]){
105 /* top prediction */
106 for(i=1; i<8; i++){
107 block[n][s->dsp.idct_permutation[i ]] = ac_val[i+8];
108 }
109 }else{
110 /* left prediction */
111 for(i=1; i<8; i++){
112 block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i ];
113 }
114 }
115 }
116}
117
118/**
49bd8e4b 119 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
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120 * This function will also update s->block_last_index and s->ac_val.
121 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
122 * @param[in] dir ac prediction direction for each 8x8 block
123 * @param[out] st scantable for each 8x8 block
511cf612 124 * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
ca334dd1 125 */
88bd7fdc 126static inline int decide_ac_pred(MpegEncContext * s, int16_t block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
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127{
128 int score= 0;
129 int i, n;
759001c5 130 int8_t * const qscale_table = s->current_picture.qscale_table;
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131
132 memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6);
133
134 for(n=0; n<6; n++){
135 int16_t *ac_val, *ac_val1;
136
137 score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated);
138
139 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
140 ac_val1= ac_val;
141 if(dir[n]){
142 const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
143 /* top prediction */
144 ac_val-= s->block_wrap[n]*16;
145 if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
146 /* same qscale */
147 for(i=1; i<8; i++){
148 const int level= block[n][s->dsp.idct_permutation[i ]];
149 block[n][s->dsp.idct_permutation[i ]] = level - ac_val[i+8];
150 ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
151 ac_val1[i+8]= level;
152 }
153 }else{
154 /* different qscale, we must rescale */
155 for(i=1; i<8; i++){
156 const int level= block[n][s->dsp.idct_permutation[i ]];
157 block[n][s->dsp.idct_permutation[i ]] = level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
158 ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
159 ac_val1[i+8]= level;
160 }
161 }
162 st[n]= s->intra_h_scantable.permutated;
163 }else{
164 const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
165 /* left prediction */
166 ac_val-= 16;
167 if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
168 /* same qscale */
169 for(i=1; i<8; i++){
170 const int level= block[n][s->dsp.idct_permutation[i<<3]];
171 block[n][s->dsp.idct_permutation[i<<3]]= level - ac_val[i];
172 ac_val1[i ]= level;
173 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
174 }
175 }else{
176 /* different qscale, we must rescale */
177 for(i=1; i<8; i++){
178 const int level= block[n][s->dsp.idct_permutation[i<<3]];
179 block[n][s->dsp.idct_permutation[i<<3]]= level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
180 ac_val1[i ]= level;
181 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
182 }
183 }
184 st[n]= s->intra_v_scantable.permutated;
185 }
186
187 for(i=63; i>0; i--) //FIXME optimize
188 if(block[n][ st[n][i] ]) break;
189 s->block_last_index[n]= i;
190
191 score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
192 }
193
194 if(score < 0){
195 return 1;
196 }else{
197 restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
198 return 0;
199 }
200}
201
202/**
203 * modify mb_type & qscale so that encoding is acually possible in mpeg4
204 */
205void ff_clean_mpeg4_qscales(MpegEncContext *s){
206 int i;
759001c5 207 int8_t * const qscale_table = s->current_picture.qscale_table;
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208
209 ff_clean_h263_qscales(s);
210
975a1447 211 if(s->pict_type== AV_PICTURE_TYPE_B){
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212 int odd=0;
213 /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */
214
215 for(i=0; i<s->mb_num; i++){
216 int mb_xy= s->mb_index2xy[i];
217 odd += qscale_table[mb_xy]&1;
218 }
219
220 if(2*odd > s->mb_num) odd=1;
221 else odd=0;
222
223 for(i=0; i<s->mb_num; i++){
224 int mb_xy= s->mb_index2xy[i];
225 if((qscale_table[mb_xy]&1) != odd)
226 qscale_table[mb_xy]++;
227 if(qscale_table[mb_xy] > 31)
228 qscale_table[mb_xy]= 31;
229 }
230
231 for(i=1; i<s->mb_num; i++){
232 int mb_xy= s->mb_index2xy[i];
233 if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){
234 s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR;
235 }
236 }
237 }
238}
239
240
241/**
58c42af7 242 * Encode the dc value.
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243 * @param n block index (0-3 are luma, 4-5 are chroma)
244 */
245static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
246{
247#if 1
49d2d1c3 248 /* DC will overflow if level is outside the [-255,255] range. */
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249 level+=256;
250 if (n < 4) {
251 /* luminance */
252 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
253 } else {
254 /* chrominance */
255 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
256 }
257#else
258 int size, v;
259 /* find number of bits */
260 size = 0;
261 v = abs(level);
262 while (v) {
263 v >>= 1;
264 size++;
265 }
266
267 if (n < 4) {
268 /* luminance */
05b858b0 269 put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
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270 } else {
271 /* chrominance */
05b858b0 272 put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
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273 }
274
275 /* encode remaining bits */
276 if (size > 0) {
277 if (level < 0)
278 level = (-level) ^ ((1 << size) - 1);
279 put_bits(&s->pb, size, level);
280 if (size > 8)
281 put_bits(&s->pb, 1, 1);
282 }
283#endif
284}
285
286static inline int mpeg4_get_dc_length(int level, int n){
287 if (n < 4) {
288 return uni_DCtab_lum_len[level + 256];
289 } else {
290 return uni_DCtab_chrom_len[level + 256];
291 }
292}
293
294/**
58c42af7 295 * Encode an 8x8 block.
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296 * @param n block index (0-3 are luma, 4-5 are chroma)
297 */
88bd7fdc 298static inline void mpeg4_encode_block(MpegEncContext * s, int16_t * block, int n, int intra_dc,
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299 uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
300{
301 int i, last_non_zero;
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302 uint32_t *bits_tab;
303 uint8_t *len_tab;
304 const int last_index = s->block_last_index[n];
305
306 if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
307 /* mpeg4 based DC predictor */
308 mpeg4_encode_dc(dc_pb, intra_dc, n);
309 if(last_index<1) return;
310 i = 1;
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311 bits_tab= uni_mpeg4_intra_rl_bits;
312 len_tab = uni_mpeg4_intra_rl_len;
313 } else {
314 if(last_index<0) return;
315 i = 0;
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316 bits_tab= uni_mpeg4_inter_rl_bits;
317 len_tab = uni_mpeg4_inter_rl_len;
318 }
319
320 /* AC coefs */
321 last_non_zero = i - 1;
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322 for (; i < last_index; i++) {
323 int level = block[ scan_table[i] ];
324 if (level) {
325 int run = i - last_non_zero - 1;
326 level+=64;
327 if((level&(~127)) == 0){
328 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
329 put_bits(ac_pb, len_tab[index], bits_tab[index]);
330 }else{ //ESC3
331 put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(0<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
332 }
333 last_non_zero = i;
334 }
335 }
336 /*if(i<=last_index)*/{
337 int level = block[ scan_table[i] ];
338 int run = i - last_non_zero - 1;
339 level+=64;
340 if((level&(~127)) == 0){
341 const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
342 put_bits(ac_pb, len_tab[index], bits_tab[index]);
343 }else{ //ESC3
344 put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(1<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
345 }
346 }
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347}
348
88bd7fdc 349static int mpeg4_get_block_length(MpegEncContext * s, int16_t * block, int n, int intra_dc,
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350 uint8_t *scan_table)
351{
352 int i, last_non_zero;
353 uint8_t *len_tab;
354 const int last_index = s->block_last_index[n];
355 int len=0;
356
357 if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
358 /* mpeg4 based DC predictor */
359 len += mpeg4_get_dc_length(intra_dc, n);
360 if(last_index<1) return len;
361 i = 1;
362 len_tab = uni_mpeg4_intra_rl_len;
363 } else {
364 if(last_index<0) return 0;
365 i = 0;
366 len_tab = uni_mpeg4_inter_rl_len;
367 }
368
369 /* AC coefs */
370 last_non_zero = i - 1;
371 for (; i < last_index; i++) {
372 int level = block[ scan_table[i] ];
373 if (level) {
374 int run = i - last_non_zero - 1;
375 level+=64;
376 if((level&(~127)) == 0){
377 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
378 len += len_tab[index];
379 }else{ //ESC3
380 len += 7+2+1+6+1+12+1;
381 }
382 last_non_zero = i;
383 }
384 }
385 /*if(i<=last_index)*/{
386 int level = block[ scan_table[i] ];
387 int run = i - last_non_zero - 1;
388 level+=64;
389 if((level&(~127)) == 0){
390 const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
391 len += len_tab[index];
392 }else{ //ESC3
393 len += 7+2+1+6+1+12+1;
394 }
395 }
396
397 return len;
398}
399
88bd7fdc 400static inline void mpeg4_encode_blocks(MpegEncContext * s, int16_t block[6][64], int intra_dc[6],
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401 uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){
402 int i;
403
404 if(scan_table){
405 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
406 for (i = 0; i < 6; i++) {
407 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, intra_dc[i], scan_table[i]));
408 }
409 }else{
410 /* encode each block */
411 for (i = 0; i < 6; i++) {
412 mpeg4_encode_block(s, block[i], i, intra_dc[i], scan_table[i], dc_pb, ac_pb);
413 }
414 }
415 }else{
416 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
417 for (i = 0; i < 6; i++) {
418 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, 0, s->intra_scantable.permutated));
419 }
420 }else{
421 /* encode each block */
422 for (i = 0; i < 6; i++) {
423 mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, dc_pb, ac_pb);
424 }
425 }
426 }
427}
428
88bd7fdc 429static inline int get_b_cbp(MpegEncContext * s, int16_t block[6][64],
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430 int motion_x, int motion_y, int mb_type)
431{
432 int cbp = 0, i;
433
af3d804f 434 if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
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435 int score = 0;
436 const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
437
438 for (i = 0; i < 6; i++)
439 if (s->coded_score[i] < 0) {
440 score += s->coded_score[i];
441 cbp |= 1 << (5 - i);
442 }
443
444 if (cbp) {
445 int zero_score = -6;
446 if ((motion_x | motion_y | s->dquant | mb_type) == 0)
447 zero_score -= 4; //2*MV + mb_type + cbp bit
448
449 zero_score *= lambda;
450 if (zero_score <= score)
451 cbp = 0;
452 }
453
454 for (i = 0; i < 6; i++) {
455 if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
456 s->block_last_index[i] = -1;
457 s->dsp.clear_block(s->block[i]);
458 }
459 }
460 } else {
461 for (i = 0; i < 6; i++) {
462 if (s->block_last_index[i] >= 0)
463 cbp |= 1 << (5 - i);
464 }
465 }
466 return cbp;
467}
468
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469//FIXME this is duplicated to h263.c
470static const int dquant_code[5]= {1,0,9,2,3};
471
6f13a371 472void ff_mpeg4_encode_mb(MpegEncContext * s,
88bd7fdc 473 int16_t block[6][64],
6f13a371 474 int motion_x, int motion_y)
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475{
476 int cbpc, cbpy, pred_x, pred_y;
477 PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
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478 PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
479 PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
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480 const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
481
482 if (!s->mb_intra) {
483 int i, cbp;
484
975a1447 485 if(s->pict_type==AV_PICTURE_TYPE_B){
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486 static const int mb_type_table[8]= {-1, 3, 2, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
487 int mb_type= mb_type_table[s->mv_dir];
488
489 if(s->mb_x==0){
490 for(i=0; i<2; i++){
491 s->last_mv[i][0][0]=
492 s->last_mv[i][0][1]=
493 s->last_mv[i][1][0]=
494 s->last_mv[i][1][1]= 0;
495 }
496 }
497
498 assert(s->dquant>=-2 && s->dquant<=2);
499 assert((s->dquant&1)==0);
500 assert(mb_type>=0);
501
502 /* nothing to do if this MB was skipped in the next P Frame */
759001c5 503 if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { //FIXME avoid DCT & ...
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504 s->skip_count++;
505 s->mv[0][0][0]=
506 s->mv[0][0][1]=
507 s->mv[1][0][0]=
508 s->mv[1][0][1]= 0;
509 s->mv_dir= MV_DIR_FORWARD; //doesn't matter
510 s->qscale -= s->dquant;
511// s->mb_skipped=1;
512
513 return;
514 }
515
516 cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type);
517
518 if ((cbp | motion_x | motion_y | mb_type) ==0) {
519 /* direct MB with MV={0,0} */
520 assert(s->dquant==0);
521
522 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
523
524 if(interleaved_stats){
525 s->misc_bits++;
526 s->last_bits++;
527 }
528 s->skip_count++;
529 return;
530 }
531
532 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
533 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
534 put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :)
535 if(cbp) put_bits(&s->pb, 6, cbp);
536
537 if(cbp && mb_type){
538 if(s->dquant)
539 put_bits(&s->pb, 2, (s->dquant>>2)+3);
540 else
541 put_bits(&s->pb, 1, 0);
542 }else
543 s->qscale -= s->dquant;
544
545 if(!s->progressive_sequence){
546 if(cbp)
547 put_bits(&s->pb, 1, s->interlaced_dct);
548 if(mb_type) // not direct mode
549 put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
550 }
551
552 if(interleaved_stats){
553 s->misc_bits+= get_bits_diff(s);
554 }
555
556 if(mb_type == 0){
557 assert(s->mv_dir & MV_DIRECT);
558 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
559 s->b_count++;
560 s->f_count++;
561 }else{
562 assert(mb_type > 0 && mb_type < 4);
563 if(s->mv_type != MV_TYPE_FIELD){
564 if(s->mv_dir & MV_DIR_FORWARD){
565 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0],
566 s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
567 s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0];
568 s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1];
569 s->f_count++;
570 }
571 if(s->mv_dir & MV_DIR_BACKWARD){
572 ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0],
573 s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
574 s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0];
575 s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1];
576 s->b_count++;
577 }
578 }else{
579 if(s->mv_dir & MV_DIR_FORWARD){
580 put_bits(&s->pb, 1, s->field_select[0][0]);
581 put_bits(&s->pb, 1, s->field_select[0][1]);
582 }
583 if(s->mv_dir & MV_DIR_BACKWARD){
584 put_bits(&s->pb, 1, s->field_select[1][0]);
585 put_bits(&s->pb, 1, s->field_select[1][1]);
586 }
587 if(s->mv_dir & MV_DIR_FORWARD){
588 for(i=0; i<2; i++){
589 ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0] ,
590 s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code);
591 s->last_mv[0][i][0]= s->mv[0][i][0];
592 s->last_mv[0][i][1]= s->mv[0][i][1]*2;
593 }
594 s->f_count++;
595 }
596 if(s->mv_dir & MV_DIR_BACKWARD){
597 for(i=0; i<2; i++){
598 ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0] ,
599 s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code);
600 s->last_mv[1][i][0]= s->mv[1][i][0];
601 s->last_mv[1][i][1]= s->mv[1][i][1]*2;
602 }
603 s->b_count++;
604 }
605 }
606 }
607
608 if(interleaved_stats){
609 s->mv_bits+= get_bits_diff(s);
610 }
611
612 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
613
614 if(interleaved_stats){
615 s->p_tex_bits+= get_bits_diff(s);
616 }
617
975a1447 618 }else{ /* s->pict_type==AV_PICTURE_TYPE_B */
ca334dd1
MN
619 cbp= get_p_cbp(s, block, motion_x, motion_y);
620
621 if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) {
622 /* check if the B frames can skip it too, as we must skip it if we skip here
623 why didn't they just compress the skip-mb bits instead of reusing them ?! */
624 if(s->max_b_frames>0){
625 int i;
626 int x,y, offset;
627 uint8_t *p_pic;
628
629 x= s->mb_x*16;
630 y= s->mb_y*16;
631 if(x+16 > s->width) x= s->width-16;
632 if(y+16 > s->height) y= s->height-16;
633
634 offset= x + y*s->linesize;
657ccb5a 635 p_pic = s->new_picture.f.data[0] + offset;
ca334dd1
MN
636
637 s->mb_skipped=1;
638 for(i=0; i<s->max_b_frames; i++){
639 uint8_t *b_pic;
640 int diff;
641 Picture *pic= s->reordered_input_picture[i+1];
642
657ccb5a
DB
643 if (pic == NULL || pic->f.pict_type != AV_PICTURE_TYPE_B)
644 break;
ca334dd1 645
657ccb5a 646 b_pic = pic->f.data[0] + offset;
759001c5 647 if (!pic->shared)
ca334dd1
MN
648 b_pic+= INPLACE_OFFSET;
649 diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
650 if(diff>s->qscale*70){ //FIXME check that 70 is optimal
651 s->mb_skipped=0;
652 break;
653 }
654 }
655 }else
656 s->mb_skipped=1;
657
658 if(s->mb_skipped==1){
659 /* skip macroblock */
660 put_bits(&s->pb, 1, 1);
661
662 if(interleaved_stats){
663 s->misc_bits++;
664 s->last_bits++;
665 }
666 s->skip_count++;
667
668 return;
669 }
670 }
671
672 put_bits(&s->pb, 1, 0); /* mb coded */
673 cbpc = cbp & 3;
674 cbpy = cbp >> 2;
675 cbpy ^= 0xf;
676 if(s->mv_type==MV_TYPE_16X16){
677 if(s->dquant) cbpc+= 8;
678 put_bits(&s->pb,
101ada9a
MN
679 ff_h263_inter_MCBPC_bits[cbpc],
680 ff_h263_inter_MCBPC_code[cbpc]);
ca334dd1 681
101ada9a 682 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
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683 if(s->dquant)
684 put_bits(pb2, 2, dquant_code[s->dquant+2]);
685
686 if(!s->progressive_sequence){
687 if(cbp)
688 put_bits(pb2, 1, s->interlaced_dct);
689 put_bits(pb2, 1, 0);
690 }
691
692 if(interleaved_stats){
693 s->misc_bits+= get_bits_diff(s);
694 }
695
696 /* motion vectors: 16x16 mode */
ddce8953 697 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
ca334dd1
MN
698
699 ff_h263_encode_motion_vector(s, motion_x - pred_x,
700 motion_y - pred_y, s->f_code);
701 }else if(s->mv_type==MV_TYPE_FIELD){
702 if(s->dquant) cbpc+= 8;
703 put_bits(&s->pb,
101ada9a
MN
704 ff_h263_inter_MCBPC_bits[cbpc],
705 ff_h263_inter_MCBPC_code[cbpc]);
ca334dd1 706
101ada9a 707 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
ca334dd1
MN
708 if(s->dquant)
709 put_bits(pb2, 2, dquant_code[s->dquant+2]);
710
711 assert(!s->progressive_sequence);
712 if(cbp)
713 put_bits(pb2, 1, s->interlaced_dct);
714 put_bits(pb2, 1, 1);
715
716 if(interleaved_stats){
717 s->misc_bits+= get_bits_diff(s);
718 }
719
720 /* motion vectors: 16x8 interlaced mode */
ddce8953 721 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
ca334dd1
MN
722 pred_y /=2;
723
724 put_bits(&s->pb, 1, s->field_select[0][0]);
725 put_bits(&s->pb, 1, s->field_select[0][1]);
726
727 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x,
728 s->mv[0][0][1] - pred_y, s->f_code);
729 ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x,
730 s->mv[0][1][1] - pred_y, s->f_code);
731 }else{
732 assert(s->mv_type==MV_TYPE_8X8);
733 put_bits(&s->pb,
101ada9a
MN
734 ff_h263_inter_MCBPC_bits[cbpc+16],
735 ff_h263_inter_MCBPC_code[cbpc+16]);
736 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
ca334dd1
MN
737
738 if(!s->progressive_sequence){
739 if(cbp)
740 put_bits(pb2, 1, s->interlaced_dct);
741 }
742
743 if(interleaved_stats){
744 s->misc_bits+= get_bits_diff(s);
745 }
746
747 for(i=0; i<4; i++){
748 /* motion vectors: 8x8 mode*/
ddce8953 749 ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
ca334dd1 750
759001c5
AK
751 ff_h263_encode_motion_vector(s, s->current_picture.motion_val[0][ s->block_index[i] ][0] - pred_x,
752 s->current_picture.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code);
ca334dd1
MN
753 }
754 }
755
756 if(interleaved_stats){
757 s->mv_bits+= get_bits_diff(s);
758 }
759
760 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
761
762 if(interleaved_stats){
763 s->p_tex_bits+= get_bits_diff(s);
764 }
765 s->f_count++;
766 }
767 } else {
768 int cbp;
769 int dc_diff[6]; //dc values with the dc prediction subtracted
770 int dir[6]; //prediction direction
771 int zigzag_last_index[6];
772 uint8_t *scan_table[6];
773 int i;
774
775 for(i=0; i<6; i++){
776 dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
777 }
778
779 if(s->flags & CODEC_FLAG_AC_PRED){
780 s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
781 }else{
782 for(i=0; i<6; i++)
783 scan_table[i]= s->intra_scantable.permutated;
784 }
785
786 /* compute cbp */
787 cbp = 0;
788 for (i = 0; i < 6; i++) {
789 if (s->block_last_index[i] >= 1)
790 cbp |= 1 << (5 - i);
791 }
792
793 cbpc = cbp & 3;
975a1447 794 if (s->pict_type == AV_PICTURE_TYPE_I) {
ca334dd1
MN
795 if(s->dquant) cbpc+=4;
796 put_bits(&s->pb,
101ada9a
MN
797 ff_h263_intra_MCBPC_bits[cbpc],
798 ff_h263_intra_MCBPC_code[cbpc]);
ca334dd1
MN
799 } else {
800 if(s->dquant) cbpc+=8;
801 put_bits(&s->pb, 1, 0); /* mb coded */
802 put_bits(&s->pb,
101ada9a
MN
803 ff_h263_inter_MCBPC_bits[cbpc + 4],
804 ff_h263_inter_MCBPC_code[cbpc + 4]);
ca334dd1
MN
805 }
806 put_bits(pb2, 1, s->ac_pred);
807 cbpy = cbp >> 2;
101ada9a 808 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
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809 if(s->dquant)
810 put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
811
812 if(!s->progressive_sequence){
813 put_bits(dc_pb, 1, s->interlaced_dct);
814 }
815
816 if(interleaved_stats){
817 s->misc_bits+= get_bits_diff(s);
818 }
819
820 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
821
822 if(interleaved_stats){
823 s->i_tex_bits+= get_bits_diff(s);
824 }
825 s->i_count++;
826
827 /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
828 if(s->ac_pred)
829 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
830 }
831}
832
833/**
834 * add mpeg4 stuffing bits (01...1)
835 */
836void ff_mpeg4_stuffing(PutBitContext * pbc)
837{
838 int length;
839 put_bits(pbc, 1, 0);
840 length= (-put_bits_count(pbc))&7;
841 if(length) put_bits(pbc, length, (1<<length)-1);
842}
843
844/* must be called before writing the header */
845void ff_set_mpeg4_time(MpegEncContext * s){
975a1447 846 if(s->pict_type==AV_PICTURE_TYPE_B){
ca334dd1
MN
847 ff_mpeg4_init_direct_mv(s);
848 }else{
849 s->last_time_base= s->time_base;
850 s->time_base= s->time/s->avctx->time_base.den;
851 }
852}
853
854static void mpeg4_encode_gop_header(MpegEncContext * s){
855 int hours, minutes, seconds;
856 int64_t time;
857
858 put_bits(&s->pb, 16, 0);
859 put_bits(&s->pb, 16, GOP_STARTCODE);
860
657ccb5a 861 time = s->current_picture_ptr->f.pts;
ca334dd1 862 if(s->reordered_input_picture[1])
657ccb5a 863 time = FFMIN(time, s->reordered_input_picture[1]->f.pts);
ca334dd1
MN
864 time= time*s->avctx->time_base.num;
865
866 seconds= time/s->avctx->time_base.den;
867 minutes= seconds/60; seconds %= 60;
868 hours= minutes/60; minutes %= 60;
869 hours%=24;
870
871 put_bits(&s->pb, 5, hours);
872 put_bits(&s->pb, 6, minutes);
873 put_bits(&s->pb, 1, 1);
874 put_bits(&s->pb, 6, seconds);
875
876 put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
877 put_bits(&s->pb, 1, 0); //broken link == NO
878
879 s->last_time_base= time / s->avctx->time_base.den;
880
881 ff_mpeg4_stuffing(&s->pb);
882}
883
884static void mpeg4_encode_visual_object_header(MpegEncContext * s){
885 int profile_and_level_indication;
886 int vo_ver_id;
887
888 if(s->avctx->profile != FF_PROFILE_UNKNOWN){
889 profile_and_level_indication = s->avctx->profile << 4;
890 }else if(s->max_b_frames || s->quarter_sample){
891 profile_and_level_indication= 0xF0; // adv simple
892 }else{
893 profile_and_level_indication= 0x00; // simple
894 }
895
896 if(s->avctx->level != FF_LEVEL_UNKNOWN){
897 profile_and_level_indication |= s->avctx->level;
898 }else{
899 profile_and_level_indication |= 1; //level 1
900 }
901
902 if(profile_and_level_indication>>4 == 0xF){
903 vo_ver_id= 5;
904 }else{
905 vo_ver_id= 1;
906 }
907
908 //FIXME levels
909
910 put_bits(&s->pb, 16, 0);
911 put_bits(&s->pb, 16, VOS_STARTCODE);
912
913 put_bits(&s->pb, 8, profile_and_level_indication);
914
915 put_bits(&s->pb, 16, 0);
916 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
917
918 put_bits(&s->pb, 1, 1);
919 put_bits(&s->pb, 4, vo_ver_id);
920 put_bits(&s->pb, 3, 1); //priority
921
922 put_bits(&s->pb, 4, 1); //visual obj type== video obj
923
924 put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
925
926 ff_mpeg4_stuffing(&s->pb);
927}
928
929static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
930{
931 int vo_ver_id;
932
933 if (!CONFIG_MPEG4_ENCODER) return;
934
935 if(s->max_b_frames || s->quarter_sample){
936 vo_ver_id= 5;
937 s->vo_type= ADV_SIMPLE_VO_TYPE;
938 }else{
939 vo_ver_id= 1;
940 s->vo_type= SIMPLE_VO_TYPE;
941 }
942
943 put_bits(&s->pb, 16, 0);
944 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
945 put_bits(&s->pb, 16, 0);
946 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
947
948 put_bits(&s->pb, 1, 0); /* random access vol */
949 put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
950 if(s->workaround_bugs & FF_BUG_MS) {
951 put_bits(&s->pb, 1, 0); /* is obj layer id= no */
952 } else {
953 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
954 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
955 put_bits(&s->pb, 3, 1); /* is obj layer priority */
956 }
957
958 s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
959
960 put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
961 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
962 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
963 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
964 }
965
966 if(s->workaround_bugs & FF_BUG_MS) { //
967 put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
968 } else {
969 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
970 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
971 put_bits(&s->pb, 1, s->low_delay);
972 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
973 }
974
975 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
976 put_bits(&s->pb, 1, 1); /* marker bit */
977
978 put_bits(&s->pb, 16, s->avctx->time_base.den);
979 if (s->time_increment_bits < 1)
980 s->time_increment_bits = 1;
981 put_bits(&s->pb, 1, 1); /* marker bit */
982 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
983 put_bits(&s->pb, 1, 1); /* marker bit */
984 put_bits(&s->pb, 13, s->width); /* vol width */
985 put_bits(&s->pb, 1, 1); /* marker bit */
986 put_bits(&s->pb, 13, s->height); /* vol height */
987 put_bits(&s->pb, 1, 1); /* marker bit */
988 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
989 put_bits(&s->pb, 1, 1); /* obmc disable */
990 if (vo_ver_id == 1) {
991 put_bits(&s->pb, 1, s->vol_sprite_usage); /* sprite enable */
992 }else{
993 put_bits(&s->pb, 2, s->vol_sprite_usage); /* sprite enable */
994 }
995
996 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
997 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
998
999 if(s->mpeg_quant){
1000 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
1001 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
1002 }
1003
1004 if (vo_ver_id != 1)
1005 put_bits(&s->pb, 1, s->quarter_sample);
1006 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1007 s->resync_marker= s->rtp_mode;
1008 put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
1009 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1010 if(s->data_partitioning){
1011 put_bits(&s->pb, 1, 0); /* no rvlc */
1012 }
1013
1014 if (vo_ver_id != 1){
1015 put_bits(&s->pb, 1, 0); /* newpred */
1016 put_bits(&s->pb, 1, 0); /* reduced res vop */
1017 }
1018 put_bits(&s->pb, 1, 0); /* scalability */
1019
1020 ff_mpeg4_stuffing(&s->pb);
1021
1022 /* user data */
1023 if(!(s->flags & CODEC_FLAG_BITEXACT)){
1024 put_bits(&s->pb, 16, 0);
1025 put_bits(&s->pb, 16, 0x1B2); /* user_data */
aefea4d0 1026 avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
ca334dd1
MN
1027 }
1028}
1029
1030/* write mpeg4 VOP header */
6f13a371 1031void ff_mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
ca334dd1
MN
1032{
1033 int time_incr;
1034 int time_div, time_mod;
1035
975a1447 1036 if(s->pict_type==AV_PICTURE_TYPE_I){
ca334dd1
MN
1037 if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
1038 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy
1039 mpeg4_encode_visual_object_header(s);
1040 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy
1041 mpeg4_encode_vol_header(s, 0, 0);
1042 }
1043 if(!(s->workaround_bugs & FF_BUG_MS))
1044 mpeg4_encode_gop_header(s);
1045 }
1046
975a1447 1047 s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B;
ca334dd1
MN
1048
1049 put_bits(&s->pb, 16, 0); /* vop header */
1050 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1051 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1052
1053 assert(s->time>=0);
1054 time_div= s->time/s->avctx->time_base.den;
1055 time_mod= s->time%s->avctx->time_base.den;
1056 time_incr= time_div - s->last_time_base;
1057 assert(time_incr >= 0);
1058 while(time_incr--)
1059 put_bits(&s->pb, 1, 1);
1060
1061 put_bits(&s->pb, 1, 0);
1062
1063 put_bits(&s->pb, 1, 1); /* marker */
1064 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1065 put_bits(&s->pb, 1, 1); /* marker */
1066 put_bits(&s->pb, 1, 1); /* vop coded */
975a1447
SS
1067 if ( s->pict_type == AV_PICTURE_TYPE_P
1068 || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) {
ca334dd1
MN
1069 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1070 }
1071 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1072 if(!s->progressive_sequence){
657ccb5a 1073 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
ca334dd1
MN
1074 put_bits(&s->pb, 1, s->alternate_scan);
1075 }
1076 //FIXME sprite stuff
1077
1078 put_bits(&s->pb, 5, s->qscale);
1079
975a1447 1080 if (s->pict_type != AV_PICTURE_TYPE_I)
ca334dd1 1081 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
975a1447 1082 if (s->pict_type == AV_PICTURE_TYPE_B)
ca334dd1
MN
1083 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1084}
1085
1086
6fee1b90 1087static av_cold void init_uni_dc_tab(void)
ca334dd1
MN
1088{
1089 int level, uni_code, uni_len;
1090
1091 for(level=-256; level<256; level++){
1092 int size, v, l;
1093 /* find number of bits */
1094 size = 0;
1095 v = abs(level);
1096 while (v) {
1097 v >>= 1;
1098 size++;
1099 }
1100
1101 if (level < 0)
1102 l= (-level) ^ ((1 << size) - 1);
1103 else
1104 l= level;
1105
1106 /* luminance */
05b858b0
MN
1107 uni_code= ff_mpeg4_DCtab_lum[size][0];
1108 uni_len = ff_mpeg4_DCtab_lum[size][1];
ca334dd1
MN
1109
1110 if (size > 0) {
1111 uni_code<<=size; uni_code|=l;
1112 uni_len+=size;
1113 if (size > 8){
1114 uni_code<<=1; uni_code|=1;
1115 uni_len++;
1116 }
1117 }
1118 uni_DCtab_lum_bits[level+256]= uni_code;
1119 uni_DCtab_lum_len [level+256]= uni_len;
1120
1121 /* chrominance */
05b858b0
MN
1122 uni_code= ff_mpeg4_DCtab_chrom[size][0];
1123 uni_len = ff_mpeg4_DCtab_chrom[size][1];
ca334dd1
MN
1124
1125 if (size > 0) {
1126 uni_code<<=size; uni_code|=l;
1127 uni_len+=size;
1128 if (size > 8){
1129 uni_code<<=1; uni_code|=1;
1130 uni_len++;
1131 }
1132 }
1133 uni_DCtab_chrom_bits[level+256]= uni_code;
1134 uni_DCtab_chrom_len [level+256]= uni_len;
1135
1136 }
1137}
1138
6fee1b90
DB
1139static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1140 uint8_t *len_tab)
1141{
ca334dd1
MN
1142 int slevel, run, last;
1143
1144 assert(MAX_LEVEL >= 64);
1145 assert(MAX_RUN >= 63);
1146
1147 for(slevel=-64; slevel<64; slevel++){
1148 if(slevel==0) continue;
1149 for(run=0; run<64; run++){
1150 for(last=0; last<=1; last++){
1151 const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
1152 int level= slevel < 0 ? -slevel : slevel;
1153 int sign= slevel < 0 ? 1 : 0;
1154 int bits, len, code;
1155 int level1, run1;
1156
1157 len_tab[index]= 100;
1158
1159 /* ESC0 */
1160 code= get_rl_index(rl, last, run, level);
1161 bits= rl->table_vlc[code][0];
1162 len= rl->table_vlc[code][1];
1163 bits=bits*2+sign; len++;
1164
1165 if(code!=rl->n && len < len_tab[index]){
1166 bits_tab[index]= bits;
1167 len_tab [index]= len;
1168 }
1169 /* ESC1 */
1170 bits= rl->table_vlc[rl->n][0];
1171 len= rl->table_vlc[rl->n][1];
1172 bits=bits*2; len++; //esc1
1173 level1= level - rl->max_level[last][run];
1174 if(level1>0){
1175 code= get_rl_index(rl, last, run, level1);
1176 bits<<= rl->table_vlc[code][1];
1177 len += rl->table_vlc[code][1];
1178 bits += rl->table_vlc[code][0];
1179 bits=bits*2+sign; len++;
1180
1181 if(code!=rl->n && len < len_tab[index]){
1182 bits_tab[index]= bits;
1183 len_tab [index]= len;
1184 }
1185 }
1186 /* ESC2 */
1187 bits= rl->table_vlc[rl->n][0];
1188 len= rl->table_vlc[rl->n][1];
1189 bits=bits*4+2; len+=2; //esc2
1190 run1 = run - rl->max_run[last][level] - 1;
1191 if(run1>=0){
1192 code= get_rl_index(rl, last, run1, level);
1193 bits<<= rl->table_vlc[code][1];
1194 len += rl->table_vlc[code][1];
1195 bits += rl->table_vlc[code][0];
1196 bits=bits*2+sign; len++;
1197
1198 if(code!=rl->n && len < len_tab[index]){
1199 bits_tab[index]= bits;
1200 len_tab [index]= len;
1201 }
1202 }
1203 /* ESC3 */
1204 bits= rl->table_vlc[rl->n][0];
1205 len = rl->table_vlc[rl->n][1];
1206 bits=bits*4+3; len+=2; //esc3
1207 bits=bits*2+last; len++;
1208 bits=bits*64+run; len+=6;
1209 bits=bits*2+1; len++; //marker
1210 bits=bits*4096+(slevel&0xfff); len+=12;
1211 bits=bits*2+1; len++; //marker
1212
1213 if(len < len_tab[index]){
1214 bits_tab[index]= bits;
1215 len_tab [index]= len;
1216 }
1217 }
1218 }
1219 }
1220}
1221
1222static av_cold int encode_init(AVCodecContext *avctx)
1223{
1224 MpegEncContext *s = avctx->priv_data;
1225 int ret;
1226 static int done = 0;
1227
efd29844 1228 if((ret=ff_MPV_encode_init(avctx)) < 0)
ca334dd1
MN
1229 return ret;
1230
1231 if (!done) {
1232 done = 1;
1233
1234 init_uni_dc_tab();
1235
e96b4a53 1236 ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
ca334dd1 1237
fef59a5b 1238 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
101ada9a 1239 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
ca334dd1
MN
1240 }
1241
1242 s->min_qcoeff= -2048;
1243 s->max_qcoeff= 2047;
1244 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1245 s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
1246 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1247 s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
1248 s->luma_dc_vlc_length= uni_DCtab_lum_len;
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MN
1249 s->ac_esc_length= 7+2+1+6+1+12+1;
1250 s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
1251 s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
1252
1253 if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
1254
1255 s->avctx->extradata= av_malloc(1024);
1256 init_put_bits(&s->pb, s->avctx->extradata, 1024);
1257
1258 if(!(s->workaround_bugs & FF_BUG_MS))
1259 mpeg4_encode_visual_object_header(s);
1260 mpeg4_encode_vol_header(s, 0, 0);
1261
1262// ff_mpeg4_stuffing(&s->pb); ?
1263 flush_put_bits(&s->pb);
1264 s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3;
1265 }
1266 return 0;
1267}
1268
1269void ff_mpeg4_init_partitions(MpegEncContext *s)
1270{
1271 uint8_t *start= put_bits_ptr(&s->pb);
1272 uint8_t *end= s->pb.buf_end;
1273 int size= end - start;
1274 int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start;
1275 int tex_size= (size - 2*pb_size)&(~3);
1276
1277 set_put_bits_buffer_size(&s->pb, pb_size);
1278 init_put_bits(&s->tex_pb, start + pb_size , tex_size);
1279 init_put_bits(&s->pb2 , start + pb_size + tex_size, pb_size);
1280}
1281
1282void ff_mpeg4_merge_partitions(MpegEncContext *s)
1283{
1284 const int pb2_len = put_bits_count(&s->pb2 );
1285 const int tex_pb_len= put_bits_count(&s->tex_pb);
1286 const int bits= put_bits_count(&s->pb);
1287
975a1447 1288 if(s->pict_type==AV_PICTURE_TYPE_I){
ca334dd1
MN
1289 put_bits(&s->pb, 19, DC_MARKER);
1290 s->misc_bits+=19 + pb2_len + bits - s->last_bits;
1291 s->i_tex_bits+= tex_pb_len;
1292 }else{
1293 put_bits(&s->pb, 17, MOTION_MARKER);
1294 s->misc_bits+=17 + pb2_len;
1295 s->mv_bits+= bits - s->last_bits;
1296 s->p_tex_bits+= tex_pb_len;
1297 }
1298
1299 flush_put_bits(&s->pb2);
1300 flush_put_bits(&s->tex_pb);
1301
1302 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
9f51c682
AK
1303 avpriv_copy_bits(&s->pb, s->pb2.buf , pb2_len);
1304 avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
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MN
1305 s->last_bits= put_bits_count(&s->pb);
1306}
1307
1308
1309void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1310{
1311 int mb_num_bits= av_log2(s->mb_num - 1) + 1;
1312
1313 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1314 put_bits(&s->pb, 1, 1);
1315
1316 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
1317 put_bits(&s->pb, s->quant_precision, s->qscale);
1318 put_bits(&s->pb, 1, 0); /* no HEC */
1319}
1320
4623420d
AK
1321#define OFFSET(x) offsetof(MpegEncContext, x)
1322#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1323static const AVOption options[] = {
e6153f17
MS
1324 { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1325 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
ed019b8e 1326 FF_MPV_COMMON_OPTS
4623420d
AK
1327 { NULL },
1328};
1329
1330static const AVClass mpeg4enc_class = {
1331 .class_name = "MPEG4 encoder",
1332 .item_name = av_default_item_name,
1333 .option = options,
1334 .version = LIBAVUTIL_VERSION_INT,
1335};
1336
d36beb3f 1337AVCodec ff_mpeg4_encoder = {
ec6402b7 1338 .name = "mpeg4",
b2bed932 1339 .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
ec6402b7 1340 .type = AVMEDIA_TYPE_VIDEO,
36ef5369 1341 .id = AV_CODEC_ID_MPEG4,
ec6402b7
AK
1342 .priv_data_size = sizeof(MpegEncContext),
1343 .init = encode_init,
445a7d48 1344 .encode2 = ff_MPV_encode_picture,
efd29844 1345 .close = ff_MPV_encode_end,
716d413c 1346 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
00c3b67b 1347 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
4623420d 1348 .priv_class = &mpeg4enc_class,
ca334dd1 1349};