mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-26 03:37:53 +00:00
456 lines
12 KiB
C++
456 lines
12 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program 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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "sound/mods/infogrames.h"
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#include "common/endian.h"
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namespace Audio {
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Infogrames::Instruments::Instruments() {
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init();
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}
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Infogrames::Instruments::~Instruments() {
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if (_sampleData)
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delete[] _sampleData;
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}
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void Infogrames::Instruments::init() {
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int i;
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for (i = 0; i < 32; i++) {
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_samples[i].data = 0;
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_samples[i].dataRepeat = 0;
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_samples[i].length = 0;
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_samples[i].lengthRepeat = 0;
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}
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_count = 0;
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_sampleData = 0;
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}
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bool Infogrames::Instruments::load(Common::SeekableReadStream &ins) {
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int i;
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uint32 fsize;
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uint32 offset[32];
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uint32 offsetRepeat[32];
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uint32 dataOffset;
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unload();
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fsize = ins.readUint32BE();
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dataOffset = fsize;
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for (i = 0; (i < 32) && !ins.eos(); i++) {
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offset[i] = ins.readUint32BE();
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offsetRepeat[i] = ins.readUint32BE();
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if ((offset[i] > fsize) || (offsetRepeat[i] > fsize) ||
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(offset[i] < (ins.pos() + 4)) ||
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(offsetRepeat[i] < (ins.pos() + 4))) {
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// Definitely no real entry anymore
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ins.seek(-8, SEEK_CUR);
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break;
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}
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dataOffset = MIN(dataOffset, MIN(offset[i], offsetRepeat[i]));
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ins.skip(4); // Unknown
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_samples[i].length = ins.readUint16BE() * 2;
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_samples[i].lengthRepeat = ins.readUint16BE() * 2;
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}
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if (dataOffset >= fsize)
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return false;
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_count = i;
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_sampleData = new int8[fsize - dataOffset];
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ins.seek(dataOffset + 4);
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ins.read(_sampleData, fsize - dataOffset);
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for (i--; i >= 0; i--) {
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_samples[i].data = _sampleData + (offset[i] - dataOffset);
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_samples[i].dataRepeat = _sampleData + (offsetRepeat[i] - dataOffset);
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}
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return true;
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}
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void Infogrames::Instruments::unload(void) {
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if (_sampleData)
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delete[] _sampleData;
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init();
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}
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const uint8 Infogrames::tickCount[] =
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{2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96};
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const uint16 Infogrames::periods[] =
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{0x6ACC, 0x64CC, 0x5F25, 0x59CE, 0x54C3, 0x5003, 0x4B86, 0x4747, 0x4346,
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0x3F8B, 0x3BF3, 0x3892, 0x3568, 0x3269, 0x2F93, 0x2CEA, 0x2A66, 0x2801,
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0x2566, 0x23A5, 0x21AF, 0x1FC4, 0x1DFE, 0x1C4E, 0x1ABC, 0x1936, 0x17CC,
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0x1676, 0x1533, 0x1401, 0x12E4, 0x11D5, 0x10D4, 0x0FE3, 0x0EFE, 0x0E26,
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0x0D5B, 0x0C9B, 0x0BE5, 0x0B3B, 0x0A9B, 0x0A02, 0x0972, 0x08E9, 0x0869,
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0x07F1, 0x077F, 0x0713, 0x06AD, 0x064D, 0x05F2, 0x059D, 0x054D, 0x0500,
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0x04B8, 0x0475, 0x0435, 0x03F8, 0x03BF, 0x038A, 0x0356, 0x0326, 0x02F9,
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0x02CF, 0x02A6, 0x0280, 0x025C, 0x023A, 0x021A, 0x01FC, 0x01E0, 0x01C5,
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0x01AB, 0x0193, 0x017D, 0x0167, 0x0153, 0x0140, 0x012E, 0x011D, 0x010D,
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0x00FE, 0x00F0, 0x00E2, 0x00D6, 0x00CA, 0x00BE, 0x00B4, 0x00AA, 0x00A0,
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0x0097, 0x008F, 0x0087, 0x007F, 0x0078, 0x0070, 0x0060, 0x0050, 0x0040,
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0x0030, 0x0020, 0x0010, 0x0000, 0x0000, 0x0020, 0x2020, 0x2020, 0x2020,
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0x2020, 0x3030, 0x3030, 0x3020, 0x2020, 0x2020, 0x2020, 0x2020, 0x2020,
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0x2020, 0x2020, 0x2020, 0x2090, 0x4040, 0x4040, 0x4040, 0x4040, 0x4040,
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0x4040, 0x4040, 0x400C, 0x0C0C, 0x0C0C, 0x0C0C, 0x0C0C, 0x0C40, 0x4040,
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0x4040, 0x4040, 0x0909, 0x0909, 0x0909, 0x0101, 0x0101, 0x0101, 0x0101,
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0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x4040, 0x4040, 0x4040,
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0x0A0A, 0x0A0A, 0x0A0A, 0x0202, 0x0202, 0x0202, 0x0202, 0x0202, 0x0202,
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0x0202, 0x0202, 0x0202, 0x0202, 0x4040, 0x4040, 0x2000};
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Infogrames::Infogrames(Instruments &ins, bool stereo, int rate,
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int interruptFreq) : Paula(stereo, rate, interruptFreq) {
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_instruments = &ins;
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_data = 0;
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_repCount = -1;
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reset();
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}
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Infogrames::~Infogrames() {
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if (_data)
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delete[] _data;
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}
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void Infogrames::init() {
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int i;
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_volume = 0;
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_period = 0;
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_sample = 0;
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_speedCounter = _speed;
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for (i = 0; i < 4; i++) {
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_chn[i].cmds = 0;
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_chn[i].cmdBlocks = 0;
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_chn[i].volSlide.finetuneNeg = 0;
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_chn[i].volSlide.finetunePos = 0;
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_chn[i].volSlide.data = 0;
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_chn[i].volSlide.amount = 0;
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_chn[i].volSlide.dataOffset = 0;
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_chn[i].volSlide.flags = 0;
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_chn[i].volSlide.curDelay1 = 0;
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_chn[i].volSlide.curDelay2 = 0;
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_chn[i].periodSlide.finetuneNeg = 0;
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_chn[i].periodSlide.finetunePos = 0;
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_chn[i].periodSlide.data = 0;
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_chn[i].periodSlide.amount = 0;
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_chn[i].periodSlide.dataOffset = 0;
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_chn[i].periodSlide.flags = 0;
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_chn[i].periodSlide.curDelay1 = 0;
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_chn[i].periodSlide.curDelay2 = 0;
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_chn[i].period = 0;
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_chn[i].flags = 0x81;
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_chn[i].ticks = 0;
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_chn[i].tickCount = 0;
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_chn[i].periodMod = 0;
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}
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_end = (_data == 0);
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}
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void Infogrames::reset() {
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int i;
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stopPlay();
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init();
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_volSlideBlocks = 0;
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_periodSlideBlocks = 0;
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_subSong = 0;
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_cmdBlocks = 0;
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_speedCounter = 0;
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_speed = 0;
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for (i = 0; i < 4; i++)
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_chn[i].cmdBlockIndices = 0;
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}
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bool Infogrames::load(Common::SeekableReadStream &dum) {
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int subSong = 0;
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int i;
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uint32 size;
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size = dum.size();
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if (size < 20)
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return false;
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_data = new uint8[size];
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dum.seek(0);
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dum.read(_data, size);
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Common::MemoryReadStream dataStr(_data, size);
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dataStr.seek(subSong * 2);
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dataStr.seek(dataStr.readUint16BE());
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_subSong = _data + dataStr.pos();
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if (_subSong > (_data + size))
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return false;
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_speedCounter = dataStr.readUint16BE();
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_speed = _speedCounter;
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_volSlideBlocks = _subSong + dataStr.readUint16BE();
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_periodSlideBlocks = _subSong + dataStr.readUint16BE();
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for (i = 0; i < 4; i++) {
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_chn[i].cmdBlockIndices = _subSong + dataStr.readUint16BE();
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_chn[i].flags = 0x81;
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}
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_cmdBlocks = _data + dataStr.pos() + 2;
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if ((_volSlideBlocks > (_data + size)) ||
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(_periodSlideBlocks > (_data + size)) ||
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(_chn[0].cmdBlockIndices > (_data + size)) ||
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(_chn[1].cmdBlockIndices > (_data + size)) ||
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(_chn[2].cmdBlockIndices > (_data + size)) ||
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(_chn[3].cmdBlockIndices > (_data + size)) ||
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(_cmdBlocks > (_data + size)))
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return false;
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startPaula();
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return true;
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}
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void Infogrames::unload(void) {
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stopPlay();
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delete[] _data;
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_data = 0;
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clearVoices();
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reset();
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}
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void Infogrames::getNextSample(Channel &chn) {
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byte *data;
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byte cmdBlock = 0;
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uint16 cmd;
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bool cont = false;
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if (chn.flags & 64)
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return;
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if (chn.flags & 1) {
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chn.flags &= ~1;
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chn.cmdBlocks = chn.cmdBlockIndices;
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} else {
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chn.flags &= ~1;
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if (_speedCounter == 0)
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chn.ticks--;
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if (chn.ticks != 0) {
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_volume = MAX((int16) 0, tune(chn.volSlide, 0));
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_period = tune(chn.periodSlide, chn.period);
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return;
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} else {
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chn.ticks = chn.tickCount;
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cont = true;
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}
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}
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while (1) {
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while (cont || ((cmdBlock = *chn.cmdBlocks) != 0xFF)) {
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if (!cont) {
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chn.cmdBlocks++;
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chn.cmds = _subSong +
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READ_BE_UINT16(_cmdBlocks + (cmdBlock * 2));
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} else
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cont = false;
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while ((cmd = *chn.cmds) != 0xFF) {
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chn.cmds++;
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if (cmd & 128)
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{
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switch (cmd & 0xE0) {
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case 0x80: // 100xxxxx - Set ticks
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chn.ticks = tickCount[cmd & 0xF];
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chn.tickCount = tickCount[cmd & 0xF];
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break;
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case 0xA0: // 101xxxxx - Set sample
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_sample = cmd & 0x1F;
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break;
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case 0xC0: // 110xxxxx - Set volume slide/finetune
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data = _volSlideBlocks + (cmd & 0x1F) * 13;
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chn.volSlide.flags = (*data & 0x80) | 1;
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chn.volSlide.amount = *data++ & 0x7F;
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chn.volSlide.data = data;
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chn.volSlide.dataOffset = 0;
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chn.volSlide.finetunePos = 0;
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chn.volSlide.finetuneNeg = 0;
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chn.volSlide.curDelay1 = 0;
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chn.volSlide.curDelay2 = 0;
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break;
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case 0xE0: // 111xxxxx - Extended
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switch(cmd & 0x1F) {
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case 0: // Set period modifier
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chn.periodMod = (int8) *chn.cmds++;
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break;
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case 1: // Set continuous period slide
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chn.periodSlide.data =
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_periodSlideBlocks + *chn.cmds++ * 13 + 1;
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chn.periodSlide.amount = 0;
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chn.periodSlide.dataOffset = 0;
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chn.periodSlide.finetunePos = 0;
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chn.periodSlide.finetuneNeg = 0;
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chn.periodSlide.curDelay1 = 0;
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chn.periodSlide.curDelay2 = 0;
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chn.periodSlide.flags = 0x81;
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break;
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case 2: // Set non-continuous period slide
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chn.periodSlide.data =
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_periodSlideBlocks + *chn.cmds++ * 13 + 1;
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chn.periodSlide.amount = 0;
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chn.periodSlide.dataOffset = 0;
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chn.periodSlide.finetunePos = 0;
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chn.periodSlide.finetuneNeg = 0;
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chn.periodSlide.curDelay1 = 0;
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chn.periodSlide.curDelay2 = 0;
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chn.periodSlide.flags = 1;
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break;
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case 3: // NOP
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break;
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default:
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warning("Unknown Infogrames command: %X", cmd);
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}
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break;
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}
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} else { // 0xxxxxxx - Set period
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if (cmd != 0)
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cmd += chn.periodMod;
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chn.period = periods[cmd];
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chn.volSlide.dataOffset = 0;
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chn.volSlide.finetunePos = 0;
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chn.volSlide.finetuneNeg = 0;
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chn.volSlide.curDelay1 = 0;
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chn.volSlide.curDelay2 = 0;
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chn.volSlide.flags |= 1;
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chn.volSlide.flags &= ~4;
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chn.periodSlide.dataOffset = 0;
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chn.periodSlide.finetunePos = 0;
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chn.periodSlide.finetuneNeg = 0;
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chn.periodSlide.curDelay1 = 0;
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chn.periodSlide.curDelay2 = 0;
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chn.periodSlide.flags |= 1;
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chn.periodSlide.flags &= ~4;
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_volume = MAX((int16) 0, tune(chn.volSlide, 0));
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_period = tune(chn.periodSlide, chn.period);
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return;
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}
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}
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}
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if (!(chn.flags & 32)) {
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chn.flags |= 0x40;
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_volume = 0;
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return;
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} else
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chn.cmdBlocks = chn.cmdBlockIndices;
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}
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}
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int16 Infogrames::tune(Slide &slide, int16 start) const {
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byte *data;
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uint8 off;
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data = slide.data + slide.dataOffset;
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if (slide.flags & 1)
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slide.finetunePos += (int8) data[1];
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slide.flags &= ~1;
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start += slide.finetunePos - slide.finetuneNeg;
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if (start < 0)
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start = 0;
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if (slide.flags & 4)
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return start;
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slide.curDelay1++;
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if (slide.curDelay1 != data[2])
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return start;
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slide.curDelay2++;
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slide.curDelay1 = 0;
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if (slide.curDelay2 == data[0]) {
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slide.curDelay2 = 0;
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off = slide.dataOffset + 3;
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if (off == 12) {
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if (slide.flags == 0) {
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slide.flags |= 4;
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return start;
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} else {
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slide.curDelay2 = 0;
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slide.finetuneNeg += slide.amount;
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off = 3;
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}
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}
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slide.dataOffset = off;
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}
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slide.flags |= 1;
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return start;
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}
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void Infogrames::interrupt() {
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int chn;
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if (!_data) {
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clearVoices();
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return;
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}
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_speedCounter--;
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_sample = 0xFF;
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for (chn = 0; chn < 4; chn++) {
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_volume = 0;
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_period = 0;
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getNextSample(_chn[chn]);
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setChannelVolume(chn, _volume);
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setChannelPeriod(chn, _period);
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if ((_sample != 0xFF) && (_sample < _instruments->_count)) {
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setChannelData(chn,
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_instruments->_samples[_sample].data,
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_instruments->_samples[_sample].dataRepeat,
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_instruments->_samples[_sample].length,
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_instruments->_samples[_sample].lengthRepeat);
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_sample = 0xFF;
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}
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}
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if (_speedCounter == 0)
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_speedCounter = _speed;
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// End reached?
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if ((_chn[0].flags & 64) && (_chn[1].flags & 64) &&
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(_chn[2].flags & 64) && (_chn[3].flags & 64)) {
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if (_repCount > 0) {
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_repCount--;
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init();
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} else if (_repCount != -1) {
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stopPaula();
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} else {
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init();
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}
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}
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}
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} // End of namespace Audio
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