mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-20 16:51:10 +00:00
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
|
|
@ -62,11 +62,66 @@ ges_track_transition_update_vcontroller (GESTrackTransition * self,
|
|||
GST_LOG ("done updating controller");
|
||||
}
|
||||
|
||||
static void
|
||||
ges_track_transition_update_acontroller (GESTrackTransition * self,
|
||||
GstElement * gnlobj)
|
||||
{
|
||||
GST_LOG ("updating controller: gnlobj (%p) acontroller(%p) bcontroller(%p)",
|
||||
self->a_acontroller, self->a_bcontroller);
|
||||
|
||||
if (!gnlobj)
|
||||
return;
|
||||
|
||||
if (!(self->a_acontroller) || !(self->a_bcontroller))
|
||||
return;
|
||||
|
||||
GST_LOG ("getting properties");
|
||||
guint64 duration;
|
||||
g_object_get (G_OBJECT (gnlobj), "duration", (guint64 *) & duration, NULL);
|
||||
|
||||
GST_INFO ("duration: %lud\n", duration);
|
||||
|
||||
GValue zero = { 0, };
|
||||
GValue one = { 0, };
|
||||
g_value_init (&zero, G_TYPE_DOUBLE);
|
||||
g_value_init (&one, G_TYPE_DOUBLE);
|
||||
g_value_set_double (&zero, 0.0);
|
||||
g_value_set_double (&one, 1.0);
|
||||
|
||||
GST_LOG ("setting values on controller");
|
||||
|
||||
g_assert (GST_IS_CONTROLLER (self->a_acontroller));
|
||||
g_assert (GST_IS_CONTROL_SOURCE (self->a_acontrol_source));
|
||||
|
||||
g_assert (GST_IS_CONTROLLER (self->a_bcontroller));
|
||||
g_assert (GST_IS_CONTROL_SOURCE (self->a_bcontrol_source));
|
||||
|
||||
gst_interpolation_control_source_unset_all (self->a_acontrol_source);
|
||||
gst_interpolation_control_source_set (self->a_acontrol_source, 0, &one);
|
||||
gst_interpolation_control_source_set (self->a_acontrol_source,
|
||||
duration, &zero);
|
||||
|
||||
gst_interpolation_control_source_unset_all (self->a_bcontrol_source);
|
||||
gst_interpolation_control_source_set (self->a_bcontrol_source, 0, &zero);
|
||||
gst_interpolation_control_source_set (self->a_bcontrol_source,
|
||||
duration, &one);
|
||||
|
||||
GST_LOG ("done updating controller");
|
||||
}
|
||||
|
||||
static void
|
||||
gnlobject_duration_cb (GstElement * gnlobject, GParamSpec * arg
|
||||
G_GNUC_UNUSED, GESTrackTransition * self)
|
||||
{
|
||||
ges_track_transition_update_vcontroller (self, gnlobject);
|
||||
GESTrackType type = ((GESTrackObject *) self)->track->type;
|
||||
GST_LOG ("got duration changed signal");
|
||||
|
||||
if (type == GES_TRACK_TYPE_VIDEO)
|
||||
ges_track_transition_update_vcontroller (self, gnlobject);
|
||||
else if (type == GES_TRACK_TYPE_AUDIO) {
|
||||
GST_LOG ("transition is an audio transition");
|
||||
ges_track_transition_update_acontroller (self, gnlobject);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -149,9 +204,23 @@ link_element_to_mixer_with_smpte (GstBin * bin, GstElement * element,
|
|||
return G_OBJECT (smptealpha);
|
||||
}
|
||||
|
||||
static GObject *
|
||||
link_element_to_mixer_with_volume (GstBin * bin, GstElement * element,
|
||||
GstElement * mixer)
|
||||
{
|
||||
GstElement *volume = gst_element_factory_make ("volume", NULL);
|
||||
gst_bin_add (bin, volume);
|
||||
|
||||
gst_element_link_many (element, volume, mixer, NULL);
|
||||
|
||||
return G_OBJECT (volume);
|
||||
}
|
||||
|
||||
static GstElement *
|
||||
create_video_bin (GESTrackTransition * self)
|
||||
{
|
||||
GST_LOG ("creating a video bin");
|
||||
|
||||
GstElement *topbin = gst_bin_new ("transition-bin");
|
||||
GstElement *iconva = gst_element_factory_make ("ffmpegcolorspace",
|
||||
"tr-csp-a");
|
||||
|
|
@ -223,6 +292,86 @@ create_video_bin (GESTrackTransition * self)
|
|||
return topbin;
|
||||
}
|
||||
|
||||
static GstElement *
|
||||
create_audio_bin (GESTrackTransition * self)
|
||||
{
|
||||
GST_LOG ("creating an audio bin");
|
||||
|
||||
GstElement *topbin = gst_bin_new ("transition-bin");
|
||||
GstElement *iconva = gst_element_factory_make ("audioconvert",
|
||||
"tr-aconv-a");
|
||||
GstElement *iconvb = gst_element_factory_make ("audioconvert",
|
||||
"tr-aconv-b");
|
||||
GstElement *oconv = gst_element_factory_make ("audioconvert",
|
||||
"tr-aconv-output");
|
||||
|
||||
gst_bin_add_many (GST_BIN (topbin), iconva, iconvb, oconv, NULL);
|
||||
|
||||
GObject *atarget, *btarget = NULL;
|
||||
gchar *propname = "volume";
|
||||
GstElement *mixer = NULL;
|
||||
|
||||
mixer = gst_element_factory_make ("adder", NULL);
|
||||
gst_bin_add (GST_BIN (topbin), mixer);
|
||||
|
||||
atarget = link_element_to_mixer_with_volume (GST_BIN (topbin), iconva, mixer);
|
||||
btarget = link_element_to_mixer_with_volume (GST_BIN (topbin), iconvb, mixer);
|
||||
|
||||
g_assert (atarget && btarget);
|
||||
|
||||
gst_element_link (mixer, oconv);
|
||||
|
||||
GstPad *sinka_target = gst_element_get_static_pad (iconva, "sink");
|
||||
GstPad *sinkb_target = gst_element_get_static_pad (iconvb, "sink");
|
||||
GstPad *src_target = gst_element_get_static_pad (oconv, "src");
|
||||
|
||||
GstPad *sinka = gst_ghost_pad_new ("sinka", sinka_target);
|
||||
GstPad *sinkb = gst_ghost_pad_new ("sinkb", sinkb_target);
|
||||
GstPad *src = gst_ghost_pad_new ("src", src_target);
|
||||
|
||||
gst_element_add_pad (topbin, src);
|
||||
gst_element_add_pad (topbin, sinka);
|
||||
gst_element_add_pad (topbin, sinkb);
|
||||
|
||||
/* set up interpolation */
|
||||
|
||||
//g_object_set(atarget, propname, (gdouble) 0, NULL);
|
||||
//g_object_set(btarget, propname, (gdouble) 0, NULL);
|
||||
|
||||
GstController *acontroller, *bcontroller;
|
||||
|
||||
acontroller = gst_object_control_properties (atarget, propname, NULL);
|
||||
bcontroller = gst_object_control_properties (btarget, propname, NULL);
|
||||
|
||||
g_assert (acontroller && bcontroller);
|
||||
|
||||
GstInterpolationControlSource *acontrol_source, *bcontrol_source;
|
||||
|
||||
acontrol_source = gst_interpolation_control_source_new ();
|
||||
gst_controller_set_control_source (acontroller,
|
||||
propname, GST_CONTROL_SOURCE (acontrol_source));
|
||||
gst_interpolation_control_source_set_interpolation_mode (acontrol_source,
|
||||
GST_INTERPOLATE_LINEAR);
|
||||
|
||||
bcontrol_source = gst_interpolation_control_source_new ();
|
||||
gst_controller_set_control_source (bcontroller,
|
||||
propname, GST_CONTROL_SOURCE (bcontrol_source));
|
||||
gst_interpolation_control_source_set_interpolation_mode (bcontrol_source,
|
||||
GST_INTERPOLATE_LINEAR);
|
||||
|
||||
self->a_acontroller = acontroller;
|
||||
self->a_bcontroller = bcontroller;
|
||||
self->a_acontrol_source = acontrol_source;
|
||||
self->a_bcontrol_source = bcontrol_source;
|
||||
|
||||
GST_LOG ("controllers created, updating");
|
||||
|
||||
ges_track_transition_update_acontroller (self,
|
||||
((GESTrackObject *) self)->gnlobject);
|
||||
|
||||
return topbin;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
ges_track_transition_create_gnl_object (GESTrackObject * object)
|
||||
{
|
||||
|
|
@ -243,9 +392,14 @@ ges_track_transition_create_gnl_object (GESTrackObject * object)
|
|||
return TRUE;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
else if ((object->track->type) == GES_TRACK_TYPE_AUDIO) {
|
||||
gst_bin_add (GST_BIN (object->gnlobject), create_audio_bin (self));
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
|
||||
}
|
||||
|
||||
static void
|
||||
ges_track_transition_class_init (GESTrackTransitionClass * klass)
|
||||
|
|
|
|||
Loading…
Reference in a new issue