mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-12 14:51:04 -05:00
51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
/*
|
|
* SampleCopy.h
|
|
* ------------
|
|
* Purpose: Functions for copying sample data.
|
|
* Notes : (currently none)
|
|
* Authors: OpenMPT Devs
|
|
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
|
|
*/
|
|
|
|
|
|
#pragma once
|
|
|
|
#include "openmpt/all/BuildSettings.hpp"
|
|
|
|
#include "openmpt/soundbase/SampleConvert.hpp"
|
|
#include "openmpt/soundbase/SampleDecode.hpp"
|
|
|
|
|
|
OPENMPT_NAMESPACE_BEGIN
|
|
|
|
|
|
// Copy a sample data buffer.
|
|
// targetBuffer: Buffer in which the sample should be copied into.
|
|
// numSamples: Number of samples of size T that should be copied. targetBuffer is expected to be able to hold "numSamples * incTarget" samples.
|
|
// incTarget: Number of samples by which the target data pointer is increased each time.
|
|
// sourceBuffer: Buffer from which the samples should be read.
|
|
// sourceSize: Size of source buffer, in bytes.
|
|
// incSource: Number of samples by which the source data pointer is increased each time.
|
|
//
|
|
// Template arguments:
|
|
// SampleConversion: Functor of type SampleConversionFunctor to apply sample conversion (see above for existing functors).
|
|
template <typename SampleConversion>
|
|
size_t CopySample(typename SampleConversion::output_t *MPT_RESTRICT outBuf, size_t numSamples, size_t incTarget, const typename SampleConversion::input_t *MPT_RESTRICT inBuf, size_t sourceSize, size_t incSource, SampleConversion conv = SampleConversion())
|
|
{
|
|
const size_t sampleSize = incSource * SampleConversion::input_inc * sizeof(typename SampleConversion::input_t);
|
|
LimitMax(numSamples, sourceSize / sampleSize);
|
|
const size_t copySize = numSamples * sampleSize;
|
|
|
|
SampleConversion sampleConv(conv);
|
|
while(numSamples--)
|
|
{
|
|
*outBuf = sampleConv(inBuf);
|
|
outBuf += incTarget;
|
|
inBuf += incSource * SampleConversion::input_inc;
|
|
}
|
|
|
|
return copySize;
|
|
}
|
|
|
|
|
|
OPENMPT_NAMESPACE_END
|