static int read_packet(AVFormatContext *s1, AVPacket *pkt) { VideoDemuxData *s = s1->priv_data; char filename_bytes[1024]; char *filename = filename_bytes; int i; int size[3]={0}, ret[3]={0}; AVIOContext *f[3] = {NULL}; AVCodecContext *codec= s1->streams[0]->codec; if (!s->is_pipe) { /* loop over input */ if (s->loop && s->img_number > s->img_last) { s->img_number = s->img_first; } if (s->img_number > s->img_last) return AVERROR_EOF; if (s->use_glob) { #if HAVE_GLOB filename = s->globstate.gl_pathv[s->img_number]; #endif } else { if (av_get_frame_filename(filename_bytes, sizeof(filename_bytes), s->path, s->img_number)<0 && s->img_number > 1) return AVERROR(EIO); } for(i=0; i<3; i++){ if (avio_open2(&f[i], filename, AVIO_FLAG_READ, &s1->interrupt_callback, NULL) < 0) { if(i>=1) break; av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename); return AVERROR(EIO); } size[i]= avio_size(f[i]); if(!s->split_planes) break; filename[ strlen(filename) - 1 ]= 'U' + i; } if(codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->width) infer_size(&codec->width, &codec->height, size[0]); } else { f[0] = s1->pb; if (url_feof(f[0])) return AVERROR(EIO); size[0]= 4096; } av_new_packet(pkt, size[0] + size[1] + size[2]); pkt->stream_index = 0; pkt->flags |= AV_PKT_FLAG_KEY; pkt->size= 0; for(i=0; i<3; i++){ if(f[i]){ ret[i]= avio_read(f[i], pkt->data + pkt->size, size[i]); if (!s->is_pipe) avio_close(f[i]); if(ret[i]>0) pkt->size += ret[i]; } } if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) { av_free_packet(pkt); return AVERROR(EIO); /* signal EOF */ } else { s->img_count++; s->img_number++; return 0; } }