gstreamer/ext/pulse/pulsemixer.c
2011-07-04 18:12:56 +02:00

234 lines
6.5 KiB
C

/*
* GStreamer pulseaudio plugin
*
* Copyright (c) 2004-2008 Lennart Poettering
*
* gst-pulse is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*
* gst-pulse 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with gst-pulse; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
/**
* SECTION:element-pulsemixer
* @see_also: pulsesrc, pulsesink
*
* This element lets you adjust sound input and output levels for the
* PulseAudio sound server. It supports the GstMixer interface, which can be
* used to obtain a list of available mixer tracks. Set the mixer element to
* READY state before using the GstMixer interface on it.
*
* <refsect2>
* <title>Example pipelines</title>
* <para>
* pulsemixer can't be used in a sensible way in gst-launch.
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <stdio.h>
#include "pulsemixer.h"
enum
{
PROP_SERVER = 1,
PROP_DEVICE,
PROP_DEVICE_NAME
};
GST_DEBUG_CATEGORY_EXTERN (pulse_debug);
#define GST_CAT_DEFAULT pulse_debug
static void gst_pulsemixer_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_pulsemixer_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_pulsemixer_finalize (GObject * object);
static GstStateChangeReturn gst_pulsemixer_change_state (GstElement * element,
GstStateChange transition);
GST_IMPLEMENT_PULSEMIXER_CTRL_METHODS (GstPulseMixer, gst_pulsemixer);
GST_IMPLEMENT_PULSEPROBE_METHODS (GstPulseMixer, gst_pulsemixer);
#define gst_pulsemixer_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstPulseMixer, gst_pulsemixer, GST_TYPE_ELEMENT,
G_IMPLEMENT_INTERFACE (GST_TYPE_MIXER, gst_pulsemixer_mixer_interface_init);
G_IMPLEMENT_INTERFACE (GST_TYPE_PROPERTY_PROBE,
gst_pulsemixer_property_probe_interface_init));
static void
gst_pulsemixer_class_init (GstPulseMixerClass * g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_pulsemixer_change_state);
gobject_class->finalize = gst_pulsemixer_finalize;
gobject_class->get_property = gst_pulsemixer_get_property;
gobject_class->set_property = gst_pulsemixer_set_property;
g_object_class_install_property (gobject_class,
PROP_SERVER,
g_param_spec_string ("server", "Server",
"The PulseAudio server to connect to", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_DEVICE,
g_param_spec_string ("device", "Device",
"The PulseAudio sink or source to control", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_DEVICE_NAME,
g_param_spec_string ("device-name", "Device name",
"Human-readable name of the sound device", NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_details_simple (GST_ELEMENT_CLASS (g_class),
"PulseAudio Mixer",
"Generic/Audio",
"Control sound input and output levels for PulseAudio",
"Lennart Poettering");
}
static void
gst_pulsemixer_init (GstPulseMixer * this)
{
this->mixer = NULL;
this->server = NULL;
this->device = NULL;
this->probe =
gst_pulseprobe_new (G_OBJECT (this), G_OBJECT_GET_CLASS (this),
PROP_DEVICE, this->device, TRUE, TRUE);
}
static void
gst_pulsemixer_finalize (GObject * object)
{
GstPulseMixer *this = GST_PULSEMIXER (object);
g_free (this->server);
g_free (this->device);
if (this->mixer) {
gst_pulsemixer_ctrl_free (this->mixer);
this->mixer = NULL;
}
if (this->probe) {
gst_pulseprobe_free (this->probe);
this->probe = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_pulsemixer_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstPulseMixer *this = GST_PULSEMIXER (object);
switch (prop_id) {
case PROP_SERVER:
g_free (this->server);
this->server = g_value_dup_string (value);
if (this->probe)
gst_pulseprobe_set_server (this->probe, this->server);
break;
case PROP_DEVICE:
g_free (this->device);
this->device = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_pulsemixer_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstPulseMixer *this = GST_PULSEMIXER (object);
switch (prop_id) {
case PROP_SERVER:
g_value_set_string (value, this->server);
break;
case PROP_DEVICE:
g_value_set_string (value, this->device);
break;
case PROP_DEVICE_NAME:
if (this->mixer) {
char *t = g_strdup_printf ("%s: %s",
this->mixer->type == GST_PULSEMIXER_SINK ? "Playback" : "Capture",
this->mixer->description);
g_value_take_string (value, t);
} else
g_value_set_string (value, NULL);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_pulsemixer_change_state (GstElement * element, GstStateChange transition)
{
GstPulseMixer *this = GST_PULSEMIXER (element);
GstStateChangeReturn res;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!this->mixer)
this->mixer =
gst_pulsemixer_ctrl_new (G_OBJECT (this), this->server,
this->device, GST_PULSEMIXER_UNKNOWN);
break;
default:
;
}
res = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
if (this->mixer) {
gst_pulsemixer_ctrl_free (this->mixer);
this->mixer = NULL;
}
break;
default:
;
}
return res;
}