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flvdemux: Skip unknown tags in push-mode

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We add a new mode (SKIP) in push-mode to skip tags that we don't known about

Partially fixes https://bugzilla.gnome.org/show_bug.cgi?id=670712
This commit is contained in:
Edward Hervey 2014-05-12 13:45:06 +02:00
parent f5b2b6e696
commit c09b14c931
2 changed files with 22 additions and 10 deletions
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31
gst/flv/gstflvdemux.c
View file

@ -1683,6 +1683,16 @@ gst_flv_demux_parse_tag_type (GstFlvDemux * demux, GstBuffer * buffer)
tag_type = map.data[0];
/* Tag size is 1 byte of type + 3 bytes of size + 7 bytes + tag data size +
* 4 bytes of previous tag size */
demux->tag_data_size = GST_READ_UINT24_BE (map.data + 1);
demux->tag_size = demux->tag_data_size + 11;
GST_LOG_OBJECT (demux, "tag data size is %" G_GUINT64_FORMAT,
demux->tag_data_size);
gst_buffer_unmap (buffer, &map);
switch (tag_type) {
case 9:
demux->state = FLV_STATE_TAG_VIDEO;
@ -1697,18 +1707,9 @@ gst_flv_demux_parse_tag_type (GstFlvDemux * demux, GstBuffer * buffer)
break;
default:
GST_WARNING_OBJECT (demux, "unsupported tag type %u", tag_type);
demux->state = FLV_STATE_SKIP;
}
/* Tag size is 1 byte of type + 3 bytes of size + 7 bytes + tag data size +
* 4 bytes of previous tag size */
demux->tag_data_size = GST_READ_UINT24_BE (map.data + 1);
demux->tag_size = demux->tag_data_size + 11;
GST_LOG_OBJECT (demux, "tag data size is %" G_GUINT64_FORMAT,
demux->tag_data_size);
gst_buffer_unmap (buffer, &map);
return ret;
}
@ -2111,6 +2112,16 @@ parse:
demux->state = FLV_STATE_TAG_TYPE;
goto beach;
}
case FLV_STATE_SKIP:
/* Skip unknown tags (set in _parse_tag_type()) */
if (gst_adapter_available (demux->adapter) >= demux->tag_size) {
gst_adapter_flush (demux->adapter, demux->tag_size);
demux->offset += demux->tag_size;
demux->state = FLV_STATE_TAG_TYPE;
goto parse;
} else {
goto beach;
}
default:
GST_DEBUG_OBJECT (demux, "unexpected demuxer state");
}

1
gst/flv/gstflvdemux.h
View file

@ -47,6 +47,7 @@ typedef enum
FLV_STATE_TAG_SCRIPT,
FLV_STATE_SEEK,
FLV_STATE_DONE,
FLV_STATE_SKIP,
FLV_STATE_NONE
} GstFlvDemuxState;