audioencoder: add src and sink query methods

Allows subclasses to do their own handling of GstQuery and still
chain up to the parent class to handle the ones that they don't want
to handle

gst-libs/gst/audio/gstaudioencoder.c

@@ -347,6 +347,11 @@ static gboolean gst_audio_encoder_negotiate_unlocked (GstAudioEncoder * enc);
 static gboolean gst_audio_encoder_transform_meta_default (GstAudioEncoder *
     encoder, GstBuffer * outbuf, GstMeta * meta, GstBuffer * inbuf);
 
+static gboolean gst_audio_encoder_sink_query_default (GstAudioEncoder * encoder,
+    GstQuery * query);
+static gboolean gst_audio_encoder_src_query_default (GstAudioEncoder * encoder,
+    GstQuery * query);
+
 static void
 gst_audio_encoder_class_init (GstAudioEncoderClass * klass)
 {
@@ -392,6 +397,8 @@ gst_audio_encoder_class_init (GstAudioEncoderClass * klass)
   klass->getcaps = gst_audio_encoder_getcaps_default;
   klass->sink_event = gst_audio_encoder_sink_event_default;
   klass->src_event = gst_audio_encoder_src_event_default;
+  klass->sink_query = gst_audio_encoder_sink_query_default;
+  klass->src_query = gst_audio_encoder_src_query_default;
   klass->propose_allocation = gst_audio_encoder_propose_allocation_default;
   klass->decide_allocation = gst_audio_encoder_decide_allocation_default;
   klass->negotiate = gst_audio_encoder_negotiate_default;
@@ -1630,13 +1637,10 @@ gst_audio_encoder_sink_event (GstPad * pad, GstObject * parent,
 }
 
 static gboolean
-gst_audio_encoder_sink_query (GstPad * pad, GstObject * parent,
+gst_audio_encoder_sink_query_default (GstAudioEncoder * enc, GstQuery * query)
-    GstQuery * query)
 {
+  GstPad *pad = GST_AUDIO_ENCODER_SINK_PAD (enc);
   gboolean res = FALSE;
-  GstAudioEncoder *enc;
-
-  enc = GST_AUDIO_ENCODER (parent);
 
   switch (GST_QUERY_TYPE (query)) {
     case GST_QUERY_FORMATS:
@@ -1684,7 +1688,7 @@ gst_audio_encoder_sink_query (GstPad * pad, GstObject * parent,
       break;
     }
     default:
-      res = gst_pad_query_default (pad, parent, query);
+      res = gst_pad_query_default (pad, GST_OBJECT (enc), query);
       break;
   }
 
@@ -1692,6 +1696,26 @@ error:
   return res;
 }
 
+static gboolean
+gst_audio_encoder_sink_query (GstPad * pad, GstObject * parent,
+    GstQuery * query)
+{
+  GstAudioEncoder *encoder;
+  GstAudioEncoderClass *encoder_class;
+  gboolean ret = FALSE;
+
+  encoder = GST_AUDIO_ENCODER (parent);
+  encoder_class = GST_AUDIO_ENCODER_GET_CLASS (encoder);
+
+  GST_DEBUG_OBJECT (encoder, "received query %d, %s", GST_QUERY_TYPE (query),
+      GST_QUERY_TYPE_NAME (query));
+
+  if (encoder_class->sink_query)
+    ret = encoder_class->sink_query (encoder, query);
+
+  return ret;
+}
+
 static gboolean
 gst_audio_encoder_src_event_default (GstAudioEncoder * enc, GstEvent * event)
 {
@@ -1841,13 +1865,11 @@ exit:
  * segment stuff etc at all
  * Supposedly that's backward compatibility ... */
 static gboolean
-gst_audio_encoder_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
+gst_audio_encoder_src_query_default (GstAudioEncoder * enc, GstQuery * query)
 {
-  GstAudioEncoder *enc;
+  GstPad *pad = GST_AUDIO_ENCODER_SRC_PAD (enc);
   gboolean res = FALSE;
 
-  enc = GST_AUDIO_ENCODER (parent);
-
   GST_LOG_OBJECT (enc, "handling query: %" GST_PTR_FORMAT, query);
 
   switch (GST_QUERY_TYPE (query)) {
@@ -1939,13 +1961,33 @@ gst_audio_encoder_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
       break;
     }
     default:
-      res = gst_pad_query_default (pad, parent, query);
+      res = gst_pad_query_default (pad, GST_OBJECT (enc), query);
       break;
   }
 
   return res;
 }
 
+static gboolean
+gst_audio_encoder_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
+{
+  GstAudioEncoder *encoder;
+  GstAudioEncoderClass *encoder_class;
+  gboolean ret = FALSE;
+
+  encoder = GST_AUDIO_ENCODER (parent);
+  encoder_class = GST_AUDIO_ENCODER_GET_CLASS (encoder);
+
+  GST_DEBUG_OBJECT (encoder, "received query %d, %s", GST_QUERY_TYPE (query),
+      GST_QUERY_TYPE_NAME (query));
+
+  if (encoder_class->src_query)
+    ret = encoder_class->src_query (encoder, query);
+
+  return ret;
+}
+
+
 static void
 gst_audio_encoder_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)

gst-libs/gst/audio/gstaudioencoder.h

@@ -179,6 +179,16 @@ struct _GstAudioEncoder {
  *                  tags and meta with only the "audio" tag. subclasses can
  *                  implement this method and return %TRUE if the metadata is to be
  *                  copied. Since 1.6
+ * @sink_query:     Optional.
+ *                  Query handler on the sink pad. This function should
+ *                  return TRUE if the query could be performed. Subclasses
+ *                  should chain up to the parent implementation to invoke the
+ *                  default handler. Since 1.6
+ * @src_query:      Optional.
+ *                  Query handler on the source pad. This function should
+ *                  return TRUE if the query could be performed. Subclasses
+ *                  should chain up to the parent implementation to invoke the
+ *                  default handler. Since 1.6
  *
  * Subclasses can override any of the available virtual methods or not, as
  * needed. At minimum @set_format and @handle_frame needs to be overridden.
@@ -226,9 +236,15 @@ struct _GstAudioEncoderClass {
   gboolean      (*transform_meta)     (GstAudioEncoder *enc, GstBuffer *outbuf,
                                        GstMeta *meta, GstBuffer *inbuf);
 
+  gboolean      (*sink_query)         (GstAudioEncoder *encoder,
+				       GstQuery *query);
+
+  gboolean      (*src_query)          (GstAudioEncoder *encoder,
+				       GstQuery *query);
+
 
   /*< private >*/
-  gpointer       _gst_reserved[GST_PADDING_LARGE-1];
+  gpointer       _gst_reserved[GST_PADDING_LARGE-3];
 };
 
 GType           gst_audio_encoder_get_type         (void);