diff options
Diffstat (limited to 'media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c')
| -rw-r--r--[-rwxr-xr-x] | media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c | 86 |
1 files changed, 74 insertions, 12 deletions
diff --git a/media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c b/media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c index 999b8bb..5d99461 100755..100644 --- a/media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c +++ b/media/libeffects/lvm/lib/StereoWidening/src/LVCS_Process.c @@ -15,14 +15,6 @@ * limitations under the License. */ -/************************************************************************************ - - $Author: beq07716 $ - $Revision: 1001 $ - $Date: 2010-06-28 13:23:02 +0200 (Mon, 28 Jun 2010) $ - -*************************************************************************************/ - /************************************************************************************/ /* */ @@ -213,10 +205,80 @@ LVCS_ReturnStatus_en LVCS_Process(LVCS_Handle_t hInstance, - (((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(NumSamples < LVCS_COMPGAINFRAME) + { + NonLinComp_D16(Gain, /* Compressor gain setting */ + pOutData, + pOutData, + (LVM_INT32)(2*NumSamples)); + } + else + { + LVM_INT16 GainStep; + LVM_INT16 FinalGain; + LVM_INT16 SampleToProcess = NumSamples; + LVM_INT16 *pOutPtr; + + /* Large changes in Gain can cause clicks in output + Split data into small blocks and use interpolated gain values */ + + GainStep = (LVM_INT16)(((Gain-pInstance->CompressGain) * LVCS_COMPGAINFRAME)/NumSamples); + + if((GainStep ==0)&&(pInstance->CompressGain < Gain)) + { + GainStep=1; + } + else + { + if((GainStep ==0)&&(pInstance->CompressGain > Gain)) + { + GainStep=-1; + } + } + + FinalGain = Gain; + Gain = pInstance->CompressGain; + pOutPtr = pOutData; + + while(SampleToProcess > 0) + { + Gain = (LVM_INT16)(Gain + GainStep); + if((GainStep > 0)&& (FinalGain <= Gain)) + { + Gain = FinalGain; + GainStep =0; + } + + if((GainStep < 0)&& (FinalGain > Gain)) + { + Gain = FinalGain; + GainStep =0; + } + + if(SampleToProcess > LVCS_COMPGAINFRAME) + { + NonLinComp_D16(Gain, /* Compressor gain setting */ + pOutPtr, + pOutPtr, + (LVM_INT32)(2*LVCS_COMPGAINFRAME)); + pOutPtr +=(2*LVCS_COMPGAINFRAME); + SampleToProcess = (LVM_INT16)(SampleToProcess-LVCS_COMPGAINFRAME); + } + else + { + NonLinComp_D16(Gain, /* Compressor gain setting */ + pOutPtr, + pOutPtr, + (LVM_INT32)(2*SampleToProcess)); + + SampleToProcess = 0; + } + + } + } + + /* Store gain value*/ + pInstance->CompressGain = Gain; } |