static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size) { Mpeg1Context *s = avctx->priv_data; AVFrame *picture = data; MpegEncContext *s2 = &s->mpeg_enc_ctx; dprintf(avctx, "fill_buffer\n"); if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) { /* special case for last picture */ if (s2->low_delay==0 && s2->next_picture_ptr) { *picture= *(AVFrame*)s2->next_picture_ptr; s2->next_picture_ptr= NULL; *data_size = sizeof(AVFrame); } return buf_size; } if(s2->flags&CODEC_FLAG_TRUNCATED){ int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size); if( ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 ) return buf_size; } #if 0 if (s->repeat_field % 2 == 1) { s->repeat_field++; //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number, // s2->picture_number, s->repeat_field); if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) { *data_size = sizeof(AVPicture); goto the_end; } } #endif if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == AV_RL32("VCR2")) vcr2_init_sequence(avctx); s->slice_count= 0; if(avctx->extradata && !avctx->frame_number) decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size); return decode_chunks(avctx, picture, data_size, buf, buf_size); }