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don't parse whole swf file in header, can now play ffserver swf streams

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Originally committed as revision 8176 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2007-03-01 19:02:21 +00:00
parent 024c7378c3
commit 3922c59fc4
1 changed files with 6 additions and 9 deletions
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15
libavformat/swf.c
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@ -742,7 +742,7 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
SWFContext *swf = s->priv_data;
ByteIOContext *pb = &s->pb;
int nbits, len, frame_rate, tag, v;
offset_t firstTagOff;
offset_t frame_offset = -1;
AVStream *ast = 0;
AVStream *vst = 0;
@ -769,14 +769,12 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
swf->ms_per_frame = ( 1000 * 256 ) / frame_rate;
swf->samples_per_frame = 0;
firstTagOff = url_ftell(pb);
for(;;) {
offset_t tag_offset = url_ftell(pb);
tag = get_swf_tag(pb, &len);
if (tag < 0) {
if ( ast || vst )
break;
av_log(s, AV_LOG_ERROR, "No media found in SWF\n");
return AVERROR_IO;
if (tag < 0 || tag == TAG_VIDEOFRAME || tag == TAG_STREAMBLOCK) {
url_fseek(pb, frame_offset == -1 ? tag_offset : frame_offset, SEEK_SET);
break;
}
if ( tag == TAG_VIDEOSTREAM && !vst) {
int ch_id = get_le16(pb);
@ -814,6 +812,7 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
vst->codec->codec_type = CODEC_TYPE_VIDEO;
vst->codec->codec_id = CODEC_ID_MJPEG;
url_fskip(pb, len);
frame_offset = tag_offset;
} else {
url_fskip(pb, len);
}
@ -825,8 +824,6 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
vst->codec->time_base.num = 1;
}
}
url_fseek(pb, firstTagOff, SEEK_SET);
return 0;
}