GstPad *
gst_ghost_pad_new_from_template (const gchar * name, GstPad * target,
GstPadTemplate * templ)
{
GstPad *ret;
g_return_val_if_fail (GST_IS_PAD (target), NULL);
g_return_val_if_fail (!gst_pad_is_linked (target), NULL);
g_return_val_if_fail (templ != NULL, NULL);
g_return_val_if_fail (GST_PAD_TEMPLATE_DIRECTION (templ) ==
GST_PAD_DIRECTION (target), NULL);
GST_LOG ("name:%s, target:%s:%s, templ:%p", GST_STR_NULL (name),
GST_DEBUG_PAD_NAME (target), templ);
if ((ret = gst_ghost_pad_new_full (name, GST_PAD_DIRECTION (target), templ)))
if (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (ret), target))
goto set_target_failed;
return ret;
/* ERRORS */
set_target_failed:
{
GST_WARNING_OBJECT (ret, "failed to set target %s:%s",
GST_DEBUG_PAD_NAME (target));
gst_object_unref (ret);
return NULL;
}
}
static GstPad *
gst_gl_mixer_bin_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * req_name, const GstCaps * caps)
{
GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
GstPadTemplate *mixer_templ;
struct input_chain *chain;
GstPad *mixer_pad;
chain = g_new0 (struct input_chain, 1);
mixer_templ = _find_element_pad_template (self->mixer,
GST_PAD_TEMPLATE_DIRECTION (templ), GST_PAD_TEMPLATE_PRESENCE (templ));
g_return_val_if_fail (mixer_templ, NULL);
mixer_pad =
gst_element_request_pad (self->mixer, mixer_templ, req_name, NULL);
g_return_val_if_fail (mixer_pad, NULL);
if (!_create_input_chain (self, chain, mixer_pad)) {
gst_element_release_request_pad (self->mixer, mixer_pad);
_free_input_chain (chain);
return NULL;
}
GST_OBJECT_LOCK (element);
self->priv->input_chains = g_list_prepend (self->priv->input_chains, chain);
GST_OBJECT_UNLOCK (element);
gst_child_proxy_child_added (GST_CHILD_PROXY (self),
G_OBJECT (chain->ghost_pad), GST_OBJECT_NAME (chain->ghost_pad));
return GST_PAD (chain->ghost_pad);
}
/**
* gst_ghost_pad_new_no_target_from_template:
* @name: (allow-none): the name of the new pad, or NULL to assign a default name
* @templ: (transfer none): the #GstPadTemplate to create the ghostpad from.
*
* Create a new ghostpad based on @templ, without setting a target. The
* direction will be taken from the @templ.
*
* Returns: (transfer full): a new #GstPad, or NULL in case of an error.
*/
GstPad *
gst_ghost_pad_new_no_target_from_template (const gchar * name,
GstPadTemplate * templ)
{
GstPad *ret;
g_return_val_if_fail (templ != NULL, NULL);
ret =
gst_ghost_pad_new_full (name, GST_PAD_TEMPLATE_DIRECTION (templ), templ);
return ret;
}
static GValueArray *
gst_alsa_device_property_probe_get_values (GstPropertyProbe * probe,
guint prop_id, const GParamSpec * pspec)
{
GstElementClass *klass;
const GList *templates;
snd_pcm_stream_t mode = -1;
GValueArray *array;
GValue value = { 0, };
GList *l, *list;
if (!g_str_equal (pspec->name, "device")) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
return NULL;
}
klass = GST_ELEMENT_GET_CLASS (GST_ELEMENT (probe));
/* I'm pretty sure ALSA has a good way to do this. However, their cool
* auto-generated documentation is pretty much useless if you try to
* do function-wise look-ups. */
/* we assume one pad template at max [zero=mixer] */
templates = gst_element_class_get_pad_template_list (klass);
if (templates) {
if (GST_PAD_TEMPLATE_DIRECTION (templates->data) == GST_PAD_SRC)
mode = SND_PCM_STREAM_CAPTURE;
else
mode = SND_PCM_STREAM_PLAYBACK;
}
list = gst_alsa_get_device_list (mode);
if (list == NULL) {
GST_LOG_OBJECT (probe, "No devices found");
return NULL;
}
array = g_value_array_new (g_list_length (list));
g_value_init (&value, G_TYPE_STRING);
for (l = list; l != NULL; l = l->next) {
GST_LOG_OBJECT (probe, "Found device: %s", (gchar *) l->data);
g_value_take_string (&value, (gchar *) l->data);
l->data = NULL;
g_value_array_append (array, &value);
}
g_value_unset (&value);
g_list_free (list);
return array;
}
static GstPad *
gst_switch_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
{
GstSwitch *swit = GST_SWITCH (element);
GstGhostPad *pad;
INFO ("requesting: %s.%s (%d=%d+%d)", GST_ELEMENT_NAME (swit),
name ? name : GST_PAD_TEMPLATE_NAME_TEMPLATE (templ),
element->numpads, element->numsrcpads, element->numsinkpads);
GST_SWITCH_LOCK (swit);
switch (GST_PAD_TEMPLATE_DIRECTION (templ)) {
case GST_PAD_SRC:
pad = gst_switch_request_new_src_pad (swit, templ, name, caps);
break;
case GST_PAD_SINK:
pad = gst_switch_request_new_sink_pad (swit, templ, name, caps);
break;
default:
pad = NULL;
break;
}
if (pad) {
gst_pad_set_active (GST_PAD (pad), TRUE);
if (gst_element_add_pad (GST_ELEMENT (swit), GST_PAD (pad))) {
GstPad *basepad = gst_ghost_pad_get_target (pad);
GstElement *swcase = GST_ELEMENT (GST_PAD_PARENT (basepad));
GST_OBJECT_FLAG_SET (basepad, GST_SWITCH_PAD_FLAG_GHOSTED);
GST_DEBUG_OBJECT (swit, "New %s:%s on %s:%s",
GST_ELEMENT_NAME (swit), GST_PAD_NAME (pad),
GST_ELEMENT_NAME (swcase), GST_PAD_NAME (basepad));
INFO ("requested %s.%s on %s.%s",
GST_ELEMENT_NAME (swit), GST_PAD_NAME (pad),
GST_ELEMENT_NAME (swcase), GST_PAD_NAME (basepad));
}
}
GST_SWITCH_UNLOCK (swit);
return GST_PAD (pad);
}
static GstPadTemplate *
_find_element_pad_template (GstElement * element,
GstPadDirection direction, GstPadPresence presence)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
GList *templ_list = gst_element_class_get_pad_template_list (klass);
GstPadTemplate *templ;
/* find suitable template */
while (templ_list) {
templ = (GstPadTemplate *) templ_list->data;
if (GST_PAD_TEMPLATE_DIRECTION (templ) != direction
|| GST_PAD_TEMPLATE_PRESENCE (templ) != presence) {
templ_list = templ_list->next;
templ = NULL;
continue;
}
break;
}
return templ;
}
static gboolean
connect_element (InsanityTest * test, GstElement * demux)
{
GList *pads;
gboolean res = TRUE;
gboolean dynamic = FALSE;
GList *to_connect = NULL;
/* 1. Loop over pad templates, grabbing existing pads along the way */
for (pads = GST_ELEMENT_GET_CLASS (demux)->padtemplates; pads;
pads = g_list_next (pads)) {
GstPadTemplate *templ = GST_PAD_TEMPLATE (pads->data);
const gchar *templ_name;
/* we are only interested in source pads */
if (GST_PAD_TEMPLATE_DIRECTION (templ) != GST_PAD_SRC)
continue;
templ_name = GST_PAD_TEMPLATE_NAME_TEMPLATE (templ);
/* figure out what kind of pad this is */
switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
case GST_PAD_ALWAYS:
{
GstPad *pad = gst_element_get_static_pad (demux, templ_name);
/* We concider the demuxer is not broken, and thus always
* pads are always here */
to_connect = g_list_prepend (to_connect, pad);
break;
}
case GST_PAD_SOMETIMES:
{
/* try to get the pad to see if it is already created or
* not */
GstPad *pad = gst_element_get_static_pad (demux, templ_name);
if (pad) {
/* the pad is created, we need to try to link to it */
to_connect = g_list_prepend (to_connect, pad);
} else {
/* we have an element that will create dynamic pads */
dynamic = TRUE;
}
break;
}
case GST_PAD_REQUEST:
/* ignore request pads */
break;
}
}
/* 2. if there are more potential pads, connect to signal */
if (dynamic) {
g_signal_connect (glob_demuxer, "pad-added", G_CALLBACK (pad_added_cb),
test);
}
/* 3. for every available pad, check if we can connect it */
for (pads = to_connect; pads; pads = g_list_next (pads)) {
GstPad *pad = GST_PAD_CAST (pads->data);
pad_added_cb (demux, pad, test);
gst_object_unref (pad);
}
g_list_free (to_connect);
return res;
}
