codecs: vp9decoder: add support for render delay

[platform/upstream/gstreamer.git] / subprojects / gst-plugins-bad / gst-libs / gst / codecs / gstvp9decoder.h

diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gstvp9decoder.h b/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gstvp9decoder.h
index 4f5ccdb..76983f5 100644 (file)
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gstvp9decoder.h
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gstvp9decoder.h
@@ -171,6 +171,22 @@ struct _GstVp9DecoderClass
                                         GstVideoCodecFrame * frame,
                                         GstVp9Picture * picture);
 
+  /**
+   * GstVp9DecoderClass::get_preferred_output_delay:
+   * @decoder: a #GstVp9Decoder
+   * @is_live: whether upstream is live or not
+   *
+   * Optional. Retrieve the preferred output delay from child classes.
+   * controls how many frames to delay when calling
+   * GstVp9DecoderClass::output_picture
+   *
+   * Returns: the number of perferred delayed output frame
+   *
+   * Since: 1.20
+   */
+  guint           (*get_preferred_output_delay)   (GstVp9Decoder * decoder,
+                                                   gboolean is_live);
+
   /*< private >*/
   gpointer padding[GST_PADDING_LARGE];
 };