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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 { |
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|
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// *************** progress_t *************** |
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// * |
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|
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progress_t::progress_t() { |
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callback = NULL; |
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__range_min = 0.0f; |
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__range_max = 1.0f; |
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} |
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|
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// private helper function to convert progress of a subprocess into the global progress |
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static void __notify_progress(progress_t* pProgress, float subprogress) { |
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if (pProgress && pProgress->callback) { |
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const float totalrange = pProgress->__range_max - pProgress->__range_min; |
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const float totalprogress = pProgress->__range_min + subprogress * totalrange; |
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pProgress->callback(totalprogress); // now actually notify about the progress |
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} |
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} |
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|
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// private helper function to divide a progress into subprogresses |
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static void __divide_progress(progress_t* pParentProgress, progress_t* pSubProgress, float totalTasks, float currentTask) { |
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if (pParentProgress && pParentProgress->callback) { |
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const float totalrange = pParentProgress->__range_max - pParentProgress->__range_min; |
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pSubProgress->callback = pParentProgress->callback; |
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pSubProgress->__range_min = pParentProgress->__range_min + totalrange * currentTask / totalTasks; |
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pSubProgress->__range_max = pSubProgress->__range_min + totalrange / totalTasks; |
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} |
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} |
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|
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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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namespace { |
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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, int truncatedBits) |
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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 an extra step, 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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const int shift = 8 - truncatedBits; |
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const int shift1 = shift + 1; |
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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 >> shift1; \ |
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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) >> shift; |
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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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RIFF::Chunk* ewav = waveList->GetSubChunk(CHUNK_ID_EWAV); |
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Compressed = ewav; |
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Dithered = false; |
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TruncatedBits = 0; |
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if (Compressed) { |
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uint32_t version = ewav->ReadInt32(); |
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if (version == 3 && BitDepth == 24) { |
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Dithered = ewav->ReadInt32(); |
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ewav->SetPos(Channels == 2 ? 84 : 64); |
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TruncatedBits = ewav->ReadInt32(); |
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} |
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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. |
406 |
* The method will add \a NullSamplesCount silence samples past the |
407 |
* official buffer end (this won't affect the 'Size' member of the |
408 |
* buffer_t structure, that means 'Size' always reflects the size of the |
409 |
* actual sample data, the buffer might be bigger though). Silence |
410 |
* samples past the official buffer are needed for differential |
411 |
* algorithms that always have to take subsequent samples into account |
412 |
* (resampling/interpolation would be an important example) and avoids |
413 |
* memory access faults in such cases. |
414 |
* |
415 |
* @param NullSamplesCount - number of silence samples the buffer should |
416 |
* be extended past it's data end |
417 |
* @returns buffer_t structure with start address and |
418 |
* size of the buffer in bytes |
419 |
* @see ReleaseSampleData(), Read(), SetPos() |
420 |
*/ |
421 |
buffer_t Sample::LoadSampleDataWithNullSamplesExtension(uint NullSamplesCount) { |
422 |
return LoadSampleDataWithNullSamplesExtension(this->SamplesTotal, NullSamplesCount); |
423 |
} |
424 |
|
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/** |
426 |
* Reads (uncompresses if needed) and caches the first \a SampleCount |
427 |
* numbers of SamplePoints in RAM. Use ReleaseSampleData() to free the |
428 |
* memory space if you don't need the cached samples anymore. There is no |
429 |
* guarantee that exactly \a SampleCount samples will be cached; this is |
430 |
* not an error. The size will be eventually truncated e.g. to the |
431 |
* beginning of a frame of a compressed sample. This is done for |
432 |
* efficiency reasons while streaming the wave by your sampler engine |
433 |
* later. Read the <i>Size</i> member of the <i>buffer_t</i> structure |
434 |
* that will be returned to determine the actual cached samples, but note |
435 |
* that the size is given in bytes! You get the number of actually cached |
436 |
* samples by dividing it by the frame size of the sample: |
437 |
* @code |
438 |
* buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(acquired_samples, null_samples); |
439 |
* long cachedsamples = buf.Size / pSample->FrameSize; |
440 |
* @endcode |
441 |
* The method will add \a NullSamplesCount silence samples past the |
442 |
* official buffer end (this won't affect the 'Size' member of the |
443 |
* buffer_t structure, that means 'Size' always reflects the size of the |
444 |
* actual sample data, the buffer might be bigger though). Silence |
445 |
* samples past the official buffer are needed for differential |
446 |
* algorithms that always have to take subsequent samples into account |
447 |
* (resampling/interpolation would be an important example) and avoids |
448 |
* memory access faults in such cases. |
449 |
* |
450 |
* @param SampleCount - number of sample points to load into RAM |
451 |
* @param NullSamplesCount - number of silence samples the buffer should |
452 |
* be extended past it's data end |
453 |
* @returns buffer_t structure with start address and |
454 |
* size of the cached sample data in bytes |
455 |
* @see ReleaseSampleData(), Read(), SetPos() |
456 |
*/ |
457 |
buffer_t Sample::LoadSampleDataWithNullSamplesExtension(unsigned long SampleCount, uint NullSamplesCount) { |
458 |
if (SampleCount > this->SamplesTotal) SampleCount = this->SamplesTotal; |
459 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
460 |
unsigned long allocationsize = (SampleCount + NullSamplesCount) * this->FrameSize; |
461 |
RAMCache.pStart = new int8_t[allocationsize]; |
462 |
RAMCache.Size = Read(RAMCache.pStart, SampleCount) * this->FrameSize; |
463 |
RAMCache.NullExtensionSize = allocationsize - RAMCache.Size; |
464 |
// fill the remaining buffer space with silence samples |
465 |
memset((int8_t*)RAMCache.pStart + RAMCache.Size, 0, RAMCache.NullExtensionSize); |
466 |
return GetCache(); |
467 |
} |
468 |
|
469 |
/** |
470 |
* Returns current cached sample points. A buffer_t structure will be |
471 |
* returned which contains address pointer to the begin of the cache and |
472 |
* the size of the cached sample data in bytes. Use |
473 |
* <i>LoadSampleData()</i> to cache a specific amount of sample points in |
474 |
* RAM. |
475 |
* |
476 |
* @returns buffer_t structure with current cached sample points |
477 |
* @see LoadSampleData(); |
478 |
*/ |
479 |
buffer_t Sample::GetCache() { |
480 |
// return a copy of the buffer_t structure |
481 |
buffer_t result; |
482 |
result.Size = this->RAMCache.Size; |
483 |
result.pStart = this->RAMCache.pStart; |
484 |
result.NullExtensionSize = this->RAMCache.NullExtensionSize; |
485 |
return result; |
486 |
} |
487 |
|
488 |
/** |
489 |
* Frees the cached sample from RAM if loaded with |
490 |
* <i>LoadSampleData()</i> previously. |
491 |
* |
492 |
* @see LoadSampleData(); |
493 |
*/ |
494 |
void Sample::ReleaseSampleData() { |
495 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
496 |
RAMCache.pStart = NULL; |
497 |
RAMCache.Size = 0; |
498 |
} |
499 |
|
500 |
/** |
501 |
* Sets the position within the sample (in sample points, not in |
502 |
* bytes). Use this method and <i>Read()</i> if you don't want to load |
503 |
* the sample into RAM, thus for disk streaming. |
504 |
* |
505 |
* Although the original Gigasampler engine doesn't allow positioning |
506 |
* within compressed samples, I decided to implement it. Even though |
507 |
* the Gigasampler format doesn't allow to define loops for compressed |
508 |
* samples at the moment, positioning within compressed samples might be |
509 |
* interesting for some sampler engines though. The only drawback about |
510 |
* my decision is that it takes longer to load compressed gig Files on |
511 |
* startup, because it's neccessary to scan the samples for some |
512 |
* mandatory informations. But I think as it doesn't affect the runtime |
513 |
* efficiency, nobody will have a problem with that. |
514 |
* |
515 |
* @param SampleCount number of sample points to jump |
516 |
* @param Whence optional: to which relation \a SampleCount refers |
517 |
* to, if omited <i>RIFF::stream_start</i> is assumed |
518 |
* @returns the new sample position |
519 |
* @see Read() |
520 |
*/ |
521 |
unsigned long Sample::SetPos(unsigned long SampleCount, RIFF::stream_whence_t Whence) { |
522 |
if (Compressed) { |
523 |
switch (Whence) { |
524 |
case RIFF::stream_curpos: |
525 |
this->SamplePos += SampleCount; |
526 |
break; |
527 |
case RIFF::stream_end: |
528 |
this->SamplePos = this->SamplesTotal - 1 - SampleCount; |
529 |
break; |
530 |
case RIFF::stream_backward: |
531 |
this->SamplePos -= SampleCount; |
532 |
break; |
533 |
case RIFF::stream_start: default: |
534 |
this->SamplePos = SampleCount; |
535 |
break; |
536 |
} |
537 |
if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal; |
538 |
|
539 |
unsigned long frame = this->SamplePos / 2048; // to which frame to jump |
540 |
this->FrameOffset = this->SamplePos % 2048; // offset (in sample points) within that frame |
541 |
pCkData->SetPos(FrameTable[frame]); // set chunk pointer to the start of sought frame |
542 |
return this->SamplePos; |
543 |
} |
544 |
else { // not compressed |
545 |
unsigned long orderedBytes = SampleCount * this->FrameSize; |
546 |
unsigned long result = pCkData->SetPos(orderedBytes, Whence); |
547 |
return (result == orderedBytes) ? SampleCount |
548 |
: result / this->FrameSize; |
549 |
} |
550 |
} |
551 |
|
552 |
/** |
553 |
* Returns the current position in the sample (in sample points). |
554 |
*/ |
555 |
unsigned long Sample::GetPos() { |
556 |
if (Compressed) return SamplePos; |
557 |
else return pCkData->GetPos() / FrameSize; |
558 |
} |
559 |
|
560 |
/** |
561 |
* Reads \a SampleCount number of sample points from the position stored |
562 |
* in \a pPlaybackState into the buffer pointed by \a pBuffer and moves |
563 |
* the position within the sample respectively, this method honors the |
564 |
* looping informations of the sample (if any). The sample wave stream |
565 |
* will be decompressed on the fly if using a compressed sample. Use this |
566 |
* method if you don't want to load the sample into RAM, thus for disk |
567 |
* streaming. All this methods needs to know to proceed with streaming |
568 |
* for the next time you call this method is stored in \a pPlaybackState. |
569 |
* You have to allocate and initialize the playback_state_t structure by |
570 |
* yourself before you use it to stream a sample: |
571 |
* @code |
572 |
* gig::playback_state_t playbackstate; |
573 |
* playbackstate.position = 0; |
574 |
* playbackstate.reverse = false; |
575 |
* playbackstate.loop_cycles_left = pSample->LoopPlayCount; |
576 |
* @endcode |
577 |
* You don't have to take care of things like if there is actually a loop |
578 |
* defined or if the current read position is located within a loop area. |
579 |
* The method already handles such cases by itself. |
580 |
* |
581 |
* <b>Caution:</b> If you are using more than one streaming thread, you |
582 |
* have to use an external decompression buffer for <b>EACH</b> |
583 |
* streaming thread to avoid race conditions and crashes! |
584 |
* |
585 |
* @param pBuffer destination buffer |
586 |
* @param SampleCount number of sample points to read |
587 |
* @param pPlaybackState will be used to store and reload the playback |
588 |
* state for the next ReadAndLoop() call |
589 |
* @param pExternalDecompressionBuffer (optional) external buffer to use for decompression |
590 |
* @returns number of successfully read sample points |
591 |
* @see CreateDecompressionBuffer() |
592 |
*/ |
593 |
unsigned long Sample::ReadAndLoop(void* pBuffer, unsigned long SampleCount, playback_state_t* pPlaybackState, buffer_t* pExternalDecompressionBuffer) { |
594 |
unsigned long samplestoread = SampleCount, totalreadsamples = 0, readsamples, samplestoloopend; |
595 |
uint8_t* pDst = (uint8_t*) pBuffer; |
596 |
|
597 |
SetPos(pPlaybackState->position); // recover position from the last time |
598 |
|
599 |
if (this->Loops && GetPos() <= this->LoopEnd) { // honor looping if there are loop points defined |
600 |
|
601 |
switch (this->LoopType) { |
602 |
|
603 |
case loop_type_bidirectional: { //TODO: not tested yet! |
604 |
do { |
605 |
// if not endless loop check if max. number of loop cycles have been passed |
606 |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
607 |
|
608 |
if (!pPlaybackState->reverse) { // forward playback |
609 |
do { |
610 |
samplestoloopend = this->LoopEnd - GetPos(); |
611 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
612 |
samplestoread -= readsamples; |
613 |
totalreadsamples += readsamples; |
614 |
if (readsamples == samplestoloopend) { |
615 |
pPlaybackState->reverse = true; |
616 |
break; |
617 |
} |
618 |
} while (samplestoread && readsamples); |
619 |
} |
620 |
else { // backward playback |
621 |
|
622 |
// as we can only read forward from disk, we have to |
623 |
// determine the end position within the loop first, |
624 |
// read forward from that 'end' and finally after |
625 |
// reading, swap all sample frames so it reflects |
626 |
// backward playback |
627 |
|
628 |
unsigned long swapareastart = totalreadsamples; |
629 |
unsigned long loopoffset = GetPos() - this->LoopStart; |
630 |
unsigned long samplestoreadinloop = Min(samplestoread, loopoffset); |
631 |
unsigned long reverseplaybackend = GetPos() - samplestoreadinloop; |
632 |
|
633 |
SetPos(reverseplaybackend); |
634 |
|
635 |
// read samples for backward playback |
636 |
do { |
637 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoreadinloop, pExternalDecompressionBuffer); |
638 |
samplestoreadinloop -= readsamples; |
639 |
samplestoread -= readsamples; |
640 |
totalreadsamples += readsamples; |
641 |
} while (samplestoreadinloop && readsamples); |
642 |
|
643 |
SetPos(reverseplaybackend); // pretend we really read backwards |
644 |
|
645 |
if (reverseplaybackend == this->LoopStart) { |
646 |
pPlaybackState->loop_cycles_left--; |
647 |
pPlaybackState->reverse = false; |
648 |
} |
649 |
|
650 |
// reverse the sample frames for backward playback |
651 |
SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize); |
652 |
} |
653 |
} while (samplestoread && readsamples); |
654 |
break; |
655 |
} |
656 |
|
657 |
case loop_type_backward: { // TODO: not tested yet! |
658 |
// forward playback (not entered the loop yet) |
659 |
if (!pPlaybackState->reverse) do { |
660 |
samplestoloopend = this->LoopEnd - GetPos(); |
661 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
662 |
samplestoread -= readsamples; |
663 |
totalreadsamples += readsamples; |
664 |
if (readsamples == samplestoloopend) { |
665 |
pPlaybackState->reverse = true; |
666 |
break; |
667 |
} |
668 |
} while (samplestoread && readsamples); |
669 |
|
670 |
if (!samplestoread) break; |
671 |
|
672 |
// as we can only read forward from disk, we have to |
673 |
// determine the end position within the loop first, |
674 |
// read forward from that 'end' and finally after |
675 |
// reading, swap all sample frames so it reflects |
676 |
// backward playback |
677 |
|
678 |
unsigned long swapareastart = totalreadsamples; |
679 |
unsigned long loopoffset = GetPos() - this->LoopStart; |
680 |
unsigned long samplestoreadinloop = (this->LoopPlayCount) ? Min(samplestoread, pPlaybackState->loop_cycles_left * LoopSize - loopoffset) |
681 |
: samplestoread; |
682 |
unsigned long reverseplaybackend = this->LoopStart + Abs((loopoffset - samplestoreadinloop) % this->LoopSize); |
683 |
|
684 |
SetPos(reverseplaybackend); |
685 |
|
686 |
// read samples for backward playback |
687 |
do { |
688 |
// if not endless loop check if max. number of loop cycles have been passed |
689 |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
690 |
samplestoloopend = this->LoopEnd - GetPos(); |
691 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoreadinloop, samplestoloopend), pExternalDecompressionBuffer); |
692 |
samplestoreadinloop -= readsamples; |
693 |
samplestoread -= readsamples; |
694 |
totalreadsamples += readsamples; |
695 |
if (readsamples == samplestoloopend) { |
696 |
pPlaybackState->loop_cycles_left--; |
697 |
SetPos(this->LoopStart); |
698 |
} |
699 |
} while (samplestoreadinloop && readsamples); |
700 |
|
701 |
SetPos(reverseplaybackend); // pretend we really read backwards |
702 |
|
703 |
// reverse the sample frames for backward playback |
704 |
SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize); |
705 |
break; |
706 |
} |
707 |
|
708 |
default: case loop_type_normal: { |
709 |
do { |
710 |
// if not endless loop check if max. number of loop cycles have been passed |
711 |
if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break; |
712 |
samplestoloopend = this->LoopEnd - GetPos(); |
713 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend), pExternalDecompressionBuffer); |
714 |
samplestoread -= readsamples; |
715 |
totalreadsamples += readsamples; |
716 |
if (readsamples == samplestoloopend) { |
717 |
pPlaybackState->loop_cycles_left--; |
718 |
SetPos(this->LoopStart); |
719 |
} |
720 |
} while (samplestoread && readsamples); |
721 |
break; |
722 |
} |
723 |
} |
724 |
} |
725 |
|
726 |
// read on without looping |
727 |
if (samplestoread) do { |
728 |
readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoread, pExternalDecompressionBuffer); |
729 |
samplestoread -= readsamples; |
730 |
totalreadsamples += readsamples; |
731 |
} while (readsamples && samplestoread); |
732 |
|
733 |
// store current position |
734 |
pPlaybackState->position = GetPos(); |
735 |
|
736 |
return totalreadsamples; |
737 |
} |
738 |
|
739 |
/** |
740 |
* Reads \a SampleCount number of sample points from the current |
741 |
* position into the buffer pointed by \a pBuffer and increments the |
742 |
* position within the sample. The sample wave stream will be |
743 |
* decompressed on the fly if using a compressed sample. Use this method |
744 |
* and <i>SetPos()</i> if you don't want to load the sample into RAM, |
745 |
* thus for disk streaming. |
746 |
* |
747 |
* <b>Caution:</b> If you are using more than one streaming thread, you |
748 |
* have to use an external decompression buffer for <b>EACH</b> |
749 |
* streaming thread to avoid race conditions and crashes! |
750 |
* |
751 |
* @param pBuffer destination buffer |
752 |
* @param SampleCount number of sample points to read |
753 |
* @param pExternalDecompressionBuffer (optional) external buffer to use for decompression |
754 |
* @returns number of successfully read sample points |
755 |
* @see SetPos(), CreateDecompressionBuffer() |
756 |
*/ |
757 |
unsigned long Sample::Read(void* pBuffer, unsigned long SampleCount, buffer_t* pExternalDecompressionBuffer) { |
758 |
if (SampleCount == 0) return 0; |
759 |
if (!Compressed) { |
760 |
if (BitDepth == 24) { |
761 |
// 24 bit sample. For now just truncate to 16 bit. |
762 |
unsigned char* pSrc = (unsigned char*) ((pExternalDecompressionBuffer) ? pExternalDecompressionBuffer->pStart : this->InternalDecompressionBuffer.pStart); |
763 |
int16_t* pDst = static_cast<int16_t*>(pBuffer); |
764 |
if (Channels == 2) { // Stereo |
765 |
unsigned long readBytes = pCkData->Read(pSrc, SampleCount * 6, 1); |
766 |
pSrc++; |
767 |
for (unsigned long i = readBytes ; i > 0 ; i -= 3) { |
768 |
*pDst++ = get16(pSrc); |
769 |
pSrc += 3; |
770 |
} |
771 |
return (pDst - static_cast<int16_t*>(pBuffer)) >> 1; |
772 |
} |
773 |
else { // Mono |
774 |
unsigned long readBytes = pCkData->Read(pSrc, SampleCount * 3, 1); |
775 |
pSrc++; |
776 |
for (unsigned long i = readBytes ; i > 0 ; i -= 3) { |
777 |
*pDst++ = get16(pSrc); |
778 |
pSrc += 3; |
779 |
} |
780 |
return pDst - static_cast<int16_t*>(pBuffer); |
781 |
} |
782 |
} |
783 |
else { // 16 bit |
784 |
// (pCkData->Read does endian correction) |
785 |
return Channels == 2 ? pCkData->Read(pBuffer, SampleCount << 1, 2) >> 1 |
786 |
: pCkData->Read(pBuffer, SampleCount, 2); |
787 |
} |
788 |
} |
789 |
else { |
790 |
if (this->SamplePos >= this->SamplesTotal) return 0; |
791 |
//TODO: efficiency: maybe we should test for an average compression rate |
792 |
unsigned long assumedsize = GuessSize(SampleCount), |
793 |
remainingbytes = 0, // remaining bytes in the local buffer |
794 |
remainingsamples = SampleCount, |
795 |
copysamples, skipsamples, |
796 |
currentframeoffset = this->FrameOffset; // offset in current sample frame since last Read() |
797 |
this->FrameOffset = 0; |
798 |
|
799 |
buffer_t* pDecompressionBuffer = (pExternalDecompressionBuffer) ? pExternalDecompressionBuffer : &InternalDecompressionBuffer; |
800 |
|
801 |
// if decompression buffer too small, then reduce amount of samples to read |
802 |
if (pDecompressionBuffer->Size < assumedsize) { |
803 |
std::cerr << "gig::Read(): WARNING - decompression buffer size too small!" << std::endl; |
804 |
SampleCount = WorstCaseMaxSamples(pDecompressionBuffer); |
805 |
remainingsamples = SampleCount; |
806 |
assumedsize = GuessSize(SampleCount); |
807 |
} |
808 |
|
809 |
unsigned char* pSrc = (unsigned char*) pDecompressionBuffer->pStart; |
810 |
int16_t* pDst = static_cast<int16_t*>(pBuffer); |
811 |
remainingbytes = pCkData->Read(pSrc, assumedsize, 1); |
812 |
|
813 |
while (remainingsamples && remainingbytes) { |
814 |
unsigned long framesamples = SamplesPerFrame; |
815 |
unsigned long framebytes, rightChannelOffset = 0, nextFrameOffset; |
816 |
|
817 |
int mode_l = *pSrc++, mode_r = 0; |
818 |
|
819 |
if (Channels == 2) { |
820 |
mode_r = *pSrc++; |
821 |
framebytes = bytesPerFrame[mode_l] + bytesPerFrame[mode_r] + 2; |
822 |
rightChannelOffset = bytesPerFrameNoHdr[mode_l]; |
823 |
nextFrameOffset = rightChannelOffset + bytesPerFrameNoHdr[mode_r]; |
824 |
if (remainingbytes < framebytes) { // last frame in sample |
825 |
framesamples = SamplesInLastFrame; |
826 |
if (mode_l == 4 && (framesamples & 1)) { |
827 |
rightChannelOffset = ((framesamples + 1) * bitsPerSample[mode_l]) >> 3; |
828 |
} |
829 |
else { |
830 |
rightChannelOffset = (framesamples * bitsPerSample[mode_l]) >> 3; |
831 |
} |
832 |
} |
833 |
} |
834 |
else { |
835 |
framebytes = bytesPerFrame[mode_l] + 1; |
836 |
nextFrameOffset = bytesPerFrameNoHdr[mode_l]; |
837 |
if (remainingbytes < framebytes) { |
838 |
framesamples = SamplesInLastFrame; |
839 |
} |
840 |
} |
841 |
|
842 |
// determine how many samples in this frame to skip and read |
843 |
if (currentframeoffset + remainingsamples >= framesamples) { |
844 |
if (currentframeoffset <= framesamples) { |
845 |
copysamples = framesamples - currentframeoffset; |
846 |
skipsamples = currentframeoffset; |
847 |
} |
848 |
else { |
849 |
copysamples = 0; |
850 |
skipsamples = framesamples; |
851 |
} |
852 |
} |
853 |
else { |
854 |
// This frame has enough data for pBuffer, but not |
855 |
// all of the frame is needed. Set file position |
856 |
// to start of this frame for next call to Read. |
857 |
copysamples = remainingsamples; |
858 |
skipsamples = currentframeoffset; |
859 |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
860 |
this->FrameOffset = currentframeoffset + copysamples; |
861 |
} |
862 |
remainingsamples -= copysamples; |
863 |
|
864 |
if (remainingbytes > framebytes) { |
865 |
remainingbytes -= framebytes; |
866 |
if (remainingsamples == 0 && |
867 |
currentframeoffset + copysamples == framesamples) { |
868 |
// This frame has enough data for pBuffer, and |
869 |
// all of the frame is needed. Set file |
870 |
// position to start of next frame for next |
871 |
// call to Read. FrameOffset is 0. |
872 |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
873 |
} |
874 |
} |
875 |
else remainingbytes = 0; |
876 |
|
877 |
currentframeoffset -= skipsamples; |
878 |
|
879 |
if (copysamples == 0) { |
880 |
// skip this frame |
881 |
pSrc += framebytes - Channels; |
882 |
} |
883 |
else { |
884 |
const unsigned char* const param_l = pSrc; |
885 |
if (BitDepth == 24) { |
886 |
if (mode_l != 2) pSrc += 12; |
887 |
|
888 |
if (Channels == 2) { // Stereo |
889 |
const unsigned char* const param_r = pSrc; |
890 |
if (mode_r != 2) pSrc += 12; |
891 |
|
892 |
Decompress24(mode_l, param_l, 2, pSrc, pDst, |
893 |
skipsamples, copysamples, TruncatedBits); |
894 |
Decompress24(mode_r, param_r, 2, pSrc + rightChannelOffset, pDst + 1, |
895 |
skipsamples, copysamples, TruncatedBits); |
896 |
pDst += copysamples << 1; |
897 |
} |
898 |
else { // Mono |
899 |
Decompress24(mode_l, param_l, 1, pSrc, pDst, |
900 |
skipsamples, copysamples, TruncatedBits); |
901 |
pDst += copysamples; |
902 |
} |
903 |
} |
904 |
else { // 16 bit |
905 |
if (mode_l) pSrc += 4; |
906 |
|
907 |
int step; |
908 |
if (Channels == 2) { // Stereo |
909 |
const unsigned char* const param_r = pSrc; |
910 |
if (mode_r) pSrc += 4; |
911 |
|
912 |
step = (2 - mode_l) + (2 - mode_r); |
913 |
Decompress16(mode_l, param_l, step, 2, pSrc, pDst, skipsamples, copysamples); |
914 |
Decompress16(mode_r, param_r, step, 2, pSrc + (2 - mode_l), pDst + 1, |
915 |
skipsamples, copysamples); |
916 |
pDst += copysamples << 1; |
917 |
} |
918 |
else { // Mono |
919 |
step = 2 - mode_l; |
920 |
Decompress16(mode_l, param_l, step, 1, pSrc, pDst, skipsamples, copysamples); |
921 |
pDst += copysamples; |
922 |
} |
923 |
} |
924 |
pSrc += nextFrameOffset; |
925 |
} |
926 |
|
927 |
// reload from disk to local buffer if needed |
928 |
if (remainingsamples && remainingbytes < WorstCaseFrameSize && pCkData->GetState() == RIFF::stream_ready) { |
929 |
assumedsize = GuessSize(remainingsamples); |
930 |
pCkData->SetPos(remainingbytes, RIFF::stream_backward); |
931 |
if (pCkData->RemainingBytes() < assumedsize) assumedsize = pCkData->RemainingBytes(); |
932 |
remainingbytes = pCkData->Read(pDecompressionBuffer->pStart, assumedsize, 1); |
933 |
pSrc = (unsigned char*) pDecompressionBuffer->pStart; |
934 |
} |
935 |
} // while |
936 |
|
937 |
this->SamplePos += (SampleCount - remainingsamples); |
938 |
if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal; |
939 |
return (SampleCount - remainingsamples); |
940 |
} |
941 |
} |
942 |
|
943 |
/** |
944 |
* Allocates a decompression buffer for streaming (compressed) samples |
945 |
* with Sample::Read(). If you are using more than one streaming thread |
946 |
* in your application you <b>HAVE</b> to create a decompression buffer |
947 |
* for <b>EACH</b> of your streaming threads and provide it with the |
948 |
* Sample::Read() call in order to avoid race conditions and crashes. |
949 |
* |
950 |
* You should free the memory occupied by the allocated buffer(s) once |
951 |
* you don't need one of your streaming threads anymore by calling |
952 |
* DestroyDecompressionBuffer(). |
953 |
* |
954 |
* @param MaxReadSize - the maximum size (in sample points) you ever |
955 |
* expect to read with one Read() call |
956 |
* @returns allocated decompression buffer |
957 |
* @see DestroyDecompressionBuffer() |
958 |
*/ |
959 |
buffer_t Sample::CreateDecompressionBuffer(unsigned long MaxReadSize) { |
960 |
buffer_t result; |
961 |
const double worstCaseHeaderOverhead = |
962 |
(256.0 /*frame size*/ + 12.0 /*header*/ + 2.0 /*compression type flag (stereo)*/) / 256.0; |
963 |
result.Size = (unsigned long) (double(MaxReadSize) * 3.0 /*(24 Bit)*/ * 2.0 /*stereo*/ * worstCaseHeaderOverhead); |
964 |
result.pStart = new int8_t[result.Size]; |
965 |
result.NullExtensionSize = 0; |
966 |
return result; |
967 |
} |
968 |
|
969 |
/** |
970 |
* Free decompression buffer, previously created with |
971 |
* CreateDecompressionBuffer(). |
972 |
* |
973 |
* @param DecompressionBuffer - previously allocated decompression |
974 |
* buffer to free |
975 |
*/ |
976 |
void Sample::DestroyDecompressionBuffer(buffer_t& DecompressionBuffer) { |
977 |
if (DecompressionBuffer.Size && DecompressionBuffer.pStart) { |
978 |
delete[] (int8_t*) DecompressionBuffer.pStart; |
979 |
DecompressionBuffer.pStart = NULL; |
980 |
DecompressionBuffer.Size = 0; |
981 |
DecompressionBuffer.NullExtensionSize = 0; |
982 |
} |
983 |
} |
984 |
|
985 |
Sample::~Sample() { |
986 |
Instances--; |
987 |
if (!Instances && InternalDecompressionBuffer.Size) { |
988 |
delete[] (unsigned char*) InternalDecompressionBuffer.pStart; |
989 |
InternalDecompressionBuffer.pStart = NULL; |
990 |
InternalDecompressionBuffer.Size = 0; |
991 |
} |
992 |
if (FrameTable) delete[] FrameTable; |
993 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
994 |
} |
995 |
|
996 |
|
997 |
|
998 |
// *************** DimensionRegion *************** |
999 |
// * |
1000 |
|
1001 |
uint DimensionRegion::Instances = 0; |
1002 |
DimensionRegion::VelocityTableMap* DimensionRegion::pVelocityTables = NULL; |
1003 |
|
1004 |
DimensionRegion::DimensionRegion(RIFF::List* _3ewl) : DLS::Sampler(_3ewl) { |
1005 |
Instances++; |
1006 |
|
1007 |
memcpy(&Crossfade, &SamplerOptions, 4); |
1008 |
if (!pVelocityTables) pVelocityTables = new VelocityTableMap; |
1009 |
|
1010 |
RIFF::Chunk* _3ewa = _3ewl->GetSubChunk(CHUNK_ID_3EWA); |
1011 |
_3ewa->ReadInt32(); // unknown, always 0x0000008C ? |
1012 |
LFO3Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1013 |
EG3Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1014 |
_3ewa->ReadInt16(); // unknown |
1015 |
LFO1InternalDepth = _3ewa->ReadUint16(); |
1016 |
_3ewa->ReadInt16(); // unknown |
1017 |
LFO3InternalDepth = _3ewa->ReadInt16(); |
1018 |
_3ewa->ReadInt16(); // unknown |
1019 |
LFO1ControlDepth = _3ewa->ReadUint16(); |
1020 |
_3ewa->ReadInt16(); // unknown |
1021 |
LFO3ControlDepth = _3ewa->ReadInt16(); |
1022 |
EG1Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1023 |
EG1Decay1 = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1024 |
_3ewa->ReadInt16(); // unknown |
1025 |
EG1Sustain = _3ewa->ReadUint16(); |
1026 |
EG1Release = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1027 |
EG1Controller = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8())); |
1028 |
uint8_t eg1ctrloptions = _3ewa->ReadUint8(); |
1029 |
EG1ControllerInvert = eg1ctrloptions & 0x01; |
1030 |
EG1ControllerAttackInfluence = GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(eg1ctrloptions); |
1031 |
EG1ControllerDecayInfluence = GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(eg1ctrloptions); |
1032 |
EG1ControllerReleaseInfluence = GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(eg1ctrloptions); |
1033 |
EG2Controller = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8())); |
1034 |
uint8_t eg2ctrloptions = _3ewa->ReadUint8(); |
1035 |
EG2ControllerInvert = eg2ctrloptions & 0x01; |
1036 |
EG2ControllerAttackInfluence = GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(eg2ctrloptions); |
1037 |
EG2ControllerDecayInfluence = GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(eg2ctrloptions); |
1038 |
EG2ControllerReleaseInfluence = GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(eg2ctrloptions); |
1039 |
LFO1Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1040 |
EG2Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1041 |
EG2Decay1 = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1042 |
_3ewa->ReadInt16(); // unknown |
1043 |
EG2Sustain = _3ewa->ReadUint16(); |
1044 |
EG2Release = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1045 |
_3ewa->ReadInt16(); // unknown |
1046 |
LFO2ControlDepth = _3ewa->ReadUint16(); |
1047 |
LFO2Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32()); |
1048 |
_3ewa->ReadInt16(); // unknown |
1049 |
LFO2InternalDepth = _3ewa->ReadUint16(); |
1050 |
int32_t eg1decay2 = _3ewa->ReadInt32(); |
1051 |
EG1Decay2 = (double) GIG_EXP_DECODE(eg1decay2); |
1052 |
EG1InfiniteSustain = (eg1decay2 == 0x7fffffff); |
1053 |
_3ewa->ReadInt16(); // unknown |
1054 |
EG1PreAttack = _3ewa->ReadUint16(); |
1055 |
int32_t eg2decay2 = _3ewa->ReadInt32(); |
1056 |
EG2Decay2 = (double) GIG_EXP_DECODE(eg2decay2); |
1057 |
EG2InfiniteSustain = (eg2decay2 == 0x7fffffff); |
1058 |
_3ewa->ReadInt16(); // unknown |
1059 |
EG2PreAttack = _3ewa->ReadUint16(); |
1060 |
uint8_t velocityresponse = _3ewa->ReadUint8(); |
1061 |
if (velocityresponse < 5) { |
1062 |
VelocityResponseCurve = curve_type_nonlinear; |
1063 |
VelocityResponseDepth = velocityresponse; |
1064 |
} |
1065 |
else if (velocityresponse < 10) { |
1066 |
VelocityResponseCurve = curve_type_linear; |
1067 |
VelocityResponseDepth = velocityresponse - 5; |
1068 |
} |
1069 |
else if (velocityresponse < 15) { |
1070 |
VelocityResponseCurve = curve_type_special; |
1071 |
VelocityResponseDepth = velocityresponse - 10; |
1072 |
} |
1073 |
else { |
1074 |
VelocityResponseCurve = curve_type_unknown; |
1075 |
VelocityResponseDepth = 0; |
1076 |
} |
1077 |
uint8_t releasevelocityresponse = _3ewa->ReadUint8(); |
1078 |
if (releasevelocityresponse < 5) { |
1079 |
ReleaseVelocityResponseCurve = curve_type_nonlinear; |
1080 |
ReleaseVelocityResponseDepth = releasevelocityresponse; |
1081 |
} |
1082 |
else if (releasevelocityresponse < 10) { |
1083 |
ReleaseVelocityResponseCurve = curve_type_linear; |
1084 |
ReleaseVelocityResponseDepth = releasevelocityresponse - 5; |
1085 |
} |
1086 |
else if (releasevelocityresponse < 15) { |
1087 |
ReleaseVelocityResponseCurve = curve_type_special; |
1088 |
ReleaseVelocityResponseDepth = releasevelocityresponse - 10; |
1089 |
} |
1090 |
else { |
1091 |
ReleaseVelocityResponseCurve = curve_type_unknown; |
1092 |
ReleaseVelocityResponseDepth = 0; |
1093 |
} |
1094 |
VelocityResponseCurveScaling = _3ewa->ReadUint8(); |
1095 |
AttenuationControllerThreshold = _3ewa->ReadInt8(); |
1096 |
_3ewa->ReadInt32(); // unknown |
1097 |
SampleStartOffset = (uint16_t) _3ewa->ReadInt16(); |
1098 |
_3ewa->ReadInt16(); // unknown |
1099 |
uint8_t pitchTrackDimensionBypass = _3ewa->ReadInt8(); |
1100 |
PitchTrack = GIG_PITCH_TRACK_EXTRACT(pitchTrackDimensionBypass); |
1101 |
if (pitchTrackDimensionBypass & 0x10) DimensionBypass = dim_bypass_ctrl_94; |
1102 |
else if (pitchTrackDimensionBypass & 0x20) DimensionBypass = dim_bypass_ctrl_95; |
1103 |
else DimensionBypass = dim_bypass_ctrl_none; |
1104 |
uint8_t pan = _3ewa->ReadUint8(); |
1105 |
Pan = (pan < 64) ? pan : -((int)pan - 63); // signed 7 bit -> signed 8 bit |
1106 |
SelfMask = _3ewa->ReadInt8() & 0x01; |
1107 |
_3ewa->ReadInt8(); // unknown |
1108 |
uint8_t lfo3ctrl = _3ewa->ReadUint8(); |
1109 |
LFO3Controller = static_cast<lfo3_ctrl_t>(lfo3ctrl & 0x07); // lower 3 bits |
1110 |
LFO3Sync = lfo3ctrl & 0x20; // bit 5 |
1111 |
InvertAttenuationController = lfo3ctrl & 0x80; // bit 7 |
1112 |
AttenuationController = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8())); |
1113 |
uint8_t lfo2ctrl = _3ewa->ReadUint8(); |
1114 |
LFO2Controller = static_cast<lfo2_ctrl_t>(lfo2ctrl & 0x07); // lower 3 bits |
1115 |
LFO2FlipPhase = lfo2ctrl & 0x80; // bit 7 |
1116 |
LFO2Sync = lfo2ctrl & 0x20; // bit 5 |
1117 |
bool extResonanceCtrl = lfo2ctrl & 0x40; // bit 6 |
1118 |
uint8_t lfo1ctrl = _3ewa->ReadUint8(); |
1119 |
LFO1Controller = static_cast<lfo1_ctrl_t>(lfo1ctrl & 0x07); // lower 3 bits |
1120 |
LFO1FlipPhase = lfo1ctrl & 0x80; // bit 7 |
1121 |
LFO1Sync = lfo1ctrl & 0x40; // bit 6 |
1122 |
VCFResonanceController = (extResonanceCtrl) ? static_cast<vcf_res_ctrl_t>(GIG_VCF_RESONANCE_CTRL_EXTRACT(lfo1ctrl)) |
1123 |
: vcf_res_ctrl_none; |
1124 |
uint16_t eg3depth = _3ewa->ReadUint16(); |
1125 |
EG3Depth = (eg3depth <= 1200) ? eg3depth /* positives */ |
1126 |
: (-1) * (int16_t) ((eg3depth ^ 0xffff) + 1); /* binary complementary for negatives */ |
1127 |
_3ewa->ReadInt16(); // unknown |
1128 |
ChannelOffset = _3ewa->ReadUint8() / 4; |
1129 |
uint8_t regoptions = _3ewa->ReadUint8(); |
1130 |
MSDecode = regoptions & 0x01; // bit 0 |
1131 |
SustainDefeat = regoptions & 0x02; // bit 1 |
1132 |
_3ewa->ReadInt16(); // unknown |
1133 |
VelocityUpperLimit = _3ewa->ReadInt8(); |
1134 |
_3ewa->ReadInt8(); // unknown |
1135 |
_3ewa->ReadInt16(); // unknown |
1136 |
ReleaseTriggerDecay = _3ewa->ReadUint8(); // release trigger decay |
1137 |
_3ewa->ReadInt8(); // unknown |
1138 |
_3ewa->ReadInt8(); // unknown |
1139 |
EG1Hold = _3ewa->ReadUint8() & 0x80; // bit 7 |
1140 |
uint8_t vcfcutoff = _3ewa->ReadUint8(); |
1141 |
VCFEnabled = vcfcutoff & 0x80; // bit 7 |
1142 |
VCFCutoff = vcfcutoff & 0x7f; // lower 7 bits |
1143 |
VCFCutoffController = static_cast<vcf_cutoff_ctrl_t>(_3ewa->ReadUint8()); |
1144 |
VCFVelocityScale = _3ewa->ReadUint8(); |
1145 |
_3ewa->ReadInt8(); // unknown |
1146 |
uint8_t vcfresonance = _3ewa->ReadUint8(); |
1147 |
VCFResonance = vcfresonance & 0x7f; // lower 7 bits |
1148 |
VCFResonanceDynamic = !(vcfresonance & 0x80); // bit 7 |
1149 |
uint8_t vcfbreakpoint = _3ewa->ReadUint8(); |
1150 |
VCFKeyboardTracking = vcfbreakpoint & 0x80; // bit 7 |
1151 |
VCFKeyboardTrackingBreakpoint = vcfbreakpoint & 0x7f; // lower 7 bits |
1152 |
uint8_t vcfvelocity = _3ewa->ReadUint8(); |
1153 |
VCFVelocityDynamicRange = vcfvelocity % 5; |
1154 |
VCFVelocityCurve = static_cast<curve_type_t>(vcfvelocity / 5); |
1155 |
VCFType = static_cast<vcf_type_t>(_3ewa->ReadUint8()); |
1156 |
if (VCFType == vcf_type_lowpass) { |
1157 |
if (lfo3ctrl & 0x40) // bit 6 |
1158 |
VCFType = vcf_type_lowpassturbo; |
1159 |
} |
1160 |
|
1161 |
// get the corresponding velocity->volume table from the table map or create & calculate that table if it doesn't exist yet |
1162 |
uint32_t tableKey = (VelocityResponseCurve<<16) | (VelocityResponseDepth<<8) | VelocityResponseCurveScaling; |
1163 |
if (pVelocityTables->count(tableKey)) { // if key exists |
1164 |
pVelocityAttenuationTable = (*pVelocityTables)[tableKey]; |
1165 |
} |
1166 |
else { |
1167 |
pVelocityAttenuationTable = |
1168 |
CreateVelocityTable(VelocityResponseCurve, |
1169 |
VelocityResponseDepth, |
1170 |
VelocityResponseCurveScaling); |
1171 |
(*pVelocityTables)[tableKey] = pVelocityAttenuationTable; // put the new table into the tables map |
1172 |
} |
1173 |
|
1174 |
SampleAttenuation = pow(10.0, -Gain / (20.0 * 655360)); |
1175 |
} |
1176 |
|
1177 |
leverage_ctrl_t DimensionRegion::DecodeLeverageController(_lev_ctrl_t EncodedController) { |
1178 |
leverage_ctrl_t decodedcontroller; |
1179 |
switch (EncodedController) { |
1180 |
// special controller |
1181 |
case _lev_ctrl_none: |
1182 |
decodedcontroller.type = leverage_ctrl_t::type_none; |
1183 |
decodedcontroller.controller_number = 0; |
1184 |
break; |
1185 |
case _lev_ctrl_velocity: |
1186 |
decodedcontroller.type = leverage_ctrl_t::type_velocity; |
1187 |
decodedcontroller.controller_number = 0; |
1188 |
break; |
1189 |
case _lev_ctrl_channelaftertouch: |
1190 |
decodedcontroller.type = leverage_ctrl_t::type_channelaftertouch; |
1191 |
decodedcontroller.controller_number = 0; |
1192 |
break; |
1193 |
|
1194 |
// ordinary MIDI control change controller |
1195 |
case _lev_ctrl_modwheel: |
1196 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1197 |
decodedcontroller.controller_number = 1; |
1198 |
break; |
1199 |
case _lev_ctrl_breath: |
1200 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1201 |
decodedcontroller.controller_number = 2; |
1202 |
break; |
1203 |
case _lev_ctrl_foot: |
1204 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1205 |
decodedcontroller.controller_number = 4; |
1206 |
break; |
1207 |
case _lev_ctrl_effect1: |
1208 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1209 |
decodedcontroller.controller_number = 12; |
1210 |
break; |
1211 |
case _lev_ctrl_effect2: |
1212 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1213 |
decodedcontroller.controller_number = 13; |
1214 |
break; |
1215 |
case _lev_ctrl_genpurpose1: |
1216 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1217 |
decodedcontroller.controller_number = 16; |
1218 |
break; |
1219 |
case _lev_ctrl_genpurpose2: |
1220 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1221 |
decodedcontroller.controller_number = 17; |
1222 |
break; |
1223 |
case _lev_ctrl_genpurpose3: |
1224 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1225 |
decodedcontroller.controller_number = 18; |
1226 |
break; |
1227 |
case _lev_ctrl_genpurpose4: |
1228 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1229 |
decodedcontroller.controller_number = 19; |
1230 |
break; |
1231 |
case _lev_ctrl_portamentotime: |
1232 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1233 |
decodedcontroller.controller_number = 5; |
1234 |
break; |
1235 |
case _lev_ctrl_sustainpedal: |
1236 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1237 |
decodedcontroller.controller_number = 64; |
1238 |
break; |
1239 |
case _lev_ctrl_portamento: |
1240 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1241 |
decodedcontroller.controller_number = 65; |
1242 |
break; |
1243 |
case _lev_ctrl_sostenutopedal: |
1244 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1245 |
decodedcontroller.controller_number = 66; |
1246 |
break; |
1247 |
case _lev_ctrl_softpedal: |
1248 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1249 |
decodedcontroller.controller_number = 67; |
1250 |
break; |
1251 |
case _lev_ctrl_genpurpose5: |
1252 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1253 |
decodedcontroller.controller_number = 80; |
1254 |
break; |
1255 |
case _lev_ctrl_genpurpose6: |
1256 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1257 |
decodedcontroller.controller_number = 81; |
1258 |
break; |
1259 |
case _lev_ctrl_genpurpose7: |
1260 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1261 |
decodedcontroller.controller_number = 82; |
1262 |
break; |
1263 |
case _lev_ctrl_genpurpose8: |
1264 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1265 |
decodedcontroller.controller_number = 83; |
1266 |
break; |
1267 |
case _lev_ctrl_effect1depth: |
1268 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1269 |
decodedcontroller.controller_number = 91; |
1270 |
break; |
1271 |
case _lev_ctrl_effect2depth: |
1272 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1273 |
decodedcontroller.controller_number = 92; |
1274 |
break; |
1275 |
case _lev_ctrl_effect3depth: |
1276 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1277 |
decodedcontroller.controller_number = 93; |
1278 |
break; |
1279 |
case _lev_ctrl_effect4depth: |
1280 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1281 |
decodedcontroller.controller_number = 94; |
1282 |
break; |
1283 |
case _lev_ctrl_effect5depth: |
1284 |
decodedcontroller.type = leverage_ctrl_t::type_controlchange; |
1285 |
decodedcontroller.controller_number = 95; |
1286 |
break; |
1287 |
|
1288 |
// unknown controller type |
1289 |
default: |
1290 |
throw gig::Exception("Unknown leverage controller type."); |
1291 |
} |
1292 |
return decodedcontroller; |
1293 |
} |
1294 |
|
1295 |
DimensionRegion::~DimensionRegion() { |
1296 |
Instances--; |
1297 |
if (!Instances) { |
1298 |
// delete the velocity->volume tables |
1299 |
VelocityTableMap::iterator iter; |
1300 |
for (iter = pVelocityTables->begin(); iter != pVelocityTables->end(); iter++) { |
1301 |
double* pTable = iter->second; |
1302 |
if (pTable) delete[] pTable; |
1303 |
} |
1304 |
pVelocityTables->clear(); |
1305 |
delete pVelocityTables; |
1306 |
pVelocityTables = NULL; |
1307 |
} |
1308 |
} |
1309 |
|
1310 |
/** |
1311 |
* Returns the correct amplitude factor for the given \a MIDIKeyVelocity. |
1312 |
* All involved parameters (VelocityResponseCurve, VelocityResponseDepth |
1313 |
* and VelocityResponseCurveScaling) involved are taken into account to |
1314 |
* calculate the amplitude factor. Use this method when a key was |
1315 |
* triggered to get the volume with which the sample should be played |
1316 |
* back. |
1317 |
* |
1318 |
* @param MIDIKeyVelocity MIDI velocity value of the triggered key (between 0 and 127) |
1319 |
* @returns amplitude factor (between 0.0 and 1.0) |
1320 |
*/ |
1321 |
double DimensionRegion::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) { |
1322 |
return pVelocityAttenuationTable[MIDIKeyVelocity]; |
1323 |
} |
1324 |
|
1325 |
double* DimensionRegion::CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling) { |
1326 |
|
1327 |
// line-segment approximations of the 15 velocity curves |
1328 |
|
1329 |
// linear |
1330 |
const int lin0[] = { 1, 1, 127, 127 }; |
1331 |
const int lin1[] = { 1, 21, 127, 127 }; |
1332 |
const int lin2[] = { 1, 45, 127, 127 }; |
1333 |
const int lin3[] = { 1, 74, 127, 127 }; |
1334 |
const int lin4[] = { 1, 127, 127, 127 }; |
1335 |
|
1336 |
// non-linear |
1337 |
const int non0[] = { 1, 4, 24, 5, 57, 17, 92, 57, 122, 127, 127, 127 }; |
1338 |
const int non1[] = { 1, 4, 46, 9, 93, 56, 118, 106, 123, 127, |
1339 |
127, 127 }; |
1340 |
const int non2[] = { 1, 4, 46, 9, 57, 20, 102, 107, 107, 127, |
1341 |
127, 127 }; |
1342 |
const int non3[] = { 1, 15, 10, 19, 67, 73, 80, 80, 90, 98, 98, 127, |
1343 |
127, 127 }; |
1344 |
const int non4[] = { 1, 25, 33, 57, 82, 81, 92, 127, 127, 127 }; |
1345 |
|
1346 |
// special |
1347 |
const int spe0[] = { 1, 2, 76, 10, 90, 15, 95, 20, 99, 28, 103, 44, |
1348 |
113, 127, 127, 127 }; |
1349 |
const int spe1[] = { 1, 2, 27, 5, 67, 18, 89, 29, 95, 35, 107, 67, |
1350 |
118, 127, 127, 127 }; |
1351 |
const int spe2[] = { 1, 1, 33, 1, 53, 5, 61, 13, 69, 32, 79, 74, |
1352 |
85, 90, 91, 127, 127, 127 }; |
1353 |
const int spe3[] = { 1, 32, 28, 35, 66, 48, 89, 59, 95, 65, 99, 73, |
1354 |
117, 127, 127, 127 }; |
1355 |
const int spe4[] = { 1, 4, 23, 5, 49, 13, 57, 17, 92, 57, 122, 127, |
1356 |
127, 127 }; |
1357 |
|
1358 |
const int* const curves[] = { non0, non1, non2, non3, non4, |
1359 |
lin0, lin1, lin2, lin3, lin4, |
1360 |
spe0, spe1, spe2, spe3, spe4 }; |
1361 |
|
1362 |
double* const table = new double[128]; |
1363 |
|
1364 |
const int* curve = curves[curveType * 5 + depth]; |
1365 |
const int s = scaling == 0 ? 20 : scaling; // 0 or 20 means no scaling |
1366 |
|
1367 |
table[0] = 0; |
1368 |
for (int x = 1 ; x < 128 ; x++) { |
1369 |
|
1370 |
if (x > curve[2]) curve += 2; |
1371 |
double y = curve[1] + (x - curve[0]) * |
1372 |
(double(curve[3] - curve[1]) / (curve[2] - curve[0])); |
1373 |
y = y / 127; |
1374 |
|
1375 |
// Scale up for s > 20, down for s < 20. When |
1376 |
// down-scaling, the curve still ends at 1.0. |
1377 |
if (s < 20 && y >= 0.5) |
1378 |
y = y / ((2 - 40.0 / s) * y + 40.0 / s - 1); |
1379 |
else |
1380 |
y = y * (s / 20.0); |
1381 |
if (y > 1) y = 1; |
1382 |
|
1383 |
table[x] = y; |
1384 |
} |
1385 |
return table; |
1386 |
} |
1387 |
|
1388 |
|
1389 |
// *************** Region *************** |
1390 |
// * |
1391 |
|
1392 |
Region::Region(Instrument* pInstrument, RIFF::List* rgnList) : DLS::Region((DLS::Instrument*) pInstrument, rgnList) { |
1393 |
// Initialization |
1394 |
Dimensions = 0; |
1395 |
for (int i = 0; i < 256; i++) { |
1396 |
pDimensionRegions[i] = NULL; |
1397 |
} |
1398 |
Layers = 1; |
1399 |
File* file = (File*) GetParent()->GetParent(); |
1400 |
int dimensionBits = (file->pVersion && file->pVersion->major == 3) ? 8 : 5; |
1401 |
|
1402 |
// Actual Loading |
1403 |
|
1404 |
LoadDimensionRegions(rgnList); |
1405 |
|
1406 |
RIFF::Chunk* _3lnk = rgnList->GetSubChunk(CHUNK_ID_3LNK); |
1407 |
if (_3lnk) { |
1408 |
DimensionRegions = _3lnk->ReadUint32(); |
1409 |
for (int i = 0; i < dimensionBits; i++) { |
1410 |
dimension_t dimension = static_cast<dimension_t>(_3lnk->ReadUint8()); |
1411 |
uint8_t bits = _3lnk->ReadUint8(); |
1412 |
if (dimension == dimension_none) { // inactive dimension |
1413 |
pDimensionDefinitions[i].dimension = dimension_none; |
1414 |
pDimensionDefinitions[i].bits = 0; |
1415 |
pDimensionDefinitions[i].zones = 0; |
1416 |
pDimensionDefinitions[i].split_type = split_type_bit; |
1417 |
pDimensionDefinitions[i].ranges = NULL; |
1418 |
pDimensionDefinitions[i].zone_size = 0; |
1419 |
} |
1420 |
else { // active dimension |
1421 |
pDimensionDefinitions[i].dimension = dimension; |
1422 |
pDimensionDefinitions[i].bits = bits; |
1423 |
pDimensionDefinitions[i].zones = 0x01 << bits; // = pow(2,bits) |
1424 |
pDimensionDefinitions[i].split_type = (dimension == dimension_layer || |
1425 |
dimension == dimension_samplechannel || |
1426 |
dimension == dimension_releasetrigger || |
1427 |
dimension == dimension_roundrobin || |
1428 |
dimension == dimension_random) ? split_type_bit |
1429 |
: split_type_normal; |
1430 |
pDimensionDefinitions[i].ranges = NULL; // it's not possible to check velocity dimensions for custom defined ranges at this point |
1431 |
pDimensionDefinitions[i].zone_size = |
1432 |
(pDimensionDefinitions[i].split_type == split_type_normal) ? 128 / pDimensionDefinitions[i].zones |
1433 |
: 0; |
1434 |
Dimensions++; |
1435 |
|
1436 |
// if this is a layer dimension, remember the amount of layers |
1437 |
if (dimension == dimension_layer) Layers = pDimensionDefinitions[i].zones; |
1438 |
} |
1439 |
_3lnk->SetPos(6, RIFF::stream_curpos); // jump forward to next dimension definition |
1440 |
} |
1441 |
|
1442 |
// check velocity dimension (if there is one) for custom defined zone ranges |
1443 |
for (uint i = 0; i < Dimensions; i++) { |
1444 |
dimension_def_t* pDimDef = pDimensionDefinitions + i; |
1445 |
if (pDimDef->dimension == dimension_velocity) { |
1446 |
if (pDimensionRegions[0]->VelocityUpperLimit == 0) { |
1447 |
// no custom defined ranges |
1448 |
pDimDef->split_type = split_type_normal; |
1449 |
pDimDef->ranges = NULL; |
1450 |
} |
1451 |
else { // custom defined ranges |
1452 |
pDimDef->split_type = split_type_customvelocity; |
1453 |
pDimDef->ranges = new range_t[pDimDef->zones]; |
1454 |
uint8_t bits[8] = { 0 }; |
1455 |
int previousUpperLimit = -1; |
1456 |
for (int velocityZone = 0; velocityZone < pDimDef->zones; velocityZone++) { |
1457 |
bits[i] = velocityZone; |
1458 |
DimensionRegion* pDimRegion = GetDimensionRegionByBit(bits); |
1459 |
|
1460 |
pDimDef->ranges[velocityZone].low = previousUpperLimit + 1; |
1461 |
pDimDef->ranges[velocityZone].high = pDimRegion->VelocityUpperLimit; |
1462 |
previousUpperLimit = pDimDef->ranges[velocityZone].high; |
1463 |
// fill velocity table |
1464 |
for (int i = pDimDef->ranges[velocityZone].low; i <= pDimDef->ranges[velocityZone].high; i++) { |
1465 |
VelocityTable[i] = velocityZone; |
1466 |
} |
1467 |
} |
1468 |
} |
1469 |
} |
1470 |
} |
1471 |
|
1472 |
// jump to start of the wave pool indices (if not already there) |
1473 |
File* file = (File*) GetParent()->GetParent(); |
1474 |
if (file->pVersion && file->pVersion->major == 3) |
1475 |
_3lnk->SetPos(68); // version 3 has a different 3lnk structure |
1476 |
else |
1477 |
_3lnk->SetPos(44); |
1478 |
|
1479 |
// load sample references |
1480 |
for (uint i = 0; i < DimensionRegions; i++) { |
1481 |
uint32_t wavepoolindex = _3lnk->ReadUint32(); |
1482 |
pDimensionRegions[i]->pSample = GetSampleFromWavePool(wavepoolindex); |
1483 |
} |
1484 |
} |
1485 |
else throw gig::Exception("Mandatory <3lnk> chunk not found."); |
1486 |
} |
1487 |
|
1488 |
void Region::LoadDimensionRegions(RIFF::List* rgn) { |
1489 |
RIFF::List* _3prg = rgn->GetSubList(LIST_TYPE_3PRG); |
1490 |
if (_3prg) { |
1491 |
int dimensionRegionNr = 0; |
1492 |
RIFF::List* _3ewl = _3prg->GetFirstSubList(); |
1493 |
while (_3ewl) { |
1494 |
if (_3ewl->GetListType() == LIST_TYPE_3EWL) { |
1495 |
pDimensionRegions[dimensionRegionNr] = new DimensionRegion(_3ewl); |
1496 |
dimensionRegionNr++; |
1497 |
} |
1498 |
_3ewl = _3prg->GetNextSubList(); |
1499 |
} |
1500 |
if (dimensionRegionNr == 0) throw gig::Exception("No dimension region found."); |
1501 |
} |
1502 |
} |
1503 |
|
1504 |
Region::~Region() { |
1505 |
for (uint i = 0; i < Dimensions; i++) { |
1506 |
if (pDimensionDefinitions[i].ranges) delete[] pDimensionDefinitions[i].ranges; |
1507 |
} |
1508 |
for (int i = 0; i < 256; i++) { |
1509 |
if (pDimensionRegions[i]) delete pDimensionRegions[i]; |
1510 |
} |
1511 |
} |
1512 |
|
1513 |
/** |
1514 |
* Use this method in your audio engine to get the appropriate dimension |
1515 |
* region with it's articulation data for the current situation. Just |
1516 |
* call the method with the current MIDI controller values and you'll get |
1517 |
* the DimensionRegion with the appropriate articulation data for the |
1518 |
* current situation (for this Region of course only). To do that you'll |
1519 |
* first have to look which dimensions with which controllers and in |
1520 |
* which order are defined for this Region when you load the .gig file. |
1521 |
* Special cases are e.g. layer or channel dimensions where you just put |
1522 |
* in the index numbers instead of a MIDI controller value (means 0 for |
1523 |
* left channel, 1 for right channel or 0 for layer 0, 1 for layer 1, |
1524 |
* etc.). |
1525 |
* |
1526 |
* @param DimValues MIDI controller values (0-127) for dimension 0 to 7 |
1527 |
* @returns adress to the DimensionRegion for the given situation |
1528 |
* @see pDimensionDefinitions |
1529 |
* @see Dimensions |
1530 |
*/ |
1531 |
DimensionRegion* Region::GetDimensionRegionByValue(const uint DimValues[8]) { |
1532 |
uint8_t bits[8] = { 0 }; |
1533 |
for (uint i = 0; i < Dimensions; i++) { |
1534 |
bits[i] = DimValues[i]; |
1535 |
switch (pDimensionDefinitions[i].split_type) { |
1536 |
case split_type_normal: |
1537 |
bits[i] /= pDimensionDefinitions[i].zone_size; |
1538 |
break; |
1539 |
case split_type_customvelocity: |
1540 |
bits[i] = VelocityTable[bits[i]]; |
1541 |
break; |
1542 |
case split_type_bit: // the value is already the sought dimension bit number |
1543 |
const uint8_t limiter_mask = (0xff << pDimensionDefinitions[i].bits) ^ 0xff; |
1544 |
bits[i] = bits[i] & limiter_mask; // just make sure the value don't uses more bits than allowed |
1545 |
break; |
1546 |
} |
1547 |
} |
1548 |
return GetDimensionRegionByBit(bits); |
1549 |
} |
1550 |
|
1551 |
/** |
1552 |
* Returns the appropriate DimensionRegion for the given dimension bit |
1553 |
* numbers (zone index). You usually use <i>GetDimensionRegionByValue</i> |
1554 |
* instead of calling this method directly! |
1555 |
* |
1556 |
* @param DimBits Bit numbers for dimension 0 to 7 |
1557 |
* @returns adress to the DimensionRegion for the given dimension |
1558 |
* bit numbers |
1559 |
* @see GetDimensionRegionByValue() |
1560 |
*/ |
1561 |
DimensionRegion* Region::GetDimensionRegionByBit(const uint8_t DimBits[8]) { |
1562 |
return pDimensionRegions[((((((DimBits[7] << pDimensionDefinitions[6].bits | DimBits[6]) |
1563 |
<< pDimensionDefinitions[5].bits | DimBits[5]) |
1564 |
<< pDimensionDefinitions[4].bits | DimBits[4]) |
1565 |
<< pDimensionDefinitions[3].bits | DimBits[3]) |
1566 |
<< pDimensionDefinitions[2].bits | DimBits[2]) |
1567 |
<< pDimensionDefinitions[1].bits | DimBits[1]) |
1568 |
<< pDimensionDefinitions[0].bits | DimBits[0]]; |
1569 |
} |
1570 |
|
1571 |
/** |
1572 |
* Returns pointer address to the Sample referenced with this region. |
1573 |
* This is the global Sample for the entire Region (not sure if this is |
1574 |
* actually used by the Gigasampler engine - I would only use the Sample |
1575 |
* referenced by the appropriate DimensionRegion instead of this sample). |
1576 |
* |
1577 |
* @returns address to Sample or NULL if there is no reference to a |
1578 |
* sample saved in the .gig file |
1579 |
*/ |
1580 |
Sample* Region::GetSample() { |
1581 |
if (pSample) return static_cast<gig::Sample*>(pSample); |
1582 |
else return static_cast<gig::Sample*>(pSample = GetSampleFromWavePool(WavePoolTableIndex)); |
1583 |
} |
1584 |
|
1585 |
Sample* Region::GetSampleFromWavePool(unsigned int WavePoolTableIndex, progress_t* pProgress) { |
1586 |
if ((int32_t)WavePoolTableIndex == -1) return NULL; |
1587 |
File* file = (File*) GetParent()->GetParent(); |
1588 |
unsigned long soughtoffset = file->pWavePoolTable[WavePoolTableIndex]; |
1589 |
Sample* sample = file->GetFirstSample(pProgress); |
1590 |
while (sample) { |
1591 |
if (sample->ulWavePoolOffset == soughtoffset) return static_cast<gig::Sample*>(pSample = sample); |
1592 |
sample = file->GetNextSample(); |
1593 |
} |
1594 |
return NULL; |
1595 |
} |
1596 |
|
1597 |
|
1598 |
|
1599 |
// *************** Instrument *************** |
1600 |
// * |
1601 |
|
1602 |
Instrument::Instrument(File* pFile, RIFF::List* insList, progress_t* pProgress) : DLS::Instrument((DLS::File*)pFile, insList) { |
1603 |
// Initialization |
1604 |
for (int i = 0; i < 128; i++) RegionKeyTable[i] = NULL; |
1605 |
RegionIndex = -1; |
1606 |
|
1607 |
// Loading |
1608 |
RIFF::List* lart = insList->GetSubList(LIST_TYPE_LART); |
1609 |
if (lart) { |
1610 |
RIFF::Chunk* _3ewg = lart->GetSubChunk(CHUNK_ID_3EWG); |
1611 |
if (_3ewg) { |
1612 |
EffectSend = _3ewg->ReadUint16(); |
1613 |
Attenuation = _3ewg->ReadInt32(); |
1614 |
FineTune = _3ewg->ReadInt16(); |
1615 |
PitchbendRange = _3ewg->ReadInt16(); |
1616 |
uint8_t dimkeystart = _3ewg->ReadUint8(); |
1617 |
PianoReleaseMode = dimkeystart & 0x01; |
1618 |
DimensionKeyRange.low = dimkeystart >> 1; |
1619 |
DimensionKeyRange.high = _3ewg->ReadUint8(); |
1620 |
} |
1621 |
else throw gig::Exception("Mandatory <3ewg> chunk not found."); |
1622 |
} |
1623 |
else throw gig::Exception("Mandatory <lart> list chunk not found."); |
1624 |
|
1625 |
RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN); |
1626 |
if (!lrgn) throw gig::Exception("Mandatory chunks in <ins > chunk not found."); |
1627 |
pRegions = new Region*[Regions]; |
1628 |
for (uint i = 0; i < Regions; i++) pRegions[i] = NULL; |
1629 |
RIFF::List* rgn = lrgn->GetFirstSubList(); |
1630 |
unsigned int iRegion = 0; |
1631 |
while (rgn) { |
1632 |
if (rgn->GetListType() == LIST_TYPE_RGN) { |
1633 |
__notify_progress(pProgress, (float) iRegion / (float) Regions); |
1634 |
pRegions[iRegion] = new Region(this, rgn); |
1635 |
iRegion++; |
1636 |
} |
1637 |
rgn = lrgn->GetNextSubList(); |
1638 |
} |
1639 |
|
1640 |
// Creating Region Key Table for fast lookup |
1641 |
for (uint iReg = 0; iReg < Regions; iReg++) { |
1642 |
for (int iKey = pRegions[iReg]->KeyRange.low; iKey <= pRegions[iReg]->KeyRange.high; iKey++) { |
1643 |
RegionKeyTable[iKey] = pRegions[iReg]; |
1644 |
} |
1645 |
} |
1646 |
|
1647 |
__notify_progress(pProgress, 1.0f); // notify done |
1648 |
} |
1649 |
|
1650 |
Instrument::~Instrument() { |
1651 |
for (uint i = 0; i < Regions; i++) { |
1652 |
if (pRegions) { |
1653 |
if (pRegions[i]) delete (pRegions[i]); |
1654 |
} |
1655 |
} |
1656 |
if (pRegions) delete[] pRegions; |
1657 |
} |
1658 |
|
1659 |
/** |
1660 |
* Returns the appropriate Region for a triggered note. |
1661 |
* |
1662 |
* @param Key MIDI Key number of triggered note / key (0 - 127) |
1663 |
* @returns pointer adress to the appropriate Region or NULL if there |
1664 |
* there is no Region defined for the given \a Key |
1665 |
*/ |
1666 |
Region* Instrument::GetRegion(unsigned int Key) { |
1667 |
if (!pRegions || Key > 127) return NULL; |
1668 |
return RegionKeyTable[Key]; |
1669 |
/*for (int i = 0; i < Regions; i++) { |
1670 |
if (Key <= pRegions[i]->KeyRange.high && |
1671 |
Key >= pRegions[i]->KeyRange.low) return pRegions[i]; |
1672 |
} |
1673 |
return NULL;*/ |
1674 |
} |
1675 |
|
1676 |
/** |
1677 |
* Returns the first Region of the instrument. You have to call this |
1678 |
* method once before you use GetNextRegion(). |
1679 |
* |
1680 |
* @returns pointer address to first region or NULL if there is none |
1681 |
* @see GetNextRegion() |
1682 |
*/ |
1683 |
Region* Instrument::GetFirstRegion() { |
1684 |
if (!Regions) return NULL; |
1685 |
RegionIndex = 1; |
1686 |
return pRegions[0]; |
1687 |
} |
1688 |
|
1689 |
/** |
1690 |
* Returns the next Region of the instrument. You have to call |
1691 |
* GetFirstRegion() once before you can use this method. By calling this |
1692 |
* method multiple times it iterates through the available Regions. |
1693 |
* |
1694 |
* @returns pointer address to the next region or NULL if end reached |
1695 |
* @see GetFirstRegion() |
1696 |
*/ |
1697 |
Region* Instrument::GetNextRegion() { |
1698 |
if (RegionIndex < 0 || uint32_t(RegionIndex) >= Regions) return NULL; |
1699 |
return pRegions[RegionIndex++]; |
1700 |
} |
1701 |
|
1702 |
|
1703 |
|
1704 |
// *************** File *************** |
1705 |
// * |
1706 |
|
1707 |
File::File(RIFF::File* pRIFF) : DLS::File(pRIFF) { |
1708 |
pSamples = NULL; |
1709 |
pInstruments = NULL; |
1710 |
} |
1711 |
|
1712 |
File::~File() { |
1713 |
// free samples |
1714 |
if (pSamples) { |
1715 |
SamplesIterator = pSamples->begin(); |
1716 |
while (SamplesIterator != pSamples->end() ) { |
1717 |
delete (*SamplesIterator); |
1718 |
SamplesIterator++; |
1719 |
} |
1720 |
pSamples->clear(); |
1721 |
delete pSamples; |
1722 |
|
1723 |
} |
1724 |
// free instruments |
1725 |
if (pInstruments) { |
1726 |
InstrumentsIterator = pInstruments->begin(); |
1727 |
while (InstrumentsIterator != pInstruments->end() ) { |
1728 |
delete (*InstrumentsIterator); |
1729 |
InstrumentsIterator++; |
1730 |
} |
1731 |
pInstruments->clear(); |
1732 |
delete pInstruments; |
1733 |
} |
1734 |
} |
1735 |
|
1736 |
Sample* File::GetFirstSample(progress_t* pProgress) { |
1737 |
if (!pSamples) LoadSamples(pProgress); |
1738 |
if (!pSamples) return NULL; |
1739 |
SamplesIterator = pSamples->begin(); |
1740 |
return static_cast<gig::Sample*>( (SamplesIterator != pSamples->end()) ? *SamplesIterator : NULL ); |
1741 |
} |
1742 |
|
1743 |
Sample* File::GetNextSample() { |
1744 |
if (!pSamples) return NULL; |
1745 |
SamplesIterator++; |
1746 |
return static_cast<gig::Sample*>( (SamplesIterator != pSamples->end()) ? *SamplesIterator : NULL ); |
1747 |
} |
1748 |
|
1749 |
void File::LoadSamples(progress_t* pProgress) { |
1750 |
RIFF::List* wvpl = pRIFF->GetSubList(LIST_TYPE_WVPL); |
1751 |
if (wvpl) { |
1752 |
// just for progress calculation |
1753 |
int iSampleIndex = 0; |
1754 |
int iTotalSamples = wvpl->CountSubLists(LIST_TYPE_WAVE); |
1755 |
|
1756 |
unsigned long wvplFileOffset = wvpl->GetFilePos(); |
1757 |
RIFF::List* wave = wvpl->GetFirstSubList(); |
1758 |
while (wave) { |
1759 |
if (wave->GetListType() == LIST_TYPE_WAVE) { |
1760 |
// notify current progress |
1761 |
const float subprogress = (float) iSampleIndex / (float) iTotalSamples; |
1762 |
__notify_progress(pProgress, subprogress); |
1763 |
|
1764 |
if (!pSamples) pSamples = new SampleList; |
1765 |
unsigned long waveFileOffset = wave->GetFilePos(); |
1766 |
pSamples->push_back(new Sample(this, wave, waveFileOffset - wvplFileOffset)); |
1767 |
|
1768 |
iSampleIndex++; |
1769 |
} |
1770 |
wave = wvpl->GetNextSubList(); |
1771 |
} |
1772 |
__notify_progress(pProgress, 1.0); // notify done |
1773 |
} |
1774 |
else throw gig::Exception("Mandatory <wvpl> chunk not found."); |
1775 |
} |
1776 |
|
1777 |
Instrument* File::GetFirstInstrument() { |
1778 |
if (!pInstruments) LoadInstruments(); |
1779 |
if (!pInstruments) return NULL; |
1780 |
InstrumentsIterator = pInstruments->begin(); |
1781 |
return (InstrumentsIterator != pInstruments->end()) ? *InstrumentsIterator : NULL; |
1782 |
} |
1783 |
|
1784 |
Instrument* File::GetNextInstrument() { |
1785 |
if (!pInstruments) return NULL; |
1786 |
InstrumentsIterator++; |
1787 |
return (InstrumentsIterator != pInstruments->end()) ? *InstrumentsIterator : NULL; |
1788 |
} |
1789 |
|
1790 |
/** |
1791 |
* Returns the instrument with the given index. |
1792 |
* |
1793 |
* @param index - number of the sought instrument (0..n) |
1794 |
* @param pProgress - optional: callback function for progress notification |
1795 |
* @returns sought instrument or NULL if there's no such instrument |
1796 |
*/ |
1797 |
Instrument* File::GetInstrument(uint index, progress_t* pProgress) { |
1798 |
if (!pInstruments) { |
1799 |
// TODO: hack - we simply load ALL samples here, it would have been done in the Region constructor anyway (ATM) |
1800 |
|
1801 |
// sample loading subtask |
1802 |
progress_t subprogress; |
1803 |
__divide_progress(pProgress, &subprogress, 3.0f, 0.0f); // randomly schedule 33% for this subtask |
1804 |
__notify_progress(&subprogress, 0.0f); |
1805 |
GetFirstSample(&subprogress); // now force all samples to be loaded |
1806 |
__notify_progress(&subprogress, 1.0f); |
1807 |
|
1808 |
// instrument loading subtask |
1809 |
if (pProgress && pProgress->callback) { |
1810 |
subprogress.__range_min = subprogress.__range_max; |
1811 |
subprogress.__range_max = pProgress->__range_max; // schedule remaining percentage for this subtask |
1812 |
} |
1813 |
__notify_progress(&subprogress, 0.0f); |
1814 |
LoadInstruments(&subprogress); |
1815 |
__notify_progress(&subprogress, 1.0f); |
1816 |
} |
1817 |
if (!pInstruments) return NULL; |
1818 |
InstrumentsIterator = pInstruments->begin(); |
1819 |
for (uint i = 0; InstrumentsIterator != pInstruments->end(); i++) { |
1820 |
if (i == index) return *InstrumentsIterator; |
1821 |
InstrumentsIterator++; |
1822 |
} |
1823 |
return NULL; |
1824 |
} |
1825 |
|
1826 |
void File::LoadInstruments(progress_t* pProgress) { |
1827 |
RIFF::List* lstInstruments = pRIFF->GetSubList(LIST_TYPE_LINS); |
1828 |
if (lstInstruments) { |
1829 |
int iInstrumentIndex = 0; |
1830 |
RIFF::List* lstInstr = lstInstruments->GetFirstSubList(); |
1831 |
while (lstInstr) { |
1832 |
if (lstInstr->GetListType() == LIST_TYPE_INS) { |
1833 |
// notify current progress |
1834 |
const float localProgress = (float) iInstrumentIndex / (float) Instruments; |
1835 |
__notify_progress(pProgress, localProgress); |
1836 |
|
1837 |
// divide local progress into subprogress for loading current Instrument |
1838 |
progress_t subprogress; |
1839 |
__divide_progress(pProgress, &subprogress, Instruments, iInstrumentIndex); |
1840 |
|
1841 |
if (!pInstruments) pInstruments = new InstrumentList; |
1842 |
pInstruments->push_back(new Instrument(this, lstInstr, &subprogress)); |
1843 |
|
1844 |
iInstrumentIndex++; |
1845 |
} |
1846 |
lstInstr = lstInstruments->GetNextSubList(); |
1847 |
} |
1848 |
__notify_progress(pProgress, 1.0); // notify done |
1849 |
} |
1850 |
else throw gig::Exception("Mandatory <lins> list chunk not found."); |
1851 |
} |
1852 |
|
1853 |
|
1854 |
|
1855 |
// *************** Exception *************** |
1856 |
// * |
1857 |
|
1858 |
Exception::Exception(String Message) : DLS::Exception(Message) { |
1859 |
} |
1860 |
|
1861 |
void Exception::PrintMessage() { |
1862 |
std::cout << "gig::Exception: " << Message << std::endl; |
1863 |
} |
1864 |
|
1865 |
} // namespace gig |