sys/sunaudio/: Fix caps to handle full range of rates and channels. Make debugging less obnoxious.

Original commit message from CVS:
* sys/sunaudio/Makefile.am:
* sys/sunaudio/gstsunaudio.c: Fix caps to handle full range
of rates and channels.  Make debugging less obnoxious.
Patch from Balamurali Viswanathan implementing a mixer for
Sun audio.  (bug #144091):
* sys/sunaudio/gstsunelement.c:
* sys/sunaudio/gstsunelement.h:
* sys/sunaudio/gstsunmixer.c:
* sys/sunaudio/gstsunmixer.h:

6 files changed, 933 insertions, 14 deletions

diff --git a/sys/sunaudio/Makefile.am b/sys/sunaudio/Makefile.am
index 29221858..5773575f 100644
--- a/sys/sunaudio/Makefile.am
+++ b/sys/sunaudio/Makefile.am
@@ -1,8 +1,14 @@
 plugin_LTLIBRARIES = libgstsunaudio.la
 
-libgstsunaudio_la_SOURCES = gstsunaudio.c
+libgstsunaudio_la_SOURCES = gstsunaudio.c   \
+                            gstsunelement.c \
+                            gstsunmixer.c
+
 
 libgstsunaudio_la_CFLAGS = $(GST_CFLAGS)
 libgstsunaudio_la_LIBADD = $(top_builddir)/gst-libs/gst/libgstinterfaces-@GST_MAJORMINOR@.la
 libgstsunaudio_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 
+noinst_HEADERS = gstsunelement.h \
+                 gstsunmixer.h
+
diff --git a/sys/sunaudio/gstsunaudio.c b/sys/sunaudio/gstsunaudio.c
index de24afc3..057ec2bc 100644
--- a/sys/sunaudio/gstsunaudio.c
+++ b/sys/sunaudio/gstsunaudio.c
@@ -29,6 +29,8 @@
 #include <unistd.h>
 #include <sys/mman.h>
 #include <sys/audioio.h>
+#include "gstsunelement.h"
+#include "gstsunmixer.h"
 
 
 #define GST_TYPE_SUNAUDIOSINK \
@@ -97,10 +99,9 @@ GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS ("audio/x-raw-int, "
         "endianness = (int) BYTE_ORDER, "
-        "signed = (boolean) { TRUE, FALSE }, "
-        "width = (int) { 8, 16 }, "
-        "depth = (int) { 8, 16 }, "
-        "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
+        "signed = (boolean) TRUE, " "width = (int) 16, " "depth = (int) 16, "
+        /* [5510,48000] seems to be a Solaris limit */
+        "rate = (int) [ 5510, 48000 ], " "channels = (int) [ 1, 2 ]")
     );
 
 static void gst_sunaudiosink_base_init (gpointer g_class);
@@ -192,6 +193,8 @@ gst_sunaudiosink_class_init (GstSunAudioSinkClass * klass)
 static void
 gst_sunaudiosink_init (GstSunAudioSink * sunaudiosink)
 {
+  const char *audiodev;
+
   sunaudiosink->sinkpad =
       gst_pad_new_from_template (gst_static_pad_template_get
       (&gst_sunaudiosink_sink_factory), "sink");
@@ -203,7 +206,11 @@ gst_sunaudiosink_init (GstSunAudioSink * sunaudiosink)
   gst_pad_set_chain_function (sunaudiosink->sinkpad, gst_sunaudiosink_chain);
 
   sunaudiosink->buffer_size = 64;
-  sunaudiosink->device = g_strdup ("/dev/audio");
+
+  audiodev = g_getenv ("AUDIODEV");
+  if (audiodev == NULL)
+    audiodev = "/dev/audio";
+  sunaudiosink->device = g_strdup (audiodev);
 }
 
 static GstCaps *
@@ -212,12 +219,8 @@ gst_sunaudiosink_getcaps (GstPad * pad)
   GstSunAudioSink *sunaudiosink = GST_SUNAUDIOSINK (gst_pad_get_parent (pad));
   GstCaps *caps;
 
-  caps = gst_caps_from_string ("audio/x-raw-int, "
-      "endianness = (int) BYTE_ORDER, "
-      "signed = (boolean) TRUE, "
-      "width = (int) 16, "
-      "depth = (int) 16, " "rate = (int) 44100, " "channels = (int) 1");
-  GST_ERROR ("getcaps called on %" GST_PTR_FORMAT ", returning %"
+  caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
+  GST_DEBUG ("getcaps called on %" GST_PTR_FORMAT ", returning %"
       GST_PTR_FORMAT, pad, caps);
 
   return caps;
@@ -241,7 +244,7 @@ gst_sunaudiosink_pad_link (GstPad * pad, const GstCaps * caps)
   } else {
     ret = GST_PAD_LINK_REFUSED;
   }
-  GST_ERROR ("pad_link called on %" GST_PTR_FORMAT " with caps %"
+  GST_DEBUG ("pad_link called on %" GST_PTR_FORMAT " with caps %"
       GST_PTR_FORMAT ", returning %d", pad, caps, ret);
 
   return ret;
@@ -426,7 +429,9 @@ static gboolean
 plugin_init (GstPlugin * plugin)
 {
   if (!gst_element_register (plugin, "sunaudiosink", GST_RANK_NONE,
-          GST_TYPE_SUNAUDIOSINK))
+          GST_TYPE_SUNAUDIOSINK) ||
+      !gst_element_register (plugin, "sunaudiomixer", GST_RANK_NONE,
+          GST_TYPE_SUNAUDIOELEMENT))
     return FALSE;
 
   return TRUE;
diff --git a/sys/sunaudio/gstsunelement.c b/sys/sunaudio/gstsunelement.c
new file mode 100644
index 00000000..64184041
--- /dev/null
+++ b/sys/sunaudio/gstsunelement.c
@@ -0,0 +1,497 @@
+/*
+ * GStreamer
+ * Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) 2004 David A. Schleef <ds@schleef.org>
+ *
+ * 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 <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+#include "gstsunelement.h"
+#include  "gstsunmixer.h"
+
+#include <gst/propertyprobe/propertyprobe.h>
+
+enum
+{
+  ARG_0,
+  ARG_DEVICE,
+  ARG_MIXERDEV,
+  ARG_DEVICE_NAME,
+};
+
+/* elementfactory information */
+static GstElementDetails gst_sunaudioelement_details =
+GST_ELEMENT_DETAILS ("SunAudioMixer",
+    "Generic/Audio",
+    "Audio mixer for Sun Audio devices",
+    "Balamurali Viswanathan <balamurali.viswanathan@wipro.com>");
+
+static void gst_sunaudioelement_base_init (GstSunAudioElementClass * klass);
+static void gst_sunaudioelement_class_init (GstSunAudioElementClass * klass);
+
+static void gst_sunaudioprobe_interface_init (GstPropertyProbeInterface *
+    iface);
+static void gst_sunaudioelement_init (GstSunAudioElement * sunaudio);
+static void gst_sunaudioelement_dispose (GObject * object);
+
+static void gst_sunaudioelement_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec);
+
+static void gst_sunaudioelement_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec);
+
+static GstElementStateReturn gst_sunaudioelement_change_state (GstElement *
+    element);
+
+static GstElementClass *parent_class = NULL;
+
+static gboolean gst_sunaudioelement_open_audio (GstSunAudioElement * sunaudio);
+static gboolean gst_sunaudioelement_close_audio (GstSunAudioElement * sunaudio);
+void gst_sunaudioelement_reset (GstSunAudioElement * sunaudio);
+
+GType
+gst_sunaudioelement_get_type (void)
+{
+  static GType sunaudioelement_type = 0;
+
+  if (!sunaudioelement_type) {
+    static const GTypeInfo sunaudioelement_info = {
+      sizeof (GstSunAudioElementClass),
+      (GBaseInitFunc) gst_sunaudioelement_base_init,
+      NULL,
+      (GClassInitFunc) gst_sunaudioelement_class_init,
+      NULL,
+      NULL,
+      sizeof (GstSunAudioElement),
+      0,
+      (GInstanceInitFunc) gst_sunaudioelement_init
+    };
+    static const GInterfaceInfo sunaudioiface_info = {
+      (GInterfaceInitFunc) gst_sunaudio_interface_init,
+      NULL,
+      NULL
+    };
+    static const GInterfaceInfo sunaudiomixer_info = {
+      (GInterfaceInitFunc) gst_sunaudiomixer_interface_init,
+      NULL,
+      NULL
+    };
+    static const GInterfaceInfo sunaudioprobe_info = {
+      (GInterfaceInitFunc) gst_sunaudioprobe_interface_init,
+      NULL,
+      NULL
+    };
+
+    sunaudioelement_type = g_type_register_static (GST_TYPE_ELEMENT,
+        "GstSunAudioElement", &sunaudioelement_info, 0);
+    g_type_add_interface_static (sunaudioelement_type,
+        GST_TYPE_IMPLEMENTS_INTERFACE, &sunaudioiface_info);
+    g_type_add_interface_static (sunaudioelement_type,
+        GST_TYPE_MIXER, &sunaudiomixer_info);
+    g_type_add_interface_static (sunaudioelement_type,
+        GST_TYPE_PROPERTY_PROBE, &sunaudioprobe_info);
+  }
+
+  return sunaudioelement_type;
+}
+
+static void
+gst_sunaudioelement_base_init (GstSunAudioElementClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  klass->device_combinations = NULL;
+
+  gst_element_class_set_details (element_class, &gst_sunaudioelement_details);
+}
+
+static void
+gst_sunaudioelement_class_init (GstSunAudioElementClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DEVICE,
+      g_param_spec_string ("device", "Device",
+          "SunAudio device (/dev/audioctl usually)", "default",
+          G_PARAM_READWRITE));
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MIXERDEV,
+      g_param_spec_string ("mixerdev", "Mixer device",
+          "SunAudio mixer device (/dev/audioctl usually)", "default",
+          G_PARAM_READWRITE));
+  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DEVICE_NAME,
+      g_param_spec_string ("device_name", "Device name", "Name of the device",
+          NULL, G_PARAM_READABLE));
+
+  gobject_class->set_property = gst_sunaudioelement_set_property;
+  gobject_class->get_property = gst_sunaudioelement_get_property;
+  gobject_class->dispose = gst_sunaudioelement_dispose;
+
+  gstelement_class->change_state = gst_sunaudioelement_change_state;
+}
+
+static GList *
+device_combination_append (GList * device_combinations,
+    GstSunAudioDeviceCombination * combi)
+{
+  GList *it;
+
+  for (it = device_combinations; it != NULL; it = it->next) {
+    GstSunAudioDeviceCombination *cur;
+
+    cur = (GstSunAudioDeviceCombination *) it->data;
+    if (cur->dev == combi->dev) {
+      return device_combinations;
+    }
+  }
+
+  return g_list_append (device_combinations, combi);
+}
+
+static gboolean
+gst_sunaudioelement_class_probe_devices (GstSunAudioElementClass * klass,
+    gboolean check)
+{
+  GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
+  gint openmode = O_RDONLY;
+  GList *padtempllist;
+  static GList *device_combinations;
+  static gboolean init = FALSE;
+  int fd;
+
+  padtempllist = gst_element_class_get_pad_template_list (eklass);
+  if (padtempllist != NULL) {
+    GstPadTemplate *firstpadtempl = padtempllist->data;
+
+    if (GST_PAD_TEMPLATE_DIRECTION (firstpadtempl) == GST_PAD_SINK) {
+      openmode = O_WRONLY;
+    }
+  }
+
+
+  if (!init && !check) {
+    if ((fd = open ("/dev/audioctl", openmode | O_NONBLOCK)) > 0
+        || errno == EBUSY) {
+      GstSunAudioDeviceCombination *combi;
+
+      if (fd > 0)
+        close (fd);
+
+      combi = g_new0 (GstSunAudioDeviceCombination, 1);
+      combi->mixer = g_strdup ("/dev/audioctl");
+      device_combinations =
+          device_combination_append (device_combinations, combi);
+    }
+    init = TRUE;
+  }
+
+  klass->device_combinations = device_combinations;
+
+  return init;
+}
+
+static void
+gst_sunaudioprobe_probe_property (GstPropertyProbe * probe,
+    guint prop_id, const GParamSpec * pspec)
+{
+  GstSunAudioElementClass *klass = GST_SUNAUDIOELEMENT_GET_CLASS (probe);
+
+  switch (prop_id) {
+    case ARG_DEVICE:
+      gst_sunaudioelement_class_probe_devices (klass, FALSE);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+      break;
+  }
+}
+
+static gboolean
+gst_sunaudioprobe_needs_probe (GstPropertyProbe * probe,
+    guint prop_id, const GParamSpec * pspec)
+{
+  GstSunAudioElementClass *klass = GST_SUNAUDIOELEMENT_GET_CLASS (probe);
+  gboolean ret = FALSE;
+
+  switch (prop_id) {
+    case ARG_DEVICE:
+      ret = !gst_sunaudioelement_class_probe_devices (klass, TRUE);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+      break;
+  }
+
+  return ret;
+}
+
+static const GList *
+gst_sunaudioprobe_get_properties (GstPropertyProbe * probe)
+{
+  GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
+  static GList *list = NULL;
+
+  if (!list) {
+    list = g_list_append (NULL, g_object_class_find_property (klass, "device"));
+  }
+
+  return list;
+}
+
+static GValueArray *
+gst_sunaudioelement_class_list_devices (GstSunAudioElementClass * klass)
+{
+  GValueArray *array;
+  GValue value = { 0 };
+  GList *item;
+
+  if (!klass->device_combinations) {
+    return NULL;
+  }
+
+  array = g_value_array_new (g_list_length (klass->device_combinations));
+  item = klass->device_combinations;
+  g_value_init (&value, G_TYPE_STRING);
+  while (item) {
+    GstSunAudioDeviceCombination *combi = item->data;
+
+    g_value_set_string (&value, combi->mixer);
+    g_value_array_append (array, &value);
+
+    item = item->next;
+  }
+  g_value_unset (&value);
+
+  return array;
+}
+
+static GValueArray *
+gst_sunaudioprobe_get_values (GstPropertyProbe * probe,
+    guint prop_id, const GParamSpec * pspec)
+{
+  GstSunAudioElementClass *klass = GST_SUNAUDIOELEMENT_GET_CLASS (probe);
+  GValueArray *array = NULL;
+
+  switch (prop_id) {
+    case ARG_DEVICE:
+      array = gst_sunaudioelement_class_list_devices (klass);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+      break;
+  }
+
+  return array;
+}
+
+static void
+gst_sunaudioprobe_interface_init (GstPropertyProbeInterface * iface)
+{
+  iface->get_properties = gst_sunaudioprobe_get_properties;
+  iface->probe_property = gst_sunaudioprobe_probe_property;
+  iface->needs_probe = gst_sunaudioprobe_needs_probe;
+  iface->get_values = gst_sunaudioprobe_get_values;
+}
+
+static void
+gst_sunaudioelement_init (GstSunAudioElement * sunaudio)
+{
+  sunaudio->device = g_strdup ("/dev/audio");
+  sunaudio->mixer_dev = g_strdup ("/dev/audioctl");
+  sunaudio->fd = -1;
+  sunaudio->mixer_fd = -1;
+  sunaudio->tracklist = NULL;
+  sunaudio->device_name = NULL;
+
+  gst_sunaudioelement_reset (sunaudio);
+}
+
+void
+gst_sunaudioelement_reset (GstSunAudioElement * sunaudio)
+{
+  return;
+}
+
+static void
+gst_sunaudioelement_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+  GstSunAudioElement *sunaudio = GST_SUNAUDIOELEMENT (object);
+
+  switch (prop_id) {
+    case ARG_DEVICE:
+      if (gst_element_get_state (GST_ELEMENT (sunaudio)) == GST_STATE_NULL) {
+        g_free (sunaudio->device);
+        sunaudio->device = g_strdup (g_value_get_string (value));
+
+        if (GST_SUNAUDIOELEMENT_GET_CLASS (sunaudio)->device_combinations !=
+            NULL) {
+          GList *list =
+              GST_SUNAUDIOELEMENT_GET_CLASS (sunaudio)->device_combinations;
+
+          while (list) {
+            GstSunAudioDeviceCombination *combi = list->data;
+
+            if (!strcmp (combi->mixer, sunaudio->device)) {
+              g_free (sunaudio->mixer_dev);
+              sunaudio->mixer_dev = g_strdup (combi->mixer);
+              break;
+            }
+
+            list = list->next;
+          }
+        }
+      }
+      break;
+    case ARG_MIXERDEV:
+      if (gst_element_get_state (GST_ELEMENT (sunaudio)) == GST_STATE_NULL) {
+        g_free (sunaudio->mixer_dev);
+        sunaudio->mixer_dev = g_strdup (g_value_get_string (value));
+      }
+      break;
+    default:
+      break;
+  }
+}
+
+static void
+gst_sunaudioelement_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec)
+{
+  GstSunAudioElement *sunaudio = GST_SUNAUDIOELEMENT (object);
+
+  switch (prop_id) {
+    case ARG_DEVICE:
+      g_value_set_string (value, sunaudio->device);
+      break;
+    case ARG_MIXERDEV:
+      g_value_set_string (value, sunaudio->mixer_dev);
+      break;
+    case ARG_DEVICE_NAME:
+      g_value_set_string (value, sunaudio->device_name);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_sunaudioelement_dispose (GObject * object)
+{
+  GstSunAudioElement *sunaudio = (GstSunAudioElement *) object;
+
+  g_free (sunaudio->device);
+  g_free (sunaudio->mixer_dev);
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static GstElementStateReturn
+gst_sunaudioelement_change_state (GstElement * element)
+{
+  GstSunAudioElement *sunaudio = GST_SUNAUDIOELEMENT (element);
+
+  switch (GST_STATE_TRANSITION (element)) {
+    case GST_STATE_NULL_TO_READY:
+      if (!gst_sunaudioelement_open_audio (sunaudio)) {
+        return GST_STATE_FAILURE;
+      }
+      GST_INFO ("opened sound device");
+      break;
+    case GST_STATE_READY_TO_NULL:
+      gst_sunaudioelement_close_audio (sunaudio);
+      gst_sunaudioelement_reset (sunaudio);
+      GST_INFO ("closed sound device");
+      break;
+    default:
+      break;
+  }
+
+  if (GST_ELEMENT_CLASS (parent_class)->change_state)
+    return GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+  return GST_STATE_SUCCESS;
+}
+
+static gboolean
+gst_sunaudioelement_open_audio (GstSunAudioElement * sunaudio)
+{
+  gint caps;
+  GstSunAudioOpenMode mode = GST_SUNAUDIOELEMENT_READ;
+  const GList *padlist;
+
+  g_return_val_if_fail (sunaudio->fd == -1, FALSE);
+
+  padlist = gst_element_get_pad_list (GST_ELEMENT (sunaudio));
+
+  if (padlist != NULL) {
+    GstPad *firstpad = padlist->data;
+
+    if (GST_PAD_IS_SINK (firstpad)) {
+      mode = GST_SUNAUDIOELEMENT_WRITE;
+    }
+  }
+
+  if (mode == GST_SUNAUDIOELEMENT_WRITE) {
+    sunaudio->fd = open (sunaudio->device, O_WRONLY | O_NONBLOCK);
+
+    if (sunaudio->fd >= 0) {
+      close (sunaudio->fd);
+
+      sunaudio->fd = open (sunaudio->device, O_WRONLY);
+    }
+  } else {
+    sunaudio->fd = open (sunaudio->device, O_RDONLY);
+  }
+
+  if (sunaudio->fd < 0) {
+    switch (errno) {
+      default:
+        printf ("could not open device\n");
+    }
+    return FALSE;
+  }
+
+  sunaudio->mode = mode;
+  gst_sunaudiomixer_build_list (sunaudio);
+  return TRUE;
+
+}
+
+static gboolean
+gst_sunaudioelement_close_audio (GstSunAudioElement * sunaudio)
+{
+  close (sunaudio->fd);
+  sunaudio->fd = -1;
+}
diff --git a/sys/sunaudio/gstsunelement.h b/sys/sunaudio/gstsunelement.h
new file mode 100644
index 00000000..86d5ca93
--- /dev/null
+++ b/sys/sunaudio/gstsunelement.h
@@ -0,0 +1,63 @@
+#ifndef __GST_SUNAUDIO_ELEMENT_H__
+#define __GST_SUNAUDIO_ELEMENT_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_SUNAUDIOELEMENT \
+  (gst_sunaudioelement_get_type())
+#define GST_SUNAUDIOELEMENT(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SUNAUDIOELEMENT,GstSunAudioElement))
+#define GST_SUNAUDIOELEMENT_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SUNAUDIOELEMENT,GstSunAudioElementClass))
+#define GST_IS_SUNAUDIOELEMENT(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SUNAUDIOELEMENT))
+#define GST_IS_SUNAUDIOELEMENT_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SUNAUDIOELEMENT))
+#define GST_SUNAUDIOELEMENT_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_SUNAUDIOELEMENT, GstSunAudioElementClass))
+
+typedef enum {
+  GST_SUNAUDIOELEMENT_READ,
+  GST_SUNAUDIOELEMENT_WRITE,
+} GstSunAudioOpenMode;
+
+
+struct _GstSunAudioElement
+{
+  /* yes, we're a gstelement too */
+  GstElement     parent;
+                                                                                
+  gchar         *device,
+                *mixer_dev;
+        
+  /* device state */
+  int            fd;
+  GstSunAudioOpenMode mode;
+ 
+  /* mixer stuff */
+  GList         *tracklist;
+  gint           mixer_fd;
+  gchar         *device_name;
+};
+
+struct _GstSunAudioElementClass {
+  GstElementClass klass;
+ 
+  GList         *device_combinations;
+};
+
+typedef struct _GstSunAudioDeviceCombination {
+  gchar *mixer;
+  dev_t dev;
+} GstSunAudioDeviceCombination;
+
+typedef struct _GstSunAudioElement GstSunAudioElement;
+typedef struct _GstSunAudioElementClass GstSunAudioElementClass;
+
+GType           gst_sunaudioelement_get_type         (void);
+
+G_END_DECLS
+
+#endif
diff --git a/sys/sunaudio/gstsunmixer.c b/sys/sunaudio/gstsunmixer.c
new file mode 100644
index 00000000..f79b7725
--- /dev/null
+++ b/sys/sunaudio/gstsunmixer.c
@@ -0,0 +1,305 @@
+/*
+ * GStreamer
+ * Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) 2004 David A. Schleef <ds@schleef.org>
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/audioio.h>
+
+#include "gst/gst-i18n-plugin.h"
+#include "gstsunmixer.h"
+
+static void gst_sunaudiomixer_track_class_init (GstSunAudioMixerTrackClass *
+    klass);
+static void gst_sunaudiomixer_track_init (GstSunAudioMixerTrack * track);
+
+static gboolean gst_sunaudiomixer_supported (GstImplementsInterface * iface,
+    GType iface_type);
+static const GList *gst_sunaudiomixer_list_tracks (GstMixer * sunaudiomixer);
+static void gst_sunaudiomixer_set_volume (GstMixer * sunaudiomixer,
+    GstMixerTrack * track, gint * volumes);
+static void gst_sunaudiomixer_get_volume (GstMixer * sunaudiomixer,
+    GstMixerTrack * track, gint * volumes);
+static void gst_sunaudiomixer_set_mute (GstMixer * sunaudiomixer,
+    GstMixerTrack * track, gboolean mute);
+static void gst_sunaudiomixer_set_record (GstMixer * sunaudiomixer,
+    GstMixerTrack * track, gboolean record);
+
+#define MIXER_DEVICES 3
+static gchar **labels = NULL;
+static GstMixerTrackClass *parent_class = NULL;
+
+GType
+gst_sunaudiomixer_track_get_type (void)
+{
+  static GType gst_sunaudiomixer_track_type = 0;
+
+  if (!gst_sunaudiomixer_track_type) {
+    static const GTypeInfo sunaudiomixer_track_info = {
+      sizeof (GstSunAudioMixerTrackClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gst_sunaudiomixer_track_class_init,
+      NULL,
+      NULL,
+      sizeof (GstSunAudioMixerTrack),
+      0,
+      (GInstanceInitFunc) gst_sunaudiomixer_track_init,
+      NULL
+    };
+
+    gst_sunaudiomixer_track_type = g_type_register_static (GST_TYPE_MIXER_TRACK,
+        "GstSunAudioMixerTrack", &sunaudiomixer_track_info, 0);
+
+  }
+
+  return gst_sunaudiomixer_track_type;
+}
+
+static void
+gst_sunaudiomixer_track_class_init (GstSunAudioMixerTrackClass * klass)
+{
+  parent_class = g_type_class_ref (GST_TYPE_MIXER_TRACK);
+}
+
+static void
+gst_sunaudiomixer_track_init (GstSunAudioMixerTrack * track)
+{
+  track->lvol = track->rvol = 0;
+  track->track_num = 0;
+}
+
+void
+gst_sunaudio_interface_init (GstImplementsInterfaceClass * klass)
+{
+  /* default virtual functions */
+  klass->supported = gst_sunaudiomixer_supported;
+}
+
+static gboolean
+gst_sunaudiomixer_supported (GstImplementsInterface * iface, GType iface_type)
+{
+  g_assert (iface_type == GST_TYPE_MIXER);
+
+  return (GST_SUNAUDIOELEMENT (iface)->mixer_fd != -1);
+}
+
+void
+gst_sunaudiomixer_interface_init (GstMixerClass * klass)
+{
+  GST_MIXER_TYPE (klass) = GST_MIXER_HARDWARE;
+
+  klass->list_tracks = gst_sunaudiomixer_list_tracks;
+  klass->set_volume = gst_sunaudiomixer_set_volume;
+  klass->get_volume = gst_sunaudiomixer_get_volume;
+  klass->set_mute = gst_sunaudiomixer_set_mute;
+  klass->set_record = gst_sunaudiomixer_set_record;
+}
+
+static void
+fill_labels (void)
+{
+  int i;
+  struct
+  {
+    gchar *given, *wanted;
+  }
+  cases[] =
+  {
+    {
+    "Vol  ", N_("Volume")}
+    , {
+    "Gain ", N_("Gain")}
+    , {
+    "Mon  ", N_("Monitor")}
+    , {
+    NULL, NULL}
+  };
+
+  labels = g_malloc (sizeof (gchar *) * MIXER_DEVICES);
+
+  for (i = 0; i < MIXER_DEVICES; i++) {
+    labels[i] = g_strdup (cases[i].wanted);
+  }
+}
+
+GstMixerTrack *
+gst_sunaudiomixer_track_new (GstSunAudioElement * sunaudio,
+    gint track_num, gint max_chans, gint flags)
+{
+  GstSunAudioMixerTrack *sunaudiotrack;
+  GstMixerTrack *track;
+  gint volume;
+
+  if (!labels)
+    fill_labels ();
+
+  sunaudiotrack = g_object_new (GST_TYPE_SUNAUDIOMIXER_TRACK, NULL);
+  track = GST_MIXER_TRACK (sunaudiotrack);
+  track->label = g_strdup (labels[track_num]);
+  track->num_channels = max_chans;
+  track->flags = flags;
+  track->min_volume = 0;
+  track->max_volume = 100;
+  sunaudiotrack->track_num = track_num;
+
+  sunaudiotrack->lvol = (0 & 0xff);
+
+  return track;
+}
+
+void
+gst_sunaudiomixer_build_list (GstSunAudioElement * sunaudio)
+{
+  GstMixerTrack *track;
+
+  sunaudio->mixer_fd = open (sunaudio->mixer_dev, O_RDWR);
+
+  if (sunaudio->mixer_fd == -1) {
+    return;
+  }
+
+  sunaudio->device_name = g_strdup ("Unknown");
+
+  track = gst_sunaudiomixer_track_new (sunaudio, 0, 1, GST_MIXER_TRACK_OUTPUT);
+  sunaudio->tracklist = g_list_append (sunaudio->tracklist, track);
+  track = gst_sunaudiomixer_track_new (sunaudio, 1, 1, 0);
+  sunaudio->tracklist = g_list_append (sunaudio->tracklist, track);
+  track = gst_sunaudiomixer_track_new (sunaudio, 2, 1, 0);
+  sunaudio->tracklist = g_list_append (sunaudio->tracklist, track);
+}
+
+static const GList *
+gst_sunaudiomixer_list_tracks (GstMixer * mixer)
+{
+  return (const GList *) GST_SUNAUDIOELEMENT (mixer)->tracklist;
+}
+
+static void
+gst_sunaudiomixer_set_volume (GstMixer * mixer,
+    GstMixerTrack * track, gint * volumes)
+{
+  gint volume;
+  gchar buf[100];
+  struct audio_info audioinfo;
+  GstSunAudioElement *sunaudio = GST_SUNAUDIOELEMENT (mixer);
+  GstSunAudioMixerTrack *sunaudiotrack = GST_SUNAUDIOMIXER_TRACK (track);
+
+  g_return_if_fail (sunaudio->mixer_fd != -1);
+  volume = (volumes[0] * 255) / 100;
+
+  /* Set the volume */
+  AUDIO_INITINFO (&audioinfo);
+
+  switch (sunaudiotrack->track_num) {
+    case 0:
+      audioinfo.play.gain = volume;
+      break;
+    case 1:
+      audioinfo.record.gain = volume;
+      break;
+    case 2:
+      audioinfo.monitor_gain = volume;
+      break;
+  }
+
+
+  if (ioctl (sunaudio->mixer_fd, AUDIO_SETINFO, &audioinfo) < 0) {
+    g_warning ("Error setting volume");
+    return;
+  }
+}
+
+static void
+gst_sunaudiomixer_get_volume (GstMixer * mixer,
+    GstMixerTrack * track, gint * volumes)
+{
+  gint volume;
+  struct audio_info audioinfo;
+  GstSunAudioElement *sunaudio = GST_SUNAUDIOELEMENT (mixer);
+  GstSunAudioMixerTrack *sunaudiotrack = GST_SUNAUDIOMIXER_TRACK (track);
+
+  g_return_if_fail (sunaudio->mixer_fd != -1);
+
+  if (ioctl (sunaudio->mixer_fd, AUDIO_GETINFO, &audioinfo) < 0) {
+    g_warning ("Error setting volume device");
+    return;
+  }
+
+  switch (sunaudiotrack->track_num) {
+    case 0:
+      sunaudiotrack->lvol = volumes[0] = (audioinfo.play.gain * 100) / 255;
+      break;
+    case 1:
+      sunaudiotrack->lvol = volumes[0] = (audioinfo.record.gain * 100) / 255;
+      break;
+    case 2:
+      sunaudiotrack->lvol = volumes[0] = (audioinfo.monitor_gain * 100) / 255;
+      break;
+  }
+
+}
+
+static void
+gst_sunaudiomixer_set_mute (GstMixer * mixer,
+    GstMixerTrack * track, gboolean mute)
+{
+  struct audio_info audioinfo;
+  GstSunAudioElement *sunaudio = GST_SUNAUDIOELEMENT (mixer);
+  GstSunAudioMixerTrack *sunaudiotrack = GST_SUNAUDIOMIXER_TRACK (track);
+
+  g_return_if_fail (sunaudio->mixer_fd != -1);
+  if (sunaudiotrack->track_num != 0)
+    return;
+
+  AUDIO_INITINFO (&audioinfo);
+  ioctl (sunaudio->mixer_fd, AUDIO_GETINFO, &audioinfo);
+
+  if (mute) {
+    audioinfo.play.port = audioinfo.play.avail_ports;
+    audioinfo.output_muted = 1;
+  } else {
+    audioinfo.play.port = 0;
+    audioinfo.output_muted = 0;
+  }
+
+  if (ioctl (sunaudio->mixer_fd, AUDIO_SETINFO, &audioinfo) < 0) {
+    g_warning ("Error setting volume device");
+    return;
+  }
+}
+
+static void
+gst_sunaudiomixer_set_record (GstMixer * mixer,
+    GstMixerTrack * track, gboolean record)
+{
+
+  /* Implementation Pending */
+
+}
diff --git a/sys/sunaudio/gstsunmixer.h b/sys/sunaudio/gstsunmixer.h
new file mode 100644
index 00000000..dd3a7f7e
--- /dev/null
+++ b/sys/sunaudio/gstsunmixer.h
@@ -0,0 +1,43 @@
+#ifndef __GST_SUNAUDIO_MIXER_H
+#define __GST_SUNAUDIO_MIXER_H
+
+#include <gst/gst.h>
+#include <gst/mixer/mixer.h>
+#include "gstsunelement.h"
+                                                                                
+G_BEGIN_DECLS
+                                                                                
+#define GST_TYPE_SUNAUDIOMIXER_TRACK \
+  (gst_sunaudiomixer_track_get_type ())
+#define GST_SUNAUDIOMIXER_TRACK(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SUNAUDIOMIXER_TRACK, \
+                               GstSunAudioMixerTrack))
+#define GST_SUNAUDIOMIXER_TRACK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SUNAUDIOMIXER_TRACK, \
+                            GstSunAudioMixerTrackClass))
+#define GST_IS_SUNAUDIOMIXER_TRACK(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SUNAUDIOMIXER_TRACK))
+#define GST_IS_SUNAUDIOMIXER_TRACK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SUNAUDIOMIXER_TRACK))
+                                                                                
+typedef struct _GstSunAudioMixerTrack {
+  GstMixerTrack parent;
+                                                                                
+  gint          lvol, rvol;
+  gint          track_num;
+} GstSunAudioMixerTrack;
+                                                                                
+typedef struct _GstSunAudioMixerTrackClass {
+  GstMixerTrackClass parent;
+} GstSunAudioMixerTrackClass;
+                                                                                
+GType   gst_sunaudiomixer_track_get_type     (void);
+ 
+void    gst_sunaudiomixer_interface_init     (GstMixerClass *klass);
+void    gst_sunaudio_interface_init          (GstImplementsInterfaceClass *klass);
+void    gst_sunaudiomixer_build_list         (GstSunAudioElement *sunaudio);
+void    gst_sunaudiomixer_free_list          (GstSunAudioElement *sunaudio);
+ 
+G_END_DECLS
+
+#endif