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avformat: Factorize codec probing.

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This commit is contained in:
Alex Converse
2012-06-04 16:07:48 -07:00
parent c6061443f7
commit 62bebf6edb
1 changed files with 25 additions and 20 deletions
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45
libavformat/utils.c
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@@ -612,6 +612,30 @@ fail:
/*******************************************************/ /*******************************************************/
static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
{
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 do not 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);
}
}
}
}
int ff_read_packet(AVFormatContext *s, AVPacket *pkt) int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
{ {
int ret, i; int ret, i;
@@ -675,26 +699,7 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
s->raw_packet_buffer_remaining_size -= pkt->size; s->raw_packet_buffer_remaining_size -= pkt->size;
if(st->codec->codec_id == CODEC_ID_PROBE){ probe_codec(s, st, pkt);
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 do not 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);
}
}
}
} }
} }