/* * 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); static void gst_pulsemixer_init_interfaces (GType type); GST_IMPLEMENT_PULSEMIXER_CTRL_METHODS (GstPulseMixer, gst_pulsemixer); GST_IMPLEMENT_PULSEPROBE_METHODS (GstPulseMixer, gst_pulsemixer); GST_BOILERPLATE_FULL (GstPulseMixer, gst_pulsemixer, GstElement, GST_TYPE_ELEMENT, gst_pulsemixer_init_interfaces); static gboolean gst_pulsemixer_interface_supported (GstImplementsInterface * iface, GType interface_type) { GstPulseMixer *this = GST_PULSEMIXER (iface); if (interface_type == GST_TYPE_MIXER && this->mixer) return TRUE; if (interface_type == GST_TYPE_PROPERTY_PROBE && this->probe) return TRUE; return FALSE; } static void gst_pulsemixer_implements_interface_init (GstImplementsInterfaceClass * klass) { klass->supported = gst_pulsemixer_interface_supported; } static void gst_pulsemixer_init_interfaces (GType type) { static const GInterfaceInfo implements_iface_info = { (GInterfaceInitFunc) gst_pulsemixer_implements_interface_init, NULL, NULL, }; static const GInterfaceInfo mixer_iface_info = { (GInterfaceInitFunc) gst_pulsemixer_mixer_interface_init, NULL, NULL, }; static const GInterfaceInfo probe_iface_info = { (GInterfaceInitFunc) gst_pulsemixer_property_probe_interface_init, NULL, NULL, }; g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE, &implements_iface_info); g_type_add_interface_static (type, GST_TYPE_MIXER, &mixer_iface_info); g_type_add_interface_static (type, GST_TYPE_PROPERTY_PROBE, &probe_iface_info); } static void gst_pulsemixer_base_init (gpointer g_class) { 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_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_DEBUG_FUNCPTR (gst_pulsemixer_finalize); gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_pulsemixer_get_property); gobject_class->set_property = GST_DEBUG_FUNCPTR (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)); } static void gst_pulsemixer_init (GstPulseMixer * this, GstPulseMixerClass * g_class) { 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; }