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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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ges/ges-track-transition.c: implement audio crossfades
This commit is contained in:
Brandon Lewis
Edward Hervey
parent
79ebc389e0
commit
812713cf2f
1 changed files with 157 additions and 3 deletions
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@ -62,11 +62,66 @@ ges_track_transition_update_vcontroller (GESTrackTransition * self,
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GST_LOG ("done updating controller");
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}
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static void
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ges_track_transition_update_acontroller (GESTrackTransition * self,
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GstElement * gnlobj)
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{
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GST_LOG ("updating controller: gnlobj (%p) acontroller(%p) bcontroller(%p)",
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self->a_acontroller, self->a_bcontroller);
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if (!gnlobj)
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return;
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if (!(self->a_acontroller) || !(self->a_bcontroller))
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return;
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GST_LOG ("getting properties");
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guint64 duration;
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g_object_get (G_OBJECT (gnlobj), "duration", (guint64 *) & duration, NULL);
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GST_INFO ("duration: %lud\n", duration);
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GValue zero = { 0, };
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GValue one = { 0, };
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g_value_init (&zero, G_TYPE_DOUBLE);
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g_value_init (&one, G_TYPE_DOUBLE);
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g_value_set_double (&zero, 0.0);
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g_value_set_double (&one, 1.0);
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GST_LOG ("setting values on controller");
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g_assert (GST_IS_CONTROLLER (self->a_acontroller));
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g_assert (GST_IS_CONTROL_SOURCE (self->a_acontrol_source));
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g_assert (GST_IS_CONTROLLER (self->a_bcontroller));
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g_assert (GST_IS_CONTROL_SOURCE (self->a_bcontrol_source));
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gst_interpolation_control_source_unset_all (self->a_acontrol_source);
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gst_interpolation_control_source_set (self->a_acontrol_source, 0, &one);
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gst_interpolation_control_source_set (self->a_acontrol_source,
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duration, &zero);
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gst_interpolation_control_source_unset_all (self->a_bcontrol_source);
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gst_interpolation_control_source_set (self->a_bcontrol_source, 0, &zero);
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gst_interpolation_control_source_set (self->a_bcontrol_source,
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duration, &one);
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GST_LOG ("done updating controller");
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}
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static void
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gnlobject_duration_cb (GstElement * gnlobject, GParamSpec * arg
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G_GNUC_UNUSED, GESTrackTransition * self)
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{
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ges_track_transition_update_vcontroller (self, gnlobject);
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GESTrackType type = ((GESTrackObject *) self)->track->type;
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GST_LOG ("got duration changed signal");
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if (type == GES_TRACK_TYPE_VIDEO)
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ges_track_transition_update_vcontroller (self, gnlobject);
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else if (type == GES_TRACK_TYPE_AUDIO) {
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GST_LOG ("transition is an audio transition");
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ges_track_transition_update_acontroller (self, gnlobject);
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}
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}
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static void
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@ -149,9 +204,23 @@ link_element_to_mixer_with_smpte (GstBin * bin, GstElement * element,
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return G_OBJECT (smptealpha);
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}
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static GObject *
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link_element_to_mixer_with_volume (GstBin * bin, GstElement * element,
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GstElement * mixer)
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{
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GstElement *volume = gst_element_factory_make ("volume", NULL);
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gst_bin_add (bin, volume);
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gst_element_link_many (element, volume, mixer, NULL);
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return G_OBJECT (volume);
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}
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static GstElement *
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create_video_bin (GESTrackTransition * self)
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{
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GST_LOG ("creating a video bin");
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GstElement *topbin = gst_bin_new ("transition-bin");
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GstElement *iconva = gst_element_factory_make ("ffmpegcolorspace",
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"tr-csp-a");
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@ -223,6 +292,86 @@ create_video_bin (GESTrackTransition * self)
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return topbin;
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}
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static GstElement *
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create_audio_bin (GESTrackTransition * self)
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{
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GST_LOG ("creating an audio bin");
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GstElement *topbin = gst_bin_new ("transition-bin");
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GstElement *iconva = gst_element_factory_make ("audioconvert",
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"tr-aconv-a");
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GstElement *iconvb = gst_element_factory_make ("audioconvert",
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"tr-aconv-b");
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GstElement *oconv = gst_element_factory_make ("audioconvert",
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"tr-aconv-output");
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gst_bin_add_many (GST_BIN (topbin), iconva, iconvb, oconv, NULL);
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GObject *atarget, *btarget = NULL;
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gchar *propname = "volume";
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GstElement *mixer = NULL;
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mixer = gst_element_factory_make ("adder", NULL);
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gst_bin_add (GST_BIN (topbin), mixer);
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atarget = link_element_to_mixer_with_volume (GST_BIN (topbin), iconva, mixer);
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btarget = link_element_to_mixer_with_volume (GST_BIN (topbin), iconvb, mixer);
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g_assert (atarget && btarget);
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gst_element_link (mixer, oconv);
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GstPad *sinka_target = gst_element_get_static_pad (iconva, "sink");
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GstPad *sinkb_target = gst_element_get_static_pad (iconvb, "sink");
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GstPad *src_target = gst_element_get_static_pad (oconv, "src");
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GstPad *sinka = gst_ghost_pad_new ("sinka", sinka_target);
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GstPad *sinkb = gst_ghost_pad_new ("sinkb", sinkb_target);
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GstPad *src = gst_ghost_pad_new ("src", src_target);
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gst_element_add_pad (topbin, src);
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gst_element_add_pad (topbin, sinka);
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gst_element_add_pad (topbin, sinkb);
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/* set up interpolation */
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//g_object_set(atarget, propname, (gdouble) 0, NULL);
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//g_object_set(btarget, propname, (gdouble) 0, NULL);
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GstController *acontroller, *bcontroller;
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acontroller = gst_object_control_properties (atarget, propname, NULL);
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bcontroller = gst_object_control_properties (btarget, propname, NULL);
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g_assert (acontroller && bcontroller);
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GstInterpolationControlSource *acontrol_source, *bcontrol_source;
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acontrol_source = gst_interpolation_control_source_new ();
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gst_controller_set_control_source (acontroller,
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propname, GST_CONTROL_SOURCE (acontrol_source));
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gst_interpolation_control_source_set_interpolation_mode (acontrol_source,
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GST_INTERPOLATE_LINEAR);
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bcontrol_source = gst_interpolation_control_source_new ();
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gst_controller_set_control_source (bcontroller,
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propname, GST_CONTROL_SOURCE (bcontrol_source));
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gst_interpolation_control_source_set_interpolation_mode (bcontrol_source,
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GST_INTERPOLATE_LINEAR);
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self->a_acontroller = acontroller;
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self->a_bcontroller = bcontroller;
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self->a_acontrol_source = acontrol_source;
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self->a_bcontrol_source = bcontrol_source;
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GST_LOG ("controllers created, updating");
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ges_track_transition_update_acontroller (self,
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((GESTrackObject *) self)->gnlobject);
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return topbin;
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}
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static gboolean
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ges_track_transition_create_gnl_object (GESTrackObject * object)
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{
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@ -243,9 +392,14 @@ ges_track_transition_create_gnl_object (GESTrackObject * object)
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return TRUE;
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}
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return FALSE;
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}
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else if ((object->track->type) == GES_TRACK_TYPE_AUDIO) {
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gst_bin_add (GST_BIN (object->gnlobject), create_audio_bin (self));
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return TRUE;
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}
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return FALSE;
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}
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static void
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ges_track_transition_class_init (GESTrackTransitionClass * klass)
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