3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
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.
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.
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
23 #include "mpegvideo.h"
25 #include "mpeg4video.h"
27 //The uni_DCtab_* tables below contain unified bits+length tables to encode DC
28 //differences in mpeg4. Unified in the sense that the specification specifies
29 //this encoding in several steps.
30 static uint8_t uni_DCtab_lum_len[512];
31 static uint8_t uni_DCtab_chrom_len[512];
32 static uint16_t uni_DCtab_lum_bits[512];
33 static uint16_t uni_DCtab_chrom_bits[512];
35 //unified encoding tables for run length encoding of coefficients
36 //unified in the sense that the specification specifies the encoding in several steps.
37 static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2];
38 static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2];
39 static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2];
40 static uint8_t uni_mpeg4_inter_rl_len [64*64*2*2];
41 //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
42 //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
43 #define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
57 * Return the number of bits that encoding the 8x8 block in block would need.
58 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
60 static inline int get_block_rate(MpegEncContext * s, DCTELEM block[64], int block_last_index, uint8_t scantable[64]){
65 for(j=1; j<=block_last_index; j++){
66 const int index= scantable[j];
67 int level= block[index];
70 if((level&(~127)) == 0){
71 if(j<block_last_index) rate+= s->intra_ac_vlc_length [UNI_AC_ENC_INDEX(j-last-1, level)];
72 else rate+= s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j-last-1, level)];
74 rate += s->ac_esc_length;
85 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
86 * This function also restores s->block_last_index.
87 * @param[in,out] block MB coefficients, these will be restored
88 * @param[in] dir ac prediction direction for each 8x8 block
89 * @param[out] st scantable for each 8x8 block
90 * @param[in] zigzag_last_index index refering to the last non zero coefficient in zigzag order
92 static inline void restore_ac_coeffs(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
95 memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6);
98 int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
100 st[n]= s->intra_scantable.permutated;
104 block[n][s->dsp.idct_permutation[i ]] = ac_val[i+8];
107 /* left prediction */
109 block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i ];
116 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
117 * This function will also update s->block_last_index and s->ac_val.
118 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
119 * @param[in] dir ac prediction direction for each 8x8 block
120 * @param[out] st scantable for each 8x8 block
121 * @param[out] zigzag_last_index index refering to the last non zero coefficient in zigzag order
123 static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
127 int8_t * const qscale_table= s->current_picture.qscale_table;
129 memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6);
132 int16_t *ac_val, *ac_val1;
134 score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated);
136 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
139 const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
141 ac_val-= s->block_wrap[n]*16;
142 if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
145 const int level= block[n][s->dsp.idct_permutation[i ]];
146 block[n][s->dsp.idct_permutation[i ]] = level - ac_val[i+8];
147 ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
151 /* different qscale, we must rescale */
153 const int level= block[n][s->dsp.idct_permutation[i ]];
154 block[n][s->dsp.idct_permutation[i ]] = level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
155 ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
159 st[n]= s->intra_h_scantable.permutated;
161 const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
162 /* left prediction */
164 if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
167 const int level= block[n][s->dsp.idct_permutation[i<<3]];
168 block[n][s->dsp.idct_permutation[i<<3]]= level - ac_val[i];
170 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
173 /* different qscale, we must rescale */
175 const int level= block[n][s->dsp.idct_permutation[i<<3]];
176 block[n][s->dsp.idct_permutation[i<<3]]= level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
178 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
181 st[n]= s->intra_v_scantable.permutated;
184 for(i=63; i>0; i--) //FIXME optimize
185 if(block[n][ st[n][i] ]) break;
186 s->block_last_index[n]= i;
188 score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
194 restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
200 * modify mb_type & qscale so that encoding is acually possible in mpeg4
202 void ff_clean_mpeg4_qscales(MpegEncContext *s){
204 int8_t * const qscale_table= s->current_picture.qscale_table;
206 ff_clean_h263_qscales(s);
208 if(s->pict_type== AV_PICTURE_TYPE_B){
210 /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */
212 for(i=0; i<s->mb_num; i++){
213 int mb_xy= s->mb_index2xy[i];
214 odd += qscale_table[mb_xy]&1;
217 if(2*odd > s->mb_num) odd=1;
220 for(i=0; i<s->mb_num; i++){
221 int mb_xy= s->mb_index2xy[i];
222 if((qscale_table[mb_xy]&1) != odd)
223 qscale_table[mb_xy]++;
224 if(qscale_table[mb_xy] > 31)
225 qscale_table[mb_xy]= 31;
228 for(i=1; i<s->mb_num; i++){
229 int mb_xy= s->mb_index2xy[i];
230 if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){
231 s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR;
239 * encodes the dc value.
240 * @param n block index (0-3 are luma, 4-5 are chroma)
242 static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
245 /* DC will overflow if level is outside the [-255,255] range. */
249 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
252 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
256 /* find number of bits */
266 put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
269 put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
272 /* encode remaining bits */
275 level = (-level) ^ ((1 << size) - 1);
276 put_bits(&s->pb, size, level);
278 put_bits(&s->pb, 1, 1);
283 static inline int mpeg4_get_dc_length(int level, int n){
285 return uni_DCtab_lum_len[level + 256];
287 return uni_DCtab_chrom_len[level + 256];
292 * encodes a 8x8 block
293 * @param n block index (0-3 are luma, 4-5 are chroma)
295 static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
296 uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
298 int i, last_non_zero;
301 const int last_index = s->block_last_index[n];
303 if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
304 /* mpeg4 based DC predictor */
305 mpeg4_encode_dc(dc_pb, intra_dc, n);
306 if(last_index<1) return;
308 bits_tab= uni_mpeg4_intra_rl_bits;
309 len_tab = uni_mpeg4_intra_rl_len;
311 if(last_index<0) return;
313 bits_tab= uni_mpeg4_inter_rl_bits;
314 len_tab = uni_mpeg4_inter_rl_len;
318 last_non_zero = i - 1;
319 for (; i < last_index; i++) {
320 int level = block[ scan_table[i] ];
322 int run = i - last_non_zero - 1;
324 if((level&(~127)) == 0){
325 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
326 put_bits(ac_pb, len_tab[index], bits_tab[index]);
328 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);
333 /*if(i<=last_index)*/{
334 int level = block[ scan_table[i] ];
335 int run = i - last_non_zero - 1;
337 if((level&(~127)) == 0){
338 const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
339 put_bits(ac_pb, len_tab[index], bits_tab[index]);
341 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);
346 static int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
349 int i, last_non_zero;
351 const int last_index = s->block_last_index[n];
354 if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
355 /* mpeg4 based DC predictor */
356 len += mpeg4_get_dc_length(intra_dc, n);
357 if(last_index<1) return len;
359 len_tab = uni_mpeg4_intra_rl_len;
361 if(last_index<0) return 0;
363 len_tab = uni_mpeg4_inter_rl_len;
367 last_non_zero = i - 1;
368 for (; i < last_index; i++) {
369 int level = block[ scan_table[i] ];
371 int run = i - last_non_zero - 1;
373 if((level&(~127)) == 0){
374 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
375 len += len_tab[index];
377 len += 7+2+1+6+1+12+1;
382 /*if(i<=last_index)*/{
383 int level = block[ scan_table[i] ];
384 int run = i - last_non_zero - 1;
386 if((level&(~127)) == 0){
387 const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
388 len += len_tab[index];
390 len += 7+2+1+6+1+12+1;
397 static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64], int intra_dc[6],
398 uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){
402 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
403 for (i = 0; i < 6; i++) {
404 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, intra_dc[i], scan_table[i]));
407 /* encode each block */
408 for (i = 0; i < 6; i++) {
409 mpeg4_encode_block(s, block[i], i, intra_dc[i], scan_table[i], dc_pb, ac_pb);
413 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
414 for (i = 0; i < 6; i++) {
415 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, 0, s->intra_scantable.permutated));
418 /* encode each block */
419 for (i = 0; i < 6; i++) {
420 mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, dc_pb, ac_pb);
426 //FIXME this is duplicated to h263.c
427 static const int dquant_code[5]= {1,0,9,2,3};
429 void mpeg4_encode_mb(MpegEncContext * s,
430 DCTELEM block[6][64],
431 int motion_x, int motion_y)
433 int cbpc, cbpy, pred_x, pred_y;
434 PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
435 PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
436 PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
437 const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
442 if(s->pict_type==AV_PICTURE_TYPE_B){
443 static const int mb_type_table[8]= {-1, 3, 2, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
444 int mb_type= mb_type_table[s->mv_dir];
451 s->last_mv[i][1][1]= 0;
455 assert(s->dquant>=-2 && s->dquant<=2);
456 assert((s->dquant&1)==0);
459 /* nothing to do if this MB was skipped in the next P Frame */
460 if(s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]){ //FIXME avoid DCT & ...
466 s->mv_dir= MV_DIR_FORWARD; //doesn't matter
467 s->qscale -= s->dquant;
473 cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type);
475 if ((cbp | motion_x | motion_y | mb_type) ==0) {
476 /* direct MB with MV={0,0} */
477 assert(s->dquant==0);
479 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
481 if(interleaved_stats){
489 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
490 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
491 put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :)
492 if(cbp) put_bits(&s->pb, 6, cbp);
496 put_bits(&s->pb, 2, (s->dquant>>2)+3);
498 put_bits(&s->pb, 1, 0);
500 s->qscale -= s->dquant;
502 if(!s->progressive_sequence){
504 put_bits(&s->pb, 1, s->interlaced_dct);
505 if(mb_type) // not direct mode
506 put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
509 if(interleaved_stats){
510 s->misc_bits+= get_bits_diff(s);
514 assert(s->mv_dir & MV_DIRECT);
515 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
519 assert(mb_type > 0 && mb_type < 4);
520 if(s->mv_type != MV_TYPE_FIELD){
521 if(s->mv_dir & MV_DIR_FORWARD){
522 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0],
523 s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
524 s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0];
525 s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1];
528 if(s->mv_dir & MV_DIR_BACKWARD){
529 ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0],
530 s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
531 s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0];
532 s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1];
536 if(s->mv_dir & MV_DIR_FORWARD){
537 put_bits(&s->pb, 1, s->field_select[0][0]);
538 put_bits(&s->pb, 1, s->field_select[0][1]);
540 if(s->mv_dir & MV_DIR_BACKWARD){
541 put_bits(&s->pb, 1, s->field_select[1][0]);
542 put_bits(&s->pb, 1, s->field_select[1][1]);
544 if(s->mv_dir & MV_DIR_FORWARD){
546 ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0] ,
547 s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code);
548 s->last_mv[0][i][0]= s->mv[0][i][0];
549 s->last_mv[0][i][1]= s->mv[0][i][1]*2;
553 if(s->mv_dir & MV_DIR_BACKWARD){
555 ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0] ,
556 s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code);
557 s->last_mv[1][i][0]= s->mv[1][i][0];
558 s->last_mv[1][i][1]= s->mv[1][i][1]*2;
565 if(interleaved_stats){
566 s->mv_bits+= get_bits_diff(s);
569 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
571 if(interleaved_stats){
572 s->p_tex_bits+= get_bits_diff(s);
575 }else{ /* s->pict_type==AV_PICTURE_TYPE_B */
576 cbp= get_p_cbp(s, block, motion_x, motion_y);
578 if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) {
579 /* check if the B frames can skip it too, as we must skip it if we skip here
580 why didn't they just compress the skip-mb bits instead of reusing them ?! */
581 if(s->max_b_frames>0){
588 if(x+16 > s->width) x= s->width-16;
589 if(y+16 > s->height) y= s->height-16;
591 offset= x + y*s->linesize;
592 p_pic= s->new_picture.data[0] + offset;
595 for(i=0; i<s->max_b_frames; i++){
598 Picture *pic= s->reordered_input_picture[i+1];
600 if(pic==NULL || pic->pict_type!=AV_PICTURE_TYPE_B) break;
602 b_pic= pic->data[0] + offset;
603 if(pic->type != FF_BUFFER_TYPE_SHARED)
604 b_pic+= INPLACE_OFFSET;
605 diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
606 if(diff>s->qscale*70){ //FIXME check that 70 is optimal
614 if(s->mb_skipped==1){
615 /* skip macroblock */
616 put_bits(&s->pb, 1, 1);
618 if(interleaved_stats){
628 put_bits(&s->pb, 1, 0); /* mb coded */
632 if(s->mv_type==MV_TYPE_16X16){
633 if(s->dquant) cbpc+= 8;
635 ff_h263_inter_MCBPC_bits[cbpc],
636 ff_h263_inter_MCBPC_code[cbpc]);
638 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
640 put_bits(pb2, 2, dquant_code[s->dquant+2]);
642 if(!s->progressive_sequence){
644 put_bits(pb2, 1, s->interlaced_dct);
648 if(interleaved_stats){
649 s->misc_bits+= get_bits_diff(s);
652 /* motion vectors: 16x16 mode */
653 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
655 ff_h263_encode_motion_vector(s, motion_x - pred_x,
656 motion_y - pred_y, s->f_code);
657 }else if(s->mv_type==MV_TYPE_FIELD){
658 if(s->dquant) cbpc+= 8;
660 ff_h263_inter_MCBPC_bits[cbpc],
661 ff_h263_inter_MCBPC_code[cbpc]);
663 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
665 put_bits(pb2, 2, dquant_code[s->dquant+2]);
667 assert(!s->progressive_sequence);
669 put_bits(pb2, 1, s->interlaced_dct);
672 if(interleaved_stats){
673 s->misc_bits+= get_bits_diff(s);
676 /* motion vectors: 16x8 interlaced mode */
677 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
680 put_bits(&s->pb, 1, s->field_select[0][0]);
681 put_bits(&s->pb, 1, s->field_select[0][1]);
683 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x,
684 s->mv[0][0][1] - pred_y, s->f_code);
685 ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x,
686 s->mv[0][1][1] - pred_y, s->f_code);
688 assert(s->mv_type==MV_TYPE_8X8);
690 ff_h263_inter_MCBPC_bits[cbpc+16],
691 ff_h263_inter_MCBPC_code[cbpc+16]);
692 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
694 if(!s->progressive_sequence){
696 put_bits(pb2, 1, s->interlaced_dct);
699 if(interleaved_stats){
700 s->misc_bits+= get_bits_diff(s);
704 /* motion vectors: 8x8 mode*/
705 h263_pred_motion(s, i, 0, &pred_x, &pred_y);
707 ff_h263_encode_motion_vector(s, s->current_picture.motion_val[0][ s->block_index[i] ][0] - pred_x,
708 s->current_picture.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code);
712 if(interleaved_stats){
713 s->mv_bits+= get_bits_diff(s);
716 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
718 if(interleaved_stats){
719 s->p_tex_bits+= get_bits_diff(s);
725 int dc_diff[6]; //dc values with the dc prediction subtracted
726 int dir[6]; //prediction direction
727 int zigzag_last_index[6];
728 uint8_t *scan_table[6];
732 dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
735 if(s->flags & CODEC_FLAG_AC_PRED){
736 s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
739 scan_table[i]= s->intra_scantable.permutated;
744 for (i = 0; i < 6; i++) {
745 if (s->block_last_index[i] >= 1)
750 if (s->pict_type == AV_PICTURE_TYPE_I) {
751 if(s->dquant) cbpc+=4;
753 ff_h263_intra_MCBPC_bits[cbpc],
754 ff_h263_intra_MCBPC_code[cbpc]);
756 if(s->dquant) cbpc+=8;
757 put_bits(&s->pb, 1, 0); /* mb coded */
759 ff_h263_inter_MCBPC_bits[cbpc + 4],
760 ff_h263_inter_MCBPC_code[cbpc + 4]);
762 put_bits(pb2, 1, s->ac_pred);
764 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
766 put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
768 if(!s->progressive_sequence){
769 put_bits(dc_pb, 1, s->interlaced_dct);
772 if(interleaved_stats){
773 s->misc_bits+= get_bits_diff(s);
776 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
778 if(interleaved_stats){
779 s->i_tex_bits+= get_bits_diff(s);
783 /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
785 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
790 * add mpeg4 stuffing bits (01...1)
792 void ff_mpeg4_stuffing(PutBitContext * pbc)
796 length= (-put_bits_count(pbc))&7;
797 if(length) put_bits(pbc, length, (1<<length)-1);
800 /* must be called before writing the header */
801 void ff_set_mpeg4_time(MpegEncContext * s){
802 if(s->pict_type==AV_PICTURE_TYPE_B){
803 ff_mpeg4_init_direct_mv(s);
805 s->last_time_base= s->time_base;
806 s->time_base= s->time/s->avctx->time_base.den;
810 static void mpeg4_encode_gop_header(MpegEncContext * s){
811 int hours, minutes, seconds;
814 put_bits(&s->pb, 16, 0);
815 put_bits(&s->pb, 16, GOP_STARTCODE);
817 time= s->current_picture_ptr->pts;
818 if(s->reordered_input_picture[1])
819 time= FFMIN(time, s->reordered_input_picture[1]->pts);
820 time= time*s->avctx->time_base.num;
822 seconds= time/s->avctx->time_base.den;
823 minutes= seconds/60; seconds %= 60;
824 hours= minutes/60; minutes %= 60;
827 put_bits(&s->pb, 5, hours);
828 put_bits(&s->pb, 6, minutes);
829 put_bits(&s->pb, 1, 1);
830 put_bits(&s->pb, 6, seconds);
832 put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
833 put_bits(&s->pb, 1, 0); //broken link == NO
835 s->last_time_base= time / s->avctx->time_base.den;
837 ff_mpeg4_stuffing(&s->pb);
840 static void mpeg4_encode_visual_object_header(MpegEncContext * s){
841 int profile_and_level_indication;
844 if(s->avctx->profile != FF_PROFILE_UNKNOWN){
845 profile_and_level_indication = s->avctx->profile << 4;
846 }else if(s->max_b_frames || s->quarter_sample){
847 profile_and_level_indication= 0xF0; // adv simple
849 profile_and_level_indication= 0x00; // simple
852 if(s->avctx->level != FF_LEVEL_UNKNOWN){
853 profile_and_level_indication |= s->avctx->level;
855 profile_and_level_indication |= 1; //level 1
858 if(profile_and_level_indication>>4 == 0xF){
866 put_bits(&s->pb, 16, 0);
867 put_bits(&s->pb, 16, VOS_STARTCODE);
869 put_bits(&s->pb, 8, profile_and_level_indication);
871 put_bits(&s->pb, 16, 0);
872 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
874 put_bits(&s->pb, 1, 1);
875 put_bits(&s->pb, 4, vo_ver_id);
876 put_bits(&s->pb, 3, 1); //priority
878 put_bits(&s->pb, 4, 1); //visual obj type== video obj
880 put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
882 ff_mpeg4_stuffing(&s->pb);
885 static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
889 if (!CONFIG_MPEG4_ENCODER) return;
891 if(s->max_b_frames || s->quarter_sample){
893 s->vo_type= ADV_SIMPLE_VO_TYPE;
896 s->vo_type= SIMPLE_VO_TYPE;
899 put_bits(&s->pb, 16, 0);
900 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
901 put_bits(&s->pb, 16, 0);
902 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
904 put_bits(&s->pb, 1, 0); /* random access vol */
905 put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
906 if(s->workaround_bugs & FF_BUG_MS) {
907 put_bits(&s->pb, 1, 0); /* is obj layer id= no */
909 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
910 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
911 put_bits(&s->pb, 3, 1); /* is obj layer priority */
914 s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
916 put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
917 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
918 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
919 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
922 if(s->workaround_bugs & FF_BUG_MS) { //
923 put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
925 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
926 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
927 put_bits(&s->pb, 1, s->low_delay);
928 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
931 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
932 put_bits(&s->pb, 1, 1); /* marker bit */
934 put_bits(&s->pb, 16, s->avctx->time_base.den);
935 if (s->time_increment_bits < 1)
936 s->time_increment_bits = 1;
937 put_bits(&s->pb, 1, 1); /* marker bit */
938 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
939 put_bits(&s->pb, 1, 1); /* marker bit */
940 put_bits(&s->pb, 13, s->width); /* vol width */
941 put_bits(&s->pb, 1, 1); /* marker bit */
942 put_bits(&s->pb, 13, s->height); /* vol height */
943 put_bits(&s->pb, 1, 1); /* marker bit */
944 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
945 put_bits(&s->pb, 1, 1); /* obmc disable */
946 if (vo_ver_id == 1) {
947 put_bits(&s->pb, 1, s->vol_sprite_usage); /* sprite enable */
949 put_bits(&s->pb, 2, s->vol_sprite_usage); /* sprite enable */
952 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
953 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
956 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
957 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
961 put_bits(&s->pb, 1, s->quarter_sample);
962 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
963 s->resync_marker= s->rtp_mode;
964 put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
965 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
966 if(s->data_partitioning){
967 put_bits(&s->pb, 1, 0); /* no rvlc */
971 put_bits(&s->pb, 1, 0); /* newpred */
972 put_bits(&s->pb, 1, 0); /* reduced res vop */
974 put_bits(&s->pb, 1, 0); /* scalability */
976 ff_mpeg4_stuffing(&s->pb);
979 if(!(s->flags & CODEC_FLAG_BITEXACT)){
980 put_bits(&s->pb, 16, 0);
981 put_bits(&s->pb, 16, 0x1B2); /* user_data */
982 ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
986 /* write mpeg4 VOP header */
987 void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
990 int time_div, time_mod;
992 if(s->pict_type==AV_PICTURE_TYPE_I){
993 if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
994 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy
995 mpeg4_encode_visual_object_header(s);
996 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy
997 mpeg4_encode_vol_header(s, 0, 0);
999 if(!(s->workaround_bugs & FF_BUG_MS))
1000 mpeg4_encode_gop_header(s);
1003 s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B;
1005 put_bits(&s->pb, 16, 0); /* vop header */
1006 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1007 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1010 time_div= s->time/s->avctx->time_base.den;
1011 time_mod= s->time%s->avctx->time_base.den;
1012 time_incr= time_div - s->last_time_base;
1013 assert(time_incr >= 0);
1015 put_bits(&s->pb, 1, 1);
1017 put_bits(&s->pb, 1, 0);
1019 put_bits(&s->pb, 1, 1); /* marker */
1020 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1021 put_bits(&s->pb, 1, 1); /* marker */
1022 put_bits(&s->pb, 1, 1); /* vop coded */
1023 if ( s->pict_type == AV_PICTURE_TYPE_P
1024 || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) {
1025 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1027 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1028 if(!s->progressive_sequence){
1029 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
1030 put_bits(&s->pb, 1, s->alternate_scan);
1032 //FIXME sprite stuff
1034 put_bits(&s->pb, 5, s->qscale);
1036 if (s->pict_type != AV_PICTURE_TYPE_I)
1037 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1038 if (s->pict_type == AV_PICTURE_TYPE_B)
1039 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1043 static void init_uni_dc_tab(void)
1045 int level, uni_code, uni_len;
1047 for(level=-256; level<256; level++){
1049 /* find number of bits */
1058 l= (-level) ^ ((1 << size) - 1);
1063 uni_code= ff_mpeg4_DCtab_lum[size][0];
1064 uni_len = ff_mpeg4_DCtab_lum[size][1];
1067 uni_code<<=size; uni_code|=l;
1070 uni_code<<=1; uni_code|=1;
1074 uni_DCtab_lum_bits[level+256]= uni_code;
1075 uni_DCtab_lum_len [level+256]= uni_len;
1078 uni_code= ff_mpeg4_DCtab_chrom[size][0];
1079 uni_len = ff_mpeg4_DCtab_chrom[size][1];
1082 uni_code<<=size; uni_code|=l;
1085 uni_code<<=1; uni_code|=1;
1089 uni_DCtab_chrom_bits[level+256]= uni_code;
1090 uni_DCtab_chrom_len [level+256]= uni_len;
1095 static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
1096 int slevel, run, last;
1098 assert(MAX_LEVEL >= 64);
1099 assert(MAX_RUN >= 63);
1101 for(slevel=-64; slevel<64; slevel++){
1102 if(slevel==0) continue;
1103 for(run=0; run<64; run++){
1104 for(last=0; last<=1; last++){
1105 const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
1106 int level= slevel < 0 ? -slevel : slevel;
1107 int sign= slevel < 0 ? 1 : 0;
1108 int bits, len, code;
1111 len_tab[index]= 100;
1114 code= get_rl_index(rl, last, run, level);
1115 bits= rl->table_vlc[code][0];
1116 len= rl->table_vlc[code][1];
1117 bits=bits*2+sign; len++;
1119 if(code!=rl->n && len < len_tab[index]){
1120 bits_tab[index]= bits;
1121 len_tab [index]= len;
1124 bits= rl->table_vlc[rl->n][0];
1125 len= rl->table_vlc[rl->n][1];
1126 bits=bits*2; len++; //esc1
1127 level1= level - rl->max_level[last][run];
1129 code= get_rl_index(rl, last, run, level1);
1130 bits<<= rl->table_vlc[code][1];
1131 len += rl->table_vlc[code][1];
1132 bits += rl->table_vlc[code][0];
1133 bits=bits*2+sign; len++;
1135 if(code!=rl->n && len < len_tab[index]){
1136 bits_tab[index]= bits;
1137 len_tab [index]= len;
1141 bits= rl->table_vlc[rl->n][0];
1142 len= rl->table_vlc[rl->n][1];
1143 bits=bits*4+2; len+=2; //esc2
1144 run1 = run - rl->max_run[last][level] - 1;
1146 code= get_rl_index(rl, last, run1, level);
1147 bits<<= rl->table_vlc[code][1];
1148 len += rl->table_vlc[code][1];
1149 bits += rl->table_vlc[code][0];
1150 bits=bits*2+sign; len++;
1152 if(code!=rl->n && len < len_tab[index]){
1153 bits_tab[index]= bits;
1154 len_tab [index]= len;
1158 bits= rl->table_vlc[rl->n][0];
1159 len = rl->table_vlc[rl->n][1];
1160 bits=bits*4+3; len+=2; //esc3
1161 bits=bits*2+last; len++;
1162 bits=bits*64+run; len+=6;
1163 bits=bits*2+1; len++; //marker
1164 bits=bits*4096+(slevel&0xfff); len+=12;
1165 bits=bits*2+1; len++; //marker
1167 if(len < len_tab[index]){
1168 bits_tab[index]= bits;
1169 len_tab [index]= len;
1176 static av_cold int encode_init(AVCodecContext *avctx)
1178 MpegEncContext *s = avctx->priv_data;
1180 static int done = 0;
1182 if((ret=MPV_encode_init(avctx)) < 0)
1190 init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
1192 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1193 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1196 s->min_qcoeff= -2048;
1197 s->max_qcoeff= 2047;
1198 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1199 s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
1200 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1201 s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
1202 s->luma_dc_vlc_length= uni_DCtab_lum_len;
1203 s->chroma_dc_vlc_length= uni_DCtab_chrom_len;
1204 s->ac_esc_length= 7+2+1+6+1+12+1;
1205 s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
1206 s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
1208 if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
1210 s->avctx->extradata= av_malloc(1024);
1211 init_put_bits(&s->pb, s->avctx->extradata, 1024);
1213 if(!(s->workaround_bugs & FF_BUG_MS))
1214 mpeg4_encode_visual_object_header(s);
1215 mpeg4_encode_vol_header(s, 0, 0);
1217 // ff_mpeg4_stuffing(&s->pb); ?
1218 flush_put_bits(&s->pb);
1219 s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3;
1224 void ff_mpeg4_init_partitions(MpegEncContext *s)
1226 uint8_t *start= put_bits_ptr(&s->pb);
1227 uint8_t *end= s->pb.buf_end;
1228 int size= end - start;
1229 int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start;
1230 int tex_size= (size - 2*pb_size)&(~3);
1232 set_put_bits_buffer_size(&s->pb, pb_size);
1233 init_put_bits(&s->tex_pb, start + pb_size , tex_size);
1234 init_put_bits(&s->pb2 , start + pb_size + tex_size, pb_size);
1237 void ff_mpeg4_merge_partitions(MpegEncContext *s)
1239 const int pb2_len = put_bits_count(&s->pb2 );
1240 const int tex_pb_len= put_bits_count(&s->tex_pb);
1241 const int bits= put_bits_count(&s->pb);
1243 if(s->pict_type==AV_PICTURE_TYPE_I){
1244 put_bits(&s->pb, 19, DC_MARKER);
1245 s->misc_bits+=19 + pb2_len + bits - s->last_bits;
1246 s->i_tex_bits+= tex_pb_len;
1248 put_bits(&s->pb, 17, MOTION_MARKER);
1249 s->misc_bits+=17 + pb2_len;
1250 s->mv_bits+= bits - s->last_bits;
1251 s->p_tex_bits+= tex_pb_len;
1254 flush_put_bits(&s->pb2);
1255 flush_put_bits(&s->tex_pb);
1257 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1258 ff_copy_bits(&s->pb, s->pb2.buf , pb2_len);
1259 ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1260 s->last_bits= put_bits_count(&s->pb);
1264 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1266 int mb_num_bits= av_log2(s->mb_num - 1) + 1;
1268 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1269 put_bits(&s->pb, 1, 1);
1271 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
1272 put_bits(&s->pb, s->quant_precision, s->qscale);
1273 put_bits(&s->pb, 1, 0); /* no HEC */
1276 AVCodec ff_mpeg4_encoder = {
1280 sizeof(MpegEncContext),
1284 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
1285 .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1286 .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),