From 88484399c5d06ad27353cba706bf3cafef67729c Mon Sep 17 00:00:00 2001
From: Mathieu Duponchelle <mathieu.duponchelle@opencreed.com>
Date: Thu, 4 Jun 2015 17:59:17 +0200
Subject: [PATCH] audioconvert: copy metadata that only has the "audio" tag.

https://bugzilla.gnome.org/show_bug.cgi?id=750406
---
 gst/audioconvert/gstaudioconvert.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/gst/audioconvert/gstaudioconvert.c b/gst/audioconvert/gstaudioconvert.c
index 09a6860446..21fae6e9f3 100644
--- a/gst/audioconvert/gstaudioconvert.c
+++ b/gst/audioconvert/gstaudioconvert.c
@@ -86,6 +86,8 @@ static gboolean gst_audio_convert_set_caps (GstBaseTransform * base,
     GstCaps * incaps, GstCaps * outcaps);
 static GstFlowReturn gst_audio_convert_transform (GstBaseTransform * base,
     GstBuffer * inbuf, GstBuffer * outbuf);
+static gboolean gst_audio_convert_transform_meta (GstBaseTransform * trans,
+    GstBuffer * outbuf, GstMeta * meta, GstBuffer * inbuf);
 static void gst_audio_convert_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);
 static void gst_audio_convert_get_property (GObject * object, guint prop_id,
@@ -216,6 +218,8 @@ gst_audio_convert_class_init (GstAudioConvertClass * klass)
       GST_DEBUG_FUNCPTR (gst_audio_convert_set_caps);
   basetransform_class->transform =
       GST_DEBUG_FUNCPTR (gst_audio_convert_transform);
+  basetransform_class->transform_meta =
+      GST_DEBUG_FUNCPTR (gst_audio_convert_transform_meta);
 
   basetransform_class->passthrough_on_same_caps = TRUE;
 }
@@ -863,6 +867,23 @@ convert_error:
   }
 }
 
+static gboolean
+gst_audio_convert_transform_meta (GstBaseTransform * trans, GstBuffer * outbuf,
+    GstMeta * meta, GstBuffer * inbuf)
+{
+  const GstMetaInfo *info = meta->info;
+  const gchar *const *tags;
+
+  tags = gst_meta_api_type_get_tags (info->api);
+
+  if (tags && g_strv_length ((gchar **) tags) == 1
+      && gst_meta_api_type_has_tag (info->api,
+          g_quark_from_string (GST_META_TAG_AUDIO_STR)))
+    return TRUE;
+
+  return FALSE;
+}
+
 static void
 gst_audio_convert_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)