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Code Issues Releases Activity

New codec probing system try #1.

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Originally committed as revision 14184 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-07-12 18:42:00 +00:00
parent 3e86dba24b
commit 0bef08e516
4 changed files with 46 additions and 2 deletions
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2
libavcodec/avcodec.h
View File

@ -313,6 +313,8 @@ enum CodecID {
/* other specific kind of codecs (generally used for attachments) */
CODEC_ID_TTF= 0x18000,
CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
* stream (only used by libavformat) */
};

2
libavformat/asf.c
View File

@ -264,7 +264,7 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
if (is_dvr_ms_audio) {
// codec_id and codec_tag are unreliable in dvr_ms
// files. Set them later by probing stream.
st->codec->codec_id = CODEC_ID_NONE;
st->codec->codec_id = CODEC_ID_PROBE;
st->codec->codec_tag = 0;
}
st->need_parsing = AVSTREAM_PARSE_FULL;

10
libavformat/avformat.h
View File

@ -391,6 +391,8 @@ typedef struct AVStream {
char *filename; /**< source filename of the stream */
int disposition; /**< AV_DISPOSITION_* bitfield */
AVProbeData probe_data;
} AVStream;
#define AV_PROGRAM_RUNNING 1
@ -555,6 +557,14 @@ typedef struct AVFormatContext {
*/
int debug;
#define FF_FDEBUG_TS 0x0001
/**
* raw packets from the demuxer, prior to parsing and decoding.
* This buffer is used for buffering packets until the codec can
* be identified, as parsing cannot be done without knowing the
* codec.
*/
struct AVPacketList *raw_packet_buffer;
} AVFormatContext;
typedef struct AVPacketList {

34
libavformat/utils.c
View File

@ -540,12 +540,30 @@ int av_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret;
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->raw_packet_buffer = pktl->next;
av_free(pktl);
return 0;
}
}
av_init_packet(pkt);
ret= s->iformat->read_packet(s, pkt);
if (ret < 0)
return ret;
st= s->streams[pkt->stream_index];
if(!pktl && st->codec->codec_id!=CODEC_ID_PROBE)
return ret;
add_to_pktbuf(&s->raw_packet_buffer, pkt);
switch(st->codec->codec_type){
case CODEC_TYPE_VIDEO:
if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
@ -558,7 +576,21 @@ int av_read_packet(AVFormatContext *s, AVPacket *pkt)
break;
}
return ret;
if(st->codec->codec_id == CODEC_ID_PROBE){
AVProbeData *pd = &st->probe_data;
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);
set_codec_from_probe_data(st, pd, 1);
if(st->codec->codec_id != CODEC_ID_PROBE){
pd->buf_size=0;
av_freep(&pd->buf);
}
}
}
}
/**********************************************************/