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/*
* 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) $
***********************************************************************************/
#ifndef __LVC_MIXER_H__
#define __LVC_MIXER_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include "LVM_Types.h"
/**********************************************************************************
INSTANCE MEMORY TYPE DEFINITION
***********************************************************************************/
/* LVMixer3_st structure stores Instance parameters for one audio stream */
typedef struct
{
LVM_INT32 PrivateParams[4]; /* Private Instance params for Audio Stream */
LVM_INT16 CallbackSet; /* Boolean. Should be set by calling application each time the target value is updated */
LVM_INT16 CallbackParam; /* Parameter that will be used in the calback function */
void *pCallbackHandle; /* Pointer to the instance of the callback function */
void *pGeneralPurpose; /* Pointer for general purpose usage */
LVM_Callback pCallBack; /* Pointer to the callback function */
} LVMixer3_st;
typedef struct
{
LVMixer3_st MixerStream[1]; /* Instance Params for one Audio Stream */
} LVMixer3_1St_st;
typedef struct
{
LVMixer3_st MixerStream[2]; /* Instance Params for two Audio Streams */
} LVMixer3_2St_st;
typedef struct
{
LVMixer3_st MixerStream[3]; /* Instance Params for three Audio Streams */
} LVMixer3_3St_st;
/**********************************************************************************
FUNCTION PROTOTYPES (HIGH LEVEL FUNCTIONS)
***********************************************************************************/
/* Function names should be unique within first 16 characters */
#define LVMixer3_MixSoft_1St_D16C31_SAT LVMixer3_1St_D16C31_SAT_MixSoft
#define LVMixer3_MixInSoft_D16C31_SAT LVMixer3_D16C31_SAT_MixInSoft
#define LVMixer3_MixSoft_2St_D16C31_SAT LVMixer3_2St_D16C31_SAT_MixSoft
#define LVMixer3_MixSoft_3St_D16C31_SAT LVMixer3_3St_D16C31_SAT_MixSoft
/*** General functions ************************************************************/
/**********************************************************************************/
/* This time constant calculation function assumes the mixer will be called with */
/* large block sizes. When the block size is small, especially if less than 4, */
/* then the calculation will give an incorrect value for alpha, see the mixer */
/* documentation for further details. */
/* ********************************************************************************/
void LVC_Mixer_SetTarget( LVMixer3_st *pStream,
LVM_INT32 TargetGain);
LVM_INT32 LVC_Mixer_GetTarget( LVMixer3_st *pStream);
LVM_INT32 LVC_Mixer_GetCurrent( LVMixer3_st *pStream);
void LVC_Mixer_Init( LVMixer3_st *pStream,
LVM_INT32 TargetGain,
LVM_INT32 CurrentGain);
void LVC_Mixer_SetTimeConstant( LVMixer3_st *pStream,
LVM_INT32 Tc_millisec,
LVM_Fs_en Fs,
LVM_INT16 NumChannels);
void LVC_Mixer_VarSlope_SetTimeConstant( LVMixer3_st *pStream,
LVM_INT32 Tc_millisec,
LVM_Fs_en Fs,
LVM_INT16 NumChannels);
/*** 16 bit functions *************************************************************/
void LVC_MixSoft_1St_D16C31_SAT( LVMixer3_1St_st *pInstance,
const LVM_INT16 *src,
LVM_INT16 *dst,
LVM_INT16 n);
void LVC_MixInSoft_D16C31_SAT( LVMixer3_1St_st *pInstance,
LVM_INT16 *src,
LVM_INT16 *dst,
LVM_INT16 n);
void LVC_MixSoft_2St_D16C31_SAT( LVMixer3_2St_st *pInstance,
const LVM_INT16 *src1,
LVM_INT16 *src2,
LVM_INT16 *dst, /* dst cannot be equal to src2 */
LVM_INT16 n);
/**********************************************************************************/
/* For applying different gains to Left and right chennals */
/* MixerStream[0] applies to Left channel */
/* MixerStream[1] applies to Right channel */
/* Gain values should not be more that 1.0 */
/**********************************************************************************/
void LVC_MixSoft_1St_2i_D16C31_SAT( LVMixer3_2St_st *pInstance,
const LVM_INT16 *src,
LVM_INT16 *dst, /* dst can be equal to src */
LVM_INT16 n); /* Number of stereo samples */
#ifdef __cplusplus
}
#endif /* __cplusplus */
/**********************************************************************************/
#endif //#ifndef __LVC_MIXER_H__
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