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Adding a new plugin: switch.

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Original commit message from CVS:
Adding a new plugin: switch.

It takes N input and only has 1 output. You can "switch" the forwarded input through properties ("nb_sources", "active_source") and i will probably add tuner interface support soon.

It should be able to handle any kind of data passing through it.

It is still a work in progress don't consider it usable for production yet.
This commit is contained in:
Julien Moutte 2003-12-08 20:01:01 +00:00
parent eb652be7e1
commit 537891db41
4 changed files with 414 additions and 0 deletions
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2
configure.ac
View file

@ -334,6 +334,7 @@ GST_PLUGINS_ALL="\
spectrum \
speed \
stereo \
switch \
synaesthesia \
tags \
tcp \
@ -1395,6 +1396,7 @@ gst/smpte/Makefile
gst/spectrum/Makefile
gst/speed/Makefile
gst/stereo/Makefile
gst/switch/Makefile
gst/synaesthesia/Makefile
gst/tags/Makefile
gst/tcp/Makefile

9
gst/switch/Makefile.am Normal file
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@ -0,0 +1,9 @@
plugin_LTLIBRARIES = libgstswitch.la
libgstswitch_la_SOURCES = gstswitch.c
libgstswitch_la_CFLAGS = $(GST_CFLAGS)
libgstswitch_la_LIBADD =
libgstswitch_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = gstswitch.h

336
gst/switch/gstswitch.c Normal file
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@ -0,0 +1,336 @@
/* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* Object header */
#include "gstswitch.h"
enum {
ARG_0,
ARG_NB_SOURCES,
ARG_ACTIVE_SOURCE
};
/* ElementFactory information */
static GstElementDetails gst_switch_details = GST_ELEMENT_DETAILS (
"Switch",
"Generic",
"N-to-1 input switching",
"Julien Moutte <julien@moutte.net>"
);
GST_PAD_TEMPLATE_FACTORY (gst_switch_sink_factory,
"sink%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_CAPS_ANY
);
static GstElementClass *parent_class = NULL;
/* ============================================================= */
/* */
/* Private Methods */
/* */
/* ============================================================= */
static GstPad*
gst_switch_request_new_pad (GstElement *element,
GstPadTemplate *templ,
const gchar *unused)
{
char *name = NULL;
GstPad *sinkpad = NULL;
GstSwitch *gstswitch = NULL;
GstSwitchPad *switchpad = NULL;
g_return_val_if_fail (GST_IS_SWITCH (element), NULL);
if (templ->direction != GST_PAD_SINK) {
g_warning ("gstswitch: requested a non sink pad\n");
return NULL;
}
gstswitch = GST_SWITCH (element);
name = g_strdup_printf ("sink%d", gstswitch->nb_sinkpads);
sinkpad = gst_pad_new_from_template (templ, name);
if (name)
g_free (name);
gst_element_add_pad (GST_ELEMENT (gstswitch), sinkpad);
switchpad = g_new0 (GstSwitchPad, 1);
if (!switchpad)
return NULL;
switchpad->sinkpad = sinkpad;
switchpad->data = NULL;
switchpad->forwarded = FALSE;
gstswitch->sinkpads = g_list_insert (gstswitch->sinkpads, switchpad,
gstswitch->nb_sinkpads);
gstswitch->nb_sinkpads++;
return sinkpad;
}
static gboolean
gst_switch_poll_sinkpads (GstSwitch *gstswitch)
{
GList *pads;
g_return_val_if_fail (gstswitch != NULL, FALSE);
g_return_val_if_fail (GST_IS_SWITCH (gstswitch), FALSE);
pads = gstswitch->sinkpads;
while (pads) {
GstSwitchPad *switchpad = pads->data;
GstData *data = gst_pad_pull (switchpad->sinkpad);
if (GST_IS_EVENT (data) &&
(GST_EVENT_TYPE (GST_EVENT (data)) == GST_EVENT_EOS)) {
/* If that data was not forwarded we unref it */
if (!switchpad->forwarded && switchpad->data) {
gst_data_unref (switchpad->data);
switchpad->data = NULL;
}
gst_event_unref (GST_EVENT (data));
}
else {
/* If that data was not forwarded we unref it */
if (!switchpad->forwarded && switchpad->data) {
gst_data_unref (switchpad->data);
switchpad->data = NULL;
}
switchpad->data = data;
switchpad->forwarded = FALSE;
}
pads = g_list_next (pads);
}
return TRUE;
}
static void
gst_switch_loop (GstElement *element)
{
GstSwitch *gstswitch = NULL;
GstSwitchPad *switchpad = NULL;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_SWITCH (element));
gstswitch = GST_SWITCH (element);
/* We poll all our sinkpads */
gst_switch_poll_sinkpads (gstswitch);
/* We get the active sinkpad */
switchpad = g_list_nth_data (gstswitch->sinkpads, gstswitch->active_sinkpad);
if (switchpad) {
/* Pushing active sinkpad data to srcpad */
gst_pad_push (gstswitch->srcpad, switchpad->data);
/* Mark this data as forwarded so that it won't get unrefed on next poll */
switchpad->forwarded = TRUE;
}
}
/* =========================================== */
/* */
/* Properties */
/* */
/* =========================================== */
static void
gst_switch_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GstSwitch *gstswitch = NULL;
g_return_if_fail (GST_IS_SWITCH (object));
gstswitch = GST_SWITCH (object);
switch (prop_id) {
case ARG_ACTIVE_SOURCE:
gstswitch->active_sinkpad = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_switch_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
GstSwitch *gstswitch = NULL;
g_return_if_fail (GST_IS_SWITCH (object));
gstswitch = GST_SWITCH (object);
switch (prop_id) {
case ARG_ACTIVE_SOURCE:
g_value_set_int (value, gstswitch->active_sinkpad);
break;
case ARG_NB_SOURCES:
g_value_set_int (value, gstswitch->nb_sinkpads);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* =========================================== */
/* */
/* Init & Class init */
/* */
/* =========================================== */
static void
gst_switch_dispose (GObject *object)
{
GstSwitch *gstswitch = NULL;
gstswitch = GST_SWITCH (object);
if (gstswitch->sinkpads) {
g_list_free (gstswitch->sinkpads);
gstswitch->sinkpads = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_switch_init (GstSwitch *gstswitch)
{
gstswitch->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (gstswitch), gstswitch->srcpad);
gst_element_set_loop_function (GST_ELEMENT (gstswitch), gst_switch_loop);
gstswitch->sinkpads = NULL;
gstswitch->active_sinkpad = 0;
gstswitch->nb_sinkpads = 0;
}
static void
gst_switch_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_switch_details);
gst_element_class_add_pad_template (element_class,
GST_PAD_TEMPLATE_GET (gst_switch_sink_factory));
}
static void
gst_switch_class_init (GstSwitchClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (gobject_class,
ARG_NB_SOURCES,
g_param_spec_int ("nb_sources",
"number of sources",
"number of sources",
G_MININT, G_MAXINT, 0,
G_PARAM_READABLE));
g_object_class_install_property (gobject_class,
ARG_ACTIVE_SOURCE,
g_param_spec_int ("active_source",
"active source",
"active source",
G_MININT, G_MAXINT, 0,
G_PARAM_READWRITE));
gobject_class->dispose = gst_switch_dispose;
gobject_class->set_property = gst_switch_set_property;
gobject_class->get_property = gst_switch_get_property;
gstelement_class->request_new_pad = gst_switch_request_new_pad;
}
/* ============================================================= */
/* */
/* Public Methods */
/* */
/* ============================================================= */
GType
gst_switch_get_type (void)
{
static GType switch_type = 0;
if (!switch_type) {
static const GTypeInfo switch_info = {
sizeof(GstSwitchClass),
gst_switch_base_init,
NULL,
(GClassInitFunc) gst_switch_class_init,
NULL,
NULL,
sizeof(GstSwitch),
0,
(GInstanceInitFunc) gst_switch_init,
};
switch_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstSwitch", &switch_info, 0);
}
return switch_type;
}
static gboolean
plugin_init (GstPlugin *plugin)
{
return gst_element_register (plugin, "switch", GST_RANK_NONE,
GST_TYPE_SWITCH);
}
GST_PLUGIN_DEFINE (
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"switch",
"N-to-1 input switching",
plugin_init,
VERSION,
GST_LICENSE,
GST_PACKAGE,
GST_ORIGIN
)

67
gst/switch/gstswitch.h Normal file
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@ -0,0 +1,67 @@
/* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.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.
*/
#ifndef __GST_SWITCH_H__
#define __GST_SWITCH_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_SWITCH \
(gst_switch_get_type())
#define GST_SWITCH(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_SWITCH, GstSwitch))
#define GST_SWITCH_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SWITCH, GstSwitch))
#define GST_IS_SWITCH(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_SWITCH))
#define GST_IS_SWITCH_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SWITCH))
typedef struct _GstSwitchPad GstSwitchPad;
typedef struct _GstSwitch GstSwitch;
typedef struct _GstSwitchClass GstSwitchClass;
struct _GstSwitchPad {
GstPad *sinkpad;
GstData *data;
gboolean forwarded;
};
struct _GstSwitch {
GstElement element;
GList *sinkpads;
GstPad *srcpad;
guint nb_sinkpads;
guint active_sinkpad;
};
struct _GstSwitchClass {
GstElementClass parent_class;
};
GType gst_switch_get_type (void);
G_END_DECLS
#endif /* __GST_SWITCH_H__ */