Libav 0.7.1
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00001 /* 00002 * MPEG4 encoder. 00003 * Copyright (c) 2000,2001 Fabrice Bellard 00004 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at> 00005 * 00006 * This file is part of Libav. 00007 * 00008 * Libav is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * Libav is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with Libav; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00023 #include "mpegvideo.h" 00024 #include "h263.h" 00025 #include "mpeg4video.h" 00026 00027 //The uni_DCtab_* tables below contain unified bits+length tables to encode DC 00028 //differences in mpeg4. Unified in the sense that the specification specifies 00029 //this encoding in several steps. 00030 static uint8_t uni_DCtab_lum_len[512]; 00031 static uint8_t uni_DCtab_chrom_len[512]; 00032 static uint16_t uni_DCtab_lum_bits[512]; 00033 static uint16_t uni_DCtab_chrom_bits[512]; 00034 00035 //unified encoding tables for run length encoding of coefficients 00036 //unified in the sense that the specification specifies the encoding in several steps. 00037 static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2]; 00038 static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2]; 00039 static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2]; 00040 static uint8_t uni_mpeg4_inter_rl_len [64*64*2*2]; 00041 //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level)) 00042 //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64) 00043 #define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level)) 00044 00045 /* mpeg4 00046 inter 00047 max level: 24/6 00048 max run: 53/63 00049 00050 intra 00051 max level: 53/16 00052 max run: 29/41 00053 */ 00054 00055 00060 static inline int get_block_rate(MpegEncContext * s, DCTELEM block[64], int block_last_index, uint8_t scantable[64]){ 00061 int last=0; 00062 int j; 00063 int rate=0; 00064 00065 for(j=1; j<=block_last_index; j++){ 00066 const int index= scantable[j]; 00067 int level= block[index]; 00068 if(level){ 00069 level+= 64; 00070 if((level&(~127)) == 0){ 00071 if(j<block_last_index) rate+= s->intra_ac_vlc_length [UNI_AC_ENC_INDEX(j-last-1, level)]; 00072 else rate+= s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j-last-1, level)]; 00073 }else 00074 rate += s->ac_esc_length; 00075 00076 last= j; 00077 } 00078 } 00079 00080 return rate; 00081 } 00082 00083 00092 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]) 00093 { 00094 int i, n; 00095 memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6); 00096 00097 for(n=0; n<6; n++){ 00098 int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16; 00099 00100 st[n]= s->intra_scantable.permutated; 00101 if(dir[n]){ 00102 /* top prediction */ 00103 for(i=1; i<8; i++){ 00104 block[n][s->dsp.idct_permutation[i ]] = ac_val[i+8]; 00105 } 00106 }else{ 00107 /* left prediction */ 00108 for(i=1; i<8; i++){ 00109 block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i ]; 00110 } 00111 } 00112 } 00113 } 00114 00123 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]) 00124 { 00125 int score= 0; 00126 int i, n; 00127 int8_t * const qscale_table= s->current_picture.qscale_table; 00128 00129 memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6); 00130 00131 for(n=0; n<6; n++){ 00132 int16_t *ac_val, *ac_val1; 00133 00134 score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated); 00135 00136 ac_val = s->ac_val[0][0] + s->block_index[n] * 16; 00137 ac_val1= ac_val; 00138 if(dir[n]){ 00139 const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride; 00140 /* top prediction */ 00141 ac_val-= s->block_wrap[n]*16; 00142 if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){ 00143 /* same qscale */ 00144 for(i=1; i<8; i++){ 00145 const int level= block[n][s->dsp.idct_permutation[i ]]; 00146 block[n][s->dsp.idct_permutation[i ]] = level - ac_val[i+8]; 00147 ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]]; 00148 ac_val1[i+8]= level; 00149 } 00150 }else{ 00151 /* different qscale, we must rescale */ 00152 for(i=1; i<8; i++){ 00153 const int level= block[n][s->dsp.idct_permutation[i ]]; 00154 block[n][s->dsp.idct_permutation[i ]] = level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale); 00155 ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]]; 00156 ac_val1[i+8]= level; 00157 } 00158 } 00159 st[n]= s->intra_h_scantable.permutated; 00160 }else{ 00161 const int xy= s->mb_x-1 + s->mb_y*s->mb_stride; 00162 /* left prediction */ 00163 ac_val-= 16; 00164 if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){ 00165 /* same qscale */ 00166 for(i=1; i<8; i++){ 00167 const int level= block[n][s->dsp.idct_permutation[i<<3]]; 00168 block[n][s->dsp.idct_permutation[i<<3]]= level - ac_val[i]; 00169 ac_val1[i ]= level; 00170 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]]; 00171 } 00172 }else{ 00173 /* different qscale, we must rescale */ 00174 for(i=1; i<8; i++){ 00175 const int level= block[n][s->dsp.idct_permutation[i<<3]]; 00176 block[n][s->dsp.idct_permutation[i<<3]]= level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale); 00177 ac_val1[i ]= level; 00178 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]]; 00179 } 00180 } 00181 st[n]= s->intra_v_scantable.permutated; 00182 } 00183 00184 for(i=63; i>0; i--) //FIXME optimize 00185 if(block[n][ st[n][i] ]) break; 00186 s->block_last_index[n]= i; 00187 00188 score += get_block_rate(s, block[n], s->block_last_index[n], st[n]); 00189 } 00190 00191 if(score < 0){ 00192 return 1; 00193 }else{ 00194 restore_ac_coeffs(s, block, dir, st, zigzag_last_index); 00195 return 0; 00196 } 00197 } 00198 00202 void ff_clean_mpeg4_qscales(MpegEncContext *s){ 00203 int i; 00204 int8_t * const qscale_table= s->current_picture.qscale_table; 00205 00206 ff_clean_h263_qscales(s); 00207 00208 if(s->pict_type== AV_PICTURE_TYPE_B){ 00209 int odd=0; 00210 /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */ 00211 00212 for(i=0; i<s->mb_num; i++){ 00213 int mb_xy= s->mb_index2xy[i]; 00214 odd += qscale_table[mb_xy]&1; 00215 } 00216 00217 if(2*odd > s->mb_num) odd=1; 00218 else odd=0; 00219 00220 for(i=0; i<s->mb_num; i++){ 00221 int mb_xy= s->mb_index2xy[i]; 00222 if((qscale_table[mb_xy]&1) != odd) 00223 qscale_table[mb_xy]++; 00224 if(qscale_table[mb_xy] > 31) 00225 qscale_table[mb_xy]= 31; 00226 } 00227 00228 for(i=1; i<s->mb_num; i++){ 00229 int mb_xy= s->mb_index2xy[i]; 00230 if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){ 00231 s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR; 00232 } 00233 } 00234 } 00235 } 00236 00237 00242 static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n) 00243 { 00244 #if 1 00245 /* DC will overflow if level is outside the [-255,255] range. */ 00246 level+=256; 00247 if (n < 4) { 00248 /* luminance */ 00249 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]); 00250 } else { 00251 /* chrominance */ 00252 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]); 00253 } 00254 #else 00255 int size, v; 00256 /* find number of bits */ 00257 size = 0; 00258 v = abs(level); 00259 while (v) { 00260 v >>= 1; 00261 size++; 00262 } 00263 00264 if (n < 4) { 00265 /* luminance */ 00266 put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]); 00267 } else { 00268 /* chrominance */ 00269 put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]); 00270 } 00271 00272 /* encode remaining bits */ 00273 if (size > 0) { 00274 if (level < 0) 00275 level = (-level) ^ ((1 << size) - 1); 00276 put_bits(&s->pb, size, level); 00277 if (size > 8) 00278 put_bits(&s->pb, 1, 1); 00279 } 00280 #endif 00281 } 00282 00283 static inline int mpeg4_get_dc_length(int level, int n){ 00284 if (n < 4) { 00285 return uni_DCtab_lum_len[level + 256]; 00286 } else { 00287 return uni_DCtab_chrom_len[level + 256]; 00288 } 00289 } 00290 00295 static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc, 00296 uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb) 00297 { 00298 int i, last_non_zero; 00299 #if 0 //variables for the outcommented version 00300 int code, sign, last; 00301 #endif 00302 const RLTable *rl; 00303 uint32_t *bits_tab; 00304 uint8_t *len_tab; 00305 const int last_index = s->block_last_index[n]; 00306 00307 if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away 00308 /* mpeg4 based DC predictor */ 00309 mpeg4_encode_dc(dc_pb, intra_dc, n); 00310 if(last_index<1) return; 00311 i = 1; 00312 rl = &ff_mpeg4_rl_intra; 00313 bits_tab= uni_mpeg4_intra_rl_bits; 00314 len_tab = uni_mpeg4_intra_rl_len; 00315 } else { 00316 if(last_index<0) return; 00317 i = 0; 00318 rl = &ff_h263_rl_inter; 00319 bits_tab= uni_mpeg4_inter_rl_bits; 00320 len_tab = uni_mpeg4_inter_rl_len; 00321 } 00322 00323 /* AC coefs */ 00324 last_non_zero = i - 1; 00325 #if 1 00326 for (; i < last_index; i++) { 00327 int level = block[ scan_table[i] ]; 00328 if (level) { 00329 int run = i - last_non_zero - 1; 00330 level+=64; 00331 if((level&(~127)) == 0){ 00332 const int index= UNI_MPEG4_ENC_INDEX(0, run, level); 00333 put_bits(ac_pb, len_tab[index], bits_tab[index]); 00334 }else{ //ESC3 00335 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); 00336 } 00337 last_non_zero = i; 00338 } 00339 } 00340 /*if(i<=last_index)*/{ 00341 int level = block[ scan_table[i] ]; 00342 int run = i - last_non_zero - 1; 00343 level+=64; 00344 if((level&(~127)) == 0){ 00345 const int index= UNI_MPEG4_ENC_INDEX(1, run, level); 00346 put_bits(ac_pb, len_tab[index], bits_tab[index]); 00347 }else{ //ESC3 00348 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); 00349 } 00350 } 00351 #else 00352 for (; i <= last_index; i++) { 00353 const int slevel = block[ scan_table[i] ]; 00354 if (slevel) { 00355 int level; 00356 int run = i - last_non_zero - 1; 00357 last = (i == last_index); 00358 sign = 0; 00359 level = slevel; 00360 if (level < 0) { 00361 sign = 1; 00362 level = -level; 00363 } 00364 code = get_rl_index(rl, last, run, level); 00365 put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); 00366 if (code == rl->n) { 00367 int level1, run1; 00368 level1 = level - rl->max_level[last][run]; 00369 if (level1 < 1) 00370 goto esc2; 00371 code = get_rl_index(rl, last, run, level1); 00372 if (code == rl->n) { 00373 esc2: 00374 put_bits(ac_pb, 1, 1); 00375 if (level > MAX_LEVEL) 00376 goto esc3; 00377 run1 = run - rl->max_run[last][level] - 1; 00378 if (run1 < 0) 00379 goto esc3; 00380 code = get_rl_index(rl, last, run1, level); 00381 if (code == rl->n) { 00382 esc3: 00383 /* third escape */ 00384 put_bits(ac_pb, 1, 1); 00385 put_bits(ac_pb, 1, last); 00386 put_bits(ac_pb, 6, run); 00387 put_bits(ac_pb, 1, 1); 00388 put_sbits(ac_pb, 12, slevel); 00389 put_bits(ac_pb, 1, 1); 00390 } else { 00391 /* second escape */ 00392 put_bits(ac_pb, 1, 0); 00393 put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); 00394 put_bits(ac_pb, 1, sign); 00395 } 00396 } else { 00397 /* first escape */ 00398 put_bits(ac_pb, 1, 0); 00399 put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); 00400 put_bits(ac_pb, 1, sign); 00401 } 00402 } else { 00403 put_bits(ac_pb, 1, sign); 00404 } 00405 last_non_zero = i; 00406 } 00407 } 00408 #endif 00409 } 00410 00411 static int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc, 00412 uint8_t *scan_table) 00413 { 00414 int i, last_non_zero; 00415 uint8_t *len_tab; 00416 const int last_index = s->block_last_index[n]; 00417 int len=0; 00418 00419 if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away 00420 /* mpeg4 based DC predictor */ 00421 len += mpeg4_get_dc_length(intra_dc, n); 00422 if(last_index<1) return len; 00423 i = 1; 00424 len_tab = uni_mpeg4_intra_rl_len; 00425 } else { 00426 if(last_index<0) return 0; 00427 i = 0; 00428 len_tab = uni_mpeg4_inter_rl_len; 00429 } 00430 00431 /* AC coefs */ 00432 last_non_zero = i - 1; 00433 for (; i < last_index; i++) { 00434 int level = block[ scan_table[i] ]; 00435 if (level) { 00436 int run = i - last_non_zero - 1; 00437 level+=64; 00438 if((level&(~127)) == 0){ 00439 const int index= UNI_MPEG4_ENC_INDEX(0, run, level); 00440 len += len_tab[index]; 00441 }else{ //ESC3 00442 len += 7+2+1+6+1+12+1; 00443 } 00444 last_non_zero = i; 00445 } 00446 } 00447 /*if(i<=last_index)*/{ 00448 int level = block[ scan_table[i] ]; 00449 int run = i - last_non_zero - 1; 00450 level+=64; 00451 if((level&(~127)) == 0){ 00452 const int index= UNI_MPEG4_ENC_INDEX(1, run, level); 00453 len += len_tab[index]; 00454 }else{ //ESC3 00455 len += 7+2+1+6+1+12+1; 00456 } 00457 } 00458 00459 return len; 00460 } 00461 00462 static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64], int intra_dc[6], 00463 uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){ 00464 int i; 00465 00466 if(scan_table){ 00467 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ 00468 for (i = 0; i < 6; i++) { 00469 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, intra_dc[i], scan_table[i])); 00470 } 00471 }else{ 00472 /* encode each block */ 00473 for (i = 0; i < 6; i++) { 00474 mpeg4_encode_block(s, block[i], i, intra_dc[i], scan_table[i], dc_pb, ac_pb); 00475 } 00476 } 00477 }else{ 00478 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ 00479 for (i = 0; i < 6; i++) { 00480 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, 0, s->intra_scantable.permutated)); 00481 } 00482 }else{ 00483 /* encode each block */ 00484 for (i = 0; i < 6; i++) { 00485 mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, dc_pb, ac_pb); 00486 } 00487 } 00488 } 00489 } 00490 00491 //FIXME this is duplicated to h263.c 00492 static const int dquant_code[5]= {1,0,9,2,3}; 00493 00494 void mpeg4_encode_mb(MpegEncContext * s, 00495 DCTELEM block[6][64], 00496 int motion_x, int motion_y) 00497 { 00498 int cbpc, cbpy, pred_x, pred_y; 00499 PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb; 00500 PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb; 00501 PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb; 00502 const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0; 00503 00504 if (!s->mb_intra) { 00505 int i, cbp; 00506 00507 if(s->pict_type==AV_PICTURE_TYPE_B){ 00508 static const int mb_type_table[8]= {-1, 3, 2, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */ 00509 int mb_type= mb_type_table[s->mv_dir]; 00510 00511 if(s->mb_x==0){ 00512 for(i=0; i<2; i++){ 00513 s->last_mv[i][0][0]= 00514 s->last_mv[i][0][1]= 00515 s->last_mv[i][1][0]= 00516 s->last_mv[i][1][1]= 0; 00517 } 00518 } 00519 00520 assert(s->dquant>=-2 && s->dquant<=2); 00521 assert((s->dquant&1)==0); 00522 assert(mb_type>=0); 00523 00524 /* nothing to do if this MB was skipped in the next P Frame */ 00525 if(s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]){ //FIXME avoid DCT & ... 00526 s->skip_count++; 00527 s->mv[0][0][0]= 00528 s->mv[0][0][1]= 00529 s->mv[1][0][0]= 00530 s->mv[1][0][1]= 0; 00531 s->mv_dir= MV_DIR_FORWARD; //doesn't matter 00532 s->qscale -= s->dquant; 00533 // s->mb_skipped=1; 00534 00535 return; 00536 } 00537 00538 cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type); 00539 00540 if ((cbp | motion_x | motion_y | mb_type) ==0) { 00541 /* direct MB with MV={0,0} */ 00542 assert(s->dquant==0); 00543 00544 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */ 00545 00546 if(interleaved_stats){ 00547 s->misc_bits++; 00548 s->last_bits++; 00549 } 00550 s->skip_count++; 00551 return; 00552 } 00553 00554 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */ 00555 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge 00556 put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :) 00557 if(cbp) put_bits(&s->pb, 6, cbp); 00558 00559 if(cbp && mb_type){ 00560 if(s->dquant) 00561 put_bits(&s->pb, 2, (s->dquant>>2)+3); 00562 else 00563 put_bits(&s->pb, 1, 0); 00564 }else 00565 s->qscale -= s->dquant; 00566 00567 if(!s->progressive_sequence){ 00568 if(cbp) 00569 put_bits(&s->pb, 1, s->interlaced_dct); 00570 if(mb_type) // not direct mode 00571 put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD); 00572 } 00573 00574 if(interleaved_stats){ 00575 s->misc_bits+= get_bits_diff(s); 00576 } 00577 00578 if(mb_type == 0){ 00579 assert(s->mv_dir & MV_DIRECT); 00580 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1); 00581 s->b_count++; 00582 s->f_count++; 00583 }else{ 00584 assert(mb_type > 0 && mb_type < 4); 00585 if(s->mv_type != MV_TYPE_FIELD){ 00586 if(s->mv_dir & MV_DIR_FORWARD){ 00587 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0], 00588 s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code); 00589 s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0]; 00590 s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1]; 00591 s->f_count++; 00592 } 00593 if(s->mv_dir & MV_DIR_BACKWARD){ 00594 ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0], 00595 s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code); 00596 s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0]; 00597 s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1]; 00598 s->b_count++; 00599 } 00600 }else{ 00601 if(s->mv_dir & MV_DIR_FORWARD){ 00602 put_bits(&s->pb, 1, s->field_select[0][0]); 00603 put_bits(&s->pb, 1, s->field_select[0][1]); 00604 } 00605 if(s->mv_dir & MV_DIR_BACKWARD){ 00606 put_bits(&s->pb, 1, s->field_select[1][0]); 00607 put_bits(&s->pb, 1, s->field_select[1][1]); 00608 } 00609 if(s->mv_dir & MV_DIR_FORWARD){ 00610 for(i=0; i<2; i++){ 00611 ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0] , 00612 s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code); 00613 s->last_mv[0][i][0]= s->mv[0][i][0]; 00614 s->last_mv[0][i][1]= s->mv[0][i][1]*2; 00615 } 00616 s->f_count++; 00617 } 00618 if(s->mv_dir & MV_DIR_BACKWARD){ 00619 for(i=0; i<2; i++){ 00620 ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0] , 00621 s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code); 00622 s->last_mv[1][i][0]= s->mv[1][i][0]; 00623 s->last_mv[1][i][1]= s->mv[1][i][1]*2; 00624 } 00625 s->b_count++; 00626 } 00627 } 00628 } 00629 00630 if(interleaved_stats){ 00631 s->mv_bits+= get_bits_diff(s); 00632 } 00633 00634 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb); 00635 00636 if(interleaved_stats){ 00637 s->p_tex_bits+= get_bits_diff(s); 00638 } 00639 00640 }else{ /* s->pict_type==AV_PICTURE_TYPE_B */ 00641 cbp= get_p_cbp(s, block, motion_x, motion_y); 00642 00643 if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) { 00644 /* check if the B frames can skip it too, as we must skip it if we skip here 00645 why didn't they just compress the skip-mb bits instead of reusing them ?! */ 00646 if(s->max_b_frames>0){ 00647 int i; 00648 int x,y, offset; 00649 uint8_t *p_pic; 00650 00651 x= s->mb_x*16; 00652 y= s->mb_y*16; 00653 if(x+16 > s->width) x= s->width-16; 00654 if(y+16 > s->height) y= s->height-16; 00655 00656 offset= x + y*s->linesize; 00657 p_pic= s->new_picture.data[0] + offset; 00658 00659 s->mb_skipped=1; 00660 for(i=0; i<s->max_b_frames; i++){ 00661 uint8_t *b_pic; 00662 int diff; 00663 Picture *pic= s->reordered_input_picture[i+1]; 00664 00665 if(pic==NULL || pic->pict_type!=AV_PICTURE_TYPE_B) break; 00666 00667 b_pic= pic->data[0] + offset; 00668 if(pic->type != FF_BUFFER_TYPE_SHARED) 00669 b_pic+= INPLACE_OFFSET; 00670 diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16); 00671 if(diff>s->qscale*70){ //FIXME check that 70 is optimal 00672 s->mb_skipped=0; 00673 break; 00674 } 00675 } 00676 }else 00677 s->mb_skipped=1; 00678 00679 if(s->mb_skipped==1){ 00680 /* skip macroblock */ 00681 put_bits(&s->pb, 1, 1); 00682 00683 if(interleaved_stats){ 00684 s->misc_bits++; 00685 s->last_bits++; 00686 } 00687 s->skip_count++; 00688 00689 return; 00690 } 00691 } 00692 00693 put_bits(&s->pb, 1, 0); /* mb coded */ 00694 cbpc = cbp & 3; 00695 cbpy = cbp >> 2; 00696 cbpy ^= 0xf; 00697 if(s->mv_type==MV_TYPE_16X16){ 00698 if(s->dquant) cbpc+= 8; 00699 put_bits(&s->pb, 00700 ff_h263_inter_MCBPC_bits[cbpc], 00701 ff_h263_inter_MCBPC_code[cbpc]); 00702 00703 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); 00704 if(s->dquant) 00705 put_bits(pb2, 2, dquant_code[s->dquant+2]); 00706 00707 if(!s->progressive_sequence){ 00708 if(cbp) 00709 put_bits(pb2, 1, s->interlaced_dct); 00710 put_bits(pb2, 1, 0); 00711 } 00712 00713 if(interleaved_stats){ 00714 s->misc_bits+= get_bits_diff(s); 00715 } 00716 00717 /* motion vectors: 16x16 mode */ 00718 h263_pred_motion(s, 0, 0, &pred_x, &pred_y); 00719 00720 ff_h263_encode_motion_vector(s, motion_x - pred_x, 00721 motion_y - pred_y, s->f_code); 00722 }else if(s->mv_type==MV_TYPE_FIELD){ 00723 if(s->dquant) cbpc+= 8; 00724 put_bits(&s->pb, 00725 ff_h263_inter_MCBPC_bits[cbpc], 00726 ff_h263_inter_MCBPC_code[cbpc]); 00727 00728 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); 00729 if(s->dquant) 00730 put_bits(pb2, 2, dquant_code[s->dquant+2]); 00731 00732 assert(!s->progressive_sequence); 00733 if(cbp) 00734 put_bits(pb2, 1, s->interlaced_dct); 00735 put_bits(pb2, 1, 1); 00736 00737 if(interleaved_stats){ 00738 s->misc_bits+= get_bits_diff(s); 00739 } 00740 00741 /* motion vectors: 16x8 interlaced mode */ 00742 h263_pred_motion(s, 0, 0, &pred_x, &pred_y); 00743 pred_y /=2; 00744 00745 put_bits(&s->pb, 1, s->field_select[0][0]); 00746 put_bits(&s->pb, 1, s->field_select[0][1]); 00747 00748 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x, 00749 s->mv[0][0][1] - pred_y, s->f_code); 00750 ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x, 00751 s->mv[0][1][1] - pred_y, s->f_code); 00752 }else{ 00753 assert(s->mv_type==MV_TYPE_8X8); 00754 put_bits(&s->pb, 00755 ff_h263_inter_MCBPC_bits[cbpc+16], 00756 ff_h263_inter_MCBPC_code[cbpc+16]); 00757 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); 00758 00759 if(!s->progressive_sequence){ 00760 if(cbp) 00761 put_bits(pb2, 1, s->interlaced_dct); 00762 } 00763 00764 if(interleaved_stats){ 00765 s->misc_bits+= get_bits_diff(s); 00766 } 00767 00768 for(i=0; i<4; i++){ 00769 /* motion vectors: 8x8 mode*/ 00770 h263_pred_motion(s, i, 0, &pred_x, &pred_y); 00771 00772 ff_h263_encode_motion_vector(s, s->current_picture.motion_val[0][ s->block_index[i] ][0] - pred_x, 00773 s->current_picture.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code); 00774 } 00775 } 00776 00777 if(interleaved_stats){ 00778 s->mv_bits+= get_bits_diff(s); 00779 } 00780 00781 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb); 00782 00783 if(interleaved_stats){ 00784 s->p_tex_bits+= get_bits_diff(s); 00785 } 00786 s->f_count++; 00787 } 00788 } else { 00789 int cbp; 00790 int dc_diff[6]; //dc values with the dc prediction subtracted 00791 int dir[6]; //prediction direction 00792 int zigzag_last_index[6]; 00793 uint8_t *scan_table[6]; 00794 int i; 00795 00796 for(i=0; i<6; i++){ 00797 dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1); 00798 } 00799 00800 if(s->flags & CODEC_FLAG_AC_PRED){ 00801 s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index); 00802 }else{ 00803 for(i=0; i<6; i++) 00804 scan_table[i]= s->intra_scantable.permutated; 00805 } 00806 00807 /* compute cbp */ 00808 cbp = 0; 00809 for (i = 0; i < 6; i++) { 00810 if (s->block_last_index[i] >= 1) 00811 cbp |= 1 << (5 - i); 00812 } 00813 00814 cbpc = cbp & 3; 00815 if (s->pict_type == AV_PICTURE_TYPE_I) { 00816 if(s->dquant) cbpc+=4; 00817 put_bits(&s->pb, 00818 ff_h263_intra_MCBPC_bits[cbpc], 00819 ff_h263_intra_MCBPC_code[cbpc]); 00820 } else { 00821 if(s->dquant) cbpc+=8; 00822 put_bits(&s->pb, 1, 0); /* mb coded */ 00823 put_bits(&s->pb, 00824 ff_h263_inter_MCBPC_bits[cbpc + 4], 00825 ff_h263_inter_MCBPC_code[cbpc + 4]); 00826 } 00827 put_bits(pb2, 1, s->ac_pred); 00828 cbpy = cbp >> 2; 00829 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); 00830 if(s->dquant) 00831 put_bits(dc_pb, 2, dquant_code[s->dquant+2]); 00832 00833 if(!s->progressive_sequence){ 00834 put_bits(dc_pb, 1, s->interlaced_dct); 00835 } 00836 00837 if(interleaved_stats){ 00838 s->misc_bits+= get_bits_diff(s); 00839 } 00840 00841 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb); 00842 00843 if(interleaved_stats){ 00844 s->i_tex_bits+= get_bits_diff(s); 00845 } 00846 s->i_count++; 00847 00848 /* restore ac coeffs & last_index stuff if we messed them up with the prediction */ 00849 if(s->ac_pred) 00850 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index); 00851 } 00852 } 00853 00857 void ff_mpeg4_stuffing(PutBitContext * pbc) 00858 { 00859 int length; 00860 put_bits(pbc, 1, 0); 00861 length= (-put_bits_count(pbc))&7; 00862 if(length) put_bits(pbc, length, (1<<length)-1); 00863 } 00864 00865 /* must be called before writing the header */ 00866 void ff_set_mpeg4_time(MpegEncContext * s){ 00867 if(s->pict_type==AV_PICTURE_TYPE_B){ 00868 ff_mpeg4_init_direct_mv(s); 00869 }else{ 00870 s->last_time_base= s->time_base; 00871 s->time_base= s->time/s->avctx->time_base.den; 00872 } 00873 } 00874 00875 static void mpeg4_encode_gop_header(MpegEncContext * s){ 00876 int hours, minutes, seconds; 00877 int64_t time; 00878 00879 put_bits(&s->pb, 16, 0); 00880 put_bits(&s->pb, 16, GOP_STARTCODE); 00881 00882 time= s->current_picture_ptr->pts; 00883 if(s->reordered_input_picture[1]) 00884 time= FFMIN(time, s->reordered_input_picture[1]->pts); 00885 time= time*s->avctx->time_base.num; 00886 00887 seconds= time/s->avctx->time_base.den; 00888 minutes= seconds/60; seconds %= 60; 00889 hours= minutes/60; minutes %= 60; 00890 hours%=24; 00891 00892 put_bits(&s->pb, 5, hours); 00893 put_bits(&s->pb, 6, minutes); 00894 put_bits(&s->pb, 1, 1); 00895 put_bits(&s->pb, 6, seconds); 00896 00897 put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP)); 00898 put_bits(&s->pb, 1, 0); //broken link == NO 00899 00900 s->last_time_base= time / s->avctx->time_base.den; 00901 00902 ff_mpeg4_stuffing(&s->pb); 00903 } 00904 00905 static void mpeg4_encode_visual_object_header(MpegEncContext * s){ 00906 int profile_and_level_indication; 00907 int vo_ver_id; 00908 00909 if(s->avctx->profile != FF_PROFILE_UNKNOWN){ 00910 profile_and_level_indication = s->avctx->profile << 4; 00911 }else if(s->max_b_frames || s->quarter_sample){ 00912 profile_and_level_indication= 0xF0; // adv simple 00913 }else{ 00914 profile_and_level_indication= 0x00; // simple 00915 } 00916 00917 if(s->avctx->level != FF_LEVEL_UNKNOWN){ 00918 profile_and_level_indication |= s->avctx->level; 00919 }else{ 00920 profile_and_level_indication |= 1; //level 1 00921 } 00922 00923 if(profile_and_level_indication>>4 == 0xF){ 00924 vo_ver_id= 5; 00925 }else{ 00926 vo_ver_id= 1; 00927 } 00928 00929 //FIXME levels 00930 00931 put_bits(&s->pb, 16, 0); 00932 put_bits(&s->pb, 16, VOS_STARTCODE); 00933 00934 put_bits(&s->pb, 8, profile_and_level_indication); 00935 00936 put_bits(&s->pb, 16, 0); 00937 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE); 00938 00939 put_bits(&s->pb, 1, 1); 00940 put_bits(&s->pb, 4, vo_ver_id); 00941 put_bits(&s->pb, 3, 1); //priority 00942 00943 put_bits(&s->pb, 4, 1); //visual obj type== video obj 00944 00945 put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME 00946 00947 ff_mpeg4_stuffing(&s->pb); 00948 } 00949 00950 static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number) 00951 { 00952 int vo_ver_id; 00953 00954 if (!CONFIG_MPEG4_ENCODER) return; 00955 00956 if(s->max_b_frames || s->quarter_sample){ 00957 vo_ver_id= 5; 00958 s->vo_type= ADV_SIMPLE_VO_TYPE; 00959 }else{ 00960 vo_ver_id= 1; 00961 s->vo_type= SIMPLE_VO_TYPE; 00962 } 00963 00964 put_bits(&s->pb, 16, 0); 00965 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */ 00966 put_bits(&s->pb, 16, 0); 00967 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */ 00968 00969 put_bits(&s->pb, 1, 0); /* random access vol */ 00970 put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */ 00971 if(s->workaround_bugs & FF_BUG_MS) { 00972 put_bits(&s->pb, 1, 0); /* is obj layer id= no */ 00973 } else { 00974 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */ 00975 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */ 00976 put_bits(&s->pb, 3, 1); /* is obj layer priority */ 00977 } 00978 00979 s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); 00980 00981 put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */ 00982 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){ 00983 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); 00984 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); 00985 } 00986 00987 if(s->workaround_bugs & FF_BUG_MS) { // 00988 put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */ 00989 } else { 00990 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */ 00991 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */ 00992 put_bits(&s->pb, 1, s->low_delay); 00993 put_bits(&s->pb, 1, 0); /* vbv parameters= no */ 00994 } 00995 00996 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */ 00997 put_bits(&s->pb, 1, 1); /* marker bit */ 00998 00999 put_bits(&s->pb, 16, s->avctx->time_base.den); 01000 if (s->time_increment_bits < 1) 01001 s->time_increment_bits = 1; 01002 put_bits(&s->pb, 1, 1); /* marker bit */ 01003 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */ 01004 put_bits(&s->pb, 1, 1); /* marker bit */ 01005 put_bits(&s->pb, 13, s->width); /* vol width */ 01006 put_bits(&s->pb, 1, 1); /* marker bit */ 01007 put_bits(&s->pb, 13, s->height); /* vol height */ 01008 put_bits(&s->pb, 1, 1); /* marker bit */ 01009 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1); 01010 put_bits(&s->pb, 1, 1); /* obmc disable */ 01011 if (vo_ver_id == 1) { 01012 put_bits(&s->pb, 1, s->vol_sprite_usage); /* sprite enable */ 01013 }else{ 01014 put_bits(&s->pb, 2, s->vol_sprite_usage); /* sprite enable */ 01015 } 01016 01017 put_bits(&s->pb, 1, 0); /* not 8 bit == false */ 01018 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/ 01019 01020 if(s->mpeg_quant){ 01021 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); 01022 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); 01023 } 01024 01025 if (vo_ver_id != 1) 01026 put_bits(&s->pb, 1, s->quarter_sample); 01027 put_bits(&s->pb, 1, 1); /* complexity estimation disable */ 01028 s->resync_marker= s->rtp_mode; 01029 put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */ 01030 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0); 01031 if(s->data_partitioning){ 01032 put_bits(&s->pb, 1, 0); /* no rvlc */ 01033 } 01034 01035 if (vo_ver_id != 1){ 01036 put_bits(&s->pb, 1, 0); /* newpred */ 01037 put_bits(&s->pb, 1, 0); /* reduced res vop */ 01038 } 01039 put_bits(&s->pb, 1, 0); /* scalability */ 01040 01041 ff_mpeg4_stuffing(&s->pb); 01042 01043 /* user data */ 01044 if(!(s->flags & CODEC_FLAG_BITEXACT)){ 01045 put_bits(&s->pb, 16, 0); 01046 put_bits(&s->pb, 16, 0x1B2); /* user_data */ 01047 ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0); 01048 } 01049 } 01050 01051 /* write mpeg4 VOP header */ 01052 void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number) 01053 { 01054 int time_incr; 01055 int time_div, time_mod; 01056 01057 if(s->pict_type==AV_PICTURE_TYPE_I){ 01058 if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){ 01059 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy 01060 mpeg4_encode_visual_object_header(s); 01061 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy 01062 mpeg4_encode_vol_header(s, 0, 0); 01063 } 01064 if(!(s->workaround_bugs & FF_BUG_MS)) 01065 mpeg4_encode_gop_header(s); 01066 } 01067 01068 s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B; 01069 01070 put_bits(&s->pb, 16, 0); /* vop header */ 01071 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */ 01072 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */ 01073 01074 assert(s->time>=0); 01075 time_div= s->time/s->avctx->time_base.den; 01076 time_mod= s->time%s->avctx->time_base.den; 01077 time_incr= time_div - s->last_time_base; 01078 assert(time_incr >= 0); 01079 while(time_incr--) 01080 put_bits(&s->pb, 1, 1); 01081 01082 put_bits(&s->pb, 1, 0); 01083 01084 put_bits(&s->pb, 1, 1); /* marker */ 01085 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */ 01086 put_bits(&s->pb, 1, 1); /* marker */ 01087 put_bits(&s->pb, 1, 1); /* vop coded */ 01088 if ( s->pict_type == AV_PICTURE_TYPE_P 01089 || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) { 01090 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */ 01091 } 01092 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */ 01093 if(!s->progressive_sequence){ 01094 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first); 01095 put_bits(&s->pb, 1, s->alternate_scan); 01096 } 01097 //FIXME sprite stuff 01098 01099 put_bits(&s->pb, 5, s->qscale); 01100 01101 if (s->pict_type != AV_PICTURE_TYPE_I) 01102 put_bits(&s->pb, 3, s->f_code); /* fcode_for */ 01103 if (s->pict_type == AV_PICTURE_TYPE_B) 01104 put_bits(&s->pb, 3, s->b_code); /* fcode_back */ 01105 } 01106 01107 01108 static void init_uni_dc_tab(void) 01109 { 01110 int level, uni_code, uni_len; 01111 01112 for(level=-256; level<256; level++){ 01113 int size, v, l; 01114 /* find number of bits */ 01115 size = 0; 01116 v = abs(level); 01117 while (v) { 01118 v >>= 1; 01119 size++; 01120 } 01121 01122 if (level < 0) 01123 l= (-level) ^ ((1 << size) - 1); 01124 else 01125 l= level; 01126 01127 /* luminance */ 01128 uni_code= ff_mpeg4_DCtab_lum[size][0]; 01129 uni_len = ff_mpeg4_DCtab_lum[size][1]; 01130 01131 if (size > 0) { 01132 uni_code<<=size; uni_code|=l; 01133 uni_len+=size; 01134 if (size > 8){ 01135 uni_code<<=1; uni_code|=1; 01136 uni_len++; 01137 } 01138 } 01139 uni_DCtab_lum_bits[level+256]= uni_code; 01140 uni_DCtab_lum_len [level+256]= uni_len; 01141 01142 /* chrominance */ 01143 uni_code= ff_mpeg4_DCtab_chrom[size][0]; 01144 uni_len = ff_mpeg4_DCtab_chrom[size][1]; 01145 01146 if (size > 0) { 01147 uni_code<<=size; uni_code|=l; 01148 uni_len+=size; 01149 if (size > 8){ 01150 uni_code<<=1; uni_code|=1; 01151 uni_len++; 01152 } 01153 } 01154 uni_DCtab_chrom_bits[level+256]= uni_code; 01155 uni_DCtab_chrom_len [level+256]= uni_len; 01156 01157 } 01158 } 01159 01160 static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){ 01161 int slevel, run, last; 01162 01163 assert(MAX_LEVEL >= 64); 01164 assert(MAX_RUN >= 63); 01165 01166 for(slevel=-64; slevel<64; slevel++){ 01167 if(slevel==0) continue; 01168 for(run=0; run<64; run++){ 01169 for(last=0; last<=1; last++){ 01170 const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64); 01171 int level= slevel < 0 ? -slevel : slevel; 01172 int sign= slevel < 0 ? 1 : 0; 01173 int bits, len, code; 01174 int level1, run1; 01175 01176 len_tab[index]= 100; 01177 01178 /* ESC0 */ 01179 code= get_rl_index(rl, last, run, level); 01180 bits= rl->table_vlc[code][0]; 01181 len= rl->table_vlc[code][1]; 01182 bits=bits*2+sign; len++; 01183 01184 if(code!=rl->n && len < len_tab[index]){ 01185 bits_tab[index]= bits; 01186 len_tab [index]= len; 01187 } 01188 /* ESC1 */ 01189 bits= rl->table_vlc[rl->n][0]; 01190 len= rl->table_vlc[rl->n][1]; 01191 bits=bits*2; len++; //esc1 01192 level1= level - rl->max_level[last][run]; 01193 if(level1>0){ 01194 code= get_rl_index(rl, last, run, level1); 01195 bits<<= rl->table_vlc[code][1]; 01196 len += rl->table_vlc[code][1]; 01197 bits += rl->table_vlc[code][0]; 01198 bits=bits*2+sign; len++; 01199 01200 if(code!=rl->n && len < len_tab[index]){ 01201 bits_tab[index]= bits; 01202 len_tab [index]= len; 01203 } 01204 } 01205 /* ESC2 */ 01206 bits= rl->table_vlc[rl->n][0]; 01207 len= rl->table_vlc[rl->n][1]; 01208 bits=bits*4+2; len+=2; //esc2 01209 run1 = run - rl->max_run[last][level] - 1; 01210 if(run1>=0){ 01211 code= get_rl_index(rl, last, run1, level); 01212 bits<<= rl->table_vlc[code][1]; 01213 len += rl->table_vlc[code][1]; 01214 bits += rl->table_vlc[code][0]; 01215 bits=bits*2+sign; len++; 01216 01217 if(code!=rl->n && len < len_tab[index]){ 01218 bits_tab[index]= bits; 01219 len_tab [index]= len; 01220 } 01221 } 01222 /* ESC3 */ 01223 bits= rl->table_vlc[rl->n][0]; 01224 len = rl->table_vlc[rl->n][1]; 01225 bits=bits*4+3; len+=2; //esc3 01226 bits=bits*2+last; len++; 01227 bits=bits*64+run; len+=6; 01228 bits=bits*2+1; len++; //marker 01229 bits=bits*4096+(slevel&0xfff); len+=12; 01230 bits=bits*2+1; len++; //marker 01231 01232 if(len < len_tab[index]){ 01233 bits_tab[index]= bits; 01234 len_tab [index]= len; 01235 } 01236 } 01237 } 01238 } 01239 } 01240 01241 static av_cold int encode_init(AVCodecContext *avctx) 01242 { 01243 MpegEncContext *s = avctx->priv_data; 01244 int ret; 01245 static int done = 0; 01246 01247 if((ret=MPV_encode_init(avctx)) < 0) 01248 return ret; 01249 01250 if (!done) { 01251 done = 1; 01252 01253 init_uni_dc_tab(); 01254 01255 init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]); 01256 01257 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len); 01258 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len); 01259 } 01260 01261 s->min_qcoeff= -2048; 01262 s->max_qcoeff= 2047; 01263 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len; 01264 s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64; 01265 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len; 01266 s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64; 01267 s->luma_dc_vlc_length= uni_DCtab_lum_len; 01268 s->chroma_dc_vlc_length= uni_DCtab_chrom_len; 01269 s->ac_esc_length= 7+2+1+6+1+12+1; 01270 s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; 01271 s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; 01272 01273 if(s->flags & CODEC_FLAG_GLOBAL_HEADER){ 01274 01275 s->avctx->extradata= av_malloc(1024); 01276 init_put_bits(&s->pb, s->avctx->extradata, 1024); 01277 01278 if(!(s->workaround_bugs & FF_BUG_MS)) 01279 mpeg4_encode_visual_object_header(s); 01280 mpeg4_encode_vol_header(s, 0, 0); 01281 01282 // ff_mpeg4_stuffing(&s->pb); ? 01283 flush_put_bits(&s->pb); 01284 s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3; 01285 } 01286 return 0; 01287 } 01288 01289 void ff_mpeg4_init_partitions(MpegEncContext *s) 01290 { 01291 uint8_t *start= put_bits_ptr(&s->pb); 01292 uint8_t *end= s->pb.buf_end; 01293 int size= end - start; 01294 int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start; 01295 int tex_size= (size - 2*pb_size)&(~3); 01296 01297 set_put_bits_buffer_size(&s->pb, pb_size); 01298 init_put_bits(&s->tex_pb, start + pb_size , tex_size); 01299 init_put_bits(&s->pb2 , start + pb_size + tex_size, pb_size); 01300 } 01301 01302 void ff_mpeg4_merge_partitions(MpegEncContext *s) 01303 { 01304 const int pb2_len = put_bits_count(&s->pb2 ); 01305 const int tex_pb_len= put_bits_count(&s->tex_pb); 01306 const int bits= put_bits_count(&s->pb); 01307 01308 if(s->pict_type==AV_PICTURE_TYPE_I){ 01309 put_bits(&s->pb, 19, DC_MARKER); 01310 s->misc_bits+=19 + pb2_len + bits - s->last_bits; 01311 s->i_tex_bits+= tex_pb_len; 01312 }else{ 01313 put_bits(&s->pb, 17, MOTION_MARKER); 01314 s->misc_bits+=17 + pb2_len; 01315 s->mv_bits+= bits - s->last_bits; 01316 s->p_tex_bits+= tex_pb_len; 01317 } 01318 01319 flush_put_bits(&s->pb2); 01320 flush_put_bits(&s->tex_pb); 01321 01322 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf); 01323 ff_copy_bits(&s->pb, s->pb2.buf , pb2_len); 01324 ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len); 01325 s->last_bits= put_bits_count(&s->pb); 01326 } 01327 01328 01329 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s) 01330 { 01331 int mb_num_bits= av_log2(s->mb_num - 1) + 1; 01332 01333 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0); 01334 put_bits(&s->pb, 1, 1); 01335 01336 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width); 01337 put_bits(&s->pb, s->quant_precision, s->qscale); 01338 put_bits(&s->pb, 1, 0); /* no HEC */ 01339 } 01340 01341 AVCodec ff_mpeg4_encoder = { 01342 "mpeg4", 01343 AVMEDIA_TYPE_VIDEO, 01344 CODEC_ID_MPEG4, 01345 sizeof(MpegEncContext), 01346 encode_init, 01347 MPV_encode_picture, 01348 MPV_encode_end, 01349 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE}, 01350 .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS, 01351 .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), 01352 };