/* * GStreamer * * Copyright 2013 Collabora Ltd * @author: Olivier Crete * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * 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. * */ /** * SECTION:gstinsertbin * @short_description: A #GstBin to insertally link filter-like elements. * * This element is a #GstBin that has a single source and sink pad. It allows * the user (the application) to easily add and remove filter-like element * (that has a single source and sink pad), to the pipeline while it is running. * It features a fully asynchronous API inspired by GLib's GAsyncResult based * APIs. * * Each operation (addition or removal) can take a callback, this callback * is guaranteed to be called. Unlike GIO, there is no guarantee about where * this callback will be called from, it could be called before the action * returns or it could be called later from another thread. The signature of * this callback GstInsertBinCallback(). * * Since: 1.2 */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstinsertbin.h" GST_DEBUG_CATEGORY_STATIC (insert_bin_debug); #define GST_CAT_DEFAULT (insert_bin_debug) static GstStaticPadTemplate gst_insert_bin_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); static GstStaticPadTemplate gst_insert_bin_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); enum { SIG_PREPEND, SIG_APPEND, SIG_INSERT_BEFORE, SIG_INSERT_AFTER, SIG_REMOVE, LAST_SIGNAL }; static guint signals[LAST_SIGNAL]; enum { PROP_0, }; struct _GstInsertBinPrivate { GstPad *srcpad; GstPad *sinkpad; GQueue change_queue; }; typedef enum { GST_INSERT_BIN_ACTION_ADD, GST_INSERT_BIN_ACTION_REMOVE } GstInsertBinAction; typedef enum { DIRECTION_NONE, DIRECTION_AFTER, DIRECTION_BEFORE } GstInsertBinDirection; struct ChangeData { GstElement *element; GstInsertBinAction action; GstElement *sibling; GstInsertBinDirection direction; GstInsertBinCallback callback; gpointer user_data; }; static void gst_insert_bin_dispose (GObject * object); static void gst_insert_bin_do_change (GstInsertBin * self, GstPad * pad); static GstPadProbeReturn pad_blocked_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data); G_DEFINE_TYPE (GstInsertBin, gst_insert_bin, GST_TYPE_BIN); static void gst_insert_bin_class_init (GstInsertBinClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *gstelement_class = (GstElementClass *) klass; GST_DEBUG_CATEGORY_INIT (insert_bin_debug, "insertbin", 0, "Insert Bin"); g_type_class_add_private (klass, sizeof (GstInsertBinPrivate)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&gst_insert_bin_src_template)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&gst_insert_bin_sink_template)); gst_element_class_set_static_metadata (gstelement_class, "Insert Bin", "Generic/Bin/Filter", "Auto-links filter style elements insertally", "Olivier Crete "); gobject_class->dispose = gst_insert_bin_dispose; /** * GstInsertBin::prepend: * @element: the #GstElement to add * @callback: the callback to call when the element has been added or not, or * %NULL * @user_data: The data to pass to the callback * @user_data2: The user data of the signal (ignored) * * This action signal adds the filter like element before any other element * in the bin. * * Same as gst_insert_bin_prepend() */ signals[SIG_PREPEND] = g_signal_new_class_handler ("prepend", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_CALLBACK (gst_insert_bin_prepend), NULL, NULL, NULL, G_TYPE_NONE, 3, GST_TYPE_ELEMENT, G_TYPE_POINTER, G_TYPE_POINTER); /** * GstInsertBin::append: * @element: the #GstElement to add * @callback: the callback to call when the element has been added or not, or * %NULL * @user_data: The data to pass to the callback * @user_data2: The user data of the signal (ignored) * * This action signal adds the filter like element after any other element * in the bin. * * Same as gst_insert_bin_append() */ signals[SIG_APPEND] = g_signal_new_class_handler ("append", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_CALLBACK (gst_insert_bin_append), NULL, NULL, NULL, G_TYPE_NONE, 3, GST_TYPE_ELEMENT, G_TYPE_POINTER, G_TYPE_POINTER); /** * GstInsertBin::insert-before: * @element: the #GstElement to add * @sibling: the #GstElement to add @element before * @callback: the callback to call when the element has been added or not, or * %NULL * @user_data: The data to pass to the callback * @user_data2: The user data of the signal (ignored) * * This action signal adds the filter like element before the @sibling * element in the bin. * * Same as gst_insert_bin_insert_before() */ signals[SIG_INSERT_BEFORE] = g_signal_new_class_handler ("insert-before", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_CALLBACK (gst_insert_bin_insert_before), NULL, NULL, NULL, G_TYPE_NONE, 4, GST_TYPE_ELEMENT, GST_TYPE_ELEMENT, G_TYPE_POINTER, G_TYPE_POINTER); /** * GstInsertBin::insert-after: * @element: the #GstElement to add * @sibling: the #GstElement to add @element after * @callback: the callback to call when the element has been added or not, or * %NULL * @user_data: The data to pass to the callback * @user_data2: The user data of the signal (ignored) * * This action signal adds the filter like element after the @sibling * element in the bin. * element in the bin. * * Same as gst_insert_bin_insert_after() */ signals[SIG_INSERT_AFTER] = g_signal_new_class_handler ("insert-after", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_CALLBACK (gst_insert_bin_insert_after), NULL, NULL, NULL, G_TYPE_NONE, 4, GST_TYPE_ELEMENT, GST_TYPE_ELEMENT, G_TYPE_POINTER, G_TYPE_POINTER); /** * GstInsertBin::remove: * @element: the #GstElement to remove * @callback: the callback to call when the element has been removed or not, * or %NULL * @user_data: The data to pass to the callback * @user_data2: The user data of the signal (ignored) * * This action signal removed the filter like element from the bin. * * Same as gst_insert_bin_remove() */ signals[SIG_REMOVE] = g_signal_new_class_handler ("remove", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_CALLBACK (gst_insert_bin_remove), NULL, NULL, NULL, G_TYPE_NONE, 3, GST_TYPE_ELEMENT, G_TYPE_POINTER, G_TYPE_POINTER); } static void change_data_free (struct ChangeData *data) { gst_object_unref (data->element); if (data->sibling) gst_object_unref (data->sibling); g_slice_free (struct ChangeData, data); } static void gst_insert_bin_change_data_complete (GstInsertBin * self, struct ChangeData *data, gboolean success) { if (data->callback) data->callback (self, data->element, success, data->user_data); change_data_free (data); } static void gst_insert_bin_init (GstInsertBin * self) { GstProxyPad *internal; self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_INSERT_BIN, GstInsertBinPrivate); g_queue_init (&self->priv->change_queue); self->priv->sinkpad = gst_ghost_pad_new_no_target_from_template ("sink", gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (self), "sink")); gst_element_add_pad (GST_ELEMENT (self), self->priv->sinkpad); internal = gst_proxy_pad_get_internal (GST_PROXY_PAD (self->priv->sinkpad)); self->priv->srcpad = gst_ghost_pad_new_from_template ("src", GST_PAD (internal), gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (self), "src")); gst_object_unref (internal); gst_element_add_pad (GST_ELEMENT (self), self->priv->srcpad); } static void gst_insert_bin_dispose (GObject * object) { GstInsertBin *self = GST_INSERT_BIN (object); struct ChangeData *data; while ((data = g_queue_pop_head (&self->priv->change_queue))) gst_insert_bin_change_data_complete (self, data, FALSE); gst_ghost_pad_set_target (GST_GHOST_PAD (self->priv->srcpad), NULL); gst_ghost_pad_set_target (GST_GHOST_PAD (self->priv->sinkpad), NULL); G_OBJECT_CLASS (gst_insert_bin_parent_class)->dispose (object); } static gboolean validate_element (GstInsertBin * self, GstElement * element) { gboolean valid = TRUE;; GST_OBJECT_LOCK (element); if (element->numsrcpads != 1 || element->numsinkpads != 1) { GST_WARNING_OBJECT (self, "Element does not have a single src and sink pad"); valid = FALSE; } if (GST_OBJECT_PARENT (element) != NULL) { GST_WARNING_OBJECT (self, "Element already has a parent"); valid = FALSE; } GST_OBJECT_UNLOCK (element); return valid; } static GstPad * get_single_pad (GstElement * element, GstPadDirection direction) { GstPad *pad = NULL; GST_OBJECT_LOCK (element); if (direction == GST_PAD_SRC) { if (element->numsrcpads == 1) pad = element->srcpads->data; } else { if (element->numsinkpads == 1) pad = element->sinkpads->data; } if (pad) gst_object_ref (pad); GST_OBJECT_UNLOCK (element); return pad; } static gboolean is_right_direction_for_block (GstPad * pad) { gboolean right_direction; GST_OBJECT_LOCK (pad); switch (pad->mode) { case GST_PAD_MODE_NONE: right_direction = TRUE; break; case GST_PAD_MODE_PUSH: right_direction = (pad->direction == GST_PAD_SRC); break; case GST_PAD_MODE_PULL: right_direction = (pad->direction == GST_PAD_SINK); break; default: right_direction = FALSE; g_assert_not_reached (); } GST_OBJECT_UNLOCK (pad); return right_direction; } static void gst_insert_bin_block_pad_unlock (GstInsertBin * self) { struct ChangeData *data; GstPad *pad; GstPadProbeType probetype; again: data = g_queue_peek_head (&self->priv->change_queue); if (!data) { GST_OBJECT_UNLOCK (self); return; } if (data->action == GST_INSERT_BIN_ACTION_ADD && !validate_element (self, data->element)) goto error; if (data->action == GST_INSERT_BIN_ACTION_ADD) { if (data->sibling) { if (data->direction == DIRECTION_BEFORE) pad = get_single_pad (data->sibling, GST_PAD_SINK); else pad = get_single_pad (data->sibling, GST_PAD_SRC); } else { if (data->direction == DIRECTION_BEFORE) pad = (GstPad *) gst_proxy_pad_get_internal (GST_PROXY_PAD (self->priv->srcpad)); else pad = (GstPad *) gst_proxy_pad_get_internal (GST_PROXY_PAD (self->priv->sinkpad)); } if (!pad) { GST_WARNING_OBJECT (self, "Can not obtain a sibling pad to block" " before adding"); goto error; } if (!is_right_direction_for_block (pad)) { GstPad *peer = gst_pad_get_peer (pad); if (peer) { gst_object_unref (pad); pad = peer; } } } else { GstPad *element_pad; element_pad = get_single_pad (data->element, GST_PAD_SINK); if (!element_pad) { GST_WARNING_OBJECT (self, "Can not obtain the element's sink pad"); goto error; } if (!is_right_direction_for_block (element_pad)) { pad = gst_pad_get_peer (element_pad); } else { gst_object_unref (element_pad); element_pad = get_single_pad (data->element, GST_PAD_SRC); if (!element_pad) { GST_WARNING_OBJECT (self, "Can not obtain the element's src pad"); goto error; } pad = gst_pad_get_peer (element_pad); } gst_object_unref (element_pad); if (!pad) { GST_WARNING_OBJECT (self, "Can not obtain a sibling pad for removing"); goto error; } } if (GST_PAD_IS_SRC (pad)) probetype = GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM; else probetype = GST_PAD_PROBE_TYPE_BLOCK_UPSTREAM; GST_OBJECT_UNLOCK (self); gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_IDLE | probetype, pad_blocked_cb, self, NULL); gst_object_unref (pad); return; error: g_queue_pop_head (&self->priv->change_queue); gst_insert_bin_change_data_complete (self, data, FALSE); goto again; } static GstPadProbeReturn wait_and_drop_eos_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GstPad *peer; if (GST_EVENT_TYPE (GST_PAD_PROBE_INFO_EVENT (info)) != GST_EVENT_EOS) return GST_PAD_PROBE_PASS; peer = gst_pad_get_peer (pad); if (peer) { gst_pad_unlink (pad, peer); gst_object_unref (peer); } return GST_PAD_PROBE_DROP; } static void gst_insert_bin_do_change (GstInsertBin * self, GstPad * pad) { struct ChangeData *data; GST_OBJECT_LOCK (self); if (!is_right_direction_for_block (pad)) { GST_WARNING_OBJECT (self, "Block pad does not have the expected direction"); goto next; } while ((data = g_queue_pop_head (&self->priv->change_queue)) != NULL) { GstPad *peer = NULL; GstPad *other_peer = NULL; GST_OBJECT_UNLOCK (self); if (data->action == GST_INSERT_BIN_ACTION_ADD && !validate_element (self, data->element)) goto error; peer = gst_pad_get_peer (pad); if (peer == NULL) { GST_WARNING_OBJECT (self, "Blocked pad has no peer"); goto error; } if (data->action == GST_INSERT_BIN_ACTION_ADD) { GstPad *srcpad = NULL, *sinkpad = NULL; GstPad *peersrcpad, *peersinkpad; /* First let's make sure we have the right pad */ if (data->sibling) { GstElement *parent = NULL; GstPad *siblingpad; if ((gst_pad_get_direction (pad) == GST_PAD_SRC && data->direction == DIRECTION_BEFORE) || (gst_pad_get_direction (pad) == GST_PAD_SINK && data->direction == DIRECTION_AFTER)) siblingpad = peer; else siblingpad = pad; parent = gst_pad_get_parent_element (siblingpad); if (parent != NULL) gst_object_unref (parent); if (parent != data->sibling) goto retry; } else { GstObject *parent; GstPad *ghost; GstPad *proxypad; if (data->direction == DIRECTION_BEFORE) { ghost = self->priv->srcpad; if (gst_pad_get_direction (pad) == GST_PAD_SINK) proxypad = pad; else proxypad = peer; } else { ghost = self->priv->sinkpad; if (gst_pad_get_direction (pad) == GST_PAD_SINK) proxypad = peer; else proxypad = pad; } if (!GST_IS_PROXY_PAD (proxypad)) goto retry; parent = gst_pad_get_parent (proxypad); if (!parent) goto retry; gst_object_unref (parent); if (GST_PAD_CAST (parent) != ghost) goto retry; } if (gst_pad_get_direction (pad) == GST_PAD_SRC) { peersrcpad = pad; peersinkpad = peer; } else { peersrcpad = peer; peersinkpad = pad; } if (GST_IS_PROXY_PAD (peersrcpad)) { GstObject *parent = gst_pad_get_parent (peersrcpad); if (GST_PAD_CAST (parent) == self->priv->sinkpad) peersrcpad = NULL; if (parent) gst_object_unref (parent); } if (GST_IS_PROXY_PAD (peersinkpad)) { GstObject *parent = gst_pad_get_parent (peersinkpad); if (GST_PAD_CAST (parent) == self->priv->srcpad) peersinkpad = NULL; if (parent) gst_object_unref (parent); } if (peersinkpad && peersrcpad) { gst_pad_unlink (peersrcpad, peersinkpad); } else { if (!peersinkpad) gst_ghost_pad_set_target (GST_GHOST_PAD (self->priv->srcpad), NULL); if (!peersrcpad) gst_ghost_pad_set_target (GST_GHOST_PAD (self->priv->sinkpad), NULL); } srcpad = get_single_pad (data->element, GST_PAD_SRC); sinkpad = get_single_pad (data->element, GST_PAD_SINK); if (srcpad == NULL || sinkpad == NULL) { GST_WARNING_OBJECT (self, "Can not get element src or sink pad"); goto error; } if (!gst_bin_add (GST_BIN (self), data->element)) { GST_WARNING_OBJECT (self, "Can not add element to bin"); goto error; } if (peersrcpad) { if (GST_PAD_LINK_FAILED (gst_pad_link (peersrcpad, sinkpad))) { GST_WARNING_OBJECT (self, "Can not link sibling's %s:%s pad" " to element's %s:%s pad", GST_DEBUG_PAD_NAME (peersrcpad), GST_DEBUG_PAD_NAME (sinkpad)); goto error; } } else { if (!gst_ghost_pad_set_target (GST_GHOST_PAD (self->priv->sinkpad), sinkpad)) { GST_WARNING_OBJECT (self, "Can not set %s:%s as target for %s:%s", GST_DEBUG_PAD_NAME (sinkpad), GST_DEBUG_PAD_NAME (self->priv->sinkpad)); goto error; } } if (peersinkpad) { if (GST_PAD_LINK_FAILED (gst_pad_link (srcpad, peersinkpad))) { GST_WARNING_OBJECT (self, "Can not link element's %s:%s pad" " to sibling's %s:%s pad", GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (peersinkpad)); goto error; } } else { if (!gst_ghost_pad_set_target (GST_GHOST_PAD (self->priv->srcpad), srcpad)) { GST_WARNING_OBJECT (self, "Can not set %s:%s as target for %s:%s", GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (self->priv->srcpad)); goto error; } } gst_object_unref (srcpad); gst_object_unref (sinkpad); if (!gst_element_sync_state_with_parent (data->element)) { GST_WARNING_OBJECT (self, "Can not sync element's state with parent"); goto error; } } else { GstElement *parent = NULL; GstPad *other_pad; GstCaps *caps = NULL, *peercaps = NULL; gboolean can_intersect; gboolean success; parent = gst_pad_get_parent_element (peer); if (parent != NULL) gst_object_unref (parent); if (parent != data->element) goto retry; if (gst_pad_get_direction (peer) == GST_PAD_SRC) other_pad = get_single_pad (data->element, GST_PAD_SINK); else other_pad = get_single_pad (data->element, GST_PAD_SRC); if (!other_pad) { GST_WARNING_OBJECT (self, "Can not get element's other pad"); goto error; } other_peer = gst_pad_get_peer (other_pad); gst_object_unref (other_pad); if (!other_peer) { GST_WARNING_OBJECT (self, "Can not get element's other peer"); goto error; } /* Get the negotiated caps for the source pad peer, * because renegotiation while the pipeline is playing doesn't work * that fast. */ if (gst_pad_get_direction (pad) == GST_PAD_SRC) caps = gst_pad_get_current_caps (pad); else peercaps = gst_pad_get_current_caps (other_peer); if (!caps) caps = gst_pad_query_caps (pad, NULL); if (!peercaps) peercaps = gst_pad_query_caps (other_peer, NULL); can_intersect = gst_caps_can_intersect (caps, peercaps); gst_caps_unref (caps); gst_caps_unref (peercaps); if (!can_intersect) { GST_WARNING_OBJECT (self, "Pads are incompatible without the element"); goto error; } if (gst_pad_get_direction (other_peer) == GST_PAD_SRC && gst_pad_is_active (other_peer)) { gulong probe_id; probe_id = gst_pad_add_probe (other_peer, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, wait_and_drop_eos_cb, NULL, NULL); gst_pad_send_event (peer, gst_event_new_eos ()); gst_pad_remove_probe (other_peer, probe_id); } gst_element_set_locked_state (data->element, TRUE); gst_element_set_state (data->element, GST_STATE_NULL); if (!gst_bin_remove (GST_BIN (self), data->element)) { GST_WARNING_OBJECT (self, "Element removal rejected"); goto error; } gst_element_set_locked_state (data->element, FALSE); if (gst_pad_get_direction (pad) == GST_PAD_SRC) success = GST_PAD_LINK_SUCCESSFUL (gst_pad_link_full (pad, other_peer, GST_PAD_LINK_CHECK_HIERARCHY | GST_PAD_LINK_CHECK_TEMPLATE_CAPS)); else success = GST_PAD_LINK_SUCCESSFUL (gst_pad_link_full (other_peer, pad, GST_PAD_LINK_CHECK_HIERARCHY | GST_PAD_LINK_CHECK_TEMPLATE_CAPS)); gst_object_unref (other_peer); other_peer = NULL; if (!success) { GST_ERROR_OBJECT (self, "Could not re-link after the element's" " removal"); goto error; } } gst_insert_bin_change_data_complete (self, data, TRUE); gst_object_unref (peer); GST_OBJECT_LOCK (self); continue; done: if (other_peer != NULL) gst_object_unref (other_peer); if (peer != NULL) gst_object_unref (peer); break; retry: GST_OBJECT_LOCK (self); g_queue_push_head (&self->priv->change_queue, data); goto done; error: /* Handle error */ gst_insert_bin_change_data_complete (self, data, FALSE); GST_OBJECT_LOCK (self); goto done; } next: gst_insert_bin_block_pad_unlock (self); } static GstPadProbeReturn pad_blocked_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GstInsertBin *self = GST_INSERT_BIN (user_data); g_assert (GST_PAD_PROBE_INFO_TYPE (info) & (GST_PAD_PROBE_TYPE_BLOCK | GST_PAD_PROBE_TYPE_IDLE)); gst_insert_bin_do_change (self, pad); return GST_PAD_PROBE_REMOVE; } static void gst_insert_bin_add_operation (GstInsertBin * self, GstElement * element, GstInsertBinAction action, GstElement * sibling, GstInsertBinDirection direction, GstInsertBinCallback callback, gpointer user_data) { struct ChangeData *data = g_slice_new (struct ChangeData); gboolean block_pad; data->element = element; data->action = action; data->sibling = sibling; if (data->sibling) gst_object_ref (data->sibling); data->direction = direction; data->callback = callback; data->user_data = user_data; GST_OBJECT_LOCK (self); block_pad = g_queue_is_empty (&self->priv->change_queue); g_queue_push_tail (&self->priv->change_queue, data); if (block_pad) gst_insert_bin_block_pad_unlock (self); else GST_OBJECT_UNLOCK (self); } static void gst_insert_bin_add (GstInsertBin * self, GstElement * element, GstElement * sibling, GstInsertBinDirection direction, GstInsertBinCallback callback, gpointer user_data) { gst_object_ref_sink (element); if (!validate_element (self, element)) goto reject; if (sibling) { gboolean is_parent; GST_OBJECT_LOCK (sibling); is_parent = (GST_OBJECT_PARENT (sibling) == GST_OBJECT_CAST (self)); GST_OBJECT_UNLOCK (sibling); if (!is_parent) goto reject; } gst_insert_bin_add_operation (self, element, GST_INSERT_BIN_ACTION_ADD, sibling, direction, callback, user_data); return; reject: if (callback) callback (self, element, FALSE, user_data); gst_object_unref (element); } /** * gst_insert_bin_prepend: * @element: the #GstElement to add * @callback: (scope async): the callback to call when the element has been * added or not, or %NULL * @user_data: The data to pass to the callback * * This action signal adds the filter like element before any other element * in the bin. * * Same as the #GstInsertBin::prepend signal. * * Since: 1.2 */ void gst_insert_bin_prepend (GstInsertBin * self, GstElement * element, GstInsertBinCallback callback, gpointer user_data) { g_return_if_fail (GST_IS_ELEMENT (element)); gst_insert_bin_add (self, element, NULL, DIRECTION_AFTER, callback, user_data); } /** * gst_insert_bin_append: * @element: the #GstElement to add * @callback: (scope async): the callback to call when the element has been * added or not, or %NULL * @user_data: The data to pass to the callback * * This action signal adds the filter like element after any other element * in the bin. * * Same as the #GstInsertBin::append signal. * * Since: 1.2 */ void gst_insert_bin_append (GstInsertBin * self, GstElement * element, GstInsertBinCallback callback, gpointer user_data) { g_return_if_fail (GST_IS_ELEMENT (element)); gst_insert_bin_add (self, element, NULL, DIRECTION_BEFORE, callback, user_data); } /** * gst_insert_bin_insert_before: * @element: the #GstElement to add * @sibling: the #GstElement to add @element before * @callback: (scope async): the callback to call when the element has been * added or not, or %NULL * @user_data: The data to pass to the callback * * This action signal adds the filter like element before the @sibling * element in the bin. * * Same as the #GstInsertBin::insert-before signal. * * Since: 1.2 */ void gst_insert_bin_insert_before (GstInsertBin * self, GstElement * element, GstElement * sibling, GstInsertBinCallback callback, gpointer user_data) { g_return_if_fail (GST_IS_ELEMENT (element)); g_return_if_fail (GST_IS_ELEMENT (sibling)); gst_insert_bin_add (self, element, sibling, DIRECTION_BEFORE, callback, user_data); } /** * gst_insert_bin_insert_after: * @element: the #GstElement to add * @sibling: the #GstElement to add @element after * @callback: (scope async): the callback to call when the element has been * added or not, or %NULL * @user_data: The data to pass to the callback * * This action signal adds the filter like element after the @sibling * element in the bin. * * Same as the #GstInsertBin::insert-after signal. * * Since: 1.2 */ void gst_insert_bin_insert_after (GstInsertBin * self, GstElement * element, GstElement * sibling, GstInsertBinCallback callback, gpointer user_data) { g_return_if_fail (GST_IS_ELEMENT (element)); g_return_if_fail (GST_IS_ELEMENT (sibling)); gst_insert_bin_add (self, element, sibling, DIRECTION_AFTER, callback, user_data); } /** * gst_insert_bin_remove: * @element: the #GstElement to remove * @callback: (scope async): the callback to call when the element has been * removed or not, or %NULL * @user_data: The data to pass to the callback * * This action signal removed the filter like element from the bin. * * Same as the #GstInsertBin::remove signal. * * Since: 1.2 */ void gst_insert_bin_remove (GstInsertBin * self, GstElement * element, GstInsertBinCallback callback, gpointer user_data) { GstObject *parent; g_return_if_fail (GST_IS_ELEMENT (element)); parent = gst_element_get_parent (element); if (parent) { gboolean is_parent; is_parent = (parent == GST_OBJECT_CAST (self)); gst_object_unref (parent); if (!is_parent) { if (callback) callback (self, element, FALSE, user_data); return; } } else { GList *item; struct ChangeData *data = NULL; GST_OBJECT_LOCK (self); for (item = self->priv->change_queue.head; item; item = item->next) { data = item->data; if (data->element == element) { if (data->action == GST_INSERT_BIN_ACTION_ADD) g_queue_delete_link (&self->priv->change_queue, item); break; } data = NULL; } GST_OBJECT_UNLOCK (self); if (data) { gst_object_ref (element); gst_insert_bin_change_data_complete (self, data, TRUE); if (callback) callback (self, element, TRUE, user_data); gst_object_unref (element); } else { if (callback) callback (self, element, FALSE, user_data); } return; } gst_object_ref (element); gst_insert_bin_add_operation (self, element, GST_INSERT_BIN_ACTION_REMOVE, NULL, FALSE, callback, user_data); } /** * gst_insert_bin_new: * @name: (allow-none): The name of the new #GstInsertBin element (or %NULL) * * Creates a new #GstInsertBin * * Returns: The new #GstInsertBin * * Since: 1.2 */ GstElement * gst_insert_bin_new (const gchar * name) { if (name) return g_object_new (GST_TYPE_INSERT_BIN, "name", name, NULL); else return g_object_new (GST_TYPE_INSERT_BIN, NULL); }