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basetransform: implement a default transform_meta.

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If a metadata has no dependency as shown by the tags, copy it.
This commit is contained in:
Mathieu Duponchelle 2013-08-22 00:01:44 +02:00 committed by Sebastian Dröge
parent 4c7dbde791
commit 8d24c4e451
2 changed files with 24 additions and 5 deletions
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3
gst/gstmeta.c
View file

@ -139,6 +139,9 @@ gst_meta_api_type_get_tags (GType api)
tags = g_type_get_qdata (api, g_quark_from_string ("tags"));
if (!tags[0])
return NULL;
return (const gchar * const *) tags;
}

26
libs/gst/base/gstbasetransform.c
View file

@ -356,6 +356,9 @@ static GstFlowReturn default_prepare_output_buffer (GstBaseTransform * trans,
GstBuffer * inbuf, GstBuffer ** outbuf);
static gboolean default_copy_metadata (GstBaseTransform * trans,
GstBuffer * inbuf, GstBuffer * outbuf);
static gboolean
gst_base_transform_default_transform_meta (GstBaseTransform * trans,
GstBuffer * inbuf, GstMeta * meta, GstBuffer * outbuf);
/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
@ -407,6 +410,8 @@ gst_base_transform_class_init (GstBaseTransformClass * klass)
GST_DEBUG_FUNCPTR (gst_base_transform_default_propose_allocation);
klass->transform_size =
GST_DEBUG_FUNCPTR (gst_base_transform_default_transform_size);
klass->transform_meta =
GST_DEBUG_FUNCPTR (gst_base_transform_default_transform_meta);
klass->sink_event = GST_DEBUG_FUNCPTR (gst_base_transform_sink_eventfunc);
klass->src_event = GST_DEBUG_FUNCPTR (gst_base_transform_src_eventfunc);
@ -544,6 +549,21 @@ gst_base_transform_transform_caps (GstBaseTransform * trans,
return ret;
}
static gboolean
gst_base_transform_default_transform_meta (GstBaseTransform * trans,
GstBuffer * inbuf, GstMeta * meta, GstBuffer * outbuf)
{
const GstMetaInfo *info = meta->info;
const gchar *const *tags;
tags = gst_meta_api_type_get_tags (info->api);
if (!tags)
return TRUE;
return FALSE;
}
static gboolean
gst_base_transform_default_transform_size (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, gsize size,
@ -1653,7 +1673,7 @@ foreach_metadata (GstBuffer * inbuf, GstMeta ** meta, gpointer user_data)
GstBaseTransformClass *klass;
const GstMetaInfo *info = (*meta)->info;
GstBuffer *outbuf = data->outbuf;
gboolean do_copy;
gboolean do_copy = FALSE;
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
@ -1671,10 +1691,6 @@ foreach_metadata (GstBuffer * inbuf, GstMeta ** meta, gpointer user_data)
do_copy = klass->transform_meta (trans, outbuf, *meta, inbuf);
GST_DEBUG_OBJECT (trans, "transformed metadata %s: copy: %d",
g_type_name (info->api), do_copy);
} else {
do_copy = FALSE;
GST_DEBUG_OBJECT (trans, "not copying metadata %s",
g_type_name (info->api));
}
/* we only copy metadata when the subclass implemented a transform_meta