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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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31d748d332
Original commit message from CVS: s/GstBuffer/GstData/ in the API where you can pass events. Fix the plugins to deal with that. Fixes #113488. Also includes scheduler patches, and probably fixes some queue bugs relating to events and buffers.
3242 lines
90 KiB
C
3242 lines
90 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 "gstutils.h"
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#include "gstelement.h"
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#include "gsttype.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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enum {
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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 gboolean gst_pad_try_relink_filtered_func (GstRealPad *srcpad, GstRealPad *sinkpad,
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GstCaps *caps, gboolean clear);
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static void gst_pad_set_pad_template (GstPad *pad, GstPadTemplate *templ);
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#ifndef GST_DISABLE_LOADSAVE
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static xmlNodePtr gst_pad_save_thyself (GstObject *object, xmlNodePtr parent);
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#endif
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static GstObject *pad_parent_class = NULL;
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GType
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gst_pad_get_type (void)
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{
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if (!_gst_pad_type) {
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static const GTypeInfo pad_info = {
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sizeof (GstPadClass), NULL, NULL,
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(GClassInitFunc) gst_pad_class_init, NULL, NULL,
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sizeof (GstPad),
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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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REAL_CAPS_NEGO_FAILED,
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REAL_LINKED,
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REAL_UNLINKED,
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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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REAL_ARG_0,
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REAL_ARG_CAPS,
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REAL_ARG_ACTIVE,
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/* FILL ME */
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};
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static void gst_real_pad_class_init (GstRealPadClass *klass);
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static void gst_real_pad_init (GstRealPad *pad);
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static void gst_real_pad_dispose (GObject *object);
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static void gst_real_pad_set_property (GObject *object, guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gst_real_pad_get_property (GObject *object, guint prop_id,
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GValue *value,
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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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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_CAPS_NEGO_FAILED] =
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g_signal_new ("caps_nego_failed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstRealPadClass, caps_nego_failed), NULL, NULL,
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gst_marshal_VOID__POINTER, G_TYPE_NONE, 1,
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G_TYPE_POINTER);
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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__POINTER, G_TYPE_NONE, 1,
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G_TYPE_POINTER);
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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__POINTER, G_TYPE_NONE, 1,
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G_TYPE_POINTER);
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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 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->bufferpoolfunc = 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->convertfunc = gst_pad_convert_default;
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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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/**
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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,
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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,
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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 (templ != NULL, NULL);
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pad = gst_pad_new (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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/**
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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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return GST_PAD_DIRECTION (pad);
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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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if (old != active)
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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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/**
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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 (pad != NULL, NULL);
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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 #GstPad to set the chain function for.
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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.
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*/
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void
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gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain)
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{
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g_return_if_fail (pad != NULL);
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g_return_if_fail (GST_IS_REAL_PAD (pad));
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g_return_if_fail (GST_RPAD_DIRECTION (pad) == GST_PAD_SINK);
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GST_RPAD_CHAINFUNC (pad) = chain;
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GST_CAT_DEBUG (GST_CAT_PADS, "chainfunc for %s:%s set to %s",
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GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (chain));
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}
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/**
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* gst_pad_set_get_function:
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* @pad: a #GstPad to set the get function for.
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* @get: the #GstPadGetFunction to set.
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*
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* Sets the given get function for the pad.
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*/
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void
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gst_pad_set_get_function (GstPad *pad,
|
|
GstPadGetFunction get)
|
|
{
|
|
g_return_if_fail (pad != NULL);
|
|
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 #GstPad to set the event handler for.
|
|
* @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 #GstPad to set the event mask function for.
|
|
* @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 to get the event mask for.
|
|
*
|
|
* Gets the array of eventmasks from the given pad.
|
|
*
|
|
* Returns: an array with eventmasks, the list is ended
|
|
* with 0
|
|
*/
|
|
const GstEventMask*
|
|
gst_pad_get_event_masks (GstPad *pad)
|
|
{
|
|
GstRealPad *rpad;
|
|
|
|
if (pad == NULL)
|
|
return FALSE;
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
g_return_val_if_fail (rpad, FALSE);
|
|
|
|
if (GST_RPAD_EVENTMASKFUNC (rpad))
|
|
return GST_RPAD_EVENTMASKFUNC (rpad) (GST_PAD_CAST (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 to get the event mask for.
|
|
*
|
|
* Invokes the default event masks dispatcher on the pad.
|
|
*
|
|
* Returns: an array with eventmasks, the list is ended
|
|
* with 0
|
|
*/
|
|
const GstEventMask*
|
|
gst_pad_get_event_masks_default (GstPad *pad)
|
|
{
|
|
GstEventMask *result = NULL;
|
|
|
|
gst_pad_dispatcher (pad, (GstPadDispatcherFunction)
|
|
gst_pad_get_event_masks_dispatcher, &result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_convert_function:
|
|
* @pad: a #GstPad to set the convert function for.
|
|
* @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 (pad != NULL);
|
|
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: the #GstPad to set the query function for.
|
|
* @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 (pad != NULL);
|
|
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: the #GstPad to set the query type function for.
|
|
* @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 (pad != NULL);
|
|
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: the #GstPad to query
|
|
*
|
|
* Get an array of supported queries that can be performed
|
|
* on this pad.
|
|
*
|
|
* Returns: an array of querytypes anded with 0.
|
|
*/
|
|
const GstQueryType*
|
|
gst_pad_get_query_types (GstPad *pad)
|
|
{
|
|
GstRealPad *rpad;
|
|
|
|
if (pad == NULL)
|
|
return FALSE;
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
g_return_val_if_fail (rpad, FALSE);
|
|
|
|
if (GST_RPAD_QUERYTYPEFUNC (rpad))
|
|
return GST_RPAD_QUERYTYPEFUNC (rpad) (GST_PAD_CAST (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: the #GstPad to query
|
|
*
|
|
* Invoke the default dispatcher for the query types on
|
|
* the pad.
|
|
*
|
|
* Returns: an array of querytypes anded with 0.
|
|
*/
|
|
const GstQueryType*
|
|
gst_pad_get_query_types_default (GstPad *pad)
|
|
{
|
|
GstQueryType *result = NULL;
|
|
|
|
gst_pad_dispatcher (pad, (GstPadDispatcherFunction)
|
|
gst_pad_get_query_types_dispatcher, &result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_internal_link_function:
|
|
* @pad: a #GstPad to set the internal link function for.
|
|
* @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 (pad != NULL);
|
|
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: the #GstPad to set the formats function for.
|
|
* @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 (pad != NULL);
|
|
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 #GstPad to set the link function for.
|
|
* @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.
|
|
*/
|
|
void
|
|
gst_pad_set_link_function (GstPad *pad,
|
|
GstPadLinkFunction link)
|
|
{
|
|
g_return_if_fail (pad != NULL);
|
|
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 #GstPad to set the unlink function for.
|
|
* @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 (pad != NULL);
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
|
|
GST_RPAD_UNLINKFUNC (pad) = unlink;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "unlinkfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (unlink));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_getcaps_function:
|
|
* @pad: a #GstPad to set the getcaps function for.
|
|
* @getcaps: the #GstPadGetCapsFunction to set.
|
|
*
|
|
* Sets the given getcaps function for the pad.
|
|
*/
|
|
void
|
|
gst_pad_set_getcaps_function (GstPad *pad,
|
|
GstPadGetCapsFunction getcaps)
|
|
{
|
|
g_return_if_fail (pad != NULL);
|
|
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_bufferpool_function:
|
|
* @pad: a #GstPad to set the bufferpool function for.
|
|
* @bufpool: the #GstPadBufferPoolFunction to set.
|
|
*
|
|
* Sets the given bufferpool function for the pad. Note that the
|
|
* bufferpool function can only be set on sinkpads.
|
|
*/
|
|
void
|
|
gst_pad_set_bufferpool_function (GstPad *pad,
|
|
GstPadBufferPoolFunction bufpool)
|
|
{
|
|
g_return_if_fail (pad != NULL);
|
|
g_return_if_fail (GST_IS_REAL_PAD (pad));
|
|
g_return_if_fail (GST_PAD_IS_SINK (pad));
|
|
|
|
GST_RPAD_BUFFERPOOLFUNC (pad) = bufpool;
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "bufferpoolfunc for %s:%s set to %s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_FUNCPTR_NAME (bufpool));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_unlink:
|
|
* @srcpad: the source #GstPad to unlink.
|
|
* @sinkpad: the sink #GstPad to unlink.
|
|
*
|
|
* Unlinks the source pad from the sink pad.
|
|
*/
|
|
void
|
|
gst_pad_unlink (GstPad *srcpad,
|
|
GstPad *sinkpad)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
GstScheduler *src_sched, *sink_sched;
|
|
|
|
/* generic checks */
|
|
g_return_if_fail (srcpad != NULL);
|
|
g_return_if_fail (GST_IS_PAD (srcpad));
|
|
g_return_if_fail (sinkpad != NULL);
|
|
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);
|
|
|
|
/* now we need to deal with the real/ghost stuff */
|
|
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 (srcpad)) {
|
|
GST_RPAD_UNLINKFUNC (srcpad) (srcpad);
|
|
}
|
|
if (GST_RPAD_UNLINKFUNC (sinkpad)) {
|
|
GST_RPAD_UNLINKFUNC (sinkpad) (sinkpad);
|
|
}
|
|
|
|
/* get the schedulers before we unlink */
|
|
src_sched = gst_pad_get_scheduler (GST_PAD_CAST (realsrc));
|
|
sink_sched = gst_pad_get_scheduler (GST_PAD_CAST (realsink));
|
|
|
|
/* first clear peers */
|
|
GST_RPAD_PEER (realsrc) = NULL;
|
|
GST_RPAD_PEER (realsink) = NULL;
|
|
|
|
/* reset the filters, both filters are refcounted once */
|
|
if (GST_RPAD_FILTER (realsrc)) {
|
|
gst_caps_replace (&GST_RPAD_FILTER (realsink), NULL);
|
|
gst_caps_replace (&GST_RPAD_FILTER (realsrc), NULL);
|
|
}
|
|
|
|
/* now tell the scheduler */
|
|
if (src_sched && src_sched == sink_sched) {
|
|
gst_scheduler_pad_unlink (src_sched,
|
|
GST_PAD_CAST (realsrc),
|
|
GST_PAD_CAST (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));
|
|
}
|
|
|
|
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_CAST (realsrc));
|
|
sink_sched = gst_pad_get_scheduler (GST_PAD_CAST (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;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* Returns: TRUE if the pads can be linked, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_can_link_filtered (GstPad *srcpad, GstPad *sinkpad,
|
|
GstCaps *filtercaps)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
|
|
/* 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);
|
|
|
|
/* now we need to deal with the real/ghost stuff */
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsrc) == NULL, FALSE);
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsink) == NULL, FALSE);
|
|
g_return_val_if_fail (GST_PAD_PARENT (realsrc) != NULL, FALSE);
|
|
g_return_val_if_fail (GST_PAD_PARENT (realsink) != NULL, FALSE);
|
|
|
|
if (!gst_pad_check_schedulers (realsrc, realsink)) {
|
|
g_warning ("linking pads with different scheds requires "
|
|
"exactly one decoupled element (queue)");
|
|
return FALSE;
|
|
}
|
|
|
|
/* check if the directions are compatible */
|
|
if (!(((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SINK) &&
|
|
(GST_RPAD_DIRECTION (realsink) == GST_PAD_SRC)) ||
|
|
((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) &&
|
|
(GST_RPAD_DIRECTION (realsink) == GST_PAD_SINK))))
|
|
return FALSE;
|
|
|
|
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 link.
|
|
*
|
|
* 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. This function sinks the caps.
|
|
*
|
|
* Returns: TRUE if the pads have been linked, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_link_filtered (GstPad *srcpad, GstPad *sinkpad, GstCaps *filtercaps)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
GstScheduler *src_sched, *sink_sched;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* check for reversed directions and swap if necessary */
|
|
if ((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SINK) &&
|
|
(GST_RPAD_DIRECTION (realsink) == GST_PAD_SRC)) {
|
|
GstRealPad *temppad;
|
|
|
|
temppad = realsrc;
|
|
realsrc = realsink;
|
|
realsink = temppad;
|
|
}
|
|
if (GST_RPAD_DIRECTION (realsrc) != GST_PAD_SRC) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real src pad %s:%s is not a source pad, failed",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
return FALSE;
|
|
}
|
|
if (GST_RPAD_DIRECTION (realsink) != GST_PAD_SINK) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s is not a sink pad, failed",
|
|
GST_DEBUG_PAD_NAME (realsink));
|
|
return FALSE;
|
|
}
|
|
/* first set peers */
|
|
GST_RPAD_PEER (realsrc) = realsink;
|
|
GST_RPAD_PEER (realsink) = realsrc;
|
|
|
|
/* try to negotiate the pads, we don't need to clear the caps here */
|
|
if (!gst_pad_try_relink_filtered_func (realsrc, realsink,
|
|
filtercaps, FALSE)) {
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "relink_filtered_func failed, can't link");
|
|
|
|
GST_RPAD_PEER (realsrc) = NULL;
|
|
GST_RPAD_PEER (realsink) = NULL;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* fire off a signal to each of the pads telling them
|
|
* that they've been linked */
|
|
g_signal_emit (G_OBJECT (realsrc), gst_real_pad_signals[REAL_LINKED],
|
|
0, realsink);
|
|
g_signal_emit (G_OBJECT (realsink), gst_real_pad_signals[REAL_LINKED],
|
|
0, realsrc);
|
|
|
|
src_sched = gst_pad_get_scheduler (GST_PAD_CAST (realsrc));
|
|
sink_sched = gst_pad_get_scheduler (GST_PAD_CAST (realsink));
|
|
|
|
/* now tell the scheduler */
|
|
if (src_sched && src_sched == sink_sched) {
|
|
gst_scheduler_pad_link (src_sched,
|
|
GST_PAD_CAST (realsrc), GST_PAD_CAST (realsink));
|
|
}
|
|
else {
|
|
GST_CAT_INFO (GST_CAT_PADS, "not telling link to scheduler %s:%s and %s:%s, %p %p",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad),
|
|
src_sched, sink_sched);
|
|
}
|
|
|
|
GST_CAT_INFO (GST_CAT_PADS, "linked %s:%s and %s:%s, successful",
|
|
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (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);
|
|
}
|
|
|
|
/**
|
|
* gst_pad_set_parent:
|
|
* @pad: a #GstPad to set the parent of.
|
|
* @parent: the new parent #GstElement.
|
|
*
|
|
* Sets the parent object of a pad.
|
|
*/
|
|
void
|
|
gst_pad_set_parent (GstPad *pad, GstElement *parent)
|
|
{
|
|
g_return_if_fail (pad != NULL);
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (GST_PAD_PARENT (pad) == NULL);
|
|
g_return_if_fail (parent != NULL);
|
|
g_return_if_fail (GST_IS_OBJECT (parent));
|
|
g_return_if_fail ((gpointer) pad != (gpointer) parent);
|
|
|
|
gst_object_set_parent (GST_OBJECT (pad), GST_OBJECT (parent));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_parent:
|
|
* @pad: the #GstPad to get the parent of.
|
|
*
|
|
* Gets the parent object of this pad.
|
|
*
|
|
* 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 to get the pad template of.
|
|
*
|
|
* Gets the pad template object of this pad.
|
|
*
|
|
* Returns: the #GstPadTemplate from which this pad was instantiated.
|
|
*/
|
|
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.
|
|
*/
|
|
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_CAST (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 (pad != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
return GST_PAD_PARENT (GST_PAD (GST_PAD_REALIZE (pad)));
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
void
|
|
gst_pad_add_ghost_pad (GstPad *pad,
|
|
GstPad *ghostpad)
|
|
{
|
|
GstRealPad *realpad;
|
|
|
|
g_return_if_fail (pad != NULL);
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (ghostpad != NULL);
|
|
g_return_if_fail (GST_IS_GHOST_PAD (ghostpad));
|
|
|
|
realpad = GST_PAD_REALIZE (pad);
|
|
|
|
realpad->ghostpads = g_list_prepend (realpad->ghostpads, ghostpad);
|
|
}
|
|
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
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);
|
|
|
|
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 (pad != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
return GST_PAD_REALIZE(pad)->ghostpads;
|
|
}
|
|
|
|
/* an internal caps negotiation helper function:
|
|
*
|
|
* 1. optionally calls the pad link function with the provided caps
|
|
* 2. deals with the result code of the link function
|
|
* 3. sets fixed caps on the pad.
|
|
*/
|
|
static GstPadLinkReturn
|
|
gst_pad_try_set_caps_func (GstRealPad *pad, GstCaps *caps, gboolean notify)
|
|
{
|
|
GstCaps *allowed = NULL;
|
|
GstPadTemplate *template;
|
|
GstElement *parent = GST_PAD_PARENT (pad);
|
|
|
|
g_return_val_if_fail (pad != NULL, GST_PAD_LINK_REFUSED);
|
|
g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_LINK_REFUSED);
|
|
|
|
/* if this pad has a parent and the parent is not READY, delay the
|
|
* negotiation */
|
|
if (parent && GST_STATE (parent) < GST_STATE_READY)
|
|
{
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "parent %s of pad %s:%s is not READY",
|
|
GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (pad));
|
|
return GST_PAD_LINK_DELAYED;
|
|
}
|
|
|
|
GST_CAT_INFO (GST_CAT_CAPS, "trying to set caps %p on pad %s:%s",
|
|
caps, GST_DEBUG_PAD_NAME (pad));
|
|
|
|
/* first see if we have to check against a filter, we ref the caps here as we're
|
|
* going to unref it later on */
|
|
if (!(allowed = gst_caps_ref (GST_RPAD_FILTER (pad)))) {
|
|
/* no filter, make sure we check against the padtemplate then */
|
|
if ((template = gst_pad_get_pad_template (GST_PAD_CAST (pad)))) {
|
|
allowed = gst_pad_template_get_caps (template);
|
|
}
|
|
}
|
|
|
|
/* do we have to check the caps against something? */
|
|
if (allowed) {
|
|
GstCaps *intersection;
|
|
|
|
/* check against calculated caps */
|
|
intersection = gst_caps_intersect (caps, allowed);
|
|
|
|
/* oops, empty intersection, caps don"t have anything in common */
|
|
if (!intersection) {
|
|
GST_CAT_INFO (GST_CAT_CAPS, "caps did not intersect with %s:%s's allowed caps",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
gst_caps_debug (caps, "caps themselves (attemped to set)");
|
|
gst_caps_debug (allowed,
|
|
"allowed caps that did not agree with caps");
|
|
gst_caps_unref (allowed);
|
|
return GST_PAD_LINK_REFUSED;
|
|
}
|
|
/* caps checks out fine, we can unref the intersection now */
|
|
gst_caps_unref (intersection);
|
|
gst_caps_unref (allowed);
|
|
/* given that the caps are fixed, we know that their intersection with the
|
|
* padtemplate caps is the same as caps itself */
|
|
}
|
|
|
|
/* we need to notify the link function */
|
|
if (notify && GST_RPAD_LINKFUNC (pad)) {
|
|
GstPadLinkReturn res;
|
|
gchar *debug_string;
|
|
gboolean negotiating;
|
|
|
|
GST_CAT_INFO (GST_CAT_CAPS, "calling link function on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
negotiating = GST_FLAG_IS_SET (pad, GST_PAD_NEGOTIATING);
|
|
|
|
/* set the NEGOTIATING flag if not already done */
|
|
if (!negotiating)
|
|
GST_FLAG_SET (pad, GST_PAD_NEGOTIATING);
|
|
|
|
/* call the link function */
|
|
res = GST_RPAD_LINKFUNC (pad) (GST_PAD (pad), caps);
|
|
|
|
/* unset again after negotiating only if we set it */
|
|
if (!negotiating)
|
|
GST_FLAG_UNSET (pad, GST_PAD_NEGOTIATING);
|
|
|
|
switch (res) {
|
|
case GST_PAD_LINK_REFUSED:
|
|
debug_string = "REFUSED";
|
|
break;
|
|
case GST_PAD_LINK_OK:
|
|
debug_string = "OK";
|
|
break;
|
|
case GST_PAD_LINK_DONE:
|
|
debug_string = "DONE";
|
|
break;
|
|
case GST_PAD_LINK_DELAYED:
|
|
debug_string = "DELAYED";
|
|
break;
|
|
default:
|
|
g_warning ("unknown return code from link function of pad %s:%s %d",
|
|
GST_DEBUG_PAD_NAME (pad), res);
|
|
return GST_PAD_LINK_REFUSED;
|
|
}
|
|
|
|
GST_CAT_INFO (GST_CAT_CAPS,
|
|
"got reply %s (%d) from link function on pad %s:%s",
|
|
debug_string, res, GST_DEBUG_PAD_NAME (pad));
|
|
|
|
/* done means the link function called another caps negotiate function
|
|
* on this pad that succeeded, we dont need to continue */
|
|
if (res == GST_PAD_LINK_DONE) {
|
|
GST_CAT_INFO (GST_CAT_CAPS, "pad %s:%s is done", GST_DEBUG_PAD_NAME (pad));
|
|
return GST_PAD_LINK_DONE;
|
|
}
|
|
if (res == GST_PAD_LINK_REFUSED) {
|
|
GST_CAT_INFO (GST_CAT_CAPS, "pad %s:%s doesn't accept caps",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
return GST_PAD_LINK_REFUSED;
|
|
}
|
|
}
|
|
/* we can only set caps on the pad if they are fixed */
|
|
if (GST_CAPS_IS_FIXED (caps)) {
|
|
|
|
GST_CAT_INFO (GST_CAT_CAPS, "setting caps on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
/* if we got this far all is ok, remove the old caps, set the new one */
|
|
gst_caps_replace_sink (&GST_PAD_CAPS (pad), caps);
|
|
|
|
g_object_notify (G_OBJECT (pad), "caps");
|
|
}
|
|
else {
|
|
GST_CAT_INFO (GST_CAT_CAPS,
|
|
"caps are not fixed on pad %s:%s, not setting them yet",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
return GST_PAD_LINK_DELAYED;
|
|
}
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_try_set_caps:
|
|
* @pad: a #GstPad to try to set the caps on.
|
|
* @caps: the #GstCaps to set.
|
|
*
|
|
* Tries to set the caps on the given pad. Ownership is always taken
|
|
* of the caps, so you will need to unref non-floating caps.
|
|
*
|
|
* Returns: A #GstPadLinkReturn value indicating whether the caps
|
|
* could be set.
|
|
*/
|
|
GstPadLinkReturn
|
|
gst_pad_try_set_caps (GstPad *pad, GstCaps *caps)
|
|
{
|
|
GstRealPad *peer, *realpad;
|
|
GstPadLinkReturn set_retval;
|
|
|
|
realpad = GST_PAD_REALIZE (pad);
|
|
peer = GST_RPAD_PEER (realpad);
|
|
|
|
GST_CAT_INFO (GST_CAT_CAPS, "trying to set caps %p on pad %s:%s",
|
|
caps, GST_DEBUG_PAD_NAME (realpad));
|
|
|
|
gst_caps_debug (caps, "caps that we are trying to set");
|
|
|
|
/* try to take ownership */
|
|
gst_caps_ref (caps);
|
|
gst_caps_sink (caps);
|
|
|
|
/* 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 (realpad));
|
|
g_warning ("trying to set non fixed caps on pad %s:%s, not allowed",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
|
|
gst_caps_debug (caps, "unfixed caps");
|
|
set_retval = GST_PAD_LINK_DELAYED;
|
|
goto done;
|
|
}
|
|
|
|
/* if we have a peer try to set the caps, notifying the peerpad
|
|
* if it has a link function */
|
|
if (peer && ((set_retval = gst_pad_try_set_caps_func (peer, caps, TRUE)) <= 0))
|
|
{
|
|
GST_CAT_INFO (GST_CAT_CAPS, "tried to set caps on peerpad %s:%s but couldn't, return value %d",
|
|
GST_DEBUG_PAD_NAME (peer), set_retval);
|
|
goto done;
|
|
}
|
|
|
|
/* then try to set our own caps, we don't need to be notified */
|
|
if ((set_retval = gst_pad_try_set_caps_func (realpad, caps, FALSE)) <= 0)
|
|
{
|
|
GST_CAT_INFO (GST_CAT_CAPS, "tried to set own caps on pad %s:%s but couldn't, return value %d",
|
|
GST_DEBUG_PAD_NAME (realpad), set_retval);
|
|
goto done;
|
|
}
|
|
GST_CAT_INFO (GST_CAT_CAPS, "succeeded setting caps %p on pad %s:%s, return value %d",
|
|
caps, GST_DEBUG_PAD_NAME (realpad), set_retval);
|
|
g_assert (GST_PAD_CAPS (pad));
|
|
|
|
done:
|
|
/* if we took ownership, the caps will be freed */
|
|
gst_caps_unref (caps);
|
|
|
|
return set_retval;
|
|
}
|
|
|
|
/* this is a caps negotiation convenience routine, it:
|
|
*
|
|
* 1. optionally clears any pad caps.
|
|
* 2. calculates the intersection between the two pad tamplate/getcaps caps.
|
|
* 3. calculates the intersection with the (optional) filtercaps.
|
|
* 4. stores the intersection in the pad filter.
|
|
* 5. stores the app filtercaps in the pad appfilter.
|
|
* 6. starts the caps negotiation.
|
|
*/
|
|
static gboolean
|
|
gst_pad_try_relink_filtered_func (GstRealPad *srcpad, GstRealPad *sinkpad,
|
|
GstCaps *filtercaps, gboolean clear)
|
|
{
|
|
GstCaps *srccaps, *sinkcaps;
|
|
GstCaps *intersection = NULL;
|
|
GstRealPad *realsrc, *realsink;
|
|
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsrc) != NULL, FALSE);
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsink) == realsrc, FALSE);
|
|
|
|
/* optinally clear the caps */
|
|
if (clear) {
|
|
GST_CAT_INFO (GST_CAT_PADS,
|
|
"start relink filtered %s:%s and %s:%s, clearing caps",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
|
|
gst_caps_replace (&GST_PAD_CAPS (GST_PAD (realsrc)), NULL);
|
|
gst_caps_replace (&GST_PAD_CAPS (GST_PAD (realsink)), NULL);
|
|
gst_caps_replace (&GST_RPAD_FILTER (realsrc), NULL);
|
|
gst_caps_replace (&GST_RPAD_FILTER (realsink), NULL);
|
|
}
|
|
else {
|
|
GST_CAT_INFO (GST_CAT_PADS, "start relink filtered %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
}
|
|
|
|
srccaps = gst_pad_get_caps (GST_PAD (realsrc));
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "dumping caps of pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
gst_caps_debug (srccaps, "caps of src pad (pre-relink)");
|
|
sinkcaps = gst_pad_get_caps (GST_PAD (realsink));
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "dumping caps of pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (realsink));
|
|
gst_caps_debug (sinkcaps, "caps of sink pad (pre-relink)");
|
|
|
|
/* first take the intersection of the pad caps */
|
|
intersection = gst_caps_intersect (srccaps, sinkcaps);
|
|
gst_caps_debug (intersection, "caps of intersection");
|
|
|
|
/* if we have no intersection but one of the caps was not NULL.. */
|
|
if (!intersection && (srccaps || sinkcaps)) {
|
|
/* the intersection is NULL but the pad caps were not both NULL,
|
|
* this means they have no common format */
|
|
GST_CAT_INFO (GST_CAT_PADS, "pads %s:%s and %s:%s have no common type",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
/* make sure any floating caps from gst_pad_get_caps are freed here */
|
|
gst_caps_sink (srccaps);
|
|
gst_caps_sink (sinkcaps);
|
|
return FALSE;
|
|
} else {
|
|
GST_CAT_INFO (GST_CAT_PADS, "pads %s:%s and %s:%s intersected to %s caps",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink),
|
|
(intersection ?
|
|
(GST_CAPS_IS_FIXED (intersection) ? "fixed" : "variable") :
|
|
"NULL"));
|
|
|
|
/* we don't need those anymore, as the caps can be floating */
|
|
gst_caps_sink (srccaps);
|
|
gst_caps_sink (sinkcaps);
|
|
|
|
/* then filter this against the app filter */
|
|
if (filtercaps) {
|
|
GstCaps *filtered_intersection;
|
|
|
|
filtered_intersection = gst_caps_intersect (intersection,
|
|
filtercaps);
|
|
|
|
gst_caps_sink (intersection);
|
|
|
|
if (!filtered_intersection) {
|
|
GST_CAT_INFO (GST_CAT_PADS,
|
|
"filtered link between pads %s:%s and %s:%s is empty",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
return FALSE;
|
|
}
|
|
intersection = filtered_intersection;
|
|
|
|
/* keep a reference to the app caps */
|
|
gst_caps_replace_sink (&GST_RPAD_APPFILTER (realsink), filtercaps);
|
|
gst_caps_replace_sink (&GST_RPAD_APPFILTER (realsrc), filtercaps);
|
|
}
|
|
}
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "setting filter for link to:");
|
|
gst_caps_debug (intersection, "filter for link");
|
|
|
|
/* both the app filter and the filter, while stored on both peer pads,
|
|
* are equal to the same thing on both */
|
|
gst_caps_replace_sink (&GST_RPAD_FILTER (realsrc), intersection);
|
|
gst_caps_replace_sink (&GST_RPAD_FILTER (realsink), intersection);
|
|
gst_caps_sink (intersection);
|
|
|
|
return gst_pad_perform_negotiate (GST_PAD (realsrc), GST_PAD (realsink));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_perform_negotiate:
|
|
* @srcpad: the source #GstPad.
|
|
* @sinkpad: the sink #GstPad.
|
|
*
|
|
* Tries to negotiate the pads.
|
|
*
|
|
* Returns: TRUE if the pads were succesfully negotiated, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_perform_negotiate (GstPad *srcpad, GstPad *sinkpad)
|
|
{
|
|
GstCaps *intersection, *filtered_intersection;
|
|
GstRealPad *realsrc, *realsink;
|
|
GstCaps *srccaps, *sinkcaps, *filter;
|
|
gboolean res = TRUE;
|
|
GstElement *parent;
|
|
|
|
|
|
g_return_val_if_fail (srcpad != NULL, FALSE);
|
|
g_return_val_if_fail (sinkpad != NULL, FALSE);
|
|
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsrc) != NULL, FALSE);
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsink) == realsrc, FALSE);
|
|
|
|
/* shortcut negotiation */
|
|
parent = GST_PAD_PARENT (realsrc);
|
|
if (parent && GST_STATE (parent) < GST_STATE_READY) {
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "parent %s of pad %s:%s is not READY",
|
|
GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (realsrc));
|
|
return TRUE;
|
|
}
|
|
parent = GST_PAD_PARENT (realsink);
|
|
if (parent && GST_STATE (parent) < GST_STATE_READY) {
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "parent %s of pad %s:%s is not READY",
|
|
GST_ELEMENT_NAME (parent), GST_DEBUG_PAD_NAME (realsink));
|
|
return TRUE;
|
|
}
|
|
|
|
GST_CAT_INFO (GST_CAT_PADS, "perform negotiate for link %s:%s-%s:%s",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
|
|
filter = GST_RPAD_APPFILTER (realsrc);
|
|
if (filter) {
|
|
GST_CAT_INFO (GST_CAT_PADS, "dumping filter for link %s:%s-%s:%s",
|
|
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
|
|
gst_caps_debug (filter, "link filter caps");
|
|
}
|
|
|
|
/* calculate the new caps here */
|
|
srccaps = gst_pad_get_caps (GST_PAD (realsrc));
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "dumping caps of pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (realsrc));
|
|
gst_caps_debug (srccaps,
|
|
"src caps, awaiting negotiation, after applying filter");
|
|
sinkcaps = gst_pad_get_caps (GST_PAD (realsink));
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "dumping caps of pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (realsink));
|
|
gst_caps_debug (sinkcaps,
|
|
"sink caps, awaiting negotiation, after applying filter");
|
|
intersection = gst_caps_intersect (srccaps, sinkcaps);
|
|
filtered_intersection = gst_caps_intersect (intersection, filter);
|
|
gst_caps_unref (intersection);
|
|
|
|
/* no negotiation is performed if the pads have filtercaps */
|
|
if (filtered_intersection) {
|
|
GstPadLinkReturn link_res;
|
|
|
|
link_res = gst_pad_try_set_caps_func (realsrc, filtered_intersection, TRUE);
|
|
if (link_res == GST_PAD_LINK_REFUSED)
|
|
goto error;
|
|
if (link_res == GST_PAD_LINK_DONE)
|
|
goto success;
|
|
|
|
link_res = gst_pad_try_set_caps_func (realsink, filtered_intersection, TRUE);
|
|
if (link_res == GST_PAD_LINK_REFUSED)
|
|
goto error;
|
|
if (link_res == GST_PAD_LINK_DONE)
|
|
goto success;
|
|
}
|
|
/* no filtered_intersection, some pads had caps and ther was a filter */
|
|
else if ((srccaps || sinkcaps) && filter) {
|
|
goto error;
|
|
}
|
|
|
|
success:
|
|
cleanup:
|
|
gst_caps_sink (srccaps);
|
|
gst_caps_sink (sinkcaps);
|
|
gst_caps_unref (filtered_intersection);
|
|
return res;
|
|
|
|
error:
|
|
res = FALSE;
|
|
goto cleanup;
|
|
}
|
|
|
|
/**
|
|
* 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,
|
|
GstCaps *filtercaps)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
|
|
g_return_val_if_fail (srcpad != NULL, FALSE);
|
|
g_return_val_if_fail (sinkpad != NULL, FALSE);
|
|
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsrc) != NULL, FALSE);
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsink) == realsrc, FALSE);
|
|
|
|
return gst_pad_try_relink_filtered_func (realsrc, realsink,
|
|
filtercaps, 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,
|
|
GstCaps *filtercaps)
|
|
{
|
|
GstRealPad *realsrc, *realsink;
|
|
|
|
g_return_val_if_fail (srcpad != NULL, FALSE);
|
|
g_return_val_if_fail (sinkpad != NULL, FALSE);
|
|
|
|
realsrc = GST_PAD_REALIZE (srcpad);
|
|
realsink = GST_PAD_REALIZE (sinkpad);
|
|
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsrc) != NULL, FALSE);
|
|
g_return_val_if_fail (GST_RPAD_PEER (realsink) == realsrc, FALSE);
|
|
|
|
if (!gst_pad_try_relink_filtered_func (realsrc, realsink,
|
|
filtercaps, TRUE))
|
|
{
|
|
gst_pad_unlink (srcpad, GST_PAD (GST_PAD_PEER (srcpad)));
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* 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, GstCaps *caps)
|
|
{
|
|
GstRealPad *peer, *realpad;
|
|
|
|
realpad = GST_PAD_REALIZE (pad);
|
|
|
|
peer = GST_RPAD_PEER (realpad);
|
|
|
|
GST_CAT_INFO (GST_CAT_CAPS, "proxy link to pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (realpad));
|
|
|
|
if (peer && gst_pad_try_set_caps_func (peer, caps, TRUE) < 0)
|
|
return GST_PAD_LINK_REFUSED;
|
|
if (gst_pad_try_set_caps_func (realpad, caps, FALSE) < 0)
|
|
return GST_PAD_LINK_REFUSED;
|
|
|
|
if (peer) {
|
|
gst_caps_debug (caps, "proxy link filter");
|
|
|
|
GST_CAT_INFO (GST_CAT_CAPS, "setting filter on %s:%s and %s:%s",
|
|
GST_DEBUG_PAD_NAME (peer), GST_DEBUG_PAD_NAME (realpad));
|
|
|
|
gst_caps_replace_sink (&GST_RPAD_FILTER (peer), caps);
|
|
gst_caps_replace_sink (&GST_RPAD_FILTER (realpad), caps);
|
|
}
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
/**
|
|
* 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 potentially
|
|
* returns a floating caps, so use gst_caps_sink to get rid of
|
|
* it.
|
|
*/
|
|
GstCaps*
|
|
gst_pad_get_caps (GstPad *pad)
|
|
{
|
|
GstRealPad *realpad;
|
|
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
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);
|
|
|
|
/* note that we will not _ref the caps here as this function might be
|
|
* called recursively */
|
|
if (GST_PAD_CAPS (realpad)) {
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "using pad real caps %p", GST_PAD_CAPS (realpad));
|
|
return GST_PAD_CAPS (realpad);
|
|
}
|
|
else if GST_RPAD_GETCAPSFUNC (realpad) {
|
|
GstCaps *caps;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "using pad get function");
|
|
caps = GST_RPAD_GETCAPSFUNC (realpad) (GST_PAD_CAST (realpad), NULL);
|
|
if(caps)g_return_val_if_fail(caps->refcount > 0, NULL);
|
|
|
|
return caps;
|
|
}
|
|
else if (GST_PAD_PAD_TEMPLATE (realpad)) {
|
|
GstPadTemplate *templ = GST_PAD_PAD_TEMPLATE (realpad);
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "using pad template %p with caps %p",
|
|
templ, GST_PAD_TEMPLATE_CAPS (templ));
|
|
return GST_PAD_TEMPLATE_CAPS (templ);
|
|
}
|
|
GST_CAT_DEBUG (GST_CAT_CAPS, "pad has no caps");
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_pad_template_caps:
|
|
* @pad: a #GstPad to get the template capabilities from.
|
|
*
|
|
* Gets the template capabilities of this pad.
|
|
*
|
|
* Returns: the template #GstCaps of this pad, unref the caps
|
|
* if you no longer need it.
|
|
*/
|
|
GstCaps*
|
|
gst_pad_get_pad_template_caps (GstPad *pad)
|
|
{
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
if (GST_PAD_PAD_TEMPLATE (pad))
|
|
return gst_caps_ref (GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (pad)));
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* 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 this pad template.
|
|
*
|
|
* Returns: the #GstCaps, or NULL if not found or in case of an error. unref
|
|
* the caps if you no longer need it.
|
|
*/
|
|
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;
|
|
|
|
return gst_caps_ref (gst_caps_get_by_name (caps, name));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_check_compatibility:
|
|
* @srcpad: the source #GstPad to check.
|
|
* @sinkpad: the sink #GstPad to check against.
|
|
*
|
|
* Checks if two pads have compatible capabilities.
|
|
*
|
|
* Returns: TRUE if they are compatible or if the capabilities
|
|
* could not be checked
|
|
*/
|
|
gboolean
|
|
gst_pad_check_compatibility (GstPad *srcpad, GstPad *sinkpad)
|
|
{
|
|
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);
|
|
|
|
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 pad of this pad.
|
|
*
|
|
* Returns: the peer #GstPad.
|
|
*/
|
|
GstPad*
|
|
gst_pad_get_peer (GstPad *pad)
|
|
{
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
return GST_PAD (GST_PAD_PEER (pad));
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_allowed_caps:
|
|
* @pad: a #GstPad to get the allowed caps of.
|
|
*
|
|
* Gets the capabilities of the allowed media types that can
|
|
* flow through this pad. The caller must free the resulting caps.
|
|
*
|
|
* Returns: the allowed #GstCaps of the pad link. unref the caps if
|
|
* you no longer need it.
|
|
*/
|
|
GstCaps*
|
|
gst_pad_get_allowed_caps (GstPad *pad)
|
|
{
|
|
GstCaps *caps;
|
|
GstRealPad *realpad;
|
|
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
realpad = GST_PAD_REALIZE (pad);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PROPERTIES, "get allowed caps of %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
caps = gst_caps_ref (GST_RPAD_FILTER (realpad));
|
|
|
|
return caps;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_recalc_allowed_caps:
|
|
* @pad: a #GstPad to recalculate the capablities of.
|
|
*
|
|
* Attempts to relink the pad to its peer through its filter,
|
|
* set with gst_pad_[re]link_filtered. This function is useful when a
|
|
* plug-in has new capabilities on a pad and wants to notify the peer.
|
|
*
|
|
* Returns: TRUE on success, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_pad_recalc_allowed_caps (GstPad *pad)
|
|
{
|
|
GstRealPad *peer;
|
|
|
|
g_return_val_if_fail (pad != NULL, FALSE);
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PROPERTIES, "set allowed caps of %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
|
|
peer = GST_RPAD_PEER (pad);
|
|
if (peer)
|
|
return gst_pad_try_relink_filtered (pad, GST_PAD (peer),
|
|
GST_RPAD_APPFILTER (pad));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* 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, GstCaps *allowed)
|
|
{
|
|
GstElement *parent;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
|
|
|
|
/* see if someone can resolve this */
|
|
if (g_signal_has_handler_pending (G_OBJECT (pad),
|
|
gst_real_pad_signals[REAL_CAPS_NEGO_FAILED], 0, FALSE))
|
|
{
|
|
/* clear pad caps first */
|
|
gst_caps_replace (&GST_PAD_CAPS (pad), NULL);
|
|
|
|
/* lets hope some signal manages to set the caps again */
|
|
g_signal_emit (G_OBJECT (pad), gst_real_pad_signals[REAL_CAPS_NEGO_FAILED], 0, allowed);
|
|
|
|
/* if the pad has caps now or is disabled, it's ok */
|
|
if (GST_PAD_CAPS (pad) != NULL || !GST_PAD_IS_ACTIVE (pad))
|
|
return TRUE;
|
|
}
|
|
|
|
/* report error */
|
|
parent = gst_pad_get_parent (pad);
|
|
gst_element_error (parent, "negotiation failed on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_get_bufferpool:
|
|
* @pad: a #GstPad to get the bufferpool from.
|
|
*
|
|
* Gets the bufferpool of the peer pad of the given pad.Note that
|
|
* a bufferpool can only be obtained from a srcpad.
|
|
*
|
|
* Returns: the #GstBufferPool, or NULL in case of an error.
|
|
*/
|
|
GstBufferPool*
|
|
gst_pad_get_bufferpool (GstPad *pad)
|
|
{
|
|
GstRealPad *peer;
|
|
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
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 NULL;
|
|
|
|
GST_CAT_DEBUG (GST_CAT_BUFFER, "(%s:%s): getting bufferpool", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
if (peer->bufferpoolfunc) {
|
|
GST_CAT_DEBUG (GST_CAT_PADS,
|
|
"calling bufferpoolfunc &%s (@%p) of peer pad %s:%s",
|
|
GST_DEBUG_FUNCPTR_NAME (peer->bufferpoolfunc),
|
|
&peer->bufferpoolfunc, GST_DEBUG_PAD_NAME (((GstPad*) peer)));
|
|
return (peer->bufferpoolfunc) (((GstPad*) peer));
|
|
} else {
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "no bufferpoolfunc for peer pad %s:%s at %p",
|
|
GST_DEBUG_PAD_NAME (((GstPad*) peer)), &peer->bufferpoolfunc);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
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 */
|
|
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))){
|
|
GST_CAT_DEBUG (GST_CAT_REFCOUNTING, "removing ghost pad from element '%s'",
|
|
GST_OBJECT_NAME (GST_OBJECT_PARENT (ghostpad)));
|
|
|
|
gst_element_remove_ghost_pad (GST_ELEMENT (GST_OBJECT_PARENT (ghostpad)), GST_PAD (ghostpad));
|
|
}
|
|
ghostpads = g_list_next (ghostpads);
|
|
}
|
|
g_list_free (orig);
|
|
g_list_free (GST_REAL_PAD(pad)->ghostpads);
|
|
}
|
|
|
|
gst_caps_replace (&GST_PAD_CAPS (pad), NULL);
|
|
gst_caps_replace (&GST_RPAD_APPFILTER (pad), NULL);
|
|
|
|
if (GST_IS_ELEMENT (GST_OBJECT_PARENT (pad))) {
|
|
GST_CAT_DEBUG (GST_CAT_REFCOUNTING, "removing pad from element '%s'",
|
|
GST_OBJECT_NAME (GST_OBJECT (GST_ELEMENT (GST_OBJECT_PARENT (pad)))));
|
|
|
|
gst_element_remove_pad (GST_ELEMENT (GST_OBJECT_PARENT (pad)), pad);
|
|
}
|
|
|
|
G_OBJECT_CLASS (real_pad_parent_class)->dispose (object);
|
|
}
|
|
|
|
|
|
#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 pad and ghost be switched ?
|
|
*/
|
|
/**
|
|
* 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 #GstPad to push the buffer out of.
|
|
* @data: the #GstData to push.
|
|
*
|
|
* Pushes a buffer or an event to the peer of the pad.
|
|
*/
|
|
void
|
|
gst_pad_push (GstPad *pad, GstData *data)
|
|
{
|
|
GstRealPad *peer;
|
|
|
|
g_assert (GST_IS_PAD (pad));
|
|
GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, pad, "pushing");
|
|
|
|
g_return_if_fail (GST_PAD_DIRECTION (pad) == GST_PAD_SRC);
|
|
|
|
if (!gst_probe_dispatcher_dispatch (&(GST_REAL_PAD (pad)->probedisp), &data))
|
|
return;
|
|
|
|
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_CAST (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 #GstPad to pull a buffer from.
|
|
*
|
|
* Pulls an event or a buffer from the peer pad.
|
|
*
|
|
* 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),
|
|
"pull on pad %s:%s but it was unlinked",
|
|
GST_ELEMENT_NAME (GST_PAD_PARENT (pad)),
|
|
GST_PAD_NAME (pad), NULL);
|
|
}
|
|
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_CAST (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),
|
|
"NULL buffer during pull on %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
} else {
|
|
gst_element_error (GST_PAD_PARENT (pad),
|
|
"internal error: 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_select:
|
|
* @padlist: a #GList of pads.
|
|
*
|
|
* Waits for a buffer on any of the list of pads.
|
|
*
|
|
* Returns: the #GstPad that has a buffer available.
|
|
* Use #gst_pad_pull() to get the buffer.
|
|
*/
|
|
GstPad*
|
|
gst_pad_select (GList *padlist)
|
|
{
|
|
GstPad *pad;
|
|
|
|
pad = gst_scheduler_pad_select (GST_PAD_PARENT (padlist->data)->sched,
|
|
padlist);
|
|
return pad;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_selectv:
|
|
* @pad: a first #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_selectv (GstPad *pad, ...)
|
|
{
|
|
GstPad *result;
|
|
GList *padlist = NULL;
|
|
va_list var_args;
|
|
|
|
if (pad == NULL)
|
|
return NULL;
|
|
|
|
va_start (var_args, pad);
|
|
|
|
while (pad) {
|
|
padlist = g_list_prepend (padlist, pad);
|
|
pad = va_arg (var_args, GstPad *);
|
|
}
|
|
result = gst_pad_select (padlist);
|
|
g_list_free (padlist);
|
|
|
|
va_end (var_args);
|
|
|
|
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__POINTER, G_TYPE_NONE, 1,
|
|
G_TYPE_POINTER);
|
|
|
|
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));
|
|
gst_caps_unref (GST_PAD_TEMPLATE_CAPS (templ));
|
|
|
|
G_OBJECT_CLASS (padtemplate_parent_class)->dispose (object);
|
|
}
|
|
|
|
/* ALWAYS padtemplates cannot have conversion specifications, it doesn't make
|
|
* sense.
|
|
* SOMETIMES padtemplates can do whatever they want, they are provided by the
|
|
* element.
|
|
* REQUEST padtemplates can be reverse-parsed (the user asks for 'sink1', the
|
|
* 'sink%d' template is automatically selected), so we need to restrict their
|
|
* naming.
|
|
*/
|
|
static gboolean
|
|
name_is_valid (const gchar *name, GstPadPresence presence)
|
|
{
|
|
const gchar *str;
|
|
|
|
if (presence == GST_PAD_ALWAYS) {
|
|
if (strchr (name, '%')) {
|
|
g_warning ("invalid name template %s: conversion specifications are not"
|
|
" allowed for GST_PAD_ALWAYS padtemplates", name);
|
|
return FALSE;
|
|
}
|
|
} else if (presence == GST_PAD_REQUEST) {
|
|
if ((str = strchr (name, '%')) && strchr (str + 1, '%')) {
|
|
g_warning ("invalid name template %s: only one conversion specification"
|
|
" allowed in GST_PAD_REQUEST padtemplate", name);
|
|
return FALSE;
|
|
}
|
|
if (str && (*(str+1) != 's' && *(str+1) != 'd')) {
|
|
g_warning ("invalid name template %s: conversion specification must be of"
|
|
" type '%%d' or '%%s' for GST_PAD_REQUEST padtemplate", name);
|
|
return FALSE;
|
|
}
|
|
if (str && (*(str+2) != '\0')) {
|
|
g_warning ("invalid name template %s: conversion specification must"
|
|
" appear at the end of the GST_PAD_REQUEST padtemplate name",
|
|
name);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_pad_template_newv:
|
|
* @name_template: the name template.
|
|
* @direction: the #GstPadDirection of the template.
|
|
* @presence: the #GstPadPresence of the pad.
|
|
* @caps: a #GstCaps set for the template.
|
|
* @var_args: a NULL-terminated list of #GstCaps.
|
|
*
|
|
* Creates a new pad template with a name according to the given template
|
|
* and with the given arguments.
|
|
*
|
|
* Returns: a new #GstPadTemplate.
|
|
*/
|
|
GstPadTemplate*
|
|
gst_pad_template_newv (const gchar *name_template,
|
|
GstPadDirection direction, GstPadPresence presence,
|
|
GstCaps *caps, va_list var_args)
|
|
{
|
|
GstPadTemplate *new;
|
|
GstCaps *thecaps = NULL;
|
|
|
|
g_return_val_if_fail (name_template != NULL, NULL);
|
|
|
|
if (!name_is_valid (name_template, presence))
|
|
return NULL;
|
|
|
|
new = g_object_new (gst_pad_template_get_type (),
|
|
"name", name_template,
|
|
NULL);
|
|
|
|
GST_PAD_TEMPLATE_NAME_TEMPLATE (new) = g_strdup (name_template);
|
|
GST_PAD_TEMPLATE_DIRECTION (new) = direction;
|
|
GST_PAD_TEMPLATE_PRESENCE (new) = presence;
|
|
|
|
GST_FLAG_SET (GST_OBJECT (new), GST_PAD_TEMPLATE_FIXED);
|
|
while (caps) {
|
|
if (!GST_CAPS_IS_FIXED (caps)) {
|
|
GST_FLAG_UNSET (GST_OBJECT (new), GST_PAD_TEMPLATE_FIXED);
|
|
}
|
|
thecaps = gst_caps_append (thecaps, caps);
|
|
caps = va_arg (var_args, GstCaps*);
|
|
}
|
|
|
|
GST_PAD_TEMPLATE_CAPS (new) = thecaps;
|
|
gst_caps_ref (thecaps);
|
|
gst_caps_sink (thecaps);
|
|
|
|
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.
|
|
* @...: a NULL-terminated list of #GstCaps.
|
|
*
|
|
* Creates a new pad template with a name according to the given template
|
|
* and with the given arguments.
|
|
*
|
|
* Returns: a new #GstPadTemplate.
|
|
*/
|
|
GstPadTemplate*
|
|
gst_pad_template_new (const gchar *name_template,
|
|
GstPadDirection direction, GstPadPresence presence,
|
|
GstCaps *caps, ...)
|
|
{
|
|
GstPadTemplate *new;
|
|
va_list var_args;
|
|
|
|
va_start (var_args, caps);
|
|
|
|
new = gst_pad_template_newv (name_template, direction, presence,
|
|
caps, var_args);
|
|
|
|
va_end (var_args);
|
|
|
|
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. unref the caps
|
|
* after use.
|
|
*/
|
|
GstCaps*
|
|
gst_pad_template_get_caps (GstPadTemplate *templ)
|
|
{
|
|
g_return_val_if_fail (templ != NULL, NULL);
|
|
|
|
return gst_caps_ref (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 GstPad *ghost_pad_parent_class = NULL;
|
|
/* static guint gst_ghost_pad_signals[LAST_SIGNAL] = { 0 }; */
|
|
|
|
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);
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_init (GstGhostPad *pad)
|
|
{
|
|
/* zeroed by glib */
|
|
}
|
|
static void
|
|
gst_ghost_pad_dispose (GObject *object)
|
|
{
|
|
GstGhostPad *pad = GST_GHOST_PAD (object);
|
|
|
|
if (pad->realpad)
|
|
gst_pad_remove_ghost_pad((GstPad *) pad->realpad, (GstPad *) pad);
|
|
|
|
G_OBJECT_CLASS (ghost_pad_parent_class)->dispose (object);
|
|
}
|
|
|
|
/**
|
|
* 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 the given pad, and names it with
|
|
* the given name. If name is NULL, a guaranteed unique name (across all
|
|
* ghost pads) will be assigned (most likely of the form ghostpad%d).
|
|
*
|
|
* Returns: a new ghost #GstPad, or NULL in case of an error.
|
|
*/
|
|
|
|
GstPad*
|
|
gst_ghost_pad_new (const gchar *name,
|
|
GstPad *pad)
|
|
{
|
|
GstGhostPad *ghostpad;
|
|
GstRealPad *realpad;
|
|
|
|
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
|
|
|
|
ghostpad = g_object_new (gst_ghost_pad_get_type () ,NULL);
|
|
gst_pad_set_name (GST_PAD (ghostpad), name);
|
|
|
|
realpad = (GstRealPad *) pad;
|
|
|
|
while (!GST_IS_REAL_PAD (realpad)) {
|
|
realpad = GST_PAD_REALIZE (realpad);
|
|
}
|
|
GST_GPAD_REALPAD (ghostpad) = realpad;
|
|
gst_pad_set_pad_template (GST_PAD (ghostpad), GST_PAD_PAD_TEMPLATE (pad));
|
|
|
|
/* add ourselves to the real pad's list of ghostpads */
|
|
gst_pad_add_ghost_pad (pad, GST_PAD (ghostpad));
|
|
|
|
/* FIXME need to ref the real pad here... ? */
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PADS, "created ghost pad \"%s\"",
|
|
gst_pad_get_name (GST_PAD (ghostpad)));
|
|
|
|
return GST_PAD (ghostpad);
|
|
}
|
|
|
|
/**
|
|
* 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_CAST (rpad));
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_pad_event_default_dispatch (GstPad *pad, GstElement *element,
|
|
GstEvent *event)
|
|
{
|
|
GList *orig, *pads;
|
|
|
|
orig = pads = gst_pad_get_internal_links (pad);
|
|
|
|
while (pads) {
|
|
GstPad *eventpad = GST_PAD (pads->data);
|
|
pads = g_list_next (pads);
|
|
|
|
/* for all pads in the opposite direction that are 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_CAST (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 TRUE;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* 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, 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_event_discont_get_value (event, GST_FORMAT_TIME, &time)) {
|
|
if (gst_element_requires_clock (element) && element->clock) {
|
|
gst_clock_handle_discont (element->clock, time);
|
|
}
|
|
}
|
|
}
|
|
case GST_EVENT_FLUSH:
|
|
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 (data, 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_CAST (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, 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_CAST (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, FALSE);
|
|
g_return_val_if_fail (dest_value, 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, FALSE);
|
|
g_return_val_if_fail (dest_value, 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_CAST (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, FALSE);
|
|
g_return_val_if_fail (value, 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, FALSE);
|
|
g_return_val_if_fail (value, 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_CAST (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;
|
|
|
|
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), FALSE);
|
|
|
|
rpad = GST_PAD_REALIZE (pad);
|
|
|
|
if (GST_RPAD_FORMATSFUNC (rpad))
|
|
return GST_RPAD_FORMATSFUNC (rpad) (GST_PAD_CAST (pad));
|
|
|
|
return NULL;
|
|
}
|