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Microphone

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Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>
This commit is contained in:
Esteban Papp
2021-07-12 20:01:53 -07:00
parent 33a19b05bc
commit f91c4a3104
10 changed files with 38 additions and 41 deletions
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Gems/Microphone/Code/Source/SimpleDownsample.cpp
+9 -11
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@@ -5,19 +5,17 @@
*
*/
#include "Microphone_precompiled.h"
#include "SimpleDownsample.h"
#include <cmath>
AZStd::size_t GetDownsampleSize(AZStd::size_t sourceSize, AZ::u32 sourceSampleRate, AZ::u32 targetSampleRate)
size_t GetDownsampleSize(size_t sourceSize, AZ::u32 sourceSampleRate, AZ::u32 targetSampleRate)
{
return (AZStd::size_t)round((float)sourceSize / ((float)sourceSampleRate / (float)targetSampleRate));
return (size_t)round((float)sourceSize / ((float)sourceSampleRate / (float)targetSampleRate));
}
void Downsample(AZ::s16* inBuffer, AZStd::size_t inBufferSize, AZ::u32 inBufferSampleRate,
AZ::s16* outBuffer, AZStd::size_t outBufferSize, AZ::u32 outBufferSampleRate)
void Downsample(AZ::s16* inBuffer, size_t inBufferSize, AZ::u32 inBufferSampleRate,
AZ::s16* outBuffer, size_t outBufferSize, AZ::u32 outBufferSampleRate)
{
if(inBufferSampleRate == outBufferSampleRate)
{
@@ -31,14 +29,14 @@ void Downsample(AZ::s16* inBuffer, AZStd::size_t inBufferSize, AZ::u32 inBufferS
}
float sampleRateRatio = (float)inBufferSampleRate / (float)outBufferSampleRate;
AZStd::size_t offsetResult = 0;
AZStd::size_t offsetBuffer = 0;
size_t offsetResult = 0;
size_t offsetBuffer = 0;
while(offsetResult < outBufferSize)
{
AZStd::size_t nextOffsetBuffer = static_cast<AZStd::size_t>(round((float)(offsetResult + 1) * sampleRateRatio));
size_t nextOffsetBuffer = static_cast<size_t>(round((float)(offsetResult + 1) * sampleRateRatio));
AZ::s32 accum = 0; // this must be int 32 so it doesn't overflow with multiple int 16's possibly at max
AZStd::size_t count = 0;
for(AZStd::size_t i = offsetBuffer; i < nextOffsetBuffer && i < inBufferSize; ++i)
size_t count = 0;
for(size_t i = offsetBuffer; i < nextOffsetBuffer && i < inBufferSize; ++i)
{
accum += inBuffer[i];
count++;