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, 58 insertions, 0 deletions

diff --git a/media/libeffects/lvm/lib/Common/src/Abs_32.c b/media/libeffects/lvm/lib/Common/src/Abs_32.c
new file mode 100755
index 0000000..635315d
--- /dev/null
+++ b/media/libeffects/lvm/lib/Common/src/Abs_32.c
@@ -0,0 +1,58 @@
+/*
+ * 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    "ScalarArithmetic.h"
+
+/****************************************************************************************
+ *  Name        : Abs_32()
+ *  Input       : Signed 32-bit integer
+ *  Output      :
+ *  Returns     : Absolute value
+ *  Description : Absolute value with maximum negative value corner case
+ *  Remarks     :
+ ****************************************************************************************/
+
+LVM_INT32    Abs_32(LVM_INT32    input)
+{
+    if(input <  0)
+    {
+        if (input == (LVM_INT32)(0x80000000U))
+        {
+            /* The corner case, so set to the maximum positive value */
+            input=(LVM_INT32) 0x7fffffff;
+        }
+        else
+        {
+            /* Negative input, so invert */
+            input = (LVM_INT32)(-input);
+        }
+    }
+    return input;
+}
+