00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00028 #include "avcodec.h"
00029 #include "dsputil.h"
00030 #include "mpegvideo.h"
00031 #include "h263_parser.h"
00032 #include "mpeg4video_parser.h"
00033 #include "msmpeg4.h"
00034
00035
00036
00037
00038 int ff_h263_decode_init(AVCodecContext *avctx)
00039 {
00040 MpegEncContext *s = avctx->priv_data;
00041
00042 s->avctx = avctx;
00043 s->out_format = FMT_H263;
00044
00045 s->width = avctx->coded_width;
00046 s->height = avctx->coded_height;
00047 s->workaround_bugs= avctx->workaround_bugs;
00048
00049
00050 MPV_decode_defaults(s);
00051 s->quant_precision=5;
00052 s->decode_mb= ff_h263_decode_mb;
00053 s->low_delay= 1;
00054 avctx->pix_fmt= PIX_FMT_YUV420P;
00055 s->unrestricted_mv= 1;
00056
00057
00058 switch(avctx->codec->id) {
00059 case CODEC_ID_H263:
00060 s->unrestricted_mv= 0;
00061 break;
00062 case CODEC_ID_MPEG4:
00063 s->decode_mb= ff_mpeg4_decode_mb;
00064 s->time_increment_bits = 4;
00065 s->h263_pred = 1;
00066 s->low_delay = 0;
00067 break;
00068 case CODEC_ID_MSMPEG4V1:
00069 s->h263_msmpeg4 = 1;
00070 s->h263_pred = 1;
00071 s->msmpeg4_version=1;
00072 break;
00073 case CODEC_ID_MSMPEG4V2:
00074 s->h263_msmpeg4 = 1;
00075 s->h263_pred = 1;
00076 s->msmpeg4_version=2;
00077 break;
00078 case CODEC_ID_MSMPEG4V3:
00079 s->h263_msmpeg4 = 1;
00080 s->h263_pred = 1;
00081 s->msmpeg4_version=3;
00082 break;
00083 case CODEC_ID_WMV1:
00084 s->h263_msmpeg4 = 1;
00085 s->h263_pred = 1;
00086 s->msmpeg4_version=4;
00087 break;
00088 case CODEC_ID_WMV2:
00089 s->h263_msmpeg4 = 1;
00090 s->h263_pred = 1;
00091 s->msmpeg4_version=5;
00092 break;
00093 case CODEC_ID_VC1:
00094 case CODEC_ID_WMV3:
00095 s->h263_msmpeg4 = 1;
00096 s->h263_pred = 1;
00097 s->msmpeg4_version=6;
00098 break;
00099 case CODEC_ID_H263I:
00100 break;
00101 case CODEC_ID_FLV1:
00102 s->h263_flv = 1;
00103 break;
00104 default:
00105 return -1;
00106 }
00107 s->codec_id= avctx->codec->id;
00108
00109
00110 if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
00111 if (MPV_common_init(s) < 0)
00112 return -1;
00113
00114 if (ENABLE_MSMPEG4_DECODER && s->h263_msmpeg4)
00115 ff_msmpeg4_decode_init(s);
00116 else
00117 h263_decode_init_vlc(s);
00118
00119 return 0;
00120 }
00121
00122 int ff_h263_decode_end(AVCodecContext *avctx)
00123 {
00124 MpegEncContext *s = avctx->priv_data;
00125
00126 MPV_common_end(s);
00127 return 0;
00128 }
00129
00133 static int get_consumed_bytes(MpegEncContext *s, int buf_size){
00134 int pos= (get_bits_count(&s->gb)+7)>>3;
00135
00136 if(s->divx_packed){
00137
00138 return buf_size;
00139 }else if(s->flags&CODEC_FLAG_TRUNCATED){
00140 pos -= s->parse_context.last_index;
00141 if(pos<0) pos=0;
00142 return pos;
00143 }else{
00144 if(pos==0) pos=1;
00145 if(pos+10>buf_size) pos=buf_size;
00146
00147 return pos;
00148 }
00149 }
00150
00151 static int decode_slice(MpegEncContext *s){
00152 const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
00153 const int mb_size= 16>>s->avctx->lowres;
00154 s->last_resync_gb= s->gb;
00155 s->first_slice_line= 1;
00156
00157 s->resync_mb_x= s->mb_x;
00158 s->resync_mb_y= s->mb_y;
00159
00160 ff_set_qscale(s, s->qscale);
00161
00162 if(s->partitioned_frame){
00163 const int qscale= s->qscale;
00164
00165 if(s->codec_id==CODEC_ID_MPEG4){
00166 if(ff_mpeg4_decode_partitions(s) < 0)
00167 return -1;
00168 }
00169
00170
00171 s->first_slice_line=1;
00172 s->mb_x= s->resync_mb_x;
00173 s->mb_y= s->resync_mb_y;
00174 ff_set_qscale(s, qscale);
00175 }
00176
00177 for(; s->mb_y < s->mb_height; s->mb_y++) {
00178
00179 if(s->msmpeg4_version){
00180 if(s->resync_mb_y + s->slice_height == s->mb_y){
00181 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
00182
00183 return 0;
00184 }
00185 }
00186
00187 if(s->msmpeg4_version==1){
00188 s->last_dc[0]=
00189 s->last_dc[1]=
00190 s->last_dc[2]= 128;
00191 }
00192
00193 ff_init_block_index(s);
00194 for(; s->mb_x < s->mb_width; s->mb_x++) {
00195 int ret;
00196
00197 ff_update_block_index(s);
00198
00199 if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
00200 s->first_slice_line=0;
00201 }
00202
00203
00204
00205 s->mv_dir = MV_DIR_FORWARD;
00206 s->mv_type = MV_TYPE_16X16;
00207
00208
00209 ret= s->decode_mb(s, s->block);
00210
00211 if (s->pict_type!=B_TYPE)
00212 ff_h263_update_motion_val(s);
00213
00214 if(ret<0){
00215 const int xy= s->mb_x + s->mb_y*s->mb_stride;
00216 if(ret==SLICE_END){
00217 MPV_decode_mb(s, s->block);
00218 if(s->loop_filter)
00219 ff_h263_loop_filter(s);
00220
00221
00222 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
00223
00224 s->padding_bug_score--;
00225
00226 if(++s->mb_x >= s->mb_width){
00227 s->mb_x=0;
00228 ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
00229 s->mb_y++;
00230 }
00231 return 0;
00232 }else if(ret==SLICE_NOEND){
00233 av_log(s->avctx, AV_LOG_ERROR, "Slice mismatch at MB: %d\n", xy);
00234 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x+1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
00235 return -1;
00236 }
00237 av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
00238 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
00239
00240 return -1;
00241 }
00242
00243 MPV_decode_mb(s, s->block);
00244 if(s->loop_filter)
00245 ff_h263_loop_filter(s);
00246 }
00247
00248 ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
00249
00250 s->mb_x= 0;
00251 }
00252
00253 assert(s->mb_x==0 && s->mb_y==s->mb_height);
00254
00255
00256 if( s->codec_id==CODEC_ID_MPEG4
00257 && (s->workaround_bugs&FF_BUG_AUTODETECT)
00258 && s->gb.size_in_bits - get_bits_count(&s->gb) >=0
00259 && s->gb.size_in_bits - get_bits_count(&s->gb) < 48
00260
00261 && !s->data_partitioning){
00262
00263 const int bits_count= get_bits_count(&s->gb);
00264 const int bits_left = s->gb.size_in_bits - bits_count;
00265
00266 if(bits_left==0){
00267 s->padding_bug_score+=16;
00268 } else if(bits_left != 1){
00269 int v= show_bits(&s->gb, 8);
00270 v|= 0x7F >> (7-(bits_count&7));
00271
00272 if(v==0x7F && bits_left<=8)
00273 s->padding_bug_score--;
00274 else if(v==0x7F && ((get_bits_count(&s->gb)+8)&8) && bits_left<=16)
00275 s->padding_bug_score+= 4;
00276 else
00277 s->padding_bug_score++;
00278 }
00279 }
00280
00281 if(s->workaround_bugs&FF_BUG_AUTODETECT){
00282 if(s->padding_bug_score > -2 && !s->data_partitioning )
00283 s->workaround_bugs |= FF_BUG_NO_PADDING;
00284 else
00285 s->workaround_bugs &= ~FF_BUG_NO_PADDING;
00286 }
00287
00288
00289 if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){
00290 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
00291 int max_extra=7;
00292
00293
00294 if(s->msmpeg4_version && s->pict_type==I_TYPE)
00295 max_extra+= 17;
00296
00297
00298 if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3)
00299 max_extra+= 48;
00300 else if((s->workaround_bugs&FF_BUG_NO_PADDING))
00301 max_extra+= 256*256*256*64;
00302
00303 if(left>max_extra){
00304 av_log(s->avctx, AV_LOG_ERROR, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
00305 }
00306 else if(left<0){
00307 av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
00308 }else
00309 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
00310
00311 return 0;
00312 }
00313
00314 av_log(s->avctx, AV_LOG_ERROR, "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
00315 s->gb.size_in_bits - get_bits_count(&s->gb),
00316 show_bits(&s->gb, 24), s->padding_bug_score);
00317
00318 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
00319
00320 return -1;
00321 }
00322
00323 int ff_h263_decode_frame(AVCodecContext *avctx,
00324 void *data, int *data_size,
00325 const uint8_t *buf, int buf_size)
00326 {
00327 MpegEncContext *s = avctx->priv_data;
00328 int ret;
00329 AVFrame *pict = data;
00330
00331 #ifdef PRINT_FRAME_TIME
00332 uint64_t time= rdtsc();
00333 #endif
00334 #ifdef DEBUG
00335 av_log(avctx, AV_LOG_DEBUG, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
00336 if(buf_size>0)
00337 av_log(avctx, AV_LOG_DEBUG, "bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
00338 #endif
00339 s->flags= avctx->flags;
00340 s->flags2= avctx->flags2;
00341
00342
00343 if (buf_size == 0) {
00344
00345 if (s->low_delay==0 && s->next_picture_ptr) {
00346 *pict= *(AVFrame*)s->next_picture_ptr;
00347 s->next_picture_ptr= NULL;
00348
00349 *data_size = sizeof(AVFrame);
00350 }
00351
00352 return 0;
00353 }
00354
00355 if(s->flags&CODEC_FLAG_TRUNCATED){
00356 int next;
00357
00358 if(s->codec_id==CODEC_ID_MPEG4){
00359 next= ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
00360 }else if(s->codec_id==CODEC_ID_H263){
00361 next= ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
00362 }else{
00363 av_log(s->avctx, AV_LOG_ERROR, "this codec does not support truncated bitstreams\n");
00364 return -1;
00365 }
00366
00367 if( ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
00368 return buf_size;
00369 }
00370
00371
00372 retry:
00373
00374 if(s->bitstream_buffer_size && (s->divx_packed || buf_size<20)){
00375 init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8);
00376 }else
00377 init_get_bits(&s->gb, buf, buf_size*8);
00378 s->bitstream_buffer_size=0;
00379
00380 if (!s->context_initialized) {
00381 if (MPV_common_init(s) < 0)
00382 return -1;
00383 }
00384
00385
00386
00387 if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
00388 int i= ff_find_unused_picture(s, 0);
00389 s->current_picture_ptr= &s->picture[i];
00390 }
00391
00392
00393 if (ENABLE_WMV2_DECODER && s->msmpeg4_version==5) {
00394 ret= ff_wmv2_decode_picture_header(s);
00395 } else if (ENABLE_MSMPEG4_DECODER && s->msmpeg4_version) {
00396 ret = msmpeg4_decode_picture_header(s);
00397 } else if (s->h263_pred) {
00398 if(s->avctx->extradata_size && s->picture_number==0){
00399 GetBitContext gb;
00400
00401 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
00402 ret = ff_mpeg4_decode_picture_header(s, &gb);
00403 }
00404 ret = ff_mpeg4_decode_picture_header(s, &s->gb);
00405
00406 if(s->flags& CODEC_FLAG_LOW_DELAY)
00407 s->low_delay=1;
00408 } else if (s->codec_id == CODEC_ID_H263I) {
00409 ret = intel_h263_decode_picture_header(s);
00410 } else if (s->h263_flv) {
00411 ret = flv_h263_decode_picture_header(s);
00412 } else {
00413 ret = h263_decode_picture_header(s);
00414 }
00415
00416 if(ret==FRAME_SKIPPED) return get_consumed_bytes(s, buf_size);
00417
00418
00419 if (ret < 0){
00420 av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
00421 return -1;
00422 }
00423
00424 avctx->has_b_frames= !s->low_delay;
00425
00426 if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
00427 if(s->stream_codec_tag == ff_get_fourcc("XVID") ||
00428 s->codec_tag == ff_get_fourcc("XVID") || s->codec_tag == ff_get_fourcc("XVIX") ||
00429 s->codec_tag == ff_get_fourcc("RMP4"))
00430 s->xvid_build= -1;
00431 #if 0
00432 if(s->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==1
00433 && s->padding_bug_score > 0 && s->low_delay)
00434 s->xvid_build= -1;
00435 #endif
00436 }
00437
00438 if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
00439 if(s->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==0)
00440 s->divx_version= 400;
00441 }
00442
00443 if(s->xvid_build && s->divx_version){
00444 s->divx_version=
00445 s->divx_build= 0;
00446 }
00447
00448 if(s->workaround_bugs&FF_BUG_AUTODETECT){
00449 if(s->codec_tag == ff_get_fourcc("XVIX"))
00450 s->workaround_bugs|= FF_BUG_XVID_ILACE;
00451
00452 if(s->codec_tag == ff_get_fourcc("UMP4")){
00453 s->workaround_bugs|= FF_BUG_UMP4;
00454 }
00455
00456 if(s->divx_version>=500 && s->divx_build<1814){
00457 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
00458 }
00459
00460 if(s->divx_version>502 && s->divx_build<1814){
00461 s->workaround_bugs|= FF_BUG_QPEL_CHROMA2;
00462 }
00463
00464 if(s->xvid_build && s->xvid_build<=3)
00465 s->padding_bug_score= 256*256*256*64;
00466
00467 if(s->xvid_build && s->xvid_build<=1)
00468 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
00469
00470 if(s->xvid_build && s->xvid_build<=12)
00471 s->workaround_bugs|= FF_BUG_EDGE;
00472
00473 if(s->xvid_build && s->xvid_build<=32)
00474 s->workaround_bugs|= FF_BUG_DC_CLIP;
00475
00476 #define SET_QPEL_FUNC(postfix1, postfix2) \
00477 s->dsp.put_ ## postfix1 = ff_put_ ## postfix2;\
00478 s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2;\
00479 s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2;
00480
00481 if(s->lavc_build && s->lavc_build<4653)
00482 s->workaround_bugs|= FF_BUG_STD_QPEL;
00483
00484 if(s->lavc_build && s->lavc_build<4655)
00485 s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
00486
00487 if(s->lavc_build && s->lavc_build<4670){
00488 s->workaround_bugs|= FF_BUG_EDGE;
00489 }
00490
00491 if(s->lavc_build && s->lavc_build<=4712)
00492 s->workaround_bugs|= FF_BUG_DC_CLIP;
00493
00494 if(s->divx_version)
00495 s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
00496
00497 if(s->divx_version==501 && s->divx_build==20020416)
00498 s->padding_bug_score= 256*256*256*64;
00499
00500 if(s->divx_version && s->divx_version<500){
00501 s->workaround_bugs|= FF_BUG_EDGE;
00502 }
00503
00504 if(s->divx_version)
00505 s->workaround_bugs|= FF_BUG_HPEL_CHROMA;
00506 #if 0
00507 if(s->divx_version==500)
00508 s->padding_bug_score= 256*256*256*64;
00509
00510
00511
00512
00513 if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0
00514 && s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
00515 s->workaround_bugs|= FF_BUG_NO_PADDING;
00516
00517 if(s->lavc_build && s->lavc_build<4609)
00518 s->workaround_bugs|= FF_BUG_NO_PADDING;
00519 #endif
00520 }
00521
00522 if(s->workaround_bugs& FF_BUG_STD_QPEL){
00523 SET_QPEL_FUNC(qpel_pixels_tab[0][ 5], qpel16_mc11_old_c)
00524 SET_QPEL_FUNC(qpel_pixels_tab[0][ 7], qpel16_mc31_old_c)
00525 SET_QPEL_FUNC(qpel_pixels_tab[0][ 9], qpel16_mc12_old_c)
00526 SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c)
00527 SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c)
00528 SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c)
00529
00530 SET_QPEL_FUNC(qpel_pixels_tab[1][ 5], qpel8_mc11_old_c)
00531 SET_QPEL_FUNC(qpel_pixels_tab[1][ 7], qpel8_mc31_old_c)
00532 SET_QPEL_FUNC(qpel_pixels_tab[1][ 9], qpel8_mc12_old_c)
00533 SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c)
00534 SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c)
00535 SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
00536 }
00537
00538 if(avctx->debug & FF_DEBUG_BUGS)
00539 av_log(s->avctx, AV_LOG_DEBUG, "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n",
00540 s->workaround_bugs, s->lavc_build, s->xvid_build, s->divx_version, s->divx_build,
00541 s->divx_packed ? "p" : "");
00542
00543 #if 0 // dump bits per frame / qp / complexity
00544 {
00545 static FILE *f=NULL;
00546 if(!f) f=fopen("rate_qp_cplx.txt", "w");
00547 fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
00548 }
00549 #endif
00550
00551 #if defined(HAVE_MMX) && defined(CONFIG_GPL)
00552 if(s->codec_id == CODEC_ID_MPEG4 && s->xvid_build && avctx->idct_algo == FF_IDCT_AUTO && (mm_flags & MM_MMX)){
00553 avctx->idct_algo= FF_IDCT_XVIDMMX;
00554 avctx->coded_width= 0;
00555
00556 s->picture_number=0;
00557 }
00558 #endif
00559
00560
00561
00562
00563
00564
00565 if ( s->width != avctx->coded_width
00566 || s->height != avctx->coded_height) {
00567
00568 ParseContext pc= s->parse_context;
00569 s->parse_context.buffer=0;
00570 MPV_common_end(s);
00571 s->parse_context= pc;
00572 }
00573 if (!s->context_initialized) {
00574 avcodec_set_dimensions(avctx, s->width, s->height);
00575
00576 goto retry;
00577 }
00578
00579 if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P))
00580 s->gob_index = ff_h263_get_gob_height(s);
00581
00582
00583 s->current_picture.pict_type= s->pict_type;
00584 s->current_picture.key_frame= s->pict_type == I_TYPE;
00585
00586
00587 if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)) return get_consumed_bytes(s, buf_size);
00588
00589 if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
00590 if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
00591 || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
00592 || avctx->skip_frame >= AVDISCARD_ALL)
00593 return get_consumed_bytes(s, buf_size);
00594
00595 if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
00596
00597 if(s->next_p_frame_damaged){
00598 if(s->pict_type==B_TYPE)
00599 return get_consumed_bytes(s, buf_size);
00600 else
00601 s->next_p_frame_damaged=0;
00602 }
00603
00604 if((s->avctx->flags2 & CODEC_FLAG2_FAST) && s->pict_type==B_TYPE){
00605 s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
00606 s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
00607 }else if((!s->no_rounding) || s->pict_type==B_TYPE){
00608 s->me.qpel_put= s->dsp.put_qpel_pixels_tab;
00609 s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
00610 }else{
00611 s->me.qpel_put= s->dsp.put_no_rnd_qpel_pixels_tab;
00612 s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
00613 }
00614
00615 if(MPV_frame_start(s, avctx) < 0)
00616 return -1;
00617
00618 #ifdef DEBUG
00619 av_log(avctx, AV_LOG_DEBUG, "qscale=%d\n", s->qscale);
00620 #endif
00621
00622 ff_er_frame_start(s);
00623
00624
00625
00626 if (ENABLE_WMV2_DECODER && s->msmpeg4_version==5){
00627 ret = ff_wmv2_decode_secondary_picture_header(s);
00628 if(ret<0) return ret;
00629 if(ret==1) goto intrax8_decoded;
00630 }
00631
00632
00633 s->mb_x=0;
00634 s->mb_y=0;
00635
00636 decode_slice(s);
00637 while(s->mb_y<s->mb_height){
00638 if(s->msmpeg4_version){
00639 if(s->slice_height==0 || s->mb_x!=0 || (s->mb_y%s->slice_height)!=0 || get_bits_count(&s->gb) > s->gb.size_in_bits)
00640 break;
00641 }else{
00642 if(ff_h263_resync(s)<0)
00643 break;
00644 }
00645
00646 if(s->msmpeg4_version<4 && s->h263_pred)
00647 ff_mpeg4_clean_buffers(s);
00648
00649 decode_slice(s);
00650 }
00651
00652 if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
00653 if(!ENABLE_MSMPEG4_DECODER || msmpeg4_decode_ext_header(s, buf_size) < 0){
00654 s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR;
00655 }
00656
00657
00658 if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_packed){
00659 int current_pos= get_bits_count(&s->gb)>>3;
00660 int startcode_found=0;
00661
00662 if(buf_size - current_pos > 5){
00663 int i;
00664 for(i=current_pos; i<buf_size-3; i++){
00665 if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
00666 startcode_found=1;
00667 break;
00668 }
00669 }
00670 }
00671 if(s->gb.buffer == s->bitstream_buffer && buf_size>20){
00672 startcode_found=1;
00673 current_pos=0;
00674 }
00675
00676 if(startcode_found){
00677 s->bitstream_buffer= av_fast_realloc(
00678 s->bitstream_buffer,
00679 &s->allocated_bitstream_buffer_size,
00680 buf_size - current_pos + FF_INPUT_BUFFER_PADDING_SIZE);
00681 memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
00682 s->bitstream_buffer_size= buf_size - current_pos;
00683 }
00684 }
00685
00686 intrax8_decoded:
00687 ff_er_frame_end(s);
00688
00689 MPV_frame_end(s);
00690
00691 assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
00692 assert(s->current_picture.pict_type == s->pict_type);
00693 if (s->pict_type == B_TYPE || s->low_delay) {
00694 *pict= *(AVFrame*)s->current_picture_ptr;
00695 } else if (s->last_picture_ptr != NULL) {
00696 *pict= *(AVFrame*)s->last_picture_ptr;
00697 }
00698
00699 if(s->last_picture_ptr || s->low_delay){
00700 *data_size = sizeof(AVFrame);
00701 ff_print_debug_info(s, pict);
00702 }
00703
00704
00705
00706 avctx->frame_number = s->picture_number - 1;
00707
00708 #ifdef PRINT_FRAME_TIME
00709 av_log(avctx, AV_LOG_DEBUG, "%"PRId64"\n", rdtsc()-time);
00710 #endif
00711
00712 return get_consumed_bytes(s, buf_size);
00713 }
00714
00715 AVCodec mpeg4_decoder = {
00716 "mpeg4",
00717 CODEC_TYPE_VIDEO,
00718 CODEC_ID_MPEG4,
00719 sizeof(MpegEncContext),
00720 ff_h263_decode_init,
00721 NULL,
00722 ff_h263_decode_end,
00723 ff_h263_decode_frame,
00724 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
00725 .flush= ff_mpeg_flush,
00726 };
00727
00728 AVCodec h263_decoder = {
00729 "h263",
00730 CODEC_TYPE_VIDEO,
00731 CODEC_ID_H263,
00732 sizeof(MpegEncContext),
00733 ff_h263_decode_init,
00734 NULL,
00735 ff_h263_decode_end,
00736 ff_h263_decode_frame,
00737 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
00738 .flush= ff_mpeg_flush,
00739 };
00740
00741 AVCodec msmpeg4v1_decoder = {
00742 "msmpeg4v1",
00743 CODEC_TYPE_VIDEO,
00744 CODEC_ID_MSMPEG4V1,
00745 sizeof(MpegEncContext),
00746 ff_h263_decode_init,
00747 NULL,
00748 ff_h263_decode_end,
00749 ff_h263_decode_frame,
00750 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
00751 };
00752
00753 AVCodec msmpeg4v2_decoder = {
00754 "msmpeg4v2",
00755 CODEC_TYPE_VIDEO,
00756 CODEC_ID_MSMPEG4V2,
00757 sizeof(MpegEncContext),
00758 ff_h263_decode_init,
00759 NULL,
00760 ff_h263_decode_end,
00761 ff_h263_decode_frame,
00762 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
00763 };
00764
00765 AVCodec msmpeg4v3_decoder = {
00766 "msmpeg4",
00767 CODEC_TYPE_VIDEO,
00768 CODEC_ID_MSMPEG4V3,
00769 sizeof(MpegEncContext),
00770 ff_h263_decode_init,
00771 NULL,
00772 ff_h263_decode_end,
00773 ff_h263_decode_frame,
00774 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
00775 };
00776
00777 AVCodec wmv1_decoder = {
00778 "wmv1",
00779 CODEC_TYPE_VIDEO,
00780 CODEC_ID_WMV1,
00781 sizeof(MpegEncContext),
00782 ff_h263_decode_init,
00783 NULL,
00784 ff_h263_decode_end,
00785 ff_h263_decode_frame,
00786 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
00787 };
00788
00789 AVCodec h263i_decoder = {
00790 "h263i",
00791 CODEC_TYPE_VIDEO,
00792 CODEC_ID_H263I,
00793 sizeof(MpegEncContext),
00794 ff_h263_decode_init,
00795 NULL,
00796 ff_h263_decode_end,
00797 ff_h263_decode_frame,
00798 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
00799 };
00800
00801 AVCodec flv_decoder = {
00802 "flv",
00803 CODEC_TYPE_VIDEO,
00804 CODEC_ID_FLV1,
00805 sizeof(MpegEncContext),
00806 ff_h263_decode_init,
00807 NULL,
00808 ff_h263_decode_end,
00809 ff_h263_decode_frame,
00810 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1
00811 };