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, 136 insertions, 0 deletions

diff --git a/media/libeffects/lvm/lib/Common/src/LVC_Core_MixInSoft_D16C31_SAT.c b/media/libeffects/lvm/lib/Common/src/LVC_Core_MixInSoft_D16C31_SAT.c
new file mode 100755
index 0000000..0408f42
--- /dev/null
+++ b/media/libeffects/lvm/lib/Common/src/LVC_Core_MixInSoft_D16C31_SAT.c
@@ -0,0 +1,136 @@
+/*
+ * 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 "LVC_Mixer_Private.h"
+#include "LVM_Macros.h"
+
+/**********************************************************************************
+   FUNCTION LVCore_MIXSOFT_1ST_D16C31_WRA
+***********************************************************************************/
+
+void LVC_Core_MixInSoft_D16C31_SAT( LVMixer3_st *ptrInstance,
+                                    const LVM_INT16     *src,
+                                          LVM_INT16     *dst,
+                                          LVM_INT16     n)
+{
+
+    LVM_INT16   OutLoop;
+    LVM_INT16   InLoop;
+    LVM_INT16   CurrentShort;
+    LVM_INT32   ii,jj;
+    Mix_Private_st  *pInstance=(Mix_Private_st *)(ptrInstance->PrivateParams);
+    LVM_INT32   Delta=pInstance->Delta;
+    LVM_INT32   Current=pInstance->Current;
+    LVM_INT32   Target=pInstance->Target;
+    LVM_INT32   Temp;
+
+    InLoop = (LVM_INT16)(n >> 2); /* Process per 4 samples */
+    OutLoop = (LVM_INT16)(n - (InLoop << 2));
+
+    if(Current<Target){
+        if (OutLoop){
+            ADD2_SAT_32x32(Current,Delta,Temp);                                      /* Q31 + Q31 into Q31*/
+            Current=Temp;
+            if (Current > Target)
+                Current = Target;
+
+            CurrentShort = (LVM_INT16)(Current>>16);                                 /* From Q31 to Q15*/
+
+            for (ii = OutLoop; ii != 0; ii--){
+                Temp = ((LVM_INT32)*dst) + (((LVM_INT32)*(src++) * CurrentShort)>>15);      /* Q15 + Q15*Q15>>15 into Q15 */
+                if (Temp > 0x00007FFF)
+                    *dst++ = 0x7FFF;
+                else if (Temp < -0x00008000)
+                    *dst++ = - 0x8000;
+                else
+                    *dst++ = (LVM_INT16)Temp;
+            }
+        }
+
+        for (ii = InLoop; ii != 0; ii--){
+            ADD2_SAT_32x32(Current,Delta,Temp);                                      /* Q31 + Q31 into Q31*/
+            Current=Temp;
+            if (Current > Target)
+                Current = Target;
+
+            CurrentShort = (LVM_INT16)(Current>>16);                                 /* From Q31 to Q15*/
+
+            for (jj = 4; jj!=0 ; jj--){
+                Temp = ((LVM_INT32)*dst) + (((LVM_INT32)*(src++) * CurrentShort)>>15);      /* Q15 + Q15*Q15>>15 into Q15 */
+                if (Temp > 0x00007FFF)
+                    *dst++ = 0x7FFF;
+                else if (Temp < -0x00008000)
+                    *dst++ = - 0x8000;
+                else
+                    *dst++ = (LVM_INT16)Temp;
+            }
+        }
+    }
+    else{
+        if (OutLoop){
+            Current -= Delta;                                                        /* Q31 + Q31 into Q31*/
+            if (Current < Target)
+                Current = Target;
+
+            CurrentShort = (LVM_INT16)(Current>>16);                                 /* From Q31 to Q15*/
+
+            for (ii = OutLoop; ii != 0; ii--){
+                Temp = ((LVM_INT32)*dst) + (((LVM_INT32)*(src++) * CurrentShort)>>15);      /* Q15 + Q15*Q15>>15 into Q15 */
+                if (Temp > 0x00007FFF)
+                    *dst++ = 0x7FFF;
+                else if (Temp < -0x00008000)
+                    *dst++ = - 0x8000;
+                else
+                    *dst++ = (LVM_INT16)Temp;
+            }
+        }
+
+        for (ii = InLoop; ii != 0; ii--){
+            Current -= Delta;                                                        /* Q31 + Q31 into Q31*/
+            if (Current < Target)
+                Current = Target;
+
+            CurrentShort = (LVM_INT16)(Current>>16);                                 /* From Q31 to Q15*/
+
+            for (jj = 4; jj!=0 ; jj--){
+                Temp = ((LVM_INT32)*dst) + (((LVM_INT32)*(src++) * CurrentShort)>>15);      /* Q15 + Q15*Q15>>15 into Q15 */
+                if (Temp > 0x00007FFF)
+                    *dst++ = 0x7FFF;
+                else if (Temp < -0x00008000)
+                    *dst++ = - 0x8000;
+                else
+                    *dst++ = (LVM_INT16)Temp;
+            }
+        }
+    }
+    pInstance->Current=Current;
+}
+
+
+/**********************************************************************************/