mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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534e0c268e
Original commit message from CVS: * ext/alsa/Makefile.am: * ext/alsa/gstalsadeviceprobe.c: * ext/alsa/gstalsadeviceprobe.h: Helper functions to add device probing via the GstPropertyProbe interface to a class. * ext/alsa/gstalsamixer.h: Comment out GST_ALSA_MIXER, it returns a struct that's not used. * ext/alsa/gstalsamixer.c: (gst_alsa_mixer_open): Add some debug info. * ext/alsa/gstalsamixerelement.c: (gst_alsa_mixer_element_interface_supported), (gst_implements_interface_init), (gst_alsa_mixer_element_init_interfaces), (gst_alsa_mixer_element_class_init), (gst_alsa_mixer_element_finalize), (gst_alsa_mixer_element_init), (gst_alsa_mixer_element_set_property), (gst_alsa_mixer_element_get_property), (gst_alsa_mixer_element_change_state): * ext/alsa/gstalsamixerelement.h: Add 'device' and 'device-name' properties. Add GstPropertyProbe for device handling (gnome-volume-control will need that).
235 lines
6.7 KiB
C
235 lines
6.7 KiB
C
/* ALSA mixer implementation.
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* Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstalsamixerelement.h"
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#include "gstalsadeviceprobe.h"
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enum
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{
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PROP_DEVICE = 1,
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PROP_DEVICE_NAME
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};
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static GstElementDetails gst_alsa_mixer_element_details =
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GST_ELEMENT_DETAILS ("Alsa Mixer",
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"Generic/Audio",
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"Control sound input and output levels with ALSA",
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"Leif Johnson <leif@ambient.2y.net>");
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static void gst_alsa_mixer_element_init_interfaces (GType type);
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GST_BOILERPLATE_FULL (GstAlsaMixerElement, gst_alsa_mixer_element,
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GstElement, GST_TYPE_ELEMENT, gst_alsa_mixer_element_init_interfaces)
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/* massive macro that takes care of all the GstMixer stuff */
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GST_IMPLEMENT_ALSA_MIXER_METHODS (GstAlsaMixerElement, gst_alsa_mixer_element);
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static void gst_alsa_mixer_element_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static void gst_alsa_mixer_element_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_alsa_mixer_element_finalize (GObject * object);
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static GstStateChangeReturn gst_alsa_mixer_element_change_state (GstElement
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* element, GstStateChange transition);
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static gboolean
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gst_alsa_mixer_element_interface_supported (GstAlsaMixerElement * this,
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GType interface_type)
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{
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if (interface_type == GST_TYPE_MIXER) {
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return gst_alsa_mixer_element_supported (this, interface_type);
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}
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g_return_val_if_reached (FALSE);
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}
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static void
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gst_implements_interface_init (GstImplementsInterfaceClass * klass)
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{
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klass->supported = (gpointer) gst_alsa_mixer_element_interface_supported;
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}
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static void
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gst_alsa_mixer_element_init_interfaces (GType type)
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{
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static const GInterfaceInfo implements_iface_info = {
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(GInterfaceInitFunc) gst_implements_interface_init,
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NULL,
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NULL,
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};
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static const GInterfaceInfo mixer_iface_info = {
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(GInterfaceInitFunc) gst_alsa_mixer_element_interface_init,
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NULL,
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NULL,
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};
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g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE,
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&implements_iface_info);
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g_type_add_interface_static (type, GST_TYPE_MIXER, &mixer_iface_info);
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gst_alsa_type_add_device_property_probe_interface (type,
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G_STRUCT_OFFSET (GstAlsaMixerElementClass, device_probe_data),
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PROP_DEVICE);
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}
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static void
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gst_alsa_mixer_element_base_init (gpointer klass)
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{
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gst_element_class_set_details (GST_ELEMENT_CLASS (klass),
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&gst_alsa_mixer_element_details);
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}
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static void
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gst_alsa_mixer_element_class_init (GstAlsaMixerElementClass * klass)
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{
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GstElementClass *element_class;
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GObjectClass *gobject_class;
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element_class = (GstElementClass *) klass;
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gobject_class = (GObjectClass *) klass;
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gobject_class->finalize = gst_alsa_mixer_element_finalize;
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gobject_class->get_property = gst_alsa_mixer_element_get_property;
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gobject_class->set_property = gst_alsa_mixer_element_set_property;
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g_object_class_install_property (gobject_class, PROP_DEVICE,
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g_param_spec_string ("device", "Device",
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"ALSA device, as defined in an asound configuration file",
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"default", G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
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g_param_spec_string ("device-name", "Device name",
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"Human-readable name of the sound device", "", G_PARAM_READABLE));
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element_class->change_state =
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GST_DEBUG_FUNCPTR (gst_alsa_mixer_element_change_state);
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}
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static void
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gst_alsa_mixer_element_finalize (GObject * obj)
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{
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GstAlsaMixerElement *this = GST_ALSA_MIXER_ELEMENT (obj);
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g_free (this->device);
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G_OBJECT_CLASS (parent_class)->finalize (obj);
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}
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static void
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gst_alsa_mixer_element_init (GstAlsaMixerElement * this,
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GstAlsaMixerElementClass * klass)
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{
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this->mixer = NULL;
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this->device = g_strdup ("default");
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}
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static void
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gst_alsa_mixer_element_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstAlsaMixerElement *this = GST_ALSA_MIXER_ELEMENT (object);
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switch (prop_id) {
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case PROP_DEVICE:{
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GST_OBJECT_LOCK (this);
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g_free (this->device);
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this->device = g_value_dup_string (value);
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GST_OBJECT_UNLOCK (this);
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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_alsa_mixer_element_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstAlsaMixerElement *this = GST_ALSA_MIXER_ELEMENT (object);
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switch (prop_id) {
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case PROP_DEVICE:{
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GST_OBJECT_LOCK (this);
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g_value_set_string (value, this->device);
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GST_OBJECT_UNLOCK (this);
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break;
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}
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case PROP_DEVICE_NAME:{
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GST_OBJECT_LOCK (this);
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if (this->mixer) {
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g_value_set_string (value, this->mixer->cardname);
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} else {
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g_value_set_string (value, NULL);
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}
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GST_OBJECT_UNLOCK (this);
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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 GstStateChangeReturn
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gst_alsa_mixer_element_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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GstAlsaMixerElement *this = GST_ALSA_MIXER_ELEMENT (element);
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (!this->mixer) {
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if (!this->device) {
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this->mixer = gst_alsa_mixer_new ("default", GST_ALSA_MIXER_ALL);
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} else {
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this->mixer = gst_alsa_mixer_new (this->device, GST_ALSA_MIXER_ALL);
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}
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}
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_NULL:
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if (this->mixer) {
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gst_alsa_mixer_free (this->mixer);
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this->mixer = NULL;
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}
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break;
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default:
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break;
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}
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return ret;
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}
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