int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size) { MpegEncContext *s = avctx->priv_data; int ret; AVFrame *pict = data; #ifdef PRINT_FRAME_TIME uint64_t time= rdtsc(); #endif #ifdef DEBUG printf("*****frame %d size=%d\n", avctx->frame_number, buf_size); printf("bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]); #endif s->flags= avctx->flags; s->flags2= avctx->flags2; /* no supplementary picture */ if (buf_size == 0) { /* special case for last picture */ if (s->low_delay==0 && s->next_picture_ptr) { *pict= *(AVFrame*)s->next_picture_ptr; s->next_picture_ptr= NULL; *data_size = sizeof(AVFrame); } return 0; } if(s->flags&CODEC_FLAG_TRUNCATED){ int next; if(s->codec_id==CODEC_ID_MPEG4){ next= ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size); }else if(s->codec_id==CODEC_ID_H263){ next= h263_find_frame_end(&s->parse_context, buf, buf_size); }else{ av_log(s->avctx, AV_LOG_ERROR, "this codec doesnt support truncated bitstreams\n"); return -1; } if( ff_combine_frame(&s->parse_context, next, &buf, &buf_size) < 0 ) return buf_size; } retry: if(s->bitstream_buffer_size && (s->divx_packed || buf_size<20)){ //divx 5.01+/xvid frame reorder init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8); }else init_get_bits(&s->gb, buf, buf_size*8); s->bitstream_buffer_size=0; if (!s->context_initialized) { if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix return -1; } //we need to set current_picture_ptr before reading the header, otherwise we cant store anyting im there if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){ int i= ff_find_unused_picture(s, 0); s->current_picture_ptr= &s->picture[i]; } /* let's go :-) */ if (s->msmpeg4_version==5) { ret= ff_wmv2_decode_picture_header(s); } else if (s->msmpeg4_version) { ret = msmpeg4_decode_picture_header(s); } else if (s->h263_pred) { if(s->avctx->extradata_size && s->picture_number==0){ GetBitContext gb; init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8); ret = ff_mpeg4_decode_picture_header(s, &gb); } ret = ff_mpeg4_decode_picture_header(s, &s->gb); if(s->flags& CODEC_FLAG_LOW_DELAY) s->low_delay=1; } else if (s->codec_id == CODEC_ID_H263I) { ret = intel_h263_decode_picture_header(s); } else if (s->h263_flv) { ret = flv_h263_decode_picture_header(s); } else { ret = h263_decode_picture_header(s); } if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size); /* skip if the header was thrashed */ if (ret < 0){ av_log(s->avctx, AV_LOG_ERROR, "header damaged\n"); return -1; } avctx->has_b_frames= !s->low_delay; if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){ if(s->avctx->stream_codec_tag == ff_get_fourcc("XVID") || s->avctx->codec_tag == ff_get_fourcc("XVID") || s->avctx->codec_tag == ff_get_fourcc("XVIX")) s->xvid_build= -1; #if 0 if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==1 && s->padding_bug_score > 0 && s->low_delay) // XVID with modified fourcc s->xvid_build= -1; #endif } if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){ if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==0) s->divx_version= 400; //divx 4 } if(s->workaround_bugs&FF_BUG_AUTODETECT){ s->workaround_bugs &= ~FF_BUG_NO_PADDING; if(s->padding_bug_score > -2 && !s->data_partitioning && (s->divx_version || !s->resync_marker)) s->workaround_bugs |= FF_BUG_NO_PADDING; if(s->avctx->codec_tag == ff_get_fourcc("XVIX")) s->workaround_bugs|= FF_BUG_XVID_ILACE; if(s->avctx->codec_tag == ff_get_fourcc("UMP4")){ s->workaround_bugs|= FF_BUG_UMP4; } if(s->divx_version>=500){ s->workaround_bugs|= FF_BUG_QPEL_CHROMA; } if(s->divx_version>502){ s->workaround_bugs|= FF_BUG_QPEL_CHROMA2; } if(s->xvid_build && s->xvid_build<=3) s->padding_bug_score= 256*256*256*64; if(s->xvid_build && s->xvid_build<=1) s->workaround_bugs|= FF_BUG_QPEL_CHROMA; if(s->xvid_build && s->xvid_build<=12) s->workaround_bugs|= FF_BUG_EDGE; if(s->xvid_build && s->xvid_build<=32) s->workaround_bugs|= FF_BUG_DC_CLIP; #define SET_QPEL_FUNC(postfix1, postfix2) \ s->dsp.put_ ## postfix1 = ff_put_ ## postfix2;\ s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2;\ s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2; if(s->lavc_build && s->lavc_build<4653) s->workaround_bugs|= FF_BUG_STD_QPEL; if(s->lavc_build && s->lavc_build<4655) s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE; if(s->lavc_build && s->lavc_build<4670){ s->workaround_bugs|= FF_BUG_EDGE; } if(s->lavc_build && s->lavc_build<=4712) s->workaround_bugs|= FF_BUG_DC_CLIP; if(s->divx_version) s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE; //printf("padding_bug_score: %d\n", s->padding_bug_score); if(s->divx_version==501 && s->divx_build==20020416) s->padding_bug_score= 256*256*256*64; if(s->divx_version && s->divx_version<500){ s->workaround_bugs|= FF_BUG_EDGE; } if(s->divx_version) s->workaround_bugs|= FF_BUG_HPEL_CHROMA; #if 0 if(s->divx_version==500) s->padding_bug_score= 256*256*256*64; /* very ugly XVID padding bug detection FIXME/XXX solve this differently * lets hope this at least works */ if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0 && s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0) s->workaround_bugs|= FF_BUG_NO_PADDING; if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok s->workaround_bugs|= FF_BUG_NO_PADDING; #endif } if(s->workaround_bugs& FF_BUG_STD_QPEL){ SET_QPEL_FUNC(qpel_pixels_tab[0][ 5], qpel16_mc11_old_c) SET_QPEL_FUNC(qpel_pixels_tab[0][ 7], qpel16_mc31_old_c) SET_QPEL_FUNC(qpel_pixels_tab[0][ 9], qpel16_mc12_old_c) SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c) SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c) SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c) SET_QPEL_FUNC(qpel_pixels_tab[1][ 5], qpel8_mc11_old_c) SET_QPEL_FUNC(qpel_pixels_tab[1][ 7], qpel8_mc31_old_c) SET_QPEL_FUNC(qpel_pixels_tab[1][ 9], qpel8_mc12_old_c) SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c) SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c) SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c) } if(avctx->debug & FF_DEBUG_BUGS) av_log(s->avctx, AV_LOG_DEBUG, "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n", s->workaround_bugs, s->lavc_build, s->xvid_build, s->divx_version, s->divx_build, s->divx_packed ? "p" : ""); #if 0 // dump bits per frame / qp / complexity { static FILE *f=NULL; if(!f) f=fopen("rate_qp_cplx.txt", "w"); fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale); } #endif /* After H263 & mpeg4 header decode we have the height, width,*/ /* and other parameters. So then we could init the picture */ /* FIXME: By the way H263 decoder is evolving it should have */ /* an H263EncContext */ if ( s->width != avctx->width || s->height != avctx->height) { /* H.263 could change picture size any time */ ParseContext pc= s->parse_context; //FIXME move these demuxng hack to avformat s->parse_context.buffer=0; MPV_common_end(s); s->parse_context= pc; } if (!s->context_initialized) { avctx->width = s->width; avctx->height = s->height; goto retry; } if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P)) s->gob_index = ff_h263_get_gob_height(s); // for hurry_up==5 s->current_picture.pict_type= s->pict_type; s->current_picture.key_frame= s->pict_type == I_TYPE; /* skip b frames if we dont have reference frames */ if(s->last_picture_ptr==NULL && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size); /* skip b frames if we are in a hurry */ if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size); /* skip everything if we are in a hurry>=5 */ if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size); if(s->next_p_frame_damaged){ if(s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size); else s->next_p_frame_damaged=0; } if(MPV_frame_start(s, avctx) < 0) return -1; #ifdef DEBUG printf("qscale=%d\n", s->qscale); #endif ff_er_frame_start(s); //the second part of the wmv2 header contains the MB skip bits which are stored in current_picture->mb_type //which isnt available before MPV_frame_start() if (s->msmpeg4_version==5){ if(ff_wmv2_decode_secondary_picture_header(s) < 0) return -1; } /* decode each macroblock */ s->mb_x=0; s->mb_y=0; decode_slice(s); while(s->mb_y<s->mb_height){ if(s->msmpeg4_version){ if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0 || get_bits_count(&s->gb) > s->gb.size_in_bits) break; }else{ if(ff_h263_resync(s)<0) break; } if(s->msmpeg4_version<4 && s->h263_pred) ff_mpeg4_clean_buffers(s); decode_slice(s); } if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE) if(msmpeg4_decode_ext_header(s, buf_size) < 0){ s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR; } /* divx 5.01+ bistream reorder stuff */ if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_packed){ int current_pos= get_bits_count(&s->gb)>>3; int startcode_found=0; if( buf_size - current_pos > 5 && buf_size - current_pos < BITSTREAM_BUFFER_SIZE){ int i; for(i=current_pos; i<buf_size-3; i++){ if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){ startcode_found=1; break; } } } if(s->gb.buffer == s->bitstream_buffer && buf_size>20){ //xvid style startcode_found=1; current_pos=0; } if(startcode_found){ memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos); s->bitstream_buffer_size= buf_size - current_pos; } } ff_er_frame_end(s); MPV_frame_end(s); assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type); assert(s->current_picture.pict_type == s->pict_type); if(s->pict_type==B_TYPE || s->low_delay){ *pict= *(AVFrame*)&s->current_picture; ff_print_debug_info(s, pict); } else { *pict= *(AVFrame*)&s->last_picture; if(pict) ff_print_debug_info(s, pict); } /* Return the Picture timestamp as the frame number */ /* we substract 1 because it is added on utils.c */ avctx->frame_number = s->picture_number - 1; /* dont output the last pic after seeking */ if(s->last_picture_ptr || s->low_delay) *data_size = sizeof(AVFrame); #ifdef PRINT_FRAME_TIME printf("%Ld\n", rdtsc()-time); #endif return get_consumed_bytes(s, buf_size); }