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flvdec: Started to remove most of the "only 1-audio+1-video" assumptions

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This commit is contained in:
Joseph Wecker 2011-08-25 18:36:32 -07:00 committed by Michael Niedermayer
parent 30bcd6a945
commit c054f11606
2 changed files with 43 additions and 20 deletions
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6
libavformat/flv.h
View File

@ -62,6 +62,12 @@ enum {
FLV_TAG_TYPE_META = 0x12,
};
enum {
FLV_STREAM_TYPE_VIDEO,
FLV_STREAM_TYPE_AUDIO,
FLV_STREAM_TYPE_DATA,
};
enum {
FLV_MONO = 0,
FLV_STEREO = 1,

57
libavformat/flvdec.c
View File

@ -312,11 +312,17 @@ static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
return 0;
}
static AVStream *create_stream(AVFormatContext *s, int is_audio){
AVStream *st = av_new_stream(s, is_audio);
static AVStream *create_stream(AVFormatContext *s, int stream_type){
AVStream *st = av_new_stream(s, stream_type);
if (!st)
return NULL;
st->codec->codec_type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
switch(stream_type) {
case FLV_STREAM_TYPE_VIDEO: st->codec->codec_type = AVMEDIA_TYPE_VIDEO; break;
case FLV_STREAM_TYPE_AUDIO: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; break;
case FLV_STREAM_TYPE_DATA:
st->codec->codec_type = AVMEDIA_TYPE_DATA;
st->codec->codec_id = CODEC_ID_NONE; // Going to rely on copy for now
}
av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
return st;
}
@ -340,13 +346,15 @@ static int flv_read_header(AVFormatContext *s,
s->ctx_flags |= AVFMTCTX_NOHEADER;
if(flags & FLV_HEADER_FLAG_HASVIDEO){
if(!create_stream(s, 0))
if(!create_stream(s, FLV_STREAM_TYPE_VIDEO))
return AVERROR(ENOMEM);
}
if(flags & FLV_HEADER_FLAG_HASAUDIO){
if(!create_stream(s, 1))
if(!create_stream(s, FLV_STREAM_TYPE_AUDIO))
return AVERROR(ENOMEM);
}
// Flag doesn't indicate whether or not there is script-data present. Must
// create that stream if it's encountered.
offset = avio_rb32(s->pb);
avio_seek(s->pb, offset, SEEK_SET);
@ -371,7 +379,7 @@ static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
FLVContext *flv = s->priv_data;
int ret, i, type, size, flags, is_audio;
int ret, i, type, size, flags, stream_type;
int64_t next, pos;
int64_t dts, pts = AV_NOPTS_VALUE;
AVStream *st = NULL;
@ -394,20 +402,29 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
next= size + avio_tell(s->pb);
if (type == FLV_TAG_TYPE_AUDIO) {
is_audio=1;
stream_type=FLV_STREAM_TYPE_AUDIO;
flags = avio_r8(s->pb);
size--;
} else if (type == FLV_TAG_TYPE_VIDEO) {
is_audio=0;
stream_type=FLV_STREAM_TYPE_VIDEO;
flags = avio_r8(s->pb);
size--;
if ((flags & 0xf0) == 0x50) /* video info / command frame */
goto skip;
} else {
if (type == FLV_TAG_TYPE_META && size > 13+1+4)
} else if (type == FLV_TAG_TYPE_META) {
if (size > 13+1+4 && dts == 0) {
// Header-type metadata stuff
flv_read_metabody(s, next);
else /* skip packet */
av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
} else if (dts != 0) {
// Script-data
stream_type=FLV_STREAM_TYPE_VIDEO;
goto skip;
// TODO: Parse / set stuff, etc.
} else {
goto skip;
}
} else {
skip:
avio_seek(s->pb, next, SEEK_SET);
continue;
@ -420,17 +437,17 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
/* now find stream */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
if (st->id == is_audio)
if (st->id == stream_type)
break;
}
if(i == s->nb_streams){
av_log(s, AV_LOG_ERROR, "invalid stream\n");
st= create_stream(s, is_audio);
st= create_stream(s, stream_type);
s->ctx_flags &= ~AVFMTCTX_NOHEADER;
}
av_dlog(s, "%d %X %d \n", is_audio, flags, st->discard);
if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio))
||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
av_dlog(s, "%d %X %d \n", stream_type, flags, st->discard);
if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
|| st->discard >= AVDISCARD_ALL
){
avio_seek(s->pb, next, SEEK_SET);
@ -457,7 +474,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
avio_seek(s->pb, pos, SEEK_SET);
}
if(is_audio){
if(stream_type == FLV_STREAM_TYPE_AUDIO){
if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
st->codec->channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
st->codec->sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
@ -466,7 +483,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
if(!st->codec->codec_id){
flv_set_audio_codec(s, st, flags & FLV_AUDIO_CODECID_MASK);
}
}else{
} else if(stream_type == FLV_STREAM_TYPE_VIDEO) {
size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
}
@ -523,7 +540,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
pkt->stream_index = st->index;
if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
if ((stream_type == FLV_STREAM_TYPE_AUDIO) || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
pkt->flags |= AV_PKT_FLAG_KEY;
leave: