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implemented optimization for NonAdaptingProcess processor: avoid copying of input/output from temp user buffer to host buffer by providing host buffer pointer directly to user, e.g. achieving processing of host buffer in place

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dmitrykos 2010-06-28 21:35:04 +00:00
commit 4b4a9b5b79
1 changed files with 25 additions and 2 deletions
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27
src/common/pa_process.c
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@ -750,6 +750,17 @@ static unsigned long NonAdaptingProcess( PaUtilBufferProcessor *bp,
destSampleStrideSamples = bp->inputChannelCount;
destChannelStrideBytes = bp->bytesPerUserInputSample;
userInput = bp->tempInputBuffer;
/* determine if processing of host buffer can be done directly by callback */
if( bp->inputConverter == paConverters.Copy_8_To_8 ||
bp->inputConverter == paConverters.Copy_16_To_16 ||
bp->inputConverter == paConverters.Copy_24_To_24 ||
bp->inputConverter == paConverters.Copy_32_To_32 )
{
/* process host buffer directly */
userInput = hostInputChannels[0].data;
destBytePtr = (unsigned char *)hostInputChannels[0].data;
}
}
else /* user input is not interleaved */
{
@ -778,6 +789,7 @@ static unsigned long NonAdaptingProcess( PaUtilBufferProcessor *bp,
}
}
else
if( userInput != hostInputChannels[0].data )
{
for( i=0; i<bp->inputChannelCount; ++i )
{
@ -805,7 +817,17 @@ static unsigned long NonAdaptingProcess( PaUtilBufferProcessor *bp,
{
if( bp->userOutputIsInterleaved )
{
userOutput = bp->tempOutputBuffer;
userOutput = bp->tempOutputBuffer;
/* determine if processing of host buffer can be done directly by callback */
if( bp->outputConverter == paConverters.Copy_8_To_8 ||
bp->outputConverter == paConverters.Copy_16_To_16 ||
bp->outputConverter == paConverters.Copy_24_To_24 ||
bp->outputConverter == paConverters.Copy_32_To_32 )
{
/* process host buffer directly */
userOutput = hostOutputChannels[0].data;
}
}
else /* user output is not interleaved */
{
@ -834,7 +856,8 @@ static unsigned long NonAdaptingProcess( PaUtilBufferProcessor *bp,
/* convert output data (user -> host) */
if( bp->outputChannelCount != 0 && bp->hostOutputChannels[0][0].data )
if( bp->outputChannelCount != 0 && bp->hostOutputChannels[0][0].data &&
userOutput != hostOutputChannels[0].data )
{
/*
could use more elaborate logic here and sometimes process