mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Original commit message from CVS: * gst/playback/gststreamselector.c: (gst_stream_selector_dispose): Don't unref a NULL pad.
413 lines
12 KiB
C
413 lines
12 KiB
C
/* GStreamer
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* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
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* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
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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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/*
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* !!!!!!!!!!!!!!!!! Big phat warning. !!!!!!!!!!!!!!!!!!!!!!
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*
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* This is not a generic switch element. This is not to be used for
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* any such purpose. Patches to make it do that will be rejected.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "gststreamselector.h"
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GST_DEBUG_CATEGORY_STATIC (stream_selector_debug);
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#define GST_CAT_DEFAULT stream_selector_debug
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static const GstElementDetails gst_stream_selector_details =
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GST_ELEMENT_DETAILS ("StreamSelector",
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"Generic",
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"N-to-1 input stream_selectoring",
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"Julien Moutte <julien@moutte.net>\n"
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"Ronald S. Bultje <rbultje@ronald.bitfreak.net>\n"
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"Jan Schmidt <thaytan@mad.scientist.com>");
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static GstStaticPadTemplate gst_stream_selector_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink%d",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate gst_stream_selector_src_factory =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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enum
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{
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PROP_ACTIVE_PAD = 1
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};
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static void gst_stream_selector_dispose (GObject * object);
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static void gst_stream_selector_init (GstStreamSelector * sel);
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static void gst_stream_selector_base_init (GstStreamSelectorClass * klass);
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static void gst_stream_selector_class_init (GstStreamSelectorClass * klass);
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static GstCaps *gst_stream_selector_getcaps (GstPad * pad);
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static GList *gst_stream_selector_get_linked_pads (GstPad * pad);
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static GstPad *gst_stream_selector_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * unused);
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static GstFlowReturn gst_stream_selector_chain (GstPad * pad, GstBuffer * buf);
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static void gst_stream_selector_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_stream_selector_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_stream_selector_bufferalloc (GstPad * pad,
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guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
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static GstElementClass *parent_class = NULL;
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GType
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gst_stream_selector_get_type (void)
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{
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static GType stream_selector_type = 0;
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if (!stream_selector_type) {
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static const GTypeInfo stream_selector_info = {
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sizeof (GstStreamSelectorClass),
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(GBaseInitFunc) gst_stream_selector_base_init,
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NULL,
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(GClassInitFunc) gst_stream_selector_class_init,
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NULL,
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NULL,
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sizeof (GstStreamSelector),
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0,
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(GInstanceInitFunc) gst_stream_selector_init,
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};
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stream_selector_type =
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g_type_register_static (GST_TYPE_ELEMENT,
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"GstStreamSelector", &stream_selector_info, 0);
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GST_DEBUG_CATEGORY_INIT (stream_selector_debug,
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"streamselector", 0, "A stream-selector element");
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}
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return stream_selector_type;
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}
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static void
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gst_stream_selector_base_init (GstStreamSelectorClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_set_details (element_class, &gst_stream_selector_details);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_stream_selector_sink_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_stream_selector_src_factory));
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}
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static void
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gst_stream_selector_class_init (GstStreamSelectorClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property =
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GST_DEBUG_FUNCPTR (gst_stream_selector_set_property);
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gobject_class->get_property =
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GST_DEBUG_FUNCPTR (gst_stream_selector_get_property);
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g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
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g_param_spec_string ("active-pad", "Active pad", "Name of the currently"
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" active sink pad", NULL, G_PARAM_READWRITE));
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gobject_class->dispose = gst_stream_selector_dispose;
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gstelement_class->request_new_pad = gst_stream_selector_request_new_pad;
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}
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static void
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gst_stream_selector_init (GstStreamSelector * sel)
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{
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sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
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gst_pad_set_internal_link_function (sel->srcpad,
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GST_DEBUG_FUNCPTR (gst_stream_selector_get_linked_pads));
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gst_pad_set_getcaps_function (sel->srcpad,
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GST_DEBUG_FUNCPTR (gst_stream_selector_getcaps));
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gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
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/* sinkpad management */
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sel->active_sinkpad = NULL;
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sel->nb_sinkpads = 0;
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//GST_OBJECT_FLAG_SET (sel, GST_ELEMENT_WORK_IN_PLACE);
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}
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static void
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gst_stream_selector_dispose (GObject * object)
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{
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GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
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if (sel->active_sinkpad) {
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gst_object_unref (sel->active_sinkpad);
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sel->active_sinkpad = NULL;
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}
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_stream_selector_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
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switch (prop_id) {
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case PROP_ACTIVE_PAD:{
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const gchar *pad_name = g_value_get_string (value);
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GstPad *pad = NULL;
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GstPad **active_pad_p;
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if (strcmp (pad_name, "") != 0) {
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pad = gst_element_get_pad (GST_ELEMENT (object), pad_name);
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}
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GST_OBJECT_LOCK (object);
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if (pad == sel->active_sinkpad) {
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GST_OBJECT_UNLOCK (object);
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if (pad)
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gst_object_unref (pad);
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break;
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}
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#if 0
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if (sel->active_sinkpad && (GST_STATE (sel) >= GST_STATE_PAUSED)) {
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gst_pad_set_active (sel->active_sinkpad, FALSE);
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GST_DEBUG_OBJECT (sel, "Deactivating pad %" GST_PTR_FORMAT,
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sel->active_sinkpad);
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}
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#endif
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active_pad_p = &sel->active_sinkpad;
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gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
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if (pad)
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gst_object_unref (pad);
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#if 0
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if (sel->active_sinkpad && (GST_STATE (sel) >= GST_STATE_PAUSED)) {
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gst_pad_set_active (sel->active_sinkpad, TRUE);
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GST_DEBUG_OBJECT (sel, "Activating pad %" GST_PTR_FORMAT,
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sel->active_sinkpad);
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}
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#endif
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GST_DEBUG_OBJECT (sel, "New active pad is %" GST_PTR_FORMAT,
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sel->active_sinkpad);
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GST_OBJECT_UNLOCK (object);
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break;
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}
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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_stream_selector_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
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switch (prop_id) {
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case PROP_ACTIVE_PAD:{
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GST_OBJECT_LOCK (object);
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if (sel->active_sinkpad != NULL) {
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g_value_take_string (value, gst_pad_get_name (sel->active_sinkpad));
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} else {
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g_value_set_string (value, "");
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}
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GST_OBJECT_UNLOCK (object);
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break;
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}
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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 GstPad *
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gst_stream_selector_get_linked_pad (GstPad * pad, gboolean strict)
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{
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GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
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GstPad *otherpad = NULL;
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if (pad == sel->srcpad)
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otherpad = sel->active_sinkpad;
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else if (pad == sel->active_sinkpad || !strict)
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otherpad = sel->srcpad;
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gst_object_unref (sel);
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return otherpad;
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}
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static GstCaps *
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gst_stream_selector_getcaps (GstPad * pad)
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{
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GstPad *otherpad = gst_stream_selector_get_linked_pad (pad, FALSE);
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GstObject *parent;
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parent = gst_object_get_parent (GST_OBJECT (pad));
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if (!otherpad) {
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GST_DEBUG_OBJECT (parent,
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"Pad %s:%s not linked, returning ANY", GST_DEBUG_PAD_NAME (pad));
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gst_object_unref (parent);
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return gst_caps_new_any ();
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}
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GST_DEBUG_OBJECT (parent,
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"Pad %s:%s is linked (to %s:%s), returning allowed-caps",
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GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (otherpad));
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gst_object_unref (parent);
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return gst_pad_peer_get_caps (otherpad);
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}
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static GstFlowReturn
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gst_stream_selector_bufferalloc (GstPad * pad, guint64 offset,
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guint size, GstCaps * caps, GstBuffer ** buf)
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{
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GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
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GstFlowReturn result;
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GstPad *active_sinkpad;
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GST_OBJECT_LOCK (sel);
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active_sinkpad = sel->active_sinkpad;
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GST_OBJECT_UNLOCK (sel);
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/* Fallback allocation for buffers from pads except the selected one */
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if (pad != active_sinkpad) {
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GST_DEBUG_OBJECT (sel,
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"Pad %s:%s is not selected. Performing fallback allocation",
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GST_DEBUG_PAD_NAME (pad));
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*buf = NULL;
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result = GST_FLOW_OK;
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} else {
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result = gst_pad_alloc_buffer (sel->srcpad, offset, size, caps, buf);
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/* FIXME: HACK. If buffer alloc returns not-linked, perform a fallback
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* allocation. This should NOT be necessary, because playbin should
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* properly block the source pad from running until it's finished hooking
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* everything up, but playbin needs refactoring first. */
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if (result == GST_FLOW_NOT_LINKED) {
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GST_DEBUG_OBJECT (sel,
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"No peer pad yet - performing fallback allocation for pad %s:%s",
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GST_DEBUG_PAD_NAME (pad));
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*buf = NULL;
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result = GST_FLOW_OK;
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}
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}
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gst_object_unref (sel);
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return result;
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}
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static GList *
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gst_stream_selector_get_linked_pads (GstPad * pad)
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{
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GstPad *otherpad = gst_stream_selector_get_linked_pad (pad, TRUE);
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if (!otherpad)
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return NULL;
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return g_list_append (NULL, otherpad);
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}
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static GstPad *
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gst_stream_selector_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * unused)
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{
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GstStreamSelector *sel = GST_STREAM_SELECTOR (element);
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gchar *name = NULL;
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GstPad *sinkpad = NULL;
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g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
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GST_LOG_OBJECT (sel, "Creating new pad %d", sel->nb_sinkpads);
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GST_OBJECT_LOCK (sel);
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name = g_strdup_printf ("sink%d", sel->nb_sinkpads++);
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sinkpad = gst_pad_new_from_template (templ, name);
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g_free (name);
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if (sel->active_sinkpad == NULL)
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sel->active_sinkpad = gst_object_ref (sinkpad);
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GST_OBJECT_UNLOCK (sel);
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gst_pad_set_getcaps_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_stream_selector_getcaps));
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gst_pad_set_chain_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_stream_selector_chain));
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gst_pad_set_internal_link_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_stream_selector_get_linked_pads));
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gst_pad_set_bufferalloc_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_stream_selector_bufferalloc));
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gst_pad_set_active (sinkpad, TRUE);
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gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
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return sinkpad;
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}
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static GstFlowReturn
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gst_stream_selector_chain (GstPad * pad, GstBuffer * buf)
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{
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GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
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GstFlowReturn res;
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GstPad *active_sinkpad;
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GST_OBJECT_LOCK (sel);
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active_sinkpad = sel->active_sinkpad;
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GST_OBJECT_UNLOCK (sel);
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/* Ignore buffers from pads except the selected one */
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if (pad != active_sinkpad) {
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GST_DEBUG_OBJECT (sel, "Ignoring buffer %p from pad %s:%s",
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buf, GST_DEBUG_PAD_NAME (pad));
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gst_object_unref (sel);
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gst_buffer_unref (buf);
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return GST_FLOW_NOT_LINKED;
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}
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/* forward */
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GST_DEBUG_OBJECT (sel, "Forwarding buffer %p from pad %s:%s",
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buf, GST_DEBUG_PAD_NAME (pad));
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res = gst_pad_push (sel->srcpad, buf);
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gst_object_unref (sel);
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return res;
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}
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