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Diffstat (limited to 'media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c')
| -rwxr-xr-x | media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c b/media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c new file mode 100755 index 0000000..999b8bb --- /dev/null +++ b/media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c @@ -0,0 +1,271 @@ +/* + * 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: 1001 $ + $Date: 2010-06-28 13:23:02 +0200 (Mon, 28 Jun 2010) $ + +*************************************************************************************/ + + +/************************************************************************************/ +/* */ +/* Includes */ +/* */ +/************************************************************************************/ + +#include "LVCS.h" +#include "LVCS_Private.h" +#include "VectorArithmetic.h" +#include "CompLim.h" + +/************************************************************************************/ +/* */ +/* FUNCTION: LVCS_Process_CS */ +/* */ +/* DESCRIPTION: */ +/* Process function for the Concert Sound module based on the following block */ +/* diagram: */ +/* _________ ________ _____ _______ ___ ______ */ +/* | | | | | | | | | | | | */ +/* ----->| Stereo |->| Reverb |->| Equ |->| Alpha |-->| + |-| Gain |----> */ +/* | | Enhance | |________| |_____| |_______| |___| |______| */ +/* | |_________| | */ +/* | ___________ | */ +/* | | | | */ +/* |------------------------------->| 1 - Alpha |-----| */ +/* |___________| */ +/* */ +/* The Stereo Enhancer, Reverb and Equaliser blocks are each configured to have */ +/* their gain to give a near peak to peak output (-0.1dBFS) with a worst case */ +/* input signal. The gains of these blocks are re-combined in the Alpha mixer and */ +/* the gain block folloing the sum. */ +/* */ +/* The processing uses the output buffer for data storage after each processing */ +/* block. When processing is inplace a copy of the input signal is made in scratch */ +/* memory for the 1-Alpha path. */ +/* */ +/* */ +/* PARAMETERS: */ +/* hInstance Instance handle */ +/* pInData Pointer to the input data */ +/* pOutData Pointer to the output data */ +/* NumSamples Number of samples in the input buffer */ +/* */ +/* RETURNS: */ +/* LVCS_Success Succeeded */ +/* */ +/* NOTES: */ +/* */ +/************************************************************************************/ + +LVCS_ReturnStatus_en LVCS_Process_CS(LVCS_Handle_t hInstance, + const LVM_INT16 *pInData, + LVM_INT16 *pOutData, + LVM_UINT16 NumSamples) +{ + const LVM_INT16 *pInput; + LVCS_Instance_t *pInstance = (LVCS_Instance_t *)hInstance; + LVM_INT16 *pScratch = (LVM_INT16 *)pInstance->MemoryTable.Region[LVCS_MEMREGION_TEMPORARY_FAST].pBaseAddress; + LVCS_ReturnStatus_en err; + + /* + * Check if the processing is inplace + */ + if (pInData == pOutData) + { + /* Processing inplace */ + pInput = pScratch + (2*NumSamples); + Copy_16((LVM_INT16 *)pInData, /* Source */ + (LVM_INT16 *)pInput, /* Destination */ + (LVM_INT16)(2*NumSamples)); /* Left and right */ + } + else + { + /* Processing outplace */ + pInput = pInData; + } + + /* + * Call the stereo enhancer + */ + err=LVCS_StereoEnhancer(hInstance, /* Instance handle */ + pInData, /* Pointer to the input data */ + pOutData, /* Pointer to the output data */ + NumSamples); /* Number of samples to process */ + + /* + * Call the reverb generator + */ + err=LVCS_ReverbGenerator(hInstance, /* Instance handle */ + pOutData, /* Pointer to the input data */ + pOutData, /* Pointer to the output data */ + NumSamples); /* Number of samples to process */ + + /* + * Call the equaliser + */ + err=LVCS_Equaliser(hInstance, /* Instance handle */ + pOutData, /* Pointer to the input data */ + NumSamples); /* Number of samples to process */ + + /* + * Call the bypass mixer + */ + err=LVCS_BypassMixer(hInstance, /* Instance handle */ + pOutData, /* Pointer to the processed data */ + pInput, /* Pointer to the input (unprocessed) data */ + pOutData, /* Pointer to the output data */ + NumSamples); /* Number of samples to process */ + + if(err !=LVCS_SUCCESS) + { + return err; + } + + return(LVCS_SUCCESS); +} + +/************************************************************************************/ +/* */ +/* FUNCTION: LVCS_Process */ +/* */ +/* DESCRIPTION: */ +/* Process function for the Concert Sound module. The implementation supports two */ +/* variants of the algorithm, one for headphones and one for mobile speakers. */ +/* */ +/* Data can be processed in two formats, stereo or mono-in-stereo. Data in mono */ +/* format is not supported, the calling routine must convert the mono stream to */ +/* mono-in-stereo. */ +/* */ +/* */ +/* PARAMETERS: */ +/* hInstance Instance handle */ +/* pInData Pointer to the input data */ +/* pOutData Pointer to the output data */ +/* NumSamples Number of samples in the input buffer */ +/* */ +/* RETURNS: */ +/* LVCS_Success Succeeded */ +/* LVCS_TooManySamples NumSamples was larger than the maximum block size */ +/* */ +/* NOTES: */ +/* */ +/************************************************************************************/ + +LVCS_ReturnStatus_en LVCS_Process(LVCS_Handle_t hInstance, + const LVM_INT16 *pInData, + LVM_INT16 *pOutData, + LVM_UINT16 NumSamples) +{ + + LVCS_Instance_t *pInstance =(LVCS_Instance_t *)hInstance; + LVCS_ReturnStatus_en err; + + /* + * Check the number of samples is not too large + */ + if (NumSamples > pInstance->Capabilities.MaxBlockSize) + { + return(LVCS_TOOMANYSAMPLES); + } + + /* + * Check if the algorithm is enabled + */ + if (pInstance->Params.OperatingMode != LVCS_OFF) + { + /* + * Call CS process function + */ + err=LVCS_Process_CS(hInstance, + pInData, + pOutData, + NumSamples); + + /* + * Compress to reduce expansion effect of Concert Sound and correct volume + * differences for difference settings. Not applied in test modes + */ + if ((pInstance->Params.OperatingMode == LVCS_ON)&&(pInstance->Params.CompressorMode == LVM_MODE_ON)) + { + LVM_INT16 Gain = pInstance->VolCorrect.CompMin; + LVM_INT32 Current1; + + Current1 = LVC_Mixer_GetCurrent(&pInstance->BypassMix.Mixer_Instance.MixerStream[0]); + Gain = (LVM_INT16)( pInstance->VolCorrect.CompMin + - (((LVM_INT32)pInstance->VolCorrect.CompMin * (Current1)) >> 15) + + (((LVM_INT32)pInstance->VolCorrect.CompFull * (Current1)) >> 15) ); + + NonLinComp_D16(Gain, /* Compressor gain setting */ + pOutData, + pOutData, + (LVM_INT32)(2*NumSamples)); + } + + + if(pInstance->bInOperatingModeTransition == LVM_TRUE){ + + /* + * Re-init bypass mix when timer has completed + */ + if ((pInstance->bTimerDone == LVM_TRUE) && + (pInstance->BypassMix.Mixer_Instance.MixerStream[1].CallbackSet == 0)) + { + err=LVCS_BypassMixInit(hInstance, + &pInstance->Params); + + if(err != LVCS_SUCCESS) + { + return err; + } + + } + else{ + LVM_Timer ( &pInstance->TimerInstance, + (LVM_INT16)NumSamples); + } + } + } + else + { + if (pInData != pOutData) + { + /* + * The algorithm is disabled so just copy the data + */ + Copy_16((LVM_INT16 *)pInData, /* Source */ + (LVM_INT16 *)pOutData, /* Destination */ + (LVM_INT16)(2*NumSamples)); /* Left and right */ + } + } + + + return(LVCS_SUCCESS); +} + + + + + + + + + + |