Some cleanups and refactoring make ossrc do good negotiation

Original commit message from CVS:
Some cleanups and refactoring
make ossrc do good negotiation

1 files changed, 91 insertions, 0 deletions

diff --git a/sys/oss/gstosscommon.c b/sys/oss/gstosscommon.c
new file mode 100644
index 00000000..cadf5a2d
--- /dev/null
+++ b/sys/oss/gstosscommon.c
@@ -0,0 +1,91 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wim.taymans@chello.be>
+ *
+ * gstosssink.c: 
+ *
+ * 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.
+ */
+
+
+#include "gstosscommon.h"
+#include <sys/soundcard.h>
+
+gboolean 
+gst_ossformat_get (gint law, gint endianness, gboolean sign, gint width, gint depth,
+		   gint *format, gint *bps) 
+{
+  if (width != depth) 
+    return FALSE;
+
+  *bps = 1;
+
+  if (law == 0) {
+    if (width == 16) {
+      if (sign == TRUE) {
+        if (endianness == G_LITTLE_ENDIAN) {
+	  *format = AFMT_S16_LE;
+	  GST_DEBUG (GST_CAT_PLUGIN_INFO, 
+	             "16 bit signed LE, no law (%d)", *format);
+	}
+        else if (endianness == G_BIG_ENDIAN) {
+	  *format = AFMT_S16_BE;
+	  GST_DEBUG (GST_CAT_PLUGIN_INFO, 
+	             "16 bit signed BE, no law (%d)", *format);
+	}
+      }
+      else {
+        if (endianness == G_LITTLE_ENDIAN) {
+	  *format = AFMT_U16_LE;
+	  GST_DEBUG (GST_CAT_PLUGIN_INFO, 
+	             "16 bit unsigned LE, no law (%d)", *format);
+	}
+        else if (endianness == G_BIG_ENDIAN) {
+	  *format = AFMT_U16_BE;
+	  GST_DEBUG (GST_CAT_PLUGIN_INFO, 
+	             "16 bit unsigned BE, no law (%d)", *format);
+	}
+      }
+      *bps = 2;
+    }
+    else if (width == 8) {
+      if (sign == TRUE) {
+	*format = AFMT_S8;
+	GST_DEBUG (GST_CAT_PLUGIN_INFO, 
+	           "8 bit signed, no law (%d)", *format);
+      }
+      else {
+        *format = AFMT_U8;
+	GST_DEBUG (GST_CAT_PLUGIN_INFO, 
+	           "8 bit unsigned, no law (%d)", *format);
+      }
+      *bps = 1;
+    }
+  } else if (law == 1) {
+    *format = AFMT_MU_LAW;
+    GST_DEBUG (GST_CAT_PLUGIN_INFO, 
+	       "mu law (%d)", *format);
+  } else if (law == 2) {
+    *format = AFMT_A_LAW;
+    GST_DEBUG (GST_CAT_PLUGIN_INFO, 
+	       "a law (%d)", *format);
+  } else {
+    g_critical ("unknown law");
+    return FALSE;
+  }
+
+  return TRUE;
+}