Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not full...

Original commit message from CVS:
Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not fully implemented yet. for OSS, this will cause issues, but for ALSA, this is all automated.

gst-libs/gst/mixer/Makefile.am

@@ -1,10 +1,15 @@
+libgstinterfacesincludedir = \
+	$(includedir)/gstreamer-@GST_MAJORMINOR@/gst/mixer
+
+libgstinterfacesinclude_HEADERS = \
+	mixer.h \
+	mixertrack.h
+
 lib_LTLIBRARIES = libgstmixer.la
 
-libgstmixer_la_SOURCES = mixer.c
-
-libgstmixerincludedir = $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/mixer
-libgstmixerinclude_HEADERS = mixer.h
-
-libgstmixer_la_LIBADD =
+libgstmixer_la_SOURCES = \
+	mixer.c \
+	mixertrack.c
+libgstmixer_la_LIBADD = 
 libgstmixer_la_CFLAGS = $(GST_CFLAGS) $(GST_OPT_CFLAGS)
 libgstmixer_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)

gst-libs/gst/mixer/mixer.c

@@ -23,7 +23,7 @@
 #include "config.h"
 #endif
 
-#include <gst/mixer/mixer.h>
+#include "mixer.h"
 
 static void 	gst_mixer_class_init	(GstMixerClass *klass);
 
@@ -67,7 +67,7 @@ gst_mixer_class_init (GstMixerClass *klass)
 }
 
 const GList *
-gst_mixer_list_tracks	(GstMixer *mixer)
+gst_mixer_list_tracks (GstMixer *mixer)
 {
   GstMixerClass *klass = GST_MIXER_GET_CLASS (mixer);
 

gst-libs/gst/mixer/mixer.h

@@ -23,6 +23,7 @@
 #define __GST_MIXER_H__
 
 #include <gst/gst.h>
+#include <gst/mixer/mixertrack.h>
 
 G_BEGIN_DECLS
 
@@ -39,34 +40,6 @@ G_BEGIN_DECLS
 #define GST_MIXER_GET_CLASS(inst) \
   (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_MIXER, GstMixerClass))
 
-/* In this interface, a `track' is a unit of recording or playback, pretty much
- * equivalent to what comes in or goes out through a GstPad. Each track can have
- * one or more `channels', which are logical parts of the track. A `stereo
- * track', then, would be one stream with two channels, while a `mono track'
- * would be a stream with a single channel. More complex examples are possible
- * as well ; for example, professional audio hardware might handle audio tracks
- * with 8 or 16 channels each.
- *
- * All these are audio terms. I don't know exactly what this would translate to
- * for video, but a track might be an entire video stream, and a channel might
- * be the information for one of the colors in the stream.
- */
-
-#define GST_MIXER_TRACK_INPUT  (1<<0)
-#define GST_MIXER_TRACK_OUTPUT (1<<1)
-#define GST_MIXER_TRACK_MUTE   (1<<2)
-#define GST_MIXER_TRACK_RECORD (1<<3)
-
-typedef struct _GstMixerTrack {
-  gchar *label;
-  gint   num_channels,
-         flags,
-	 min_volume, max_volume;
-} GstMixerTrack;
-
-#define GST_MIXER_TRACK_HAS_FLAG(track, flag) \
-  ((track)->flags & flag)
-
 typedef struct _GstMixer GstMixer;
 
 typedef struct _GstMixerClass {

gst-libs/gst/mixer/mixertrack.c

@@ -0,0 +1,122 @@
+/* GStreamer Mixer
+ * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * mixertrack.c: mixer track object design
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "mixertrack.h"
+
+enum {
+  /* FILL ME */
+  SIGNAL_VOLUME_CHANGED,
+  SIGNAL_RECORD_TOGGLED,
+  SIGNAL_MUTE_TOGGLED,
+  LAST_SIGNAL
+};
+
+static void gst_mixer_track_class_init (GstMixerTrackClass *klass);
+static void gst_mixer_track_init       (GstMixerTrack      *mixer);
+static void gst_mixer_track_dispose    (GObject            *object);
+
+static GObjectClass *parent_class = NULL;
+static guint signals[LAST_SIGNAL] = { 0 };
+
+GType
+gst_mixer_track_get_type (void)
+{
+  static GType gst_mixer_track_type = 0;
+
+  if (!gst_mixer_track_type) {
+    static const GTypeInfo mixer_track_info = {
+      sizeof (GstMixerTrackClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gst_mixer_track_class_init,
+      NULL,
+      NULL,
+      sizeof (GstMixerTrack),
+      0,
+      (GInstanceInitFunc) gst_mixer_track_init,
+      NULL
+    };
+
+    gst_mixer_track_type =
+	g_type_register_static (G_TYPE_OBJECT,
+				"GstMixerTrack",
+				&mixer_track_info, 0);
+  }
+
+  return gst_mixer_track_type;
+}
+
+static void
+gst_mixer_track_class_init (GstMixerTrackClass *klass)
+{
+  GObjectClass *object_klass = (GObjectClass *) klass;
+
+  parent_class = g_type_class_ref (G_TYPE_OBJECT);
+
+  signals[SIGNAL_RECORD_TOGGLED] =
+    g_signal_new ("record_toggled", G_TYPE_FROM_CLASS (klass),
+		  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (GstMixerTrackClass,
+				   record_toggled),
+                  NULL, NULL, g_cclosure_marshal_VOID__BOOLEAN,
+                  G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
+  signals[SIGNAL_MUTE_TOGGLED] =
+    g_signal_new ("mute_toggled", G_TYPE_FROM_CLASS (klass),
+		  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (GstMixerTrackClass,
+				   mute_toggled),
+                  NULL, NULL, g_cclosure_marshal_VOID__BOOLEAN,
+                  G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
+  signals[SIGNAL_VOLUME_CHANGED] =
+    g_signal_new ("volume_changed", G_TYPE_FROM_CLASS (klass),
+		  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (GstMixerTrackClass,
+				   volume_changed),
+                  NULL, NULL, g_cclosure_marshal_VOID__POINTER,
+                  G_TYPE_NONE, 1, G_TYPE_POINTER);
+
+  object_klass->dispose = gst_mixer_track_dispose;
+}
+
+static void
+gst_mixer_track_init (GstMixerTrack *channel)
+{
+  channel->label = NULL;
+  channel->min_volume = channel->max_volume = 0;
+  channel->flags = 0;
+  channel->num_channels = 0;
+}
+
+static void
+gst_mixer_track_dispose (GObject *object)
+{
+  GstMixerTrack *channel = GST_MIXER_TRACK (object);
+
+  if (channel->label)
+    g_free (channel->label);
+
+  if (parent_class->dispose)
+    parent_class->dispose (object);
+}

gst-libs/gst/mixer/mixertrack.h

@@ -0,0 +1,86 @@
+/* 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.
+ */
+
+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),
+} GstMixerTrackFlags;
+
+#define GST_MIXER_TRACK_HAS_FLAG(channel, flag) \
+  ((channel)->flags & flag)
+
+typedef struct _GstMixerTrack {
+  GObject            parent;
+
+  gchar             *label;
+  GstMixerTrackFlags flags;
+  gint               num_channels,
+	             min_volume,
+	             max_volume;
+} GstMixerTrack;
+
+typedef struct _GstMixerTrackClass {
+  GObjectClass parent;
+
+  void (* mute_toggled)   (GstMixerTrack *channel,
+			   gboolean       on);
+  void (* record_toggled) (GstMixerTrack *channel,
+			   gboolean       on);
+  void (* volume_changed) (GstMixerTrack *channel,
+			   gint          *volumes);
+} GstMixerTrackClass;
+
+GType		gst_mixer_track_get_type	(void);
+
+G_END_DECLS
+
+#endif /* __GST_MIXER_TRACK_H__ */