static GstPadProbeReturn
switch_to_smpte_cb (GstPad * sink, gboolean blocked,
GESTrackVideoTransition * transition)
{
GstElement *smptealpha = gst_element_factory_make ("smptealpha", NULL);
GstElement *smptealphab = gst_element_factory_make ("smptealpha", NULL);
GESTrackVideoTransitionPrivate *priv = transition->priv;
if (priv->pending_type == GES_VIDEO_STANDARD_TRANSITION_TYPE_CROSSFADE)
goto beach;
GST_INFO ("Bin %p switching from crossfade to smpte", priv->topbin);
add_smpte_to_bin (priv->sinka, smptealpha, priv);
add_smpte_to_bin (priv->sinkb, smptealphab, priv);
if (priv->pending_border_value != -1) {
g_object_set (smptealphab, "border", priv->pending_border_value, NULL);
priv->pending_border_value = -1;
}
if (priv->pending_inverted) {
g_object_set (smptealphab, "invert", priv->pending_inverted, NULL);
priv->pending_inverted = FALSE;
}
replace_mixer (priv);
priv->start_value = 1.0;
priv->end_value = 0.0;
set_interpolation (GST_OBJECT (smptealphab), priv, (gchar *) "position");
ges_track_video_transition_duration_changed (GES_TRACK_OBJECT (transition),
priv->dur);
priv->sinka = (GstPad *) link_element_to_mixer (smptealpha, priv->mixer);
priv->sinkb = (GstPad *) link_element_to_mixer (smptealphab, priv->mixer);
priv->smpte = smptealphab;
priv->type = priv->pending_type;
GST_INFO ("Bin %p switched from crossfade to smpte", priv->topbin);
beach:
priv->pending_type = GES_VIDEO_STANDARD_TRANSITION_TYPE_NONE;
return GST_PAD_PROBE_REMOVE;
}
static GstPadProbeReturn
switch_to_crossfade_cb (GstPad * sink, gboolean blocked,
GESTrackVideoTransition * transition)
{
GstElement *peera;
GstElement *peerb;
GESTrackVideoTransitionPrivate *priv = transition->priv;
GST_INFO ("Bin %p switching from smpte to crossfade", priv->topbin);
if (priv->pending_type != GES_VIDEO_STANDARD_TRANSITION_TYPE_CROSSFADE)
goto beach;
peera = remove_smpte_from_bin (priv, priv->sinka);
peerb = remove_smpte_from_bin (priv, priv->sinkb);
if (!peera || !peerb)
goto beach;
replace_mixer (priv);
priv->sinka = (GstPad *) link_element_to_mixer (peera, priv->mixer);
priv->sinkb = (GstPad *) link_element_to_mixer (peerb, priv->mixer);
priv->start_value = 0.0;
priv->end_value = 1.0;
set_interpolation (GST_OBJECT (priv->sinkb), priv, (gchar *) "alpha");
ges_track_video_transition_duration_changed (GES_TRACK_OBJECT (transition),
priv->dur);
priv->smpte = NULL;
gst_object_unref (peera);
gst_object_unref (peerb);
priv->type = priv->pending_type;
GST_INFO ("Bin %p switched from smpte to crossfade", priv->topbin);
beach:
priv->pending_type = GES_VIDEO_STANDARD_TRANSITION_TYPE_NONE;
return GST_PAD_PROBE_REMOVE;
}
static GstElement *
ges_track_video_transition_create_element (GESTrackObject * object)
{
GstElement *topbin, *iconva, *iconvb, *scalea, *scaleb, *capsfilt, *oconv;
GstObject *target = NULL;
const gchar *propname = NULL;
GstElement *mixer = NULL;
GstPad *sinka_target, *sinkb_target, *src_target, *sinka, *sinkb, *src,
*srca_pad;
GESTrackVideoTransition *self;
GESTrackVideoTransitionPrivate *priv;
self = GES_TRACK_VIDEO_TRANSITION (object);
priv = self->priv;
GST_LOG ("creating a video bin");
topbin = gst_bin_new ("transition-bin");
iconva = gst_element_factory_make ("videoconvert", "tr-csp-a");
iconvb = gst_element_factory_make ("videoconvert", "tr-csp-b");
scalea = gst_element_factory_make ("videoscale", "vs-a");
scaleb = gst_element_factory_make ("videoscale", "vs-b");
capsfilt = gst_element_factory_make ("capsfilter", "capsfilt");
oconv = gst_element_factory_make ("videoconvert", "tr-csp-output");
gst_bin_add_many (GST_BIN (topbin), iconva, iconvb, scalea, scaleb, capsfilt,
oconv, NULL);
mixer = gst_element_factory_make ("videomixer", NULL);
g_assert (mixer);
g_object_set (G_OBJECT (mixer), "background", 1, NULL);
gst_bin_add (GST_BIN (topbin), mixer);
if (priv->pending_type != GES_VIDEO_STANDARD_TRANSITION_TYPE_CROSSFADE) {
priv->sinka =
(GstPad *) link_element_to_mixer_with_smpte (GST_BIN (topbin), iconva,
mixer, priv->pending_type, NULL);
priv->sinkb =
(GstPad *) link_element_to_mixer_with_smpte (GST_BIN (topbin), iconvb,
mixer, priv->pending_type, &priv->smpte);
target = GST_OBJECT (priv->smpte);
propname = "position";
priv->start_value = 1.0;
priv->end_value = 0.0;
} else {
gst_element_link_pads_full (iconva, "src", scalea, "sink",
GST_PAD_LINK_CHECK_NOTHING);
gst_element_link_pads_full (iconvb, "src", scaleb, "sink",
GST_PAD_LINK_CHECK_NOTHING);
gst_element_link_pads_full (scaleb, "src", capsfilt, "sink",
GST_PAD_LINK_CHECK_NOTHING);
priv->sinka = (GstPad *) link_element_to_mixer (scalea, mixer);
priv->sinkb = (GstPad *) link_element_to_mixer (capsfilt, mixer);
target = GST_OBJECT (priv->sinkb);
propname = "alpha";
priv->start_value = 0.0;
priv->end_value = 1.0;
}
priv->mixer = gst_object_ref (mixer);
fast_element_link (mixer, oconv);
sinka_target = gst_element_get_static_pad (iconva, "sink");
sinkb_target = gst_element_get_static_pad (iconvb, "sink");
src_target = gst_element_get_static_pad (oconv, "src");
sinka = gst_ghost_pad_new ("sinka", sinka_target);
sinkb = gst_ghost_pad_new ("sinkb", sinkb_target);
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);
srca_pad = gst_element_get_static_pad (scalea, "src");
g_signal_connect (srca_pad, "notify::caps", G_CALLBACK (on_caps_set),
(GstElement *) capsfilt);
gst_object_unref (sinka_target);
gst_object_unref (sinkb_target);
gst_object_unref (src_target);
gst_object_unref (srca_pad);
/* set up interpolation */
set_interpolation (target, priv, propname);
priv->topbin = topbin;
priv->type = priv->pending_type;
return topbin;
}
static GstElement *
ges_track_video_transition_create_element (GESTrackObject * object)
{
GstElement *topbin, *iconva, *iconvb, *oconv;
GObject *target = NULL;
const gchar *propname = NULL;
GstElement *mixer = NULL;
GstPad *sinka_target, *sinkb_target, *src_target, *sinka, *sinkb, *src;
GstController *controller;
GstInterpolationControlSource *control_source;
GESTrackVideoTransition *self;
GESTrackVideoTransitionPrivate *priv;
self = GES_TRACK_VIDEO_TRANSITION (object);
priv = self->priv;
GST_LOG ("creating a video bin");
topbin = gst_bin_new ("transition-bin");
iconva = gst_element_factory_make ("ffmpegcolorspace", "tr-csp-a");
iconvb = gst_element_factory_make ("ffmpegcolorspace", "tr-csp-b");
oconv = gst_element_factory_make ("ffmpegcolorspace", "tr-csp-output");
gst_bin_add_many (GST_BIN (topbin), iconva, iconvb, oconv, NULL);
/* Prefer videomixer2 to videomixer */
mixer = gst_element_factory_make ("videomixer2", NULL);
if (mixer == NULL)
mixer = gst_element_factory_make ("videomixer", NULL);
g_object_set (G_OBJECT (mixer), "background", 1, NULL);
gst_bin_add (GST_BIN (topbin), mixer);
if (priv->type != GES_VIDEO_STANDARD_TRANSITION_TYPE_CROSSFADE) {
priv->sinka =
(GstPad *) link_element_to_mixer_with_smpte (GST_BIN (topbin), iconva,
mixer, priv->type, NULL);
priv->sinkb =
(GstPad *) link_element_to_mixer_with_smpte (GST_BIN (topbin), iconvb,
mixer, priv->type, &priv->smpte);
target = (GObject *) priv->smpte;
propname = "position";
priv->start_value = 1.0;
priv->end_value = 0.0;
} else {
priv->sinka = (GstPad *) link_element_to_mixer (iconva, mixer);
priv->sinkb = (GstPad *) link_element_to_mixer (iconvb, mixer);
target = (GObject *) priv->sinkb;
propname = "alpha";
priv->start_value = 0.0;
priv->end_value = 1.0;
}
priv->mixer = gst_object_ref (mixer);
fast_element_link (mixer, oconv);
sinka_target = gst_element_get_static_pad (iconva, "sink");
sinkb_target = gst_element_get_static_pad (iconvb, "sink");
src_target = gst_element_get_static_pad (oconv, "src");
sinka = gst_ghost_pad_new ("sinka", sinka_target);
sinkb = gst_ghost_pad_new ("sinkb", sinkb_target);
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);
gst_object_unref (sinka_target);
gst_object_unref (sinkb_target);
gst_object_unref (src_target);
/* set up interpolation */
g_object_set (target, propname, (gfloat) 0.0, NULL);
controller = gst_object_control_properties (target, propname, NULL);
control_source = gst_interpolation_control_source_new ();
gst_controller_set_control_source (controller,
propname, GST_CONTROL_SOURCE (control_source));
gst_interpolation_control_source_set_interpolation_mode (control_source,
GST_INTERPOLATE_LINEAR);
priv->controller = controller;
priv->control_source = control_source;
return topbin;
}
