static GstStateChangeReturn webkit_data_src_change_state(GstElement* element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
WebkitDataSrc* src = WEBKIT_DATA_SRC(element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!src->kid) {
gst_element_post_message(element,
gst_missing_element_message_new(element, "giostreamsrc"));
GST_ELEMENT_ERROR(src, CORE, MISSING_PLUGIN, (0), ("no giostreamsrc"));
return GST_STATE_CHANGE_FAILURE;
}
break;
default:
break;
}
ret = GST_ELEMENT_CLASS(parent_class)->change_state(element, transition);
if (G_UNLIKELY(ret == GST_STATE_CHANGE_FAILURE))
return ret;
// Downwards state change code should be here, after chaining up
// to the parent class.
return ret;
}
static void
post_missing_element_message (GstPlaySinkVideoConvert * self,
const gchar * name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), name);
gst_element_post_message (GST_ELEMENT_CAST (self), msg);
}
static void
gst_play_sink_convert_bin_post_missing_element_message (GstPlaySinkConvertBin *
self, const gchar * name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), name);
gst_element_post_message (GST_ELEMENT_CAST (self), msg);
}
static void
post_missing_plugin_error (GstElement * dec, const gchar * element_name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (dec, element_name);
gst_element_post_message (dec, msg);
GST_ELEMENT_ERROR (dec, CORE, MISSING_PLUGIN,
("Missing element '%s' - check your GStreamer installation.",
element_name), (NULL));
}
static void
post_missing_element_message (GstVaapiDecodeBin * vaapidecbin,
const gchar * missing_factory)
{
GstMessage *msg;
GST_ERROR_OBJECT (vaapidecbin, "Failed to create %s element",
missing_factory);
msg =
gst_missing_element_message_new (GST_ELEMENT_CAST (vaapidecbin),
missing_factory);
gst_element_post_message (GST_ELEMENT_CAST (vaapidecbin), msg);
}
static void
post_missing_element_message (GstVaapiDecodeBin * vaapidecbin,
const gchar * missing_factory)
{
GstMessage *msg;
msg = gst_missing_element_message_new (GST_ELEMENT_CAST (vaapidecbin),
missing_factory);
gst_element_post_message (GST_ELEMENT_CAST (vaapidecbin), msg);
GST_ELEMENT_WARNING (vaapidecbin, CORE, MISSING_PLUGIN,
("Missing element '%s' - check your GStreamer installation.",
missing_factory), ("video decoding might fail"));
}
static void
gst_rg_volume_init (GstRgVolume * self)
{
GObjectClass *volume_class;
GstPad *volume_pad, *ghost_pad;
self->album_mode = DEFAULT_ALBUM_MODE;
self->headroom = DEFAULT_HEADROOM;
self->pre_amp = DEFAULT_PRE_AMP;
self->fallback_gain = DEFAULT_FALLBACK_GAIN;
self->target_gain = 0.0;
self->result_gain = 0.0;
self->volume_element = gst_element_factory_make ("volume", "rgvolume-volume");
if (G_UNLIKELY (self->volume_element == NULL)) {
GstMessage *msg;
GST_WARNING_OBJECT (self, "could not create volume element");
msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), "volume");
gst_element_post_message (GST_ELEMENT_CAST (self), msg);
/* Nothing else to do, we will refuse the state change from NULL to READY to
* indicate that something went very wrong. It is doubtful that someone
* attempts changing our state though, since we end up having no pads! */
return;
}
volume_class = G_OBJECT_GET_CLASS (G_OBJECT (self->volume_element));
self->max_volume = G_PARAM_SPEC_DOUBLE
(g_object_class_find_property (volume_class, "volume"))->maximum;
GST_BIN_CLASS (parent_class)->add_element (GST_BIN_CAST (self),
self->volume_element);
volume_pad = gst_element_get_static_pad (self->volume_element, "sink");
ghost_pad = gst_ghost_pad_new_from_template ("sink", volume_pad,
gst_pad_get_pad_template (volume_pad));
gst_object_unref (volume_pad);
gst_pad_set_event_function (ghost_pad, gst_rg_volume_sink_event);
gst_element_add_pad (GST_ELEMENT_CAST (self), ghost_pad);
volume_pad = gst_element_get_static_pad (self->volume_element, "src");
ghost_pad = gst_ghost_pad_new_from_template ("src", volume_pad,
gst_pad_get_pad_template (volume_pad));
gst_object_unref (volume_pad);
gst_element_add_pad (GST_ELEMENT_CAST (self), ghost_pad);
}
static gboolean
try_create_piece (RsnDvdBin * dvdbin, gint index,
const gchar * factory, GType type, const gchar * name, const gchar * descr)
{
GstElement *e;
DVDBIN_LOCK (dvdbin);
if (dvdbin->pieces[index] != NULL) {
DVDBIN_UNLOCK (dvdbin);
return TRUE; /* Already exists */
}
DVDBIN_UNLOCK (dvdbin);
if (factory != NULL) {
e = gst_element_factory_make (factory, name);
} else {
if (name)
e = g_object_new (type, "name", name, NULL);
else
e = g_object_new (type, NULL);
}
if (e == NULL)
goto create_failed;
if (!gst_bin_add (GST_BIN (dvdbin), e))
goto add_failed;
GST_DEBUG_OBJECT (dvdbin, "Added %s element: %" GST_PTR_FORMAT, descr, e);
DVDBIN_LOCK (dvdbin);
dvdbin->pieces[index] = e;
DVDBIN_UNLOCK (dvdbin);
return TRUE;
create_failed:
gst_element_post_message (GST_ELEMENT_CAST (dvdbin),
gst_missing_element_message_new (GST_ELEMENT_CAST (dvdbin), factory));
GST_ELEMENT_ERROR (dvdbin, CORE, MISSING_PLUGIN, (NULL),
("Could not create %s element '%s'", descr, factory));
return FALSE;
add_failed:
gst_object_unref (e);
GST_ELEMENT_ERROR (dvdbin, CORE, FAILED, (NULL),
("Could not add %s element to bin", descr));
return FALSE;
}
static gboolean
gst_hls_sink_create_elements (GstHlsSink * sink)
{
GstPad *pad = NULL;
GST_DEBUG_OBJECT (sink, "Creating internal elements");
if (sink->elements_created)
return TRUE;
sink->multifilesink = gst_element_factory_make ("multifilesink", NULL);
if (sink->multifilesink == NULL)
goto missing_element;
g_object_set (sink->multifilesink, "location", sink->location,
"next-file", 3, "post-messages", TRUE, "max-files", sink->max_files,
NULL);
gst_bin_add (GST_BIN_CAST (sink), sink->multifilesink);
pad = gst_element_get_static_pad (sink->multifilesink, "sink");
gst_ghost_pad_set_target (GST_GHOST_PAD (sink->ghostpad), pad);
gst_object_unref (pad);
sink->elements_created = TRUE;
return TRUE;
missing_element:
gst_element_post_message (GST_ELEMENT_CAST (sink),
gst_missing_element_message_new (GST_ELEMENT_CAST (sink),
"multifilesink"));
GST_ELEMENT_ERROR (sink, CORE, MISSING_PLUGIN,
(("Missing element '%s' - check your GStreamer installation."),
"multifilesink"), (NULL));
return FALSE;
}
static gboolean
gst_viewfinder_bin_create_elements (GstViewfinderBin * vfbin)
{
GstElement *csp = NULL;
GstElement *videoscale = NULL;
GstPad *firstpad = NULL;
const gchar *missing_element_name;
gboolean newsink = FALSE;
gboolean updated_converters = FALSE;
GST_DEBUG_OBJECT (vfbin, "Creating internal elements");
/* First check if we need to add/replace the internal sink */
if (vfbin->video_sink) {
if (vfbin->user_video_sink && vfbin->video_sink != vfbin->user_video_sink) {
gst_bin_remove (GST_BIN_CAST (vfbin), vfbin->video_sink);
gst_object_unref (vfbin->video_sink);
vfbin->video_sink = NULL;
}
}
if (!vfbin->video_sink) {
if (vfbin->user_video_sink)
vfbin->video_sink = gst_object_ref (vfbin->user_video_sink);
else {
vfbin->video_sink = gst_element_factory_make ("autovideosink",
"vfbin-sink");
if (!vfbin->video_sink) {
missing_element_name = "autovideosink";
goto missing_element;
}
}
gst_bin_add (GST_BIN_CAST (vfbin), gst_object_ref (vfbin->video_sink));
newsink = TRUE;
}
/* check if we want add/remove the conversion elements */
if (vfbin->elements_created && vfbin->disable_converters) {
/* remove the elements, user doesn't want them */
gst_ghost_pad_set_target (GST_GHOST_PAD (vfbin->ghostpad), NULL);
csp = gst_bin_get_by_name (GST_BIN_CAST (vfbin), "vfbin-csp");
videoscale = gst_bin_get_by_name (GST_BIN_CAST (vfbin), "vfbin-videoscale");
gst_bin_remove (GST_BIN_CAST (vfbin), csp);
gst_bin_remove (GST_BIN_CAST (vfbin), videoscale);
gst_object_unref (csp);
gst_object_unref (videoscale);
updated_converters = TRUE;
} else if (!vfbin->elements_created && !vfbin->disable_converters) {
gst_ghost_pad_set_target (GST_GHOST_PAD (vfbin->ghostpad), NULL);
/* add the elements, user wants them */
csp = gst_element_factory_make ("ffmpegcolorspace", "vfbin-csp");
if (!csp) {
missing_element_name = "ffmpegcolorspace";
goto missing_element;
}
gst_bin_add (GST_BIN_CAST (vfbin), csp);
videoscale = gst_element_factory_make ("videoscale", "vfbin->videoscale");
if (!videoscale) {
missing_element_name = "videoscale";
goto missing_element;
}
gst_bin_add (GST_BIN_CAST (vfbin), videoscale);
gst_element_link_pads_full (csp, "src", videoscale, "sink",
GST_PAD_LINK_CHECK_NOTHING);
vfbin->elements_created = TRUE;
GST_DEBUG_OBJECT (vfbin, "Elements succesfully created and linked");
updated_converters = TRUE;
}
/* otherwise, just leave it as is */
/* if sink was replaced -> link it to the internal converters */
if (newsink && !vfbin->disable_converters) {
gboolean unref = FALSE;
if (!videoscale) {
videoscale = gst_bin_get_by_name (GST_BIN_CAST (vfbin),
"vfbin-videscale");
unref = TRUE;
}
if (!gst_element_link_pads_full (videoscale, "src", vfbin->video_sink,
"sink", GST_PAD_LINK_CHECK_CAPS)) {
GST_ELEMENT_ERROR (vfbin, CORE, NEGOTIATION, (NULL),
("linking videoscale and viewfindersink failed"));
}
if (unref)
gst_object_unref (videoscale);
videoscale = NULL;
}
/* Check if we need a new ghostpad target */
if (updated_converters || (newsink && vfbin->disable_converters)) {
if (vfbin->disable_converters) {
firstpad = gst_element_get_static_pad (vfbin->video_sink, "sink");
} else {
/* csp should always exist at this point */
firstpad = gst_element_get_static_pad (csp, "sink");
}
}
/* need to change the ghostpad target if firstpad is set */
if (firstpad) {
if (!gst_ghost_pad_set_target (GST_GHOST_PAD (vfbin->ghostpad), firstpad))
goto error;
gst_object_unref (firstpad);
firstpad = NULL;
}
return TRUE;
missing_element:
gst_element_post_message (GST_ELEMENT_CAST (vfbin),
gst_missing_element_message_new (GST_ELEMENT_CAST (vfbin),
missing_element_name));
GST_ELEMENT_ERROR (vfbin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
missing_element_name), (NULL));
goto error;
error:
GST_WARNING_OBJECT (vfbin, "Creating internal elements failed");
if (firstpad)
gst_object_unref (firstpad);
return FALSE;
}