mirror of
https://github.com/CookiePLMonster/SilentPatch.git
synced 2024-11-25 06:42:29 +01:00
refactored WAV decoder
This commit is contained in:
Silent
parent
1b4859ac25
commit
0a439cc963
@ -6,12 +6,6 @@ bool CAEDataStream::m_bUseNewStruct;
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static void* CAEDataStream__Initialise = AddressByVersion<void*>(0x4DC2B0, 0x4DC7A0, 0x4E7550);
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WRAPPER bool CAEDataStream::Initialise() { VARJMP(CAEDataStream__Initialise); }
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unsigned int CAEStreamingDecoder::nMallocRefCount = 0;
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void* pMalloc = nullptr;
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unsigned int nBlockSize = 0;
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unsigned int nLastMallocSize = 0;
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DWORD CAEDataStreamOld::Seek(LONG nToSeek, DWORD nPoint)
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{
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LARGE_INTEGER filePosition;
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@ -78,12 +72,4 @@ CAEStreamingDecoder::~CAEStreamingDecoder()
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delete reinterpret_cast<CAEDataStreamNew*>(pStream);
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else
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delete reinterpret_cast<CAEDataStreamOld*>(pStream);
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if ( --nMallocRefCount == 0 )
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{
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operator delete(pMalloc);
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pMalloc = nullptr;
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nLastMallocSize = 0;
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}
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}
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@ -223,14 +223,10 @@ class CAEStreamingDecoder
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private:
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CAEDataStream* pStream;
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static unsigned int nMallocRefCount;
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public:
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CAEStreamingDecoder(CAEDataStream* stream)
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: pStream(stream)
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{
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++nMallocRefCount;
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if ( stream != nullptr )
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stream->Initialise();
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}
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@ -1,27 +1,23 @@
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#include "StdAfxSA.h"
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#include "WaveDecoderSA.h"
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extern void* pMalloc;
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extern unsigned int nBlockSize;
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extern unsigned int nLastMallocSize;
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bool CAEWaveDecoder::Initialise()
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{
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auto* pTheStream = GetStream();
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CAEDataStream* pTheStream = GetStream();
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struct {
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char sectionID[4];
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unsigned int sectionSize;
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uint32_t sectionSize;
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} chunkHeader;
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// Find fmt section
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pTheStream->Seek(12, FILE_BEGIN);
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pTheStream->FillBuffer(&chunkHeader, sizeof(chunkHeader));
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nOffsetToData = 12 + sizeof(chunkHeader);
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m_offsetToData = 12 + sizeof(chunkHeader);
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while ( chunkHeader.sectionID[0] != 'f' || chunkHeader.sectionID[1] != 'm' || chunkHeader.sectionID[2] != 't' || chunkHeader.sectionID[3] != ' ' )
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{
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nOffsetToData += sizeof(chunkHeader) + chunkHeader.sectionSize;
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m_offsetToData += sizeof(chunkHeader) + chunkHeader.sectionSize;
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pTheStream->Seek(chunkHeader.sectionSize, FILE_CURRENT);
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pTheStream->FillBuffer(&chunkHeader, sizeof(chunkHeader));
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@ -29,171 +25,118 @@ bool CAEWaveDecoder::Initialise()
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}
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// Read fmt header
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pTheStream->FillBuffer(&formatChunk, sizeof(FormatChunk));
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nOffsetToData += sizeof(FormatChunk);
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pTheStream->FillBuffer(&m_formatChunk, sizeof(m_formatChunk));
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m_offsetToData += sizeof(m_formatChunk);
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// Now skip through the rest of a chunk
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if ( chunkHeader.sectionSize - sizeof(FormatChunk) > 0 )
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if ( chunkHeader.sectionSize - sizeof(m_formatChunk) > 0 )
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{
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nOffsetToData += chunkHeader.sectionSize - sizeof(FormatChunk);
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pTheStream->Seek(chunkHeader.sectionSize - sizeof(FormatChunk), FILE_CURRENT);
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m_offsetToData += chunkHeader.sectionSize - sizeof(m_formatChunk);
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pTheStream->Seek(chunkHeader.sectionSize - sizeof(m_formatChunk), FILE_CURRENT);
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}
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// Find data chunk
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nOffsetToData += sizeof(chunkHeader);
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m_offsetToData += sizeof(chunkHeader);
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pTheStream->FillBuffer(&chunkHeader, sizeof(chunkHeader));
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while ( chunkHeader.sectionID[0] != 'd' || chunkHeader.sectionID[1] != 'a' || chunkHeader.sectionID[2] != 't' || chunkHeader.sectionID[3] != 'a' )
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{
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nOffsetToData += sizeof(chunkHeader) + chunkHeader.sectionSize;
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m_offsetToData += sizeof(chunkHeader) + chunkHeader.sectionSize;
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pTheStream->Seek(chunkHeader.sectionSize, FILE_CURRENT);
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pTheStream->FillBuffer(&chunkHeader, sizeof(chunkHeader));
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}
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nDataSize = chunkHeader.sectionSize;
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m_dataSize = chunkHeader.sectionSize;
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return formatChunk.sampleRate <= 48000 && formatChunk.numChannels <= 2 && (formatChunk.bitsPerSample == 8 || formatChunk.bitsPerSample == 16 || formatChunk.bitsPerSample == 24);
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return m_formatChunk.sampleRate <= 48000 && m_formatChunk.numChannels <= 2 && (m_formatChunk.bitsPerSample == 8 || m_formatChunk.bitsPerSample == 16 || m_formatChunk.bitsPerSample == 24);
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}
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uint32_t CAEWaveDecoder::FillBuffer(void* pBuf, uint32_t nLen)
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{
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if ( formatChunk.bitsPerSample == 8 )
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size_t curBlockSize = CalcBufferSize( nLen );
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if ( curBlockSize > m_maxBlockSize )
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{
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if ( formatChunk.numChannels == 2 )
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delete[] m_buffer;
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m_buffer = new uint8_t[curBlockSize];
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m_maxBlockSize = curBlockSize;
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}
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else if ( curBlockSize == 0 )
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{
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return GetStream()->FillBuffer( pBuf, nLen );
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}
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uint32_t bytesRead = GetStream()->FillBuffer( m_buffer, curBlockSize );
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size_t samplesRead = bytesRead / m_formatChunk.blockAlign;
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if ( m_formatChunk.bitsPerSample == 16 )
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{
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assert( m_formatChunk.numChannels == 1 );
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if ( m_formatChunk.numChannels == 1 )
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{
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// Stereo
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if ( nLen / 2 > nLastMallocSize )
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int16_t* inputBuf = (int16_t*)m_buffer;
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int16_t* outputBuf = (int16_t*)pBuf;
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for ( size_t i = 0; i < samplesRead; ++i )
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{
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if ( pMalloc )
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operator delete(pMalloc);
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nLastMallocSize = nLen / 2;
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pMalloc = operator new(nLastMallocSize);
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*outputBuf = *(outputBuf+1) = *inputBuf++;
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outputBuf += 2;
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}
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unsigned int nBytesWritten = GetStream()->FillBuffer(pMalloc, nLen / 2);
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signed short* pOutBuf = static_cast<signed short*>(pBuf);
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unsigned char* pInBuf = static_cast<unsigned char*>(pMalloc);
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// Convert to 16-bit
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for ( unsigned int i = 0; i < nBytesWritten; i++ )
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}
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}
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else if ( m_formatChunk.bitsPerSample == 8 )
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{
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if ( m_formatChunk.numChannels == 2 )
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{
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uint8_t* inputBuf = (uint8_t*)m_buffer;
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int16_t* outputBuf = (int16_t*)pBuf;
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for ( size_t i = 0; i < samplesRead; ++i )
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{
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pOutBuf[i] = (static_cast<signed char>(pInBuf[i]) - 128) << 8;
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*outputBuf++ = (static_cast<signed char>(*inputBuf++) - 128) << 8;
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*outputBuf++ = (static_cast<signed char>(*inputBuf++) - 128) << 8;
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}
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return nBytesWritten * 2;
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}
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else
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{
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// Mono
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if ( nLen / 4 > nLastMallocSize )
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uint8_t* inputBuf = (uint8_t*)m_buffer;
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int16_t* outputBuf = (int16_t*)pBuf;
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for ( size_t i = 0; i < samplesRead; ++i )
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{
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if ( pMalloc )
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operator delete(pMalloc);
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nLastMallocSize = nLen / 4;
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pMalloc = operator new(nLastMallocSize);
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*outputBuf = *(outputBuf+1) = (static_cast<signed char>(*inputBuf++) - 128) << 8;
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outputBuf += 2;
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}
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unsigned int nBytesWritten = GetStream()->FillBuffer(pMalloc, nLen / 4);
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signed short* pOutBuf = static_cast<signed short*>(pBuf);
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unsigned char* pInBuf = static_cast<unsigned char*>(pMalloc);
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// Convert to 16-bit
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for ( unsigned int i = 0; i < nBytesWritten; i++ )
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{
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pOutBuf[i * 2] = pOutBuf[i * 2 + 1] = (static_cast<signed char>(pInBuf[i]) - 128) << 8;
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}
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return nBytesWritten * 4;
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}
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}
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else if ( formatChunk.bitsPerSample == 24 )
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else if ( m_formatChunk.bitsPerSample == 24 )
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{
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if ( formatChunk.numChannels == 2 )
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if ( m_formatChunk.numChannels == 2 )
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{
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// Stereo
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if ( nLen * 3 / 2 > nLastMallocSize )
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uint8_t* inputBuf = (uint8_t*)m_buffer;
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int16_t* outputBuf = (int16_t*)pBuf;
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for ( size_t i = 0; i < samplesRead; ++i )
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{
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if ( pMalloc )
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operator delete(pMalloc);
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nLastMallocSize = nLen * 3 / 2;
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pMalloc = operator new(nLastMallocSize);
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*outputBuf++ = *(inputBuf+1) | (*(inputBuf+2) << 8); inputBuf += 3;
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*outputBuf++ = *(inputBuf+1) | (*(inputBuf+2) << 8); inputBuf += 3;
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}
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unsigned int nBytesWritten = GetStream()->FillBuffer(pMalloc, nLen * 3 / 2);
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unsigned char* pOutBuf = static_cast<unsigned char*>(pBuf);
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unsigned char* pInBuf = static_cast<unsigned char*>(pMalloc);
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const unsigned int nNumSamples = nBytesWritten / 3;
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// Convert to 16-bit
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for ( unsigned int i = 0; i < nNumSamples; i++ )
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{
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pOutBuf[i*2] = pInBuf[i*3 + 1];
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pOutBuf[i*2 + 1] = pInBuf[i*3 + 2];
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}
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return nNumSamples * 2;
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}
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else
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{
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if ( nLen * 3 / 4 > nLastMallocSize )
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uint8_t* inputBuf = (uint8_t*)m_buffer;
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int16_t* outputBuf = (int16_t*)pBuf;
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for ( size_t i = 0; i < samplesRead; ++i )
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{
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if ( pMalloc )
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operator delete(pMalloc);
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nLastMallocSize = nLen * 3 / 4;
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pMalloc = operator new(nLastMallocSize);
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*outputBuf = *(outputBuf+1) = *(inputBuf+1) | (*(inputBuf+2) << 8); inputBuf += 3;
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outputBuf += 2;
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}
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unsigned int nBytesWritten = GetStream()->FillBuffer(pMalloc, nLen * 3 / 4);
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unsigned char* pOutBuf = static_cast<unsigned char*>(pBuf);
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unsigned char* pInBuf = static_cast<unsigned char*>(pMalloc);
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const unsigned int nNumSamples = nBytesWritten / 3;
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// Convert to 16-bit
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for ( unsigned int i = 0; i < nNumSamples; i++ )
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{
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pOutBuf[i*4] = pOutBuf[i*4 + 2] = pInBuf[i*3 + 1];
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pOutBuf[i*4 + 1] = pOutBuf[i*4 + 3] = pInBuf[i*3 + 2];
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}
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return nNumSamples * 4;
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}
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}
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else
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{
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// 16-bit
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if ( formatChunk.numChannels == 2 )
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{
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// Stereo, optimised fetch
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return GetStream()->FillBuffer(pBuf, nLen);
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}
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else
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{
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// Mono
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if ( nLen / 2 > nLastMallocSize )
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{
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if ( pMalloc )
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operator delete(pMalloc);
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nLastMallocSize = nLen / 2;
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pMalloc = operator new(nLastMallocSize);
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}
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return samplesRead * (2*sizeof(int16_t));
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}
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unsigned int nBytesWritten = GetStream()->FillBuffer(pMalloc, nLen / 2);
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signed short* pOutBuf = static_cast<signed short*>(pBuf);
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signed short* pInBuf = static_cast<signed short*>(pMalloc);
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const unsigned int nNumSamples = nBytesWritten / 2;
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for ( unsigned int i = 0; i < nNumSamples; i++ )
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{
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pOutBuf[i*2] = pOutBuf[i*2 + 1] = pInBuf[i];
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}
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return nBytesWritten * 2;
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}
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}
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size_t CAEWaveDecoder::CalcBufferSize( uint32_t outputBuf )
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{
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uint32_t requestedSamples = outputBuf / (2*sizeof(int16_t));
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size_t requiredSize = m_formatChunk.blockAlign * requestedSamples;
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return requiredSize == outputBuf ? 0 : requiredSize;
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}
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@ -5,42 +5,51 @@
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class CAEWaveDecoder : public CAEStreamingDecoder
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{
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private:
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unsigned int nDataSize;
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unsigned int nOffsetToData;
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//bool bInitialised;
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uint32_t m_dataSize;
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uint32_t m_offsetToData;
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size_t m_maxBlockSize;
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void* m_buffer;
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struct FormatChunk
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{
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unsigned short audioFormat;
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unsigned short numChannels;
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unsigned int sampleRate;
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unsigned int byteRate;
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unsigned short blockAlign;
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unsigned short bitsPerSample;
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} formatChunk;
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uint16_t audioFormat;
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uint16_t numChannels;
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uint32_t sampleRate;
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uint32_t byteRate;
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uint16_t blockAlign;
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uint16_t bitsPerSample;
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} m_formatChunk;
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public:
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CAEWaveDecoder(CAEDataStream* stream)
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: CAEStreamingDecoder(stream)
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: CAEStreamingDecoder(stream), m_buffer(nullptr), m_maxBlockSize(0)
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{}
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virtual ~CAEWaveDecoder() override
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{
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delete[] m_buffer;
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}
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virtual bool Initialise() override;
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virtual uint32_t FillBuffer(void* pBuf, uint32_t nLen) override;
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virtual uint32_t GetStreamLengthMs() override
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{ return static_cast<unsigned long long>(nDataSize) * 8000 / (formatChunk.sampleRate*formatChunk.bitsPerSample*formatChunk.numChannels); }
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{ return (static_cast<uint64_t>(m_dataSize) * 1000) / m_formatChunk.blockAlign; }
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virtual uint32_t GetStreamPlayTimeMs() override
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{ return static_cast<unsigned long long>(GetStream()->GetCurrentPosition() - nOffsetToData) * 8000 / (formatChunk.sampleRate*formatChunk.bitsPerSample*formatChunk.numChannels); }
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{ return (static_cast<uint64_t>(GetStream()->GetCurrentPosition() - m_offsetToData) * 1000) / m_formatChunk.blockAlign; }
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virtual void SetCursor(uint32_t nTime) override
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{ auto nPos = static_cast<unsigned long long>(nTime) * (formatChunk.sampleRate*formatChunk.bitsPerSample*formatChunk.numChannels) / 8000;
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auto nModulo = (formatChunk.numChannels*formatChunk.bitsPerSample/8);
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auto nExtra = nPos % nModulo ? nModulo - (nPos % nModulo) : 0;
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GetStream()->Seek(nOffsetToData + nPos + nExtra, FILE_BEGIN); }
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{
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uint64_t sampleNum = (static_cast<uint64_t>(nTime) * m_formatChunk.sampleRate) / 1000;
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GetStream()->Seek( m_offsetToData + (static_cast<uint32_t>(sampleNum) * m_formatChunk.blockAlign), FILE_BEGIN );
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}
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virtual uint32_t GetSampleRate() override
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{ return formatChunk.sampleRate; }
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{ return m_formatChunk.sampleRate; }
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virtual uint32_t GetStreamID() override
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{ return GetStream()->GetID(); }
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private:
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size_t CalcBufferSize( uint32_t outputBuf );
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};
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