--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst-libs/gst/interfaces/mixertrack.h	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,112 @@
+/* GStreamer Mixer
+ * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * mixertrack.h: mixer track object
+ *
+ * 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.
+ */
+
+#ifndef __GST_MIXER_TRACK_H__
+#define __GST_MIXER_TRACK_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_MIXER_TRACK \
+  (gst_mixer_track_get_type ())
+#define GST_MIXER_TRACK(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MIXER_TRACK, \
+                               GstMixerTrack))
+#define GST_MIXER_TRACK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MIXER_TRACK, \
+                            GstMixerTrackClass))
+#define GST_IS_MIXER_TRACK(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MIXER_TRACK))
+#define GST_IS_MIXER_TRACK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MIXER_TRACK))
+
+/*
+ * Naming:
+ *
+ * A track is a single input/output stream (e.g. line-in,
+ * microphone, etc.). Channels are then single streams
+ * within a track. A mono stream has one channel, a stereo
+ * stream has two, etc.
+ *
+ * Input tracks can have 'recording' enabled, which means
+ * that any input will be hearable into the speakers that
+ * are attached to the output. Mute is obvious. A track
+ * flagged as master is the master volume track on this
+ * mixer, which means that setting this track will change
+ * the hearable volume on any output.
+ */
+
+typedef enum {
+  GST_MIXER_TRACK_INPUT  = (1<<0),
+  GST_MIXER_TRACK_OUTPUT = (1<<1),
+  GST_MIXER_TRACK_MUTE   = (1<<2),
+  GST_MIXER_TRACK_RECORD = (1<<3),
+  GST_MIXER_TRACK_MASTER = (1<<4),
+  GST_MIXER_TRACK_SOFTWARE = (1<<5)
+} GstMixerTrackFlags;
+
+#define GST_MIXER_TRACK_HAS_FLAG(channel, flag) \
+  ((channel)->flags & flag)
+
+typedef struct _GstMixerTrack GstMixerTrack;
+typedef struct _GstMixerTrackClass GstMixerTrackClass;
+
+struct _GstMixerTrack {
+  GObject            parent;
+
+  gchar             *label;
+
+  /* FIXME 0.11: flags should be guint32 */
+  GstMixerTrackFlags flags;
+
+  gint               num_channels;
+  gint               min_volume;
+  gint               max_volume;
+
+  /* FIXME 0.11: add padding */
+};
+
+struct _GstMixerTrackClass {
+  GObjectClass parent;
+
+#ifdef GST_MIXER_NEED_DEPRECATED
+  /* signals (deprecated) */
+  void (* mute_toggled)   (GstMixerTrack *channel,
+                           gboolean       mute);
+  void (* record_toggled) (GstMixerTrack *channel,
+                           gboolean       record);
+  void (* volume_changed) (GstMixerTrack *channel,
+                           gint          *volumes);
+#endif /* GST_MIXER_NEED_DEPRECATED */
+
+  gpointer _gst_reserved[GST_PADDING];
+};
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+GType           gst_mixer_track_get_type        (void);
+
+G_END_DECLS
+
+#endif /* __GST_MIXER_TRACK_H__ */