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e70ec7b807
Original commit message from CVS: * gst/base/gstbasetransform.c: (gst_base_transform_proxy_getcaps), (gst_base_transform_event): * gst/gstpad.c: (gst_pad_accept_caps), (gst_pad_query): Implement accept_caps. Fix silly lock/unlock mismatch in base class.
3599 lines
94 KiB
C
3599 lines
94 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstpad.c: Pads for linking elements together
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "gst_private.h"
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#include "gstpad.h"
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#include "gstmarshal.h"
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#include "gstutils.h"
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#include "gstelement.h"
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#include "gstbin.h"
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#include "gstscheduler.h"
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#include "gstevent.h"
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#include "gstinfo.h"
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#include "gsterror.h"
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#include "gstvalue.h"
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GST_DEBUG_CATEGORY_STATIC (debug_dataflow);
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#define DEBUG_DATA(obj,data,notice) G_STMT_START{\
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if (!data) { \
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GST_CAT_DEBUG_OBJECT (debug_dataflow, obj, "NULL data value"); \
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} else if (GST_IS_EVENT (data)) { \
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GST_CAT_DEBUG_OBJECT (debug_dataflow, obj, "%s event %p (type %d, refcount %d)", notice, data, \
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GST_EVENT_TYPE (data), GST_DATA_REFCOUNT_VALUE (data)); \
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} else { \
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GST_CAT_LOG_OBJECT (debug_dataflow, obj, "%s buffer %p (size %u, refcount %d)", notice, data, \
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GST_BUFFER_SIZE (data), GST_BUFFER_REFCOUNT_VALUE (data)); \
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} \
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}G_STMT_END
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#define GST_CAT_DEFAULT GST_CAT_PADS
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/* realize and pad and grab the lock of the realized pad. */
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#define GST_PAD_REALIZE_AND_LOCK(pad, realpad, lost_ghostpad) \
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GST_LOCK (pad); \
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realpad = GST_PAD_REALIZE (pad); \
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if (G_UNLIKELY (realpad == NULL)) { \
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GST_UNLOCK (pad); \
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goto lost_ghostpad; \
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} \
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if (G_UNLIKELY (pad != GST_PAD_CAST (realpad))) { \
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GST_LOCK (realpad); \
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GST_UNLOCK (pad); \
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}
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enum
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{
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TEMPL_PAD_CREATED,
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/* FILL ME */
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TEMPL_LAST_SIGNAL
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};
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static GstObject *padtemplate_parent_class = NULL;
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static guint gst_pad_template_signals[TEMPL_LAST_SIGNAL] = { 0 };
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GType _gst_pad_type = 0;
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/***** Start with the base GstPad class *****/
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static void gst_pad_class_init (GstPadClass * klass);
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static void gst_pad_init (GstPad * pad);
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static void gst_pad_dispose (GObject * object);
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static void gst_pad_set_pad_template (GstPad * pad, GstPadTemplate * templ);
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#ifndef GST_DISABLE_LOADSAVE
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static xmlNodePtr gst_pad_save_thyself (GstObject * object, xmlNodePtr parent);
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#endif
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static GstObject *pad_parent_class = NULL;
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GType
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gst_pad_get_type (void)
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{
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if (!_gst_pad_type) {
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static const GTypeInfo pad_info = {
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sizeof (GstPadClass), NULL, NULL,
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(GClassInitFunc) gst_pad_class_init, NULL, NULL,
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sizeof (GstPad),
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0,
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(GInstanceInitFunc) gst_pad_init, NULL
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};
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_gst_pad_type = g_type_register_static (GST_TYPE_OBJECT, "GstPad",
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&pad_info, 0);
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GST_DEBUG_CATEGORY_INIT (debug_dataflow, "GST_DATAFLOW",
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GST_DEBUG_BOLD | GST_DEBUG_FG_GREEN, "dataflow inside pads");
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}
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return _gst_pad_type;
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}
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static void
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gst_pad_class_init (GstPadClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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pad_parent_class = g_type_class_ref (GST_TYPE_OBJECT);
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_pad_dispose);
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}
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static void
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gst_pad_init (GstPad * pad)
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{
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/* all structs are initialized to NULL by glib */
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}
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static void
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gst_pad_dispose (GObject * object)
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{
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GstPad *pad = GST_PAD (object);
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gst_pad_set_pad_template (pad, NULL);
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/* FIXME, we have links to many other things like caps
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* and the peer pad... */
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G_OBJECT_CLASS (pad_parent_class)->dispose (object);
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}
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/***** Then do the Real Pad *****/
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/* Pad signals and args */
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enum
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{
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REAL_LINKED,
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REAL_UNLINKED,
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REAL_REQUEST_LINK,
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/* FILL ME */
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REAL_LAST_SIGNAL
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};
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enum
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{
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REAL_ARG_0,
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REAL_ARG_CAPS,
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REAL_ARG_ACTIVE
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/* FILL ME */
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};
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static void gst_real_pad_class_init (GstRealPadClass * klass);
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static void gst_real_pad_init (GstRealPad * pad);
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static void gst_real_pad_dispose (GObject * object);
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static void gst_real_pad_finalize (GObject * object);
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static void gst_real_pad_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_real_pad_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstCaps *gst_real_pad_get_caps_unlocked (GstRealPad * realpad);
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GType _gst_real_pad_type = 0;
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static GstPad *real_pad_parent_class = NULL;
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static guint gst_real_pad_signals[REAL_LAST_SIGNAL] = { 0 };
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GType
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gst_real_pad_get_type (void)
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{
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if (!_gst_real_pad_type) {
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static const GTypeInfo pad_info = {
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sizeof (GstRealPadClass), NULL, NULL,
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(GClassInitFunc) gst_real_pad_class_init, NULL, NULL,
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sizeof (GstRealPad),
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0,
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(GInstanceInitFunc) gst_real_pad_init, NULL
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};
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_gst_real_pad_type = g_type_register_static (GST_TYPE_PAD, "GstRealPad",
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&pad_info, 0);
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}
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return _gst_real_pad_type;
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}
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static void
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gst_real_pad_class_init (GstRealPadClass * klass)
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{
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GObjectClass *gobject_class;
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GstObjectClass *gstobject_class;
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gobject_class = (GObjectClass *) klass;
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gstobject_class = (GstObjectClass *) klass;
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real_pad_parent_class = g_type_class_ref (GST_TYPE_PAD);
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_real_pad_dispose);
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_real_pad_finalize);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_real_pad_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_real_pad_get_property);
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gst_real_pad_signals[REAL_LINKED] =
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g_signal_new ("linked", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstRealPadClass, linked), NULL, NULL,
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gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
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gst_real_pad_signals[REAL_UNLINKED] =
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g_signal_new ("unlinked", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstRealPadClass, unlinked), NULL, NULL,
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gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
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gst_real_pad_signals[REAL_REQUEST_LINK] =
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g_signal_new ("request_link", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRealPadClass, request_link), NULL,
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NULL, gst_marshal_VOID__OBJECT, G_TYPE_NONE, 0);
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g_object_class_install_property (G_OBJECT_CLASS (klass), REAL_ARG_ACTIVE,
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g_param_spec_boolean ("active", "Active", "Whether the pad is active.",
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TRUE, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), REAL_ARG_CAPS,
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g_param_spec_boxed ("caps", "Caps", "The capabilities of the pad",
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GST_TYPE_CAPS, G_PARAM_READABLE));
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#ifndef GST_DISABLE_LOADSAVE
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gstobject_class->save_thyself = GST_DEBUG_FUNCPTR (gst_pad_save_thyself);
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#endif
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gstobject_class->path_string_separator = ".";
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}
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static void
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gst_real_pad_init (GstRealPad * pad)
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{
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pad->direction = GST_PAD_UNKNOWN;
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pad->peer = NULL;
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pad->chainfunc = NULL;
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pad->ghostpads = NULL;
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pad->caps = NULL;
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pad->linkfunc = NULL;
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pad->getcapsfunc = NULL;
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pad->eventfunc = gst_pad_event_default;
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pad->querytypefunc = gst_pad_get_query_types_default;
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pad->queryfunc = gst_pad_query_default;
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pad->intlinkfunc = gst_pad_get_internal_links_default;
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GST_FLAG_UNSET (pad, GST_PAD_ACTIVE);
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pad->preroll_lock = g_mutex_new ();
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pad->preroll_cond = g_cond_new ();
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pad->stream_rec_lock = g_new (GStaticRecMutex, 1);
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g_static_rec_mutex_init (pad->stream_rec_lock);
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pad->block_cond = g_cond_new ();
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gst_probe_dispatcher_init (&pad->probedisp);
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}
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static void
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gst_real_pad_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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g_return_if_fail (GST_IS_PAD (object));
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switch (prop_id) {
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case REAL_ARG_ACTIVE:
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g_warning ("FIXME: not useful any more!!!");
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gst_pad_set_active (GST_PAD (object), g_value_get_boolean (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_real_pad_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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g_return_if_fail (GST_IS_PAD (object));
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switch (prop_id) {
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case REAL_ARG_ACTIVE:
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g_value_set_boolean (value, GST_FLAG_IS_SET (object, GST_PAD_ACTIVE));
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break;
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case REAL_ARG_CAPS:
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g_value_set_boxed (value, GST_PAD_CAPS (GST_REAL_PAD (object)));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/* FIXME-0.9: Replace these custom functions with proper inheritance via _init
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functions and object properties. update: probably later in the cycle. */
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/**
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* gst_pad_custom_new:
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* @type: the #Gtype of the pad.
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* @name: the name of the new pad.
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* @direction: the #GstPadDirection of the pad.
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*
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* Creates a new pad with the given name and type in the given direction.
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* If name is NULL, a guaranteed unique name (across all pads)
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* will be assigned.
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* This function makes a copy of the name so you can safely free the name.
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*
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* Returns: a new #GstPad, or NULL in case of an error.
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*
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* MT safe.
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*/
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GstPad *
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gst_pad_custom_new (GType type, const gchar * name, GstPadDirection direction)
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{
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GstRealPad *pad;
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pad = g_object_new (type, NULL);
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gst_object_set_name (GST_OBJECT (pad), name);
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GST_RPAD_DIRECTION (pad) = direction;
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return GST_PAD_CAST (pad);
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}
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/**
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* gst_pad_new:
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* @name: the name of the new pad.
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* @direction: the #GstPadDirection of the pad.
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*
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* Creates a new real pad with the given name in the given direction.
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* If name is NULL, a guaranteed unique name (across all pads)
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* will be assigned.
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* This function makes a copy of the name so you can safely free the name.
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*
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* Returns: a new #GstPad, or NULL in case of an error.
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*
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* MT safe.
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*/
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GstPad *
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gst_pad_new (const gchar * name, GstPadDirection direction)
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{
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return gst_pad_custom_new (gst_real_pad_get_type (), name, direction);
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}
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/**
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* gst_pad_custom_new_from_template:
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* @type: the custom #GType of the pad.
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* @templ: the #GstPadTemplate to instantiate from.
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* @name: the name of the new pad.
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*
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* Creates a new custom pad with the given name from the given template.
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* If name is NULL, a guaranteed unique name (across all pads)
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* will be assigned.
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* This function makes a copy of the name so you can safely free the name.
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*
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* Returns: a new #GstPad, or NULL in case of an error.
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*/
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GstPad *
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gst_pad_custom_new_from_template (GType type, GstPadTemplate * templ,
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const gchar * name)
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{
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GstPad *pad;
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g_return_val_if_fail (GST_IS_PAD_TEMPLATE (templ), NULL);
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pad = gst_pad_custom_new (type, name, templ->direction);
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gst_pad_set_pad_template (pad, templ);
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return pad;
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}
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/**
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* gst_pad_new_from_template:
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* @templ: the pad template to use
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* @name: the name of the element
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*
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* Creates a new real pad with the given name from the given template.
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* If name is NULL, a guaranteed unique name (across all pads)
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* will be assigned.
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* This function makes a copy of the name so you can safely free the name.
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*
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* Returns: a new #GstPad, or NULL in case of an error.
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*/
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GstPad *
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gst_pad_new_from_template (GstPadTemplate * templ, const gchar * name)
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{
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return gst_pad_custom_new_from_template (gst_real_pad_get_type (),
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templ, name);
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}
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/**
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* gst_pad_get_direction:
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* @pad: a #GstPad to get the direction of.
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*
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* Gets the direction of the pad. The direction of the pad is
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* decided at construction time so this function does not take
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* the LOCK.
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*
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* Returns: the #GstPadDirection of the pad.
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*
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* MT safe.
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*/
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GstPadDirection
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gst_pad_get_direction (GstPad * pad)
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{
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GstPadDirection result;
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GstRealPad *realpad;
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/* PAD_UNKNOWN is a little silly but we need some sort of
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* error return value */
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g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_UNKNOWN);
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GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
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result = GST_RPAD_DIRECTION (realpad);
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GST_UNLOCK (realpad);
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return result;
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/* errors */
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lost_ghostpad:
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{
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return GST_PAD_UNKNOWN;
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}
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}
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/**
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* gst_pad_set_active:
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* @pad: the #GstPad to activate or deactivate.
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* @mode: the mode of the pad.
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*
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* Activates or deactivates the given pad in the given mode.
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*
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* For a source pad: PULL mode will call the getrange function,
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* PUSH mode will require the element to call _push() on the pad.
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*
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* For a sink pad: PULL mode will require the element to call
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* the _pull_range() function, PUSH mode will call the chain function.
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*
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* Returns: TRUE if the operation was successfull.
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*
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* MT safe.
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*/
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gboolean
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gst_pad_set_active (GstPad * pad, GstActivateMode mode)
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{
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GstRealPad *realpad;
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gboolean old;
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GstPadActivateFunction activatefunc;
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gboolean active;
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g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
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GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
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active = GST_PAD_MODE_ACTIVATE (mode);
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old = GST_PAD_IS_ACTIVE (realpad);
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/* if nothing changed, we can just exit */
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if (G_UNLIKELY (old == active))
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goto was_ok;
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/* make sure data is disallowed when going inactive */
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if (!active) {
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GST_CAT_DEBUG (GST_CAT_PADS, "de-activating pad %s:%s",
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GST_DEBUG_PAD_NAME (realpad));
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GST_FLAG_UNSET (realpad, GST_PAD_ACTIVE);
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/* unlock blocked pads so element can resume and stop */
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GST_PAD_BLOCK_SIGNAL (realpad);
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}
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|
|
|
if (active) {
|
|
if (GST_RPAD_DIRECTION (realpad) == GST_PAD_SRC) {
|
|
if (mode == GST_ACTIVATE_PULL) {
|
|
if (!realpad->getrangefunc)
|
|
goto wrong_mode;
|
|
} else {
|
|
/* we can push if driven by a chain or loop on the sink pad.
|
|
* peer pad is assumed to be active now. */
|
|
}
|
|
} else {
|
|
/* sink pads */
|
|
if (mode == GST_ACTIVATE_PULL) {
|
|
/* the src can drive us with getrange */
|
|
} else {
|
|
if (!realpad->chainfunc)
|
|
goto wrong_mode;
|
|
}
|
|
}
|
|
}
|
|
|
|
activatefunc = realpad->activatefunc;
|
|
if (activatefunc) {
|
|
gboolean result;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"calling activate function on pad %s:%s with mode %d",
|
|
GST_DEBUG_PAD_NAME (realpad), mode);
|
|
|
|
/* unlock so element can sync */
|
|
GST_UNLOCK (realpad);
|
|
result = activatefunc (GST_PAD_CAST (realpad), mode);
|
|
/* and lock again */
|
|
GST_LOCK (realpad);
|
|
if (result == FALSE)
|
|
goto activate_error;
|
|
}
|
|
|
|
/* when going to active allow data passing now */
|
|
if (active) {
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "activating pad %s:%s in mode %d",
|
|
GST_DEBUG_PAD_NAME (realpad), mode);
|
|
GST_FLAG_SET (realpad, GST_PAD_ACTIVE);
|
|
}
|
|
GST_UNLOCK (realpad);
|
|
|
|
return TRUE;
|
|
|
|
was_ok:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"pad %s:%s was active", GST_DEBUG_PAD_NAME (realpad));
|
|
GST_UNLOCK (realpad);
|
|
return TRUE;
|
|
}
|
|
/* errors */
|
|
lost_ghostpad:
|
|
{
|
|
return FALSE;
|
|
}
|
|
wrong_mode:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"pad %s:%s lacks functions to be active in mode %d",
|
|
GST_DEBUG_PAD_NAME (realpad), mode);
|
|
GST_UNLOCK (realpad);
|
|
return FALSE;
|
|
}
|
|
activate_error:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"activate function returned FALSE for pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
GST_UNLOCK (realpad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_peer_set_active:
|
|
* @pad: the #GstPad to activate or deactivate the peer of.
|
|
* @mode: the mode of the pad.
|
|
*
|
|
* Activates or deactivates the given peer of a pad. Elements
|
|
* that will perform a _pull_range() on their sinkpads need
|
|
* to call this function when the sinkpad is activated or when
|
|
* an internally linked source pad is activated in pull mode.
|
|
*
|
|
* Returns: TRUE if the operation was successfull.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_peer_set_active (GstPad * pad, GstActivateMode mode)
|
|
{
|
|
GstPad *peer;
|
|
gboolean result = FALSE;
|
|
|
|
peer = gst_pad_get_peer (pad);
|
|
if (!peer)
|
|
goto no_peer;
|
|
|
|
result = gst_pad_set_active (peer, mode);
|
|
gst_object_unref (GST_OBJECT_CAST (peer));
|
|
|
|
return result;
|
|
|
|
/* errors */
|
|
no_peer:
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_is_active:
|
|
* @pad: the #GstPad to query
|
|
*
|
|
* Query if a pad is active
|
|
*
|
|
* Returns: TRUE if the pad is active.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_is_active (GstPad * pad)
|
|
{
|
|
gboolean result = FALSE;
|
|
GstRealPad *realpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
result = GST_FLAG_IS_SET (realpad, GST_PAD_ACTIVE);
|
|
GST_UNLOCK (realpad);
|
|
|
|
return result;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_blocked_async:
|
|
* @pad: the #GstPad to block or unblock
|
|
* @blocked: boolean indicating we should block or unblock
|
|
* @callback: #GstPadBlockCallback that will be called when the
|
|
* operation succeeds.
|
|
* @user_data: user data passed to the callback
|
|
*
|
|
* Blocks or unblocks the dataflow on a pad. The provided callback
|
|
* is called when the operation succeeds. This can take a while as
|
|
* the pad can only become blocked when real dataflow is happening.
|
|
* When the pipeline is stalled, for example in PAUSED, this can
|
|
* take an indeterminate amount of time.
|
|
* You can pass NULL as the callback to make this call block. Be
|
|
* carefull with this blocking call as it might not return for
|
|
* reasons stated above.
|
|
*
|
|
* Returns: TRUE if the pad could be blocked. This function can fail
|
|
* if wrong parameters were passed or the pad was already in the
|
|
* requested state.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_set_blocked_async (GstPad * pad, gboolean blocked,
|
|
GstPadBlockCallback callback, gpointer user_data)
|
|
{
|
|
gboolean was_blocked;
|
|
GstRealPad *realpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
|
|
was_blocked = GST_RPAD_IS_BLOCKED (realpad);
|
|
|
|
if (G_UNLIKELY (was_blocked == blocked))
|
|
goto had_right_state;
|
|
|
|
if (blocked) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, realpad, "blocking pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
|
|
GST_FLAG_SET (realpad, GST_PAD_BLOCKED);
|
|
realpad->block_callback = callback;
|
|
realpad->block_data = user_data;
|
|
if (!callback) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, realpad, "waiting for block");
|
|
GST_PAD_BLOCK_WAIT (realpad);
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, realpad, "blocked");
|
|
}
|
|
} else {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, realpad, "unblocking pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
|
|
GST_FLAG_UNSET (realpad, GST_PAD_BLOCKED);
|
|
|
|
realpad->block_callback = callback;
|
|
realpad->block_data = user_data;
|
|
|
|
if (callback) {
|
|
GST_PAD_BLOCK_SIGNAL (realpad);
|
|
} else {
|
|
GST_PAD_BLOCK_SIGNAL (realpad);
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, realpad, "waiting for unblock");
|
|
GST_PAD_BLOCK_WAIT (realpad);
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, realpad, "unblocked");
|
|
}
|
|
}
|
|
GST_UNLOCK (realpad);
|
|
|
|
return TRUE;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return FALSE;
|
|
}
|
|
had_right_state:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, realpad,
|
|
"pad %s:%s was in right state", GST_DEBUG_PAD_NAME (realpad));
|
|
GST_UNLOCK (realpad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_blocked:
|
|
* @pad: the #GstPad to block or unblock
|
|
* @blocked: boolean indicating we should block or unblock
|
|
*
|
|
* Blocks or unblocks the dataflow on a pad. This function is
|
|
* a shortcut for @gst_pad_set_blocked_async() with a NULL
|
|
* callback.
|
|
*
|
|
* Returns: TRUE if the pad could be blocked. This function can fail
|
|
* wrong parameters were passed or the pad was already in the
|
|
* requested state.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_set_blocked (GstPad * pad, gboolean blocked)
|
|
{
|
|
return gst_pad_set_blocked_async (pad, blocked, NULL, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_is_blocked:
|
|
* @pad: the #GstPad to query
|
|
*
|
|
* Checks if the pad is blocked or not. This function returns the
|
|
* last requested state of the pad. It is not certain that the pad
|
|
* is actually blocked at this point.
|
|
*
|
|
* Returns: TRUE if the pad is blocked.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_is_blocked (GstPad * pad)
|
|
{
|
|
gboolean result = FALSE;
|
|
GstRealPad *realpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), result);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
result = GST_FLAG_IS_SET (realpad, GST_PAD_BLOCKED);
|
|
GST_UNLOCK (realpad);
|
|
|
|
return result;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_activate_function:
|
|
* @pad: a real sink #GstPad.
|
|
* @chain: the #GstPadActivateFunction to set.
|
|
*
|
|
* Sets the given activate function for the pad. The activate function is called to
|
|
* start or stop dataflow on a pad.
|
|
*/
|
|
void
|
|
gst_pad_set_activate_function (GstPad * pad, GstPadActivateFunction activate)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_ACTIVATEFUNC (pad) = activate;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "activatefunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (activate));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_loop_function:
|
|
* @pad: a real sink #GstPad.
|
|
* @chain: the #GstPadLoopFunction to set.
|
|
*
|
|
* Sets the given loop function for the pad. The loop function is called
|
|
* repeadedly to pull/push buffers from/to the peer pad.
|
|
*/
|
|
void
|
|
gst_pad_set_loop_function (GstPad * pad, GstPadLoopFunction loop)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_LOOPFUNC (pad) = loop;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "loopfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (loop));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_chain_function:
|
|
* @pad: a real sink #GstPad.
|
|
* @chain: the #GstPadChainFunction to set.
|
|
*
|
|
* Sets the given chain function for the pad. The chain function is called to
|
|
* process a #GstBuffer input buffer.
|
|
*/
|
|
void
|
|
gst_pad_set_chain_function (GstPad * pad, GstPadChainFunction chain)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
g_return_if_fail (GST_RPAD_DIRECTION (pad) == GST_PAD_SINK);
|
|
|
|
GST_RPAD_CHAINFUNC (pad) = chain;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "chainfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (chain));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_getrange_function:
|
|
* @pad: a real source #GstPad.
|
|
* @get: the #GstPadGetRangeFunction to set.
|
|
*
|
|
* Sets the given getrange function for the pad. The getrange function is called to
|
|
* produce a new #GstBuffer to start the processing pipeline. Getrange functions cannot
|
|
* return %NULL.
|
|
*/
|
|
void
|
|
gst_pad_set_getrange_function (GstPad * pad, GstPadGetRangeFunction get)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
g_return_if_fail (GST_RPAD_DIRECTION (pad) == GST_PAD_SRC);
|
|
|
|
GST_RPAD_GETRANGEFUNC (pad) = get;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "getrangefunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (get));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_checkgetrange_function:
|
|
* @pad: a real source #GstPad.
|
|
* @check: the #GstPadCheckGetRangeFunction to set.
|
|
*
|
|
* Sets the given checkgetrange function for the pad. Implement this function on
|
|
* a pad if you dynamically support getrange based scheduling on the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_checkgetrange_function (GstPad * pad,
|
|
GstPadCheckGetRangeFunction check)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
g_return_if_fail (GST_RPAD_DIRECTION (pad) == GST_PAD_SRC);
|
|
|
|
GST_RPAD_CHECKGETRANGEFUNC (pad) = check;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "checkgetrangefunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (check));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_event_function:
|
|
* @pad: a real source #GstPad.
|
|
* @event: the #GstPadEventFunction to set.
|
|
*
|
|
* Sets the given event handler for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_event_function (GstPad * pad, GstPadEventFunction event)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_EVENTFUNC (pad) = event;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "eventfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (event));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_query_function:
|
|
* @pad: a real #GstPad of either direction.
|
|
* @query: the #GstPadQueryFunction to set.
|
|
*
|
|
* Set the given query function for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_query_function (GstPad * pad, GstPadQueryFunction query)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_QUERYFUNC (pad) = query;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "queryfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (query));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_query_type_function:
|
|
* @pad: a real #GstPad of either direction.
|
|
* @type_func: the #GstPadQueryTypeFunction to set.
|
|
*
|
|
* Set the given query type function for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_query_type_function (GstPad * pad,
|
|
GstPadQueryTypeFunction type_func)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_QUERYTYPEFUNC (pad) = type_func;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "querytypefunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (type_func));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_query_types:
|
|
* @pad: a #GstPad.
|
|
*
|
|
* Get an array of supported queries that can be performed
|
|
* on this pad.
|
|
*
|
|
* Returns: a zero-terminated array of #GstQueryType.
|
|
*/
|
|
const GstQueryType *
|
|
gst_pad_get_query_types (GstPad * pad)
|
|
{
|
|
GstRealPad *rpad;
|
|
GstPadQueryTypeFunction func;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
g_return_val_if_fail (rpad, NULL);
|
|
|
|
if (G_UNLIKELY ((func = GST_RPAD_QUERYTYPEFUNC (rpad)) == NULL))
|
|
goto no_func;
|
|
|
|
return func (GST_PAD (rpad));
|
|
|
|
no_func:
|
|
{
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_get_query_types_dispatcher (GstPad * pad, const GstQueryType ** data)
|
|
{
|
|
*data = gst_pad_get_query_types (pad);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_query_types_default:
|
|
* @pad: a #GstPad.
|
|
*
|
|
* Invoke the default dispatcher for the query types on
|
|
* the pad.
|
|
*
|
|
* Returns: an zero-terminated array of #GstQueryType, or NULL if none of the
|
|
* internally-linked pads has a query types function.
|
|
*/
|
|
const GstQueryType *
|
|
gst_pad_get_query_types_default (GstPad * pad)
|
|
{
|
|
GstQueryType *result = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
gst_pad_dispatcher (pad, (GstPadDispatcherFunction)
|
|
gst_pad_get_query_types_dispatcher, &result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_internal_link_function:
|
|
* @pad: a real #GstPad of either direction.
|
|
* @intlink: the #GstPadIntLinkFunction to set.
|
|
*
|
|
* Sets the given internal link function for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_internal_link_function (GstPad * pad, GstPadIntLinkFunction intlink)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_INTLINKFUNC (pad) = intlink;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "internal link for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (intlink));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_link_function:
|
|
* @pad: a real #GstPad.
|
|
* @link: the #GstPadLinkFunction to set.
|
|
*
|
|
* Sets the given link function for the pad. It will be called when the pad is
|
|
* linked or relinked with caps. The caps passed to the link function is
|
|
* the caps for the connnection. It can contain a non fixed caps.
|
|
*
|
|
* The return value GST_PAD_LINK_OK should be used when the connection can be
|
|
* made.
|
|
*
|
|
* The return value GST_PAD_LINK_REFUSED should be used when the connection
|
|
* cannot be made for some reason.
|
|
*/
|
|
void
|
|
gst_pad_set_link_function (GstPad * pad, GstPadLinkFunction link)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_LINKFUNC (pad) = link;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "linkfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (link));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_unlink_function:
|
|
* @pad: a real #GstPad.
|
|
* @unlink: the #GstPadUnlinkFunction to set.
|
|
*
|
|
* Sets the given unlink function for the pad. It will be called
|
|
* when the pad is unlinked.
|
|
*/
|
|
void
|
|
gst_pad_set_unlink_function (GstPad * pad, GstPadUnlinkFunction unlink)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_UNLINKFUNC (pad) = unlink;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "unlinkfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (unlink));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_getcaps_function:
|
|
* @pad: a real #GstPad.
|
|
* @getcaps: the #GstPadGetCapsFunction to set.
|
|
*
|
|
* Sets the given getcaps function for the pad. @getcaps should return the
|
|
* allowable caps for a pad in the context of the element's state, its link to
|
|
* other elements, and the devices or files it has opened. These caps must be a
|
|
* subset of the pad template caps. In the NULL state with no links, @getcaps
|
|
* should ideally return the same caps as the pad template. In rare
|
|
* circumstances, an object property can affect the caps returned by @getcaps,
|
|
* but this is discouraged.
|
|
*
|
|
* You do not need to call this function if @pad's allowed caps are always the
|
|
* same as the pad template caps. This can only be true if the padtemplate
|
|
* has fixed simple caps.
|
|
*
|
|
* For most filters, the caps returned by @getcaps is directly affected by the
|
|
* allowed caps on other pads. For demuxers and decoders, the caps returned by
|
|
* the srcpad's getcaps function is directly related to the stream data. Again,
|
|
* @getcaps should return the most specific caps it reasonably can, since this
|
|
* helps with autoplugging.
|
|
*
|
|
* Note that the return value from @getcaps is owned by the caller, so the caller
|
|
* should unref the caps after usage.
|
|
*/
|
|
void
|
|
gst_pad_set_getcaps_function (GstPad * pad, GstPadGetCapsFunction getcaps)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_GETCAPSFUNC (pad) = getcaps;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "getcapsfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (getcaps));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_acceptcaps_function:
|
|
* @pad: a real #GstPad.
|
|
* @acceptcaps: the #GstPadAcceptCapsFunction to set.
|
|
*
|
|
* Sets the given acceptcaps function for the pad. The acceptcaps function
|
|
* will be called to check if the pad can accept the given caps.
|
|
*/
|
|
void
|
|
gst_pad_set_acceptcaps_function (GstPad * pad,
|
|
GstPadAcceptCapsFunction acceptcaps)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_ACCEPTCAPSFUNC (pad) = acceptcaps;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "acceptcapsfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (acceptcaps));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_fixatecaps_function:
|
|
* @pad: a real #GstPad.
|
|
* @fixatecaps: the #GstPadFixateCapsFunction to set.
|
|
*
|
|
* Sets the given fixatecaps function for the pad. The fixatecaps function
|
|
* will be called whenever the default values for a GstCaps needs to be
|
|
* filled in.
|
|
*/
|
|
void
|
|
gst_pad_set_fixatecaps_function (GstPad * pad,
|
|
GstPadFixateCapsFunction fixatecaps)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_FIXATECAPSFUNC (pad) = fixatecaps;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "fixatecapsfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (fixatecaps));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_setcaps_function:
|
|
* @pad: a real #GstPad.
|
|
* @setcaps: the #GstPadSetCapsFunction to set.
|
|
*
|
|
* Sets the given setcaps function for the pad. The setcaps function
|
|
* will be called whenever a buffer with a new media type is pushed or
|
|
* pulled from the pad. The pad/element needs to update it's internal
|
|
* structures to process the new media type. If this new type is not
|
|
* acceptable, the setcaps function should return FALSE.
|
|
*/
|
|
void
|
|
gst_pad_set_setcaps_function (GstPad * pad, GstPadSetCapsFunction setcaps)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_SETCAPSFUNC (pad) = setcaps;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "setcapsfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (setcaps));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_bufferalloc_function:
|
|
* @pad: a real sink #GstPad.
|
|
* @bufalloc: the #GstPadBufferAllocFunction to set.
|
|
*
|
|
* Sets the given bufferalloc function for the pad. Note that the
|
|
* bufferalloc function can only be set on sinkpads.
|
|
*/
|
|
void
|
|
gst_pad_set_bufferalloc_function (GstPad * pad,
|
|
GstPadBufferAllocFunction bufalloc)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
g_return_if_fail (GST_PAD_IS_SINK (pad));
|
|
|
|
GST_RPAD_BUFFERALLOCFUNC (pad) = bufalloc;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "bufferallocfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (bufalloc));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_unlink:
|
|
* @srcpad: the source #GstPad to unlink.
|
|
* @sinkpad: the sink #GstPad to unlink.
|
|
*
|
|
* Unlinks the source pad from the sink pad. Will emit the "unlinked" signal on
|
|
* both pads.
|
|
*
|
|
* Returns: TRUE if the pads were unlinked. This function returns FALSE if
|
|
* the pads were not linked together.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_unlink (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
|
|
|
|
GST_CAT_INFO (GST_CAT_ELEMENT_PADS, "unlinking %s:%s(%p) and %s:%s(%p)",
|
|
GST_DEBUG_PAD_NAME (srcpad), srcpad,
|
|
GST_DEBUG_PAD_NAME (sinkpad), sinkpad);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (srcpad, realsrc, lost_src_ghostpad);
|
|
|
|
if (G_UNLIKELY (GST_RPAD_DIRECTION (realsrc) != GST_PAD_SRC))
|
|
goto not_srcpad;
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (sinkpad, realsink, lost_sink_ghostpad);
|
|
|
|
if (G_UNLIKELY (GST_RPAD_DIRECTION (realsink) != GST_PAD_SINK))
|
|
goto not_sinkpad;
|
|
|
|
if (G_UNLIKELY (GST_RPAD_PEER (realsrc) != realsink))
|
|
goto not_linked_together;
|
|
|
|
if (GST_RPAD_UNLINKFUNC (realsrc)) {
|
|
GST_RPAD_UNLINKFUNC (realsrc) (GST_PAD (realsrc));
|
|
}
|
|
if (GST_RPAD_UNLINKFUNC (realsink)) {
|
|
GST_RPAD_UNLINKFUNC (realsink) (GST_PAD (realsink));
|
|
}
|
|
|
|
/* first clear peers */
|
|
GST_RPAD_PEER (realsrc) = NULL;
|
|
GST_RPAD_PEER (realsink) = NULL;
|
|
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
|
|
/* fire off a signal to each of the pads telling them
|
|
* that they've been unlinked */
|
|
g_signal_emit (G_OBJECT (realsrc), gst_real_pad_signals[REAL_UNLINKED],
|
|
0, realsink);
|
|
g_signal_emit (G_OBJECT (realsink), gst_real_pad_signals[REAL_UNLINKED],
|
|
0, realsrc);
|
|
|
|
GST_CAT_INFO (GST_CAT_ELEMENT_PADS, "unlinked %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
|
|
return TRUE;
|
|
|
|
lost_src_ghostpad:
|
|
{
|
|
return FALSE;
|
|
}
|
|
not_srcpad:
|
|
{
|
|
g_critical ("pad %s is not a source pad", GST_PAD_NAME (realsrc));
|
|
GST_UNLOCK (realsrc);
|
|
return FALSE;
|
|
}
|
|
lost_sink_ghostpad:
|
|
{
|
|
GST_UNLOCK (realsrc);
|
|
return FALSE;
|
|
}
|
|
not_sinkpad:
|
|
{
|
|
g_critical ("pad %s is not a sink pad", GST_PAD_NAME (realsink));
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
return FALSE;
|
|
}
|
|
not_linked_together:
|
|
{
|
|
/* we do not emit a warning in this case because unlinking cannot
|
|
* be made MT safe.*/
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_is_linked:
|
|
* @pad: pad to check
|
|
*
|
|
* Checks if a @pad is linked to another pad or not.
|
|
*
|
|
* Returns: TRUE if the pad is linked, FALSE otherwise.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_is_linked (GstPad * pad)
|
|
{
|
|
gboolean result;
|
|
GstRealPad *realpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
result = (GST_PAD_PEER (realpad) != NULL);
|
|
GST_UNLOCK (realpad);
|
|
return result;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_link_check_compatible_unlocked (GstRealPad * src, GstRealPad * sink)
|
|
{
|
|
GstCaps *srccaps;
|
|
GstCaps *sinkcaps;
|
|
|
|
srccaps = gst_real_pad_get_caps_unlocked (src);
|
|
sinkcaps = gst_real_pad_get_caps_unlocked (sink);
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "got caps %p and %p", srccaps, sinkcaps);
|
|
|
|
if (srccaps && sinkcaps) {
|
|
GstCaps *icaps;
|
|
|
|
icaps = gst_caps_intersect (srccaps, sinkcaps);
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"intersection caps %p %" GST_PTR_FORMAT, icaps, icaps);
|
|
|
|
if (!icaps || gst_caps_is_empty (icaps))
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* FIXME leftover from an attempt at refactoring... */
|
|
static GstPadLinkReturn
|
|
gst_pad_link_prepare (GstPad * srcpad, GstPad * sinkpad,
|
|
GstRealPad ** outrealsrc, GstRealPad ** outrealsink)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
|
|
/* generic checks */
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), GST_PAD_LINK_REFUSED);
|
|
|
|
GST_CAT_INFO (GST_CAT_PADS, "trying to link %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
|
|
/* now we need to deal with the real/ghost stuff */
|
|
GST_PAD_REALIZE_AND_LOCK (srcpad, realsrc, lost_src_ghostpad);
|
|
|
|
if (G_UNLIKELY (GST_RPAD_DIRECTION (realsrc) != GST_PAD_SRC))
|
|
goto not_srcpad;
|
|
|
|
if (G_UNLIKELY (GST_RPAD_PEER (realsrc) != NULL))
|
|
goto src_was_linked;
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (sinkpad, realsink, lost_sink_ghostpad);
|
|
|
|
if (G_UNLIKELY (GST_RPAD_DIRECTION (realsink) != GST_PAD_SINK))
|
|
goto not_sinkpad;
|
|
|
|
if (G_UNLIKELY (GST_RPAD_PEER (realsink) != NULL))
|
|
goto sink_was_linked;
|
|
|
|
if ((GST_PAD (realsrc) != srcpad) || (GST_PAD (realsink) != sinkpad)) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "*actually* linking %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
}
|
|
*outrealsrc = realsrc;
|
|
*outrealsink = realsink;
|
|
|
|
/* check pad caps for non-empty intersection */
|
|
if (!gst_pad_link_check_compatible_unlocked (realsrc, realsink)) {
|
|
goto no_format;
|
|
}
|
|
|
|
/* FIXME check pad scheduling for non-empty intersection */
|
|
|
|
return GST_PAD_LINK_OK;
|
|
|
|
lost_src_ghostpad:
|
|
{
|
|
return GST_PAD_LINK_REFUSED;
|
|
}
|
|
not_srcpad:
|
|
{
|
|
g_critical ("pad %s is not a source pad", GST_PAD_NAME (realsrc));
|
|
GST_UNLOCK (realsrc);
|
|
return GST_PAD_LINK_WRONG_DIRECTION;
|
|
}
|
|
src_was_linked:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "src %s:%s was linked",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
/* we do not emit a warning in this case because unlinking cannot
|
|
* be made MT safe.*/
|
|
GST_UNLOCK (realsrc);
|
|
return GST_PAD_LINK_WAS_LINKED;
|
|
}
|
|
lost_sink_ghostpad:
|
|
{
|
|
GST_DEBUG ("lost sink ghostpad");
|
|
GST_UNLOCK (realsrc);
|
|
return GST_PAD_LINK_REFUSED;
|
|
}
|
|
not_sinkpad:
|
|
{
|
|
g_critical ("pad %s is not a sink pad", GST_PAD_NAME (realsink));
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
return GST_PAD_LINK_WRONG_DIRECTION;
|
|
}
|
|
sink_was_linked:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "sink %s:%s was linked",
|
|
GST_DEBUG_PAD_NAME (realsink));
|
|
/* we do not emit a warning in this case because unlinking cannot
|
|
* be made MT safe.*/
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
return GST_PAD_LINK_WAS_LINKED;
|
|
}
|
|
no_format:
|
|
{
|
|
GST_CAT_INFO (GST_CAT_PADS, "caps are incompatible");
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
return GST_PAD_LINK_NOFORMAT;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_link:
|
|
* @srcpad: the source #GstPad to link.
|
|
* @sinkpad: the sink #GstPad to link.
|
|
*
|
|
* Links the source pad and the sink pad.
|
|
*
|
|
* Returns: A result code indicating if the connection worked or
|
|
* what went wrong.
|
|
*
|
|
* MT Safe.
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_link (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
GstPadLinkReturn result;
|
|
|
|
result = gst_pad_link_prepare (srcpad, sinkpad, &realsrc, &realsink);
|
|
|
|
if (result != GST_PAD_LINK_OK)
|
|
goto prepare_failed;
|
|
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
|
|
/* FIXME released the locks here, concurrent thread might link
|
|
* something else. */
|
|
if (GST_RPAD_LINKFUNC (realsrc)) {
|
|
/* this one will call the peer link function */
|
|
result =
|
|
GST_RPAD_LINKFUNC (realsrc) (GST_PAD (realsrc), GST_PAD (realsink));
|
|
} else if (GST_RPAD_LINKFUNC (realsink)) {
|
|
/* if no source link function, we need to call the sink link
|
|
* function ourselves. */
|
|
result =
|
|
GST_RPAD_LINKFUNC (realsink) (GST_PAD (realsink), GST_PAD (realsrc));
|
|
} else {
|
|
result = GST_PAD_LINK_OK;
|
|
}
|
|
|
|
GST_LOCK (realsrc);
|
|
GST_LOCK (realsink);
|
|
if (result == GST_PAD_LINK_OK) {
|
|
GST_RPAD_PEER (realsrc) = GST_REAL_PAD (realsink);
|
|
GST_RPAD_PEER (realsink) = GST_REAL_PAD (realsrc);
|
|
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
|
|
/* fire off a signal to each of the pads telling them
|
|
* that they've been linked */
|
|
g_signal_emit (G_OBJECT (realsrc), gst_real_pad_signals[REAL_LINKED],
|
|
0, realsink);
|
|
g_signal_emit (G_OBJECT (realsink), gst_real_pad_signals[REAL_LINKED],
|
|
0, realsrc);
|
|
|
|
GST_CAT_INFO (GST_CAT_PADS, "linked %s:%s and %s:%s, successful",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
} else {
|
|
GST_CAT_INFO (GST_CAT_PADS, "link between %s:%s and %s:%s failed",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
|
|
GST_UNLOCK (realsink);
|
|
GST_UNLOCK (realsrc);
|
|
}
|
|
return result;
|
|
|
|
prepare_failed:
|
|
{
|
|
return result;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_pad_set_pad_template (GstPad * pad, GstPadTemplate * templ)
|
|
{
|
|
/* this function would need checks if it weren't static */
|
|
|
|
GST_LOCK (pad);
|
|
gst_object_replace ((GstObject **) & pad->padtemplate, (GstObject *) templ);
|
|
GST_UNLOCK (pad);
|
|
|
|
if (templ) {
|
|
gst_object_sink (GST_OBJECT (templ));
|
|
g_signal_emit (G_OBJECT (templ),
|
|
gst_pad_template_signals[TEMPL_PAD_CREATED], 0, pad);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_pad_template:
|
|
* @pad: a #GstPad.
|
|
*
|
|
* Gets the template for @pad.
|
|
*
|
|
* Returns: the #GstPadTemplate from which this pad was instantiated, or %NULL
|
|
* if this pad has no template.
|
|
*
|
|
* FIXME: currently returns an unrefcounted padtemplate.
|
|
*/
|
|
GstPadTemplate *
|
|
gst_pad_get_pad_template (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
return GST_PAD_PAD_TEMPLATE (pad);
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_pad_get_real_parent:
|
|
* @pad: a #GstPad to get the real parent of.
|
|
*
|
|
* Gets the real parent object of this pad. If the pad
|
|
* is a ghost pad, the actual owner of the real pad is
|
|
* returned, as opposed to #gst_pad_get_parent().
|
|
* Unref the object after use.
|
|
*
|
|
* Returns: the parent #GstElement. unref after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstElement *
|
|
gst_pad_get_real_parent (GstPad * pad)
|
|
{
|
|
GstRealPad *realpad;
|
|
GstElement *element;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
element = GST_PAD_PARENT (realpad);
|
|
if (element)
|
|
gst_object_ref (GST_OBJECT (element));
|
|
GST_UNLOCK (realpad);
|
|
|
|
return element;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* FIXME not MT safe */
|
|
static void
|
|
gst_pad_add_ghost_pad (GstPad * pad, GstPad * ghostpad)
|
|
{
|
|
GstRealPad *realpad;
|
|
|
|
/* if we're ghosting a ghost pad, drill down to find the real pad */
|
|
realpad = (GstRealPad *) pad;
|
|
while (GST_IS_GHOST_PAD (realpad))
|
|
realpad = GST_GPAD_REALPAD (realpad);
|
|
g_return_if_fail (GST_IS_REAL_PAD (realpad));
|
|
|
|
/* will ref the pad template */
|
|
GST_GPAD_REALPAD (ghostpad) = realpad;
|
|
realpad->ghostpads = g_list_prepend (realpad->ghostpads, ghostpad);
|
|
gst_pad_set_pad_template (GST_PAD (ghostpad), GST_PAD_PAD_TEMPLATE (pad));
|
|
}
|
|
|
|
static void
|
|
gst_pad_remove_ghost_pad (GstPad * pad, GstPad * ghostpad)
|
|
{
|
|
GstRealPad *realpad;
|
|
|
|
realpad = GST_PAD_REALIZE (pad);
|
|
g_return_if_fail (GST_GPAD_REALPAD (ghostpad) == realpad);
|
|
|
|
gst_pad_set_pad_template (GST_PAD (ghostpad), NULL);
|
|
realpad->ghostpads = g_list_remove (realpad->ghostpads, ghostpad);
|
|
GST_GPAD_REALPAD (ghostpad) = NULL;
|
|
}
|
|
|
|
/* should be called with the pad LOCK held */
|
|
static GstCaps *
|
|
gst_real_pad_get_caps_unlocked (GstRealPad * realpad)
|
|
{
|
|
GstCaps *result = NULL;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "get pad caps of %s:%s (%p)",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
|
|
if (GST_RPAD_GETCAPSFUNC (realpad)) {
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "dispatching to pad getcaps function");
|
|
|
|
GST_FLAG_SET (realpad, GST_PAD_IN_GETCAPS);
|
|
GST_UNLOCK (realpad);
|
|
result = GST_RPAD_GETCAPSFUNC (realpad) (GST_PAD (realpad));
|
|
GST_LOCK (realpad);
|
|
GST_FLAG_UNSET (realpad, GST_PAD_IN_GETCAPS);
|
|
|
|
if (result == NULL) {
|
|
g_critical ("pad %s:%s returned NULL caps from getcaps function",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
} else {
|
|
#ifndef G_DISABLE_ASSERT
|
|
/* check that the returned caps are a real subset of the template caps */
|
|
if (GST_PAD_PAD_TEMPLATE (realpad)) {
|
|
const GstCaps *templ_caps =
|
|
GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (realpad));
|
|
if (!gst_caps_is_subset (result, templ_caps)) {
|
|
GstCaps *temp;
|
|
|
|
GST_CAT_ERROR_OBJECT (GST_CAT_CAPS, realpad,
|
|
"pad returned caps %" GST_PTR_FORMAT
|
|
" which are not a real subset of its template caps %"
|
|
GST_PTR_FORMAT, result, templ_caps);
|
|
g_warning
|
|
("pad %s:%s returned caps that are not a real subset of its template caps",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
temp = gst_caps_intersect (templ_caps, result);
|
|
gst_caps_unref (result);
|
|
result = temp;
|
|
}
|
|
}
|
|
#endif
|
|
goto done;
|
|
}
|
|
}
|
|
if (GST_PAD_PAD_TEMPLATE (realpad)) {
|
|
GstPadTemplate *templ = GST_PAD_PAD_TEMPLATE (realpad);
|
|
|
|
result = GST_PAD_TEMPLATE_CAPS (templ);
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"using pad template %p with caps %p %" GST_PTR_FORMAT, templ, result,
|
|
result);
|
|
|
|
result = gst_caps_ref (result);
|
|
goto done;
|
|
}
|
|
if (GST_RPAD_CAPS (realpad)) {
|
|
result = GST_RPAD_CAPS (realpad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"using pad caps %p %" GST_PTR_FORMAT, result, result);
|
|
|
|
result = gst_caps_ref (result);
|
|
goto done;
|
|
}
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "pad has no caps");
|
|
result = gst_caps_new_empty ();
|
|
|
|
done:
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_caps:
|
|
* @pad: a #GstPad to get the capabilities of.
|
|
*
|
|
* Gets the capabilities of this pad.
|
|
*
|
|
* Returns: the #GstCaps of this pad. This function returns a new caps, so use
|
|
* gst_caps_unref to get rid of it.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_get_caps (GstPad * pad)
|
|
{
|
|
GstRealPad *realpad;
|
|
GstCaps *result = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
/* now we need to deal with the real/ghost stuff */
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "get pad caps of %s:%s (%p)",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
|
|
if (G_UNLIKELY (GST_RPAD_IS_IN_GETCAPS (realpad)))
|
|
goto was_dispatching;
|
|
|
|
result = gst_real_pad_get_caps_unlocked (realpad);
|
|
GST_UNLOCK (realpad);
|
|
|
|
return result;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return NULL;
|
|
}
|
|
was_dispatching:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"pad %s:%s is already dispatching!", GST_DEBUG_PAD_NAME (realpad));
|
|
g_warning ("pad %s:%s recursively called getcaps!",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
GST_UNLOCK (realpad);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_peer_get_caps:
|
|
* @pad: a #GstPad to get the peer capabilities of.
|
|
*
|
|
* Gets the capabilities of the peer connected to this pad.
|
|
*
|
|
* Returns: the #GstCaps of the peer pad. This function returns a new caps, so use
|
|
* gst_caps_unref to get rid of it. this function returns NULL if there is no
|
|
* peer pad or when this function is called recursively from a getcaps function.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_peer_get_caps (GstPad * pad)
|
|
{
|
|
GstRealPad *realpad, *peerpad;
|
|
GstCaps *result = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
/* now we need to deal with the real/ghost stuff */
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "get peer caps of %s:%s (%p)",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
|
|
peerpad = GST_RPAD_PEER (realpad);
|
|
if (G_UNLIKELY (peerpad == NULL))
|
|
goto no_peer;
|
|
|
|
if (G_UNLIKELY (GST_RPAD_IS_IN_GETCAPS (peerpad)))
|
|
goto was_dispatching;
|
|
|
|
gst_object_ref (GST_OBJECT (peerpad));
|
|
GST_UNLOCK (realpad);
|
|
|
|
result = gst_pad_get_caps (GST_PAD_CAST (peerpad));
|
|
|
|
gst_object_unref (GST_OBJECT (peerpad));
|
|
|
|
return result;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return NULL;
|
|
}
|
|
no_peer:
|
|
{
|
|
GST_UNLOCK (realpad);
|
|
return NULL;
|
|
}
|
|
was_dispatching:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"pad %s:%s is already dispatching!", GST_DEBUG_PAD_NAME (realpad));
|
|
g_warning ("pad %s:%s recursively called getcaps!",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
GST_UNLOCK (realpad);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_fixate_caps:
|
|
* @pad: a #GstPad to fixate
|
|
*
|
|
* Fixate a caps on the given pad.
|
|
*
|
|
* Returns: a fixated #GstCaps.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_fixate_caps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
/* FIXME, implement me, call the fixate function for the pad */
|
|
return caps;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_accept_caps:
|
|
* @pad: a #GstPad to check
|
|
*
|
|
* Check if the given pad accepts the caps.
|
|
*
|
|
* Returns: TRUE if the pad can accept the caps.
|
|
*/
|
|
gboolean
|
|
gst_pad_accept_caps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstRealPad *realpad;
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
/* now we need to deal with the real/ghost stuff */
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "pad accept caps of %s:%s (%p)",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
|
|
if (GST_RPAD_ACCEPTCAPSFUNC (pad)) {
|
|
/* we can call the function */
|
|
result = GST_RPAD_ACCEPTCAPSFUNC (realpad) (pad, caps);
|
|
} else {
|
|
/* else see get the caps and see if it intersects to something
|
|
* not empty */
|
|
GstCaps *intersect;
|
|
GstCaps *allowed;
|
|
|
|
allowed = gst_real_pad_get_caps_unlocked (realpad);
|
|
intersect = gst_caps_intersect (allowed, caps);
|
|
if (gst_caps_is_empty (intersect))
|
|
result = FALSE;
|
|
else
|
|
result = TRUE;
|
|
}
|
|
GST_UNLOCK (realpad);
|
|
|
|
return result;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_peer_accept_caps:
|
|
* @pad: a #GstPad to check
|
|
*
|
|
* Check if the given pad accepts the caps.
|
|
*
|
|
* Returns: TRUE if the pad can accept the caps.
|
|
*/
|
|
gboolean
|
|
gst_pad_peer_accept_caps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstRealPad *realpad, *peerpad;
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
/* now we need to deal with the real/ghost stuff */
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "peer accept caps of %s:%s (%p)",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
|
|
peerpad = GST_RPAD_PEER (realpad);
|
|
if (G_UNLIKELY (peerpad == NULL))
|
|
goto no_peer;
|
|
|
|
result = gst_pad_accept_caps (GST_PAD_CAST (peerpad), caps);
|
|
GST_UNLOCK (realpad);
|
|
|
|
return result;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return FALSE;
|
|
}
|
|
no_peer:
|
|
{
|
|
GST_UNLOCK (realpad);
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_caps:
|
|
* @pad: a #GstPad to set the capabilities of.
|
|
* @caps: a #GstCaps to set.
|
|
*
|
|
* Sets the capabilities of this pad. The caps must be fixed. Any previous
|
|
* caps on the pad will be unreffed. This function refs the caps so you should
|
|
* unref if as soon as you don't need it anymore.
|
|
* It is possible to set NULL caps, which will make the pad unnegotiated
|
|
* again.
|
|
*
|
|
* Returns: TRUE if the caps could be set. FALSE if the caps were not fixed
|
|
* or bad parameters were provided to this function.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_set_caps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstPadSetCapsFunction setcaps;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), FALSE);
|
|
|
|
GST_LOCK (pad);
|
|
setcaps = GST_RPAD_SETCAPSFUNC (pad);
|
|
|
|
/* call setcaps function to configure the pad */
|
|
if (setcaps != NULL) {
|
|
if (!GST_RPAD_IS_IN_SETCAPS (pad)) {
|
|
GST_FLAG_SET (pad, GST_PAD_IN_SETCAPS);
|
|
GST_UNLOCK (pad);
|
|
if (!setcaps (pad, caps))
|
|
goto could_not_set;
|
|
GST_LOCK (pad);
|
|
} else {
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "pad %s:%s was dispatching",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
}
|
|
}
|
|
|
|
if (GST_RPAD_CAPS (pad))
|
|
gst_caps_unref (GST_RPAD_CAPS (pad));
|
|
|
|
if (caps)
|
|
caps = gst_caps_ref (caps);
|
|
|
|
gst_caps_replace (&GST_PAD_CAPS (pad), caps);
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "%s:%s caps %" GST_PTR_FORMAT,
|
|
GST_DEBUG_PAD_NAME (pad), caps);
|
|
GST_UNLOCK (pad);
|
|
|
|
g_object_notify (G_OBJECT (pad), "caps");
|
|
|
|
return TRUE;
|
|
|
|
could_not_set:
|
|
{
|
|
GST_LOCK (pad);
|
|
GST_FLAG_UNSET (pad, GST_PAD_IN_SETCAPS);
|
|
GST_UNLOCK (pad);
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "caps %" GST_PTR_FORMAT " could not be set",
|
|
caps);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_configure_sink (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstPadAcceptCapsFunction acceptcaps;
|
|
GstPadSetCapsFunction setcaps;
|
|
|
|
acceptcaps = GST_RPAD_ACCEPTCAPSFUNC (pad);
|
|
setcaps = GST_RPAD_SETCAPSFUNC (pad);
|
|
|
|
/* See if pad accepts the caps, by calling acceptcaps, only
|
|
* needed if no setcaps function */
|
|
if (setcaps == NULL && acceptcaps != NULL) {
|
|
if (!acceptcaps (pad, caps))
|
|
goto not_accepted;
|
|
}
|
|
/* set caps on pad if call succeeds */
|
|
gst_pad_set_caps (pad, caps);
|
|
/* no need to unref the caps here, set_caps takes a ref and
|
|
* our ref goes away when we leave this function. */
|
|
|
|
return TRUE;
|
|
|
|
not_accepted:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "caps %" GST_PTR_FORMAT " not accepted", caps);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_configure_src (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstPadAcceptCapsFunction acceptcaps;
|
|
GstPadSetCapsFunction setcaps;
|
|
|
|
acceptcaps = GST_RPAD_ACCEPTCAPSFUNC (pad);
|
|
setcaps = GST_RPAD_SETCAPSFUNC (pad);
|
|
|
|
/* See if pad accepts the caps, by calling acceptcaps, only
|
|
* needed if no setcaps function */
|
|
if (setcaps == NULL && acceptcaps != NULL) {
|
|
if (!acceptcaps (pad, caps))
|
|
goto not_accepted;
|
|
}
|
|
/* set caps on pad if call succeeds */
|
|
gst_pad_set_caps (pad, caps);
|
|
/* no need to unref the caps here, set_caps takes a ref and
|
|
* our ref goes away when we leave this function. */
|
|
|
|
return TRUE;
|
|
|
|
not_accepted:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "caps %" GST_PTR_FORMAT " not accepted", caps);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_pad_template_caps:
|
|
* @pad: a #GstPad to get the template capabilities from.
|
|
*
|
|
* Gets the capabilities for @pad's template.
|
|
*
|
|
* Returns: the #GstCaps of this pad template. If you intend to keep a reference
|
|
* on the caps, make a copy (see gst_caps_copy ()).
|
|
*/
|
|
const GstCaps *
|
|
gst_pad_get_pad_template_caps (GstPad * pad)
|
|
{
|
|
static GstStaticCaps anycaps = GST_STATIC_CAPS ("ANY");
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
if (GST_PAD_PAD_TEMPLATE (pad))
|
|
return GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (pad));
|
|
|
|
return gst_static_caps_get (&anycaps);
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_pad_get_peer:
|
|
* @pad: a #GstPad to get the peer of.
|
|
*
|
|
* Gets the peer of @pad. This function refs the peer pad so
|
|
* you need to unref it after use.
|
|
*
|
|
* Returns: the peer #GstPad. Unref after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstPad *
|
|
gst_pad_get_peer (GstPad * pad)
|
|
{
|
|
GstRealPad *realpad;
|
|
GstRealPad *result;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
result = GST_RPAD_PEER (realpad);
|
|
if (result)
|
|
gst_object_ref (GST_OBJECT (result));
|
|
GST_UNLOCK (realpad);
|
|
|
|
return GST_PAD_CAST (result);
|
|
|
|
lost_ghostpad:
|
|
{
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_realize:
|
|
* @pad: a #GstPad to realize
|
|
*
|
|
* If the pad is a #GstRealPad, it is simply returned, else
|
|
* the #GstGhostPad will be dereffed to the real pad.
|
|
*
|
|
* After this function you always receive the real pad of
|
|
* the provided pad.
|
|
*
|
|
* This function unrefs the input pad and refs the result so
|
|
* that you can write constructs like:
|
|
*
|
|
* pad = gst_pad_realize(pad)
|
|
*
|
|
* without having to unref the old pad.
|
|
*
|
|
* Returns: the real #GstPad or NULL when an old reference to a
|
|
* ghostpad is used.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstPad *
|
|
gst_pad_realize (GstPad * pad)
|
|
{
|
|
GstRealPad *result;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_LOCK (pad);
|
|
result = GST_PAD_REALIZE (pad);
|
|
if (result && pad != GST_PAD_CAST (result)) {
|
|
gst_object_ref (GST_OBJECT (result));
|
|
GST_UNLOCK (pad);
|
|
/* no other thread could dispose this since we
|
|
* hold at least one ref */
|
|
gst_object_unref (GST_OBJECT (pad));
|
|
} else {
|
|
GST_UNLOCK (pad);
|
|
}
|
|
|
|
return GST_PAD_CAST (result);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_allowed_caps:
|
|
* @srcpad: a #GstPad, it must a a source pad.
|
|
*
|
|
* Gets the capabilities of the allowed media types that can flow through @pad
|
|
* and its peer. The pad must be a source pad.
|
|
* The caller must free the resulting caps.
|
|
*
|
|
* Returns: the allowed #GstCaps of the pad link. Free the caps when
|
|
* you no longer need it. This function returns NULL when the @pad has no
|
|
* peer.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_get_allowed_caps (GstPad * srcpad)
|
|
{
|
|
GstCaps *mycaps;
|
|
GstCaps *caps;
|
|
GstCaps *peercaps;
|
|
GstRealPad *realpad, *peer;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), NULL);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (srcpad, realpad, lost_ghostpad);
|
|
|
|
if (G_UNLIKELY ((peer = GST_RPAD_PEER (realpad)) == NULL))
|
|
goto no_peer;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PROPERTIES, "%s:%s: getting allowed caps",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
|
|
gst_object_ref (GST_OBJECT_CAST (peer));
|
|
GST_UNLOCK (realpad);
|
|
mycaps = gst_pad_get_caps (GST_PAD_CAST (realpad));
|
|
|
|
peercaps = gst_pad_get_caps (GST_PAD_CAST (peer));
|
|
gst_object_unref (GST_OBJECT_CAST (peer));
|
|
|
|
caps = gst_caps_intersect (mycaps, peercaps);
|
|
gst_caps_unref (peercaps);
|
|
gst_caps_unref (mycaps);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "allowed caps %" GST_PTR_FORMAT, caps);
|
|
|
|
return caps;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
GST_UNLOCK (srcpad);
|
|
return NULL;
|
|
}
|
|
no_peer:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_PROPERTIES, "%s:%s: no peer",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
GST_UNLOCK (realpad);
|
|
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_negotiated_caps:
|
|
* @pad: a #GstPad.
|
|
*
|
|
* Gets the capabilities of the media type that currently flows through @pad
|
|
* and its peer.
|
|
*
|
|
* This function can be used on both src and sinkpads. Note that srcpads are
|
|
* always negotiated before sinkpads so it is possible that the negotiated caps
|
|
* on the srcpad do not match the negotiated caps of the peer.
|
|
*
|
|
* Returns: the negotiated #GstCaps of the pad link. Free the caps when
|
|
* you no longer need it. This function returns NULL when the @pad has no
|
|
* peer or is not negotiated yet.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_get_negotiated_caps (GstPad * pad)
|
|
{
|
|
GstCaps *caps;
|
|
GstRealPad *realpad, *peer;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_PAD_REALIZE_AND_LOCK (pad, realpad, lost_ghostpad);
|
|
|
|
if (G_UNLIKELY ((peer = GST_RPAD_PEER (realpad)) == NULL))
|
|
goto no_peer;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PROPERTIES, "%s:%s: getting negotiated caps",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
|
|
caps = GST_RPAD_CAPS (realpad);
|
|
if (caps)
|
|
gst_caps_ref (caps);
|
|
GST_UNLOCK (pad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "negotiated caps %" GST_PTR_FORMAT, caps);
|
|
|
|
return caps;
|
|
|
|
lost_ghostpad:
|
|
{
|
|
GST_UNLOCK (pad);
|
|
return NULL;
|
|
}
|
|
no_peer:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_PROPERTIES, "%s:%s: no peer",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
GST_UNLOCK (realpad);
|
|
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_alloc_buffer:
|
|
* @pad: a source #GstPad
|
|
* @offset: the offset of the new buffer in the stream
|
|
* @size: the size of the new buffer
|
|
* @caps: the caps of the new buffer
|
|
*
|
|
* Allocates a new, empty buffer optimized to push to pad @pad. This
|
|
* function only works if @pad is a source pad and a GST_REAL_PAD and
|
|
* has a peer.
|
|
* You need to check the caps of the buffer after performing this
|
|
* function and renegotiate to the format if needed.
|
|
*
|
|
* Returns: a new, empty #GstBuffer, or NULL if wrong parameters
|
|
* were provided or the peer pad is not able to provide a buffer
|
|
* that can be handled by the caller.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstBuffer *
|
|
gst_pad_alloc_buffer (GstPad * pad, guint64 offset, gint size, GstCaps * caps)
|
|
{
|
|
GstRealPad *peer;
|
|
GstBuffer *result = NULL;
|
|
GstPadBufferAllocFunction bufferallocfunc;
|
|
gboolean caps_changed;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), NULL);
|
|
g_return_val_if_fail (GST_PAD_IS_SRC (pad), NULL);
|
|
|
|
GST_LOCK (pad);
|
|
if (G_UNLIKELY ((peer = GST_RPAD_PEER (pad)) == NULL))
|
|
goto no_peer;
|
|
|
|
if (G_LIKELY ((bufferallocfunc = peer->bufferallocfunc) == NULL)) {
|
|
GST_UNLOCK (pad);
|
|
goto fallback;
|
|
}
|
|
|
|
gst_object_ref (GST_OBJECT_CAST (peer));
|
|
GST_UNLOCK (pad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"calling bufferallocfunc &%s (@%p) of peer pad %s:%s",
|
|
GST_DEBUG_FUNCPTR_NAME (bufferallocfunc),
|
|
&bufferallocfunc, GST_DEBUG_PAD_NAME (peer));
|
|
|
|
result = bufferallocfunc (GST_PAD_CAST (peer), offset, size, caps);
|
|
|
|
gst_object_unref (GST_OBJECT_CAST (peer));
|
|
|
|
if (G_UNLIKELY (result == NULL)) {
|
|
goto fallback;
|
|
}
|
|
|
|
do_caps:
|
|
/* FIXME, move capnego this into a base class? */
|
|
caps = GST_BUFFER_CAPS (result);
|
|
caps_changed = caps && caps != GST_RPAD_CAPS (pad);
|
|
/* we got a new datatype on the pad, see if it can handle it */
|
|
if (G_UNLIKELY (caps_changed)) {
|
|
if (G_UNLIKELY (!gst_pad_configure_src (GST_PAD_CAST (pad), caps)))
|
|
goto not_negotiated;
|
|
}
|
|
|
|
return result;
|
|
|
|
no_peer:
|
|
{
|
|
/* pad has no peer */
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"%s:%s called bufferallocfunc but had no peer, returning NULL",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
GST_UNLOCK (pad);
|
|
return NULL;
|
|
}
|
|
/* fallback case, allocate a buffer of our own, add pad caps. */
|
|
fallback:
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"%s:%s fallback buffer alloc", GST_DEBUG_PAD_NAME (pad));
|
|
result = gst_buffer_new_and_alloc (size);
|
|
gst_buffer_set_caps (result, caps);
|
|
|
|
goto do_caps;
|
|
}
|
|
not_negotiated:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"alloc function retured unacceptable buffer");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_internal_links_default:
|
|
* @pad: the #GstPad to get the internal links of.
|
|
*
|
|
* Gets a list of pads to which the given pad is linked to
|
|
* inside of the parent element.
|
|
* This is the default handler, and thus returns a list of all of the
|
|
* pads inside the parent element with opposite direction.
|
|
* The caller must free this list after use.
|
|
*
|
|
* Returns: a newly allocated #GList of pads.
|
|
*
|
|
* Not MT safe.
|
|
*/
|
|
GList *
|
|
gst_pad_get_internal_links_default (GstPad * pad)
|
|
{
|
|
GList *res = NULL;
|
|
GstElement *parent;
|
|
GList *parent_pads;
|
|
GstPadDirection direction;
|
|
GstRealPad *rpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
direction = rpad->direction;
|
|
|
|
parent = GST_PAD_PARENT (rpad);
|
|
parent_pads = parent->pads;
|
|
|
|
while (parent_pads) {
|
|
GstRealPad *parent_pad = GST_PAD_REALIZE (parent_pads->data);
|
|
|
|
if (parent_pad->direction != direction) {
|
|
res = g_list_prepend (res, parent_pad);
|
|
}
|
|
|
|
parent_pads = g_list_next (parent_pads);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_internal_links:
|
|
* @pad: the #GstPad to get the internal links of.
|
|
*
|
|
* Gets a list of pads to which the given pad is linked to
|
|
* inside of the parent element.
|
|
* The caller must free this list after use.
|
|
*
|
|
* Returns: a newly allocated #GList of pads.
|
|
*
|
|
* Not MT safe.
|
|
*/
|
|
GList *
|
|
gst_pad_get_internal_links (GstPad * pad)
|
|
{
|
|
GList *res = NULL;
|
|
GstRealPad *rpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
if (GST_RPAD_INTLINKFUNC (rpad))
|
|
res = GST_RPAD_INTLINKFUNC (rpad) (GST_PAD_CAST (rpad));
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_pad_event_default_dispatch (GstPad * pad, GstEvent * event)
|
|
{
|
|
GList *orig, *pads;
|
|
gboolean result;
|
|
|
|
GST_INFO_OBJECT (pad, "Sending event %p to all internally linked pads",
|
|
event);
|
|
|
|
result = (GST_PAD_DIRECTION (pad) == GST_PAD_SINK);
|
|
|
|
orig = pads = gst_pad_get_internal_links (pad);
|
|
|
|
while (pads) {
|
|
GstPad *eventpad = GST_PAD (pads->data);
|
|
|
|
pads = g_list_next (pads);
|
|
|
|
/* for all of the internally-linked pads that are actually linked */
|
|
if (GST_PAD_IS_LINKED (eventpad)) {
|
|
if (GST_PAD_DIRECTION (eventpad) == GST_PAD_SRC) {
|
|
/* for each pad we send to, we should ref the event; it's up
|
|
* to downstream to unref again when handled. */
|
|
GST_LOG_OBJECT (pad, "Reffing and sending event %p to %s:%s", event,
|
|
GST_DEBUG_PAD_NAME (eventpad));
|
|
gst_event_ref (event);
|
|
gst_pad_push_event (eventpad, event);
|
|
} else {
|
|
/* we only send the event on one pad, multi-sinkpad elements
|
|
* should implement a handler */
|
|
GST_LOG_OBJECT (pad, "sending event %p to one sink pad %s:%s", event,
|
|
GST_DEBUG_PAD_NAME (eventpad));
|
|
result = gst_pad_push_event (eventpad, event);
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
/* we handled the incoming event so we unref once */
|
|
GST_LOG_OBJECT (pad, "handled event %p, unreffing", event);
|
|
gst_event_unref (event);
|
|
|
|
done:
|
|
g_list_free (orig);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_event_default:
|
|
* @pad: a #GstPad to call the default event handler on.
|
|
* @event: the #GstEvent to handle.
|
|
*
|
|
* Invokes the default event handler for the given pad. End-of-stream and
|
|
* discontinuity events are handled specially, and then the event is sent to all
|
|
* pads internally linked to @pad. Note that if there are many possible sink
|
|
* pads that are internally linked to @pad, only one will be sent an event.
|
|
* Multi-sinkpad elements should implement custom event handlers.
|
|
*
|
|
* Returns: TRUE if the event was sent succesfully.
|
|
*/
|
|
gboolean
|
|
gst_pad_event_default (GstPad * pad, GstEvent * event)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
{
|
|
GstRealPad *rpad = GST_PAD_REALIZE (pad);
|
|
|
|
if (GST_RPAD_TASK (rpad)) {
|
|
GST_DEBUG_OBJECT (rpad, "pausing task because of eos");
|
|
gst_task_pause (GST_RPAD_TASK (rpad));
|
|
}
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return gst_pad_event_default_dispatch (pad, event);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_dispatcher:
|
|
* @pad: a #GstPad to dispatch.
|
|
* @dispatch: the #GstDispatcherFunction to call.
|
|
* @data: gpointer user data passed to the dispatcher function.
|
|
*
|
|
* Invokes the given dispatcher function on all pads that are
|
|
* internally linked to the given pad.
|
|
* The GstPadDispatcherFunction should return TRUE when no further pads
|
|
* need to be processed.
|
|
*
|
|
* Returns: TRUE if one of the dispatcher functions returned TRUE.
|
|
*/
|
|
gboolean
|
|
gst_pad_dispatcher (GstPad * pad, GstPadDispatcherFunction dispatch,
|
|
gpointer data)
|
|
{
|
|
gboolean res = FALSE;
|
|
GList *int_pads, *orig;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (dispatch != NULL, FALSE);
|
|
|
|
orig = int_pads = gst_pad_get_internal_links (pad);
|
|
|
|
while (int_pads) {
|
|
GstRealPad *int_rpad = GST_PAD_REALIZE (int_pads->data);
|
|
GstRealPad *int_peer = GST_RPAD_PEER (int_rpad);
|
|
|
|
if (int_peer) {
|
|
res = dispatch (GST_PAD (int_peer), data);
|
|
if (res)
|
|
break;
|
|
}
|
|
int_pads = g_list_next (int_pads);
|
|
}
|
|
|
|
g_list_free (orig);
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_query:
|
|
* @pad: a #GstPad to invoke the default query on.
|
|
* @query: the #GstQuery to perform.
|
|
*
|
|
* Dispatches a query to a pad. The query should have been allocated by the
|
|
* caller via one of the type-specific allocation functions in gstquery.h. The
|
|
* element is responsible for filling the query with an appropriate response,
|
|
* which should then be parsed with a type-specific query parsing function.
|
|
*
|
|
* Again, the caller is responsible for both the allocation and deallocation of
|
|
* the query structure.
|
|
*
|
|
* Returns: TRUE if the query could be performed.
|
|
*/
|
|
gboolean
|
|
gst_pad_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
GstRealPad *rpad;
|
|
GstPadQueryFunction func;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
g_return_val_if_fail (rpad, FALSE);
|
|
|
|
GST_DEBUG ("sending query %p to pad %s:%s", query, GST_DEBUG_PAD_NAME (pad));
|
|
|
|
if ((func = GST_RPAD_QUERYFUNC (rpad)) == NULL)
|
|
goto no_func;
|
|
|
|
return func (GST_PAD_CAST (rpad), query);
|
|
|
|
no_func:
|
|
{
|
|
GST_DEBUG ("pad had no query function");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_pad_query_default (GstPad * pad, GstQuery * query)
|
|
{
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_POSITION:
|
|
case GST_QUERY_SEEKING:
|
|
case GST_QUERY_FORMATS:
|
|
case GST_QUERY_LATENCY:
|
|
case GST_QUERY_JITTER:
|
|
case GST_QUERY_RATE:
|
|
case GST_QUERY_CONVERT:
|
|
default:
|
|
return gst_pad_dispatcher
|
|
(pad, (GstPadDispatcherFunction) gst_pad_query, query);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_real_pad_dispose (GObject * object)
|
|
{
|
|
GstPad *pad;
|
|
GstRealPad *rpad;
|
|
|
|
pad = GST_PAD (object);
|
|
rpad = GST_REAL_PAD (object);
|
|
|
|
/* No linked pad can ever be disposed.
|
|
* It has to have a parent to be linked
|
|
* and a parent would hold a reference */
|
|
/* FIXME: what about if g_object_dispose is explicitly called on the pad? Is
|
|
that legal? otherwise we could assert GST_OBJECT_PARENT (pad) == NULL as
|
|
well... */
|
|
g_assert (GST_PAD_PEER (pad) == NULL);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_REFCOUNTING, "dispose %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
/* we destroy the ghostpads, because they are nothing without the real pad */
|
|
if (rpad->ghostpads) {
|
|
GList *orig, *ghostpads;
|
|
|
|
orig = ghostpads = g_list_copy (rpad->ghostpads);
|
|
|
|
while (ghostpads) {
|
|
GstPad *ghostpad = GST_PAD (ghostpads->data);
|
|
|
|
if (GST_IS_ELEMENT (GST_OBJECT_PARENT (ghostpad))) {
|
|
GstElement *parent = GST_ELEMENT (GST_OBJECT_PARENT (ghostpad));
|
|
|
|
GST_CAT_DEBUG (GST_CAT_REFCOUNTING,
|
|
"removing ghost pad from element '%s'", GST_OBJECT_NAME (parent));
|
|
gst_element_remove_pad (parent, ghostpad);
|
|
} else {
|
|
/* handle the case where we have some floating ghost pad that was never
|
|
added to an element */
|
|
g_object_set (ghostpad, "real-pad", NULL, NULL);
|
|
}
|
|
ghostpads = g_list_next (ghostpads);
|
|
}
|
|
g_list_free (orig);
|
|
/* as the ghost pads are removed, they remove themselves from ->ghostpads.
|
|
So it should be empty now. Let's assert that. */
|
|
g_assert (rpad->ghostpads == NULL);
|
|
}
|
|
|
|
/* clear the caps */
|
|
gst_caps_replace (&GST_RPAD_CAPS (pad), NULL);
|
|
|
|
if (GST_IS_ELEMENT (GST_OBJECT_PARENT (pad))) {
|
|
GST_CAT_DEBUG (GST_CAT_REFCOUNTING, "removing pad from element '%s'",
|
|
GST_OBJECT_NAME (GST_OBJECT (GST_ELEMENT (GST_OBJECT_PARENT (pad)))));
|
|
|
|
gst_element_remove_pad (GST_ELEMENT (GST_OBJECT_PARENT (pad)), pad);
|
|
}
|
|
|
|
G_OBJECT_CLASS (real_pad_parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_real_pad_finalize (GObject * object)
|
|
{
|
|
GstRealPad *rpad;
|
|
|
|
rpad = GST_REAL_PAD (object);
|
|
|
|
if (rpad->stream_rec_lock) {
|
|
g_static_rec_mutex_free (rpad->stream_rec_lock);
|
|
rpad->stream_rec_lock = NULL;
|
|
}
|
|
if (rpad->preroll_lock) {
|
|
g_mutex_free (rpad->preroll_lock);
|
|
g_cond_free (rpad->preroll_cond);
|
|
rpad->preroll_lock = NULL;
|
|
rpad->preroll_cond = NULL;
|
|
}
|
|
if (rpad->block_cond) {
|
|
g_cond_free (rpad->block_cond);
|
|
rpad->block_cond = NULL;
|
|
}
|
|
|
|
G_OBJECT_CLASS (real_pad_parent_class)->finalize (object);
|
|
}
|
|
|
|
|
|
#ifndef GST_DISABLE_LOADSAVE
|
|
/* FIXME: why isn't this on a GstElement ? */
|
|
/**
|
|
* gst_pad_load_and_link:
|
|
* @self: an #xmlNodePtr to read the description from.
|
|
* @parent: the #GstObject element that owns the pad.
|
|
*
|
|
* Reads the pad definition from the XML node and links the given pad
|
|
* in the element to a pad of an element up in the hierarchy.
|
|
*/
|
|
void
|
|
gst_pad_load_and_link (xmlNodePtr self, GstObject * parent)
|
|
{
|
|
xmlNodePtr field = self->xmlChildrenNode;
|
|
GstPad *pad = NULL, *targetpad;
|
|
gchar *peer = NULL;
|
|
gchar **split;
|
|
GstElement *target;
|
|
GstObject *grandparent;
|
|
gchar *name = NULL;
|
|
|
|
while (field) {
|
|
if (!strcmp ((char *) field->name, "name")) {
|
|
name = (gchar *) xmlNodeGetContent (field);
|
|
pad = gst_element_get_pad (GST_ELEMENT (parent), name);
|
|
g_free (name);
|
|
} else if (!strcmp ((char *) field->name, "peer")) {
|
|
peer = (gchar *) xmlNodeGetContent (field);
|
|
}
|
|
field = field->next;
|
|
}
|
|
g_return_if_fail (pad != NULL);
|
|
|
|
if (peer == NULL)
|
|
return;
|
|
|
|
split = g_strsplit (peer, ".", 2);
|
|
|
|
if (split[0] == NULL || split[1] == NULL) {
|
|
GST_CAT_DEBUG (GST_CAT_XML,
|
|
"Could not parse peer '%s' for pad %s:%s, leaving unlinked",
|
|
peer, GST_DEBUG_PAD_NAME (pad));
|
|
|
|
g_free (peer);
|
|
return;
|
|
}
|
|
g_free (peer);
|
|
|
|
g_return_if_fail (split[0] != NULL);
|
|
g_return_if_fail (split[1] != NULL);
|
|
|
|
grandparent = gst_object_get_parent (parent);
|
|
|
|
if (grandparent && GST_IS_BIN (grandparent)) {
|
|
target = gst_bin_get_by_name_recurse_up (GST_BIN (grandparent), split[0]);
|
|
} else
|
|
goto cleanup;
|
|
|
|
if (target == NULL)
|
|
goto cleanup;
|
|
|
|
targetpad = gst_element_get_pad (target, split[1]);
|
|
|
|
if (targetpad == NULL)
|
|
goto cleanup;
|
|
|
|
gst_pad_link (pad, targetpad);
|
|
|
|
cleanup:
|
|
g_strfreev (split);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_save_thyself:
|
|
* @pad: a #GstPad to save.
|
|
* @parent: the parent #xmlNodePtr to save the description in.
|
|
*
|
|
* Saves the pad into an xml representation.
|
|
*
|
|
* Returns: the #xmlNodePtr representation of the pad.
|
|
*/
|
|
static xmlNodePtr
|
|
gst_pad_save_thyself (GstObject * object, xmlNodePtr parent)
|
|
{
|
|
GstRealPad *realpad;
|
|
GstPad *peer;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (object), NULL);
|
|
|
|
realpad = GST_REAL_PAD (object);
|
|
|
|
xmlNewChild (parent, NULL, (xmlChar *) "name",
|
|
(xmlChar *) GST_PAD_NAME (realpad));
|
|
if (GST_RPAD_PEER (realpad) != NULL) {
|
|
gchar *content;
|
|
|
|
peer = GST_PAD (GST_RPAD_PEER (realpad));
|
|
/* first check to see if the peer's parent's parent is the same */
|
|
/* we just save it off */
|
|
content = g_strdup_printf ("%s.%s",
|
|
GST_OBJECT_NAME (GST_PAD_PARENT (peer)), GST_PAD_NAME (peer));
|
|
xmlNewChild (parent, NULL, (xmlChar *) "peer", (xmlChar *) content);
|
|
g_free (content);
|
|
} else
|
|
xmlNewChild (parent, NULL, (xmlChar *) "peer", NULL);
|
|
|
|
return parent;
|
|
}
|
|
|
|
/**
|
|
* gst_ghost_pad_save_thyself:
|
|
* @pad: a ghost #GstPad to save.
|
|
* @parent: the parent #xmlNodePtr to save the description in.
|
|
*
|
|
* Saves the ghost pad into an xml representation.
|
|
*
|
|
* Returns: the #xmlNodePtr representation of the pad.
|
|
*/
|
|
xmlNodePtr
|
|
gst_ghost_pad_save_thyself (GstPad * pad, xmlNodePtr parent)
|
|
{
|
|
xmlNodePtr self;
|
|
|
|
g_return_val_if_fail (GST_IS_GHOST_PAD (pad), NULL);
|
|
|
|
self = xmlNewChild (parent, NULL, (xmlChar *) "ghostpad", NULL);
|
|
xmlNewChild (self, NULL, (xmlChar *) "name", (xmlChar *) GST_PAD_NAME (pad));
|
|
xmlNewChild (self, NULL, (xmlChar *) "parent",
|
|
(xmlChar *) GST_OBJECT_NAME (GST_PAD_PARENT (pad)));
|
|
|
|
/* FIXME FIXME FIXME! */
|
|
|
|
return self;
|
|
}
|
|
#endif /* GST_DISABLE_LOADSAVE */
|
|
|
|
/*
|
|
* should be called with pad lock held
|
|
*
|
|
* MT safe.
|
|
*/
|
|
static void
|
|
handle_pad_block (GstRealPad * pad)
|
|
{
|
|
GstPadBlockCallback callback;
|
|
gpointer user_data;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"signal block taken on pad %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
/* need to grab extra ref for the callbacks */
|
|
gst_object_ref (GST_OBJECT (pad));
|
|
|
|
callback = pad->block_callback;
|
|
if (callback) {
|
|
user_data = pad->block_data;
|
|
GST_UNLOCK (pad);
|
|
callback (GST_PAD_CAST (pad), TRUE, user_data);
|
|
GST_LOCK (pad);
|
|
} else {
|
|
GST_PAD_BLOCK_SIGNAL (pad);
|
|
}
|
|
|
|
while (GST_RPAD_IS_BLOCKED (pad))
|
|
GST_PAD_BLOCK_WAIT (pad);
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad, "got unblocked");
|
|
|
|
callback = pad->block_callback;
|
|
if (callback) {
|
|
user_data = pad->block_data;
|
|
GST_UNLOCK (pad);
|
|
callback (GST_PAD_CAST (pad), FALSE, user_data);
|
|
GST_LOCK (pad);
|
|
} else {
|
|
GST_PAD_BLOCK_SIGNAL (pad);
|
|
}
|
|
|
|
gst_object_unref (GST_OBJECT (pad));
|
|
}
|
|
|
|
/**********************************************************************
|
|
* Data passing functions
|
|
*/
|
|
|
|
|
|
/**
|
|
* gst_pad_push:
|
|
* @pad: a source #GstPad.
|
|
* @buffer: the #GstBuffer to push.
|
|
*
|
|
* Pushes a buffer to the peer of @pad. @pad must be linked.
|
|
*
|
|
* Returns: a #GstFlowReturn from the peer pad.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstFlowReturn
|
|
gst_pad_push (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstRealPad *peer;
|
|
GstFlowReturn ret;
|
|
GstPadChainFunction chainfunc;
|
|
GstCaps *caps;
|
|
gboolean caps_changed;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_RPAD_DIRECTION (pad) == GST_PAD_SRC,
|
|
GST_FLOW_ERROR);
|
|
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
|
|
|
|
|
|
GST_LOCK (pad);
|
|
while (G_UNLIKELY (GST_RPAD_IS_BLOCKED (pad)))
|
|
handle_pad_block (GST_REAL_PAD_CAST (pad));
|
|
|
|
if (G_UNLIKELY ((peer = GST_RPAD_PEER (pad)) == NULL))
|
|
goto not_linked;
|
|
|
|
if (G_UNLIKELY (!GST_RPAD_IS_ACTIVE (peer)))
|
|
goto not_active;
|
|
|
|
if (G_UNLIKELY (GST_RPAD_IS_FLUSHING (peer)))
|
|
goto flushing;
|
|
|
|
gst_object_ref (GST_OBJECT_CAST (peer));
|
|
GST_UNLOCK (pad);
|
|
|
|
/* FIXME, move capnego this into a base class? */
|
|
caps = GST_BUFFER_CAPS (buffer);
|
|
caps_changed = caps && caps != GST_RPAD_CAPS (peer);
|
|
GST_DEBUG ("caps changed %d %" GST_PTR_FORMAT, caps_changed, caps);
|
|
/* we got a new datatype on the peer pad, see if it can handle it */
|
|
if (G_UNLIKELY (caps_changed)) {
|
|
if (G_UNLIKELY (!gst_pad_configure_sink (GST_PAD_CAST (peer), caps)))
|
|
goto not_negotiated;
|
|
}
|
|
|
|
/* NOTE: we read the peer chainfunc unlocked.
|
|
* we cannot hold the lock for the peer so we might send
|
|
* the data to the wrong function. This is not really a
|
|
* problem since functions are assigned at creation time
|
|
* and don't change that often... */
|
|
if (G_UNLIKELY ((chainfunc = peer->chainfunc) == NULL))
|
|
goto no_function;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"calling chainfunction &%s of peer pad %s:%s",
|
|
GST_DEBUG_FUNCPTR_NAME (chainfunc), GST_DEBUG_PAD_NAME (peer));
|
|
|
|
ret = chainfunc (GST_PAD_CAST (peer), buffer);
|
|
|
|
gst_object_unref (GST_OBJECT_CAST (peer));
|
|
|
|
return ret;
|
|
|
|
/* ERROR recovery here */
|
|
not_linked:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pushing, but it was not linked");
|
|
GST_UNLOCK (pad);
|
|
return GST_FLOW_NOT_CONNECTED;
|
|
}
|
|
not_active:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pushing, but it was inactive");
|
|
GST_UNLOCK (pad);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
flushing:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pushing, but pad was flushing");
|
|
GST_UNLOCK (pad);
|
|
return GST_FLOW_UNEXPECTED;
|
|
}
|
|
not_negotiated:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pushing buffer but peer did not accept");
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
no_function:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pushing, but not chainhandler");
|
|
GST_ELEMENT_ERROR (GST_PAD_PARENT (pad), CORE, PAD, (NULL),
|
|
("push on pad %s:%s but the peer pad %s:%s has no chainfunction",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (peer)));
|
|
gst_object_unref (GST_OBJECT (peer));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_check_pull_range:
|
|
* @pad: a sink #GstRealPad.
|
|
*
|
|
* Checks if a #gst_pad_pull_range() can be performed on the peer
|
|
* source pad. This function is used by plugins that want to check
|
|
* if they can use random access on the peer source pad.
|
|
*
|
|
* The peer sourcepad can implement a custom #GstPadCheckGetRangeFunction
|
|
* if it needs to perform some logic to determine if pull_range is
|
|
* possible.
|
|
*
|
|
* Returns: a gboolean with the result.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_check_pull_range (GstPad * pad)
|
|
{
|
|
GstRealPad *peer;
|
|
gboolean ret;
|
|
GstPadCheckGetRangeFunction checkgetrangefunc;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), FALSE);
|
|
|
|
GST_LOCK (pad);
|
|
if (GST_RPAD_DIRECTION (pad) != GST_PAD_SINK)
|
|
goto wrong_direction;
|
|
|
|
if (G_UNLIKELY ((peer = GST_RPAD_PEER (pad)) == NULL))
|
|
goto not_connected;
|
|
|
|
gst_object_ref (GST_OBJECT_CAST (peer));
|
|
GST_UNLOCK (pad);
|
|
|
|
/* see note in above function */
|
|
if (G_LIKELY ((checkgetrangefunc = peer->checkgetrangefunc) == NULL)) {
|
|
ret = GST_RPAD_GETRANGEFUNC (peer) != NULL;
|
|
} else {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"calling checkgetrangefunc %s of peer pad %s:%s",
|
|
GST_DEBUG_FUNCPTR_NAME (checkgetrangefunc), GST_DEBUG_PAD_NAME (peer));
|
|
|
|
ret = checkgetrangefunc (GST_PAD_CAST (peer));
|
|
}
|
|
|
|
gst_object_unref (GST_OBJECT_CAST (peer));
|
|
|
|
return ret;
|
|
|
|
/* ERROR recovery here */
|
|
wrong_direction:
|
|
{
|
|
GST_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
not_connected:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"checking pull range, but it was not linked");
|
|
GST_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_pull_range:
|
|
* @pad: a sink #GstPad.
|
|
* @buffer: a pointer to hold the #GstBuffer.
|
|
* @offset: The start offset of the buffer
|
|
* @length: The length of the buffer
|
|
*
|
|
* Pulls a buffer from the peer pad. @pad must be linked.
|
|
*
|
|
* Returns: a #GstFlowReturn from the peer pad.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstFlowReturn
|
|
gst_pad_pull_range (GstPad * pad, guint64 offset, guint size,
|
|
GstBuffer ** buffer)
|
|
{
|
|
GstRealPad *peer;
|
|
GstFlowReturn ret;
|
|
GstPadGetRangeFunction getrangefunc;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), GST_FLOW_ERROR);
|
|
g_return_val_if_fail (GST_RPAD_DIRECTION (pad) == GST_PAD_SINK,
|
|
GST_FLOW_ERROR);
|
|
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
|
|
|
|
GST_LOCK (pad);
|
|
|
|
while (G_UNLIKELY (GST_RPAD_IS_BLOCKED (pad)))
|
|
handle_pad_block (GST_REAL_PAD_CAST (pad));
|
|
|
|
if (G_UNLIKELY ((peer = GST_RPAD_PEER (pad)) == NULL))
|
|
goto not_connected;
|
|
|
|
if (G_UNLIKELY (!GST_RPAD_IS_ACTIVE (peer)))
|
|
goto not_active;
|
|
|
|
if (G_UNLIKELY (GST_RPAD_IS_FLUSHING (peer)))
|
|
goto flushing;
|
|
|
|
gst_object_ref (GST_OBJECT_CAST (peer));
|
|
GST_UNLOCK (pad);
|
|
|
|
/* see note in above function */
|
|
if (G_UNLIKELY ((getrangefunc = peer->getrangefunc) == NULL))
|
|
goto no_function;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"calling getrangefunc %s of peer pad %s:%s, offset %"
|
|
G_GUINT64_FORMAT ", size %u",
|
|
GST_DEBUG_FUNCPTR_NAME (getrangefunc), GST_DEBUG_PAD_NAME (peer),
|
|
offset, size);
|
|
|
|
ret = getrangefunc (GST_PAD_CAST (peer), offset, size, buffer);
|
|
|
|
gst_object_unref (GST_OBJECT_CAST (peer));
|
|
|
|
return ret;
|
|
|
|
/* ERROR recovery here */
|
|
not_connected:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pulling range, but it was not linked");
|
|
GST_UNLOCK (pad);
|
|
return GST_FLOW_NOT_CONNECTED;
|
|
}
|
|
not_active:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pulling range, but it was inactive");
|
|
GST_UNLOCK (pad);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
flushing:
|
|
{
|
|
GST_CAT_LOG_OBJECT (GST_CAT_SCHEDULING, pad,
|
|
"pulling range, but pad was flushing");
|
|
GST_UNLOCK (pad);
|
|
return GST_FLOW_UNEXPECTED;
|
|
}
|
|
no_function:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_PAD_PARENT (pad), CORE, PAD, (NULL),
|
|
("pullrange on pad %s:%s but the peer pad %s:%s has no getrangefunction",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (peer)));
|
|
gst_object_unref (GST_OBJECT (peer));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_push_event:
|
|
* @pad: a #GstPad to push the event to.
|
|
* @event: the #GstEvent to send to the pad.
|
|
*
|
|
* Sends the event to the peer of the given pad.
|
|
*
|
|
* Returns: TRUE if the event was handled.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_pad_push_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstRealPad *peerpad;
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
GST_LOCK (pad);
|
|
peerpad = GST_RPAD_PEER (pad);
|
|
if (peerpad == NULL)
|
|
goto not_linked;
|
|
|
|
gst_object_ref (GST_OBJECT_CAST (peerpad));
|
|
GST_UNLOCK (pad);
|
|
|
|
result = gst_pad_send_event (GST_PAD_CAST (peerpad), event);
|
|
|
|
gst_object_unref (GST_OBJECT_CAST (peerpad));
|
|
|
|
return result;
|
|
|
|
/* ERROR handling */
|
|
not_linked:
|
|
{
|
|
GST_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_send_event:
|
|
* @pad: a #GstPad to send the event to.
|
|
* @event: the #GstEvent to send to the pad.
|
|
*
|
|
* Sends the event to the pad. This function can be used
|
|
* by applications to send events in the pipeline.
|
|
*
|
|
* Returns: TRUE if the event was handled.
|
|
*/
|
|
gboolean
|
|
gst_pad_send_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean result = FALSE;
|
|
GstRealPad *rpad;
|
|
GstPadEventFunction eventfunc;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
if (GST_EVENT_SRC (event) == NULL)
|
|
GST_EVENT_SRC (event) = gst_object_ref (GST_OBJECT (rpad));
|
|
|
|
GST_CAT_DEBUG (GST_CAT_EVENT, "have event type %d on pad %s:%s",
|
|
GST_EVENT_TYPE (event), GST_DEBUG_PAD_NAME (rpad));
|
|
|
|
if (GST_PAD_IS_SINK (pad)) {
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH) {
|
|
GST_CAT_DEBUG (GST_CAT_EVENT, "have flush event");
|
|
GST_LOCK (pad);
|
|
if (GST_EVENT_FLUSH_DONE (event)) {
|
|
GST_CAT_DEBUG (GST_CAT_EVENT, "clear flush flag");
|
|
GST_FLAG_UNSET (pad, GST_PAD_FLUSHING);
|
|
} else {
|
|
GST_CAT_DEBUG (GST_CAT_EVENT, "set flush flag");
|
|
GST_FLAG_SET (pad, GST_PAD_FLUSHING);
|
|
}
|
|
GST_UNLOCK (pad);
|
|
}
|
|
}
|
|
|
|
if ((eventfunc = GST_RPAD_EVENTFUNC (rpad)) == NULL)
|
|
goto no_function;
|
|
|
|
result = eventfunc (GST_PAD_CAST (rpad), event);
|
|
|
|
return result;
|
|
|
|
/* ERROR handling */
|
|
no_function:
|
|
{
|
|
g_warning ("pad %s:%s has no event handler, file a bug.",
|
|
GST_DEBUG_PAD_NAME (rpad));
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/************************************************************************
|
|
*
|
|
* templates
|
|
*
|
|
*/
|
|
static void gst_pad_template_class_init (GstPadTemplateClass * klass);
|
|
static void gst_pad_template_init (GstPadTemplate * templ);
|
|
static void gst_pad_template_dispose (GObject * object);
|
|
|
|
GType
|
|
gst_pad_template_get_type (void)
|
|
{
|
|
static GType padtemplate_type = 0;
|
|
|
|
if (!padtemplate_type) {
|
|
static const GTypeInfo padtemplate_info = {
|
|
sizeof (GstPadTemplateClass), NULL, NULL,
|
|
(GClassInitFunc) gst_pad_template_class_init, NULL, NULL,
|
|
sizeof (GstPadTemplate),
|
|
0,
|
|
(GInstanceInitFunc) gst_pad_template_init, NULL
|
|
};
|
|
|
|
padtemplate_type =
|
|
g_type_register_static (GST_TYPE_OBJECT, "GstPadTemplate",
|
|
&padtemplate_info, 0);
|
|
}
|
|
return padtemplate_type;
|
|
}
|
|
|
|
static void
|
|
gst_pad_template_class_init (GstPadTemplateClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstObjectClass *gstobject_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
gstobject_class = (GstObjectClass *) klass;
|
|
|
|
padtemplate_parent_class = g_type_class_ref (GST_TYPE_OBJECT);
|
|
|
|
gst_pad_template_signals[TEMPL_PAD_CREATED] =
|
|
g_signal_new ("pad-created", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (GstPadTemplateClass, pad_created),
|
|
NULL, NULL, gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
|
|
|
|
gobject_class->dispose = gst_pad_template_dispose;
|
|
|
|
gstobject_class->path_string_separator = "*";
|
|
}
|
|
|
|
static void
|
|
gst_pad_template_init (GstPadTemplate * templ)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gst_pad_template_dispose (GObject * object)
|
|
{
|
|
GstPadTemplate *templ = GST_PAD_TEMPLATE (object);
|
|
|
|
g_free (GST_PAD_TEMPLATE_NAME_TEMPLATE (templ));
|
|
if (GST_PAD_TEMPLATE_CAPS (templ)) {
|
|
gst_caps_unref (GST_PAD_TEMPLATE_CAPS (templ));
|
|
}
|
|
|
|
G_OBJECT_CLASS (padtemplate_parent_class)->dispose (object);
|
|
}
|
|
|
|
/* ALWAYS padtemplates cannot have conversion specifications, it doesn't make
|
|
* sense.
|
|
* SOMETIMES padtemplates can do whatever they want, they are provided by the
|
|
* element.
|
|
* REQUEST padtemplates can be reverse-parsed (the user asks for 'sink1', the
|
|
* 'sink%d' template is automatically selected), so we need to restrict their
|
|
* naming.
|
|
*/
|
|
static gboolean
|
|
name_is_valid (const gchar * name, GstPadPresence presence)
|
|
{
|
|
const gchar *str;
|
|
|
|
if (presence == GST_PAD_ALWAYS) {
|
|
if (strchr (name, '%')) {
|
|
g_warning ("invalid name template %s: conversion specifications are not"
|
|
" allowed for GST_PAD_ALWAYS padtemplates", name);
|
|
return FALSE;
|
|
}
|
|
} else if (presence == GST_PAD_REQUEST) {
|
|
if ((str = strchr (name, '%')) && strchr (str + 1, '%')) {
|
|
g_warning ("invalid name template %s: only one conversion specification"
|
|
" allowed in GST_PAD_REQUEST padtemplate", name);
|
|
return FALSE;
|
|
}
|
|
if (str && (*(str + 1) != 's' && *(str + 1) != 'd')) {
|
|
g_warning ("invalid name template %s: conversion specification must be of"
|
|
" type '%%d' or '%%s' for GST_PAD_REQUEST padtemplate", name);
|
|
return FALSE;
|
|
}
|
|
if (str && (*(str + 2) != '\0')) {
|
|
g_warning ("invalid name template %s: conversion specification must"
|
|
" appear at the end of the GST_PAD_REQUEST padtemplate name", name);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_static_pad_template_get:
|
|
* @pad_template: the static pad template
|
|
*
|
|
* Converts a #GstStaticPadTemplate into a #GstPadTemplate.
|
|
*
|
|
* Returns: a new #GstPadTemplate.
|
|
*/
|
|
GstPadTemplate *
|
|
gst_static_pad_template_get (GstStaticPadTemplate * pad_template)
|
|
{
|
|
GstPadTemplate *new;
|
|
|
|
if (!name_is_valid (pad_template->name_template, pad_template->presence))
|
|
return NULL;
|
|
|
|
new = g_object_new (gst_pad_template_get_type (),
|
|
"name", pad_template->name_template, NULL);
|
|
|
|
GST_PAD_TEMPLATE_NAME_TEMPLATE (new) = g_strdup (pad_template->name_template);
|
|
GST_PAD_TEMPLATE_DIRECTION (new) = pad_template->direction;
|
|
GST_PAD_TEMPLATE_PRESENCE (new) = pad_template->presence;
|
|
|
|
GST_PAD_TEMPLATE_CAPS (new) =
|
|
gst_caps_copy (gst_static_caps_get (&pad_template->static_caps));
|
|
|
|
return new;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_template_new:
|
|
* @name_template: the name template.
|
|
* @direction: the #GstPadDirection of the template.
|
|
* @presence: the #GstPadPresence of the pad.
|
|
* @caps: a #GstCaps set for the template. The caps are taken ownership of.
|
|
*
|
|
* Creates a new pad template with a name according to the given template
|
|
* and with the given arguments. This functions takes ownership of the provided
|
|
* caps, so be sure to not use them afterwards.
|
|
*
|
|
* Returns: a new #GstPadTemplate.
|
|
*/
|
|
GstPadTemplate *
|
|
gst_pad_template_new (const gchar * name_template,
|
|
GstPadDirection direction, GstPadPresence presence, GstCaps * caps)
|
|
{
|
|
GstPadTemplate *new;
|
|
|
|
g_return_val_if_fail (name_template != NULL, NULL);
|
|
g_return_val_if_fail (caps != NULL, NULL);
|
|
g_return_val_if_fail (direction == GST_PAD_SRC
|
|
|| direction == GST_PAD_SINK, NULL);
|
|
g_return_val_if_fail (presence == GST_PAD_ALWAYS
|
|
|| presence == GST_PAD_SOMETIMES || presence == GST_PAD_REQUEST, NULL);
|
|
|
|
if (!name_is_valid (name_template, presence))
|
|
return NULL;
|
|
|
|
new = g_object_new (gst_pad_template_get_type (),
|
|
"name", name_template, NULL);
|
|
|
|
GST_PAD_TEMPLATE_NAME_TEMPLATE (new) = g_strdup (name_template);
|
|
GST_PAD_TEMPLATE_DIRECTION (new) = direction;
|
|
GST_PAD_TEMPLATE_PRESENCE (new) = presence;
|
|
GST_PAD_TEMPLATE_CAPS (new) = caps;
|
|
|
|
return new;
|
|
}
|
|
|
|
/**
|
|
* gst_static_pad_template_get_caps:
|
|
* @templ: a #GstStaticPadTemplate to get capabilities of.
|
|
*
|
|
* Gets the capabilities of the static pad template.
|
|
*
|
|
* Returns: the #GstCaps of the static pad template. If you need to keep a
|
|
* reference to the caps, take a ref (see gst_caps_ref ()).
|
|
*/
|
|
GstCaps *
|
|
gst_static_pad_template_get_caps (GstStaticPadTemplate * templ)
|
|
{
|
|
g_return_val_if_fail (templ, NULL);
|
|
|
|
return (GstCaps *) gst_static_caps_get (&templ->static_caps);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_template_get_caps:
|
|
* @templ: a #GstPadTemplate to get capabilities of.
|
|
*
|
|
* Gets the capabilities of the pad template.
|
|
*
|
|
* Returns: the #GstCaps of the pad template. If you need to keep a reference to
|
|
* the caps, take a ref (see gst_caps_ref ()).
|
|
*/
|
|
GstCaps *
|
|
gst_pad_template_get_caps (GstPadTemplate * templ)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD_TEMPLATE (templ), NULL);
|
|
|
|
return GST_PAD_TEMPLATE_CAPS (templ);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_element_private:
|
|
* @pad: the #GstPad to set the private data of.
|
|
* @priv: The private data to attach to the pad.
|
|
*
|
|
* Set the given private data gpointer on the pad.
|
|
* This function can only be used by the element that owns the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_element_private (GstPad * pad, gpointer priv)
|
|
{
|
|
pad->element_private = priv;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_element_private:
|
|
* @pad: the #GstPad to get the private data of.
|
|
*
|
|
* Gets the private data of a pad.
|
|
*
|
|
* Returns: a #gpointer to the private data.
|
|
*/
|
|
gpointer
|
|
gst_pad_get_element_private (GstPad * pad)
|
|
{
|
|
return pad->element_private;
|
|
}
|
|
|
|
gboolean
|
|
gst_pad_start_task (GstPad * pad)
|
|
{
|
|
g_warning ("implement gst_pad_start_task()");
|
|
return FALSE;
|
|
}
|
|
|
|
gboolean
|
|
gst_pad_pause_task (GstPad * pad)
|
|
{
|
|
g_warning ("implement gst_pad_pause_task()");
|
|
return FALSE;
|
|
}
|
|
|
|
gboolean
|
|
gst_pad_stop_task (GstPad * pad)
|
|
{
|
|
g_warning ("implement gst_pad_stop_task()");
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***** ghost pads *****/
|
|
GType _gst_ghost_pad_type = 0;
|
|
|
|
static void gst_ghost_pad_class_init (GstGhostPadClass * klass);
|
|
static void gst_ghost_pad_init (GstGhostPad * pad);
|
|
static void gst_ghost_pad_dispose (GObject * object);
|
|
static void gst_ghost_pad_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
static void gst_ghost_pad_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec);
|
|
|
|
static GstPad *ghost_pad_parent_class = NULL;
|
|
|
|
/* static guint gst_ghost_pad_signals[LAST_SIGNAL] = { 0 }; */
|
|
enum
|
|
{
|
|
GPAD_ARG_0,
|
|
GPAD_ARG_REAL_PAD
|
|
/* fill me */
|
|
};
|
|
|
|
GType
|
|
gst_ghost_pad_get_type (void)
|
|
{
|
|
if (!_gst_ghost_pad_type) {
|
|
static const GTypeInfo pad_info = {
|
|
sizeof (GstGhostPadClass), NULL, NULL,
|
|
(GClassInitFunc) gst_ghost_pad_class_init, NULL, NULL,
|
|
sizeof (GstGhostPad),
|
|
0,
|
|
(GInstanceInitFunc) gst_ghost_pad_init,
|
|
NULL
|
|
};
|
|
|
|
_gst_ghost_pad_type = g_type_register_static (GST_TYPE_PAD, "GstGhostPad",
|
|
&pad_info, 0);
|
|
}
|
|
return _gst_ghost_pad_type;
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_class_init (GstGhostPadClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
|
|
ghost_pad_parent_class = g_type_class_ref (GST_TYPE_PAD);
|
|
|
|
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_ghost_pad_dispose);
|
|
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_ghost_pad_set_property);
|
|
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_ghost_pad_get_property);
|
|
|
|
g_object_class_install_property (gobject_class, GPAD_ARG_REAL_PAD,
|
|
g_param_spec_object ("real-pad", "Real pad",
|
|
"The real pad for the ghost pad", GST_TYPE_PAD, G_PARAM_READWRITE));
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_init (GstGhostPad * pad)
|
|
{
|
|
/* zeroed by glib */
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_dispose (GObject * object)
|
|
{
|
|
g_object_set (object, "real-pad", NULL, NULL);
|
|
|
|
G_OBJECT_CLASS (ghost_pad_parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstPad *ghostpad = (GstPad *) object;
|
|
GstPad *oldrealpad = (GstPad *) GST_GPAD_REALPAD (ghostpad);
|
|
GstPad *realpad = NULL;
|
|
|
|
switch (prop_id) {
|
|
case GPAD_ARG_REAL_PAD:
|
|
realpad = g_value_get_object (value);
|
|
|
|
if (oldrealpad) {
|
|
if (realpad == oldrealpad)
|
|
return;
|
|
else
|
|
gst_pad_remove_ghost_pad (oldrealpad, ghostpad);
|
|
}
|
|
|
|
if (realpad)
|
|
gst_pad_add_ghost_pad (realpad, ghostpad);
|
|
break;
|
|
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
switch (prop_id) {
|
|
case GPAD_ARG_REAL_PAD:
|
|
g_value_set_object (value, GST_GPAD_REALPAD (object));
|
|
break;
|
|
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_ghost_pad_new:
|
|
* @name: the name of the new ghost pad.
|
|
* @pad: the #GstPad to create a ghost pad for.
|
|
*
|
|
* Creates a new ghost pad associated with @pad, and named @name. If @name is
|
|
* %NULL, a guaranteed unique name (across all ghost pads) will be assigned.
|
|
*
|
|
* Returns: a new ghost #GstPad, or %NULL in case of an error.
|
|
*/
|
|
GstPad *
|
|
gst_ghost_pad_new (const gchar * name, GstPad * pad)
|
|
{
|
|
GstPad *gpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
gpad = g_object_new (GST_TYPE_GHOST_PAD, "name", name, "real-pad", pad, NULL);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "created ghost pad \"%s\" for pad %s:%s",
|
|
GST_OBJECT_NAME (gpad), GST_DEBUG_PAD_NAME (pad));
|
|
|
|
return gpad;
|
|
}
|