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* * |
* * |
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* libgig - C++ cross-platform Gigasampler format file loader library * |
* libgig - C++ cross-platform Gigasampler format file loader library * |
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* * |
* * |
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* Copyright (C) 2003, 2004 by Christian Schoenebeck * |
* Copyright (C) 2003-2005 by Christian Schoenebeck * |
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* <cuse@users.sourceforge.net> * |
* <cuse@users.sourceforge.net> * |
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* * |
* * |
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* This library is free software; you can redistribute it and/or modify * |
* This library is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
* it under the terms of the GNU General Public License as published by * |
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#include "gig.h" |
#include "gig.h" |
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namespace gig { |
#include <iostream> |
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namespace gig { namespace { |
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// *************** Internal functions for sample decopmression *************** |
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// * |
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inline int get12lo(const unsigned char* pSrc) |
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{ |
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const int x = pSrc[0] | (pSrc[1] & 0x0f) << 8; |
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return x & 0x800 ? x - 0x1000 : x; |
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} |
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inline int get12hi(const unsigned char* pSrc) |
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{ |
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const int x = pSrc[1] >> 4 | pSrc[2] << 4; |
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return x & 0x800 ? x - 0x1000 : x; |
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} |
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inline int16_t get16(const unsigned char* pSrc) |
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{ |
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return int16_t(pSrc[0] | pSrc[1] << 8); |
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} |
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inline int get24(const unsigned char* pSrc) |
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{ |
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const int x = pSrc[0] | pSrc[1] << 8 | pSrc[2] << 16; |
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return x & 0x800000 ? x - 0x1000000 : x; |
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} |
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void Decompress16(int compressionmode, const unsigned char* params, |
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int srcStep, int dstStep, |
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const unsigned char* pSrc, int16_t* pDst, |
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unsigned long currentframeoffset, |
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unsigned long copysamples) |
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{ |
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switch (compressionmode) { |
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case 0: // 16 bit uncompressed |
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pSrc += currentframeoffset * srcStep; |
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while (copysamples) { |
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*pDst = get16(pSrc); |
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pDst += dstStep; |
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pSrc += srcStep; |
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copysamples--; |
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} |
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break; |
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|
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case 1: // 16 bit compressed to 8 bit |
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int y = get16(params); |
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int dy = get16(params + 2); |
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while (currentframeoffset) { |
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dy -= int8_t(*pSrc); |
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y -= dy; |
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pSrc += srcStep; |
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currentframeoffset--; |
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} |
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while (copysamples) { |
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dy -= int8_t(*pSrc); |
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y -= dy; |
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*pDst = y; |
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pDst += dstStep; |
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pSrc += srcStep; |
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copysamples--; |
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} |
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break; |
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} |
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} |
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void Decompress24(int compressionmode, const unsigned char* params, |
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int dstStep, const unsigned char* pSrc, int16_t* pDst, |
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unsigned long currentframeoffset, |
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unsigned long copysamples) |
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{ |
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// Note: The 24 bits are truncated to 16 bits for now. |
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// Note: The calculation of the initial value of y is strange |
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// and not 100% correct. What should the first two parameters |
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// really be used for? Why are they two? The correct value for |
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// y seems to lie somewhere between the values of the first |
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// two parameters. |
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// |
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// Strange thing #2: The formula in SKIP_ONE gives values for |
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// y that are twice as high as they should be. That's why |
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// COPY_ONE shifts 9 steps instead of 8, and also why y is |
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// initialized with a sum instead of a mean value. |
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int y, dy, ddy; |
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#define GET_PARAMS(params) \ |
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y = (get24(params) + get24((params) + 3)); \ |
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dy = get24((params) + 6); \ |
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ddy = get24((params) + 9) |
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#define SKIP_ONE(x) \ |
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ddy -= (x); \ |
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dy -= ddy; \ |
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y -= dy |
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#define COPY_ONE(x) \ |
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SKIP_ONE(x); \ |
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*pDst = y >> 9; \ |
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pDst += dstStep |
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switch (compressionmode) { |
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case 2: // 24 bit uncompressed |
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pSrc += currentframeoffset * 3; |
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while (copysamples) { |
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*pDst = get24(pSrc) >> 8; |
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pDst += dstStep; |
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pSrc += 3; |
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copysamples--; |
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} |
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break; |
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case 3: // 24 bit compressed to 16 bit |
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GET_PARAMS(params); |
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while (currentframeoffset) { |
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SKIP_ONE(get16(pSrc)); |
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pSrc += 2; |
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currentframeoffset--; |
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} |
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while (copysamples) { |
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COPY_ONE(get16(pSrc)); |
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pSrc += 2; |
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copysamples--; |
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} |
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break; |
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case 4: // 24 bit compressed to 12 bit |
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GET_PARAMS(params); |
156 |
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while (currentframeoffset > 1) { |
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SKIP_ONE(get12lo(pSrc)); |
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SKIP_ONE(get12hi(pSrc)); |
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pSrc += 3; |
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currentframeoffset -= 2; |
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} |
162 |
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if (currentframeoffset) { |
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SKIP_ONE(get12lo(pSrc)); |
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currentframeoffset--; |
165 |
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if (copysamples) { |
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COPY_ONE(get12hi(pSrc)); |
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pSrc += 3; |
168 |
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copysamples--; |
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} |
170 |
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} |
171 |
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while (copysamples > 1) { |
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COPY_ONE(get12lo(pSrc)); |
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COPY_ONE(get12hi(pSrc)); |
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pSrc += 3; |
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copysamples -= 2; |
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} |
177 |
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if (copysamples) { |
178 |
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COPY_ONE(get12lo(pSrc)); |
179 |
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} |
180 |
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break; |
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case 5: // 24 bit compressed to 8 bit |
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GET_PARAMS(params); |
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while (currentframeoffset) { |
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SKIP_ONE(int8_t(*pSrc++)); |
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currentframeoffset--; |
187 |
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} |
188 |
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while (copysamples) { |
189 |
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COPY_ONE(int8_t(*pSrc++)); |
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copysamples--; |
191 |
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} |
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break; |
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} |
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} |
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const int bytesPerFrame[] = { 4096, 2052, 768, 524, 396, 268 }; |
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const int bytesPerFrameNoHdr[] = { 4096, 2048, 768, 512, 384, 256 }; |
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const int headerSize[] = { 0, 4, 0, 12, 12, 12 }; |
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const int bitsPerSample[] = { 16, 8, 24, 16, 12, 8 }; |
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} |
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// *************** Sample *************** |
// *************** Sample *************** |
204 |
// * |
// * |
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206 |
unsigned int Sample::Instances = 0; |
unsigned int Sample::Instances = 0; |
207 |
void* Sample::pDecompressionBuffer = NULL; |
buffer_t Sample::InternalDecompressionBuffer; |
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unsigned long Sample::DecompressionBufferSize = 0; |
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209 |
Sample::Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset) : DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) { |
Sample::Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset) : DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) { |
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Instances++; |
Instances++; |
223 |
smpl->Read(&SMPTEFormat, 1, 4); |
smpl->Read(&SMPTEFormat, 1, 4); |
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SMPTEOffset = smpl->ReadInt32(); |
SMPTEOffset = smpl->ReadInt32(); |
225 |
Loops = smpl->ReadInt32(); |
Loops = smpl->ReadInt32(); |
226 |
uint32_t manufByt = smpl->ReadInt32(); |
smpl->ReadInt32(); // manufByt |
227 |
LoopID = smpl->ReadInt32(); |
LoopID = smpl->ReadInt32(); |
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smpl->Read(&LoopType, 1, 4); |
smpl->Read(&LoopType, 1, 4); |
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LoopStart = smpl->ReadInt32(); |
LoopStart = smpl->ReadInt32(); |
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RAMCache.pStart = NULL; |
RAMCache.pStart = NULL; |
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RAMCache.NullExtensionSize = 0; |
RAMCache.NullExtensionSize = 0; |
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if (BitDepth > 24) throw gig::Exception("Only samples up to 24 bit supported"); |
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Compressed = (waveList->GetSubChunk(CHUNK_ID_EWAV)); |
Compressed = (waveList->GetSubChunk(CHUNK_ID_EWAV)); |
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if (Compressed) { |
if (Compressed) { |
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ScanCompressedSample(); |
ScanCompressedSample(); |
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} |
} |
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if (BitDepth > 24) throw gig::Exception("Only samples up to 24 bit supported"); |
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if (Compressed && Channels == 1) throw gig::Exception("Mono compressed samples not yet supported"); |
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if (Compressed && BitDepth == 24) throw gig::Exception("24 bit compressed samples not yet supported"); |
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// we use a buffer for decompression and for truncating 24 bit samples to 16 bit |
// we use a buffer for decompression and for truncating 24 bit samples to 16 bit |
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if ((Compressed || BitDepth == 24) && !pDecompressionBuffer) { |
if ((Compressed || BitDepth == 24) && !InternalDecompressionBuffer.Size) { |
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pDecompressionBuffer = new int8_t[INITIAL_SAMPLE_BUFFER_SIZE]; |
InternalDecompressionBuffer.pStart = new unsigned char[INITIAL_SAMPLE_BUFFER_SIZE]; |
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DecompressionBufferSize = INITIAL_SAMPLE_BUFFER_SIZE; |
InternalDecompressionBuffer.Size = INITIAL_SAMPLE_BUFFER_SIZE; |
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} |
} |
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FrameOffset = 0; // just for streaming compressed samples |
FrameOffset = 0; // just for streaming compressed samples |
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this->SamplesTotal = 0; |
this->SamplesTotal = 0; |
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std::list<unsigned long> frameOffsets; |
std::list<unsigned long> frameOffsets; |
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SamplesPerFrame = BitDepth == 24 ? 256 : 2048; |
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WorstCaseFrameSize = SamplesPerFrame * FrameSize + Channels; // +Channels for compression flag |
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// Scanning |
// Scanning |
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pCkData->SetPos(0); |
pCkData->SetPos(0); |
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while (pCkData->GetState() == RIFF::stream_ready) { |
if (Channels == 2) { // Stereo |
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frameOffsets.push_back(pCkData->GetPos()); |
for (int i = 0 ; ; i++) { |
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int16_t compressionmode = pCkData->ReadInt16(); |
// for 24 bit samples every 8:th frame offset is |
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this->SamplesTotal += 2048; |
// stored, to save some memory |
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switch (compressionmode) { |
if (BitDepth != 24 || (i & 7) == 0) frameOffsets.push_back(pCkData->GetPos()); |
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case 1: // left channel compressed |
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case 256: // right channel compressed |
const int mode_l = pCkData->ReadUint8(); |
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pCkData->SetPos(6148, RIFF::stream_curpos); |
const int mode_r = pCkData->ReadUint8(); |
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if (mode_l > 5 || mode_r > 5) throw gig::Exception("Unknown compression mode"); |
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const unsigned long frameSize = bytesPerFrame[mode_l] + bytesPerFrame[mode_r]; |
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279 |
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if (pCkData->RemainingBytes() <= frameSize) { |
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SamplesInLastFrame = |
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((pCkData->RemainingBytes() - headerSize[mode_l] - headerSize[mode_r]) << 3) / |
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(bitsPerSample[mode_l] + bitsPerSample[mode_r]); |
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SamplesTotal += SamplesInLastFrame; |
284 |
break; |
break; |
285 |
case 257: // both channels compressed |
} |
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pCkData->SetPos(4104, RIFF::stream_curpos); |
SamplesTotal += SamplesPerFrame; |
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pCkData->SetPos(frameSize, RIFF::stream_curpos); |
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} |
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} |
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else { // Mono |
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for (int i = 0 ; ; i++) { |
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if (BitDepth != 24 || (i & 7) == 0) frameOffsets.push_back(pCkData->GetPos()); |
293 |
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294 |
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const int mode = pCkData->ReadUint8(); |
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if (mode > 5) throw gig::Exception("Unknown compression mode"); |
296 |
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const unsigned long frameSize = bytesPerFrame[mode]; |
297 |
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298 |
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if (pCkData->RemainingBytes() <= frameSize) { |
299 |
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SamplesInLastFrame = |
300 |
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((pCkData->RemainingBytes() - headerSize[mode]) << 3) / bitsPerSample[mode]; |
301 |
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SamplesTotal += SamplesInLastFrame; |
302 |
break; |
break; |
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default: // both channels uncompressed |
} |
304 |
pCkData->SetPos(8192, RIFF::stream_curpos); |
SamplesTotal += SamplesPerFrame; |
305 |
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pCkData->SetPos(frameSize, RIFF::stream_curpos); |
306 |
} |
} |
307 |
} |
} |
308 |
pCkData->SetPos(0); |
pCkData->SetPos(0); |
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//FIXME: only seen compressed samples with 16 bit stereo so far |
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this->FrameSize = 4; |
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this->BitDepth = 16; |
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310 |
// Build the frames table (which is used for fast resolving of a frame's chunk offset) |
// Build the frames table (which is used for fast resolving of a frame's chunk offset) |
311 |
if (FrameTable) delete[] FrameTable; |
if (FrameTable) delete[] FrameTable; |
312 |
FrameTable = new unsigned long[frameOffsets.size()]; |
FrameTable = new unsigned long[frameOffsets.size()]; |
342 |
* that will be returned to determine the actual cached samples, but note |
* that will be returned to determine the actual cached samples, but note |
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* that the size is given in bytes! You get the number of actually cached |
* that the size is given in bytes! You get the number of actually cached |
344 |
* samples by dividing it by the frame size of the sample: |
* samples by dividing it by the frame size of the sample: |
345 |
* |
* @code |
346 |
* buffer_t buf = pSample->LoadSampleData(acquired_samples); |
* buffer_t buf = pSample->LoadSampleData(acquired_samples); |
347 |
* long cachedsamples = buf.Size / pSample->FrameSize; |
* long cachedsamples = buf.Size / pSample->FrameSize; |
348 |
|
* @endcode |
349 |
* |
* |
350 |
* @param SampleCount - number of sample points to load into RAM |
* @param SampleCount - number of sample points to load into RAM |
351 |
* @returns buffer_t structure with start address and size of |
* @returns buffer_t structure with start address and size of |
391 |
* that will be returned to determine the actual cached samples, but note |
* that will be returned to determine the actual cached samples, but note |
392 |
* that the size is given in bytes! You get the number of actually cached |
* that the size is given in bytes! You get the number of actually cached |
393 |
* samples by dividing it by the frame size of the sample: |
* samples by dividing it by the frame size of the sample: |
394 |
* |
* @code |
395 |
* buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(acquired_samples, null_samples); |
* buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(acquired_samples, null_samples); |
396 |
* long cachedsamples = buf.Size / pSample->FrameSize; |
* long cachedsamples = buf.Size / pSample->FrameSize; |
397 |
* |
* @endcode |
398 |
* The method will add \a NullSamplesCount silence samples past the |
* The method will add \a NullSamplesCount silence samples past the |
399 |
* official buffer end (this won't affect the 'Size' member of the |
* official buffer end (this won't affect the 'Size' member of the |
400 |
* buffer_t structure, that means 'Size' always reflects the size of the |
* buffer_t structure, that means 'Size' always reflects the size of the |
525 |
* for the next time you call this method is stored in \a pPlaybackState. |
* for the next time you call this method is stored in \a pPlaybackState. |
526 |
* You have to allocate and initialize the playback_state_t structure by |
* You have to allocate and initialize the playback_state_t structure by |
527 |
* yourself before you use it to stream a sample: |
* yourself before you use it to stream a sample: |
528 |
* |
* @code |
529 |
* <i> |
* gig::playback_state_t playbackstate; |
530 |
* gig::playback_state_t playbackstate; <br> |
* playbackstate.position = 0; |
531 |
* playbackstate.position = 0; <br> |
* playbackstate.reverse = false; |
532 |
* playbackstate.reverse = false; <br> |
* playbackstate.loop_cycles_left = pSample->LoopPlayCount; |
533 |
* playbackstate.loop_cycles_left = pSample->LoopPlayCount; <br> |
* @endcode |
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* </i> |
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* |
|
534 |
* You don't have to take care of things like if there is actually a loop |
* You don't have to take care of things like if there is actually a loop |
535 |
* defined or if the current read position is located within a loop area. |
* defined or if the current read position is located within a loop area. |
536 |
* The method already handles such cases by itself. |
* The method already handles such cases by itself. |
537 |
* |
* |
538 |
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* <b>Caution:</b> If you are using more than one streaming thread, you |
539 |
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* have to use an external decompression buffer for <b>EACH</b> |
540 |
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* streaming thread to avoid race conditions and crashes! |
541 |
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* |
542 |
* @param pBuffer destination buffer |
* @param pBuffer destination buffer |
543 |
* @param SampleCount number of sample points to read |
* @param SampleCount number of sample points to read |
544 |
* @param pPlaybackState will be used to store and reload the playback |
* @param pPlaybackState will be used to store and reload the playback |
545 |
* state for the next ReadAndLoop() call |
* state for the next ReadAndLoop() call |
546 |
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* @param pExternalDecompressionBuffer (optional) external buffer to use for decompression |
547 |
* @returns number of successfully read sample points |
* @returns number of successfully read sample points |
548 |
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* @see CreateDecompressionBuffer() |
549 |
*/ |
*/ |
550 |
unsigned long Sample::ReadAndLoop(void* pBuffer, unsigned long SampleCount, playback_state_t* pPlaybackState) { |
unsigned long Sample::ReadAndLoop(void* pBuffer, unsigned long SampleCount, playback_state_t* pPlaybackState, buffer_t* pExternalDecompressionBuffer) { |
551 |
unsigned long samplestoread = SampleCount, totalreadsamples = 0, readsamples, samplestoloopend; |
unsigned long samplestoread = SampleCount, totalreadsamples = 0, readsamples, samplestoloopend; |
552 |
uint8_t* pDst = (uint8_t*) pBuffer; |
uint8_t* pDst = (uint8_t*) pBuffer; |
553 |
|
|
565 |
if (!pPlaybackState->reverse) { // forward playback |
if (!pPlaybackState->reverse) { // forward playback |
566 |
do { |
do { |
567 |
samplestoloopend = this->LoopEnd - GetPos(); |
samplestoloopend = this->LoopEnd - GetPos(); |
568 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend)); |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
569 |
samplestoread -= readsamples; |
samplestoread -= readsamples; |
570 |
totalreadsamples += readsamples; |
totalreadsamples += readsamples; |
571 |
if (readsamples == samplestoloopend) { |
if (readsamples == samplestoloopend) { |
591 |
|
|
592 |
// read samples for backward playback |
// read samples for backward playback |
593 |
do { |
do { |
594 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoreadinloop); |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoreadinloop, pExternalDecompressionBuffer); |
595 |
samplestoreadinloop -= readsamples; |
samplestoreadinloop -= readsamples; |
596 |
samplestoread -= readsamples; |
samplestoread -= readsamples; |
597 |
totalreadsamples += readsamples; |
totalreadsamples += readsamples; |
615 |
// forward playback (not entered the loop yet) |
// forward playback (not entered the loop yet) |
616 |
if (!pPlaybackState->reverse) do { |
if (!pPlaybackState->reverse) do { |
617 |
samplestoloopend = this->LoopEnd - GetPos(); |
samplestoloopend = this->LoopEnd - GetPos(); |
618 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend)); |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
619 |
samplestoread -= readsamples; |
samplestoread -= readsamples; |
620 |
totalreadsamples += readsamples; |
totalreadsamples += readsamples; |
621 |
if (readsamples == samplestoloopend) { |
if (readsamples == samplestoloopend) { |
645 |
// if not endless loop check if max. number of loop cycles have been passed |
// if not endless loop check if max. number of loop cycles have been passed |
646 |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
647 |
samplestoloopend = this->LoopEnd - GetPos(); |
samplestoloopend = this->LoopEnd - GetPos(); |
648 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoreadinloop, samplestoloopend)); |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoreadinloop, samplestoloopend), pExternalDecompressionBuffer); |
649 |
samplestoreadinloop -= readsamples; |
samplestoreadinloop -= readsamples; |
650 |
samplestoread -= readsamples; |
samplestoread -= readsamples; |
651 |
totalreadsamples += readsamples; |
totalreadsamples += readsamples; |
667 |
// if not endless loop check if max. number of loop cycles have been passed |
// if not endless loop check if max. number of loop cycles have been passed |
668 |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
669 |
samplestoloopend = this->LoopEnd - GetPos(); |
samplestoloopend = this->LoopEnd - GetPos(); |
670 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend)); |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
671 |
samplestoread -= readsamples; |
samplestoread -= readsamples; |
672 |
totalreadsamples += readsamples; |
totalreadsamples += readsamples; |
673 |
if (readsamples == samplestoloopend) { |
if (readsamples == samplestoloopend) { |
682 |
|
|
683 |
// read on without looping |
// read on without looping |
684 |
if (samplestoread) do { |
if (samplestoread) do { |
685 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoread); |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoread, pExternalDecompressionBuffer); |
686 |
samplestoread -= readsamples; |
samplestoread -= readsamples; |
687 |
totalreadsamples += readsamples; |
totalreadsamples += readsamples; |
688 |
} while (readsamples && samplestoread); |
} while (readsamples && samplestoread); |
701 |
* and <i>SetPos()</i> if you don't want to load the sample into RAM, |
* and <i>SetPos()</i> if you don't want to load the sample into RAM, |
702 |
* thus for disk streaming. |
* thus for disk streaming. |
703 |
* |
* |
704 |
|
* <b>Caution:</b> If you are using more than one streaming thread, you |
705 |
|
* have to use an external decompression buffer for <b>EACH</b> |
706 |
|
* streaming thread to avoid race conditions and crashes! |
707 |
|
* |
708 |
* @param pBuffer destination buffer |
* @param pBuffer destination buffer |
709 |
* @param SampleCount number of sample points to read |
* @param SampleCount number of sample points to read |
710 |
|
* @param pExternalDecompressionBuffer (optional) external buffer to use for decompression |
711 |
* @returns number of successfully read sample points |
* @returns number of successfully read sample points |
712 |
* @see SetPos() |
* @see SetPos(), CreateDecompressionBuffer() |
713 |
*/ |
*/ |
714 |
unsigned long Sample::Read(void* pBuffer, unsigned long SampleCount) { |
unsigned long Sample::Read(void* pBuffer, unsigned long SampleCount, buffer_t* pExternalDecompressionBuffer) { |
715 |
if (SampleCount == 0) return 0; |
if (SampleCount == 0) return 0; |
716 |
if (!Compressed) { |
if (!Compressed) { |
717 |
if (BitDepth == 24) { |
if (BitDepth == 24) { |
718 |
// 24 bit sample. For now just truncate to 16 bit. |
// 24 bit sample. For now just truncate to 16 bit. |
719 |
int8_t* pSrc = (int8_t*)this->pDecompressionBuffer; |
unsigned char* pSrc = (unsigned char*) ((pExternalDecompressionBuffer) ? pExternalDecompressionBuffer->pStart : this->InternalDecompressionBuffer.pStart); |
720 |
int8_t* pDst = (int8_t*)pBuffer; |
int16_t* pDst = static_cast<int16_t*>(pBuffer); |
721 |
unsigned long n = pCkData->Read(pSrc, SampleCount, FrameSize); |
if (Channels == 2) { // Stereo |
722 |
for (int i = SampleCount * (FrameSize / 3) ; i > 0 ; i--) { |
unsigned long readBytes = pCkData->Read(pSrc, SampleCount * 6, 1); |
723 |
pSrc++; |
pSrc++; |
724 |
*pDst++ = *pSrc++; |
for (unsigned long i = readBytes ; i > 0 ; i -= 3) { |
725 |
*pDst++ = *pSrc++; |
*pDst++ = get16(pSrc); |
726 |
|
pSrc += 3; |
727 |
|
} |
728 |
|
return (pDst - static_cast<int16_t*>(pBuffer)) >> 1; |
729 |
} |
} |
730 |
return SampleCount; |
else { // Mono |
731 |
} else { |
unsigned long readBytes = pCkData->Read(pSrc, SampleCount * 3, 1); |
732 |
return pCkData->Read(pBuffer, SampleCount, FrameSize); //FIXME: channel inversion due to endian correction? |
pSrc++; |
733 |
|
for (unsigned long i = readBytes ; i > 0 ; i -= 3) { |
734 |
|
*pDst++ = get16(pSrc); |
735 |
|
pSrc += 3; |
736 |
|
} |
737 |
|
return pDst - static_cast<int16_t*>(pBuffer); |
738 |
|
} |
739 |
|
} |
740 |
|
else { // 16 bit |
741 |
|
// (pCkData->Read does endian correction) |
742 |
|
return Channels == 2 ? pCkData->Read(pBuffer, SampleCount << 1, 2) >> 1 |
743 |
|
: pCkData->Read(pBuffer, SampleCount, 2); |
744 |
} |
} |
745 |
} |
} |
746 |
else { //FIXME: no support for mono compressed samples yet, are there any? |
else { |
747 |
if (this->SamplePos >= this->SamplesTotal) return 0; |
if (this->SamplePos >= this->SamplesTotal) return 0; |
748 |
//TODO: efficiency: we simply assume here that all frames are compressed, maybe we should test for an average compression rate |
//TODO: efficiency: maybe we should test for an average compression rate |
749 |
// best case needed buffer size (all frames compressed) |
unsigned long assumedsize = GuessSize(SampleCount), |
|
unsigned long assumedsize = (SampleCount << 1) + // *2 (16 Bit, stereo, but assume all frames compressed) |
|
|
(SampleCount >> 10) + // 10 bytes header per 2048 sample points |
|
|
8194, // at least one worst case sample frame |
|
750 |
remainingbytes = 0, // remaining bytes in the local buffer |
remainingbytes = 0, // remaining bytes in the local buffer |
751 |
remainingsamples = SampleCount, |
remainingsamples = SampleCount, |
752 |
copysamples; |
copysamples, skipsamples, |
753 |
int currentframeoffset = this->FrameOffset; // offset in current sample frame since last Read() |
currentframeoffset = this->FrameOffset; // offset in current sample frame since last Read() |
754 |
this->FrameOffset = 0; |
this->FrameOffset = 0; |
755 |
|
|
756 |
if (assumedsize > this->DecompressionBufferSize) { |
buffer_t* pDecompressionBuffer = (pExternalDecompressionBuffer) ? pExternalDecompressionBuffer : &InternalDecompressionBuffer; |
757 |
// local buffer reallocation - hope this won't happen |
|
758 |
if (this->pDecompressionBuffer) delete[] (int8_t*) this->pDecompressionBuffer; |
// if decompression buffer too small, then reduce amount of samples to read |
759 |
this->pDecompressionBuffer = new int8_t[assumedsize << 1]; // double of current needed size |
if (pDecompressionBuffer->Size < assumedsize) { |
760 |
this->DecompressionBufferSize = assumedsize; |
std::cerr << "gig::Read(): WARNING - decompression buffer size too small!" << std::endl; |
761 |
|
SampleCount = WorstCaseMaxSamples(pDecompressionBuffer); |
762 |
|
remainingsamples = SampleCount; |
763 |
|
assumedsize = GuessSize(SampleCount); |
764 |
} |
} |
765 |
|
|
766 |
int16_t compressionmode, left, dleft, right, dright; |
unsigned char* pSrc = (unsigned char*) pDecompressionBuffer->pStart; |
767 |
int8_t* pSrc = (int8_t*) this->pDecompressionBuffer; |
int16_t* pDst = static_cast<int16_t*>(pBuffer); |
|
int16_t* pDst = (int16_t*) pBuffer; |
|
768 |
remainingbytes = pCkData->Read(pSrc, assumedsize, 1); |
remainingbytes = pCkData->Read(pSrc, assumedsize, 1); |
769 |
|
|
770 |
while (remainingsamples) { |
while (remainingsamples && remainingbytes) { |
771 |
|
unsigned long framesamples = SamplesPerFrame; |
772 |
// reload from disk to local buffer if needed |
unsigned long framebytes, rightChannelOffset = 0, nextFrameOffset; |
773 |
if (remainingbytes < 8194) { |
|
774 |
if (pCkData->GetState() != RIFF::stream_ready) { |
int mode_l = *pSrc++, mode_r = 0; |
775 |
this->SamplePos = this->SamplesTotal; |
|
776 |
return (SampleCount - remainingsamples); |
if (Channels == 2) { |
777 |
|
mode_r = *pSrc++; |
778 |
|
framebytes = bytesPerFrame[mode_l] + bytesPerFrame[mode_r] + 2; |
779 |
|
rightChannelOffset = bytesPerFrameNoHdr[mode_l]; |
780 |
|
nextFrameOffset = rightChannelOffset + bytesPerFrameNoHdr[mode_r]; |
781 |
|
if (remainingbytes < framebytes) { // last frame in sample |
782 |
|
framesamples = SamplesInLastFrame; |
783 |
|
if (mode_l == 4 && (framesamples & 1)) { |
784 |
|
rightChannelOffset = ((framesamples + 1) * bitsPerSample[mode_l]) >> 3; |
785 |
|
} |
786 |
|
else { |
787 |
|
rightChannelOffset = (framesamples * bitsPerSample[mode_l]) >> 3; |
788 |
|
} |
789 |
|
} |
790 |
|
} |
791 |
|
else { |
792 |
|
framebytes = bytesPerFrame[mode_l] + 1; |
793 |
|
nextFrameOffset = bytesPerFrameNoHdr[mode_l]; |
794 |
|
if (remainingbytes < framebytes) { |
795 |
|
framesamples = SamplesInLastFrame; |
796 |
} |
} |
|
assumedsize = remainingsamples; |
|
|
assumedsize = (assumedsize << 1) + // *2 (16 Bit, stereo, but assume all frames compressed) |
|
|
(assumedsize >> 10) + // 10 bytes header per 2048 sample points |
|
|
8194; // at least one worst case sample frame |
|
|
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
|
|
if (pCkData->RemainingBytes() < assumedsize) assumedsize = pCkData->RemainingBytes(); |
|
|
remainingbytes = pCkData->Read(this->pDecompressionBuffer, assumedsize, 1); |
|
|
pSrc = (int8_t*) this->pDecompressionBuffer; |
|
797 |
} |
} |
798 |
|
|
799 |
// determine how many samples in this frame to skip and read |
// determine how many samples in this frame to skip and read |
800 |
if (remainingsamples >= 2048) { |
if (currentframeoffset + remainingsamples >= framesamples) { |
801 |
copysamples = 2048 - currentframeoffset; |
if (currentframeoffset <= framesamples) { |
802 |
remainingsamples -= copysamples; |
copysamples = framesamples - currentframeoffset; |
803 |
|
skipsamples = currentframeoffset; |
804 |
|
} |
805 |
|
else { |
806 |
|
copysamples = 0; |
807 |
|
skipsamples = framesamples; |
808 |
|
} |
809 |
} |
} |
810 |
else { |
else { |
811 |
|
// This frame has enough data for pBuffer, but not |
812 |
|
// all of the frame is needed. Set file position |
813 |
|
// to start of this frame for next call to Read. |
814 |
copysamples = remainingsamples; |
copysamples = remainingsamples; |
815 |
if (currentframeoffset + copysamples > 2048) { |
skipsamples = currentframeoffset; |
816 |
copysamples = 2048 - currentframeoffset; |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
817 |
remainingsamples -= copysamples; |
this->FrameOffset = currentframeoffset + copysamples; |
818 |
} |
} |
819 |
else { |
remainingsamples -= copysamples; |
820 |
|
|
821 |
|
if (remainingbytes > framebytes) { |
822 |
|
remainingbytes -= framebytes; |
823 |
|
if (remainingsamples == 0 && |
824 |
|
currentframeoffset + copysamples == framesamples) { |
825 |
|
// This frame has enough data for pBuffer, and |
826 |
|
// all of the frame is needed. Set file |
827 |
|
// position to start of next frame for next |
828 |
|
// call to Read. FrameOffset is 0. |
829 |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
|
remainingsamples = 0; |
|
|
this->FrameOffset = currentframeoffset + copysamples; |
|
830 |
} |
} |
831 |
} |
} |
832 |
|
else remainingbytes = 0; |
833 |
|
|
834 |
// decompress and copy current frame from local buffer to destination buffer |
currentframeoffset -= skipsamples; |
835 |
compressionmode = *(int16_t*)pSrc; pSrc+=2; |
|
836 |
switch (compressionmode) { |
if (copysamples == 0) { |
837 |
case 1: // left channel compressed |
// skip this frame |
838 |
remainingbytes -= 6150; // (left 8 bit, right 16 bit, +6 byte header) |
pSrc += framebytes - Channels; |
839 |
if (!remainingsamples && copysamples == 2048) |
} |
840 |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
else { |
841 |
|
const unsigned char* const param_l = pSrc; |
842 |
left = *(int16_t*)pSrc; pSrc+=2; |
if (BitDepth == 24) { |
843 |
dleft = *(int16_t*)pSrc; pSrc+=2; |
if (mode_l != 2) pSrc += 12; |
844 |
while (currentframeoffset) { |
|
845 |
dleft -= *pSrc; |
if (Channels == 2) { // Stereo |
846 |
left -= dleft; |
const unsigned char* const param_r = pSrc; |
847 |
pSrc+=3; // 8 bit left channel, skip uncompressed right channel (16 bit) |
if (mode_r != 2) pSrc += 12; |
848 |
currentframeoffset--; |
|
849 |
} |
Decompress24(mode_l, param_l, 2, pSrc, pDst, skipsamples, copysamples); |
850 |
while (copysamples) { |
Decompress24(mode_r, param_r, 2, pSrc + rightChannelOffset, pDst + 1, |
851 |
dleft -= *pSrc; pSrc++; |
skipsamples, copysamples); |
852 |
left -= dleft; |
pDst += copysamples << 1; |
|
*pDst = left; pDst++; |
|
|
*pDst = *(int16_t*)pSrc; pDst++; pSrc+=2; |
|
|
copysamples--; |
|
|
} |
|
|
break; |
|
|
case 256: // right channel compressed |
|
|
remainingbytes -= 6150; // (left 16 bit, right 8 bit, +6 byte header) |
|
|
if (!remainingsamples && copysamples == 2048) |
|
|
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
|
|
|
|
|
right = *(int16_t*)pSrc; pSrc+=2; |
|
|
dright = *(int16_t*)pSrc; pSrc+=2; |
|
|
if (currentframeoffset) { |
|
|
pSrc+=2; // skip uncompressed left channel, now we can increment by 3 |
|
|
while (currentframeoffset) { |
|
|
dright -= *pSrc; |
|
|
right -= dright; |
|
|
pSrc+=3; // 8 bit right channel, skip uncompressed left channel (16 bit) |
|
|
currentframeoffset--; |
|
|
} |
|
|
pSrc-=2; // back aligned to left channel |
|
853 |
} |
} |
854 |
while (copysamples) { |
else { // Mono |
855 |
*pDst = *(int16_t*)pSrc; pDst++; pSrc+=2; |
Decompress24(mode_l, param_l, 1, pSrc, pDst, skipsamples, copysamples); |
856 |
dright -= *pSrc; pSrc++; |
pDst += copysamples; |
|
right -= dright; |
|
|
*pDst = right; pDst++; |
|
|
copysamples--; |
|
857 |
} |
} |
858 |
break; |
} |
859 |
case 257: // both channels compressed |
else { // 16 bit |
860 |
remainingbytes -= 4106; // (left 8 bit, right 8 bit, +10 byte header) |
if (mode_l) pSrc += 4; |
861 |
if (!remainingsamples && copysamples == 2048) |
|
862 |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
int step; |
863 |
|
if (Channels == 2) { // Stereo |
864 |
left = *(int16_t*)pSrc; pSrc+=2; |
const unsigned char* const param_r = pSrc; |
865 |
dleft = *(int16_t*)pSrc; pSrc+=2; |
if (mode_r) pSrc += 4; |
866 |
right = *(int16_t*)pSrc; pSrc+=2; |
|
867 |
dright = *(int16_t*)pSrc; pSrc+=2; |
step = (2 - mode_l) + (2 - mode_r); |
868 |
while (currentframeoffset) { |
Decompress16(mode_l, param_l, step, 2, pSrc, pDst, skipsamples, copysamples); |
869 |
dleft -= *pSrc; pSrc++; |
Decompress16(mode_r, param_r, step, 2, pSrc + (2 - mode_l), pDst + 1, |
870 |
left -= dleft; |
skipsamples, copysamples); |
871 |
dright -= *pSrc; pSrc++; |
pDst += copysamples << 1; |
|
right -= dright; |
|
|
currentframeoffset--; |
|
872 |
} |
} |
873 |
while (copysamples) { |
else { // Mono |
874 |
dleft -= *pSrc; pSrc++; |
step = 2 - mode_l; |
875 |
left -= dleft; |
Decompress16(mode_l, param_l, step, 1, pSrc, pDst, skipsamples, copysamples); |
876 |
dright -= *pSrc; pSrc++; |
pDst += copysamples; |
|
right -= dright; |
|
|
*pDst = left; pDst++; |
|
|
*pDst = right; pDst++; |
|
|
copysamples--; |
|
877 |
} |
} |
878 |
break; |
} |
879 |
default: // both channels uncompressed |
pSrc += nextFrameOffset; |
|
remainingbytes -= 8194; // (left 16 bit, right 16 bit, +2 byte header) |
|
|
if (!remainingsamples && copysamples == 2048) |
|
|
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
|
|
|
|
|
pSrc += currentframeoffset << 2; |
|
|
currentframeoffset = 0; |
|
|
memcpy(pDst, pSrc, copysamples << 2); |
|
|
pDst += copysamples << 1; |
|
|
pSrc += copysamples << 2; |
|
|
break; |
|
880 |
} |
} |
881 |
} |
|
882 |
|
// reload from disk to local buffer if needed |
883 |
|
if (remainingsamples && remainingbytes < WorstCaseFrameSize && pCkData->GetState() == RIFF::stream_ready) { |
884 |
|
assumedsize = GuessSize(remainingsamples); |
885 |
|
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
886 |
|
if (pCkData->RemainingBytes() < assumedsize) assumedsize = pCkData->RemainingBytes(); |
887 |
|
remainingbytes = pCkData->Read(pDecompressionBuffer->pStart, assumedsize, 1); |
888 |
|
pSrc = (unsigned char*) pDecompressionBuffer->pStart; |
889 |
|
} |
890 |
|
} // while |
891 |
|
|
892 |
this->SamplePos += (SampleCount - remainingsamples); |
this->SamplePos += (SampleCount - remainingsamples); |
893 |
if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal; |
if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal; |
894 |
return (SampleCount - remainingsamples); |
return (SampleCount - remainingsamples); |
895 |
} |
} |
896 |
} |
} |
897 |
|
|
898 |
|
/** |
899 |
|
* Allocates a decompression buffer for streaming (compressed) samples |
900 |
|
* with Sample::Read(). If you are using more than one streaming thread |
901 |
|
* in your application you <b>HAVE</b> to create a decompression buffer |
902 |
|
* for <b>EACH</b> of your streaming threads and provide it with the |
903 |
|
* Sample::Read() call in order to avoid race conditions and crashes. |
904 |
|
* |
905 |
|
* You should free the memory occupied by the allocated buffer(s) once |
906 |
|
* you don't need one of your streaming threads anymore by calling |
907 |
|
* DestroyDecompressionBuffer(). |
908 |
|
* |
909 |
|
* @param MaxReadSize - the maximum size (in sample points) you ever |
910 |
|
* expect to read with one Read() call |
911 |
|
* @returns allocated decompression buffer |
912 |
|
* @see DestroyDecompressionBuffer() |
913 |
|
*/ |
914 |
|
buffer_t Sample::CreateDecompressionBuffer(unsigned long MaxReadSize) { |
915 |
|
buffer_t result; |
916 |
|
const double worstCaseHeaderOverhead = |
917 |
|
(256.0 /*frame size*/ + 12.0 /*header*/ + 2.0 /*compression type flag (stereo)*/) / 256.0; |
918 |
|
result.Size = (unsigned long) (double(MaxReadSize) * 3.0 /*(24 Bit)*/ * 2.0 /*stereo*/ * worstCaseHeaderOverhead); |
919 |
|
result.pStart = new int8_t[result.Size]; |
920 |
|
result.NullExtensionSize = 0; |
921 |
|
return result; |
922 |
|
} |
923 |
|
|
924 |
|
/** |
925 |
|
* Free decompression buffer, previously created with |
926 |
|
* CreateDecompressionBuffer(). |
927 |
|
* |
928 |
|
* @param DecompressionBuffer - previously allocated decompression |
929 |
|
* buffer to free |
930 |
|
*/ |
931 |
|
void Sample::DestroyDecompressionBuffer(buffer_t& DecompressionBuffer) { |
932 |
|
if (DecompressionBuffer.Size && DecompressionBuffer.pStart) { |
933 |
|
delete[] (int8_t*) DecompressionBuffer.pStart; |
934 |
|
DecompressionBuffer.pStart = NULL; |
935 |
|
DecompressionBuffer.Size = 0; |
936 |
|
DecompressionBuffer.NullExtensionSize = 0; |
937 |
|
} |
938 |
|
} |
939 |
|
|
940 |
Sample::~Sample() { |
Sample::~Sample() { |
941 |
Instances--; |
Instances--; |
942 |
if (!Instances && pDecompressionBuffer) delete[] (int8_t*) pDecompressionBuffer; |
if (!Instances && InternalDecompressionBuffer.Size) { |
943 |
|
delete[] (unsigned char*) InternalDecompressionBuffer.pStart; |
944 |
|
InternalDecompressionBuffer.pStart = NULL; |
945 |
|
InternalDecompressionBuffer.Size = 0; |
946 |
|
} |
947 |
if (FrameTable) delete[] FrameTable; |
if (FrameTable) delete[] FrameTable; |
948 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
949 |
} |
} |
1125 |
VelocityResponseCurveScaling); |
VelocityResponseCurveScaling); |
1126 |
(*pVelocityTables)[tableKey] = pVelocityAttenuationTable; // put the new table into the tables map |
(*pVelocityTables)[tableKey] = pVelocityAttenuationTable; // put the new table into the tables map |
1127 |
} |
} |
1128 |
|
|
1129 |
|
SampleAttenuation = pow(10.0, -Gain / (20.0 * 655360)); |
1130 |
} |
} |
1131 |
|
|
1132 |
leverage_ctrl_t DimensionRegion::DecodeLeverageController(_lev_ctrl_t EncodedController) { |
leverage_ctrl_t DimensionRegion::DecodeLeverageController(_lev_ctrl_t EncodedController) { |
1536 |
} |
} |
1537 |
|
|
1538 |
Sample* Region::GetSampleFromWavePool(unsigned int WavePoolTableIndex) { |
Sample* Region::GetSampleFromWavePool(unsigned int WavePoolTableIndex) { |
1539 |
|
if ((int32_t)WavePoolTableIndex == -1) return NULL; |
1540 |
File* file = (File*) GetParent()->GetParent(); |
File* file = (File*) GetParent()->GetParent(); |
1541 |
unsigned long soughtoffset = file->pWavePoolTable[WavePoolTableIndex]; |
unsigned long soughtoffset = file->pWavePoolTable[WavePoolTableIndex]; |
1542 |
Sample* sample = file->GetFirstSample(); |
Sample* sample = file->GetFirstSample(); |
1645 |
* @see GetFirstRegion() |
* @see GetFirstRegion() |
1646 |
*/ |
*/ |
1647 |
Region* Instrument::GetNextRegion() { |
Region* Instrument::GetNextRegion() { |
1648 |
if (RegionIndex < 0 || RegionIndex >= Regions) return NULL; |
if (RegionIndex < 0 || uint32_t(RegionIndex) >= Regions) return NULL; |
1649 |
return pRegions[RegionIndex++]; |
return pRegions[RegionIndex++]; |
1650 |
} |
} |
1651 |
|
|
1668 |
SamplesIterator++; |
SamplesIterator++; |
1669 |
} |
} |
1670 |
pSamples->clear(); |
pSamples->clear(); |
1671 |
|
delete pSamples; |
1672 |
|
|
1673 |
} |
} |
1674 |
// free instruments |
// free instruments |
1679 |
InstrumentsIterator++; |
InstrumentsIterator++; |
1680 |
} |
} |
1681 |
pInstruments->clear(); |
pInstruments->clear(); |
1682 |
|
delete pInstruments; |
1683 |
} |
} |
1684 |
} |
} |
1685 |
|
|