gstreamer/gst/playback/gststreamselector.c
Jan Schmidt 1874a9fc84 gst/playback/gststreamselector.c: 3rd time's the charm. Correct ref-counting for discarded buffers.
Original commit message from CVS:
* gst/playback/gststreamselector.c: (gst_stream_selector_chain):
3rd time's the charm. Correct ref-counting for discarded buffers.
2005-11-29 16:54:50 +00:00

353 lines
10 KiB
C

/* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* !!!!!!!!!!!!!!!!! Big phat warning. !!!!!!!!!!!!!!!!!!!!!!
*
* The pads on the sinkside can be filled and the application is
* supposed to enable/disable them. The plugin will receive input
* data over the currently active pad and take care of data
* forwarding and negotiation. This plugin does nothing fancy. It
* exists to be light-weight and simple.
*
* This is not a generic switch element. This is not to be used for
* any such purpose. Patches to make it do that will be rejected.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gststreamselector.h"
GST_DEBUG_CATEGORY_STATIC (stream_selector_debug);
#define GST_CAT_DEFAULT stream_selector_debug
static GstStaticPadTemplate gst_stream_selector_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gst_stream_selector_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
enum
{
PROP_ACTIVE_PAD = 1
};
static void gst_stream_selector_dispose (GObject * object);
static void gst_stream_selector_init (GstStreamSelector * sel);
static void gst_stream_selector_base_init (GstStreamSelectorClass * klass);
static void gst_stream_selector_class_init (GstStreamSelectorClass * klass);
static GstCaps *gst_stream_selector_getcaps (GstPad * pad);
static GList *gst_stream_selector_get_linked_pads (GstPad * pad);
static GstPad *gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused);
static GstFlowReturn gst_stream_selector_chain (GstPad * pad, GstBuffer * buf);
static void gst_stream_selector_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_stream_selector_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementClass *parent_class = NULL;
GType
gst_stream_selector_get_type (void)
{
static GType stream_selector_type = 0;
if (!stream_selector_type) {
static const GTypeInfo stream_selector_info = {
sizeof (GstStreamSelectorClass),
(GBaseInitFunc) gst_stream_selector_base_init,
NULL,
(GClassInitFunc) gst_stream_selector_class_init,
NULL,
NULL,
sizeof (GstStreamSelector),
0,
(GInstanceInitFunc) gst_stream_selector_init,
};
stream_selector_type =
g_type_register_static (GST_TYPE_ELEMENT,
"GstStreamSelector", &stream_selector_info, 0);
GST_DEBUG_CATEGORY_INIT (stream_selector_debug,
"streamselector", 0, "A stream-selector element");
}
return stream_selector_type;
}
static void
gst_stream_selector_base_init (GstStreamSelectorClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
static GstElementDetails gst_stream_selector_details =
GST_ELEMENT_DETAILS ("StreamSelector",
"Generic",
"N-to-1 input stream_selectoring",
"Julien Moutte <julien@moutte.net>\n"
"Ronald S. Bultje <rbultje@ronald.bitfreak.net>");
gst_element_class_set_details (element_class, &gst_stream_selector_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_stream_selector_sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_stream_selector_src_factory));
}
static void
gst_stream_selector_class_init (GstStreamSelectorClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_stream_selector_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_stream_selector_get_property);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ACTIVE_PAD,
g_param_spec_string ("active-pad", "Active pad", "Name of the currently"
" active sink pad", NULL, G_PARAM_READWRITE));
gobject_class->dispose = gst_stream_selector_dispose;
gstelement_class->request_new_pad = gst_stream_selector_request_new_pad;
}
static void
gst_stream_selector_init (GstStreamSelector * sel)
{
sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_internal_link_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_linked_pads));
gst_pad_set_getcaps_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_getcaps));
gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
/* sinkpad management */
sel->active_sinkpad = NULL;
sel->nb_sinkpads = 0;
//GST_OBJECT_FLAG_SET (sel, GST_ELEMENT_WORK_IN_PLACE);
}
static void
gst_stream_selector_dispose (GObject * object)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
gst_object_unref (sel->active_sinkpad);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_stream_selector_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
switch (prop_id) {
case PROP_ACTIVE_PAD:{
const gchar *pad_name = g_value_get_string (value);
GstPad *pad;
GST_OBJECT_LOCK (object);
pad = gst_element_get_pad (GST_ELEMENT (object), pad_name);
if (pad == sel->active_sinkpad) {
GST_OBJECT_UNLOCK (object);
gst_object_unref (pad);
break;
}
if (sel->active_sinkpad && (GST_STATE (sel) >= GST_STATE_PAUSED)) {
gst_pad_set_active (sel->active_sinkpad, FALSE);
}
gst_object_replace ((GstObject **) (&sel->active_sinkpad),
GST_OBJECT (pad));
gst_object_unref (pad);
if (sel->active_sinkpad && (GST_STATE (sel) >= GST_STATE_PAUSED)) {
gst_pad_set_active (sel->active_sinkpad, TRUE);
}
GST_OBJECT_UNLOCK (object);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_stream_selector_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
switch (prop_id) {
case PROP_ACTIVE_PAD:{
GST_OBJECT_LOCK (object);
if (sel->active_sinkpad != NULL) {
g_value_set_string (value, gst_pad_get_name (sel->active_sinkpad));
} else
g_value_set_string (value, "");
GST_OBJECT_UNLOCK (object);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstPad *
gst_stream_selector_get_linked_pad (GstPad * pad, gboolean strict)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
GstPad *otherpad = NULL;
if (pad == sel->srcpad)
otherpad = sel->active_sinkpad;
else if (pad == sel->active_sinkpad || !strict)
otherpad = sel->srcpad;
gst_object_unref (sel);
return otherpad;
}
static GstCaps *
gst_stream_selector_getcaps (GstPad * pad)
{
GstPad *otherpad = gst_stream_selector_get_linked_pad (pad, FALSE);
GstObject *parent;
parent = gst_object_get_parent (GST_OBJECT (pad));
if (!otherpad) {
GST_DEBUG_OBJECT (parent,
"Pad %s:%s not linked, returning ANY", GST_DEBUG_PAD_NAME (pad));
gst_object_unref (parent);
return gst_caps_new_any ();
}
GST_DEBUG_OBJECT (parent,
"Pad %s:%s is linked (to %s:%s), returning allowed-caps",
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (otherpad));
gst_object_unref (parent);
return gst_pad_peer_get_caps (otherpad);
}
static GList *
gst_stream_selector_get_linked_pads (GstPad * pad)
{
GstPad *otherpad = gst_stream_selector_get_linked_pad (pad, TRUE);
if (!otherpad)
return NULL;
return g_list_append (NULL, otherpad);
}
static GstPad *
gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (element);
gchar *name = NULL;
GstPad *sinkpad = NULL;
g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
GST_LOG_OBJECT (sel, "Creating new pad %d", sel->nb_sinkpads);
name = g_strdup_printf ("sink%d", sel->nb_sinkpads++);
sinkpad = gst_pad_new_from_template (templ, name);
g_free (name);
GST_OBJECT_LOCK (sel);
if (sel->active_sinkpad == NULL)
sel->active_sinkpad = gst_object_ref (sinkpad);
GST_OBJECT_UNLOCK (sel);
gst_pad_set_getcaps_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_getcaps));
gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_chain));
gst_pad_set_internal_link_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_linked_pads));
gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
GST_OBJECT_LOCK (sel);
if (GST_STATE (sel) >= GST_STATE_PAUSED) {
gst_pad_set_active (sinkpad, TRUE);
}
GST_OBJECT_UNLOCK (sel);
return sinkpad;
}
static GstFlowReturn
gst_stream_selector_chain (GstPad * pad, GstBuffer * buf)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
GstFlowReturn res;
GstPad *active_sinkpad;
GST_OBJECT_LOCK (sel);
active_sinkpad = sel->active_sinkpad;
GST_OBJECT_UNLOCK (sel);
/* Ignore buffers from pads except the selected one */
if (pad != active_sinkpad) {
GST_DEBUG_OBJECT (sel, "Ignoring buffer %p from pad %s:%s",
buf, GST_DEBUG_PAD_NAME (pad));
gst_object_unref (sel);
gst_buffer_unref (buf);
return GST_FLOW_NOT_LINKED;
}
/* forward */
GST_DEBUG_OBJECT (sel, "Forwarding buffer %p from pad %s:%s",
buf, GST_DEBUG_PAD_NAME (pad));
res = gst_pad_push (sel->srcpad, buf);
gst_object_unref (sel);
return res;
}