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Diffstat (limited to 'media/libeffects/lvm/lib/Common/src/LVC_Mixer.h')
| -rwxr-xr-x | media/libeffects/lvm/lib/Common/src/LVC_Mixer.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/media/libeffects/lvm/lib/Common/src/LVC_Mixer.h b/media/libeffects/lvm/lib/Common/src/LVC_Mixer.h new file mode 100755 index 0000000..3b32e21 --- /dev/null +++ b/media/libeffects/lvm/lib/Common/src/LVC_Mixer.h @@ -0,0 +1,144 @@ +/* + * 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__ + |