| /* GStreamer OSS4 mixer on/off switch control |
| * Copyright (C) 2007-2008 Tim-Philipp Müller <tim centricular 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. |
| */ |
| |
| /* A simple ON/OFF 'switch' in gnome-volume-control / GstMixer is represented |
| * by a GstMixerTrack with no channels. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <gst/gst-i18n-plugin.h> |
| |
| #define NO_LEGACY_MIXER |
| #include "oss4-mixer-switch.h" |
| #include "oss4-soundcard.h" |
| |
| GST_DEBUG_CATEGORY_EXTERN (oss4mixer_debug); |
| #define GST_CAT_DEFAULT oss4mixer_debug |
| |
| /* GstMixerTrack is a plain GObject, so let's just use the GLib macro here */ |
| G_DEFINE_TYPE (GstOss4MixerSwitch, gst_oss4_mixer_switch, GST_TYPE_MIXER_TRACK); |
| |
| static void |
| gst_oss4_mixer_switch_class_init (GstOss4MixerSwitchClass * klass) |
| { |
| /* nothing to do here */ |
| } |
| |
| static void |
| gst_oss4_mixer_switch_init (GstOss4MixerSwitch * s) |
| { |
| /* nothing to do here */ |
| } |
| |
| gboolean |
| gst_oss4_mixer_switch_set (GstOss4MixerSwitch * s, gboolean disabled) |
| { |
| GstMixerTrack *track; |
| int newval; |
| |
| track = GST_MIXER_TRACK (s); |
| |
| newval = disabled ? GST_MIXER_TRACK_MUTE : 0; |
| |
| if (newval == (track->flags & GST_MIXER_TRACK_MUTE)) { |
| GST_LOG_OBJECT (s, "switch is already %d, doing nothing", newval); |
| return TRUE; |
| } |
| |
| if (!gst_oss4_mixer_set_control_val (s->mixer, s->mc, !disabled)) { |
| GST_WARNING_OBJECT (s, "could not set switch to %d", !disabled); |
| return FALSE; |
| } |
| |
| if (disabled) { |
| track->flags |= GST_MIXER_TRACK_MUTE; |
| } else { |
| track->flags &= ~GST_MIXER_TRACK_MUTE; |
| } |
| |
| GST_LOG_OBJECT (s, "set switch to %d", newval); |
| |
| return TRUE; |
| } |
| |
| gboolean |
| gst_oss4_mixer_switch_get (GstOss4MixerSwitch * s, gboolean * disabled) |
| { |
| GstMixerTrack *track; |
| int enabled = -1; |
| |
| track = GST_MIXER_TRACK (s); |
| |
| if (!gst_oss4_mixer_get_control_val (s->mixer, s->mc, &enabled) |
| || (enabled < 0)) { |
| GST_WARNING_OBJECT (s, "could not get switch state"); |
| return FALSE; |
| } |
| |
| if (enabled) { |
| track->flags &= ~GST_MIXER_TRACK_MUTE; |
| } else { |
| track->flags |= GST_MIXER_TRACK_MUTE; |
| } |
| *disabled = (enabled == 0); |
| |
| return TRUE; |
| } |
| |
| GstMixerTrack * |
| gst_oss4_mixer_switch_new (GstOss4Mixer * mixer, GstOss4MixerControl * mc) |
| { |
| GstOss4MixerSwitch *s; |
| GstMixerTrack *track; |
| int cur = -1; |
| |
| s = g_object_new (GST_TYPE_OSS4_MIXER_SWITCH, "untranslated-label", |
| mc->mixext.extname, NULL); |
| |
| s->mixer = mixer; |
| s->mc = mc; |
| |
| track = GST_MIXER_TRACK (s); |
| |
| /* caller will set track->label and track->flags */ |
| |
| track->num_channels = 0; |
| track->min_volume = 0; |
| track->max_volume = 0; |
| |
| if (!gst_oss4_mixer_get_control_val (s->mixer, s->mc, &cur) || cur < 0) |
| return NULL; |
| |
| if (cur) { |
| track->flags &= ~GST_MIXER_TRACK_MUTE; |
| } else { |
| track->flags |= GST_MIXER_TRACK_MUTE; |
| } |
| |
| return track; |
| } |
| |
| /* This is called from the watch thread */ |
| void |
| gst_oss4_mixer_switch_process_change_unlocked (GstMixerTrack * track) |
| { |
| GstOss4MixerSwitch *s = GST_OSS4_MIXER_SWITCH_CAST (track); |
| |
| if (!s->mc->changed) |
| return; |
| |
| gst_mixer_mute_toggled (GST_MIXER (s->mixer), track, !s->mc->last_val); |
| } |