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, 79 insertions, 0 deletions

diff --git a/media/libeffects/lvm/lib/Common/src/LVM_GetOmega.c b/media/libeffects/lvm/lib/Common/src/LVM_GetOmega.c
new file mode 100755
index 0000000..1cc10db
--- /dev/null
+++ b/media/libeffects/lvm/lib/Common/src/LVM_GetOmega.c
@@ -0,0 +1,79 @@
+/*
+ * 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.
+ */
+
+/************************************************************************/
+/*                                                                      */
+/*     Project::                                                        */
+/*     $Author: nxp27078 $*/
+/*     $Revision: 762 $*/
+/*     $Date: 2010-06-11 14:50:33 +0200 (vr, 11 jun 2010) $*/
+/*                                                                      */
+/************************************************************************/
+
+#include "LVM_Types.h"
+#include "Filter.h"
+#include "LVM_Macros.h"
+
+/************************************************************************************/
+/*                                                                                  */
+/* Defines and Tables for 2*Pi/Fs                                                   */
+/*                                                                                  */
+/************************************************************************************/
+
+#define LVVDL_2PiBy_8000        1727108826  /* In Q41 format */
+#define LVVDL_2PiBy_11025       1253230894  /* In Q41 format */
+#define LVVDL_2PiBy_12000       1151405884  /* In Q41 format */
+
+#define LVVDL_2PiByFs_SHIFT1    12          /* Qformat shift for 8kHz, 11.025kHz and 12kHz i.e. 12=41-29 */
+#define LVVDL_2PiByFs_SHIFT2    13          /* Qformat shift for 16kHz, 22.050kHz and 24kHz i.e. 13=42-29 */
+#define LVVDL_2PiByFs_SHIFT3    14          /* Qformat shift for 32kHz, 44.1kHz and 48kHz i.e. 14=43-29 */
+
+const LVM_INT32     LVVDL_2PiOnFsTable[] =  {LVVDL_2PiBy_8000 , /* 8kHz in Q41, 16kHz in Q42, 32kHz in Q43 */
+                                            LVVDL_2PiBy_11025,  /* 11025 Hz in Q41, 22050Hz in Q42, 44100 Hz in Q43*/
+                                            LVVDL_2PiBy_12000}; /* 12kHz in Q41, 24kHz in Q42, 48kHz in Q43 */
+
+
+const LVM_INT32     LVVDL_2PiOnFsShiftTable[]={LVVDL_2PiByFs_SHIFT1 ,         /* 8kHz, 11025Hz, 12kHz */
+                                               LVVDL_2PiByFs_SHIFT2,          /* 16kHz, 22050Hz, 24kHz*/
+                                               LVVDL_2PiByFs_SHIFT3};         /* 32kHz, 44100Hz, 48kHz */
+
+/*-------------------------------------------------------------------------*/
+/* FUNCTION:                                                               */
+/*   LVM_GetOmega                                                          */
+/*                                                                         */
+/* LVM_INT32 LVM_GetOmega(LVM_UINT16                  Fc,                  */
+/*                        LVM_Fs_en                   Fs)                  */
+/*                                                                         */
+/* DESCRIPTION:                                                            */
+/*   This function calculates the value of w using Fc and Fs               */
+/*                                                                         */
+/* PARAMETERS:                                                             */
+/*                                                                         */
+/*  LVM_UINT16          Fc     The corner frequency in Hz Q16.0 format     */
+/*  LVM_Fs_en           Fs     The SampleRate                              */
+/* RETURNS:                                                                */
+/*   w=2*pi*Fc/Fs in Q2.29 format                                          */
+/*-------------------------------------------------------------------------*/
+
+LVM_INT32 LVM_GetOmega(LVM_UINT16                  Fc,
+                       LVM_Fs_en                   Fs)
+{
+    LVM_INT32   w;
+    MUL32x32INTO32((LVM_INT32)Fc,LVVDL_2PiOnFsTable[Fs%3],w,LVVDL_2PiOnFsShiftTable[Fs/3])
+    return w;
+}
+