glfilterapp: actually emit the client-draw signal

diff --git a/ext/gl/gstglfilterapp.c b/ext/gl/gstglfilterapp.c
index 89b8841..d7dbd88 100644 (file)
--- a/ext/gl/gstglfilterapp.c
+++ b/ext/gl/gstglfilterapp.c
@@ -98,11 +98,14 @@ gst_gl_filter_app_class_init (GstGLFilterAppClass * klass)
    *
    * Will be emitted before to draw the texture.  The client should
    * redraw the surface/contents with the @texture, @width and @height.
+   *
+   * Returns: whether the texture was redrawn by the signal.  If not, a
+   *          default redraw will occur.
    */
   gst_gl_filter_app_signals[CLIENT_DRAW_SIGNAL] =
       g_signal_new ("client-draw", G_TYPE_FROM_CLASS (klass),
       G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
-      G_TYPE_NONE, 3, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
+      G_TYPE_BOOLEAN, 3, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
 
   gst_element_class_set_metadata (element_class,
       "OpenGL application filter", "Filter/Effect",
@@ -149,10 +152,13 @@ gst_gl_filter_app_set_caps (GstGLFilter * filter, GstCaps * incaps,
 static void
 _emit_draw_signal (guint tex, gint width, gint height, gpointer data)
 {
-  GstGLFilter *filter = data;
+  GstGLFilterApp *app_filter = GST_GL_FILTER_APP (data);
+  gboolean drawn;
+
+  g_signal_emit (app_filter, gst_gl_filter_app_signals[CLIENT_DRAW_SIGNAL], 0,
+      tex, width, height, &drawn);
 
-  g_signal_emit (filter, gst_gl_filter_app_signals[CLIENT_DRAW_SIGNAL], 0,
-      tex, width, height);
+  app_filter->default_draw = !drawn;
 }
 
 static gboolean
@@ -161,22 +167,19 @@ gst_gl_filter_app_filter_texture (GstGLFilter * filter, guint in_tex,
 {
   GstGLFilterApp *app_filter = GST_GL_FILTER_APP (filter);
 
-  if (app_filter->clientDrawCallback) {
-    //blocking call, use a FBO
-    gst_gl_context_use_fbo (filter->context,
-        GST_VIDEO_INFO_WIDTH (&filter->out_info),
-        GST_VIDEO_INFO_HEIGHT (&filter->out_info),
-        filter->fbo, filter->depthbuffer, out_tex, (GLCB) _emit_draw_signal,
-        GST_VIDEO_INFO_WIDTH (&filter->in_info),
-        GST_VIDEO_INFO_HEIGHT (&filter->in_info),
-        in_tex, 45,
-        (gfloat) GST_VIDEO_INFO_WIDTH (&filter->out_info) /
-        (gfloat) GST_VIDEO_INFO_HEIGHT (&filter->out_info),
-        0.1, 100, GST_GL_DISPLAY_PROJECTION_PERSPECTIVE, filter);
-  }
-  //default
-  else {
-    //blocking call, use a FBO
+  //blocking call, use a FBO
+  gst_gl_context_use_fbo (filter->context,
+      GST_VIDEO_INFO_WIDTH (&filter->out_info),
+      GST_VIDEO_INFO_HEIGHT (&filter->out_info),
+      filter->fbo, filter->depthbuffer, out_tex, (GLCB) _emit_draw_signal,
+      GST_VIDEO_INFO_WIDTH (&filter->in_info),
+      GST_VIDEO_INFO_HEIGHT (&filter->in_info),
+      in_tex, 45,
+      (gfloat) GST_VIDEO_INFO_WIDTH (&filter->out_info) /
+      (gfloat) GST_VIDEO_INFO_HEIGHT (&filter->out_info),
+      0.1, 100, GST_GL_DISPLAY_PROJECTION_PERSPECTIVE, filter);
+
+  if (app_filter->default_draw) {
     gst_gl_filter_render_to_target (filter, TRUE, in_tex, out_tex,
         gst_gl_filter_app_callback, filter);
   }

diff --git a/ext/gl/gstglfilterapp.h b/ext/gl/gstglfilterapp.h
index 2d423c5..a8978c5 100644 (file)
--- a/ext/gl/gstglfilterapp.h
+++ b/ext/gl/gstglfilterapp.h
@@ -38,8 +38,7 @@ struct _GstGLFilterApp
 {
     GstGLFilter filter;
 
-    GLCB clientDrawCallback;
-    gpointer client_data;
+    gboolean default_draw;
 };
 
 struct _GstGLFilterAppClass