1 files changed, 169 insertions, 0 deletions
diff --git a/sys/oss4/oss4-mixer-switch.c b/sys/oss4/oss4-mixer-switch.c
new file mode 100644
index 00000000..403abbc5
--- /dev/null
+++ b/sys/oss4/oss4-mixer-switch.c
@@ -0,0 +1,169 @@
+/* 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 */
+}
+
+static GstMixerTrackFlags
+gst_oss4_mixer_switch_get_switch_flag (GstMixerTrack * track)
+{
+  if ((track->flags & GST_MIXER_TRACK_INPUT)) {
+    return GST_MIXER_TRACK_RECORD;
+  } else if ((track->flags & GST_MIXER_TRACK_OUTPUT)) {
+    return GST_MIXER_TRACK_MUTE;
+  } else {
+    GST_ERROR_OBJECT (track, "switch neither input nor output track!?");
+  }
+  return 0;
+}
+
+gboolean
+gst_oss4_mixer_switch_set (GstOss4MixerSwitch * s, gboolean enabled)
+{
+  GstMixerTrackFlags switch_flag;
+  GstMixerTrack *track;
+  int newval;
+
+  track = GST_MIXER_TRACK (s);
+  switch_flag = gst_oss4_mixer_switch_get_switch_flag (track);
+
+  newval = (enabled) ? 1 : 0;
+
+  if (!!newval == !!(track->flags & switch_flag)) {
+    GST_LOG_OBJECT (s, "switch is already %d, doing nothing", newval);
+    return TRUE;
+  }
+
+  if (!gst_oss4_mixer_set_control_val (s->mixer, s->mc, newval)) {
+    GST_WARNING_OBJECT (s, "could not set switch to %d", newval);
+    return FALSE;
+  }
+
+  if (newval) {
+    track->flags |= switch_flag;
+  } else {
+    track->flags &= ~switch_flag;
+  }
+
+  GST_LOG_OBJECT (s, "set switch to %d", newval);
+
+  return TRUE;
+}
+
+gboolean
+gst_oss4_mixer_switch_get (GstOss4MixerSwitch * s, gboolean * enabled)
+{
+  GstMixerTrackFlags switch_flag;
+  GstMixerTrack *track;
+  int val = -1;
+
+  track = GST_MIXER_TRACK (s);
+  switch_flag = gst_oss4_mixer_switch_get_switch_flag (track);
+
+  if (!gst_oss4_mixer_get_control_val (s->mixer, s->mc, &val) || val < 0) {
+    GST_WARNING_OBJECT (s, "could not get switch state");
+    return FALSE;
+  }
+
+  *enabled = (val != 0);
+
+  if (!!val != !!(track->flags & switch_flag)) {
+    GST_INFO_OBJECT (s, "updating inconsistent switch state to %d", !!val);
+    if (*enabled) {
+      track->flags |= switch_flag;
+    } else {
+      track->flags &= ~switch_flag;
+    }
+  }
+
+
+  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;
+
+  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;
+
+  if ((track->flags & GST_MIXER_TRACK_INPUT)) {
+    gst_mixer_record_toggled (GST_MIXER (s->mixer), track, !!s->mc->last_val);
+  } else {
+    gst_mixer_mute_toggled (GST_MIXER (s->mixer), track, !!s->mc->last_val);
+  }
+}