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wavparse: pass on tags from upstream if there are any

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Don't just ignore upstream tags from e.g. an ID3 tag before
the .wav data, pass them on downstream.

https://bugzilla.gnome.org/show_bug.cgi?id=729223
This commit is contained in:
Tim-Philipp Müller 2014-04-30 01:08:41 +01:00
parent eba3bba524
commit b1473491cf
1 changed files with 42 additions and 2 deletions
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44
gst/wavparse/gstwavparse.c
View file

@ -1775,10 +1775,33 @@ gst_wavparse_have_dts_caps (const GstCaps * caps, GstTypeFindProbability prob)
return gst_structure_has_field (s, "rate");
}
static GstTagList *
gst_wavparse_get_upstream_tags (GstWavParse * wav, GstTagScope scope)
{
GstTagList *tags = NULL;
GstEvent *ev;
gint i;
i = 0;
while ((ev = gst_pad_get_sticky_event (wav->sinkpad, GST_EVENT_TAG, i++))) {
gst_event_parse_tag (ev, &tags);
if (tags != NULL && gst_tag_list_get_scope (tags) == scope) {
tags = gst_tag_list_copy (tags);
gst_tag_list_remove_tag (tags, GST_TAG_CONTAINER_FORMAT);
gst_event_unref (ev);
break;
}
tags = NULL;
gst_event_unref (ev);
}
return tags;
}
static void
gst_wavparse_add_src_pad (GstWavParse * wav, GstBuffer * buf)
{
GstStructure *s;
GstTagList *tags, *utags;
GST_DEBUG_OBJECT (wav, "adding src pad");
@ -1816,10 +1839,27 @@ gst_wavparse_add_src_pad (GstWavParse * wav, GstBuffer * buf)
wav->start_segment = NULL;
}
if (wav->tags) {
gst_pad_push_event (wav->srcpad, gst_event_new_tag (wav->tags));
/* upstream tags, e.g. from id3/ape tag before the wav file; assume for now
* that there'll be only one scope/type of tag list from upstream, if any */
utags = gst_wavparse_get_upstream_tags (wav, GST_TAG_SCOPE_GLOBAL);
if (utags == NULL)
utags = gst_wavparse_get_upstream_tags (wav, GST_TAG_SCOPE_STREAM);
/* if there's a tag upstream it's probably been added to override the
* tags from inside the wav header, so keep upstream tags if in doubt */
tags = gst_tag_list_merge (utags, wav->tags, GST_TAG_MERGE_KEEP);
if (wav->tags != NULL) {
gst_tag_list_unref (wav->tags);
wav->tags = NULL;
}
if (utags != NULL)
gst_tag_list_unref (utags);
/* send tags downstream, if any */
if (tags != NULL)
gst_pad_push_event (wav->srcpad, gst_event_new_tag (tags));
}
static GstFlowReturn