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4013 lines
109 KiB
C
4013 lines
109 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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#define GST_CAT_DEFAULT GST_CAT_PADS
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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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static GstCaps *_gst_pad_default_fixate_func (GstPad * pad,
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const GstCaps * caps);
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static gboolean gst_pad_link_try (GstPadLink * link);
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static void gst_pad_link_free (GstPadLink * link);
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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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32,
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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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}
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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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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_FIXATE,
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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 gboolean _gst_real_pad_fixate_accumulator (GSignalInvocationHint * ihint,
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GValue * return_accu, const GValue * handler_return, gpointer dummy);
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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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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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32,
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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->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_FIXATE] =
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g_signal_new ("fixate", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstRealPadClass, appfixatefunc),
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_gst_real_pad_fixate_accumulator, NULL,
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gst_marshal_BOXED__BOXED, GST_TYPE_CAPS, 1,
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GST_TYPE_CAPS | G_SIGNAL_TYPE_STATIC_SCOPE);
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/* gtk_object_add_arg_type ("GstRealPad::active", G_TYPE_BOOLEAN, */
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/* GTK_ARG_READWRITE, REAL_ARG_ACTIVE); */
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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 gboolean
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_gst_real_pad_fixate_accumulator (GSignalInvocationHint * ihint,
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GValue * return_accu, const GValue * handler_return, gpointer dummy)
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{
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if (gst_value_get_caps (handler_return)) {
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g_value_copy (handler_return, return_accu);
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/* stop emission if something was returned */
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return FALSE;
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}
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return TRUE;
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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->getfunc = NULL;
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pad->chainhandler = NULL;
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pad->gethandler = 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->convertfunc = gst_pad_convert_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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pad->eventmaskfunc = gst_pad_get_event_masks_default;
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pad->formatsfunc = gst_pad_get_formats_default;
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pad->querytypefunc = gst_pad_get_query_types_default;
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GST_FLAG_SET (pad, GST_PAD_DISABLED);
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GST_FLAG_UNSET (pad, GST_PAD_NEGOTIATING);
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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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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_DISABLED));
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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 */
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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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*
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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 (GType type, const gchar * name, GstPadDirection direction)
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{
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GstRealPad *pad;
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g_return_val_if_fail (direction != GST_PAD_UNKNOWN, NULL);
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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 (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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*
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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 (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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*
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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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*
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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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/* FIXME 0.9: GST_PAD_UNKNOWN needs to die! */
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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.
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*
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* Returns: the #GstPadDirection of the pad.
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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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g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_UNKNOWN);
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if (GST_IS_REAL_PAD (pad))
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return GST_PAD_DIRECTION (pad);
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else
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return GST_PAD_UNKNOWN;
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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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* @active: TRUE to activate the pad.
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*
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* Activates or deactivates the given pad.
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*/
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void
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gst_pad_set_active (GstPad * pad, gboolean active)
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{
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GstRealPad *realpad;
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gboolean old;
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g_return_if_fail (GST_IS_PAD (pad));
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old = GST_PAD_IS_ACTIVE (pad);
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if (old == active)
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return;
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realpad = GST_PAD_REALIZE (pad);
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if (active) {
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GST_CAT_DEBUG (GST_CAT_PADS, "activating pad %s:%s",
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GST_DEBUG_PAD_NAME (realpad));
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GST_FLAG_UNSET (realpad, GST_PAD_DISABLED);
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} else {
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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_SET (realpad, GST_PAD_DISABLED);
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}
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g_object_notify (G_OBJECT (realpad), "active");
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}
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/**
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* gst_pad_is_active:
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* @pad: the #GstPad to query
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*
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* Query if a pad is active
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*
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* Returns: TRUE if the pad is active.
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*/
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gboolean
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gst_pad_is_active (GstPad * pad)
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{
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g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
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return !GST_FLAG_IS_SET (pad, GST_PAD_DISABLED);
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}
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/**
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* gst_pad_set_name:
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* @pad: a #GstPad to set the name of.
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* @name: the name of the pad.
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*
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* Sets the name of a pad. If name is NULL, then a guaranteed unique
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* name will be assigned.
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*/
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void
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gst_pad_set_name (GstPad * pad, const gchar * name)
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{
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g_return_if_fail (GST_IS_PAD (pad));
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gst_object_set_name (GST_OBJECT (pad), name);
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}
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/* FIXME 0.9: This function must die */
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/**
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* gst_pad_get_name:
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* @pad: a #GstPad to get the name of.
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*
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* Gets the name of a pad.
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*
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* Returns: the name of the pad. This is not a newly allocated pointer
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* so you must not free it.
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*/
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const gchar *
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gst_pad_get_name (GstPad * pad)
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{
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g_return_val_if_fail (GST_IS_PAD (pad), NULL);
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return GST_OBJECT_NAME (pad);
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}
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/**
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* gst_pad_set_chain_function:
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* @pad: a real sink #GstPad.
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* @chain: the #GstPadChainFunction to set.
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*
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* Sets the given chain function for the pad. The chain function is called to
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* process a #GstData input buffer.
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*/
|
|
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_get_function:
|
|
* @pad: a real source #GstPad.
|
|
* @get: the #GstPadGetFunction to set.
|
|
*
|
|
* Sets the given get function for the pad. The get function is called to
|
|
* produce a new #GstData to start the processing pipeline. Get functions cannot
|
|
* return %NULL.
|
|
*/
|
|
void
|
|
gst_pad_set_get_function (GstPad * pad, GstPadGetFunction get)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
g_return_if_fail (GST_RPAD_DIRECTION (pad) == GST_PAD_SRC);
|
|
|
|
GST_RPAD_GETFUNC (pad) = get;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "getfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (get));
|
|
}
|
|
|
|
/**
|
|
* 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));
|
|
g_return_if_fail (GST_RPAD_DIRECTION (pad) == GST_PAD_SRC);
|
|
|
|
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_event_mask_function:
|
|
* @pad: a real #GstPad of either direction.
|
|
* @mask_func: the #GstPadEventMaskFunction to set.
|
|
*
|
|
* Sets the given event mask function for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_event_mask_function (GstPad * pad,
|
|
GstPadEventMaskFunction mask_func)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_EVENTMASKFUNC (pad) = mask_func;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "eventmaskfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (mask_func));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_event_masks:
|
|
* @pad: a #GstPad.
|
|
*
|
|
* Gets the array of eventmasks from the given pad.
|
|
*
|
|
* Returns: a zero-terminated array of #GstEventMask, or NULL if the pad does
|
|
* not have an event mask function.
|
|
*/
|
|
const GstEventMask *
|
|
gst_pad_get_event_masks (GstPad * pad)
|
|
{
|
|
GstRealPad *rpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
g_return_val_if_fail (rpad, FALSE);
|
|
|
|
if (GST_RPAD_EVENTMASKFUNC (rpad))
|
|
return GST_RPAD_EVENTMASKFUNC (rpad) (GST_PAD (pad));
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_get_event_masks_dispatcher (GstPad * pad, const GstEventMask ** data)
|
|
{
|
|
*data = gst_pad_get_event_masks (pad);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_event_masks_default:
|
|
* @pad: a #GstPad.
|
|
*
|
|
* Invokes the default event masks dispatcher on the pad.
|
|
*
|
|
* Returns: a zero-terminated array of #GstEventMask, or NULL if none of the
|
|
* internally-linked pads have an event mask function.
|
|
*/
|
|
const GstEventMask *
|
|
gst_pad_get_event_masks_default (GstPad * pad)
|
|
{
|
|
GstEventMask *result = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
gst_pad_dispatcher (pad, (GstPadDispatcherFunction)
|
|
gst_pad_get_event_masks_dispatcher, &result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_convert_function:
|
|
* @pad: a real #GstPad of either direction.
|
|
* @convert: the #GstPadConvertFunction to set.
|
|
*
|
|
* Sets the given convert function for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_convert_function (GstPad * pad, GstPadConvertFunction convert)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_CONVERTFUNC (pad) = convert;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "convertfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (convert));
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
g_return_val_if_fail (rpad, NULL);
|
|
|
|
if (GST_RPAD_QUERYTYPEFUNC (rpad))
|
|
return GST_RPAD_QUERYTYPEFUNC (rpad) (GST_PAD (pad));
|
|
|
|
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_formats_function:
|
|
* @pad: a real #GstPad of either direction.
|
|
* @formats: the #GstPadFormatsFunction to set.
|
|
*
|
|
* Sets the given formats function for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_formats_function (GstPad * pad, GstPadFormatsFunction formats)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_FORMATSFUNC (pad) = formats;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "formats function for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (formats));
|
|
}
|
|
|
|
/**
|
|
* 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 are
|
|
* guaranteed to be fixed. This means that you can assume that the caps is not
|
|
* ANY or EMPTY, and that there is exactly one structure in the caps, and that
|
|
* all the fields in the structure are fixed.
|
|
*
|
|
* The return value GST_PAD_LINK_OK should be used when the caps are acceptable,
|
|
* and you've extracted all the necessary information from the caps and set the
|
|
* element's internal state appropriately.
|
|
*
|
|
* The return value GST_PAD_LINK_REFUSED should be used when the caps are
|
|
* unacceptable for whatever reason.
|
|
*
|
|
* The return value GST_PAD_LINK_DELAYED should be used when the element is in a
|
|
* state where it can't determine whether the caps are acceptable or not. This
|
|
* is often used if the element needs to open a device or process data before
|
|
* determining acceptable caps.
|
|
*
|
|
* @link must not call gst_caps_try_set_caps() on the pad that was specified as
|
|
* a parameter, although it may (and often should) call gst_caps_try_set_caps()
|
|
* on other pads.
|
|
*/
|
|
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_fixate_function:
|
|
* @pad: a real #GstPad.
|
|
* @fixate: the #GstPadFixateFunction to set.
|
|
*
|
|
* Sets the given fixate function for the pad. Its job is to narrow down the
|
|
* possible caps for a connection. Fixate functions are called with a const
|
|
* caps, and should return a caps that is a strict subset of the given caps.
|
|
* That is, @fixate should create a caps that is "more fixed" than previously,
|
|
* but it does not have to return fixed caps. If @fixate can't provide more
|
|
* fixed caps, it should return %NULL.
|
|
*
|
|
* Note that @fixate will only be called after the "fixate" signal is emitted,
|
|
* and only if the caps are still non-fixed.
|
|
*/
|
|
void
|
|
gst_pad_set_fixate_function (GstPad * pad, GstPadFixateFunction fixate)
|
|
{
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_FIXATEFUNC (pad) = fixate;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "fixatefunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (fixate));
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* 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. However, the returned caps should not depend on the
|
|
* stream type currently negotiated for @pad.
|
|
*
|
|
* Note that the return value from @getcaps is owned by the caller.
|
|
*/
|
|
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_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));
|
|
}
|
|
|
|
/* FIXME 0.9: Do we actually want to allow the case where src and sink are
|
|
switched? */
|
|
/**
|
|
* 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.
|
|
*/
|
|
void
|
|
gst_pad_unlink (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
GstScheduler *src_sched, *sink_sched;
|
|
|
|
g_return_if_fail (GST_IS_PAD (srcpad));
|
|
g_return_if_fail (GST_IS_PAD (sinkpad));
|
|
|
|
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);
|
|
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
g_return_if_fail (GST_RPAD_PEER (realsrc) != NULL);
|
|
g_return_if_fail (GST_RPAD_PEER (realsink) == realsrc);
|
|
|
|
if ((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SINK) &&
|
|
(GST_RPAD_DIRECTION (realsink) == GST_PAD_SRC)) {
|
|
GstRealPad *temppad;
|
|
|
|
temppad = realsrc;
|
|
realsrc = realsink;
|
|
realsink = temppad;
|
|
}
|
|
g_return_if_fail ((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) &&
|
|
(GST_RPAD_DIRECTION (realsink) == GST_PAD_SINK));
|
|
|
|
if (GST_RPAD_UNLINKFUNC (realsrc)) {
|
|
GST_RPAD_UNLINKFUNC (realsrc) (GST_PAD (realsrc));
|
|
}
|
|
if (GST_RPAD_UNLINKFUNC (realsink)) {
|
|
GST_RPAD_UNLINKFUNC (realsink) (GST_PAD (realsink));
|
|
}
|
|
|
|
/* get the schedulers before we unlink */
|
|
src_sched = gst_pad_get_scheduler (GST_PAD (realsrc));
|
|
sink_sched = gst_pad_get_scheduler (GST_PAD (realsink));
|
|
|
|
if (GST_RPAD_LINK (realsrc))
|
|
gst_pad_link_free (GST_RPAD_LINK (realsrc));
|
|
|
|
/* first clear peers */
|
|
GST_RPAD_PEER (realsrc) = NULL;
|
|
GST_RPAD_PEER (realsink) = NULL;
|
|
GST_RPAD_LINK (realsrc) = NULL;
|
|
GST_RPAD_LINK (realsink) = NULL;
|
|
|
|
/* now tell the scheduler */
|
|
if (src_sched && src_sched == sink_sched) {
|
|
gst_scheduler_pad_unlink (src_sched, GST_PAD (realsrc), GST_PAD (realsink));
|
|
}
|
|
|
|
/* hold a reference, as they can go away in the signal handlers */
|
|
gst_object_ref (GST_OBJECT (realsrc));
|
|
gst_object_ref (GST_OBJECT (realsink));
|
|
|
|
/* 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 (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
|
|
gst_object_unref (GST_OBJECT (realsrc));
|
|
gst_object_unref (GST_OBJECT (realsink));
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
gboolean
|
|
gst_pad_is_linked (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
return GST_PAD_PEER (pad) != NULL;
|
|
}
|
|
|
|
struct _GstPadLink
|
|
{
|
|
GType type;
|
|
|
|
gboolean bla;
|
|
gboolean srcnotify;
|
|
gboolean sinknotify;
|
|
|
|
GstPad *srcpad;
|
|
GstPad *sinkpad;
|
|
|
|
GstCaps *srccaps;
|
|
GstCaps *sinkcaps;
|
|
GstCaps *filtercaps;
|
|
GstCaps *caps;
|
|
|
|
GstPadFixateFunction app_fixate;
|
|
};
|
|
|
|
static gboolean
|
|
gst_pad_check_schedulers (GstRealPad * realsrc, GstRealPad * realsink)
|
|
{
|
|
GstScheduler *src_sched, *sink_sched;
|
|
gint num_decoupled = 0;
|
|
|
|
src_sched = gst_pad_get_scheduler (GST_PAD (realsrc));
|
|
sink_sched = gst_pad_get_scheduler (GST_PAD (realsink));
|
|
|
|
if (src_sched && sink_sched) {
|
|
if (GST_FLAG_IS_SET (GST_PAD_PARENT (realsrc), GST_ELEMENT_DECOUPLED))
|
|
num_decoupled++;
|
|
if (GST_FLAG_IS_SET (GST_PAD_PARENT (realsink), GST_ELEMENT_DECOUPLED))
|
|
num_decoupled++;
|
|
|
|
if (src_sched != sink_sched && num_decoupled != 1) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
#define GST_PAD_LINK_SRC(pad) ((GST_PAD_IS_SRC (pad)) ? (pad) : GST_PAD_PEER (pad))
|
|
#define GST_PAD_LINK_SINK(pad) ((GST_PAD_IS_SINK (pad)) ? (pad) : GST_PAD_PEER (pad))
|
|
|
|
static GstPadLink *
|
|
gst_pad_link_new (void)
|
|
{
|
|
GstPadLink *link;
|
|
|
|
link = g_new0 (GstPadLink, 1);
|
|
link->sinknotify = TRUE;
|
|
link->srcnotify = TRUE;
|
|
return link;
|
|
}
|
|
|
|
static void
|
|
gst_pad_link_free (GstPadLink * link)
|
|
{
|
|
if (link->srccaps)
|
|
gst_caps_free (link->srccaps);
|
|
if (link->sinkcaps)
|
|
gst_caps_free (link->sinkcaps);
|
|
if (link->filtercaps)
|
|
gst_caps_free (link->filtercaps);
|
|
if (link->caps)
|
|
gst_caps_free (link->caps);
|
|
#ifdef USE_POISONING
|
|
memset (link, 0xff, sizeof (*link));
|
|
#endif
|
|
g_free (link);
|
|
}
|
|
|
|
static void
|
|
gst_pad_link_intersect (GstPadLink * link)
|
|
{
|
|
GstCaps *pad_intersection;
|
|
|
|
if (link->caps)
|
|
gst_caps_free (link->caps);
|
|
|
|
GST_DEBUG ("intersecting link from %s:%s to %s:%s",
|
|
GST_DEBUG_PAD_NAME (link->srcpad), GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
GST_DEBUG ("... srccaps %" GST_PTR_FORMAT, link->srccaps);
|
|
GST_DEBUG ("... sinkcaps %" GST_PTR_FORMAT, link->sinkcaps);
|
|
GST_DEBUG ("... filtercaps %" GST_PTR_FORMAT, link->filtercaps);
|
|
|
|
pad_intersection = gst_caps_intersect (link->srccaps, link->sinkcaps);
|
|
|
|
if (link->filtercaps) {
|
|
GST_DEBUG ("unfiltered intersection %" GST_PTR_FORMAT, pad_intersection);
|
|
link->caps = gst_caps_intersect (pad_intersection, link->filtercaps);
|
|
gst_caps_free (pad_intersection);
|
|
} else {
|
|
link->caps = pad_intersection;
|
|
}
|
|
|
|
GST_DEBUG ("intersection %" GST_PTR_FORMAT, link->caps);
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_link_ready_for_negotiation (GstPadLink * link)
|
|
{
|
|
GstElement *parent;
|
|
|
|
parent = GST_PAD_PARENT (link->srcpad);
|
|
if (!parent || GST_STATE (parent) < GST_STATE_READY) {
|
|
GST_DEBUG ("parent %s of pad %s:%s is not READY",
|
|
GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (link->srcpad));
|
|
return FALSE;
|
|
}
|
|
parent = GST_PAD_PARENT (link->sinkpad);
|
|
if (!parent || GST_STATE (parent) < GST_STATE_READY) {
|
|
GST_DEBUG ("parent %s of pad %s:%s is not READY",
|
|
GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_pad_link_fixate (GstPadLink * link)
|
|
{
|
|
GstCaps *caps;
|
|
GstCaps *newcaps;
|
|
|
|
caps = link->caps;
|
|
|
|
g_return_if_fail (caps != NULL);
|
|
g_return_if_fail (!gst_caps_is_empty (caps));
|
|
|
|
GST_DEBUG ("trying to fixate caps %" GST_PTR_FORMAT, caps);
|
|
|
|
while (!gst_caps_is_fixed (caps)) {
|
|
int i;
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
newcaps = NULL;
|
|
switch (i) {
|
|
case 0:
|
|
g_signal_emit (G_OBJECT (link->srcpad),
|
|
gst_real_pad_signals[REAL_FIXATE], 0, caps, &newcaps);
|
|
GST_DEBUG ("app srcpad signal fixated to %" GST_PTR_FORMAT, newcaps);
|
|
break;
|
|
case 1:
|
|
g_signal_emit (G_OBJECT (link->sinkpad),
|
|
gst_real_pad_signals[REAL_FIXATE], 0, caps, &newcaps);
|
|
GST_DEBUG ("app sinkpad signal fixated to %" GST_PTR_FORMAT, newcaps);
|
|
break;
|
|
case 2:
|
|
if (GST_RPAD_FIXATEFUNC (link->srcpad)) {
|
|
newcaps =
|
|
GST_RPAD_FIXATEFUNC (link->srcpad) (GST_PAD (link->srcpad),
|
|
caps);
|
|
GST_DEBUG ("srcpad %s:%s fixated to %" GST_PTR_FORMAT,
|
|
GST_DEBUG_PAD_NAME (link->srcpad), newcaps);
|
|
} else
|
|
GST_DEBUG ("srcpad %s:%s doesn't have a fixate function",
|
|
GST_DEBUG_PAD_NAME (link->srcpad));
|
|
|
|
break;
|
|
case 3:
|
|
if (GST_RPAD_FIXATEFUNC (link->sinkpad)) {
|
|
newcaps =
|
|
GST_RPAD_FIXATEFUNC (link->sinkpad) (GST_PAD (link->sinkpad),
|
|
caps);
|
|
GST_DEBUG ("sinkpad %s:%s fixated to %" GST_PTR_FORMAT,
|
|
GST_DEBUG_PAD_NAME (link->sinkpad), newcaps);
|
|
} else
|
|
GST_DEBUG ("sinkpad %s:%s doesn't have a fixate function",
|
|
GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
break;
|
|
case 4:
|
|
newcaps = _gst_pad_default_fixate_func (GST_PAD (link->srcpad), caps);
|
|
GST_DEBUG ("core fixated to %" GST_PTR_FORMAT, newcaps);
|
|
break;
|
|
}
|
|
if (newcaps) {
|
|
gst_caps_free (caps);
|
|
caps = newcaps;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
link->caps = caps;
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_pad_link_call_link_functions (GstPadLink * link)
|
|
{
|
|
gboolean negotiating;
|
|
GstPadLinkReturn res;
|
|
|
|
if (link->srcnotify && GST_RPAD_LINKFUNC (link->srcpad)) {
|
|
GST_DEBUG ("calling link function on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (link->srcpad));
|
|
|
|
negotiating = GST_FLAG_IS_SET (link->srcpad, GST_PAD_NEGOTIATING);
|
|
|
|
/* set the NEGOTIATING flag if not already done */
|
|
if (!negotiating)
|
|
GST_FLAG_SET (link->srcpad, GST_PAD_NEGOTIATING);
|
|
|
|
/* call the link function */
|
|
res = GST_RPAD_LINKFUNC (link->srcpad) (GST_PAD (link->srcpad), link->caps);
|
|
|
|
/* unset again after negotiating only if we set it */
|
|
if (!negotiating)
|
|
GST_FLAG_UNSET (link->srcpad, GST_PAD_NEGOTIATING);
|
|
|
|
GST_DEBUG ("got reply %d from link function on pad %s:%s",
|
|
res, GST_DEBUG_PAD_NAME (link->srcpad));
|
|
|
|
if (GST_PAD_LINK_FAILED (res)) {
|
|
GST_CAT_INFO (GST_CAT_CAPS, "pad %s:%s doesn't accept caps",
|
|
GST_DEBUG_PAD_NAME (link->srcpad));
|
|
return res;
|
|
}
|
|
}
|
|
|
|
if (link->sinknotify && GST_RPAD_LINKFUNC (link->sinkpad)) {
|
|
GST_DEBUG ("calling link function on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
|
|
negotiating = GST_FLAG_IS_SET (link->sinkpad, GST_PAD_NEGOTIATING);
|
|
|
|
/* set the NEGOTIATING flag if not already done */
|
|
if (!negotiating)
|
|
GST_FLAG_SET (link->sinkpad, GST_PAD_NEGOTIATING);
|
|
|
|
/* call the link function */
|
|
res = GST_RPAD_LINKFUNC (link->sinkpad) (GST_PAD (link->sinkpad),
|
|
link->caps);
|
|
|
|
/* unset again after negotiating only if we set it */
|
|
if (!negotiating)
|
|
GST_FLAG_UNSET (link->sinkpad, GST_PAD_NEGOTIATING);
|
|
|
|
GST_DEBUG ("got reply %d from link function on pad %s:%s",
|
|
res, GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
|
|
if (GST_PAD_LINK_FAILED (res)) {
|
|
GST_CAT_INFO (GST_CAT_CAPS, "pad %s:%s doesn't accept caps",
|
|
GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
return res;
|
|
}
|
|
}
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_pad_link_negotiate (GstPadLink * link)
|
|
{
|
|
GST_DEBUG ("negotiating link from pad %s:%s to pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (link->srcpad), GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
|
|
if (!gst_pad_link_ready_for_negotiation (link)) {
|
|
return GST_PAD_LINK_DELAYED;
|
|
}
|
|
|
|
gst_pad_link_intersect (link);
|
|
if (gst_caps_is_empty (link->caps))
|
|
return GST_PAD_LINK_REFUSED;
|
|
|
|
gst_pad_link_fixate (link);
|
|
if (gst_caps_is_empty (link->caps))
|
|
return GST_PAD_LINK_REFUSED;
|
|
|
|
return gst_pad_link_call_link_functions (link);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_link_try:
|
|
* @link: link to try
|
|
*
|
|
* Tries to (re)link the pads with the given link. The function takes ownership
|
|
* of the supplied link. If the function returns FALSE and an old link existed,
|
|
* that link can be assumed to work unchanged.
|
|
*
|
|
* Returns: TRUE if the link succeeded, FALSE if not.
|
|
*/
|
|
static gboolean
|
|
gst_pad_link_try (GstPadLink * link)
|
|
{
|
|
GstPad *srcpad, *sinkpad;
|
|
GstPadLink *oldlink;
|
|
GstPadLinkReturn ret;
|
|
|
|
/* we use assertions here, because this function is static */
|
|
g_assert (link);
|
|
srcpad = link->srcpad;
|
|
g_assert (srcpad);
|
|
sinkpad = link->sinkpad;
|
|
g_assert (sinkpad);
|
|
oldlink = GST_RPAD_LINK (srcpad);
|
|
g_assert (oldlink == GST_RPAD_LINK (sinkpad));
|
|
|
|
ret = gst_pad_link_negotiate (link);
|
|
if (GST_PAD_LINK_FAILED (ret) && oldlink && oldlink->caps) {
|
|
oldlink->srcnotify = link->srcnotify;
|
|
oldlink->sinknotify = link->sinknotify;
|
|
if (GST_PAD_LINK_FAILED (gst_pad_link_call_link_functions (oldlink))) {
|
|
g_warning ("pads don't accept old caps. We assume they did though");
|
|
}
|
|
}
|
|
if (ret == GST_PAD_LINK_REFUSED) {
|
|
gst_pad_link_free (link);
|
|
return ret;
|
|
}
|
|
if (ret == GST_PAD_LINK_DELAYED) {
|
|
gst_caps_replace (&link->caps, NULL);
|
|
}
|
|
|
|
GST_RPAD_PEER (srcpad) = GST_REAL_PAD (link->sinkpad);
|
|
GST_RPAD_PEER (sinkpad) = GST_REAL_PAD (link->srcpad);
|
|
if (oldlink)
|
|
gst_pad_link_free (oldlink);
|
|
GST_RPAD_LINK (srcpad) = link;
|
|
GST_RPAD_LINK (sinkpad) = link;
|
|
if (ret == GST_PAD_LINK_OK) {
|
|
g_object_notify (G_OBJECT (srcpad), "caps");
|
|
g_object_notify (G_OBJECT (sinkpad), "caps");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_renegotiate:
|
|
* @pad: a #GstPad
|
|
*
|
|
* Initiate caps negotiation on @pad. @pad must be linked.
|
|
*
|
|
* If @pad's parent is not at least in #GST_STATE_READY, returns
|
|
* #GST_PAD_LINK_DELAYED.
|
|
*
|
|
* Otherwise caps are retrieved from both @pad and its peer by calling their
|
|
* getcaps functions. They are then intersected, returning #GST_PAD_LINK_FAIL if
|
|
* there is no intersection.
|
|
*
|
|
* The intersection is fixated if necessary, and then the link functions of @pad
|
|
* and its peer are called.
|
|
*
|
|
* Returns: The return value of @pad's link function (see
|
|
* gst_pad_set_link_function()), or #GST_PAD_LINK_OK if there is no link
|
|
* function.
|
|
*
|
|
* The macros GST_PAD_LINK_SUCCESSFUL() and GST_PAD_LINK_FAILED() should be used
|
|
* when you just need success/failure information.
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_renegotiate (GstPad * pad)
|
|
{
|
|
GstPadLink *link;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (GST_PAD_LINK_SRC (pad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (GST_PAD_LINK_SINK (pad), GST_PAD_LINK_REFUSED);
|
|
|
|
link = gst_pad_link_new ();
|
|
|
|
link->srcpad = GST_PAD_LINK_SRC (pad);
|
|
link->sinkpad = GST_PAD_LINK_SINK (pad);
|
|
|
|
if (!gst_pad_link_ready_for_negotiation (link)) {
|
|
gst_pad_link_free (link);
|
|
return GST_PAD_LINK_DELAYED;
|
|
}
|
|
|
|
if (GST_REAL_PAD (pad)->link->filtercaps) {
|
|
link->filtercaps = gst_caps_copy (GST_REAL_PAD (pad)->link->filtercaps);
|
|
}
|
|
link->srccaps = gst_pad_get_caps (link->srcpad);
|
|
link->sinkcaps = gst_pad_get_caps (link->sinkpad);
|
|
|
|
return gst_pad_link_try (link);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_try_set_caps:
|
|
* @pad: a #GstPad
|
|
* @caps: #GstCaps to set on @pad
|
|
*
|
|
* Try to set the caps on @pad. @caps must be fixed. If @pad is unlinked,
|
|
* returns #GST_PAD_LINK_OK without doing anything. Otherwise, start caps
|
|
* negotiation on @pad.
|
|
*
|
|
* Returns: The return value of @pad's link function (see
|
|
* gst_pad_set_link_function()), or #GST_PAD_LINK_OK if there is no link
|
|
* function.
|
|
*
|
|
* The macros GST_PAD_LINK_SUCCESSFUL() and GST_PAD_LINK_FAILED() should be used
|
|
* when you just need success/failure information.
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_try_set_caps (GstPad * pad, const GstCaps * caps)
|
|
{
|
|
GstPadLink *link;
|
|
GstPadLink *oldlink;
|
|
GstPadLinkReturn ret;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (!GST_PAD_IS_NEGOTIATING (pad), GST_PAD_LINK_REFUSED);
|
|
|
|
/* setting non-fixed caps on a pad is not allowed */
|
|
if (!gst_caps_is_fixed (caps)) {
|
|
GST_CAT_INFO (GST_CAT_CAPS,
|
|
"trying to set unfixed caps on pad %s:%s, not allowed",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
g_warning ("trying to set non fixed caps on pad %s:%s, not allowed",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
GST_DEBUG ("unfixed caps %" GST_PTR_FORMAT, caps);
|
|
return GST_PAD_LINK_REFUSED;
|
|
}
|
|
|
|
/* we allow setting caps on non-linked pads. It's ignored */
|
|
if (!GST_PAD_PEER (pad)) {
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
g_return_val_if_fail (GST_PAD_LINK_SRC (pad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (GST_PAD_LINK_SINK (pad), GST_PAD_LINK_REFUSED);
|
|
|
|
/* if the desired caps are already there, it's trivially ok */
|
|
if (GST_PAD_CAPS (pad) && gst_caps_is_equal_fixed (caps, GST_PAD_CAPS (pad))) {
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
link = gst_pad_link_new ();
|
|
|
|
link->srcpad = GST_PAD_LINK_SRC (pad);
|
|
link->sinkpad = GST_PAD_LINK_SINK (pad);
|
|
|
|
if (!gst_pad_link_ready_for_negotiation (link)) {
|
|
gst_pad_link_free (link);
|
|
return GST_PAD_LINK_DELAYED;
|
|
}
|
|
|
|
oldlink = GST_REAL_PAD (pad)->link;
|
|
if (oldlink && oldlink->filtercaps) {
|
|
link->filtercaps = gst_caps_copy (oldlink->filtercaps);
|
|
}
|
|
if (link->srcpad == pad) {
|
|
link->srccaps = gst_caps_copy (caps);
|
|
link->sinkcaps = gst_pad_get_caps (link->sinkpad);
|
|
link->srcnotify = FALSE;
|
|
} else {
|
|
link->srccaps = gst_pad_get_caps (link->srcpad);
|
|
link->sinkcaps = gst_caps_copy (caps);
|
|
link->sinknotify = FALSE;
|
|
}
|
|
|
|
ret = gst_pad_link_try (link);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_try_set_caps_nonfixed:
|
|
* @pad: a real #GstPad
|
|
* @caps: #GstCaps to set on @pad
|
|
*
|
|
* Like gst_pad_try_set_caps(), but allows non-fixed caps.
|
|
*
|
|
* Returns: a #GstPadLinkReturn, like gst_pad_try_set_caps().
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_try_set_caps_nonfixed (GstPad * pad, const GstCaps * caps)
|
|
{
|
|
GstPadLink *link;
|
|
GstPadLink *oldlink;
|
|
GstPadLinkReturn ret;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (!GST_PAD_IS_NEGOTIATING (pad), GST_PAD_LINK_REFUSED);
|
|
|
|
/* we allow setting caps on non-linked pads. It's ignored */
|
|
if (!GST_PAD_PEER (pad)) {
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
g_return_val_if_fail (GST_PAD_LINK_SRC (pad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (GST_PAD_LINK_SINK (pad), GST_PAD_LINK_REFUSED);
|
|
|
|
/* if the link is already negotiated and the caps are compatible
|
|
* with what we're setting, it's trivially OK. */
|
|
if (GST_PAD_CAPS (pad)) {
|
|
GstCaps *intersection;
|
|
|
|
intersection = gst_caps_intersect (caps, GST_PAD_CAPS (pad));
|
|
if (!gst_caps_is_empty (intersection)) {
|
|
gst_caps_free (intersection);
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
gst_caps_free (intersection);
|
|
}
|
|
|
|
link = gst_pad_link_new ();
|
|
|
|
link->srcpad = GST_PAD_LINK_SRC (pad);
|
|
link->sinkpad = GST_PAD_LINK_SINK (pad);
|
|
|
|
if (!gst_pad_link_ready_for_negotiation (link)) {
|
|
gst_pad_link_free (link);
|
|
return GST_PAD_LINK_DELAYED;
|
|
}
|
|
|
|
oldlink = GST_REAL_PAD (pad)->link;
|
|
if (oldlink && oldlink->filtercaps) {
|
|
link->filtercaps = gst_caps_copy (oldlink->filtercaps);
|
|
}
|
|
if (link->srcpad == pad) {
|
|
link->srccaps = gst_caps_copy (caps);
|
|
link->sinkcaps = gst_pad_get_caps (link->sinkpad);
|
|
link->srcnotify = FALSE;
|
|
} else {
|
|
link->srccaps = gst_pad_get_caps (link->srcpad);
|
|
link->sinkcaps = gst_caps_copy (caps);
|
|
link->sinknotify = FALSE;
|
|
}
|
|
|
|
ret = gst_pad_link_try (link);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_can_link_filtered:
|
|
* @srcpad: the source #GstPad to link.
|
|
* @sinkpad: the sink #GstPad to link.
|
|
* @filtercaps: the filter #GstCaps.
|
|
*
|
|
* Checks if the source pad and the sink pad can be linked when constrained
|
|
* by the given filter caps. Both @srcpad and @sinkpad must be unlinked.
|
|
*
|
|
* Returns: TRUE if the pads can be linked, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_can_link_filtered (GstPad * srcpad, GstPad * sinkpad,
|
|
const GstCaps * filtercaps)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
GstPadLink *link;
|
|
|
|
/* FIXME This function is gross. It's almost a direct copy of
|
|
* gst_pad_link_filtered(). Any decent programmer would attempt
|
|
* to merge the two functions, which I will do some day. --ds
|
|
*/
|
|
|
|
/* generic checks */
|
|
g_return_val_if_fail (srcpad != NULL, FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
|
|
g_return_val_if_fail (sinkpad != NULL, FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
|
|
|
|
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 */
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
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));
|
|
}
|
|
/* FIXME: shouldn't we convert this to g_return_val_if_fail? */
|
|
if (GST_RPAD_PEER (realsrc) != NULL) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real source pad %s:%s has a peer, failed",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
return FALSE;
|
|
}
|
|
if (GST_RPAD_PEER (realsink) != NULL) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s has a peer, failed",
|
|
GST_DEBUG_PAD_NAME (realsink));
|
|
return FALSE;
|
|
}
|
|
if (GST_PAD_PARENT (realsrc) == NULL) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real src pad %s:%s has no parent, failed",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
return FALSE;
|
|
}
|
|
if (GST_PAD_PARENT (realsink) == NULL) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s has no parent, failed",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_pad_check_schedulers (realsrc, realsink)) {
|
|
g_warning ("linking pads with different scheds requires "
|
|
"exactly one decoupled element (such as queue)");
|
|
return FALSE;
|
|
}
|
|
|
|
g_return_val_if_fail (realsrc != NULL, GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (realsink != NULL, GST_PAD_LINK_REFUSED);
|
|
|
|
link = gst_pad_link_new ();
|
|
|
|
if (GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) {
|
|
link->srcpad = GST_PAD (realsrc);
|
|
link->sinkpad = GST_PAD (realsink);
|
|
} else {
|
|
link->srcpad = GST_PAD (realsink);
|
|
link->sinkpad = GST_PAD (realsrc);
|
|
}
|
|
|
|
if (GST_RPAD_DIRECTION (link->srcpad) != GST_PAD_SRC) {
|
|
GST_CAT_INFO (GST_CAT_PADS,
|
|
"Real src pad %s:%s is not a source pad, failed",
|
|
GST_DEBUG_PAD_NAME (link->srcpad));
|
|
gst_pad_link_free (link);
|
|
return FALSE;
|
|
}
|
|
if (GST_RPAD_DIRECTION (link->sinkpad) != GST_PAD_SINK) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s is not a sink pad, failed",
|
|
GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
gst_pad_link_free (link);
|
|
return FALSE;
|
|
}
|
|
|
|
link->srccaps = gst_pad_get_caps (link->srcpad);
|
|
link->sinkcaps = gst_pad_get_caps (link->sinkpad);
|
|
if (filtercaps)
|
|
link->filtercaps = gst_caps_copy (filtercaps);
|
|
|
|
gst_pad_link_intersect (link);
|
|
if (gst_caps_is_empty (link->caps)) {
|
|
gst_pad_link_free (link);
|
|
return FALSE;
|
|
}
|
|
|
|
gst_pad_link_free (link);
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_can_link:
|
|
* @srcpad: the source #GstPad to link.
|
|
* @sinkpad: the sink #GstPad to link.
|
|
*
|
|
* Checks if the source pad and the sink pad can be linked.
|
|
*
|
|
* Returns: TRUE if the pads can be linked, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_can_link (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
return gst_pad_can_link_filtered (srcpad, sinkpad, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_link_filtered:
|
|
* @srcpad: the source #GstPad to link.
|
|
* @sinkpad: the sink #GstPad to link.
|
|
* @filtercaps: the filter #GstCaps.
|
|
*
|
|
* Links the source pad and the sink pad, constrained
|
|
* by the given filter caps.
|
|
*
|
|
* Returns: TRUE if the pads have been linked, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_link_filtered (GstPad * srcpad, GstPad * sinkpad,
|
|
const GstCaps * filtercaps)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
GstScheduler *src_sched, *sink_sched;
|
|
GstPadLink *link;
|
|
|
|
/* generic checks */
|
|
g_return_val_if_fail (srcpad != NULL, FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
|
|
g_return_val_if_fail (sinkpad != NULL, FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
|
|
|
|
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 */
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
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));
|
|
}
|
|
/* FIXME: shouldn't we convert this to g_return_val_if_fail? */
|
|
if (GST_RPAD_PEER (realsrc) != NULL) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real source pad %s:%s has a peer, failed",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
return FALSE;
|
|
}
|
|
if (GST_RPAD_PEER (realsink) != NULL) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s has a peer, failed",
|
|
GST_DEBUG_PAD_NAME (realsink));
|
|
return FALSE;
|
|
}
|
|
if (GST_PAD_PARENT (realsrc) == NULL) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real src pad %s:%s has no parent, failed",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
return FALSE;
|
|
}
|
|
if (GST_PAD_PARENT (realsink) == NULL) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s has no parent, failed",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_pad_check_schedulers (realsrc, realsink)) {
|
|
g_warning ("linking pads with different scheds requires "
|
|
"exactly one decoupled element (such as queue)");
|
|
return FALSE;
|
|
}
|
|
|
|
g_return_val_if_fail (realsrc != NULL, GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (realsink != NULL, GST_PAD_LINK_REFUSED);
|
|
|
|
link = gst_pad_link_new ();
|
|
|
|
if (GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) {
|
|
link->srcpad = GST_PAD (realsrc);
|
|
link->sinkpad = GST_PAD (realsink);
|
|
} else {
|
|
link->srcpad = GST_PAD (realsink);
|
|
link->sinkpad = GST_PAD (realsrc);
|
|
}
|
|
|
|
if (GST_RPAD_DIRECTION (link->srcpad) != GST_PAD_SRC) {
|
|
GST_CAT_INFO (GST_CAT_PADS,
|
|
"Real src pad %s:%s is not a source pad, failed",
|
|
GST_DEBUG_PAD_NAME (link->srcpad));
|
|
gst_pad_link_free (link);
|
|
return FALSE;
|
|
}
|
|
if (GST_RPAD_DIRECTION (link->sinkpad) != GST_PAD_SINK) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s is not a sink pad, failed",
|
|
GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
gst_pad_link_free (link);
|
|
return FALSE;
|
|
}
|
|
|
|
link->srccaps = gst_pad_get_caps (link->srcpad);
|
|
link->sinkcaps = gst_pad_get_caps (link->sinkpad);
|
|
if (filtercaps)
|
|
link->filtercaps = gst_caps_copy (filtercaps);
|
|
if (gst_pad_link_try (link) == GST_PAD_LINK_REFUSED)
|
|
return FALSE;
|
|
|
|
/* fire off a signal to each of the pads telling them
|
|
* that they've been linked */
|
|
g_signal_emit (G_OBJECT (link->srcpad), gst_real_pad_signals[REAL_LINKED],
|
|
0, link->sinkpad);
|
|
g_signal_emit (G_OBJECT (link->sinkpad), gst_real_pad_signals[REAL_LINKED],
|
|
0, link->srcpad);
|
|
|
|
src_sched = gst_pad_get_scheduler (GST_PAD (link->srcpad));
|
|
sink_sched = gst_pad_get_scheduler (GST_PAD (link->sinkpad));
|
|
|
|
/* now tell the scheduler */
|
|
if (src_sched && src_sched == sink_sched) {
|
|
gst_scheduler_pad_link (src_sched,
|
|
GST_PAD (link->srcpad), GST_PAD (link->sinkpad));
|
|
} else {
|
|
GST_CAT_INFO (GST_CAT_PADS,
|
|
"not telling link to scheduler %s:%s and %s:%s, %p %p",
|
|
GST_DEBUG_PAD_NAME (link->srcpad), GST_DEBUG_PAD_NAME (link->sinkpad),
|
|
src_sched, sink_sched);
|
|
}
|
|
|
|
GST_CAT_INFO (GST_CAT_PADS, "linked %s:%s and %s:%s, successful",
|
|
GST_DEBUG_PAD_NAME (link->srcpad), GST_DEBUG_PAD_NAME (link->sinkpad));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_link:
|
|
* @srcpad: the source #GstPad to link.
|
|
* @sinkpad: the sink #GstPad to link.
|
|
*
|
|
* Links the source pad to the sink pad.
|
|
*
|
|
* Returns: TRUE if the pad could be linked, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_link (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
return gst_pad_link_filtered (srcpad, sinkpad, NULL);
|
|
}
|
|
|
|
/* FIXME 0.9: Remove this */
|
|
/**
|
|
* gst_pad_set_parent:
|
|
* @pad: a #GstPad to set the parent of.
|
|
* @parent: the new parent #GstElement.
|
|
*
|
|
* Sets the parent object of a pad. Deprecated, use gst_object_set_parent()
|
|
* instead.
|
|
*/
|
|
void
|
|
gst_pad_set_parent (GstPad * pad, GstElement * parent)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (GST_PAD_PARENT (pad) == NULL);
|
|
g_return_if_fail (GST_IS_ELEMENT (parent));
|
|
|
|
gst_object_set_parent (GST_OBJECT (pad), GST_OBJECT (parent));
|
|
}
|
|
|
|
/* FIXME 0.9: Remove this */
|
|
/**
|
|
* gst_pad_get_parent:
|
|
* @pad: the #GstPad to get the parent of.
|
|
*
|
|
* Gets the parent object of this pad. Deprecated, use gst_object_get_parent()
|
|
* instead.
|
|
*
|
|
* Returns: the parent #GstElement.
|
|
*/
|
|
GstElement *
|
|
gst_pad_get_parent (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
return GST_PAD_PARENT (pad);
|
|
}
|
|
|
|
static void
|
|
gst_pad_set_pad_template (GstPad * pad, GstPadTemplate * templ)
|
|
{
|
|
/* this function would need checks if it weren't static */
|
|
|
|
gst_object_replace ((GstObject **) & pad->padtemplate, (GstObject *) templ);
|
|
|
|
if (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.
|
|
*/
|
|
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_scheduler:
|
|
* @pad: a #GstPad to get the scheduler of.
|
|
*
|
|
* Gets the scheduler of the pad. Since the pad does not
|
|
* have a scheduler of its own, the scheduler of the parent
|
|
* is taken. For decoupled pads, the scheduler of the peer
|
|
* parent is taken.
|
|
*
|
|
* Returns: the #GstScheduler of the pad, or %NULL if there is no parent or the
|
|
* parent is not yet in a managing bin.
|
|
*/
|
|
GstScheduler *
|
|
gst_pad_get_scheduler (GstPad * pad)
|
|
{
|
|
GstScheduler *scheduler = NULL;
|
|
GstElement *parent;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
parent = gst_pad_get_parent (pad);
|
|
if (parent) {
|
|
if (GST_FLAG_IS_SET (parent, GST_ELEMENT_DECOUPLED)) {
|
|
GstRealPad *peer = GST_RPAD_PEER (pad);
|
|
|
|
if (peer) {
|
|
scheduler =
|
|
gst_element_get_scheduler (gst_pad_get_parent (GST_PAD (peer)));
|
|
}
|
|
} else {
|
|
scheduler = gst_element_get_scheduler (parent);
|
|
}
|
|
}
|
|
|
|
return scheduler;
|
|
}
|
|
|
|
/**
|
|
* 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().
|
|
*
|
|
* Returns: the parent #GstElement.
|
|
*/
|
|
GstElement *
|
|
gst_pad_get_real_parent (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
return GST_PAD_PARENT (GST_PAD (GST_PAD_REALIZE (pad)));
|
|
}
|
|
|
|
/* FIXME 0.9: Make static. */
|
|
/**
|
|
* gst_pad_add_ghost_pad:
|
|
* @pad: a #GstPad to attach the ghost pad to.
|
|
* @ghostpad: the ghost #GstPad to to the pad.
|
|
*
|
|
* Adds a ghost pad to a pad. Private function, will be removed from the API in
|
|
* 0.9.
|
|
*/
|
|
void
|
|
gst_pad_add_ghost_pad (GstPad * pad, GstPad * ghostpad)
|
|
{
|
|
GstRealPad *realpad;
|
|
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (GST_IS_GHOST_PAD (ghostpad));
|
|
|
|
/* 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));
|
|
}
|
|
|
|
/* FIXME 0.9: Make static. */
|
|
/**
|
|
* gst_pad_remove_ghost_pad:
|
|
* @pad: a #GstPad to remove the ghost pad from.
|
|
* @ghostpad: the ghost #GstPad to remove from the pad.
|
|
*
|
|
* Removes a ghost pad from a pad. Private, will be removed from the API in 0.9.
|
|
*/
|
|
void
|
|
gst_pad_remove_ghost_pad (GstPad * pad, GstPad * ghostpad)
|
|
{
|
|
GstRealPad *realpad;
|
|
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (GST_IS_GHOST_PAD (ghostpad));
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_ghost_pad_list:
|
|
* @pad: a #GstPad to get the ghost pads of.
|
|
*
|
|
* Gets the ghost pads of this pad.
|
|
*
|
|
* Returns: a #GList of ghost pads.
|
|
*/
|
|
GList *
|
|
gst_pad_get_ghost_pad_list (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
return GST_PAD_REALIZE (pad)->ghostpads;
|
|
}
|
|
|
|
static gboolean
|
|
_gst_pad_default_fixate_foreach (GQuark field_id, GValue * value, gpointer s)
|
|
{
|
|
GstStructure *structure = (GstStructure *) s;
|
|
GType type = G_VALUE_TYPE (value);
|
|
|
|
if (G_TYPE_IS_FUNDAMENTAL (type) || type == GST_TYPE_FOURCC)
|
|
return TRUE;
|
|
|
|
if (type == GST_TYPE_INT_RANGE) {
|
|
gst_structure_set (structure, g_quark_to_string (field_id),
|
|
G_TYPE_INT, gst_value_get_int_range_min (value), NULL);
|
|
return FALSE;
|
|
}
|
|
if (type == GST_TYPE_DOUBLE_RANGE) {
|
|
gst_structure_set (structure, g_quark_to_string (field_id),
|
|
G_TYPE_DOUBLE, gst_value_get_double_range_min (value), NULL);
|
|
return FALSE;
|
|
}
|
|
if (type == GST_TYPE_LIST) {
|
|
gst_structure_set_value (structure, g_quark_to_string (field_id),
|
|
gst_value_list_get_value (value, 0));
|
|
return FALSE;
|
|
}
|
|
|
|
g_critical ("don't know how to fixate type %s", g_type_name (type));
|
|
return TRUE;
|
|
}
|
|
|
|
static GstCaps *
|
|
_gst_pad_default_fixate_func (GstPad * pad, const GstCaps * caps)
|
|
{
|
|
static GstStaticCaps octetcaps = GST_STATIC_CAPS ("application/octet-stream");
|
|
GstStructure *structure;
|
|
GstCaps *newcaps;
|
|
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
g_return_val_if_fail (caps != NULL, NULL);
|
|
g_return_val_if_fail (!gst_caps_is_empty (caps), NULL);
|
|
|
|
if (gst_caps_is_any (caps)) {
|
|
return gst_caps_copy (gst_static_caps_get (&octetcaps));
|
|
}
|
|
|
|
if (caps->structs->len > 1) {
|
|
return gst_caps_new_full (gst_structure_copy (gst_caps_get_structure (caps,
|
|
0)), NULL);
|
|
}
|
|
|
|
newcaps = gst_caps_copy (caps);
|
|
structure = gst_caps_get_structure (newcaps, 0);
|
|
gst_structure_foreach (structure, _gst_pad_default_fixate_foreach, structure);
|
|
|
|
return newcaps;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_perform_negotiate:
|
|
* @srcpad: the source #GstPad.
|
|
* @sinkpad: the sink #GstPad.
|
|
*
|
|
* Tries to negotiate the pads. See gst_pad_renegotiate() for a brief
|
|
* description of caps negotiation.
|
|
*
|
|
* Returns: TRUE if the pads were succesfully negotiated, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_perform_negotiate (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
return GST_PAD_LINK_SUCCESSFUL (gst_pad_renegotiate (srcpad));
|
|
}
|
|
|
|
static void
|
|
gst_pad_link_unnegotiate (GstPadLink * link)
|
|
{
|
|
g_return_if_fail (link != NULL);
|
|
|
|
if (link->caps) {
|
|
gst_caps_free (link->caps);
|
|
link->caps = NULL;
|
|
if (GST_RPAD_LINK (link->srcpad) != link) {
|
|
g_warning ("unnegotiating unset link");
|
|
} else {
|
|
g_object_notify (G_OBJECT (link->srcpad), "caps");
|
|
}
|
|
if (GST_RPAD_LINK (link->sinkpad) != link) {
|
|
g_warning ("unnegotiating unset link");
|
|
} else {
|
|
g_object_notify (G_OBJECT (link->sinkpad), "caps");
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_unnegotiate:
|
|
* @pad: pad to unnegotiate
|
|
*
|
|
* "Unnegotiates" a pad. The currently negotiated caps are cleared and the pad
|
|
* needs renegotiation.
|
|
*/
|
|
void
|
|
gst_pad_unnegotiate (GstPad * pad)
|
|
{
|
|
GstPadLink *link;
|
|
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
link = GST_RPAD_LINK (GST_PAD_REALIZE (pad));
|
|
if (link)
|
|
gst_pad_link_unnegotiate (link);
|
|
}
|
|
|
|
/* returning NULL indicates that the arguments are invalid */
|
|
static GstPadLink *
|
|
gst_pad_link_prepare (GstPad * srcpad, GstPad * sinkpad,
|
|
const GstCaps * filtercaps)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
GstPadLink *link;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), NULL);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), NULL);
|
|
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
if ((GST_PAD (realsrc) != srcpad) || (GST_PAD (realsink) != sinkpad)) {
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "*actually* linking %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
}
|
|
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsrc) == NULL, NULL);
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsink) == NULL, NULL);
|
|
g_return_val_if_fail (GST_PAD_PARENT (realsrc) != NULL, NULL);
|
|
g_return_val_if_fail (GST_PAD_PARENT (realsink) != NULL, NULL);
|
|
|
|
if (!gst_pad_check_schedulers (realsrc, realsink)) {
|
|
g_warning ("linking pads with different scheds requires "
|
|
"exactly one decoupled element (such as queue)");
|
|
return NULL;
|
|
}
|
|
|
|
if (GST_RPAD_DIRECTION (realsrc) == GST_RPAD_DIRECTION (realsink)) {
|
|
g_warning ("%s:%s and %s:%s are both %s pads, failed",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink),
|
|
GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC ? "src" : "sink");
|
|
return NULL;
|
|
}
|
|
|
|
link = gst_pad_link_new ();
|
|
|
|
if (GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) {
|
|
link->srcpad = GST_PAD (realsrc);
|
|
link->sinkpad = GST_PAD (realsink);
|
|
} else {
|
|
link->srcpad = GST_PAD (realsink);
|
|
link->sinkpad = GST_PAD (realsrc);
|
|
}
|
|
|
|
link->srccaps = gst_pad_get_caps (link->srcpad);
|
|
link->sinkcaps = gst_pad_get_caps (link->sinkpad);
|
|
if (filtercaps)
|
|
link->filtercaps = gst_caps_copy (filtercaps);
|
|
|
|
return link;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_try_relink_filtered:
|
|
* @srcpad: the source #GstPad to relink.
|
|
* @sinkpad: the sink #GstPad to relink.
|
|
* @filtercaps: the #GstPad to use as a filter in the relink.
|
|
*
|
|
* Tries to relink the given source and sink pad, constrained by the given
|
|
* capabilities.
|
|
*
|
|
* Returns: TRUE if the pads were succesfully renegotiated, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_try_relink_filtered (GstPad * srcpad, GstPad * sinkpad,
|
|
const GstCaps * filtercaps)
|
|
{
|
|
GstPadLink *link;
|
|
|
|
GST_INFO ("trying to relink %" GST_PTR_FORMAT " and %" GST_PTR_FORMAT
|
|
" with filtercaps %" GST_PTR_FORMAT, srcpad, sinkpad);
|
|
|
|
link = gst_pad_link_prepare (srcpad, sinkpad, filtercaps);
|
|
if (!link)
|
|
return FALSE;
|
|
|
|
if (GST_RPAD_PEER (link->srcpad) != (GstRealPad *) link->sinkpad) {
|
|
g_warning ("Pads %s:%s and %s:%s were never linked",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
|
|
gst_pad_link_free (link);
|
|
return FALSE;
|
|
}
|
|
|
|
if (GST_PAD_LINK_FAILED (gst_pad_link_try (link)))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_relink_filtered:
|
|
* @srcpad: the source #GstPad to relink.
|
|
* @sinkpad: the sink #GstPad to relink.
|
|
* @filtercaps: the #GstPad to use as a filter in the relink.
|
|
*
|
|
* Relinks the given source and sink pad, constrained by the given
|
|
* capabilities. If the relink fails, the pads are unlinked
|
|
* and FALSE is returned.
|
|
*
|
|
* Returns: TRUE if the pads were succesfully relinked, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_relink_filtered (GstPad * srcpad, GstPad * sinkpad,
|
|
const GstCaps * filtercaps)
|
|
{
|
|
if (gst_pad_try_relink_filtered (srcpad, sinkpad, filtercaps))
|
|
return TRUE;
|
|
|
|
gst_pad_unlink (srcpad, sinkpad);
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_proxy_getcaps:
|
|
* @pad: a #GstPad to proxy.
|
|
*
|
|
* Calls gst_pad_get_allowed_caps() for every other pad belonging to the
|
|
* same element as @pad, and returns the intersection of the results.
|
|
*
|
|
* This function is useful as a default getcaps function for an element
|
|
* that can handle any stream format, but requires all its pads to have
|
|
* the same caps. Two such elements are tee and aggregator.
|
|
*
|
|
* Returns: the intersection of the other pads' allowed caps.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_proxy_getcaps (GstPad * pad)
|
|
{
|
|
GstElement *element;
|
|
const GList *pads;
|
|
GstCaps *caps;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
GST_DEBUG ("proxying getcaps for %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
element = gst_pad_get_parent (pad);
|
|
|
|
pads = gst_element_get_pad_list (element);
|
|
|
|
caps = gst_caps_new_any ();
|
|
while (pads) {
|
|
GstPad *otherpad = GST_PAD (pads->data);
|
|
GstCaps *temp;
|
|
|
|
if (otherpad != pad) {
|
|
GstCaps *allowed = gst_pad_get_allowed_caps (otherpad);
|
|
|
|
temp = gst_caps_intersect (caps, allowed);
|
|
gst_caps_free (caps);
|
|
gst_caps_free (allowed);
|
|
caps = temp;
|
|
}
|
|
|
|
pads = g_list_next (pads);
|
|
}
|
|
|
|
return caps;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_proxy_pad_link:
|
|
* @pad: a #GstPad to proxy.
|
|
*
|
|
* Calls gst_pad_try_set_caps() for every other pad belonging to the
|
|
* same element as @pad. If gst_pad_try_set_caps() fails on any pad,
|
|
* the proxy link fails. May be used only during negotiation.
|
|
*
|
|
* Returns: GST_PAD_LINK_OK if sucessful
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_proxy_pad_link (GstPad * pad, const GstCaps * caps)
|
|
{
|
|
GstElement *element;
|
|
const GList *pads;
|
|
GstPadLinkReturn ret;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (caps != NULL, GST_PAD_LINK_REFUSED);
|
|
|
|
GST_DEBUG ("proxying pad link for %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
element = gst_pad_get_parent (pad);
|
|
|
|
pads = gst_element_get_pad_list (element);
|
|
|
|
while (pads) {
|
|
GstPad *otherpad = GST_PAD (pads->data);
|
|
|
|
if (otherpad != pad) {
|
|
ret = gst_pad_try_set_caps (otherpad, caps);
|
|
if (GST_PAD_LINK_FAILED (ret)) {
|
|
return ret;
|
|
}
|
|
}
|
|
pads = g_list_next (pads);
|
|
}
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_proxy_fixate:
|
|
* @pad: a #GstPad to proxy.
|
|
*
|
|
* Implements a default fixate function based on the caps set on the other
|
|
* pads in the element. This function should only be used if every pad
|
|
* has the same pad template caps.
|
|
*
|
|
* Returns: a fixated caps, or NULL if caps cannot be fixed
|
|
*/
|
|
GstCaps *
|
|
gst_pad_proxy_fixate (GstPad * pad, const GstCaps * caps)
|
|
{
|
|
GstElement *element;
|
|
const GList *pads;
|
|
const GstCaps *othercaps;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
g_return_val_if_fail (caps != NULL, NULL);
|
|
|
|
GST_DEBUG ("proxying fixate for %s:%s\n", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
element = gst_pad_get_parent (pad);
|
|
|
|
pads = gst_element_get_pad_list (element);
|
|
|
|
while (pads) {
|
|
GstPad *otherpad = GST_PAD (pads->data);
|
|
|
|
/* FIXME check that each pad has the same pad template caps */
|
|
|
|
if (otherpad != pad) {
|
|
othercaps = gst_pad_get_negotiated_caps (otherpad);
|
|
|
|
if (othercaps) {
|
|
GstCaps *icaps;
|
|
|
|
icaps = gst_caps_intersect (othercaps, caps);
|
|
if (!gst_caps_is_empty (icaps)) {
|
|
return icaps;
|
|
} else {
|
|
gst_caps_free (icaps);
|
|
}
|
|
}
|
|
}
|
|
pads = g_list_next (pads);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_explicit_caps:
|
|
* @pad: a #GstPad to set the explicit caps of
|
|
* @caps: the #GstCaps to set
|
|
*
|
|
* If a pad has been told to use explicit caps, this function is used
|
|
* to set the explicit caps. If @caps is NULL, the explicit caps are
|
|
* unset.
|
|
*
|
|
* This function calls gst_pad_try_set_caps() on the pad. If that
|
|
* call fails, GST_ELEMENT_ERROR() is called to indicate a negotiation
|
|
* failure.
|
|
*
|
|
* Returns: TRUE if the caps were set correctly, otherwise FALSE
|
|
*/
|
|
gboolean
|
|
gst_pad_set_explicit_caps (GstPad * pad, const GstCaps * caps)
|
|
{
|
|
GstPadLinkReturn link_ret;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "setting explicit caps to %" GST_PTR_FORMAT,
|
|
caps);
|
|
|
|
if (caps == NULL) {
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "caps is NULL");
|
|
gst_caps_replace (&GST_RPAD_EXPLICIT_CAPS (pad), NULL);
|
|
return TRUE;
|
|
}
|
|
|
|
gst_caps_replace (&GST_RPAD_EXPLICIT_CAPS (pad), gst_caps_copy (caps));
|
|
|
|
if (!GST_PAD_IS_LINKED (pad)) {
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "pad is not linked");
|
|
return TRUE;
|
|
}
|
|
link_ret = gst_pad_try_set_caps (pad, caps);
|
|
if (link_ret == GST_PAD_LINK_REFUSED) {
|
|
GST_ELEMENT_ERROR (gst_pad_get_parent (pad), CORE, PAD, (NULL),
|
|
("failed to negotiate (try_set_caps returned REFUSED)"));
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_pad_explicit_getcaps (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
if (GST_RPAD_EXPLICIT_CAPS (pad) == NULL) {
|
|
const GstCaps *caps = gst_pad_get_pad_template_caps (pad);
|
|
|
|
return gst_caps_copy (caps);
|
|
}
|
|
return gst_caps_copy (GST_RPAD_EXPLICIT_CAPS (pad));
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_pad_explicit_link (GstPad * pad, const GstCaps * caps)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (caps != NULL, GST_PAD_LINK_REFUSED);
|
|
|
|
if (GST_RPAD_EXPLICIT_CAPS (pad) == NULL) {
|
|
return GST_PAD_LINK_DELAYED;
|
|
}
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_use_explicit_caps:
|
|
* @pad: a #GstPad to set to use explicit caps
|
|
*
|
|
* This function handles negotiation for pads that need to be set
|
|
* to particular caps under complete control of the element, based
|
|
* on some state in the element. This is often the case with
|
|
* decoders and other elements whose caps is determined by the data
|
|
* stream.
|
|
*
|
|
* WARNING: This function is a hack and will be replaced with something
|
|
* better in gstreamer-0.9.
|
|
*/
|
|
void
|
|
gst_pad_use_explicit_caps (GstPad * pad)
|
|
{
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
|
|
gst_pad_set_getcaps_function (pad, gst_pad_explicit_getcaps);
|
|
gst_pad_set_link_function (pad, gst_pad_explicit_link);
|
|
gst_caps_replace (&GST_RPAD_EXPLICIT_CAPS (pad), NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_proxy_link:
|
|
* @pad: a #GstPad to proxy to.
|
|
* @caps: the #GstCaps to use in proxying.
|
|
*
|
|
* Proxies the link function to the specified pad.
|
|
*
|
|
* Returns: TRUE if the peer pad accepted the caps, FALSE otherwise.
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_proxy_link (GstPad * pad, const GstCaps * caps)
|
|
{
|
|
return gst_pad_try_set_caps (pad, caps);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_is_negotiated:
|
|
* @pad: a #GstPad to get the negotiation status of
|
|
*
|
|
* Returns: TRUE if the pad has successfully negotiated caps.
|
|
*/
|
|
gboolean
|
|
gst_pad_is_negotiated (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
if (!GST_PAD_REALIZE (pad))
|
|
return FALSE;
|
|
if (!GST_RPAD_LINK (pad))
|
|
return FALSE;
|
|
|
|
return (GST_RPAD_LINK (pad)->caps != NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_negotiated_caps:
|
|
* @pad: a #GstPad to get the negotiated capabilites of
|
|
*
|
|
* Gets the currently negotiated caps of a pad.
|
|
*
|
|
* Returns: the currently negotiated caps of a pad, or NULL if the pad isn't
|
|
* negotiated.
|
|
*/
|
|
G_CONST_RETURN GstCaps *
|
|
gst_pad_get_negotiated_caps (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
if (!GST_PAD_REALIZE (pad))
|
|
return NULL;
|
|
if (!GST_RPAD_LINK (pad))
|
|
return NULL;
|
|
|
|
return GST_RPAD_LINK (pad)->caps;
|
|
}
|
|
|
|
/**
|
|
* 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_free to get rid of it.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_get_caps (GstPad * pad)
|
|
{
|
|
GstRealPad *realpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
realpad = GST_PAD_REALIZE (pad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "get pad caps of %s:%s (%p)",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
|
|
if (GST_RPAD_GETCAPSFUNC (realpad)) {
|
|
GstCaps *caps;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "using pad getcaps function");
|
|
caps = GST_RPAD_GETCAPSFUNC (realpad) (GST_PAD (realpad));
|
|
|
|
if (caps == NULL) {
|
|
g_critical ("pad %s:%s returned NULL caps from getcaps function\n",
|
|
GST_ELEMENT_NAME (GST_PAD_PARENT (GST_PAD (realpad))),
|
|
GST_PAD_NAME (realpad));
|
|
caps = gst_caps_new_any ();
|
|
}
|
|
|
|
return caps;
|
|
} else if (GST_PAD_PAD_TEMPLATE (realpad)) {
|
|
GstPadTemplate *templ = GST_PAD_PAD_TEMPLATE (realpad);
|
|
const GstCaps *caps;
|
|
|
|
caps = GST_PAD_TEMPLATE_CAPS (templ);
|
|
GST_CAT_DEBUG (GST_CAT_CAPS,
|
|
"using pad template %p with caps %" GST_PTR_FORMAT, templ, caps);
|
|
|
|
#if 0
|
|
/* FIXME we should enable something like this someday, but this is
|
|
* a bit buggy */
|
|
if (!gst_caps_is_fixed (caps)) {
|
|
g_warning
|
|
("pad %s:%s (%p) has no getcaps function and the pad template returns non-fixed caps. Element is probably broken.\n",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
}
|
|
#endif
|
|
|
|
return gst_caps_copy (GST_PAD_TEMPLATE_CAPS (templ));
|
|
}
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "pad has no caps");
|
|
|
|
#if 0
|
|
/* FIXME enable */
|
|
g_warning ("pad %s:%s (%p) has no pad template\n",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
#endif
|
|
|
|
return gst_caps_new_any ();
|
|
}
|
|
|
|
/**
|
|
* 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));
|
|
|
|
#if 0
|
|
/* FIXME this should be enabled some day */
|
|
/* wingo: why? mail the list during 0.9 when you find this :) */
|
|
g_warning ("pad %s:%s (%p) has no pad template\n",
|
|
GST_DEBUG_PAD_NAME (realpad), realpad);
|
|
#endif
|
|
|
|
return gst_static_caps_get (&anycaps);
|
|
}
|
|
|
|
/* FIXME 0.9: This function should probably die, or at least be renamed to
|
|
* get_caps_by_format. */
|
|
/**
|
|
* gst_pad_template_get_caps_by_name:
|
|
* @templ: a #GstPadTemplate to get the capabilities of.
|
|
* @name: the name of the capability to get.
|
|
*
|
|
* Gets the capability with the given name from @templ.
|
|
*
|
|
* Returns: the #GstCaps of this pad template, or NULL if not found. If you
|
|
* intend to keep a reference on the caps, make a copy (see gst_caps_copy ()).
|
|
*/
|
|
const GstCaps *
|
|
gst_pad_template_get_caps_by_name (GstPadTemplate * templ, const gchar * name)
|
|
{
|
|
GstCaps *caps;
|
|
|
|
g_return_val_if_fail (templ != NULL, NULL);
|
|
|
|
caps = GST_PAD_TEMPLATE_CAPS (templ);
|
|
if (!caps)
|
|
return NULL;
|
|
|
|
/* FIXME */
|
|
//return gst_caps_copy (gst_caps_get_by_name (caps, name));
|
|
return NULL;
|
|
}
|
|
|
|
/* FIXME 0.9: What good is this if it only works for already-negotiated pads? */
|
|
/**
|
|
* gst_pad_check_compatibility:
|
|
* @srcpad: the source #GstPad to check.
|
|
* @sinkpad: the sink #GstPad to check against.
|
|
*
|
|
* Checks if two pads have compatible capabilities. If neither one has yet been
|
|
* negotiated, returns TRUE for no good reason.
|
|
*
|
|
* Returns: TRUE if they are compatible or if the capabilities could not be
|
|
* checked, FALSE if the capabilities are not compatible.
|
|
*/
|
|
gboolean
|
|
gst_pad_check_compatibility (GstPad * srcpad, GstPad * sinkpad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
|
|
|
|
if (GST_PAD_CAPS (srcpad) && GST_PAD_CAPS (sinkpad)) {
|
|
if (!gst_caps_is_always_compatible (GST_PAD_CAPS (srcpad),
|
|
GST_PAD_CAPS (sinkpad))) {
|
|
return FALSE;
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
} else {
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"could not check capabilities of pads (%s:%s) and (%s:%s) %p %p",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad),
|
|
GST_PAD_CAPS (srcpad), GST_PAD_CAPS (sinkpad));
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_peer:
|
|
* @pad: a #GstPad to get the peer of.
|
|
*
|
|
* Gets the peer of @pad.
|
|
*
|
|
* Returns: the peer #GstPad.
|
|
*/
|
|
GstPad *
|
|
gst_pad_get_peer (GstPad * pad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
return GST_PAD (GST_PAD_PEER (pad));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_allowed_caps:
|
|
* @pad: a real #GstPad.
|
|
*
|
|
* Gets the capabilities of the allowed media types that can flow through @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.
|
|
*/
|
|
GstCaps *
|
|
gst_pad_get_allowed_caps (GstPad * pad)
|
|
{
|
|
const GstCaps *mycaps;
|
|
GstCaps *caps;
|
|
GstCaps *peercaps;
|
|
GstCaps *icaps;
|
|
GstPadLink *link;
|
|
|
|
g_return_val_if_fail (GST_IS_REAL_PAD (pad), NULL);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PROPERTIES, "get allowed caps of %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
mycaps = gst_pad_get_pad_template_caps (pad);
|
|
if (GST_RPAD_PEER (pad) == NULL) {
|
|
return gst_caps_copy (mycaps);
|
|
}
|
|
|
|
peercaps = gst_pad_get_caps (GST_PAD_PEER (pad));
|
|
caps = gst_caps_intersect (mycaps, peercaps);
|
|
gst_caps_free (peercaps);
|
|
|
|
link = GST_RPAD_LINK (pad);
|
|
if (link->filtercaps) {
|
|
icaps = gst_caps_intersect (caps, link->filtercaps);
|
|
gst_caps_free (caps);
|
|
return icaps;
|
|
} else {
|
|
return caps;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_pad_caps_change_notify:
|
|
* @pad: a #GstPad
|
|
*
|
|
* Called to indicate that the return value of @pad's getcaps function may have
|
|
* changed, and that a renegotiation is suggested.
|
|
*/
|
|
void
|
|
gst_pad_caps_change_notify (GstPad * pad)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* gst_pad_recover_caps_error:
|
|
* @pad: a #GstPad that had a failed capsnego
|
|
* @allowed: possible caps for the link
|
|
*
|
|
* Attempt to recover from a failed caps negotiation. This function
|
|
* is typically called by a plugin that exhausted its list of caps
|
|
* and wants the application to resolve the issue. The application
|
|
* should connect to the pad's caps_nego_failed signal and should
|
|
* resolve the issue by connecting another element for example.
|
|
*
|
|
* Returns: TRUE when the issue was resolved, dumps detailed information
|
|
* on the console and returns FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_recover_caps_error (GstPad * pad, const GstCaps * allowed)
|
|
{
|
|
/* FIXME */
|
|
return FALSE;
|
|
}
|
|
|
|
/* FIXME 0.9: Is it so difficult to write SOURCE? */
|
|
/**
|
|
* gst_pad_alloc_buffer:
|
|
* @pad: a source #GstPad.
|
|
*
|
|
* Allocates a new, empty buffer optimized to push to pad @pad. This
|
|
* function only works if @pad is a src pad.
|
|
*
|
|
* Returns: a new, empty #GstBuffer, or NULL if there is an error
|
|
*/
|
|
GstBuffer *
|
|
gst_pad_alloc_buffer (GstPad * pad, guint64 offset, gint size)
|
|
{
|
|
GstRealPad *peer;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
g_return_val_if_fail (GST_PAD_IS_SRC (pad), NULL);
|
|
|
|
peer = GST_RPAD_PEER (pad);
|
|
|
|
if (!peer)
|
|
return gst_buffer_new_and_alloc (size);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_BUFFER, "(%s:%s): getting buffer",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
if (peer->bufferallocfunc) {
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"calling bufferallocfunc &%s (@%p) of peer pad %s:%s",
|
|
GST_DEBUG_FUNCPTR_NAME (peer->bufferallocfunc),
|
|
&peer->bufferallocfunc, GST_DEBUG_PAD_NAME (((GstPad *) peer)));
|
|
return (peer->bufferallocfunc) (GST_PAD (peer), offset, size);
|
|
} else {
|
|
return gst_buffer_new_and_alloc (size);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_real_pad_dispose (GObject * object)
|
|
{
|
|
GstPad *pad = GST_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 (GST_REAL_PAD (pad)->ghostpads) {
|
|
GList *orig, *ghostpads;
|
|
|
|
orig = ghostpads = g_list_copy (GST_REAL_PAD (pad)->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 (GST_REAL_PAD (pad)->ghostpads == 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);
|
|
}
|
|
|
|
if (GST_RPAD_EXPLICIT_CAPS (pad)) {
|
|
GST_ERROR_OBJECT (pad, "still explicit caps %" GST_PTR_FORMAT " set",
|
|
GST_RPAD_EXPLICIT_CAPS (pad));
|
|
g_warning ("pad %p has still explicit caps set", pad);
|
|
gst_caps_replace (&GST_RPAD_EXPLICIT_CAPS (pad), NULL);
|
|
}
|
|
G_OBJECT_CLASS (real_pad_parent_class)->dispose (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;
|
|
|
|
while (field) {
|
|
if (!strcmp (field->name, "name")) {
|
|
pad = gst_element_get_pad (GST_ELEMENT (parent),
|
|
xmlNodeGetContent (field));
|
|
} else if (!strcmp (field->name, "peer")) {
|
|
peer = 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));
|
|
return;
|
|
}
|
|
|
|
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, "name", 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, "peer", content);
|
|
g_free (content);
|
|
} else
|
|
xmlNewChild (parent, NULL, "peer", "");
|
|
|
|
return parent;
|
|
}
|
|
|
|
/* FIXME: shouldn't it be gst_pad_ghost_* ?
|
|
* dunno -- wingo 7 feb 2004
|
|
*/
|
|
/**
|
|
* 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, "ghostpad", NULL);
|
|
xmlNewChild (self, NULL, "name", GST_PAD_NAME (pad));
|
|
xmlNewChild (self, NULL, "parent", GST_OBJECT_NAME (GST_PAD_PARENT (pad)));
|
|
|
|
/* FIXME FIXME FIXME! */
|
|
|
|
return self;
|
|
}
|
|
#endif /* GST_DISABLE_LOADSAVE */
|
|
|
|
/**
|
|
* gst_pad_push:
|
|
* @pad: a source #GstPad.
|
|
* @data: the #GstData to push.
|
|
*
|
|
* Pushes a buffer or an event to the peer of @pad. @pad must be linked. May
|
|
* only be called by @pad's parent.
|
|
*/
|
|
void
|
|
gst_pad_push (GstPad * pad, GstData * data)
|
|
{
|
|
GstRealPad *peer;
|
|
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (GST_PAD_DIRECTION (pad) == GST_PAD_SRC);
|
|
g_return_if_fail (data != NULL);
|
|
|
|
if (!gst_probe_dispatcher_dispatch (&(GST_REAL_PAD (pad)->probedisp), &data))
|
|
return;
|
|
|
|
if (!GST_PAD_IS_LINKED (pad)) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, pad,
|
|
"not pushing data %p as pad is unconnected", data);
|
|
gst_data_unref (data);
|
|
return;
|
|
}
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, pad, "pushing");
|
|
peer = GST_RPAD_PEER (pad);
|
|
|
|
if (!peer) {
|
|
g_warning ("push on pad %s:%s but it is unlinked",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
} else {
|
|
if (!GST_IS_EVENT (data) && !GST_PAD_IS_ACTIVE (peer)) {
|
|
g_warning ("push on peer of pad %s:%s but peer is not active",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
return;
|
|
}
|
|
|
|
if (peer->chainhandler) {
|
|
if (data) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, pad,
|
|
"calling chainhandler &%s of peer pad %s:%s",
|
|
GST_DEBUG_FUNCPTR_NAME (peer->chainhandler),
|
|
GST_DEBUG_PAD_NAME (GST_PAD (peer)));
|
|
if (!gst_probe_dispatcher_dispatch (&peer->probedisp, &data))
|
|
return;
|
|
|
|
(peer->chainhandler) (GST_PAD (peer), data);
|
|
return;
|
|
} else {
|
|
g_warning ("trying to push a NULL buffer on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (peer));
|
|
return;
|
|
}
|
|
} else {
|
|
g_warning ("internal error: push on pad %s:%s but it has no chainhandler",
|
|
GST_DEBUG_PAD_NAME (peer));
|
|
}
|
|
}
|
|
/* clean up the mess here */
|
|
if (data != NULL)
|
|
gst_data_unref (data);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_pull:
|
|
* @pad: a sink #GstPad.
|
|
*
|
|
* Pulls an event or a buffer from the peer pad. May only be called by @pad's
|
|
* parent.
|
|
*
|
|
* Returns: a new #GstData from the peer pad.
|
|
*/
|
|
GstData *
|
|
gst_pad_pull (GstPad * pad)
|
|
{
|
|
GstRealPad *peer;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, pad, "pulling");
|
|
|
|
g_return_val_if_fail (GST_PAD_DIRECTION (pad) == GST_PAD_SINK,
|
|
GST_DATA (gst_event_new (GST_EVENT_INTERRUPT)));
|
|
|
|
peer = GST_RPAD_PEER (pad);
|
|
|
|
if (!peer) {
|
|
GST_ELEMENT_ERROR (GST_PAD_PARENT (pad), CORE, PAD, (NULL),
|
|
("pull on pad %s:%s but it was unlinked", GST_DEBUG_PAD_NAME (pad)));
|
|
} else {
|
|
restart:
|
|
if (peer->gethandler) {
|
|
GstData *data;
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, pad,
|
|
"calling gethandler %s of peer pad %s:%s",
|
|
GST_DEBUG_FUNCPTR_NAME (peer->gethandler), GST_DEBUG_PAD_NAME (peer));
|
|
|
|
data = (peer->gethandler) (GST_PAD (peer));
|
|
|
|
if (data) {
|
|
if (!gst_probe_dispatcher_dispatch (&peer->probedisp, &data))
|
|
goto restart;
|
|
return data;
|
|
}
|
|
|
|
/* no null buffers allowed */
|
|
GST_ELEMENT_ERROR (GST_PAD_PARENT (pad), CORE, PAD, (NULL),
|
|
("NULL buffer during pull on %s:%s", GST_DEBUG_PAD_NAME (pad)));
|
|
} else {
|
|
GST_ELEMENT_ERROR (GST_PAD_PARENT (pad), CORE, PAD, (NULL),
|
|
("pull on pad %s:%s but the peer pad %s:%s has no gethandler",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (peer)));
|
|
}
|
|
}
|
|
return GST_DATA (gst_event_new (GST_EVENT_INTERRUPT));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_selectv:
|
|
* @padlist: a #GList of sink pads.
|
|
*
|
|
* Waits for a buffer on any of the list of pads. Each #GstPad in @padlist must
|
|
* be owned by the calling code.
|
|
*
|
|
* Returns: the #GstPad that has a buffer available.
|
|
* Use #gst_pad_pull() to get the buffer.
|
|
*/
|
|
GstPad *
|
|
gst_pad_selectv (GList * padlist)
|
|
{
|
|
GstPad *pad;
|
|
|
|
pad = gst_scheduler_pad_select (GST_PAD_PARENT (padlist->data)->sched,
|
|
padlist);
|
|
return pad;
|
|
}
|
|
|
|
/* FIXME 0.9: Don't allow the first pad to be NULL */
|
|
/**
|
|
* gst_pad_select:
|
|
* @pad: a first sink #GstPad to perform the select on.
|
|
* @...: A NULL-terminated list of more pads to select on.
|
|
*
|
|
* Waits for a buffer on the given set of pads.
|
|
*
|
|
* Returns: the #GstPad that has a buffer available.
|
|
* Use #gst_pad_pull() to get the buffer.
|
|
*/
|
|
GstPad *
|
|
gst_pad_select (GstPad * pad, ...)
|
|
{
|
|
GstPad *result;
|
|
va_list var_args;
|
|
|
|
if (pad == NULL)
|
|
return NULL;
|
|
|
|
va_start (var_args, pad);
|
|
|
|
result = gst_pad_select_valist (pad, var_args);
|
|
|
|
va_end (var_args);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_select_valist:
|
|
* @pad: a first #GstPad to perform the select on.
|
|
* @varargs: A va_list of more pads to select on.
|
|
*
|
|
* Waits for a buffer on the given set of pads.
|
|
*
|
|
* Returns: the #GstPad that has a buffer available.
|
|
* Use #gst_pad_pull() to get the buffer.
|
|
*/
|
|
GstPad *
|
|
gst_pad_select_valist (GstPad * pad, va_list var_args)
|
|
{
|
|
GstPad *result;
|
|
GList *padlist = NULL;
|
|
|
|
if (pad == NULL)
|
|
return NULL;
|
|
|
|
while (pad) {
|
|
padlist = g_list_prepend (padlist, pad);
|
|
pad = va_arg (var_args, GstPad *);
|
|
}
|
|
result = gst_pad_selectv (padlist);
|
|
g_list_free (padlist);
|
|
|
|
return result;
|
|
}
|
|
|
|
/************************************************************************
|
|
*
|
|
* 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),
|
|
32,
|
|
(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_free (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);
|
|
|
|
if (!name_is_valid (name_template, presence))
|
|
return NULL;
|
|
|
|
#if 0
|
|
#ifdef USE_POISONING
|
|
if (caps) {
|
|
GstCaps *newcaps = gst_caps_copy (caps);
|
|
|
|
gst_caps_free (caps);
|
|
caps = newcaps;
|
|
}
|
|
#endif
|
|
#endif
|
|
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_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, make a copy (see gst_caps_copy ()).
|
|
*/
|
|
const 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;
|
|
}
|
|
|
|
|
|
/***** 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),
|
|
8,
|
|
(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;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
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), FALSE);
|
|
|
|
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.
|
|
*/
|
|
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 (rpad));
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_pad_event_default_dispatch (GstPad * pad, GstElement * element,
|
|
GstEvent * event)
|
|
{
|
|
GList *orig, *pads;
|
|
|
|
GST_INFO_OBJECT (pad, "Sending event %p to all internally linked pads",
|
|
event);
|
|
|
|
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) {
|
|
/* increase the refcount */
|
|
gst_event_ref (event);
|
|
gst_pad_push (eventpad, GST_DATA (event));
|
|
} else {
|
|
GstPad *peerpad = GST_PAD (GST_RPAD_PEER (eventpad));
|
|
|
|
/* we only send the event on one pad, multi-sinkpad elements
|
|
* should implement a handler */
|
|
g_list_free (orig);
|
|
return gst_pad_send_event (peerpad, event);
|
|
}
|
|
}
|
|
}
|
|
gst_event_unref (event);
|
|
g_list_free (orig);
|
|
return (GST_PAD_DIRECTION (pad) == GST_PAD_SINK);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
GstElement *element;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
element = GST_PAD_PARENT (pad);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
gst_pad_event_default_dispatch (pad, element, event);
|
|
gst_element_set_eos (element);
|
|
break;
|
|
case GST_EVENT_DISCONTINUOUS:
|
|
{
|
|
guint64 time;
|
|
|
|
if (gst_element_requires_clock (element) && element->clock) {
|
|
if (gst_event_discont_get_value (event, GST_FORMAT_TIME, &time)) {
|
|
gst_element_set_time (element, time);
|
|
} else {
|
|
GstFormat format = GST_FORMAT_TIME;
|
|
guint i;
|
|
|
|
for (i = 0; i < event->event_data.discont.noffsets; i++) {
|
|
if (gst_pad_convert (pad,
|
|
event->event_data.discont.offsets[i].format,
|
|
event->event_data.discont.offsets[i].value, &format,
|
|
&time)) {
|
|
gst_element_set_time (element, time);
|
|
} else if (i == event->event_data.discont.noffsets) {
|
|
g_warning
|
|
("can't adjust clock to new time when time not provided");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
default:
|
|
return gst_pad_event_default_dispatch (pad, element, event);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* 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_send_event:
|
|
* @pad: a #GstPad to send the event to.
|
|
* @event: the #GstEvent to send to the pad.
|
|
*
|
|
* Sends the event to the pad.
|
|
*
|
|
* Returns: TRUE if the event was handled.
|
|
*/
|
|
gboolean
|
|
gst_pad_send_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean success = FALSE;
|
|
GstRealPad *rpad;
|
|
|
|
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 %d on pad %s:%s",
|
|
GST_EVENT_TYPE (event), GST_DEBUG_PAD_NAME (rpad));
|
|
|
|
if (GST_RPAD_EVENTHANDLER (rpad))
|
|
success = GST_RPAD_EVENTHANDLER (rpad) (GST_PAD (rpad), event);
|
|
else {
|
|
g_warning ("pad %s:%s has no event handler", GST_DEBUG_PAD_NAME (rpad));
|
|
gst_event_unref (event);
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
GstFormat src_format;
|
|
gint64 src_value;
|
|
GstFormat *dest_format;
|
|
gint64 *dest_value;
|
|
}
|
|
GstPadConvertData;
|
|
|
|
static gboolean
|
|
gst_pad_convert_dispatcher (GstPad * pad, GstPadConvertData * data)
|
|
{
|
|
return gst_pad_convert (pad, data->src_format, data->src_value,
|
|
data->dest_format, data->dest_value);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_convert_default:
|
|
* @pad: a #GstPad to invoke the default converter on.
|
|
* @src_format: the source #GstFormat.
|
|
* @src_value: the source value.
|
|
* @dest_format: a pointer to the destination #GstFormat.
|
|
* @dest_value: a pointer to the destination value.
|
|
*
|
|
* Invokes the default converter on a pad.
|
|
* This will forward the call to the pad obtained
|
|
* using the internal link of
|
|
* the element.
|
|
*
|
|
* Returns: TRUE if the conversion could be performed.
|
|
*/
|
|
gboolean
|
|
gst_pad_convert_default (GstPad * pad,
|
|
GstFormat src_format, gint64 src_value,
|
|
GstFormat * dest_format, gint64 * dest_value)
|
|
{
|
|
GstPadConvertData data;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (dest_format != NULL, FALSE);
|
|
g_return_val_if_fail (dest_value != NULL, FALSE);
|
|
|
|
data.src_format = src_format;
|
|
data.src_value = src_value;
|
|
data.dest_format = dest_format;
|
|
data.dest_value = dest_value;
|
|
|
|
return gst_pad_dispatcher (pad, (GstPadDispatcherFunction)
|
|
gst_pad_convert_dispatcher, &data);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_convert:
|
|
* @pad: a #GstPad to invoke the default converter on.
|
|
* @src_format: the source #GstFormat.
|
|
* @src_value: the source value.
|
|
* @dest_format: a pointer to the destination #GstFormat.
|
|
* @dest_value: a pointer to the destination value.
|
|
*
|
|
* Invokes a conversion on the pad.
|
|
*
|
|
* Returns: TRUE if the conversion could be performed.
|
|
*/
|
|
gboolean
|
|
gst_pad_convert (GstPad * pad,
|
|
GstFormat src_format, gint64 src_value,
|
|
GstFormat * dest_format, gint64 * dest_value)
|
|
{
|
|
GstRealPad *rpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (dest_format != NULL, FALSE);
|
|
g_return_val_if_fail (dest_value != NULL, FALSE);
|
|
|
|
if (src_format == *dest_format) {
|
|
*dest_value = src_value;
|
|
return TRUE;
|
|
}
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
if (GST_RPAD_CONVERTFUNC (rpad)) {
|
|
return GST_RPAD_CONVERTFUNC (rpad) (GST_PAD (rpad), src_format,
|
|
src_value, dest_format, dest_value);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
GstQueryType type;
|
|
GstFormat *format;
|
|
gint64 *value;
|
|
}
|
|
GstPadQueryData;
|
|
|
|
static gboolean
|
|
gst_pad_query_dispatcher (GstPad * pad, GstPadQueryData * data)
|
|
{
|
|
return gst_pad_query (pad, data->type, data->format, data->value);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_query_default:
|
|
* @pad: a #GstPad to invoke the default query on.
|
|
* @type: the #GstQueryType of the query to perform.
|
|
* @format: a pointer to the #GstFormat of the result.
|
|
* @value: a pointer to the result.
|
|
*
|
|
* Invokes the default query function on a pad.
|
|
*
|
|
* Returns: TRUE if the query could be performed.
|
|
*/
|
|
gboolean
|
|
gst_pad_query_default (GstPad * pad, GstQueryType type,
|
|
GstFormat * format, gint64 * value)
|
|
{
|
|
GstPadQueryData data;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (format != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
data.type = type;
|
|
data.format = format;
|
|
data.value = value;
|
|
|
|
return gst_pad_dispatcher (pad, (GstPadDispatcherFunction)
|
|
gst_pad_query_dispatcher, &data);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_query:
|
|
* @pad: a #GstPad to invoke the default query on.
|
|
* @type: the #GstQueryType of the query to perform.
|
|
* @format: a pointer to the #GstFormat asked for.
|
|
* On return contains the #GstFormat used.
|
|
* @value: a pointer to the result.
|
|
*
|
|
* Queries a pad for one of the available properties. The format will be
|
|
* adjusted to the actual format used when specifying formats such as
|
|
* GST_FORMAT_DEFAULT.
|
|
* FIXME: Tell if the format can be adjusted when specifying a definite format.
|
|
*
|
|
* Returns: TRUE if the query could be performed.
|
|
*/
|
|
gboolean
|
|
gst_pad_query (GstPad * pad, GstQueryType type,
|
|
GstFormat * format, gint64 * value)
|
|
{
|
|
GstRealPad *rpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
g_return_val_if_fail (format != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
g_return_val_if_fail (rpad, FALSE);
|
|
|
|
if (GST_RPAD_QUERYFUNC (rpad))
|
|
return GST_RPAD_QUERYFUNC (rpad) (GST_PAD (pad), type, format, value);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_pad_get_formats_dispatcher (GstPad * pad, const GstFormat ** data)
|
|
{
|
|
*data = gst_pad_get_formats (pad);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_formats_default:
|
|
* @pad: a #GstPad to query
|
|
*
|
|
* Invoke the default format dispatcher for the pad.
|
|
*
|
|
* Returns: An array of GstFormats ended with a 0 value.
|
|
*/
|
|
const GstFormat *
|
|
gst_pad_get_formats_default (GstPad * pad)
|
|
{
|
|
GstFormat *result = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
gst_pad_dispatcher (pad, (GstPadDispatcherFunction)
|
|
gst_pad_get_formats_dispatcher, &result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_formats:
|
|
* @pad: a #GstPad to query
|
|
*
|
|
* Gets the list of supported formats from the pad.
|
|
*
|
|
* Returns: An array of GstFormats ended with a 0 value.
|
|
*/
|
|
const GstFormat *
|
|
gst_pad_get_formats (GstPad * pad)
|
|
{
|
|
GstRealPad *rpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
if (GST_RPAD_FORMATSFUNC (rpad))
|
|
return GST_RPAD_FORMATSFUNC (rpad) (GST_PAD (pad));
|
|
|
|
return NULL;
|
|
}
|