*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstelement
+ * @title: GstElement
* @short_description: Abstract base class for all pipeline elements
* @see_also: #GstElementFactory, #GstPad
*
*
* An existing pad of an element can be retrieved by name with
* gst_element_get_static_pad(). A new dynamic pad can be created using
- * gst_element_request_pad() with a #GstPadTemplate or
- * gst_element_get_request_pad() with the template name such as "src_\%u".
+ * gst_element_request_pad() with a #GstPadTemplate.
* An iterator of all pads can be retrieved with gst_element_iterate_pads().
*
* Elements can be linked through their pads.
* #GST_ELEMENT_FLAG_REQUIRE_CLOCK() flag is set, a clock should be set on the
* element with gst_element_set_clock().
*
- * Note that clock slection and distribution is normally handled by the
+ * Note that clock selection and distribution is normally handled by the
* toplevel #GstPipeline so the clock functions are only to be used in very
* specific situations.
- *
- * Last reviewed on 2012-03-28 (0.11.3)
*/
#include "gst_private.h"
#include "gstutils.h"
#include "gstinfo.h"
#include "gstquark.h"
+#include "gsttracerutils.h"
#include "gstvalue.h"
#include "gst-i18n-lib.h"
#include "glib-compat-private.h"
+#ifndef GST_DISABLE_GST_DEBUG
+#include "printf/printf.h"
+#endif
+
/* Element signals and args */
enum
{
static void gst_element_class_init (GstElementClass * klass);
static void gst_element_init (GstElement * element);
static void gst_element_base_class_init (gpointer g_class);
-static void gst_element_base_class_finalize (gpointer g_class);
+static void gst_element_constructed (GObject * object);
static void gst_element_dispose (GObject * object);
static void gst_element_finalize (GObject * object);
static gboolean gst_element_set_clock_func (GstElement * element,
GstClock * clock);
static void gst_element_set_bus_func (GstElement * element, GstBus * bus);
+static gboolean gst_element_post_message_default (GstElement * element,
+ GstMessage * message);
+static void gst_element_set_context_default (GstElement * element,
+ GstContext * context);
static gboolean gst_element_default_send_event (GstElement * element,
GstEvent * event);
* gst_element_class_get_request_pad_template (GstElementClass *
element_class, const gchar * name);
+static void gst_element_call_async_func (gpointer data, gpointer user_data);
+
static GstObjectClass *parent_class = NULL;
static guint gst_element_signals[LAST_SIGNAL] = { 0 };
+static GThreadPool *gst_element_pool = NULL;
+
/* this is used in gstelementfactory.c:gst_element_register() */
GQuark __gst_elementclass_factory = 0;
static const GTypeInfo element_info = {
sizeof (GstElementClass),
gst_element_base_class_init,
- gst_element_base_class_finalize,
+ NULL, /* base_class_finalize */
(GClassInitFunc) gst_element_class_init,
NULL,
NULL,
}
static void
+gst_element_setup_thread_pool (void)
+{
+ GError *err = NULL;
+
+ GST_DEBUG ("creating element thread pool");
+ gst_element_pool =
+ g_thread_pool_new ((GFunc) gst_element_call_async_func, NULL, -1, FALSE,
+ &err);
+ if (err != NULL) {
+ g_critical ("could not alloc threadpool %s", err->message);
+ g_clear_error (&err);
+ }
+}
+
+static void
gst_element_class_init (GstElementClass * klass)
{
GObjectClass *gobject_class;
gobject_class->dispose = gst_element_dispose;
gobject_class->finalize = gst_element_finalize;
+ gobject_class->constructed = gst_element_constructed;
klass->change_state = GST_DEBUG_FUNCPTR (gst_element_change_state_func);
klass->set_state = GST_DEBUG_FUNCPTR (gst_element_set_state_func);
klass->query = GST_DEBUG_FUNCPTR (gst_element_default_query);
klass->send_event = GST_DEBUG_FUNCPTR (gst_element_default_send_event);
klass->numpadtemplates = 0;
+ klass->post_message = GST_DEBUG_FUNCPTR (gst_element_post_message_default);
+ klass->set_context = GST_DEBUG_FUNCPTR (gst_element_set_context_default);
klass->elementfactory = NULL;
+
+ gst_element_setup_thread_pool ();
}
static void
element_class->elementfactory =
g_type_get_qdata (G_TYPE_FROM_CLASS (element_class),
__gst_elementclass_factory);
- GST_DEBUG ("type %s : factory %p", G_OBJECT_CLASS_NAME (element_class),
- element_class->elementfactory);
-}
-
-static void
-gst_element_base_class_finalize (gpointer g_class)
-{
- GstElementClass *klass = GST_ELEMENT_CLASS (g_class);
-
- g_list_foreach (klass->padtemplates, (GFunc) gst_object_unref, NULL);
- g_list_free (klass->padtemplates);
-
- gst_structure_free (klass->metadata);
+ GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "type %s : factory %p",
+ G_OBJECT_CLASS_NAME (element_class), element_class->elementfactory);
}
static void
g_cond_init (&element->state_cond);
}
+static void
+gst_element_constructed (GObject * object)
+{
+ GST_TRACER_ELEMENT_NEW (GST_ELEMENT_CAST (object));
+ G_OBJECT_CLASS (parent_class)->constructed (object);
+}
+
/**
* gst_element_release_request_pad:
* @element: a #GstElement to release the request pad of.
* @pad: the #GstPad to release.
*
* Makes the element free the previously requested pad as obtained
- * with gst_element_get_request_pad().
+ * with gst_element_request_pad().
*
* This does not unref the pad. If the pad was created by using
- * gst_element_get_request_pad(), gst_element_release_request_pad() needs to be
+ * gst_element_request_pad(), gst_element_release_request_pad() needs to be
* followed by gst_object_unref() to free the @pad.
*
* MT safe.
g_return_if_fail (GST_PAD_PAD_TEMPLATE (pad) == NULL ||
GST_PAD_TEMPLATE_PRESENCE (GST_PAD_PAD_TEMPLATE (pad)) ==
GST_PAD_REQUEST);
+ g_return_if_fail (GST_PAD_PARENT (pad) == element);
oclass = GST_ELEMENT_GET_CLASS (element);
/* if the element implements a custom release function we call that, else we
* simply remove the pad from the element */
if (oclass->release_pad)
- (oclass->release_pad) (element, pad);
+ oclass->release_pad (element, pad);
else
gst_element_remove_pad (element, pad);
}
* @element: a #GstElement to query
*
* Get the clock provided by the given element.
- * <note>An element is only required to provide a clock in the PAUSED
- * state. Some elements can provide a clock in other states.</note>
+ * > An element is only required to provide a clock in the PAUSED
+ * > state. Some elements can provide a clock in other states.
*
- * Returns: (transfer full): the GstClock provided by the element or %NULL
- * if no clock could be provided. Unref after usage.
+ * Returns: (transfer full) (nullable): the GstClock provided by the
+ * element or %NULL if no clock could be provided. Unref after usage.
*
* MT safe.
*/
/**
* gst_element_set_clock:
* @element: a #GstElement to set the clock for.
- * @clock: the #GstClock to set for the element.
+ * @clock: (transfer none) (allow-none): the #GstClock to set for the element.
*
* Sets the clock for the element. This function increases the
* refcount on the clock. Any previously set clock on the object
* Gets the currently configured clock of the element. This is the clock as was
* last set with gst_element_set_clock().
*
- * Returns: (transfer full): the #GstClock of the element. unref after usage.
+ * Elements in a pipeline will only have their clock set when the
+ * pipeline is in the PLAYING state.
+ *
+ * Returns: (transfer full) (nullable): the #GstClock of the element. unref after usage.
*
* MT safe.
*/
* pipelines, and you can also ensure that the pipelines have the same clock.
*
* MT safe.
- *
- * Since: 0.10.24
*/
void
gst_element_set_start_time (GstElement * element, GstClockTime time)
* MT safe.
*
* Returns: the start time of the element.
- *
- * Since: 0.10.24
*/
GstClockTime
gst_element_get_start_time (GstElement * element)
*
* Gets the index from the element.
*
- * Returns: (transfer full): a #GstIndex or %NULL when no index was set on the
- * element. unref after usage.
+ * Returns: (transfer full) (nullable): a #GstIndex or %NULL when no
+ * index was set on the element. unref after usage.
*
* MT safe.
*/
/**
* gst_element_add_pad:
* @element: a #GstElement to add the pad to.
- * @pad: (transfer full): the #GstPad to add to the element.
+ * @pad: (transfer floating): the #GstPad to add to the element.
*
* Adds a pad (link point) to @element. @pad's parent will be set to @element;
* see gst_object_set_parent() for refcounting information.
*
- * Pads are not automatically activated so elements should perform the needed
- * steps to activate the pad in case this pad is added in the PAUSED or PLAYING
- * state. See gst_pad_set_active() for more information about activating pads.
+ * Pads are automatically activated when added in the PAUSED or PLAYING
+ * state.
*
* The pad and the element should be unlocked when calling this function.
*
gst_element_add_pad (GstElement * element, GstPad * pad)
{
gchar *pad_name;
- gboolean flushing;
+ gboolean active;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
pad_name = g_strdup (GST_PAD_NAME (pad));
GST_CAT_INFO_OBJECT (GST_CAT_ELEMENT_PADS, element, "adding pad '%s'",
GST_STR_NULL (pad_name));
- flushing = GST_PAD_IS_FLUSHING (pad);
+ active = GST_PAD_IS_ACTIVE (pad);
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_NEED_PARENT);
GST_OBJECT_UNLOCK (pad);
GST_OBJECT_CAST (element))))
goto had_parent;
- /* check for flushing pads */
- if (flushing && (GST_STATE (element) > GST_STATE_READY ||
+ /* check for active pads */
+ if (!active && (GST_STATE (element) > GST_STATE_READY ||
GST_STATE_NEXT (element) == GST_STATE_PAUSED)) {
- g_warning ("adding flushing pad '%s' to running element '%s', you need to "
- "use gst_pad_set_active(pad,TRUE) before adding it.",
- GST_STR_NULL (pad_name), GST_ELEMENT_NAME (element));
- /* unset flushing */
- GST_OBJECT_LOCK (pad);
- GST_PAD_UNSET_FLUSHING (pad);
- GST_OBJECT_UNLOCK (pad);
+ gst_pad_set_active (pad, TRUE);
}
g_free (pad_name);
/* add it to the list */
switch (gst_pad_get_direction (pad)) {
case GST_PAD_SRC:
- element->srcpads = g_list_prepend (element->srcpads, pad);
+ element->srcpads = g_list_append (element->srcpads, pad);
element->numsrcpads++;
break;
case GST_PAD_SINK:
- element->sinkpads = g_list_prepend (element->sinkpads, pad);
+ element->sinkpads = g_list_append (element->sinkpads, pad);
element->numsinkpads++;
break;
default:
goto no_direction;
}
- element->pads = g_list_prepend (element->pads, pad);
+ element->pads = g_list_append (element->pads, pad);
element->numpads++;
element->pads_cookie++;
GST_OBJECT_UNLOCK (element);
/* emit the PAD_ADDED signal */
g_signal_emit (element, gst_element_signals[PAD_ADDED], 0, pad);
-
+ GST_TRACER_ELEMENT_ADD_PAD (element, pad);
return TRUE;
/* ERROR cases */
pad_name, GST_ELEMENT_NAME (element));
GST_OBJECT_UNLOCK (element);
g_free (pad_name);
+ gst_object_ref_sink (pad);
+ gst_object_unref (pad);
return FALSE;
}
had_parent:
*
* This function is used by plugin developers and should not be used
* by applications. Pads that were dynamically requested from elements
- * with gst_element_get_request_pad() should be released with the
+ * with gst_element_request_pad() should be released with the
* gst_element_release_request_pad() function instead.
*
* Pads are not automatically deactivated so elements should perform the needed
/* emit the PAD_REMOVED signal before unparenting and losing the last ref. */
g_signal_emit (element, gst_element_signals[PAD_REMOVED], 0, pad);
-
+ GST_TRACER_ELEMENT_REMOVE_PAD (element, pad);
gst_object_unparent (GST_OBJECT_CAST (pad));
return TRUE;
* Retrieves a pad from @element by name. This version only retrieves
* already-existing (i.e. 'static') pads.
*
- * Returns: (transfer full): the requested #GstPad if found, otherwise %NULL.
- * unref after usage.
+ * Returns: (transfer full) (nullable): the requested #GstPad if
+ * found, otherwise %NULL. unref after usage.
*
* MT safe.
*/
return result;
}
-static GstPad *
-_gst_element_request_pad (GstElement * element, GstPadTemplate * templ,
- const gchar * name, const GstCaps * caps)
+static gboolean
+gst_element_is_valid_request_template_name (const gchar * templ_name,
+ const gchar * name)
{
- GstPad *newpad = NULL;
- GstElementClass *oclass;
+ gchar *endptr;
+ const gchar *templ_name_ptr, *name_ptr;
+ gboolean next_specifier;
+ guint templ_postfix_len = 0, name_postfix_len = 0;
- oclass = GST_ELEMENT_GET_CLASS (element);
+ g_return_val_if_fail (templ_name != NULL, FALSE);
+ g_return_val_if_fail (name != NULL, FALSE);
-#ifndef G_DISABLE_CHECKS
- /* Some sanity checking here */
- if (name) {
- GstPad *pad;
+ /* Is this the template name? */
+ if (strcmp (templ_name, name) == 0)
+ return TRUE;
- /* Is this the template name? */
- if (strstr (name, "%") || !strchr (templ->name_template, '%')) {
- g_return_val_if_fail (strcmp (name, templ->name_template) == 0, NULL);
- } else {
- const gchar *str, *data;
- gchar *endptr;
+ /* otherwise check all the specifiers */
+ do {
+ /* Because of sanity checks in gst_pad_template_new(), we know that %s
+ * and %d and %u, occurring at the template_name */
+ templ_name_ptr = strchr (templ_name, '%');
+
+ /* check characters ahead of the specifier */
+ if (!templ_name_ptr || strlen (name) <= templ_name_ptr - templ_name
+ || strncmp (templ_name, name, templ_name_ptr - templ_name) != 0) {
+ return FALSE;
+ }
+
+ /* %s is not allowed for multiple specifiers, just a single specifier can be
+ * accepted in gst_pad_template_new() and can not be mixed with other
+ * specifier '%u' and '%d' */
+ if (*(templ_name_ptr + 1) == 's' && g_strcmp0 (templ_name, name) == 0) {
+ return TRUE;
+ }
+
+ name_ptr = name + (templ_name_ptr - templ_name);
+
+ /* search next specifier, each of specifier should be separated by '_' */
+ templ_name = strchr (templ_name_ptr, '_');
+ name = strchr (name_ptr, '_');
+
+ /* don't match the number of specifiers */
+ if ((templ_name && !name) || (!templ_name && name))
+ return FALSE;
+
+ if (templ_name && name)
+ next_specifier = TRUE;
+ else
+ next_specifier = FALSE;
+
+ /* check characters followed by the specifier */
+ if (*(templ_name_ptr + 2) != '\0' && *(templ_name_ptr + 2) != '_') {
+ if (next_specifier) {
+ templ_postfix_len = templ_name - (templ_name_ptr + 2);
+ name_postfix_len = name - name_ptr;
+ } else {
+ templ_postfix_len = strlen (templ_name_ptr + 2);
+ name_postfix_len = strlen (name_ptr);
+ }
+
+ if (strncmp (templ_name_ptr + 2,
+ name_ptr + name_postfix_len - templ_postfix_len,
+ templ_postfix_len) != 0) {
+ return FALSE;
+ }
+ }
- /* Otherwise check if it's a valid name for the name template */
- str = strchr (templ->name_template, '%');
- g_return_val_if_fail (str != NULL, NULL);
- g_return_val_if_fail (strncmp (templ->name_template, name,
- str - templ->name_template) == 0, NULL);
- g_return_val_if_fail (strlen (name) > str - templ->name_template, NULL);
+ /* verify the specifier */
+ if (*(name_ptr) == '%') {
+ guint len;
- data = name + (str - templ->name_template);
+ len = (next_specifier) ? name - name_ptr : strlen (name_ptr);
- /* Can either be %s or %d or %u, do sanity checking for %d */
- if (*(str + 1) == 'd') {
+ if (strncmp (name_ptr, templ_name_ptr, len) != 0)
+ return FALSE;
+
+ } else {
+ const gchar *specifier;
+ gchar *target = NULL;
+
+ /* extract specifier when it has postfix characters */
+ if (name_postfix_len > templ_postfix_len) {
+ target = g_strndup (name_ptr, name_postfix_len - templ_postfix_len);
+ }
+ specifier = target ? target : name_ptr;
+
+ if (*(templ_name_ptr + 1) == 'd') {
gint64 tmp;
/* it's an int */
- tmp = g_ascii_strtoll (data, &endptr, 10);
- g_return_val_if_fail (tmp >= G_MININT && tmp <= G_MAXINT
- && *endptr == '\0', NULL);
- } else if (*(str + 1) == 'u') {
+ tmp = g_ascii_strtoll (specifier, &endptr, 10);
+ if (tmp < G_MININT || tmp > G_MAXINT || (*endptr != '\0'
+ && *endptr != '_'))
+ return FALSE;
+ } else if (*(templ_name_ptr + 1) == 'u') {
guint64 tmp;
/* it's an int */
- tmp = g_ascii_strtoull (data, &endptr, 10);
- g_return_val_if_fail (tmp <= G_MAXUINT && *endptr == '\0', NULL);
+ tmp = g_ascii_strtoull (specifier, &endptr, 10);
+ if (tmp > G_MAXUINT || (*endptr != '\0' && *endptr != '_'))
+ return FALSE;
}
+
+ g_free (target);
+ }
+
+ /* otherwise we increment these from NULL to 1 */
+ if (next_specifier) {
+ templ_name++;
+ name++;
}
+ } while (next_specifier);
+
+ return TRUE;
+}
+
+static GstPad *
+_gst_element_request_pad (GstElement * element, GstPadTemplate * templ,
+ const gchar * name, const GstCaps * caps)
+{
+ GstPad *newpad = NULL;
+ GstElementClass *oclass;
+
+ oclass = GST_ELEMENT_GET_CLASS (element);
+
+#ifndef G_DISABLE_CHECKS
+ /* Some sanity checking here */
+ if (name) {
+ GstPad *pad;
+
+ g_return_val_if_fail (gst_element_is_valid_request_template_name
+ (templ->name_template, name), NULL);
pad = gst_element_get_static_pad (element, name);
if (pad) {
gst_object_unref (pad);
- /* FIXME 0.11: Change this to g_return_val_if_fail() */
+ /* FIXME 2.0: Change this to g_return_val_if_fail() */
g_critical ("Element %s already has a pad named %s, the behaviour of "
" gst_element_get_request_pad() for existing pads is undefined!",
GST_ELEMENT_NAME (element), name);
* retrieves request pads. The pad should be released with
* gst_element_release_request_pad().
*
- * This method is slow and will be deprecated in the future. New code should
- * use gst_element_request_pad() with the requested template.
+ * This method is slower than manually getting the pad template and calling
+ * gst_element_request_pad() if the pads should have a specific name (e.g.
+ * @name is "src_1" instead of "src_\%u").
*
- * Returns: (transfer full): requested #GstPad if found, otherwise %NULL.
- * Release after usage.
+ * Returns: (transfer full) (nullable): requested #GstPad if found,
+ * otherwise %NULL. Release after usage.
*/
GstPad *
gst_element_get_request_pad (GstElement * element, const gchar * name)
const gchar *req_name = NULL;
gboolean templ_found = FALSE;
GList *list;
- const gchar *data;
- gchar *str, *endptr = NULL;
GstElementClass *class;
g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
class = GST_ELEMENT_GET_CLASS (element);
- /* if the name contains a %, we assume it's the complete template name. Get
- * the template and try to get a pad */
- if (strstr (name, "%")) {
- templ = gst_element_class_get_request_pad_template (class, name);
- req_name = NULL;
- if (templ)
- templ_found = TRUE;
+ templ = gst_element_class_get_request_pad_template (class, name);
+ if (templ) {
+ req_name = strstr (name, "%") ? NULL : name;
+ templ_found = TRUE;
} else {
/* there is no % in the name, try to find a matching template */
list = class->padtemplates;
if (templ->presence == GST_PAD_REQUEST) {
GST_CAT_DEBUG (GST_CAT_PADS, "comparing %s to %s", name,
templ->name_template);
- /* see if we find an exact match */
- if (strcmp (name, templ->name_template) == 0) {
+ if (gst_element_is_valid_request_template_name (templ->name_template,
+ name)) {
templ_found = TRUE;
req_name = name;
break;
}
- /* Because of sanity checks in gst_pad_template_new(), we know that %s
- and %d and %u, occurring at the end of the name_template, are the only
- possibilities. */
- else if ((str = strchr (templ->name_template, '%'))
- && strncmp (templ->name_template, name,
- str - templ->name_template) == 0
- && strlen (name) > str - templ->name_template) {
- data = name + (str - templ->name_template);
- if (*(str + 1) == 'd') {
- glong tmp;
-
- /* it's an int */
- tmp = strtol (data, &endptr, 10);
- if (tmp != G_MINLONG && tmp != G_MAXLONG && endptr &&
- *endptr == '\0') {
- templ_found = TRUE;
- req_name = name;
- break;
- }
- } else if (*(str + 1) == 'u') {
- gulong tmp;
-
- /* it's an int */
- tmp = strtoul (data, &endptr, 10);
- if (tmp != G_MAXULONG && endptr && *endptr == '\0') {
- templ_found = TRUE;
- req_name = name;
- break;
- }
- } else {
- /* it's a string */
- templ_found = TRUE;
- req_name = name;
- break;
- }
- }
}
list = list->next;
}
}
/**
- * gst_element_request_pad:
+ * gst_element_request_pad: (virtual request_new_pad)
* @element: a #GstElement to find a request pad of.
* @templ: a #GstPadTemplate of which we want a pad of.
* @name: (transfer none) (allow-none): the name of the request #GstPad
*
* The pad should be released with gst_element_release_request_pad().
*
- * Returns: (transfer full): requested #GstPad if found, otherwise %NULL.
- * Release after usage.
- *
- * Since: 0.10.32
+ * Returns: (transfer full) (nullable): requested #GstPad if found,
+ * otherwise %NULL. Release after usage.
*/
GstPad *
gst_element_request_pad (GstElement * element,
* be freed after usage. Also more specialized iterators exists such as
* gst_element_iterate_src_pads() or gst_element_iterate_sink_pads().
*
- * Returns: (transfer full): the #GstIterator of #GstPad. Unref each pad
- * after use.
+ * The order of pads returned by the iterator will be the order in which
+ * the pads were added to the element.
+ *
+ * Returns: (transfer full): the #GstIterator of #GstPad.
*
* MT safe.
*/
*
* Retrieves an iterator of @element's source pads.
*
- * Returns: (transfer full): the #GstIterator of #GstPad. Unref each pad
- * after use.
+ * The order of pads returned by the iterator will be the order in which
+ * the pads were added to the element.
+ *
+ * Returns: (transfer full): the #GstIterator of #GstPad.
*
* MT safe.
*/
*
* Retrieves an iterator of @element's sink pads.
*
- * Returns: (transfer full): the #GstIterator of #GstPad. Unref each pad
- * after use.
+ * The order of pads returned by the iterator will be the order in which
+ * the pads were added to the element.
+ *
+ * Returns: (transfer full): the #GstIterator of #GstPad.
*
* MT safe.
*/
return gst_element_iterate_pad_list (element, &element->sinkpads);
}
+static gboolean
+gst_element_do_foreach_pad (GstElement * element,
+ GstElementForeachPadFunc func, gpointer user_data,
+ GList ** p_pads, guint16 * p_npads)
+{
+ gboolean ret = TRUE;
+ GstPad **pads;
+ guint n_pads, i;
+ GList *l;
+
+ g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
+ g_return_val_if_fail (func != NULL, FALSE);
+
+ GST_OBJECT_LOCK (element);
+ n_pads = *p_npads;
+ pads = g_newa (GstPad *, n_pads + 1);
+ for (l = *p_pads, i = 0; l != NULL; l = l->next) {
+ g_assert (i < n_pads);
+ pads[i++] = gst_object_ref (l->data);
+ }
+ GST_OBJECT_UNLOCK (element);
+
+ if (n_pads == 0)
+ return FALSE;
+
+ for (i = 0; i < n_pads; ++i) {
+ ret = func (element, pads[i], user_data);
+ if (!ret)
+ break;
+ }
+
+ for (i = 0; i < n_pads; ++i)
+ gst_object_unref (pads[i]);
+
+ return ret;
+}
+
+/**
+ * gst_element_foreach_sink_pad:
+ * @element: a #GstElement to iterate sink pads of
+ * @func: (scope call): function to call for each sink pad
+ * @user_data: (closure): user data passed to @func
+ *
+ * Call @func with @user_data for each of @element's sink pads. @func will be
+ * called exactly once for each sink pad that exists at the time of this call,
+ * unless one of the calls to @func returns %FALSE in which case we will stop
+ * iterating pads and return early. If new sink pads are added or sink pads
+ * are removed while the sink pads are being iterated, this will not be taken
+ * into account until next time this function is used.
+ *
+ * Returns: %FALSE if @element had no sink pads or if one of the calls to @func
+ * returned %FALSE.
+ *
+ * Since: 1.14
+ */
+gboolean
+gst_element_foreach_sink_pad (GstElement * element,
+ GstElementForeachPadFunc func, gpointer user_data)
+{
+ return gst_element_do_foreach_pad (element, func, user_data,
+ &element->sinkpads, &element->numsinkpads);
+}
+
+/**
+ * gst_element_foreach_src_pad:
+ * @element: a #GstElement to iterate source pads of
+ * @func: (scope call): function to call for each source pad
+ * @user_data: (closure): user data passed to @func
+ *
+ * Call @func with @user_data for each of @element's source pads. @func will be
+ * called exactly once for each source pad that exists at the time of this call,
+ * unless one of the calls to @func returns %FALSE in which case we will stop
+ * iterating pads and return early. If new source pads are added or source pads
+ * are removed while the source pads are being iterated, this will not be taken
+ * into account until next time this function is used.
+ *
+ * Returns: %FALSE if @element had no source pads or if one of the calls
+ * to @func returned %FALSE.
+ *
+ * Since: 1.14
+ */
+gboolean
+gst_element_foreach_src_pad (GstElement * element,
+ GstElementForeachPadFunc func, gpointer user_data)
+{
+ return gst_element_do_foreach_pad (element, func, user_data,
+ &element->srcpads, &element->numsrcpads);
+}
+
+/**
+ * gst_element_foreach_pad:
+ * @element: a #GstElement to iterate pads of
+ * @func: (scope call): function to call for each pad
+ * @user_data: (closure): user data passed to @func
+ *
+ * Call @func with @user_data for each of @element's pads. @func will be called
+ * exactly once for each pad that exists at the time of this call, unless
+ * one of the calls to @func returns %FALSE in which case we will stop
+ * iterating pads and return early. If new pads are added or pads are removed
+ * while pads are being iterated, this will not be taken into account until
+ * next time this function is used.
+ *
+ * Returns: %FALSE if @element had no pads or if one of the calls to @func
+ * returned %FALSE.
+ *
+ * Since: 1.14
+ */
+gboolean
+gst_element_foreach_pad (GstElement * element, GstElementForeachPadFunc func,
+ gpointer user_data)
+{
+ return gst_element_do_foreach_pad (element, func, user_data,
+ &element->pads, &element->numpads);
+}
+
/**
* gst_element_class_add_pad_template:
* @klass: the #GstElementClass to add the pad template to.
- * @templ: (transfer full): a #GstPadTemplate to add to the element class.
+ * @templ: (transfer floating): a #GstPadTemplate to add to the element class.
*
* Adds a padtemplate to an element class. This is mainly used in the _class_init
* functions of classes. If a pad template with the same name as an already
* existing one is added the old one is replaced by the new one.
*
+ * @templ's reference count will be incremented, and any floating
+ * reference will be removed (see gst_object_ref_sink())
+ *
*/
void
gst_element_class_add_pad_template (GstElementClass * klass,
/* Found pad with the same name, replace and return */
if (strcmp (templ->name_template, padtempl->name_template) == 0) {
+ gst_object_ref_sink (padtempl);
gst_object_unref (padtempl);
template_list->data = templ;
return;
}
/**
+ * gst_element_class_add_static_pad_template:
+ * @klass: the #GstElementClass to add the pad template to.
+ * @static_templ: #GstStaticPadTemplate to add as pad template to the element class.
+ *
+ * Adds a pad template to an element class based on the static pad template
+ * @templ. This is mainly used in the _class_init functions of element
+ * implementations. If a pad template with the same name already exists,
+ * the old one is replaced by the new one.
+ *
+ * Since: 1.8
+ */
+void
+gst_element_class_add_static_pad_template (GstElementClass * klass,
+ GstStaticPadTemplate * static_templ)
+{
+ gst_element_class_add_pad_template (klass,
+ gst_static_pad_template_get (static_templ));
+}
+
+/**
+ * gst_element_class_add_static_pad_template_with_gtype:
+ * @klass: the #GstElementClass to add the pad template to.
+ * @static_templ: #GstStaticPadTemplate to add as pad template to the element class.
+ * @pad_type: The #GType of the pad to create
+ *
+ * Adds a pad template to an element class based on the static pad template
+ * @templ. This is mainly used in the _class_init functions of element
+ * implementations. If a pad template with the same name already exists,
+ * the old one is replaced by the new one.
+ *
+ * Since: 1.14
+ */
+void
+gst_element_class_add_static_pad_template_with_gtype (GstElementClass * klass,
+ GstStaticPadTemplate * static_templ, GType pad_type)
+{
+ gst_element_class_add_pad_template (klass,
+ gst_pad_template_new_from_static_pad_template_with_gtype (static_templ,
+ pad_type));
+}
+
+/**
* gst_element_class_add_metadata:
* @klass: class to set metadata for
* @key: the key to set
* multiple author metadata. E.g: "Joe Bloggs <joe.blogs at foo.com>"
*
* Sets the detailed information for a #GstElementClass.
- * <note>This function is for use in _class_init functions only.</note>
+ * > This function is for use in _class_init functions only.
*/
void
gst_element_class_set_metadata (GstElementClass * klass,
const gchar * description, const gchar * author)
{
g_return_if_fail (GST_IS_ELEMENT_CLASS (klass));
+ g_return_if_fail (longname != NULL && *longname != '\0');
+ g_return_if_fail (classification != NULL && *classification != '\0');
+ g_return_if_fail (description != NULL && *description != '\0');
+ g_return_if_fail (author != NULL && *author != '\0');
gst_structure_id_set ((GstStructure *) klass->metadata,
GST_QUARK (ELEMENT_METADATA_LONGNAME), G_TYPE_STRING, longname,
* multiple author metadata. E.g: "Joe Bloggs <joe.blogs at foo.com>"
*
* Sets the detailed information for a #GstElementClass.
- * <note>This function is for use in _class_init functions only.</note>
+ *
+ * > This function is for use in _class_init functions only.
*
* Same as gst_element_class_set_metadata(), but @longname, @classification,
* @description, and @author must be static strings or inlined strings, as
GValue val = G_VALUE_INIT;
g_return_if_fail (GST_IS_ELEMENT_CLASS (klass));
+ g_return_if_fail (longname != NULL && *longname != '\0');
+ g_return_if_fail (classification != NULL && *classification != '\0');
+ g_return_if_fail (description != NULL && *description != '\0');
+ g_return_if_fail (author != NULL && *author != '\0');
g_value_init (&val, G_TYPE_STRING);
}
/**
+ * gst_element_get_metadata:
+ * @element: class to get metadata for
+ * @key: the key to get
+ *
+ * Get metadata with @key in @klass.
+ *
+ * Returns: the metadata for @key.
+ *
+ * Since: 1.14
+ */
+const gchar *
+gst_element_get_metadata (GstElement * element, const gchar * key)
+{
+ g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
+ g_return_val_if_fail (key != NULL, NULL);
+
+ return gst_element_class_get_metadata (GST_ELEMENT_GET_CLASS (element), key);
+}
+
+/**
* gst_element_class_get_pad_template_list:
* @element_class: a #GstElementClass to get pad templates of.
*
* Retrieves a list of the pad templates associated with @element_class. The
* list must not be modified by the calling code.
- * <note>If you use this function in the #GInstanceInitFunc of an object class
- * that has subclasses, make sure to pass the g_class parameter of the
- * #GInstanceInitFunc here.</note>
+ * > If you use this function in the #GInstanceInitFunc of an object class
+ * > that has subclasses, make sure to pass the g_class parameter of the
+ * > #GInstanceInitFunc here.
*
* Returns: (transfer none) (element-type Gst.PadTemplate): the #GList of
* pad templates.
}
/**
+ * gst_element_get_pad_template_list:
+ * @element: a #GstElement to get pad templates of.
+ *
+ * Retrieves a list of the pad templates associated with @element. The
+ * list must not be modified by the calling code.
+ *
+ * Returns: (transfer none) (element-type Gst.PadTemplate): the #GList of
+ * pad templates.
+ *
+ * Since: 1.14
+ */
+GList *
+gst_element_get_pad_template_list (GstElement * element)
+{
+ g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
+
+ return
+ gst_element_class_get_pad_template_list (GST_ELEMENT_GET_CLASS (element));
+}
+
+/**
* gst_element_class_get_pad_template:
* @element_class: a #GstElementClass to get the pad template of.
* @name: the name of the #GstPadTemplate to get.
*
* Retrieves a padtemplate from @element_class with the given name.
- * <note>If you use this function in the #GInstanceInitFunc of an object class
- * that has subclasses, make sure to pass the g_class parameter of the
- * #GInstanceInitFunc here.</note>
+ * > If you use this function in the #GInstanceInitFunc of an object class
+ * > that has subclasses, make sure to pass the g_class parameter of the
+ * > #GInstanceInitFunc here.
*
- * Returns: (transfer none): the #GstPadTemplate with the given name, or %NULL
- * if none was found. No unreferencing is necessary.
+ * Returns: (transfer none) (nullable): the #GstPadTemplate with the
+ * given name, or %NULL if none was found. No unreferencing is
+ * necessary.
*/
GstPadTemplate *
gst_element_class_get_pad_template (GstElementClass *
return NULL;
}
+/**
+ * gst_element_get_pad_template:
+ * @element: a #GstElement to get the pad template of.
+ * @name: the name of the #GstPadTemplate to get.
+ *
+ * Retrieves a padtemplate from @element with the given name.
+ *
+ * Returns: (transfer none) (nullable): the #GstPadTemplate with the
+ * given name, or %NULL if none was found. No unreferencing is
+ * necessary.
+ *
+ * Since: 1.14
+ */
+GstPadTemplate *
+gst_element_get_pad_template (GstElement * element, const gchar * name)
+{
+ g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
+ g_return_val_if_fail (name != NULL, NULL);
+
+ return gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (element),
+ name);
+}
+
static GstPadTemplate *
gst_element_class_get_request_pad_template (GstElementClass *
element_class, const gchar * name)
}
/* get a random pad on element of the given direction.
- * The pad is random in a sense that it is the first pad that is (optionaly) linked.
+ * The pad is random in a sense that it is the first pad that is (optionally) linked.
*/
static GstPad *
gst_element_get_random_pad (GstElement * element,
GstPad *pad;
pad = GST_EVENT_IS_DOWNSTREAM (event) ?
- gst_element_get_random_pad (element, TRUE, GST_PAD_SRC) :
- gst_element_get_random_pad (element, TRUE, GST_PAD_SINK);
+ gst_element_get_random_pad (element, TRUE, GST_PAD_SINK) :
+ gst_element_get_random_pad (element, TRUE, GST_PAD_SRC);
if (pad) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
(GST_PAD_DIRECTION (pad) == GST_PAD_SRC ? "src" : "sink"),
GST_DEBUG_PAD_NAME (pad));
- result = gst_pad_push_event (pad, event);
+ result = gst_pad_send_event (pad, event);
gst_object_unref (pad);
} else {
GST_CAT_INFO (GST_CAT_ELEMENT_PADS, "can't send %s event on element %s",
*
* Sends an event to an element. If the element doesn't implement an
* event handler, the event will be pushed on a random linked sink pad for
- * upstream events or a random linked source pad for downstream events.
+ * downstream events or a random linked source pad for upstream events.
*
- * This function takes owership of the provided event so you should
+ * This function takes ownership of the provided event so you should
* gst_event_ref() it if you want to reuse the event after this call.
*
- * Returns: %TRUE if the event was handled.
- *
* MT safe.
+ *
+ * Returns: %TRUE if the event was handled. Events that trigger a preroll (such
+ * as flushing seeks and steps) will emit %GST_MESSAGE_ASYNC_DONE.
*/
gboolean
gst_element_send_event (GstElement * element, GstEvent * event)
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "send %s event on element %s",
GST_EVENT_TYPE_NAME (event), GST_ELEMENT_NAME (element));
result = oclass->send_event (element, event);
+ } else {
+ gst_event_unref (event);
}
GST_STATE_UNLOCK (element);
* @rate: The new playback rate
* @format: The format of the seek values
* @flags: The optional seek flags.
- * @cur_type: The type and flags for the new current position
- * @cur: The value of the new current position
+ * @start_type: The type and flags for the new start position
+ * @start: The value of the new start position
* @stop_type: The type and flags for the new stop position
* @stop: The value of the new stop position
*
* the parameters. The seek event is sent to the element using
* gst_element_send_event().
*
- * Returns: %TRUE if the event was handled.
- *
* MT safe.
+ *
+ * Returns: %TRUE if the event was handled. Flushing seeks will trigger a
+ * preroll, which will emit %GST_MESSAGE_ASYNC_DONE.
*/
gboolean
gst_element_seek (GstElement * element, gdouble rate, GstFormat format,
- GstSeekFlags flags, GstSeekType cur_type, gint64 cur,
+ GstSeekFlags flags, GstSeekType start_type, gint64 start,
GstSeekType stop_type, gint64 stop)
{
GstEvent *event;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
event =
- gst_event_new_seek (rate, format, flags, cur_type, cur, stop_type, stop);
+ gst_event_new_seek (rate, format, flags, start_type, start, stop_type,
+ stop);
result = gst_element_send_event (element, event);
return result;
*
* Please note that some queries might need a running pipeline to work.
*
- * Returns: TRUE if the query could be performed.
+ * Returns: %TRUE if the query could be performed.
*
* MT safe.
*/
gboolean
gst_element_query (GstElement * element, GstQuery * query)
{
- GstElementClass *oclass;
- gboolean result = FALSE;
+ GstElementClass *klass;
+ gboolean res = FALSE;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (query != NULL, FALSE);
- oclass = GST_ELEMENT_GET_CLASS (element);
+ GST_TRACER_ELEMENT_QUERY_PRE (element, query);
- if (oclass->query) {
+ klass = GST_ELEMENT_GET_CLASS (element);
+ if (klass->query) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "send query on element %s",
GST_ELEMENT_NAME (element));
- result = oclass->query (element, query);
+ res = klass->query (element, query);
}
- return result;
+
+ GST_TRACER_ELEMENT_QUERY_POST (element, query, res);
+ return res;
}
-/**
- * gst_element_post_message:
- * @element: a #GstElement posting the message
- * @message: (transfer full): a #GstMessage to post
- *
- * Post a message on the element's #GstBus. This function takes ownership of the
- * message; if you want to access the message after this call, you should add an
- * additional reference before calling.
- *
- * Returns: %TRUE if the message was successfully posted. The function returns
- * %FALSE if the element did not have a bus.
- *
- * MT safe.
- */
-gboolean
-gst_element_post_message (GstElement * element, GstMessage * message)
+static gboolean
+gst_element_post_message_default (GstElement * element, GstMessage * message)
{
GstBus *bus;
gboolean result = FALSE;
}
/**
+ * gst_element_post_message:
+ * @element: a #GstElement posting the message
+ * @message: (transfer full): a #GstMessage to post
+ *
+ * Post a message on the element's #GstBus. This function takes ownership of the
+ * message; if you want to access the message after this call, you should add an
+ * additional reference before calling.
+ *
+ * Returns: %TRUE if the message was successfully posted. The function returns
+ * %FALSE if the element did not have a bus.
+ *
+ * MT safe.
+ */
+gboolean
+gst_element_post_message (GstElement * element, GstMessage * message)
+{
+ GstElementClass *klass;
+ gboolean res = FALSE;
+
+ g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
+ g_return_val_if_fail (message != NULL, FALSE);
+
+ GST_TRACER_ELEMENT_POST_MESSAGE_PRE (element, message);
+
+ klass = GST_ELEMENT_GET_CLASS (element);
+ if (klass->post_message)
+ res = klass->post_message (element, message);
+ else
+ gst_message_unref (message);
+
+ GST_TRACER_ELEMENT_POST_MESSAGE_POST (element, res);
+ return res;
+}
+
+/**
* _gst_element_error_printf:
- * @format: the printf-like format to use, or %NULL
+ * @format: (allow-none): the printf-like format to use, or %NULL
*
* This function is only used internally by the gst_element_error() macro.
*
- * Returns: (transfer full): a newly allocated string, or %NULL if the format
- * was %NULL or ""
+ * Returns: (transfer full) (nullable): a newly allocated string, or
+ * %NULL if the format was %NULL or ""
*
* MT safe.
*/
{
va_list args;
gchar *buffer;
+ int len;
if (format == NULL)
return NULL;
return NULL;
va_start (args, format);
- buffer = g_strdup_vprintf (format, args);
+
+ len = __gst_vasprintf (&buffer, format, args);
+
va_end (args);
+
+ if (len < 0)
+ buffer = NULL;
+
return buffer;
}
/**
- * gst_element_message_full:
+ * gst_element_message_full_with_details:
* @element: a #GstElement to send message from
* @type: the #GstMessageType
* @domain: the GStreamer GError domain this message belongs to
* @file: the source code file where the error was generated
* @function: the source code function where the error was generated
* @line: the source code line where the error was generated
+ * @structure:(transfer full): optional details structure
*
* Post an error, warning or info message on the bus from inside an element.
*
* @type must be of #GST_MESSAGE_ERROR, #GST_MESSAGE_WARNING or
* #GST_MESSAGE_INFO.
*
- * MT safe.
+ * Since: 1.10
*/
-void gst_element_message_full
+void gst_element_message_full_with_details
(GstElement * element, GstMessageType type,
GQuark domain, gint code, gchar * text,
- gchar * debug, const gchar * file, const gchar * function, gint line)
+ gchar * debug, const gchar * file, const gchar * function, gint line,
+ GstStructure * structure)
{
GError *gerror = NULL;
gchar *name;
switch (type) {
case GST_MESSAGE_ERROR:
message =
- gst_message_new_error (GST_OBJECT_CAST (element), gerror, sent_debug);
+ gst_message_new_error_with_details (GST_OBJECT_CAST (element), gerror,
+ sent_debug, structure);
break;
case GST_MESSAGE_WARNING:
- message = gst_message_new_warning (GST_OBJECT_CAST (element), gerror,
- sent_debug);
+ message =
+ gst_message_new_warning_with_details (GST_OBJECT_CAST (element),
+ gerror, sent_debug, structure);
break;
case GST_MESSAGE_INFO:
- message = gst_message_new_info (GST_OBJECT_CAST (element), gerror,
- sent_debug);
+ message =
+ gst_message_new_info_with_details (GST_OBJECT_CAST (element), gerror,
+ sent_debug, structure);
break;
default:
g_assert_not_reached ();
break;
}
+
gst_element_post_message (element, message);
GST_CAT_INFO_OBJECT (GST_CAT_ERROR_SYSTEM, element, "posted %s message: %s",
}
/**
+ * gst_element_message_full:
+ * @element: a #GstElement to send message from
+ * @type: the #GstMessageType
+ * @domain: the GStreamer GError domain this message belongs to
+ * @code: the GError code belonging to the domain
+ * @text: (allow-none) (transfer full): an allocated text string to be used
+ * as a replacement for the default message connected to code,
+ * or %NULL
+ * @debug: (allow-none) (transfer full): an allocated debug message to be
+ * used as a replacement for the default debugging information,
+ * or %NULL
+ * @file: the source code file where the error was generated
+ * @function: the source code function where the error was generated
+ * @line: the source code line where the error was generated
+ *
+ * Post an error, warning or info message on the bus from inside an element.
+ *
+ * @type must be of #GST_MESSAGE_ERROR, #GST_MESSAGE_WARNING or
+ * #GST_MESSAGE_INFO.
+ *
+ * MT safe.
+ */
+void gst_element_message_full
+ (GstElement * element, GstMessageType type,
+ GQuark domain, gint code, gchar * text,
+ gchar * debug, const gchar * file, const gchar * function, gint line)
+{
+ gst_element_message_full_with_details (element, type, domain, code, text,
+ debug, file, function, line, NULL);
+}
+
+/**
* gst_element_is_locked_state:
* @element: a #GstElement.
*
*
* MT safe.
*
- * Returns: TRUE, if the element's state is locked.
+ * Returns: %TRUE, if the element's state is locked.
*/
gboolean
gst_element_is_locked_state (GstElement * element)
/**
* gst_element_set_locked_state:
* @element: a #GstElement
- * @locked_state: TRUE to lock the element's state
+ * @locked_state: %TRUE to lock the element's state
*
* Locks the state of an element, so state changes of the parent don't affect
* this element anymore.
*
+ * Note that this is racy if the state lock of the parent bin is not taken.
+ * The parent bin might've just checked the flag in another thread and as the
+ * next step proceed to change the child element's state.
+ *
* MT safe.
*
- * Returns: TRUE if the state was changed, FALSE if bad parameters were given
+ * Returns: %TRUE if the state was changed, %FALSE if bad parameters were given
* or the elements state-locking needed no change.
*/
gboolean
* @element: a #GstElement.
*
* Tries to change the state of the element to the same as its parent.
- * If this function returns FALSE, the state of element is undefined.
+ * If this function returns %FALSE, the state of element is undefined.
*
- * Returns: TRUE, if the element's state could be synced to the parent's state.
+ * Returns: %TRUE, if the element's state could be synced to the parent's state.
*
* MT safe.
*/
if (pending)
*pending = GST_STATE_VOID_PENDING;
- GST_CAT_INFO_OBJECT (GST_CAT_STATES, element, "interruped");
+ GST_CAT_INFO_OBJECT (GST_CAT_STATES, element, "interrupted");
GST_OBJECT_UNLOCK (element);
* This method is used internally and should normally not be called by plugins
* or applications.
*
+ * This function must be called with STATE_LOCK held.
+ *
* Returns: The result of the commit state change.
*
* MT safe.
* element will perform the remainder of the state change asynchronously in
* another thread.
* An application can use gst_element_get_state() to wait for the completion
- * of the state change or it can wait for a state change message on the bus.
+ * of the state change or it can wait for a %GST_MESSAGE_ASYNC_DONE or
+ * %GST_MESSAGE_STATE_CHANGED on the bus.
*
* State changes to %GST_STATE_READY or %GST_STATE_NULL never return
* #GST_STATE_CHANGE_ASYNC.
oclass = GST_ELEMENT_GET_CLASS (element);
+ GST_TRACER_ELEMENT_CHANGE_STATE_PRE (element, transition);
+
/* call the state change function so it can set the state */
if (oclass->change_state)
ret = (oclass->change_state) (element, transition);
else
ret = GST_STATE_CHANGE_FAILURE;
+ GST_TRACER_ELEMENT_CHANGE_STATE_POST (element, transition, ret);
+
switch (ret) {
case GST_STATE_CHANGE_FAILURE:
GST_CAT_INFO_OBJECT (GST_CAT_STATES, element,
case GST_STATE_CHANGE_SUCCESS:
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, element,
"element changed state SUCCESS");
- /* we can commit the state now which will proceeed to
+ /* we can commit the state now which will proceed to
* the next state */
ret = gst_element_continue_state (element, ret);
break;
case GST_STATE_CHANGE_NO_PREROLL:
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, element,
"element changed state NO_PREROLL");
- /* we can commit the state now which will proceeed to
+ /* we can commit the state now which will proceed to
* the next state */
ret = gst_element_continue_state (element, ret);
break;
}
/* gst_iterator_fold functions for pads_activate
- * Stop the iterator if activating one pad failed. */
+ * Stop the iterator if activating one pad failed, but only if that pad
+ * has not been removed from the element. */
static gboolean
activate_pads (const GValue * vpad, GValue * ret, gboolean * active)
{
GstPad *pad = g_value_get_object (vpad);
gboolean cont = TRUE;
- if (!(cont = gst_pad_set_active (pad, *active)))
- g_value_set_boolean (ret, FALSE);
+ if (!gst_pad_set_active (pad, *active)) {
+ if (GST_PAD_PARENT (pad) != NULL) {
+ cont = FALSE;
+ g_value_set_boolean (ret, FALSE);
+ }
+ }
return cont;
}
gboolean res;
GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
- "pads_activate with active %d", active);
+ "%s pads", active ? "activate" : "deactivate");
iter = gst_element_iterate_src_pads (element);
res =
goto sink_failed;
GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
- "pads_activate successful");
+ "pad %sactivation successful", active ? "" : "de");
return TRUE;
src_failed:
{
GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
- "source pads_activate failed");
+ "pad %sactivation failed", active ? "" : "de");
return FALSE;
}
sink_failed:
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
- case GST_STATE_CHANGE_READY_TO_NULL:
+ case GST_STATE_CHANGE_READY_TO_NULL:{
+ GList *l;
+
/* deactivate pads in both cases, since they are activated on
ready->paused but the element might not have made it to paused */
if (!gst_element_pads_activate (element, FALSE)) {
result = GST_STATE_CHANGE_FAILURE;
}
+
+ /* Remove all non-persistent contexts */
+ GST_OBJECT_LOCK (element);
+ for (l = element->contexts; l;) {
+ GstContext *context = l->data;
+
+ if (!gst_context_is_persistent (context)) {
+ GList *next;
+
+ gst_context_unref (context);
+ next = l->next;
+ element->contexts = g_list_delete_link (element->contexts, l);
+ l = next;
+ } else {
+ l = l->next;
+ }
+ }
+ GST_OBJECT_UNLOCK (element);
break;
+ }
default:
/* this will catch real but unhandled state changes;
* can only be caused by:
*
* Retrieves the factory that was used to create this element.
*
- * Returns: (transfer none): the #GstElementFactory used for creating this
- * element. no refcounting is needed.
+ * Returns: (transfer none) (nullable): the #GstElementFactory used for creating this
+ * element or %NULL if element has not been registered (static element). no refcounting is needed.
*/
GstElementFactory *
gst_element_get_factory (GstElement * element)
GstClock **clock_p;
GstBus **bus_p;
GstElementClass *oclass;
+ GList *walk;
oclass = GST_ELEMENT_GET_CLASS (element);
- GST_CAT_INFO_OBJECT (GST_CAT_REFCOUNTING, element, "dispose");
+ GST_CAT_INFO_OBJECT (GST_CAT_REFCOUNTING, element, "%p dispose", element);
if (GST_STATE (element) != GST_STATE_NULL)
goto not_null;
- GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
- "removing %d pads", g_list_length (element->pads));
- /* first we break all our links with the outside */
- while (element->pads && element->pads->data) {
- GstPad *pad = GST_PAD_CAST (element->pads->data);
+ /* start by releasing all request pads, this might also remove some dynamic
+ * pads */
+ walk = element->pads;
+ while (walk) {
+ GstPad *pad = GST_PAD_CAST (walk->data);
+
+ walk = walk->next;
- /* don't call _remove_pad with NULL */
if (oclass->release_pad && GST_PAD_PAD_TEMPLATE (pad) &&
GST_PAD_TEMPLATE_PRESENCE (GST_PAD_PAD_TEMPLATE (pad))
- == GST_PAD_REQUEST)
- (oclass->release_pad) (element, GST_PAD_CAST (element->pads->data));
- else
- gst_element_remove_pad (element, GST_PAD_CAST (element->pads->data));
+ == GST_PAD_REQUEST) {
+ GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
+ "removing request pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+ oclass->release_pad (element, pad);
+
+ /* in case the release_pad function removed the next pad too */
+ if (walk && g_list_position (element->pads, walk) == -1)
+ walk = element->pads;
+ }
}
- if (G_UNLIKELY (element->pads != NULL)) {
- g_critical ("could not remove pads from element %s",
- GST_STR_NULL (GST_OBJECT_NAME (object)));
+ /* remove the remaining pads */
+ while (element->pads) {
+ GstPad *pad = GST_PAD_CAST (element->pads->data);
+ GST_CAT_DEBUG_OBJECT (GST_CAT_ELEMENT_PADS, element,
+ "removing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+ if (!gst_element_remove_pad (element, pad)) {
+ /* only happens when someone unparented our pad.. */
+ g_critical ("failed to remove pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+ break;
+ }
}
GST_OBJECT_LOCK (element);
bus_p = &element->bus;
gst_object_replace ((GstObject **) clock_p, NULL);
gst_object_replace ((GstObject **) bus_p, NULL);
+ g_list_free_full (element->contexts, (GDestroyNotify) gst_context_unref);
GST_OBJECT_UNLOCK (element);
- GST_CAT_INFO_OBJECT (GST_CAT_REFCOUNTING, element, "parent class dispose");
+ GST_CAT_INFO_OBJECT (GST_CAT_REFCOUNTING, element, "%p parent class dispose",
+ element);
G_OBJECT_CLASS (parent_class)->dispose (object);
{
GstElement *element = GST_ELEMENT_CAST (object);
- GST_CAT_INFO_OBJECT (GST_CAT_REFCOUNTING, element, "finalize");
+ GST_CAT_INFO_OBJECT (GST_CAT_REFCOUNTING, element, "%p finalize", element);
g_cond_clear (&element->state_cond);
g_rec_mutex_clear (&element->state_lock);
- GST_CAT_INFO_OBJECT (GST_CAT_REFCOUNTING, element, "finalize parent");
+ GST_CAT_INFO_OBJECT (GST_CAT_REFCOUNTING, element, "%p finalize parent",
+ element);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gst_element_set_bus:
* @element: a #GstElement to set the bus of.
- * @bus: (transfer none): the #GstBus to set.
+ * @bus: (transfer none) (allow-none): the #GstBus to set.
*
* Sets the bus of the element. Increases the refcount on the bus.
* For internal use only, unless you're testing elements.
* Returns the bus of the element. Note that only a #GstPipeline will provide a
* bus for the application.
*
- * Returns: (transfer full): the element's #GstBus. unref after usage.
+ * Returns: (transfer full) (nullable): the element's #GstBus. unref after
+ * usage.
*
* MT safe.
*/
return result;
}
+
+static void
+gst_element_set_context_default (GstElement * element, GstContext * context)
+{
+ const gchar *context_type;
+ GList *l;
+
+ g_return_if_fail (GST_IS_CONTEXT (context));
+ context_type = gst_context_get_context_type (context);
+ g_return_if_fail (context_type != NULL);
+
+ GST_OBJECT_LOCK (element);
+ for (l = element->contexts; l; l = l->next) {
+ GstContext *tmp = l->data;
+ const gchar *tmp_type = gst_context_get_context_type (tmp);
+
+ /* Always store newest context but never replace
+ * a persistent one by a non-persistent one */
+ if (g_strcmp0 (context_type, tmp_type) == 0 &&
+ (gst_context_is_persistent (context) ||
+ !gst_context_is_persistent (tmp))) {
+ gst_context_replace ((GstContext **) & l->data, context);
+ break;
+ }
+ }
+ /* Not found? Add */
+ if (l == NULL) {
+ element->contexts =
+ g_list_prepend (element->contexts, gst_context_ref (context));
+ }
+ GST_OBJECT_UNLOCK (element);
+}
+
+/**
+ * gst_element_set_context:
+ * @element: a #GstElement to set the context of.
+ * @context: (transfer none): the #GstContext to set.
+ *
+ * Sets the context of the element. Increases the refcount of the context.
+ *
+ * MT safe.
+ */
+void
+gst_element_set_context (GstElement * element, GstContext * context)
+{
+ GstElementClass *oclass;
+
+ g_return_if_fail (GST_IS_ELEMENT (element));
+ g_return_if_fail (GST_IS_CONTEXT (context));
+
+ oclass = GST_ELEMENT_GET_CLASS (element);
+
+ GST_CAT_DEBUG_OBJECT (GST_CAT_CONTEXT, element,
+ "set context %p %" GST_PTR_FORMAT, context,
+ gst_context_get_structure (context));
+
+ if (oclass->set_context)
+ oclass->set_context (element, context);
+}
+
+/**
+ * gst_element_get_contexts:
+ * @element: a #GstElement to set the context of.
+ *
+ * Gets the contexts set on the element.
+ *
+ * MT safe.
+ *
+ * Returns: (element-type Gst.Context) (transfer full): List of #GstContext
+ *
+ * Since: 1.8
+ */
+GList *
+gst_element_get_contexts (GstElement * element)
+{
+ GList *ret;
+
+ g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
+
+ GST_OBJECT_LOCK (element);
+ ret = g_list_copy_deep (element->contexts, (GCopyFunc) gst_context_ref, NULL);
+ GST_OBJECT_UNLOCK (element);
+
+ return ret;
+}
+
+static gint
+_match_context_type (GstContext * c1, const gchar * context_type)
+{
+ const gchar *c1_type;
+
+ c1_type = gst_context_get_context_type (c1);
+
+ return g_strcmp0 (c1_type, context_type);
+}
+
+/**
+ * gst_element_get_context_unlocked:
+ * @element: a #GstElement to get the context of.
+ * @context_type: a name of a context to retrieve
+ *
+ * Gets the context with @context_type set on the element or NULL.
+ *
+ * Returns: (transfer full) (nullable): A #GstContext or NULL
+ *
+ * Since: 1.8
+ */
+GstContext *
+gst_element_get_context_unlocked (GstElement * element,
+ const gchar * context_type)
+{
+ GstContext *ret = NULL;
+ GList *node;
+
+ g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
+
+ node =
+ g_list_find_custom (element->contexts, context_type,
+ (GCompareFunc) _match_context_type);
+ if (node && node->data)
+ ret = gst_context_ref (node->data);
+
+ return ret;
+}
+
+/**
+ * gst_element_get_context:
+ * @element: a #GstElement to get the context of.
+ * @context_type: a name of a context to retrieve
+ *
+ * Gets the context with @context_type set on the element or NULL.
+ *
+ * MT safe.
+ *
+ * Returns: (transfer full): A #GstContext or NULL
+ *
+ * Since: 1.8
+ */
+GstContext *
+gst_element_get_context (GstElement * element, const gchar * context_type)
+{
+ GstContext *ret = NULL;
+
+ g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
+
+ GST_OBJECT_LOCK (element);
+ ret = gst_element_get_context_unlocked (element, context_type);
+ GST_OBJECT_UNLOCK (element);
+
+ return ret;
+}
+
+static void
+gst_element_property_post_notify_msg (GstElement * element, GObject * obj,
+ GParamSpec * pspec, gboolean include_value)
+{
+ GValue val = G_VALUE_INIT;
+ GValue *v;
+
+ GST_LOG_OBJECT (element, "property '%s' of object %" GST_PTR_FORMAT " has "
+ "changed, posting message with%s value", pspec->name, obj,
+ include_value ? "" : "out");
+
+ if (include_value && (pspec->flags & G_PARAM_READABLE) != 0) {
+ g_value_init (&val, pspec->value_type);
+ g_object_get_property (obj, pspec->name, &val);
+ v = &val;
+ } else {
+ v = NULL;
+ }
+ gst_element_post_message (element,
+ gst_message_new_property_notify (GST_OBJECT_CAST (obj), pspec->name, v));
+}
+
+static void
+gst_element_property_deep_notify_cb (GstElement * element, GObject * prop_obj,
+ GParamSpec * pspec, gpointer user_data)
+{
+ gboolean include_value = GPOINTER_TO_INT (user_data);
+
+ gst_element_property_post_notify_msg (element, prop_obj, pspec,
+ include_value);
+}
+
+static void
+gst_element_property_notify_cb (GObject * obj, GParamSpec * pspec,
+ gpointer user_data)
+{
+ gboolean include_value = GPOINTER_TO_INT (user_data);
+
+ gst_element_property_post_notify_msg (GST_ELEMENT_CAST (obj), obj, pspec,
+ include_value);
+}
+
+/**
+ * gst_element_add_property_notify_watch:
+ * @element: a #GstElement to watch for property changes
+ * @property_name: (allow-none): name of property to watch for changes, or
+ * NULL to watch all properties
+ * @include_value: whether to include the new property value in the message
+ *
+ * Returns: a watch id, which can be used in connection with
+ * gst_element_remove_property_notify_watch() to remove the watch again.
+ *
+ * Since: 1.10
+ */
+gulong
+gst_element_add_property_notify_watch (GstElement * element,
+ const gchar * property_name, gboolean include_value)
+{
+ const gchar *sep;
+ gchar *signal_name;
+ gulong id;
+
+ g_return_val_if_fail (GST_IS_ELEMENT (element), 0);
+
+ sep = (property_name != NULL) ? "::" : NULL;
+ signal_name = g_strconcat ("notify", sep, property_name, NULL);
+ id = g_signal_connect (element, signal_name,
+ G_CALLBACK (gst_element_property_notify_cb),
+ GINT_TO_POINTER (include_value));
+ g_free (signal_name);
+
+ return id;
+}
+
+/**
+ * gst_element_add_property_deep_notify_watch:
+ * @element: a #GstElement to watch (recursively) for property changes
+ * @property_name: (allow-none): name of property to watch for changes, or
+ * NULL to watch all properties
+ * @include_value: whether to include the new property value in the message
+ *
+ * Returns: a watch id, which can be used in connection with
+ * gst_element_remove_property_notify_watch() to remove the watch again.
+ *
+ * Since: 1.10
+ */
+gulong
+gst_element_add_property_deep_notify_watch (GstElement * element,
+ const gchar * property_name, gboolean include_value)
+{
+ const gchar *sep;
+ gchar *signal_name;
+ gulong id;
+
+ g_return_val_if_fail (GST_IS_ELEMENT (element), 0);
+
+ sep = (property_name != NULL) ? "::" : NULL;
+ signal_name = g_strconcat ("deep-notify", sep, property_name, NULL);
+ id = g_signal_connect (element, signal_name,
+ G_CALLBACK (gst_element_property_deep_notify_cb),
+ GINT_TO_POINTER (include_value));
+ g_free (signal_name);
+
+ return id;
+}
+
+/**
+ * gst_element_remove_property_notify_watch:
+ * @element: a #GstElement being watched for property changes
+ * @watch_id: watch id to remove
+ *
+ * Since: 1.10
+ */
+void
+gst_element_remove_property_notify_watch (GstElement * element, gulong watch_id)
+{
+ g_signal_handler_disconnect (element, watch_id);
+}
+
+typedef struct
+{
+ GstElement *element;
+ GstElementCallAsyncFunc func;
+ gpointer user_data;
+ GDestroyNotify destroy_notify;
+} GstElementCallAsyncData;
+
+static void
+gst_element_call_async_func (gpointer data, gpointer user_data)
+{
+ GstElementCallAsyncData *async_data = data;
+
+ async_data->func (async_data->element, async_data->user_data);
+ if (async_data->destroy_notify)
+ async_data->destroy_notify (async_data->user_data);
+ gst_object_unref (async_data->element);
+ g_free (async_data);
+}
+
+/**
+ * gst_element_call_async:
+ * @element: a #GstElement
+ * @func: Function to call asynchronously from another thread
+ * @user_data: Data to pass to @func
+ * @destroy_notify: GDestroyNotify for @user_data
+ *
+ * Calls @func from another thread and passes @user_data to it. This is to be
+ * used for cases when a state change has to be performed from a streaming
+ * thread, directly via gst_element_set_state() or indirectly e.g. via SEEK
+ * events.
+ *
+ * Calling those functions directly from the streaming thread will cause
+ * deadlocks in many situations, as they might involve waiting for the
+ * streaming thread to shut down from this very streaming thread.
+ *
+ * MT safe.
+ *
+ * Since: 1.10
+ */
+void
+gst_element_call_async (GstElement * element, GstElementCallAsyncFunc func,
+ gpointer user_data, GDestroyNotify destroy_notify)
+{
+ GstElementCallAsyncData *async_data;
+
+ g_return_if_fail (GST_IS_ELEMENT (element));
+
+ async_data = g_new0 (GstElementCallAsyncData, 1);
+ async_data->element = gst_object_ref (element);
+ async_data->func = func;
+ async_data->user_data = user_data;
+ async_data->destroy_notify = destroy_notify;
+
+ g_thread_pool_push (gst_element_pool, async_data, NULL);
+}
+
+void
+_priv_gst_element_cleanup (void)
+{
+ if (gst_element_pool) {
+ g_thread_pool_free (gst_element_pool, FALSE, TRUE);
+ gst_element_setup_thread_pool ();
+ }
+}
+
+GstStructure *
+gst_make_element_message_details (const char *name, ...)
+{
+ GstStructure *structure;
+ va_list varargs;
+
+ if (name == NULL)
+ return NULL;
+
+ va_start (varargs, name);
+ structure = gst_structure_new_valist ("details", name, varargs);
+ va_end (varargs);
+
+ return structure;
+}
projects / platform / upstream / gstreamer.git / blobdiff