int av_read_packet(AVFormatContext *s, AVPacket *pkt) { int ret, i; AVStream *st; for(;;){ AVPacketList *pktl = s->raw_packet_buffer; if (pktl) { *pkt = pktl->pkt; if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE || !s->streams[pkt->stream_index]->probe_packets || s->raw_packet_buffer_remaining_size < pkt->size){ AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data; av_freep(&pd->buf); pd->buf_size = 0; s->raw_packet_buffer = pktl->next; s->raw_packet_buffer_remaining_size += pkt->size; av_free(pktl); return 0; av_init_packet(pkt); ret= s->iformat->read_packet(s, pkt); if (ret < 0) { if (!pktl || ret == AVERROR(EAGAIN)) return ret; for (i = 0; i < s->nb_streams; i++) s->streams[i]->probe_packets = 0; st= s->streams[pkt->stream_index]; switch(st->codec->codec_type){ case AVMEDIA_TYPE_VIDEO: if(s->video_codec_id) st->codec->codec_id= s->video_codec_id; break; case AVMEDIA_TYPE_AUDIO: if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id; break; case AVMEDIA_TYPE_SUBTITLE: if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id; break; if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE || !st->probe_packets)) return ret; add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); s->raw_packet_buffer_remaining_size -= pkt->size; if(st->codec->codec_id == CODEC_ID_PROBE){ AVProbeData *pd = &st->probe_data; av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index); --st->probe_packets; pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE); memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size); pd->buf_size += pkt->size; memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE); if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){ //FIXME we dont reduce score to 0 for the case of running out of buffer space in bytes set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0); if(st->codec->codec_id != CODEC_ID_PROBE){ pd->buf_size=0; av_freep(&pd->buf); av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);