static void ges_track_video_transition_duration_changed (GESTrackObject * object, guint64 duration) { GValue start_value = { 0, }; GValue end_value = { 0, }; GstElement *gnlobj = ges_track_object_get_gnlobject (object); GESTrackVideoTransition *self = GES_TRACK_VIDEO_TRANSITION (object); GESTrackVideoTransitionPrivate *priv = self->priv; GST_LOG ("updating controller"); if (G_UNLIKELY (!gnlobj || !priv->control_source)) return; GST_INFO ("duration: %" G_GUINT64_FORMAT, duration); g_value_init (&start_value, G_TYPE_DOUBLE); g_value_init (&end_value, G_TYPE_DOUBLE); g_value_set_double (&start_value, priv->start_value); g_value_set_double (&end_value, priv->end_value); GST_LOG ("setting values on controller"); gst_interpolation_control_source_unset_all (priv->control_source); gst_interpolation_control_source_set (priv->control_source, 0, &start_value); gst_interpolation_control_source_set (priv->control_source, duration, &end_value); GST_LOG ("done updating controller"); }
gboolean gst_controller_set (GstController * self, gchar * property_name, GstClockTime timestamp, GValue * value) { gboolean res = FALSE; GstControlledProperty *prop; g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE); g_return_val_if_fail (property_name, FALSE); g_mutex_lock (self->lock); if ((prop = gst_controller_find_controlled_property (self, property_name))) { /* FIXME: backward compat, add GstInterpolationControlSource */ if (!prop->csource) gst_controlled_property_add_interpolation_control_source (prop); if (!GST_IS_INTERPOLATION_CONTROL_SOURCE (prop->csource)) goto out; res = gst_interpolation_control_source_set (GST_INTERPOLATION_CONTROL_SOURCE (prop->csource), timestamp, value); } out: g_mutex_unlock (self->lock); return res; }
gint main (gint argc, gchar ** argv) { gint res = 1; GstElement *src, *sink; GstElement *bin; GstController *ctrl; GstInterpolationControlSource *csource1, *csource2; GstClock *clock; GstClockID clock_id; GstClockReturn wait_ret; GValue vol = { 0, }; gst_init (&argc, &argv); gst_controller_init (&argc, &argv); /* build pipeline */ bin = gst_pipeline_new ("pipeline"); clock = gst_pipeline_get_clock (GST_PIPELINE (bin)); src = gst_element_factory_make ("audiotestsrc", "gen_audio"); if (!src) { GST_WARNING ("need audiotestsrc from gst-plugins-base"); goto Error; } sink = gst_element_factory_make ("autoaudiosink", "play_audio"); if (!sink) { GST_WARNING ("need autoaudiosink from gst-plugins-base"); goto Error; } gst_bin_add_many (GST_BIN (bin), src, sink, NULL); if (!gst_element_link (src, sink)) { GST_WARNING ("can't link elements"); goto Error; } /* square wave g_object_set (G_OBJECT(src), "wave", 1, NULL); */ /* add a controller to the source */ if (!(ctrl = gst_controller_new (G_OBJECT (src), "freq", "volume", NULL))) { GST_WARNING ("can't control source element"); goto Error; } csource1 = gst_interpolation_control_source_new (); csource2 = gst_interpolation_control_source_new (); gst_controller_set_control_source (ctrl, "volume", GST_CONTROL_SOURCE (csource1)); gst_controller_set_control_source (ctrl, "freq", GST_CONTROL_SOURCE (csource2)); /* Set interpolation mode */ gst_interpolation_control_source_set_interpolation_mode (csource1, GST_INTERPOLATE_LINEAR); gst_interpolation_control_source_set_interpolation_mode (csource2, GST_INTERPOLATE_LINEAR); /* set control values */ g_value_init (&vol, G_TYPE_DOUBLE); g_value_set_double (&vol, 0.0); gst_interpolation_control_source_set (csource1, 0 * GST_SECOND, &vol); g_value_set_double (&vol, 1.0); gst_interpolation_control_source_set (csource1, 5 * GST_SECOND, &vol); g_object_unref (csource1); g_value_set_double (&vol, 220.0); gst_interpolation_control_source_set (csource2, 0 * GST_SECOND, &vol); g_value_set_double (&vol, 3520.0); gst_interpolation_control_source_set (csource2, 3 * GST_SECOND, &vol); g_value_set_double (&vol, 440.0); gst_interpolation_control_source_set (csource2, 6 * GST_SECOND, &vol); g_object_unref (csource2); clock_id = gst_clock_new_single_shot_id (clock, gst_clock_get_time (clock) + (7 * GST_SECOND)); /* run for 7 seconds */ if (gst_element_set_state (bin, GST_STATE_PLAYING)) { if ((wait_ret = gst_clock_id_wait (clock_id, NULL)) != GST_CLOCK_OK) { GST_WARNING ("clock_id_wait returned: %d", wait_ret); } gst_element_set_state (bin, GST_STATE_NULL); } /* cleanup */ g_object_unref (G_OBJECT (ctrl)); gst_clock_id_unref (clock_id); gst_object_unref (G_OBJECT (clock)); gst_object_unref (G_OBJECT (bin)); res = 0; Error: return (res); }