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add streams on the fly, swf is a streaming format and has no real header, correctly detect audio in RamboMJPEGAVP6_112K.swf now 

Originally committed as revision 9925 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2007-08-05 01:28:05 +00:00
parent c6377f6143
commit c6f05d8122
1 changed files with 28 additions and 37 deletions
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65
libavformat/swf.c
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@ -652,14 +652,21 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
get_le16(pb); /* frame count */
swf->samples_per_frame = 0;
s->ctx_flags |= AVFMTCTX_NOHEADER;
return 0;
}
static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
SWFContext *swf = s->priv_data;
ByteIOContext *pb = &s->pb;
AVStream *vst = NULL, *ast = NULL, *st = 0;
int tag, len, i, frame, v;
for(;;) {
offset_t tag_offset = url_ftell(pb);
tag = get_swf_tag(pb, &len);
if (tag < 0 || tag == TAG_VIDEOFRAME || tag == TAG_STREAMBLOCK) {
url_fseek(pb, frame_offset == -1 ? tag_offset : frame_offset, SEEK_SET);
break;
}
if (tag < 0)
return AVERROR(EIO);
if ( tag == TAG_VIDEOSTREAM && !vst) {
int ch_id = get_le16(pb);
get_le16(pb);
@ -670,6 +677,9 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
vst = av_new_stream(s, ch_id);
vst->codec->codec_type = CODEC_TYPE_VIDEO;
vst->codec->codec_id = codec_get_id(swf_codec_tags, get_byte(pb));
av_set_pts_info(vst, 64, 256, swf->frame_rate);
vst->codec->time_base = (AVRational){ 256, swf->frame_rate };
len -= 10;
} else if ( ( tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2 ) && !ast) {
/* streaming found */
int sample_rate_code;
@ -687,35 +697,8 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
return AVERROR(EIO);
ast->codec->sample_rate = 11025 << (sample_rate_code-1);
av_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
if (len > 4)
url_fskip(pb,len-4);
} else if (tag == TAG_JPEG2 && !vst) {
vst = av_new_stream(s, -2); /* -2 to avoid clash with video stream and audio stream */
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);
}
}
if (vst)
av_set_pts_info(vst, 64, 256, swf->frame_rate);
return 0;
}
static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
SWFContext *swf = s->priv_data;
ByteIOContext *pb = &s->pb;
AVStream *st = 0;
int tag, len, i, frame;
for(;;) {
tag = get_swf_tag(pb, &len);
if (tag < 0)
return AVERROR(EIO);
len -= 4;
} else
if (tag == TAG_VIDEOFRAME) {
int ch_id = get_le16(pb);
len -= 2;
@ -742,7 +725,17 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
} else if (tag == TAG_JPEG2) {
for (i=0; i<s->nb_streams; i++) {
st = s->streams[i];
if (st->id == -2) {
if (st->id == -2)
break;
}
if (i == s->nb_streams) {
vst = av_new_stream(s, -2); /* -2 to avoid clash with video stream and audio stream */
vst->codec->codec_type = CODEC_TYPE_VIDEO;
vst->codec->codec_id = CODEC_ID_MJPEG;
av_set_pts_info(vst, 64, 256, swf->frame_rate);
vst->codec->time_base = (AVRational){ 256, swf->frame_rate };
st = vst;
}
get_le16(pb); /* BITMAP_ID */
av_new_packet(pkt, len-2);
get_buffer(pb, pkt->data, 4);
@ -756,8 +749,6 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->stream_index = st->index;
return pkt->size;
}
}
}
url_fskip(pb, len);
}
return 0;