videodecoder: expose getcaps virtual function

Allows subclasses to do custom caps query replies.

Also exposes the standard caps query handler so subclasses can just
extend on top of it instead of reimplementing the caps query proxying.

https://bugzilla.gnome.org/show_bug.cgi?id=741263

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/check/libs/videodecoder.c b/tests/check/libs/videodecoder.c
index 960cbd17d..2197c7596 100644
--- a/tests/check/libs/videodecoder.c
+++ b/tests/check/libs/videodecoder.c
@@ -989,6 +989,42 @@ GST_START_TEST (videodecoder_query_caps_with_range_caps_peer)
 
 GST_END_TEST;
 
+#define GETCAPS_CAPS_STR "video/x-test-custom, somefield=(string)getcaps"
+static GstCaps *
+_custom_video_decoder_getcaps (GstVideoDecoder * dec, GstCaps * filter)
+{
+  return gst_caps_from_string (GETCAPS_CAPS_STR);
+}
+
+GST_START_TEST (videodecoder_query_caps_with_custom_getcaps)
+{
+  GstCaps *caps;
+  GstVideoDecoderClass *klass;
+  GstCaps *expected_caps;
+
+  setup_videodecodertester (&sinktemplate_restricted, NULL);
+
+  klass = GST_VIDEO_DECODER_CLASS (GST_VIDEO_DECODER_GET_CLASS (dec));
+  klass->getcaps = _custom_video_decoder_getcaps;
+
+  gst_pad_set_active (mysrcpad, TRUE);
+  gst_element_set_state (dec, GST_STATE_PLAYING);
+  gst_pad_set_active (mysinkpad, TRUE);
+
+  caps = gst_pad_peer_query_caps (mysrcpad, NULL);
+  fail_unless (caps != NULL);
+
+  expected_caps = gst_caps_from_string (GETCAPS_CAPS_STR);
+  fail_unless (gst_caps_is_equal (expected_caps, caps));
+  gst_caps_unref (expected_caps);
+  gst_caps_unref (caps);
+
+  cleanup_videodecodertest ();
+}
+
+GST_END_TEST;
+
+
 static Suite *
 gst_videodecoder_suite (void)
 {
@@ -999,6 +1035,7 @@ gst_videodecoder_suite (void)
 
   tcase_add_test (tc, videodecoder_query_caps_with_fixed_caps_peer);
   tcase_add_test (tc, videodecoder_query_caps_with_range_caps_peer);
+  tcase_add_test (tc, videodecoder_query_caps_with_custom_getcaps);
 
   tcase_add_test (tc, videodecoder_playback);
   tcase_add_test (tc, videodecoder_playback_with_events);