int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx) { int i; Picture *pic; s->mb_skipped = 0; assert(s->last_picture_ptr==NULL || s->out_format != FMT_H264 || s->codec_id == CODEC_ID_SVQ3); /* mark&release old frames */ if (s->pict_type != FF_B_TYPE && s->last_picture_ptr && s->last_picture_ptr != s->next_picture_ptr && s->last_picture_ptr->data[0]) { if(s->out_format != FMT_H264 || s->codec_id == CODEC_ID_SVQ3){ free_frame_buffer(s, s->last_picture_ptr); /* release forgotten pictures */ /* if(mpeg124/h263) */ if(!s->encoding){ for(i=0; i<MAX_PICTURE_COUNT; i++){ if(s->picture[i].data[0] && &s->picture[i] != s->next_picture_ptr && s->picture[i].reference){ av_log(avctx, AV_LOG_ERROR, "releasing zombie picture\n"); free_frame_buffer(s, &s->picture[i]); } } } } } alloc: if(!s->encoding){ /* release non reference frames */ for(i=0; i<MAX_PICTURE_COUNT; i++){ if(s->picture[i].data[0] && !s->picture[i].reference /*&& s->picture[i].type!=FF_BUFFER_TYPE_SHARED*/){ free_frame_buffer(s, &s->picture[i]); } } if(s->current_picture_ptr && s->current_picture_ptr->data[0]==NULL) pic= s->current_picture_ptr; //we already have a unused image (maybe it was set before reading the header) else{ i= ff_find_unused_picture(s, 0); pic= &s->picture[i]; } pic->reference= 0; if (!s->dropable){ if (s->codec_id == CODEC_ID_H264) pic->reference = s->picture_structure; else if (s->pict_type != FF_B_TYPE) pic->reference = 3; } pic->coded_picture_number= s->coded_picture_number++; if(ff_alloc_picture(s, pic, 0) < 0) return -1; s->current_picture_ptr= pic; s->current_picture_ptr->top_field_first= s->top_field_first; //FIXME use only the vars from current_pic s->current_picture_ptr->interlaced_frame= !s->progressive_frame && !s->progressive_sequence; } s->current_picture_ptr->pict_type= s->pict_type; // if(s->flags && CODEC_FLAG_QSCALE) // s->current_picture_ptr->quality= s->new_picture_ptr->quality; s->current_picture_ptr->key_frame= s->pict_type == FF_I_TYPE; ff_copy_picture(&s->current_picture, s->current_picture_ptr); if (s->pict_type != FF_B_TYPE) { s->last_picture_ptr= s->next_picture_ptr; if(!s->dropable) s->next_picture_ptr= s->current_picture_ptr; } /* av_log(s->avctx, AV_LOG_DEBUG, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n", s->last_picture_ptr, s->next_picture_ptr,s->current_picture_ptr, s->last_picture_ptr ? s->last_picture_ptr->data[0] : NULL, s->next_picture_ptr ? s->next_picture_ptr->data[0] : NULL, s->current_picture_ptr ? s->current_picture_ptr->data[0] : NULL, s->pict_type, s->dropable);*/ if(s->last_picture_ptr) ff_copy_picture(&s->last_picture, s->last_picture_ptr); if(s->next_picture_ptr) ff_copy_picture(&s->next_picture, s->next_picture_ptr); if(s->pict_type != FF_I_TYPE && (s->last_picture_ptr==NULL || s->last_picture_ptr->data[0]==NULL) && !s->dropable && s->codec_id != CODEC_ID_H264){ av_log(avctx, AV_LOG_ERROR, "warning: first frame is no keyframe\n"); assert(s->pict_type != FF_B_TYPE); //these should have been dropped if we don't have a reference goto alloc; } assert(s->pict_type == FF_I_TYPE || (s->last_picture_ptr && s->last_picture_ptr->data[0])); if(s->picture_structure!=PICT_FRAME && s->out_format != FMT_H264){ int i; for(i=0; i<4; i++){ if(s->picture_structure == PICT_BOTTOM_FIELD){ s->current_picture.data[i] += s->current_picture.linesize[i]; } s->current_picture.linesize[i] *= 2; s->last_picture.linesize[i] *=2; s->next_picture.linesize[i] *=2; } } s->hurry_up= s->avctx->hurry_up; s->error_recognition= avctx->error_recognition; /* set dequantizer, we can't do it during init as it might change for mpeg4 and we can't do it in the header decode as init is not called for mpeg4 there yet */ if(s->mpeg_quant || s->codec_id == CODEC_ID_MPEG2VIDEO){ s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra; s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter; }else if(s->out_format == FMT_H263 || s->out_format == FMT_H261){ s->dct_unquantize_intra = s->dct_unquantize_h263_intra; s->dct_unquantize_inter = s->dct_unquantize_h263_inter; }else{ s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra; s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter; } if(s->dct_error_sum){ assert(s->avctx->noise_reduction && s->encoding); update_noise_reduction(s); } if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) return ff_xvmc_field_start(s, avctx); return 0; }