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* #28679: audio: don't create a new scratch buffer every time we resample

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This commit is contained in:
Tristan Matthews
2013-08-20 16:45:40 -04:00
parent f388aade3f
commit 99c14e26d6
2 changed files with 6 additions and 4 deletions
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9
daemon/src/audio/samplerateconverter.cpp
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@ -32,7 +32,7 @@
#include "sfl_types.h"
SamplerateConverter::SamplerateConverter(int freq, size_t channels /* = 1 */) : floatBufferIn_(),
floatBufferOut_(), samples_(0), channels_(channels), maxFreq_(freq), src_state_(0)
floatBufferOut_(), scratchBuffer_(), samples_(0), channels_(channels), maxFreq_(freq), src_state_(0)
{
int err;
src_state_ = src_new(SRC_LINEAR, channels_, &err);
@ -41,6 +41,7 @@ SamplerateConverter::SamplerateConverter(int freq, size_t channels /* = 1 */) :
floatBufferIn_.resize(samples_);
floatBufferOut_.resize(samples_);
scratchBuffer_.resize(samples_);
}
SamplerateConverter::~SamplerateConverter()
@ -86,6 +87,7 @@ void SamplerateConverter::resample(const AudioBuffer &dataIn, AudioBuffer &dataO
samples_ = std::max(inSamples, outSamples);
floatBufferIn_.resize(inSamples);
floatBufferOut_.resize(outSamples);
scratchBuffer_.resize(outSamples);
SRC_DATA src_data;
src_data.data_in = floatBufferIn_.data();
@ -102,7 +104,6 @@ void SamplerateConverter::resample(const AudioBuffer &dataIn, AudioBuffer &dataO
/*
TODO: one-shot deinterleave and float-to-short conversion
*/
std::vector<SFLAudioSample> scratch_buff(outSamples);
src_float_to_short_array(floatBufferOut_.data(), scratch_buff.data(), outSamples);
dataOut.deinterleave(scratch_buff.data(), src_data.output_frames, nbChans);
src_float_to_short_array(floatBufferOut_.data(), scratchBuffer_.data(), outSamples);
dataOut.deinterleave(scratchBuffer_.data(), src_data.output_frames, nbChans);
}

1
daemon/src/audio/samplerateconverter.h
View File

@ -78,6 +78,7 @@ class SamplerateConverter {
/* temporary buffers */
std::vector<float> floatBufferIn_;
std::vector<float> floatBufferOut_;
std::vector<SFLAudioSample> scratchBuffer_;
size_t samples_; // size in samples of temporary buffers
size_t channels_; // number of channels configured