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75886ba63d
GCC 4.6.x complains about such variable usage. Unused but set variables were removed except that gst_oss4_mixer_slider_set_mute () now returns the value from the call to gst_oss4_mixer_set_control_val ().
150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/* GStreamer OSS4 mixer on/off switch control
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* Copyright (C) 2007-2008 Tim-Philipp Müller <tim centricular 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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/* A simple ON/OFF 'switch' in gnome-volume-control / GstMixer is represented
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* by a GstMixerTrack with no channels.
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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 <gst/gst-i18n-plugin.h>
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#define NO_LEGACY_MIXER
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#include "oss4-mixer-switch.h"
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#include "oss4-soundcard.h"
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GST_DEBUG_CATEGORY_EXTERN (oss4mixer_debug);
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#define GST_CAT_DEFAULT oss4mixer_debug
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/* GstMixerTrack is a plain GObject, so let's just use the GLib macro here */
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G_DEFINE_TYPE (GstOss4MixerSwitch, gst_oss4_mixer_switch, GST_TYPE_MIXER_TRACK);
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static void
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gst_oss4_mixer_switch_class_init (GstOss4MixerSwitchClass * klass)
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{
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/* nothing to do here */
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}
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static void
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gst_oss4_mixer_switch_init (GstOss4MixerSwitch * s)
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{
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/* nothing to do here */
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}
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gboolean
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gst_oss4_mixer_switch_set (GstOss4MixerSwitch * s, gboolean disabled)
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{
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GstMixerTrack *track;
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int newval;
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track = GST_MIXER_TRACK (s);
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newval = disabled ? GST_MIXER_TRACK_MUTE : 0;
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if (newval == (track->flags & GST_MIXER_TRACK_MUTE)) {
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GST_LOG_OBJECT (s, "switch is already %d, doing nothing", newval);
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return TRUE;
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}
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if (!gst_oss4_mixer_set_control_val (s->mixer, s->mc, !disabled)) {
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GST_WARNING_OBJECT (s, "could not set switch to %d", !disabled);
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return FALSE;
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}
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if (disabled) {
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track->flags |= GST_MIXER_TRACK_MUTE;
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} else {
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track->flags &= ~GST_MIXER_TRACK_MUTE;
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}
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GST_LOG_OBJECT (s, "set switch to %d", newval);
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return TRUE;
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}
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gboolean
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gst_oss4_mixer_switch_get (GstOss4MixerSwitch * s, gboolean * disabled)
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{
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GstMixerTrack *track;
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int enabled = -1;
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track = GST_MIXER_TRACK (s);
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if (!gst_oss4_mixer_get_control_val (s->mixer, s->mc, &enabled)
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|| (enabled < 0)) {
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GST_WARNING_OBJECT (s, "could not get switch state");
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return FALSE;
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}
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if (enabled) {
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track->flags &= ~GST_MIXER_TRACK_MUTE;
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} else {
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track->flags |= GST_MIXER_TRACK_MUTE;
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}
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*disabled = (enabled == 0);
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return TRUE;
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}
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GstMixerTrack *
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gst_oss4_mixer_switch_new (GstOss4Mixer * mixer, GstOss4MixerControl * mc)
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{
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GstOss4MixerSwitch *s;
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GstMixerTrack *track;
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int cur = -1;
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s = g_object_new (GST_TYPE_OSS4_MIXER_SWITCH, "untranslated-label",
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mc->mixext.extname, NULL);
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s->mixer = mixer;
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s->mc = mc;
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track = GST_MIXER_TRACK (s);
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/* caller will set track->label and track->flags */
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track->num_channels = 0;
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track->min_volume = 0;
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track->max_volume = 0;
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if (!gst_oss4_mixer_get_control_val (s->mixer, s->mc, &cur) || cur < 0)
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return NULL;
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if (cur) {
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track->flags &= ~GST_MIXER_TRACK_MUTE;
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} else {
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track->flags |= GST_MIXER_TRACK_MUTE;
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}
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return track;
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}
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/* This is called from the watch thread */
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void
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gst_oss4_mixer_switch_process_change_unlocked (GstMixerTrack * track)
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{
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GstOss4MixerSwitch *s = GST_OSS4_MIXER_SWITCH_CAST (track);
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if (!s->mc->changed)
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return;
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gst_mixer_mute_toggled (GST_MIXER (s->mixer), track, !s->mc->last_val);
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}
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