sukibaby
9e3c7fc207
1) Set a buffer of 2MB instead of setting the buffer to nullptr and depend on it being grown by assets being loaded at the game launch 2) Update some C style code to C++ style 3) Improve Extend feature to support handling a larger number of samples, and error handling in case of a memory allocation failure
127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
#include "global.h"
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#include "RageSoundMixBuffer.h"
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#include "RageUtil.h"
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#include <cmath>
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#include <cstdint>
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#include <cstdlib>
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RageSoundMixBuffer::RageSoundMixBuffer()
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{
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// See how many samples we can stuff into 2MB.
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size_t BUF_SIZE = 2 * 1024 * 1024 / sizeof(float);
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m_pMixbuf = static_cast<float*>(std::malloc(BUF_SIZE * sizeof(float)));
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if (m_pMixbuf == nullptr) {
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ASSERT_M(false, "Failed to allocate memory for the sound mixing buffer");
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}
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m_iBufSize = BUF_SIZE;
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std::memset(m_pMixbuf, 0, m_iBufSize * sizeof(float));
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m_iBufUsed = 0;
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m_iOffset = 0;
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}
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RageSoundMixBuffer::~RageSoundMixBuffer()
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{
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std::free(m_pMixbuf);
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}
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/* write() will start mixing iOffset samples into the buffer. Be careful; this is
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* measured in samples, not frames, so if the data is stereo, multiply by two. */
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void RageSoundMixBuffer::SetWriteOffset( int iOffset )
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{
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m_iOffset = iOffset;
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}
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void RageSoundMixBuffer::Extend(unsigned iSamples)
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{
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const std::uint64_t realsize = static_cast<std::uint64_t>(iSamples) + static_cast<std::uint64_t>(m_iOffset);
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if( m_iBufSize < realsize )
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{
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m_pMixbuf = static_cast<float*>(std::realloc(m_pMixbuf, sizeof(float) * realsize));
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if (m_pMixbuf == nullptr)
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{
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ASSERT_M(false, "Failed to re-allocate memory for the sound mixing buffer.");
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}
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m_iBufSize = realsize;
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}
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if( m_iBufUsed < realsize )
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{
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std::memset(m_pMixbuf + m_iBufUsed, 0, (realsize - m_iBufUsed) * sizeof(float));
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m_iBufUsed = realsize;
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}
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}
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void RageSoundMixBuffer::write( const float *pBuf, unsigned iSize, int iSourceStride, int iDestStride )
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{
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if( iSize == 0 )
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return;
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// iSize = 3, iDestStride = 2 uses 4 frames. Don't allocate the stride of the last sample.
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Extend( iSize * iDestStride - (iDestStride-1) );
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// Scale volume and add.
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float *pDestBuf = m_pMixbuf+m_iOffset;
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while( iSize )
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{
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*pDestBuf += *pBuf;
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pBuf += iSourceStride;
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pDestBuf += iDestStride;
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--iSize;
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}
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}
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void RageSoundMixBuffer::read( std::int16_t *pBuf )
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{
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for( unsigned iPos = 0; iPos < m_iBufUsed; ++iPos )
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{
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float iOut = m_pMixbuf[iPos];
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iOut = clamp( iOut, -1.0f, +1.0f );
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pBuf[iPos] = static_cast<int>((iOut * 32767) + 0.5);
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}
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m_iBufUsed = 0;
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}
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void RageSoundMixBuffer::read( float *pBuf )
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{
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std::memcpy( pBuf, m_pMixbuf, m_iBufUsed * sizeof(float) );
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m_iBufUsed = 0;
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}
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void RageSoundMixBuffer::read_deinterlace( float **pBufs, int channels )
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{
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for( unsigned i = 0; i < m_iBufUsed / channels; ++i )
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for( int ch = 0; ch < channels; ++ch )
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pBufs[ch][i] = m_pMixbuf[channels * i + ch];
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m_iBufUsed = 0;
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}
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/*
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* Copyright (c) 2002-2004 Glenn Maynard
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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