First submission of audio effect library from NXP software.

This CL contains the first open sourceable version of the audio effect library from NXP software.
The effects implemented are:
- Bass boost
- Virtualizer (stereo widening)
- Equalizer
- Spectrum analyzer

Source file for the effect engines are located under libeffects/lvm/lib
The wrapper implementing the interface with the audio effect framework in under libeffects/lvm/wrapper

The code of other effect libraries has also been reorganized fo clarity:
- the effect factory is now under libeffects/factory
- the test equalizer and reverb effects are under libeffect/testlibs
- the visualizer is under libeffects/virtualizer

Change-Id: I8d91e2181f81b89f8fc0c1e1e6bf552c5809b2eb

1 files changed, 65 insertions, 0 deletions

diff --git a/media/libeffects/lvm/lib/Common/src/From2iToMS_16x16.c b/media/libeffects/lvm/lib/Common/src/From2iToMS_16x16.c
new file mode 100755
index 0000000..fb00768
--- /dev/null
+++ b/media/libeffects/lvm/lib/Common/src/From2iToMS_16x16.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2004-2010 NXP Software
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**********************************************************************************
+
+     $Author: beq07716 $
+     $Revision: 1000 $
+     $Date: 2010-06-28 13:08:20 +0200 (Mon, 28 Jun 2010) $
+
+***********************************************************************************/
+
+/**********************************************************************************
+   INCLUDE FILES
+***********************************************************************************/
+
+#include "VectorArithmetic.h"
+
+/**********************************************************************************
+   FUNCTION  From2iToMS_16x16
+***********************************************************************************/
+
+void From2iToMS_16x16( const LVM_INT16  *src,
+                             LVM_INT16  *dstM,
+                             LVM_INT16  *dstS,
+                             LVM_INT16  n )
+{
+    LVM_INT32 temp1,left,right;
+    LVM_INT16 ii;
+    for (ii = n; ii != 0; ii--)
+    {
+        left = (LVM_INT32)*src;
+        src++;
+
+        right = (LVM_INT32)*src;
+        src++;
+
+        /* Compute M signal*/
+        temp1 =  (left+right)>>1;
+        *dstM = (LVM_INT16)temp1;
+        dstM++;
+
+        /* Compute S signal*/
+        temp1 =  (left-right)>>1;
+        *dstS = (LVM_INT16)temp1;
+        dstS++;
+    }
+
+    return;
+}
+
+/**********************************************************************************/