libs: decoder: add _get_surface_formats()

This function exposes the available formats of the surfaces in the the current
context to the plugins.

2 files changed, 21 insertions, 0 deletions

diff --git a/gst-libs/gst/vaapi/gstvaapidecoder.c b/gst-libs/gst/vaapi/gstvaapidecoder.c
index 123b5a33..9a8cda2a 100644
--- a/gst-libs/gst/vaapi/gstvaapidecoder.c
+++ b/gst-libs/gst/vaapi/gstvaapidecoder.c
@@ -1067,3 +1067,21 @@ gst_vaapi_decoder_decode_codec_data (GstVaapiDecoder * decoder)
   gst_buffer_unmap (codec_data, &map_info);
   return status;
 }
+
+/**
+ * gst_vaapi_decoder_get_surface_formats:
+ * @decoder: a #GstVaapiDecoder
+ *
+ * Retrieves an array of #GstVideoFormat which the output surfaces of
+ * the @decoder can handle.
+ *
+ * Return value: (transfer full): a #GArray of #GstVideoFormat or
+ * %NULL
+ */
+GArray *
+gst_vaapi_decoder_get_surface_formats (GstVaapiDecoder * decoder)
+{
+  if (decoder && decoder->context)
+    return gst_vaapi_context_get_surface_formats (decoder->context);
+  return NULL;
+}
diff --git a/gst-libs/gst/vaapi/gstvaapidecoder.h b/gst-libs/gst/vaapi/gstvaapidecoder.h
index 77587d47..4b75f2d2 100644
--- a/gst-libs/gst/vaapi/gstvaapidecoder.h
+++ b/gst-libs/gst/vaapi/gstvaapidecoder.h
@@ -102,6 +102,9 @@ gst_vaapi_decoder_set_codec_state_changed_func (GstVaapiDecoder * decoder,
 GstCaps *
 gst_vaapi_decoder_get_caps (GstVaapiDecoder * decoder);
 
+GArray *
+gst_vaapi_decoder_get_surface_formats (GstVaapiDecoder * decoder);
+
 gboolean
 gst_vaapi_decoder_put_buffer (GstVaapiDecoder * decoder, GstBuffer * buf);