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/*************************************************************************** |
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* * |
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* libgig - C++ cross-platform Gigasampler format file loader library * |
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* * |
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* Copyright (C) 2003-2005 by Christian Schoenebeck * |
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* <cuse@users.sourceforge.net> * |
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* * |
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* 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 * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This library is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this library; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include "gig.h" |
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|
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#include <iostream> |
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|
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namespace gig { namespace { |
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|
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// *************** Internal functions for sample decopmression *************** |
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// * |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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int y, dy, ddy; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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case 4: // 24 bit compressed to 12 bit |
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GET_PARAMS(params); |
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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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} |
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if (currentframeoffset) { |
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SKIP_ONE(get12lo(pSrc)); |
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currentframeoffset--; |
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if (copysamples) { |
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COPY_ONE(get12hi(pSrc)); |
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pSrc += 3; |
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copysamples--; |
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} |
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} |
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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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} |
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if (copysamples) { |
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COPY_ONE(get12lo(pSrc)); |
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} |
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break; |
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|
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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--; |
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} |
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while (copysamples) { |
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COPY_ONE(int8_t(*pSrc++)); |
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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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|
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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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|
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|
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// *************** Sample *************** |
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// * |
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|
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unsigned int Sample::Instances = 0; |
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buffer_t Sample::InternalDecompressionBuffer; |
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|
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Sample::Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset) : DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) { |
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Instances++; |
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|
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RIFF::Chunk* _3gix = waveList->GetSubChunk(CHUNK_ID_3GIX); |
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if (!_3gix) throw gig::Exception("Mandatory chunks in <wave> list chunk not found."); |
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SampleGroup = _3gix->ReadInt16(); |
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|
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RIFF::Chunk* smpl = waveList->GetSubChunk(CHUNK_ID_SMPL); |
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if (!smpl) throw gig::Exception("Mandatory chunks in <wave> list chunk not found."); |
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Manufacturer = smpl->ReadInt32(); |
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Product = smpl->ReadInt32(); |
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SamplePeriod = smpl->ReadInt32(); |
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MIDIUnityNote = smpl->ReadInt32(); |
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FineTune = smpl->ReadInt32(); |
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smpl->Read(&SMPTEFormat, 1, 4); |
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SMPTEOffset = smpl->ReadInt32(); |
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Loops = smpl->ReadInt32(); |
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smpl->ReadInt32(); // manufByt |
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LoopID = smpl->ReadInt32(); |
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smpl->Read(&LoopType, 1, 4); |
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LoopStart = smpl->ReadInt32(); |
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LoopEnd = smpl->ReadInt32(); |
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LoopFraction = smpl->ReadInt32(); |
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LoopPlayCount = smpl->ReadInt32(); |
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|
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FrameTable = NULL; |
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SamplePos = 0; |
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RAMCache.Size = 0; |
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RAMCache.pStart = NULL; |
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RAMCache.NullExtensionSize = 0; |
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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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|
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Compressed = (waveList->GetSubChunk(CHUNK_ID_EWAV)); |
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if (Compressed) { |
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ScanCompressedSample(); |
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} |
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|
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// we use a buffer for decompression and for truncating 24 bit samples to 16 bit |
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if ((Compressed || BitDepth == 24) && !InternalDecompressionBuffer.Size) { |
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InternalDecompressionBuffer.pStart = new unsigned char[INITIAL_SAMPLE_BUFFER_SIZE]; |
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InternalDecompressionBuffer.Size = INITIAL_SAMPLE_BUFFER_SIZE; |
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} |
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FrameOffset = 0; // just for streaming compressed samples |
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|
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LoopSize = LoopEnd - LoopStart; |
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} |
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|
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/// Scans compressed samples for mandatory informations (e.g. actual number of total sample points). |
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void Sample::ScanCompressedSample() { |
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//TODO: we have to add some more scans here (e.g. determine compression rate) |
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this->SamplesTotal = 0; |
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std::list<unsigned long> frameOffsets; |
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|
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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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|
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// Scanning |
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pCkData->SetPos(0); |
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if (Channels == 2) { // Stereo |
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for (int i = 0 ; ; i++) { |
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// for 24 bit samples every 8:th frame offset is |
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// stored, to save some memory |
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if (BitDepth != 24 || (i & 7) == 0) frameOffsets.push_back(pCkData->GetPos()); |
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|
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const int mode_l = pCkData->ReadUint8(); |
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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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|
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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; |
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break; |
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} |
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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()); |
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|
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const int mode = pCkData->ReadUint8(); |
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if (mode > 5) throw gig::Exception("Unknown compression mode"); |
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const unsigned long frameSize = bytesPerFrame[mode]; |
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|
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if (pCkData->RemainingBytes() <= frameSize) { |
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SamplesInLastFrame = |
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((pCkData->RemainingBytes() - headerSize[mode]) << 3) / bitsPerSample[mode]; |
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SamplesTotal += SamplesInLastFrame; |
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break; |
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} |
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SamplesTotal += SamplesPerFrame; |
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pCkData->SetPos(frameSize, RIFF::stream_curpos); |
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} |
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} |
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pCkData->SetPos(0); |
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|
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// Build the frames table (which is used for fast resolving of a frame's chunk offset) |
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if (FrameTable) delete[] FrameTable; |
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FrameTable = new unsigned long[frameOffsets.size()]; |
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std::list<unsigned long>::iterator end = frameOffsets.end(); |
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std::list<unsigned long>::iterator iter = frameOffsets.begin(); |
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for (int i = 0; iter != end; i++, iter++) { |
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FrameTable[i] = *iter; |
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} |
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} |
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|
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/** |
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* Loads (and uncompresses if needed) the whole sample wave into RAM. Use |
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* ReleaseSampleData() to free the memory if you don't need the cached |
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* sample data anymore. |
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* |
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* @returns buffer_t structure with start address and size of the buffer |
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* in bytes |
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* @see ReleaseSampleData(), Read(), SetPos() |
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*/ |
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buffer_t Sample::LoadSampleData() { |
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return LoadSampleDataWithNullSamplesExtension(this->SamplesTotal, 0); // 0 amount of NullSamples |
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} |
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|
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/** |
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* Reads (uncompresses if needed) and caches the first \a SampleCount |
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* numbers of SamplePoints in RAM. Use ReleaseSampleData() to free the |
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* memory space if you don't need the cached samples anymore. There is no |
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* guarantee that exactly \a SampleCount samples will be cached; this is |
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* not an error. The size will be eventually truncated e.g. to the |
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* beginning of a frame of a compressed sample. This is done for |
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* efficiency reasons while streaming the wave by your sampler engine |
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* later. Read the <i>Size</i> member of the <i>buffer_t</i> structure |
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* 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 |
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* samples by dividing it by the frame size of the sample: |
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* @code |
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* buffer_t buf = pSample->LoadSampleData(acquired_samples); |
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* long cachedsamples = buf.Size / pSample->FrameSize; |
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* @endcode |
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* |
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* @param SampleCount - number of sample points to load into RAM |
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* @returns buffer_t structure with start address and size of |
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* the cached sample data in bytes |
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* @see ReleaseSampleData(), Read(), SetPos() |
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*/ |
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buffer_t Sample::LoadSampleData(unsigned long SampleCount) { |
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return LoadSampleDataWithNullSamplesExtension(SampleCount, 0); // 0 amount of NullSamples |
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} |
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|
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/** |
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* Loads (and uncompresses if needed) the whole sample wave into RAM. Use |
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* ReleaseSampleData() to free the memory if you don't need the cached |
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* sample data anymore. |
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* The method will add \a NullSamplesCount silence samples past the |
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* official buffer end (this won't affect the 'Size' member of the |
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* buffer_t structure, that means 'Size' always reflects the size of the |
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* actual sample data, the buffer might be bigger though). Silence |
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* samples past the official buffer are needed for differential |
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* algorithms that always have to take subsequent samples into account |
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* (resampling/interpolation would be an important example) and avoids |
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* memory access faults in such cases. |
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* |
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* @param NullSamplesCount - number of silence samples the buffer should |
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* be extended past it's data end |
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* @returns buffer_t structure with start address and |
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* size of the buffer in bytes |
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* @see ReleaseSampleData(), Read(), SetPos() |
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*/ |
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buffer_t Sample::LoadSampleDataWithNullSamplesExtension(uint NullSamplesCount) { |
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return LoadSampleDataWithNullSamplesExtension(this->SamplesTotal, NullSamplesCount); |
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} |
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|
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/** |
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* Reads (uncompresses if needed) and caches the first \a SampleCount |
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* numbers of SamplePoints in RAM. Use ReleaseSampleData() to free the |
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* memory space if you don't need the cached samples anymore. There is no |
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* guarantee that exactly \a SampleCount samples will be cached; this is |
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* not an error. The size will be eventually truncated e.g. to the |
388 |
* beginning of a frame of a compressed sample. This is done for |
389 |
* efficiency reasons while streaming the wave by your sampler engine |
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* later. Read the <i>Size</i> member of the <i>buffer_t</i> structure |
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* 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 |
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* samples by dividing it by the frame size of the sample: |
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* @code |
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* buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(acquired_samples, null_samples); |
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* long cachedsamples = buf.Size / pSample->FrameSize; |
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* @endcode |
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* The method will add \a NullSamplesCount silence samples past the |
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* 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 |
401 |
* actual sample data, the buffer might be bigger though). Silence |
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* samples past the official buffer are needed for differential |
403 |
* algorithms that always have to take subsequent samples into account |
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* (resampling/interpolation would be an important example) and avoids |
405 |
* memory access faults in such cases. |
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* |
407 |
* @param SampleCount - number of sample points to load into RAM |
408 |
* @param NullSamplesCount - number of silence samples the buffer should |
409 |
* be extended past it's data end |
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* @returns buffer_t structure with start address and |
411 |
* size of the cached sample data in bytes |
412 |
* @see ReleaseSampleData(), Read(), SetPos() |
413 |
*/ |
414 |
buffer_t Sample::LoadSampleDataWithNullSamplesExtension(unsigned long SampleCount, uint NullSamplesCount) { |
415 |
if (SampleCount > this->SamplesTotal) SampleCount = this->SamplesTotal; |
416 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
417 |
unsigned long allocationsize = (SampleCount + NullSamplesCount) * this->FrameSize; |
418 |
RAMCache.pStart = new int8_t[allocationsize]; |
419 |
RAMCache.Size = Read(RAMCache.pStart, SampleCount) * this->FrameSize; |
420 |
RAMCache.NullExtensionSize = allocationsize - RAMCache.Size; |
421 |
// fill the remaining buffer space with silence samples |
422 |
memset((int8_t*)RAMCache.pStart + RAMCache.Size, 0, RAMCache.NullExtensionSize); |
423 |
return GetCache(); |
424 |
} |
425 |
|
426 |
/** |
427 |
* Returns current cached sample points. A buffer_t structure will be |
428 |
* returned which contains address pointer to the begin of the cache and |
429 |
* the size of the cached sample data in bytes. Use |
430 |
* <i>LoadSampleData()</i> to cache a specific amount of sample points in |
431 |
* RAM. |
432 |
* |
433 |
* @returns buffer_t structure with current cached sample points |
434 |
* @see LoadSampleData(); |
435 |
*/ |
436 |
buffer_t Sample::GetCache() { |
437 |
// return a copy of the buffer_t structure |
438 |
buffer_t result; |
439 |
result.Size = this->RAMCache.Size; |
440 |
result.pStart = this->RAMCache.pStart; |
441 |
result.NullExtensionSize = this->RAMCache.NullExtensionSize; |
442 |
return result; |
443 |
} |
444 |
|
445 |
/** |
446 |
* Frees the cached sample from RAM if loaded with |
447 |
* <i>LoadSampleData()</i> previously. |
448 |
* |
449 |
* @see LoadSampleData(); |
450 |
*/ |
451 |
void Sample::ReleaseSampleData() { |
452 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
453 |
RAMCache.pStart = NULL; |
454 |
RAMCache.Size = 0; |
455 |
} |
456 |
|
457 |
/** |
458 |
* Sets the position within the sample (in sample points, not in |
459 |
* bytes). Use this method and <i>Read()</i> if you don't want to load |
460 |
* the sample into RAM, thus for disk streaming. |
461 |
* |
462 |
* Although the original Gigasampler engine doesn't allow positioning |
463 |
* within compressed samples, I decided to implement it. Even though |
464 |
* the Gigasampler format doesn't allow to define loops for compressed |
465 |
* samples at the moment, positioning within compressed samples might be |
466 |
* interesting for some sampler engines though. The only drawback about |
467 |
* my decision is that it takes longer to load compressed gig Files on |
468 |
* startup, because it's neccessary to scan the samples for some |
469 |
* mandatory informations. But I think as it doesn't affect the runtime |
470 |
* efficiency, nobody will have a problem with that. |
471 |
* |
472 |
* @param SampleCount number of sample points to jump |
473 |
* @param Whence optional: to which relation \a SampleCount refers |
474 |
* to, if omited <i>RIFF::stream_start</i> is assumed |
475 |
* @returns the new sample position |
476 |
* @see Read() |
477 |
*/ |
478 |
unsigned long Sample::SetPos(unsigned long SampleCount, RIFF::stream_whence_t Whence) { |
479 |
if (Compressed) { |
480 |
switch (Whence) { |
481 |
case RIFF::stream_curpos: |
482 |
this->SamplePos += SampleCount; |
483 |
break; |
484 |
case RIFF::stream_end: |
485 |
this->SamplePos = this->SamplesTotal - 1 - SampleCount; |
486 |
break; |
487 |
case RIFF::stream_backward: |
488 |
this->SamplePos -= SampleCount; |
489 |
break; |
490 |
case RIFF::stream_start: default: |
491 |
this->SamplePos = SampleCount; |
492 |
break; |
493 |
} |
494 |
if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal; |
495 |
|
496 |
unsigned long frame = this->SamplePos / 2048; // to which frame to jump |
497 |
this->FrameOffset = this->SamplePos % 2048; // offset (in sample points) within that frame |
498 |
pCkData->SetPos(FrameTable[frame]); // set chunk pointer to the start of sought frame |
499 |
return this->SamplePos; |
500 |
} |
501 |
else { // not compressed |
502 |
unsigned long orderedBytes = SampleCount * this->FrameSize; |
503 |
unsigned long result = pCkData->SetPos(orderedBytes, Whence); |
504 |
return (result == orderedBytes) ? SampleCount |
505 |
: result / this->FrameSize; |
506 |
} |
507 |
} |
508 |
|
509 |
/** |
510 |
* Returns the current position in the sample (in sample points). |
511 |
*/ |
512 |
unsigned long Sample::GetPos() { |
513 |
if (Compressed) return SamplePos; |
514 |
else return pCkData->GetPos() / FrameSize; |
515 |
} |
516 |
|
517 |
/** |
518 |
* Reads \a SampleCount number of sample points from the position stored |
519 |
* in \a pPlaybackState into the buffer pointed by \a pBuffer and moves |
520 |
* the position within the sample respectively, this method honors the |
521 |
* looping informations of the sample (if any). The sample wave stream |
522 |
* will be decompressed on the fly if using a compressed sample. Use this |
523 |
* method if you don't want to load the sample into RAM, thus for disk |
524 |
* streaming. All this methods needs to know to proceed with streaming |
525 |
* 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 |
527 |
* yourself before you use it to stream a sample: |
528 |
* @code |
529 |
* gig::playback_state_t playbackstate; |
530 |
* playbackstate.position = 0; |
531 |
* playbackstate.reverse = false; |
532 |
* playbackstate.loop_cycles_left = pSample->LoopPlayCount; |
533 |
* @endcode |
534 |
* 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. |
536 |
* The method already handles such cases by itself. |
537 |
* |
538 |
* <b>Caution:</b> If you are using more than one streaming thread, you |
539 |
* have to use an external decompression buffer for <b>EACH</b> |
540 |
* streaming thread to avoid race conditions and crashes! |
541 |
* |
542 |
* @param pBuffer destination buffer |
543 |
* @param SampleCount number of sample points to read |
544 |
* @param pPlaybackState will be used to store and reload the playback |
545 |
* state for the next ReadAndLoop() call |
546 |
* @param pExternalDecompressionBuffer (optional) external buffer to use for decompression |
547 |
* @returns number of successfully read sample points |
548 |
* @see CreateDecompressionBuffer() |
549 |
*/ |
550 |
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; |
552 |
uint8_t* pDst = (uint8_t*) pBuffer; |
553 |
|
554 |
SetPos(pPlaybackState->position); // recover position from the last time |
555 |
|
556 |
if (this->Loops && GetPos() <= this->LoopEnd) { // honor looping if there are loop points defined |
557 |
|
558 |
switch (this->LoopType) { |
559 |
|
560 |
case loop_type_bidirectional: { //TODO: not tested yet! |
561 |
do { |
562 |
// if not endless loop check if max. number of loop cycles have been passed |
563 |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
564 |
|
565 |
if (!pPlaybackState->reverse) { // forward playback |
566 |
do { |
567 |
samplestoloopend = this->LoopEnd - GetPos(); |
568 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
569 |
samplestoread -= readsamples; |
570 |
totalreadsamples += readsamples; |
571 |
if (readsamples == samplestoloopend) { |
572 |
pPlaybackState->reverse = true; |
573 |
break; |
574 |
} |
575 |
} while (samplestoread && readsamples); |
576 |
} |
577 |
else { // backward playback |
578 |
|
579 |
// as we can only read forward from disk, we have to |
580 |
// determine the end position within the loop first, |
581 |
// read forward from that 'end' and finally after |
582 |
// reading, swap all sample frames so it reflects |
583 |
// backward playback |
584 |
|
585 |
unsigned long swapareastart = totalreadsamples; |
586 |
unsigned long loopoffset = GetPos() - this->LoopStart; |
587 |
unsigned long samplestoreadinloop = Min(samplestoread, loopoffset); |
588 |
unsigned long reverseplaybackend = GetPos() - samplestoreadinloop; |
589 |
|
590 |
SetPos(reverseplaybackend); |
591 |
|
592 |
// read samples for backward playback |
593 |
do { |
594 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoreadinloop, pExternalDecompressionBuffer); |
595 |
samplestoreadinloop -= readsamples; |
596 |
samplestoread -= readsamples; |
597 |
totalreadsamples += readsamples; |
598 |
} while (samplestoreadinloop && readsamples); |
599 |
|
600 |
SetPos(reverseplaybackend); // pretend we really read backwards |
601 |
|
602 |
if (reverseplaybackend == this->LoopStart) { |
603 |
pPlaybackState->loop_cycles_left--; |
604 |
pPlaybackState->reverse = false; |
605 |
} |
606 |
|
607 |
// reverse the sample frames for backward playback |
608 |
SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize); |
609 |
} |
610 |
} while (samplestoread && readsamples); |
611 |
break; |
612 |
} |
613 |
|
614 |
case loop_type_backward: { // TODO: not tested yet! |
615 |
// forward playback (not entered the loop yet) |
616 |
if (!pPlaybackState->reverse) do { |
617 |
samplestoloopend = this->LoopEnd - GetPos(); |
618 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
619 |
samplestoread -= readsamples; |
620 |
totalreadsamples += readsamples; |
621 |
if (readsamples == samplestoloopend) { |
622 |
pPlaybackState->reverse = true; |
623 |
break; |
624 |
} |
625 |
} while (samplestoread && readsamples); |
626 |
|
627 |
if (!samplestoread) break; |
628 |
|
629 |
// as we can only read forward from disk, we have to |
630 |
// determine the end position within the loop first, |
631 |
// read forward from that 'end' and finally after |
632 |
// reading, swap all sample frames so it reflects |
633 |
// backward playback |
634 |
|
635 |
unsigned long swapareastart = totalreadsamples; |
636 |
unsigned long loopoffset = GetPos() - this->LoopStart; |
637 |
unsigned long samplestoreadinloop = (this->LoopPlayCount) ? Min(samplestoread, pPlaybackState->loop_cycles_left * LoopSize - loopoffset) |
638 |
: samplestoread; |
639 |
unsigned long reverseplaybackend = this->LoopStart + Abs((loopoffset - samplestoreadinloop) % this->LoopSize); |
640 |
|
641 |
SetPos(reverseplaybackend); |
642 |
|
643 |
// read samples for backward playback |
644 |
do { |
645 |
// if not endless loop check if max. number of loop cycles have been passed |
646 |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
647 |
samplestoloopend = this->LoopEnd - GetPos(); |
648 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoreadinloop, samplestoloopend), pExternalDecompressionBuffer); |
649 |
samplestoreadinloop -= readsamples; |
650 |
samplestoread -= readsamples; |
651 |
totalreadsamples += readsamples; |
652 |
if (readsamples == samplestoloopend) { |
653 |
pPlaybackState->loop_cycles_left--; |
654 |
SetPos(this->LoopStart); |
655 |
} |
656 |
} while (samplestoreadinloop && readsamples); |
657 |
|
658 |
SetPos(reverseplaybackend); // pretend we really read backwards |
659 |
|
660 |
// reverse the sample frames for backward playback |
661 |
SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize); |
662 |
break; |
663 |
} |
664 |
|
665 |
default: case loop_type_normal: { |
666 |
do { |
667 |
// if not endless loop check if max. number of loop cycles have been passed |
668 |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
669 |
samplestoloopend = this->LoopEnd - GetPos(); |
670 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
671 |
samplestoread -= readsamples; |
672 |
totalreadsamples += readsamples; |
673 |
if (readsamples == samplestoloopend) { |
674 |
pPlaybackState->loop_cycles_left--; |
675 |
SetPos(this->LoopStart); |
676 |
} |
677 |
} while (samplestoread && readsamples); |
678 |
break; |
679 |
} |
680 |
} |
681 |
} |
682 |
|
683 |
// read on without looping |
684 |
if (samplestoread) do { |
685 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoread, pExternalDecompressionBuffer); |
686 |
samplestoread -= readsamples; |
687 |
totalreadsamples += readsamples; |
688 |
} while (readsamples && samplestoread); |
689 |
|
690 |
// store current position |
691 |
pPlaybackState->position = GetPos(); |
692 |
|
693 |
return totalreadsamples; |
694 |
} |
695 |
|
696 |
/** |
697 |
* Reads \a SampleCount number of sample points from the current |
698 |
* position into the buffer pointed by \a pBuffer and increments the |
699 |
* position within the sample. The sample wave stream will be |
700 |
* decompressed on the fly if using a compressed sample. Use this method |
701 |
* and <i>SetPos()</i> if you don't want to load the sample into RAM, |
702 |
* 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 |
709 |
* @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 |
712 |
* @see SetPos(), CreateDecompressionBuffer() |
713 |
*/ |
714 |
unsigned long Sample::Read(void* pBuffer, unsigned long SampleCount, buffer_t* pExternalDecompressionBuffer) { |
715 |
if (SampleCount == 0) return 0; |
716 |
if (!Compressed) { |
717 |
if (BitDepth == 24) { |
718 |
// 24 bit sample. For now just truncate to 16 bit. |
719 |
unsigned char* pSrc = (unsigned char*) ((pExternalDecompressionBuffer) ? pExternalDecompressionBuffer->pStart : this->InternalDecompressionBuffer.pStart); |
720 |
int16_t* pDst = static_cast<int16_t*>(pBuffer); |
721 |
if (Channels == 2) { // Stereo |
722 |
unsigned long readBytes = pCkData->Read(pSrc, SampleCount * 6, 1); |
723 |
pSrc++; |
724 |
for (unsigned long i = readBytes ; i > 0 ; i -= 3) { |
725 |
*pDst++ = get16(pSrc); |
726 |
pSrc += 3; |
727 |
} |
728 |
return (pDst - static_cast<int16_t*>(pBuffer)) >> 1; |
729 |
} |
730 |
else { // Mono |
731 |
unsigned long readBytes = pCkData->Read(pSrc, SampleCount * 3, 1); |
732 |
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 { |
747 |
if (this->SamplePos >= this->SamplesTotal) return 0; |
748 |
//TODO: efficiency: maybe we should test for an average compression rate |
749 |
unsigned long assumedsize = GuessSize(SampleCount), |
750 |
remainingbytes = 0, // remaining bytes in the local buffer |
751 |
remainingsamples = SampleCount, |
752 |
copysamples, skipsamples, |
753 |
currentframeoffset = this->FrameOffset; // offset in current sample frame since last Read() |
754 |
this->FrameOffset = 0; |
755 |
|
756 |
buffer_t* pDecompressionBuffer = (pExternalDecompressionBuffer) ? pExternalDecompressionBuffer : &InternalDecompressionBuffer; |
757 |
|
758 |
// if decompression buffer too small, then reduce amount of samples to read |
759 |
if (pDecompressionBuffer->Size < assumedsize) { |
760 |
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 |
unsigned char* pSrc = (unsigned char*) pDecompressionBuffer->pStart; |
767 |
int16_t* pDst = static_cast<int16_t*>(pBuffer); |
768 |
remainingbytes = pCkData->Read(pSrc, assumedsize, 1); |
769 |
|
770 |
while (remainingsamples && remainingbytes) { |
771 |
unsigned long framesamples = SamplesPerFrame; |
772 |
unsigned long framebytes, rightChannelOffset = 0, nextFrameOffset; |
773 |
|
774 |
int mode_l = *pSrc++, mode_r = 0; |
775 |
|
776 |
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 |
} |
797 |
} |
798 |
|
799 |
// determine how many samples in this frame to skip and read |
800 |
if (currentframeoffset + remainingsamples >= framesamples) { |
801 |
if (currentframeoffset <= framesamples) { |
802 |
copysamples = framesamples - currentframeoffset; |
803 |
skipsamples = currentframeoffset; |
804 |
} |
805 |
else { |
806 |
copysamples = 0; |
807 |
skipsamples = framesamples; |
808 |
} |
809 |
} |
810 |
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; |
815 |
skipsamples = currentframeoffset; |
816 |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
817 |
this->FrameOffset = currentframeoffset + copysamples; |
818 |
} |
819 |
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); |
830 |
} |
831 |
} |
832 |
else remainingbytes = 0; |
833 |
|
834 |
currentframeoffset -= skipsamples; |
835 |
|
836 |
if (copysamples == 0) { |
837 |
// skip this frame |
838 |
pSrc += framebytes - Channels; |
839 |
} |
840 |
else { |
841 |
const unsigned char* const param_l = pSrc; |
842 |
if (BitDepth == 24) { |
843 |
if (mode_l != 2) pSrc += 12; |
844 |
|
845 |
if (Channels == 2) { // Stereo |
846 |
const unsigned char* const param_r = pSrc; |
847 |
if (mode_r != 2) pSrc += 12; |
848 |
|
849 |
Decompress24(mode_l, param_l, 2, pSrc, pDst, skipsamples, copysamples); |
850 |
Decompress24(mode_r, param_r, 2, pSrc + rightChannelOffset, pDst + 1, |
851 |
skipsamples, copysamples); |
852 |
pDst += copysamples << 1; |
853 |
} |
854 |
else { // Mono |
855 |
Decompress24(mode_l, param_l, 1, pSrc, pDst, skipsamples, copysamples); |
856 |
pDst += copysamples; |
857 |
} |
858 |
} |
859 |
else { // 16 bit |
860 |
if (mode_l) pSrc += 4; |
861 |
|
862 |
int step; |
863 |
if (Channels == 2) { // Stereo |
864 |
const unsigned char* const param_r = pSrc; |
865 |
if (mode_r) pSrc += 4; |
866 |
|
867 |
step = (2 - mode_l) + (2 - mode_r); |
868 |
Decompress16(mode_l, param_l, step, 2, pSrc, pDst, skipsamples, copysamples); |
869 |
Decompress16(mode_r, param_r, step, 2, pSrc + (2 - mode_l), pDst + 1, |
870 |
skipsamples, copysamples); |
871 |
pDst += copysamples << 1; |
872 |
} |
873 |
else { // Mono |
874 |
step = 2 - mode_l; |
875 |
Decompress16(mode_l, param_l, step, 1, pSrc, pDst, skipsamples, copysamples); |
876 |
pDst += copysamples; |
877 |
} |
878 |
} |
879 |
pSrc += nextFrameOffset; |
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); |
893 |
if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal; |
894 |
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() { |
941 |
Instances--; |
942 |
if (!Instances && InternalDecompressionBuffer.Size) { |
943 |
delete[] (unsigned char*) InternalDecompressionBuffer.pStart; |
944 |
InternalDecompressionBuffer.pStart = NULL; |
945 |
InternalDecompressionBuffer.Size = 0; |
946 |
} |
947 |
if (FrameTable) delete[] FrameTable; |
948 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
949 |
} |
950 |
|
951 |
|
952 |
|
953 |
// *************** DimensionRegion *************** |
954 |
// * |
955 |
|
956 |
uint DimensionRegion::Instances = 0; |
957 |
DimensionRegion::VelocityTableMap* DimensionRegion::pVelocityTables = NULL; |
958 |
|
959 |
DimensionRegion::DimensionRegion(RIFF::List* _3ewl) : DLS::Sampler(_3ewl) { |
960 |
Instances++; |
961 |
|
962 |
memcpy(&Crossfade, &SamplerOptions, 4); |
963 |
if (!pVelocityTables) pVelocityTables = new VelocityTableMap; |
964 |
|
965 |
RIFF::Chunk* _3ewa = _3ewl->GetSubChunk(CHUNK_ID_3EWA); |
966 |
_3ewa->ReadInt32(); // unknown, always 0x0000008C ? |
967 |
LFO3Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
968 |
EG3Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
969 |
_3ewa->ReadInt16(); // unknown |
970 |
LFO1InternalDepth = _3ewa->ReadUint16(); |
971 |
_3ewa->ReadInt16(); // unknown |
972 |
LFO3InternalDepth = _3ewa->ReadInt16(); |
973 |
_3ewa->ReadInt16(); // unknown |
974 |
LFO1ControlDepth = _3ewa->ReadUint16(); |
975 |
_3ewa->ReadInt16(); // unknown |
976 |
LFO3ControlDepth = _3ewa->ReadInt16(); |
977 |
EG1Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
978 |
EG1Decay1 = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
979 |
_3ewa->ReadInt16(); // unknown |
980 |
EG1Sustain = _3ewa->ReadUint16(); |
981 |
EG1Release = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
982 |
EG1Controller = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8())); |
983 |
uint8_t eg1ctrloptions = _3ewa->ReadUint8(); |
984 |
EG1ControllerInvert = eg1ctrloptions & 0x01; |
985 |
EG1ControllerAttackInfluence = GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(eg1ctrloptions); |
986 |
EG1ControllerDecayInfluence = GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(eg1ctrloptions); |
987 |
EG1ControllerReleaseInfluence = GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(eg1ctrloptions); |
988 |
EG2Controller = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8())); |
989 |
uint8_t eg2ctrloptions = _3ewa->ReadUint8(); |
990 |
EG2ControllerInvert = eg2ctrloptions & 0x01; |
991 |
EG2ControllerAttackInfluence = GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(eg2ctrloptions); |
992 |
EG2ControllerDecayInfluence = GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(eg2ctrloptions); |
993 |
EG2ControllerReleaseInfluence = GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(eg2ctrloptions); |
994 |
LFO1Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
995 |
EG2Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
996 |
EG2Decay1 = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
997 |
_3ewa->ReadInt16(); // unknown |
998 |
EG2Sustain = _3ewa->ReadUint16(); |
999 |
EG2Release = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1000 |
_3ewa->ReadInt16(); // unknown |
1001 |
LFO2ControlDepth = _3ewa->ReadUint16(); |
1002 |
LFO2Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1003 |
_3ewa->ReadInt16(); // unknown |
1004 |
LFO2InternalDepth = _3ewa->ReadUint16(); |
1005 |
int32_t eg1decay2 = _3ewa->ReadInt32(); |
1006 |
EG1Decay2 = (double) GIG_EXP_DECODE(eg1decay2); |
1007 |
EG1InfiniteSustain = (eg1decay2 == 0x7fffffff); |
1008 |
_3ewa->ReadInt16(); // unknown |
1009 |
EG1PreAttack = _3ewa->ReadUint16(); |
1010 |
int32_t eg2decay2 = _3ewa->ReadInt32(); |
1011 |
EG2Decay2 = (double) GIG_EXP_DECODE(eg2decay2); |
1012 |
EG2InfiniteSustain = (eg2decay2 == 0x7fffffff); |
1013 |
_3ewa->ReadInt16(); // unknown |
1014 |
EG2PreAttack = _3ewa->ReadUint16(); |
1015 |
uint8_t velocityresponse = _3ewa->ReadUint8(); |
1016 |
if (velocityresponse < 5) { |
1017 |
VelocityResponseCurve = curve_type_nonlinear; |
1018 |
VelocityResponseDepth = velocityresponse; |
1019 |
} |
1020 |
else if (velocityresponse < 10) { |
1021 |
VelocityResponseCurve = curve_type_linear; |
1022 |
VelocityResponseDepth = velocityresponse - 5; |
1023 |
} |
1024 |
else if (velocityresponse < 15) { |
1025 |
VelocityResponseCurve = curve_type_special; |
1026 |
VelocityResponseDepth = velocityresponse - 10; |
1027 |
} |
1028 |
else { |
1029 |
VelocityResponseCurve = curve_type_unknown; |
1030 |
VelocityResponseDepth = 0; |
1031 |
} |
1032 |
uint8_t releasevelocityresponse = _3ewa->ReadUint8(); |
1033 |
if (releasevelocityresponse < 5) { |
1034 |
ReleaseVelocityResponseCurve = curve_type_nonlinear; |
1035 |
ReleaseVelocityResponseDepth = releasevelocityresponse; |
1036 |
} |
1037 |
else if (releasevelocityresponse < 10) { |
1038 |
ReleaseVelocityResponseCurve = curve_type_linear; |
1039 |
ReleaseVelocityResponseDepth = releasevelocityresponse - 5; |
1040 |
} |
1041 |
else if (releasevelocityresponse < 15) { |
1042 |
ReleaseVelocityResponseCurve = curve_type_special; |
1043 |
ReleaseVelocityResponseDepth = releasevelocityresponse - 10; |
1044 |
} |
1045 |
else { |
1046 |
ReleaseVelocityResponseCurve = curve_type_unknown; |
1047 |
ReleaseVelocityResponseDepth = 0; |
1048 |
} |
1049 |
VelocityResponseCurveScaling = _3ewa->ReadUint8(); |
1050 |
AttenuationControllerThreshold = _3ewa->ReadInt8(); |
1051 |
_3ewa->ReadInt32(); // unknown |
1052 |
SampleStartOffset = (uint16_t) _3ewa->ReadInt16(); |
1053 |
_3ewa->ReadInt16(); // unknown |
1054 |
uint8_t pitchTrackDimensionBypass = _3ewa->ReadInt8(); |
1055 |
PitchTrack = GIG_PITCH_TRACK_EXTRACT(pitchTrackDimensionBypass); |
1056 |
if (pitchTrackDimensionBypass & 0x10) DimensionBypass = dim_bypass_ctrl_94; |
1057 |
else if (pitchTrackDimensionBypass & 0x20) DimensionBypass = dim_bypass_ctrl_95; |
1058 |
else DimensionBypass = dim_bypass_ctrl_none; |
1059 |
uint8_t pan = _3ewa->ReadUint8(); |
1060 |
Pan = (pan < 64) ? pan : -((int)pan - 63); // signed 7 bit -> signed 8 bit |
1061 |
SelfMask = _3ewa->ReadInt8() & 0x01; |
1062 |
_3ewa->ReadInt8(); // unknown |
1063 |
uint8_t lfo3ctrl = _3ewa->ReadUint8(); |
1064 |
LFO3Controller = static_cast<lfo3_ctrl_t>(lfo3ctrl & 0x07); // lower 3 bits |
1065 |
LFO3Sync = lfo3ctrl & 0x20; // bit 5 |
1066 |
InvertAttenuationController = lfo3ctrl & 0x80; // bit 7 |
1067 |
AttenuationController = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8())); |
1068 |
uint8_t lfo2ctrl = _3ewa->ReadUint8(); |
1069 |
LFO2Controller = static_cast<lfo2_ctrl_t>(lfo2ctrl & 0x07); // lower 3 bits |
1070 |
LFO2FlipPhase = lfo2ctrl & 0x80; // bit 7 |
1071 |
LFO2Sync = lfo2ctrl & 0x20; // bit 5 |
1072 |
bool extResonanceCtrl = lfo2ctrl & 0x40; // bit 6 |
1073 |
uint8_t lfo1ctrl = _3ewa->ReadUint8(); |
1074 |
LFO1Controller = static_cast<lfo1_ctrl_t>(lfo1ctrl & 0x07); // lower 3 bits |
1075 |
LFO1FlipPhase = lfo1ctrl & 0x80; // bit 7 |
1076 |
LFO1Sync = lfo1ctrl & 0x40; // bit 6 |
1077 |
VCFResonanceController = (extResonanceCtrl) ? static_cast<vcf_res_ctrl_t>(GIG_VCF_RESONANCE_CTRL_EXTRACT(lfo1ctrl)) |
1078 |
: vcf_res_ctrl_none; |
1079 |
uint16_t eg3depth = _3ewa->ReadUint16(); |
1080 |
EG3Depth = (eg3depth <= 1200) ? eg3depth /* positives */ |
1081 |
: (-1) * (int16_t) ((eg3depth ^ 0xffff) + 1); /* binary complementary for negatives */ |
1082 |
_3ewa->ReadInt16(); // unknown |
1083 |
ChannelOffset = _3ewa->ReadUint8() / 4; |
1084 |
uint8_t regoptions = _3ewa->ReadUint8(); |
1085 |
MSDecode = regoptions & 0x01; // bit 0 |
1086 |
SustainDefeat = regoptions & 0x02; // bit 1 |
1087 |
_3ewa->ReadInt16(); // unknown |
1088 |
VelocityUpperLimit = _3ewa->ReadInt8(); |
1089 |
_3ewa->ReadInt8(); // unknown |
1090 |
_3ewa->ReadInt16(); // unknown |
1091 |
ReleaseTriggerDecay = _3ewa->ReadUint8(); // release trigger decay |
1092 |
_3ewa->ReadInt8(); // unknown |
1093 |
_3ewa->ReadInt8(); // unknown |
1094 |
EG1Hold = _3ewa->ReadUint8() & 0x80; // bit 7 |
1095 |
uint8_t vcfcutoff = _3ewa->ReadUint8(); |
1096 |
VCFEnabled = vcfcutoff & 0x80; // bit 7 |
1097 |
VCFCutoff = vcfcutoff & 0x7f; // lower 7 bits |
1098 |
VCFCutoffController = static_cast<vcf_cutoff_ctrl_t>(_3ewa->ReadUint8()); |
1099 |
VCFVelocityScale = _3ewa->ReadUint8(); |
1100 |
_3ewa->ReadInt8(); // unknown |
1101 |
uint8_t vcfresonance = _3ewa->ReadUint8(); |
1102 |
VCFResonance = vcfresonance & 0x7f; // lower 7 bits |
1103 |
VCFResonanceDynamic = !(vcfresonance & 0x80); // bit 7 |
1104 |
uint8_t vcfbreakpoint = _3ewa->ReadUint8(); |
1105 |
VCFKeyboardTracking = vcfbreakpoint & 0x80; // bit 7 |
1106 |
VCFKeyboardTrackingBreakpoint = vcfbreakpoint & 0x7f; // lower 7 bits |
1107 |
uint8_t vcfvelocity = _3ewa->ReadUint8(); |
1108 |
VCFVelocityDynamicRange = vcfvelocity % 5; |
1109 |
VCFVelocityCurve = static_cast<curve_type_t>(vcfvelocity / 5); |
1110 |
VCFType = static_cast<vcf_type_t>(_3ewa->ReadUint8()); |
1111 |
if (VCFType == vcf_type_lowpass) { |
1112 |
if (lfo3ctrl & 0x40) // bit 6 |
1113 |
VCFType = vcf_type_lowpassturbo; |
1114 |
} |
1115 |
|
1116 |
// get the corresponding velocity->volume table from the table map or create & calculate that table if it doesn't exist yet |
1117 |
uint32_t tableKey = (VelocityResponseCurve<<16) | (VelocityResponseDepth<<8) | VelocityResponseCurveScaling; |
1118 |
if (pVelocityTables->count(tableKey)) { // if key exists |
1119 |
pVelocityAttenuationTable = (*pVelocityTables)[tableKey]; |
1120 |
} |
1121 |
else { |
1122 |
pVelocityAttenuationTable = |
1123 |
CreateVelocityTable(VelocityResponseCurve, |
1124 |
VelocityResponseDepth, |
1125 |
VelocityResponseCurveScaling); |
1126 |
(*pVelocityTables)[tableKey] = pVelocityAttenuationTable; // put the new table into the tables map |
1127 |
} |
1128 |
} |
1129 |
|
1130 |
leverage_ctrl_t DimensionRegion::DecodeLeverageController(_lev_ctrl_t EncodedController) { |
1131 |
leverage_ctrl_t decodedcontroller; |
1132 |
switch (EncodedController) { |
1133 |
// special controller |
1134 |
case _lev_ctrl_none: |
1135 |
decodedcontroller.type = leverage_ctrl_t::type_none; |
1136 |
decodedcontroller.controller_number = 0; |
1137 |
break; |
1138 |
case _lev_ctrl_velocity: |
1139 |
decodedcontroller.type = leverage_ctrl_t::type_velocity; |
1140 |
decodedcontroller.controller_number = 0; |
1141 |
break; |
1142 |
case _lev_ctrl_channelaftertouch: |
1143 |
decodedcontroller.type = leverage_ctrl_t::type_channelaftertouch; |
1144 |
decodedcontroller.controller_number = 0; |
1145 |
break; |
1146 |
|
1147 |
// ordinary MIDI control change controller |
1148 |
case _lev_ctrl_modwheel: |
1149 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1150 |
decodedcontroller.controller_number = 1; |
1151 |
break; |
1152 |
case _lev_ctrl_breath: |
1153 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1154 |
decodedcontroller.controller_number = 2; |
1155 |
break; |
1156 |
case _lev_ctrl_foot: |
1157 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1158 |
decodedcontroller.controller_number = 4; |
1159 |
break; |
1160 |
case _lev_ctrl_effect1: |
1161 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1162 |
decodedcontroller.controller_number = 12; |
1163 |
break; |
1164 |
case _lev_ctrl_effect2: |
1165 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1166 |
decodedcontroller.controller_number = 13; |
1167 |
break; |
1168 |
case _lev_ctrl_genpurpose1: |
1169 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1170 |
decodedcontroller.controller_number = 16; |
1171 |
break; |
1172 |
case _lev_ctrl_genpurpose2: |
1173 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1174 |
decodedcontroller.controller_number = 17; |
1175 |
break; |
1176 |
case _lev_ctrl_genpurpose3: |
1177 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1178 |
decodedcontroller.controller_number = 18; |
1179 |
break; |
1180 |
case _lev_ctrl_genpurpose4: |
1181 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1182 |
decodedcontroller.controller_number = 19; |
1183 |
break; |
1184 |
case _lev_ctrl_portamentotime: |
1185 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1186 |
decodedcontroller.controller_number = 5; |
1187 |
break; |
1188 |
case _lev_ctrl_sustainpedal: |
1189 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1190 |
decodedcontroller.controller_number = 64; |
1191 |
break; |
1192 |
case _lev_ctrl_portamento: |
1193 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1194 |
decodedcontroller.controller_number = 65; |
1195 |
break; |
1196 |
case _lev_ctrl_sostenutopedal: |
1197 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1198 |
decodedcontroller.controller_number = 66; |
1199 |
break; |
1200 |
case _lev_ctrl_softpedal: |
1201 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1202 |
decodedcontroller.controller_number = 67; |
1203 |
break; |
1204 |
case _lev_ctrl_genpurpose5: |
1205 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1206 |
decodedcontroller.controller_number = 80; |
1207 |
break; |
1208 |
case _lev_ctrl_genpurpose6: |
1209 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1210 |
decodedcontroller.controller_number = 81; |
1211 |
break; |
1212 |
case _lev_ctrl_genpurpose7: |
1213 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1214 |
decodedcontroller.controller_number = 82; |
1215 |
break; |
1216 |
case _lev_ctrl_genpurpose8: |
1217 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1218 |
decodedcontroller.controller_number = 83; |
1219 |
break; |
1220 |
case _lev_ctrl_effect1depth: |
1221 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1222 |
decodedcontroller.controller_number = 91; |
1223 |
break; |
1224 |
case _lev_ctrl_effect2depth: |
1225 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1226 |
decodedcontroller.controller_number = 92; |
1227 |
break; |
1228 |
case _lev_ctrl_effect3depth: |
1229 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1230 |
decodedcontroller.controller_number = 93; |
1231 |
break; |
1232 |
case _lev_ctrl_effect4depth: |
1233 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1234 |
decodedcontroller.controller_number = 94; |
1235 |
break; |
1236 |
case _lev_ctrl_effect5depth: |
1237 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1238 |
decodedcontroller.controller_number = 95; |
1239 |
break; |
1240 |
|
1241 |
// unknown controller type |
1242 |
default: |
1243 |
throw gig::Exception("Unknown leverage controller type."); |
1244 |
} |
1245 |
return decodedcontroller; |
1246 |
} |
1247 |
|
1248 |
DimensionRegion::~DimensionRegion() { |
1249 |
Instances--; |
1250 |
if (!Instances) { |
1251 |
// delete the velocity->volume tables |
1252 |
VelocityTableMap::iterator iter; |
1253 |
for (iter = pVelocityTables->begin(); iter != pVelocityTables->end(); iter++) { |
1254 |
double* pTable = iter->second; |
1255 |
if (pTable) delete[] pTable; |
1256 |
} |
1257 |
pVelocityTables->clear(); |
1258 |
delete pVelocityTables; |
1259 |
pVelocityTables = NULL; |
1260 |
} |
1261 |
} |
1262 |
|
1263 |
/** |
1264 |
* Returns the correct amplitude factor for the given \a MIDIKeyVelocity. |
1265 |
* All involved parameters (VelocityResponseCurve, VelocityResponseDepth |
1266 |
* and VelocityResponseCurveScaling) involved are taken into account to |
1267 |
* calculate the amplitude factor. Use this method when a key was |
1268 |
* triggered to get the volume with which the sample should be played |
1269 |
* back. |
1270 |
* |
1271 |
* @param MIDIKeyVelocity MIDI velocity value of the triggered key (between 0 and 127) |
1272 |
* @returns amplitude factor (between 0.0 and 1.0) |
1273 |
*/ |
1274 |
double DimensionRegion::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) { |
1275 |
return pVelocityAttenuationTable[MIDIKeyVelocity]; |
1276 |
} |
1277 |
|
1278 |
double* DimensionRegion::CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling) { |
1279 |
|
1280 |
// line-segment approximations of the 15 velocity curves |
1281 |
|
1282 |
// linear |
1283 |
const int lin0[] = { 1, 1, 127, 127 }; |
1284 |
const int lin1[] = { 1, 21, 127, 127 }; |
1285 |
const int lin2[] = { 1, 45, 127, 127 }; |
1286 |
const int lin3[] = { 1, 74, 127, 127 }; |
1287 |
const int lin4[] = { 1, 127, 127, 127 }; |
1288 |
|
1289 |
// non-linear |
1290 |
const int non0[] = { 1, 4, 24, 5, 57, 17, 92, 57, 122, 127, 127, 127 }; |
1291 |
const int non1[] = { 1, 4, 46, 9, 93, 56, 118, 106, 123, 127, |
1292 |
127, 127 }; |
1293 |
const int non2[] = { 1, 4, 46, 9, 57, 20, 102, 107, 107, 127, |
1294 |
127, 127 }; |
1295 |
const int non3[] = { 1, 15, 10, 19, 67, 73, 80, 80, 90, 98, 98, 127, |
1296 |
127, 127 }; |
1297 |
const int non4[] = { 1, 25, 33, 57, 82, 81, 92, 127, 127, 127 }; |
1298 |
|
1299 |
// special |
1300 |
const int spe0[] = { 1, 2, 76, 10, 90, 15, 95, 20, 99, 28, 103, 44, |
1301 |
113, 127, 127, 127 }; |
1302 |
const int spe1[] = { 1, 2, 27, 5, 67, 18, 89, 29, 95, 35, 107, 67, |
1303 |
118, 127, 127, 127 }; |
1304 |
const int spe2[] = { 1, 1, 33, 1, 53, 5, 61, 13, 69, 32, 79, 74, |
1305 |
85, 90, 91, 127, 127, 127 }; |
1306 |
const int spe3[] = { 1, 32, 28, 35, 66, 48, 89, 59, 95, 65, 99, 73, |
1307 |
117, 127, 127, 127 }; |
1308 |
const int spe4[] = { 1, 4, 23, 5, 49, 13, 57, 17, 92, 57, 122, 127, |
1309 |
127, 127 }; |
1310 |
|
1311 |
const int* const curves[] = { non0, non1, non2, non3, non4, |
1312 |
lin0, lin1, lin2, lin3, lin4, |
1313 |
spe0, spe1, spe2, spe3, spe4 }; |
1314 |
|
1315 |
double* const table = new double[128]; |
1316 |
|
1317 |
const int* curve = curves[curveType * 5 + depth]; |
1318 |
const int s = scaling == 0 ? 20 : scaling; // 0 or 20 means no scaling |
1319 |
|
1320 |
table[0] = 0; |
1321 |
for (int x = 1 ; x < 128 ; x++) { |
1322 |
|
1323 |
if (x > curve[2]) curve += 2; |
1324 |
double y = curve[1] + (x - curve[0]) * |
1325 |
(double(curve[3] - curve[1]) / (curve[2] - curve[0])); |
1326 |
y = y / 127; |
1327 |
|
1328 |
// Scale up for s > 20, down for s < 20. When |
1329 |
// down-scaling, the curve still ends at 1.0. |
1330 |
if (s < 20 && y >= 0.5) |
1331 |
y = y / ((2 - 40.0 / s) * y + 40.0 / s - 1); |
1332 |
else |
1333 |
y = y * (s / 20.0); |
1334 |
if (y > 1) y = 1; |
1335 |
|
1336 |
table[x] = y; |
1337 |
} |
1338 |
return table; |
1339 |
} |
1340 |
|
1341 |
|
1342 |
// *************** Region *************** |
1343 |
// * |
1344 |
|
1345 |
Region::Region(Instrument* pInstrument, RIFF::List* rgnList) : DLS::Region((DLS::Instrument*) pInstrument, rgnList) { |
1346 |
// Initialization |
1347 |
Dimensions = 0; |
1348 |
for (int i = 0; i < 256; i++) { |
1349 |
pDimensionRegions[i] = NULL; |
1350 |
} |
1351 |
Layers = 1; |
1352 |
File* file = (File*) GetParent()->GetParent(); |
1353 |
int dimensionBits = (file->pVersion && file->pVersion->major == 3) ? 8 : 5; |
1354 |
|
1355 |
// Actual Loading |
1356 |
|
1357 |
LoadDimensionRegions(rgnList); |
1358 |
|
1359 |
RIFF::Chunk* _3lnk = rgnList->GetSubChunk(CHUNK_ID_3LNK); |
1360 |
if (_3lnk) { |
1361 |
DimensionRegions = _3lnk->ReadUint32(); |
1362 |
for (int i = 0; i < dimensionBits; i++) { |
1363 |
dimension_t dimension = static_cast<dimension_t>(_3lnk->ReadUint8()); |
1364 |
uint8_t bits = _3lnk->ReadUint8(); |
1365 |
if (dimension == dimension_none) { // inactive dimension |
1366 |
pDimensionDefinitions[i].dimension = dimension_none; |
1367 |
pDimensionDefinitions[i].bits = 0; |
1368 |
pDimensionDefinitions[i].zones = 0; |
1369 |
pDimensionDefinitions[i].split_type = split_type_bit; |
1370 |
pDimensionDefinitions[i].ranges = NULL; |
1371 |
pDimensionDefinitions[i].zone_size = 0; |
1372 |
} |
1373 |
else { // active dimension |
1374 |
pDimensionDefinitions[i].dimension = dimension; |
1375 |
pDimensionDefinitions[i].bits = bits; |
1376 |
pDimensionDefinitions[i].zones = 0x01 << bits; // = pow(2,bits) |
1377 |
pDimensionDefinitions[i].split_type = (dimension == dimension_layer || |
1378 |
dimension == dimension_samplechannel || |
1379 |
dimension == dimension_releasetrigger) ? split_type_bit |
1380 |
: split_type_normal; |
1381 |
pDimensionDefinitions[i].ranges = NULL; // it's not possible to check velocity dimensions for custom defined ranges at this point |
1382 |
pDimensionDefinitions[i].zone_size = |
1383 |
(pDimensionDefinitions[i].split_type == split_type_normal) ? 128 / pDimensionDefinitions[i].zones |
1384 |
: 0; |
1385 |
Dimensions++; |
1386 |
|
1387 |
// if this is a layer dimension, remember the amount of layers |
1388 |
if (dimension == dimension_layer) Layers = pDimensionDefinitions[i].zones; |
1389 |
} |
1390 |
_3lnk->SetPos(6, RIFF::stream_curpos); // jump forward to next dimension definition |
1391 |
} |
1392 |
|
1393 |
// check velocity dimension (if there is one) for custom defined zone ranges |
1394 |
for (uint i = 0; i < Dimensions; i++) { |
1395 |
dimension_def_t* pDimDef = pDimensionDefinitions + i; |
1396 |
if (pDimDef->dimension == dimension_velocity) { |
1397 |
if (pDimensionRegions[0]->VelocityUpperLimit == 0) { |
1398 |
// no custom defined ranges |
1399 |
pDimDef->split_type = split_type_normal; |
1400 |
pDimDef->ranges = NULL; |
1401 |
} |
1402 |
else { // custom defined ranges |
1403 |
pDimDef->split_type = split_type_customvelocity; |
1404 |
pDimDef->ranges = new range_t[pDimDef->zones]; |
1405 |
uint8_t bits[8] = { 0 }; |
1406 |
int previousUpperLimit = -1; |
1407 |
for (int velocityZone = 0; velocityZone < pDimDef->zones; velocityZone++) { |
1408 |
bits[i] = velocityZone; |
1409 |
DimensionRegion* pDimRegion = GetDimensionRegionByBit(bits); |
1410 |
|
1411 |
pDimDef->ranges[velocityZone].low = previousUpperLimit + 1; |
1412 |
pDimDef->ranges[velocityZone].high = pDimRegion->VelocityUpperLimit; |
1413 |
previousUpperLimit = pDimDef->ranges[velocityZone].high; |
1414 |
// fill velocity table |
1415 |
for (int i = pDimDef->ranges[velocityZone].low; i <= pDimDef->ranges[velocityZone].high; i++) { |
1416 |
VelocityTable[i] = velocityZone; |
1417 |
} |
1418 |
} |
1419 |
} |
1420 |
} |
1421 |
} |
1422 |
|
1423 |
// jump to start of the wave pool indices (if not already there) |
1424 |
File* file = (File*) GetParent()->GetParent(); |
1425 |
if (file->pVersion && file->pVersion->major == 3) |
1426 |
_3lnk->SetPos(68); // version 3 has a different 3lnk structure |
1427 |
else |
1428 |
_3lnk->SetPos(44); |
1429 |
|
1430 |
// load sample references |
1431 |
for (uint i = 0; i < DimensionRegions; i++) { |
1432 |
uint32_t wavepoolindex = _3lnk->ReadUint32(); |
1433 |
pDimensionRegions[i]->pSample = GetSampleFromWavePool(wavepoolindex); |
1434 |
} |
1435 |
} |
1436 |
else throw gig::Exception("Mandatory <3lnk> chunk not found."); |
1437 |
} |
1438 |
|
1439 |
void Region::LoadDimensionRegions(RIFF::List* rgn) { |
1440 |
RIFF::List* _3prg = rgn->GetSubList(LIST_TYPE_3PRG); |
1441 |
if (_3prg) { |
1442 |
int dimensionRegionNr = 0; |
1443 |
RIFF::List* _3ewl = _3prg->GetFirstSubList(); |
1444 |
while (_3ewl) { |
1445 |
if (_3ewl->GetListType() == LIST_TYPE_3EWL) { |
1446 |
pDimensionRegions[dimensionRegionNr] = new DimensionRegion(_3ewl); |
1447 |
dimensionRegionNr++; |
1448 |
} |
1449 |
_3ewl = _3prg->GetNextSubList(); |
1450 |
} |
1451 |
if (dimensionRegionNr == 0) throw gig::Exception("No dimension region found."); |
1452 |
} |
1453 |
} |
1454 |
|
1455 |
Region::~Region() { |
1456 |
for (uint i = 0; i < Dimensions; i++) { |
1457 |
if (pDimensionDefinitions[i].ranges) delete[] pDimensionDefinitions[i].ranges; |
1458 |
} |
1459 |
for (int i = 0; i < 256; i++) { |
1460 |
if (pDimensionRegions[i]) delete pDimensionRegions[i]; |
1461 |
} |
1462 |
} |
1463 |
|
1464 |
/** |
1465 |
* Use this method in your audio engine to get the appropriate dimension |
1466 |
* region with it's articulation data for the current situation. Just |
1467 |
* call the method with the current MIDI controller values and you'll get |
1468 |
* the DimensionRegion with the appropriate articulation data for the |
1469 |
* current situation (for this Region of course only). To do that you'll |
1470 |
* first have to look which dimensions with which controllers and in |
1471 |
* which order are defined for this Region when you load the .gig file. |
1472 |
* Special cases are e.g. layer or channel dimensions where you just put |
1473 |
* in the index numbers instead of a MIDI controller value (means 0 for |
1474 |
* left channel, 1 for right channel or 0 for layer 0, 1 for layer 1, |
1475 |
* etc.). |
1476 |
* |
1477 |
* @param DimValues MIDI controller values (0-127) for dimension 0 to 7 |
1478 |
* @returns adress to the DimensionRegion for the given situation |
1479 |
* @see pDimensionDefinitions |
1480 |
* @see Dimensions |
1481 |
*/ |
1482 |
DimensionRegion* Region::GetDimensionRegionByValue(const uint DimValues[8]) { |
1483 |
uint8_t bits[8] = { 0 }; |
1484 |
for (uint i = 0; i < Dimensions; i++) { |
1485 |
bits[i] = DimValues[i]; |
1486 |
switch (pDimensionDefinitions[i].split_type) { |
1487 |
case split_type_normal: |
1488 |
bits[i] /= pDimensionDefinitions[i].zone_size; |
1489 |
break; |
1490 |
case split_type_customvelocity: |
1491 |
bits[i] = VelocityTable[bits[i]]; |
1492 |
break; |
1493 |
case split_type_bit: // the value is already the sought dimension bit number |
1494 |
const uint8_t limiter_mask = (0xff << pDimensionDefinitions[i].bits) ^ 0xff; |
1495 |
bits[i] = bits[i] & limiter_mask; // just make sure the value don't uses more bits than allowed |
1496 |
break; |
1497 |
} |
1498 |
} |
1499 |
return GetDimensionRegionByBit(bits); |
1500 |
} |
1501 |
|
1502 |
/** |
1503 |
* Returns the appropriate DimensionRegion for the given dimension bit |
1504 |
* numbers (zone index). You usually use <i>GetDimensionRegionByValue</i> |
1505 |
* instead of calling this method directly! |
1506 |
* |
1507 |
* @param DimBits Bit numbers for dimension 0 to 7 |
1508 |
* @returns adress to the DimensionRegion for the given dimension |
1509 |
* bit numbers |
1510 |
* @see GetDimensionRegionByValue() |
1511 |
*/ |
1512 |
DimensionRegion* Region::GetDimensionRegionByBit(const uint8_t DimBits[8]) { |
1513 |
return pDimensionRegions[((((((DimBits[7] << pDimensionDefinitions[6].bits | DimBits[6]) |
1514 |
<< pDimensionDefinitions[5].bits | DimBits[5]) |
1515 |
<< pDimensionDefinitions[4].bits | DimBits[4]) |
1516 |
<< pDimensionDefinitions[3].bits | DimBits[3]) |
1517 |
<< pDimensionDefinitions[2].bits | DimBits[2]) |
1518 |
<< pDimensionDefinitions[1].bits | DimBits[1]) |
1519 |
<< pDimensionDefinitions[0].bits | DimBits[0]]; |
1520 |
} |
1521 |
|
1522 |
/** |
1523 |
* Returns pointer address to the Sample referenced with this region. |
1524 |
* This is the global Sample for the entire Region (not sure if this is |
1525 |
* actually used by the Gigasampler engine - I would only use the Sample |
1526 |
* referenced by the appropriate DimensionRegion instead of this sample). |
1527 |
* |
1528 |
* @returns address to Sample or NULL if there is no reference to a |
1529 |
* sample saved in the .gig file |
1530 |
*/ |
1531 |
Sample* Region::GetSample() { |
1532 |
if (pSample) return static_cast<gig::Sample*>(pSample); |
1533 |
else return static_cast<gig::Sample*>(pSample = GetSampleFromWavePool(WavePoolTableIndex)); |
1534 |
} |
1535 |
|
1536 |
Sample* Region::GetSampleFromWavePool(unsigned int WavePoolTableIndex) { |
1537 |
if ((int32_t)WavePoolTableIndex == -1) return NULL; |
1538 |
File* file = (File*) GetParent()->GetParent(); |
1539 |
unsigned long soughtoffset = file->pWavePoolTable[WavePoolTableIndex]; |
1540 |
Sample* sample = file->GetFirstSample(); |
1541 |
while (sample) { |
1542 |
if (sample->ulWavePoolOffset == soughtoffset) return static_cast<gig::Sample*>(pSample = sample); |
1543 |
sample = file->GetNextSample(); |
1544 |
} |
1545 |
return NULL; |
1546 |
} |
1547 |
|
1548 |
|
1549 |
|
1550 |
// *************** Instrument *************** |
1551 |
// * |
1552 |
|
1553 |
Instrument::Instrument(File* pFile, RIFF::List* insList) : DLS::Instrument((DLS::File*)pFile, insList) { |
1554 |
// Initialization |
1555 |
for (int i = 0; i < 128; i++) RegionKeyTable[i] = NULL; |
1556 |
RegionIndex = -1; |
1557 |
|
1558 |
// Loading |
1559 |
RIFF::List* lart = insList->GetSubList(LIST_TYPE_LART); |
1560 |
if (lart) { |
1561 |
RIFF::Chunk* _3ewg = lart->GetSubChunk(CHUNK_ID_3EWG); |
1562 |
if (_3ewg) { |
1563 |
EffectSend = _3ewg->ReadUint16(); |
1564 |
Attenuation = _3ewg->ReadInt32(); |
1565 |
FineTune = _3ewg->ReadInt16(); |
1566 |
PitchbendRange = _3ewg->ReadInt16(); |
1567 |
uint8_t dimkeystart = _3ewg->ReadUint8(); |
1568 |
PianoReleaseMode = dimkeystart & 0x01; |
1569 |
DimensionKeyRange.low = dimkeystart >> 1; |
1570 |
DimensionKeyRange.high = _3ewg->ReadUint8(); |
1571 |
} |
1572 |
else throw gig::Exception("Mandatory <3ewg> chunk not found."); |
1573 |
} |
1574 |
else throw gig::Exception("Mandatory <lart> list chunk not found."); |
1575 |
|
1576 |
RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN); |
1577 |
if (!lrgn) throw gig::Exception("Mandatory chunks in <ins > chunk not found."); |
1578 |
pRegions = new Region*[Regions]; |
1579 |
for (uint i = 0; i < Regions; i++) pRegions[i] = NULL; |
1580 |
RIFF::List* rgn = lrgn->GetFirstSubList(); |
1581 |
unsigned int iRegion = 0; |
1582 |
while (rgn) { |
1583 |
if (rgn->GetListType() == LIST_TYPE_RGN) { |
1584 |
pRegions[iRegion] = new Region(this, rgn); |
1585 |
iRegion++; |
1586 |
} |
1587 |
rgn = lrgn->GetNextSubList(); |
1588 |
} |
1589 |
|
1590 |
// Creating Region Key Table for fast lookup |
1591 |
for (uint iReg = 0; iReg < Regions; iReg++) { |
1592 |
for (int iKey = pRegions[iReg]->KeyRange.low; iKey <= pRegions[iReg]->KeyRange.high; iKey++) { |
1593 |
RegionKeyTable[iKey] = pRegions[iReg]; |
1594 |
} |
1595 |
} |
1596 |
} |
1597 |
|
1598 |
Instrument::~Instrument() { |
1599 |
for (uint i = 0; i < Regions; i++) { |
1600 |
if (pRegions) { |
1601 |
if (pRegions[i]) delete (pRegions[i]); |
1602 |
} |
1603 |
} |
1604 |
if (pRegions) delete[] pRegions; |
1605 |
} |
1606 |
|
1607 |
/** |
1608 |
* Returns the appropriate Region for a triggered note. |
1609 |
* |
1610 |
* @param Key MIDI Key number of triggered note / key (0 - 127) |
1611 |
* @returns pointer adress to the appropriate Region or NULL if there |
1612 |
* there is no Region defined for the given \a Key |
1613 |
*/ |
1614 |
Region* Instrument::GetRegion(unsigned int Key) { |
1615 |
if (!pRegions || Key > 127) return NULL; |
1616 |
return RegionKeyTable[Key]; |
1617 |
/*for (int i = 0; i < Regions; i++) { |
1618 |
if (Key <= pRegions[i]->KeyRange.high && |
1619 |
Key >= pRegions[i]->KeyRange.low) return pRegions[i]; |
1620 |
} |
1621 |
return NULL;*/ |
1622 |
} |
1623 |
|
1624 |
/** |
1625 |
* Returns the first Region of the instrument. You have to call this |
1626 |
* method once before you use GetNextRegion(). |
1627 |
* |
1628 |
* @returns pointer address to first region or NULL if there is none |
1629 |
* @see GetNextRegion() |
1630 |
*/ |
1631 |
Region* Instrument::GetFirstRegion() { |
1632 |
if (!Regions) return NULL; |
1633 |
RegionIndex = 1; |
1634 |
return pRegions[0]; |
1635 |
} |
1636 |
|
1637 |
/** |
1638 |
* Returns the next Region of the instrument. You have to call |
1639 |
* GetFirstRegion() once before you can use this method. By calling this |
1640 |
* method multiple times it iterates through the available Regions. |
1641 |
* |
1642 |
* @returns pointer address to the next region or NULL if end reached |
1643 |
* @see GetFirstRegion() |
1644 |
*/ |
1645 |
Region* Instrument::GetNextRegion() { |
1646 |
if (RegionIndex < 0 || uint32_t(RegionIndex) >= Regions) return NULL; |
1647 |
return pRegions[RegionIndex++]; |
1648 |
} |
1649 |
|
1650 |
|
1651 |
|
1652 |
// *************** File *************** |
1653 |
// * |
1654 |
|
1655 |
File::File(RIFF::File* pRIFF) : DLS::File(pRIFF) { |
1656 |
pSamples = NULL; |
1657 |
pInstruments = NULL; |
1658 |
} |
1659 |
|
1660 |
File::~File() { |
1661 |
// free samples |
1662 |
if (pSamples) { |
1663 |
SamplesIterator = pSamples->begin(); |
1664 |
while (SamplesIterator != pSamples->end() ) { |
1665 |
delete (*SamplesIterator); |
1666 |
SamplesIterator++; |
1667 |
} |
1668 |
pSamples->clear(); |
1669 |
delete pSamples; |
1670 |
|
1671 |
} |
1672 |
// free instruments |
1673 |
if (pInstruments) { |
1674 |
InstrumentsIterator = pInstruments->begin(); |
1675 |
while (InstrumentsIterator != pInstruments->end() ) { |
1676 |
delete (*InstrumentsIterator); |
1677 |
InstrumentsIterator++; |
1678 |
} |
1679 |
pInstruments->clear(); |
1680 |
delete pInstruments; |
1681 |
} |
1682 |
} |
1683 |
|
1684 |
Sample* File::GetFirstSample() { |
1685 |
if (!pSamples) LoadSamples(); |
1686 |
if (!pSamples) return NULL; |
1687 |
SamplesIterator = pSamples->begin(); |
1688 |
return static_cast<gig::Sample*>( (SamplesIterator != pSamples->end()) ? *SamplesIterator : NULL ); |
1689 |
} |
1690 |
|
1691 |
Sample* File::GetNextSample() { |
1692 |
if (!pSamples) return NULL; |
1693 |
SamplesIterator++; |
1694 |
return static_cast<gig::Sample*>( (SamplesIterator != pSamples->end()) ? *SamplesIterator : NULL ); |
1695 |
} |
1696 |
|
1697 |
void File::LoadSamples() { |
1698 |
RIFF::List* wvpl = pRIFF->GetSubList(LIST_TYPE_WVPL); |
1699 |
if (wvpl) { |
1700 |
unsigned long wvplFileOffset = wvpl->GetFilePos(); |
1701 |
RIFF::List* wave = wvpl->GetFirstSubList(); |
1702 |
while (wave) { |
1703 |
if (wave->GetListType() == LIST_TYPE_WAVE) { |
1704 |
if (!pSamples) pSamples = new SampleList; |
1705 |
unsigned long waveFileOffset = wave->GetFilePos(); |
1706 |
pSamples->push_back(new Sample(this, wave, waveFileOffset - wvplFileOffset)); |
1707 |
} |
1708 |
wave = wvpl->GetNextSubList(); |
1709 |
} |
1710 |
} |
1711 |
else throw gig::Exception("Mandatory <wvpl> chunk not found."); |
1712 |
} |
1713 |
|
1714 |
Instrument* File::GetFirstInstrument() { |
1715 |
if (!pInstruments) LoadInstruments(); |
1716 |
if (!pInstruments) return NULL; |
1717 |
InstrumentsIterator = pInstruments->begin(); |
1718 |
return (InstrumentsIterator != pInstruments->end()) ? *InstrumentsIterator : NULL; |
1719 |
} |
1720 |
|
1721 |
Instrument* File::GetNextInstrument() { |
1722 |
if (!pInstruments) return NULL; |
1723 |
InstrumentsIterator++; |
1724 |
return (InstrumentsIterator != pInstruments->end()) ? *InstrumentsIterator : NULL; |
1725 |
} |
1726 |
|
1727 |
/** |
1728 |
* Returns the instrument with the given index. |
1729 |
* |
1730 |
* @returns sought instrument or NULL if there's no such instrument |
1731 |
*/ |
1732 |
Instrument* File::GetInstrument(uint index) { |
1733 |
if (!pInstruments) LoadInstruments(); |
1734 |
if (!pInstruments) return NULL; |
1735 |
InstrumentsIterator = pInstruments->begin(); |
1736 |
for (uint i = 0; InstrumentsIterator != pInstruments->end(); i++) { |
1737 |
if (i == index) return *InstrumentsIterator; |
1738 |
InstrumentsIterator++; |
1739 |
} |
1740 |
return NULL; |
1741 |
} |
1742 |
|
1743 |
void File::LoadInstruments() { |
1744 |
RIFF::List* lstInstruments = pRIFF->GetSubList(LIST_TYPE_LINS); |
1745 |
if (lstInstruments) { |
1746 |
RIFF::List* lstInstr = lstInstruments->GetFirstSubList(); |
1747 |
while (lstInstr) { |
1748 |
if (lstInstr->GetListType() == LIST_TYPE_INS) { |
1749 |
if (!pInstruments) pInstruments = new InstrumentList; |
1750 |
pInstruments->push_back(new Instrument(this, lstInstr)); |
1751 |
} |
1752 |
lstInstr = lstInstruments->GetNextSubList(); |
1753 |
} |
1754 |
} |
1755 |
else throw gig::Exception("Mandatory <lins> list chunk not found."); |
1756 |
} |
1757 |
|
1758 |
|
1759 |
|
1760 |
// *************** Exception *************** |
1761 |
// * |
1762 |
|
1763 |
Exception::Exception(String Message) : DLS::Exception(Message) { |
1764 |
} |
1765 |
|
1766 |
void Exception::PrintMessage() { |
1767 |
std::cout << "gig::Exception: " << Message << std::endl; |
1768 |
} |
1769 |
|
1770 |
} // namespace gig |