sys/oss/gstossmixerelement.*: Added mixer element like alsamixer.

Original commit message from CVS:
2005-08-23  Andy Wingo  <wingo@pobox.com>

* sys/oss/gstossmixerelement.h:
* sys/oss/gstossmixerelement.c: Added mixer element like
alsamixer.

* sys/oss/Makefile.am:
* sys/oss/gstossaudio.c: Register the ossmixer element.

5 files changed, 166 insertions, 12 deletions

diff --git a/sys/oss/Makefile.am b/sys/oss/Makefile.am
index d4fc2394..9c797cf8 100644
--- a/sys/oss/Makefile.am
+++ b/sys/oss/Makefile.am
@@ -1,10 +1,11 @@
 plugin_LTLIBRARIES = libgstossaudio.la
 
-libgstossaudio_la_SOURCES = gstossaudio.c	\
-		            gstosshelper.c	\
-			    gstossmixer.c	\
-			    gstossmixertrack.c	\
-			    gstosssink.c	\
+libgstossaudio_la_SOURCES = gstossaudio.c	 \
+		            gstosshelper.c	 \
+			    gstossmixer.c	 \
+			    gstossmixerelement.c \
+			    gstossmixertrack.c	 \
+			    gstosssink.c	 \
 			    gstosssrc.c
 
 #		            gstossdmabuffer.c
@@ -15,11 +16,12 @@ libgstossaudio_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) \
 		-lgstaudio-@GST_MAJORMINOR@
 libgstossaudio_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) 
 
-noinst_HEADERS = gstosssink.h	  \
-		gstosssrc.h	  \
-                gstosshelper.h	  \
-		gstossdmabuffer.h \
-		gstossmixer.h     \
+noinst_HEADERS = gstosssink.h	     \
+		gstosssrc.h	     \
+                gstosshelper.h	     \
+		gstossdmabuffer.h    \
+		gstossmixer.h        \
+		gstossmixerelement.h \
 		gstossmixertrack.h
 
 # noinst_PROGRAMS = #oss_probe
diff --git a/sys/oss/gstossaudio.c b/sys/oss/gstossaudio.c
index 219a0367..500cea67 100644
--- a/sys/oss/gstossaudio.c
+++ b/sys/oss/gstossaudio.c
@@ -23,6 +23,7 @@
 
 #include "gst/gst-i18n-plugin.h"
 
+#include "gstossmixerelement.h"
 #include "gstosssink.h"
 #include "gstosssrc.h"
 
@@ -33,8 +34,8 @@ GST_DEBUG_CATEGORY (oss_debug);
 static gboolean
 plugin_init (GstPlugin * plugin)
 {
-  if (                          /*!gst_element_register (plugin, "ossmixer", GST_RANK_PRIMARY,
-                                   GST_TYPE_OSSELEMENT) || */
+  if (!gst_element_register (plugin, "ossmixer", GST_RANK_NONE,
+          GST_TYPE_OSS_MIXER_ELEMENT) ||
       !gst_element_register (plugin, "osssrc", GST_RANK_PRIMARY,
           GST_TYPE_OSS_SRC) ||
       !gst_element_register (plugin, "osssink", GST_RANK_SECONDARY,
diff --git a/sys/oss/gstossmixer.c b/sys/oss/gstossmixer.c
index 1e972568..e199414d 100644
--- a/sys/oss/gstossmixer.c
+++ b/sys/oss/gstossmixer.c
@@ -143,6 +143,7 @@ gst_ossmixer_new (const char *device, GstOssMixerDirection dir)
 
   ret->device = g_strdup (device);
   ret->dir = dir;
+  ret->mixer_fd = -1;
 
   if (!gst_ossmixer_open (ret))
     goto error;
diff --git a/sys/oss/gstossmixerelement.c b/sys/oss/gstossmixerelement.c
new file mode 100644
index 00000000..28232d66
--- /dev/null
+++ b/sys/oss/gstossmixerelement.c
@@ -0,0 +1,92 @@
+/* OSS mixer interface element.
+ * Copyright (C) 2005 Andrew Vander Wingo <wingo@pobox.com>
+ *
+ * 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 "gstossmixerelement.h"
+
+
+static GstElementDetails gst_oss_mixer_element_details =
+GST_ELEMENT_DETAILS ("OSS Mixer",
+    "Generic/Audio",
+    "Control sound input and output levels with OSS",
+    "Andrew Vander Wingo <wingo@pobox.com>");
+
+
+GST_BOILERPLATE_WITH_INTERFACE (GstOssMixerElement, gst_oss_mixer_element,
+    GstElement, GST_TYPE_ELEMENT, GstMixer, GST_TYPE_MIXER,
+    gst_oss_mixer_element);
+
+GST_IMPLEMENT_OSS_MIXER_METHODS (GstOssMixerElement, gst_oss_mixer_element);
+
+static GstElementStateReturn gst_oss_mixer_element_change_state (GstElement *
+    element);
+
+static void
+gst_oss_mixer_element_base_init (gpointer klass)
+{
+  gst_element_class_set_details (GST_ELEMENT_CLASS (klass),
+      &gst_oss_mixer_element_details);
+}
+
+static void
+gst_oss_mixer_element_class_init (GstOssMixerElementClass * klass)
+{
+  GstElementClass *element_class;
+
+  element_class = (GstElementClass *) klass;
+
+  element_class->change_state = gst_oss_mixer_element_change_state;
+}
+
+static void
+gst_oss_mixer_element_init (GstOssMixerElement * this)
+{
+  this->mixer = NULL;
+}
+
+static GstElementStateReturn
+gst_oss_mixer_element_change_state (GstElement * element)
+{
+  GstOssMixerElement *this = GST_OSS_MIXER_ELEMENT (element);
+
+  switch (GST_STATE_TRANSITION (element)) {
+    case GST_STATE_NULL_TO_READY:
+      if (!this->mixer) {
+        this->mixer = gst_ossmixer_new ("/dev/mixer", GST_OSS_MIXER_ALL);
+      }
+      break;
+    case GST_STATE_READY_TO_NULL:
+      if (this->mixer) {
+        gst_ossmixer_free (this->mixer);
+        this->mixer = NULL;
+      }
+      break;
+    default:
+      break;
+  }
+
+  if (GST_ELEMENT_CLASS (parent_class)->change_state)
+    return GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+  return GST_STATE_SUCCESS;
+}
diff --git a/sys/oss/gstossmixerelement.h b/sys/oss/gstossmixerelement.h
new file mode 100644
index 00000000..8755c515
--- /dev/null
+++ b/sys/oss/gstossmixerelement.h
@@ -0,0 +1,58 @@
+/* OSS mixer interface element.
+ * Copyright (C) 2005 Andrew Vander Wingo <wingo@pobox.com>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#ifndef __GST_OSS_MIXER_ELEMENT_H__
+#define __GST_OSS_MIXER_ELEMENT_H__
+
+
+#include "gstossmixer.h"
+
+
+G_BEGIN_DECLS
+
+
+#define GST_OSS_MIXER_ELEMENT(obj)		(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OSS_MIXER_ELEMENT,GstOssMixerElement))
+#define GST_OSS_MIXER_ELEMENT_CLASS(klass)	(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OSS_MIXER_ELEMENT,GstOssMixerElementClass))
+#define GST_IS_OSS_MIXER_ELEMENT(obj)		(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OSS_MIXER_ELEMENT))
+#define GST_IS_OSS_MIXER_ELEMENT_CLASS(obj)	(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OSS_MIXER_ELEMENT))
+#define GST_TYPE_OSS_MIXER_ELEMENT		(gst_oss_mixer_element_get_type())
+
+
+typedef struct _GstOssMixerElement GstOssMixerElement;
+typedef struct _GstOssMixerElementClass GstOssMixerElementClass;
+
+
+struct _GstOssMixerElement {
+  GstElement		parent;
+
+  GstOssMixer		*mixer;
+};
+
+struct _GstOssMixerElementClass {
+  GstElementClass	parent;
+};
+
+
+GType		gst_oss_mixer_element_get_type		(void);
+
+
+G_END_DECLS
+
+
+#endif /* __GST_OSS_MIXER_ELEMENT_H__ */