glmixer: advertise support for changing input caps mid-stream

https://bugzilla.gnome.org/show_bug.cgi?id=739334

diff --git a/ext/gl/gstglmixer.c b/ext/gl/gstglmixer.c
index f95a955..9b1dcb5 100644 (file)
--- a/ext/gl/gstglmixer.c
+++ b/ext/gl/gstglmixer.c
@@ -288,6 +288,98 @@ gst_gl_mixer_pad_sink_acceptcaps (GstPad * pad, GstGLMixer * mix,
 }
 
 static GstCaps *
+gst_gl_mixer_set_caps_features (const GstCaps * caps,
+    const gchar * feature_name)
+{
+  GstCaps *tmp = gst_caps_copy (caps);
+  guint n = gst_caps_get_size (tmp);
+  guint i = 0;
+
+  for (i = 0; i < n; i++) {
+    GstCapsFeatures *features = gst_caps_get_features (tmp, i);
+    if (features) {
+      guint n_f = gst_caps_features_get_size (features);
+      guint j = 0;
+      for (j = 0; j < n_f; j++) {
+        gst_caps_features_remove_id (features,
+            gst_caps_features_get_nth_id (features, j));
+      }
+    }
+
+    gst_caps_features_add (features, feature_name);
+    gst_caps_set_simple (tmp, "format", G_TYPE_STRING, "RGBA", NULL);
+  }
+
+  return tmp;
+}
+
+/* copies the given caps */
+static GstCaps *
+gst_gl_mixer_caps_remove_format_info (GstCaps * caps)
+{
+  GstStructure *st;
+  GstCapsFeatures *f;
+  gint i, n;
+  GstCaps *res;
+
+  res = gst_caps_new_empty ();
+
+  n = gst_caps_get_size (caps);
+  for (i = 0; i < n; i++) {
+    st = gst_caps_get_structure (caps, i);
+    f = gst_caps_get_features (caps, i);
+
+    /* If this is already expressed by the existing caps
+     * skip this structure */
+    if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))
+      continue;
+
+    st = gst_structure_copy (st);
+    /* Only remove format info for the cases when we can actually convert */
+    if (!gst_caps_features_is_any (f)
+        && gst_caps_features_is_equal (f,
+            GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))
+      gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",
+          "width", "height", NULL);
+
+    gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));
+  }
+
+  return res;
+}
+
+GstCaps *
+gst_gl_mixer_update_caps (GstGLMixer * mix, GstCaps * caps)
+{
+  GstCaps *result = NULL;
+  GstCaps *glcaps = gst_gl_mixer_set_caps_features (caps,
+      GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
+#if GST_GL_HAVE_PLATFORM_EGL
+  GstCaps *eglcaps = gst_gl_mixer_set_caps_features (caps,
+      GST_CAPS_FEATURE_MEMORY_EGL_IMAGE);
+#endif
+  GstCaps *uploadcaps = gst_gl_mixer_set_caps_features (caps,
+      GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META);
+  GstCaps *raw_caps =
+      gst_caps_from_string (GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS));
+
+  result = gst_caps_new_empty ();
+
+  result = gst_caps_merge (result, glcaps);
+#if GST_GL_HAVE_PLATFORM_EGL
+  result = gst_caps_merge (result, eglcaps);
+#endif
+  result = gst_caps_merge (result, uploadcaps);
+  result = gst_caps_merge (result, raw_caps);
+
+  result = gst_caps_merge (result, gst_gl_mixer_caps_remove_format_info (caps));
+
+  GST_DEBUG_OBJECT (mix, "returning %" GST_PTR_FORMAT, result);
+
+  return result;
+}
+
+static GstCaps *
 gst_gl_mixer_pad_sink_getcaps (GstPad * pad, GstGLMixer * mix, GstCaps * filter)
 {
   GstCaps *srccaps;
@@ -302,6 +394,8 @@ gst_gl_mixer_pad_sink_getcaps (GstPad * pad, GstGLMixer * mix, GstCaps * filter)
   if (srccaps == NULL) {
     had_current_caps = FALSE;
     srccaps = template_caps;
+  } else {
+    srccaps = gst_caps_merge (srccaps, gst_gl_mixer_update_caps (mix, srccaps));
   }
 
   filtered_caps = srccaps;
@@ -309,12 +403,13 @@ gst_gl_mixer_pad_sink_getcaps (GstPad * pad, GstGLMixer * mix, GstCaps * filter)
     filtered_caps = gst_caps_intersect (srccaps, filter);
   returned_caps = gst_caps_intersect (filtered_caps, template_caps);
 
-  gst_caps_unref (srccaps);
   if (filter)
     gst_caps_unref (filtered_caps);
   if (had_current_caps)
     gst_caps_unref (template_caps);
 
+  GST_DEBUG_OBJECT (pad, "returning %" GST_PTR_FORMAT, returned_caps);
+
   return returned_caps;
 }
 
@@ -590,98 +685,6 @@ gst_gl_mixer_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
   return result;
 }
 
-static GstCaps *
-gst_gl_mixer_set_caps_features (const GstCaps * caps,
-    const gchar * feature_name)
-{
-  GstCaps *tmp = gst_caps_copy (caps);
-  guint n = gst_caps_get_size (tmp);
-  guint i = 0;
-
-  for (i = 0; i < n; i++) {
-    GstCapsFeatures *features = gst_caps_get_features (tmp, i);
-    if (features) {
-      guint n_f = gst_caps_features_get_size (features);
-      guint j = 0;
-      for (j = 0; j < n_f; j++) {
-        gst_caps_features_remove_id (features,
-            gst_caps_features_get_nth_id (features, j));
-      }
-    }
-
-    gst_caps_features_add (features, feature_name);
-    gst_caps_set_simple (tmp, "format", G_TYPE_STRING, "RGBA", NULL);
-  }
-
-  return tmp;
-}
-
-/* copies the given caps */
-static GstCaps *
-gst_gl_mixer_caps_remove_format_info (GstCaps * caps)
-{
-  GstStructure *st;
-  GstCapsFeatures *f;
-  gint i, n;
-  GstCaps *res;
-
-  res = gst_caps_new_empty ();
-
-  n = gst_caps_get_size (caps);
-  for (i = 0; i < n; i++) {
-    st = gst_caps_get_structure (caps, i);
-    f = gst_caps_get_features (caps, i);
-
-    /* If this is already expressed by the existing caps
-     * skip this structure */
-    if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))
-      continue;
-
-    st = gst_structure_copy (st);
-    /* Only remove format info for the cases when we can actually convert */
-    if (!gst_caps_features_is_any (f)
-        && gst_caps_features_is_equal (f,
-            GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))
-      gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",
-          "width", "height", NULL);
-
-    gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));
-  }
-
-  return res;
-}
-
-GstCaps *
-gst_gl_mixer_update_caps (GstGLMixer * mix, GstCaps * caps)
-{
-  GstCaps *result = NULL;
-  GstCaps *glcaps = gst_gl_mixer_set_caps_features (caps,
-      GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
-#if GST_GL_HAVE_PLATFORM_EGL
-  GstCaps *eglcaps = gst_gl_mixer_set_caps_features (caps,
-      GST_CAPS_FEATURE_MEMORY_EGL_IMAGE);
-#endif
-  GstCaps *uploadcaps = gst_gl_mixer_set_caps_features (caps,
-      GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META);
-  GstCaps *raw_caps =
-      gst_caps_from_string (GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS));
-
-  result = gst_caps_new_empty ();
-
-  result = gst_caps_merge (result, glcaps);
-#if GST_GL_HAVE_PLATFORM_EGL
-  result = gst_caps_merge (result, eglcaps);
-#endif
-  result = gst_caps_merge (result, uploadcaps);
-  result = gst_caps_merge (result, raw_caps);
-
-  result = gst_caps_merge (result, gst_gl_mixer_caps_remove_format_info (caps));
-
-  GST_DEBUG_OBJECT (mix, "returning %" GST_PTR_FORMAT, result);
-
-  return result;
-}
-
 static gboolean
 gst_gl_mixer_query_caps (GstPad * pad, GstAggregator * agg, GstQuery * query)
 {