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-rw-r--r--sound/mods/infogrames.cpp458
1 files changed, 458 insertions, 0 deletions
diff --git a/sound/mods/infogrames.cpp b/sound/mods/infogrames.cpp
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+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2007 The ScummVM project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "sound/mods/infogrames.h"
+#include "common/endian.h"
+
+namespace Audio {
+
+Infogrames::Instruments::Instruments() {
+ init();
+}
+
+Infogrames::Instruments::~Instruments() {
+ if (_sampleData)
+ delete[] _sampleData;
+}
+
+void Infogrames::Instruments::init() {
+ int i;
+
+ for (i = 0; i < 32; i++) {
+ _samples[i].data = 0;
+ _samples[i].dataRepeat = 0;
+ _samples[i].length = 0;
+ _samples[i].lengthRepeat = 0;
+ }
+ _count = 0;
+ _sampleData = 0;
+}
+
+bool Infogrames::Instruments::load(Common::SeekableReadStream &ins) {
+ int i;
+ uint32 fsize;
+ uint32 offset[32];
+ uint32 offsetRepeat[32];
+ uint32 dataOffset;
+
+ unload();
+
+ fsize = ins.readUint32BE();
+ dataOffset = fsize;
+ for (i = 0; (i < 32) && !ins.eos(); i++) {
+ offset[i] = ins.readUint32BE();
+ offsetRepeat[i] = ins.readUint32BE();
+ if ((offset[i] > fsize) || (offsetRepeat[i] > fsize) ||
+ (offset[i] < (ins.pos() + 4)) ||
+ (offsetRepeat[i] < (ins.pos() + 4))) {
+ // Definitely no real entry anymore
+ ins.seek(-8, SEEK_CUR);
+ break;
+ }
+
+ dataOffset = MIN(dataOffset, MIN(offset[i], offsetRepeat[i]));
+ ins.skip(4); // Unknown
+ _samples[i].length = ins.readUint16BE() * 2;
+ _samples[i].lengthRepeat = ins.readUint16BE() * 2;
+ }
+
+ if (dataOffset >= fsize)
+ return false;
+
+ _count = i;
+ _sampleData = new int8[fsize - dataOffset];
+ ins.seek(dataOffset + 4);
+ ins.read(_sampleData, fsize - dataOffset);
+
+ for (i--; i >= 0; i--) {
+ _samples[i].data = _sampleData + (offset[i] - dataOffset);
+ _samples[i].dataRepeat = _sampleData + (offsetRepeat[i] - dataOffset);
+ }
+
+ return true;
+}
+
+void Infogrames::Instruments::unload(void) {
+ if (_sampleData)
+ delete[] _sampleData;
+ init();
+}
+
+const uint8 Infogrames::tickCount[] =
+ {2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96};
+const uint16 Infogrames::periods[] =
+ {0x6ACC, 0x64CC, 0x5F25, 0x59CE, 0x54C3, 0x5003, 0x4B86, 0x4747, 0x4346,
+ 0x3F8B, 0x3BF3, 0x3892, 0x3568, 0x3269, 0x2F93, 0x2CEA, 0x2A66, 0x2801,
+ 0x2566, 0x23A5, 0x21AF, 0x1FC4, 0x1DFE, 0x1C4E, 0x1ABC, 0x1936, 0x17CC,
+ 0x1676, 0x1533, 0x1401, 0x12E4, 0x11D5, 0x10D4, 0x0FE3, 0x0EFE, 0x0E26,
+ 0x0D5B, 0x0C9B, 0x0BE5, 0x0B3B, 0x0A9B, 0x0A02, 0x0972, 0x08E9, 0x0869,
+ 0x07F1, 0x077F, 0x0713, 0x06AD, 0x064D, 0x05F2, 0x059D, 0x054D, 0x0500,
+ 0x04B8, 0x0475, 0x0435, 0x03F8, 0x03BF, 0x038A, 0x0356, 0x0326, 0x02F9,
+ 0x02CF, 0x02A6, 0x0280, 0x025C, 0x023A, 0x021A, 0x01FC, 0x01E0, 0x01C5,
+ 0x01AB, 0x0193, 0x017D, 0x0167, 0x0153, 0x0140, 0x012E, 0x011D, 0x010D,
+ 0x00FE, 0x00F0, 0x00E2, 0x00D6, 0x00CA, 0x00BE, 0x00B4, 0x00AA, 0x00A0,
+ 0x0097, 0x008F, 0x0087, 0x007F, 0x0078, 0x0070, 0x0060, 0x0050, 0x0040,
+ 0x0030, 0x0020, 0x0010, 0x0000, 0x0000, 0x0020, 0x2020, 0x2020, 0x2020,
+ 0x2020, 0x3030, 0x3030, 0x3020, 0x2020, 0x2020, 0x2020, 0x2020, 0x2020,
+ 0x2020, 0x2020, 0x2020, 0x2090, 0x4040, 0x4040, 0x4040, 0x4040, 0x4040,
+ 0x4040, 0x4040, 0x400C, 0x0C0C, 0x0C0C, 0x0C0C, 0x0C0C, 0x0C40, 0x4040,
+ 0x4040, 0x4040, 0x0909, 0x0909, 0x0909, 0x0101, 0x0101, 0x0101, 0x0101,
+ 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x4040, 0x4040, 0x4040,
+ 0x0A0A, 0x0A0A, 0x0A0A, 0x0202, 0x0202, 0x0202, 0x0202, 0x0202, 0x0202,
+ 0x0202, 0x0202, 0x0202, 0x0202, 0x4040, 0x4040, 0x2000};
+
+Infogrames::Infogrames(Instruments &ins, bool stereo, int rate) :
+ Paula(stereo, rate, rate/80) {
+ _instruments = &ins;
+ _data = 0;
+ _repCount = -1;
+
+ reset();
+}
+
+Infogrames::~Infogrames() {
+ if (_data)
+ delete[] _data;
+}
+
+void Infogrames::init() {
+ int i;
+
+ _volume = 0;
+ _period = 0;
+ _sample = 0;
+ _speedCounter = _speed;
+
+ for (i = 0; i < 4; i++) {
+ _chn[i].cmds = 0;
+ _chn[i].cmdBlocks = 0;
+ _chn[i].volSlide.finetuneNeg = 0;
+ _chn[i].volSlide.finetunePos = 0;
+ _chn[i].volSlide.data = 0;
+ _chn[i].volSlide.amount = 0;
+ _chn[i].volSlide.dataOffset = 0;
+ _chn[i].volSlide.flags = 0;
+ _chn[i].volSlide.curDelay1 = 0;
+ _chn[i].volSlide.curDelay2 = 0;
+ _chn[i].periodSlide.finetuneNeg = 0;
+ _chn[i].periodSlide.finetunePos = 0;
+ _chn[i].periodSlide.data = 0;
+ _chn[i].periodSlide.amount = 0;
+ _chn[i].periodSlide.dataOffset = 0;
+ _chn[i].periodSlide.flags = 0;
+ _chn[i].periodSlide.curDelay1 = 0;
+ _chn[i].periodSlide.curDelay2 = 0;
+ _chn[i].period = 0;
+ _chn[i].flags = 0x81;
+ _chn[i].ticks = 0;
+ _chn[i].tickCount = 0;
+ _chn[i].periodMod = 0;
+ }
+
+ _end = _data == 0;
+}
+
+void Infogrames::reset() {
+ int i;
+
+ stopPlay();
+ init();
+
+ _volSlideBlocks = 0;
+ _periodSlideBlocks = 0;
+ _subSong = 0;
+ _cmdBlocks = 0;
+ _speedCounter = 0;
+ _speed = 0;
+
+ for (i = 0; i < 4; i++)
+ _chn[i].cmdBlockIndices = 0;
+}
+
+bool Infogrames::load(Common::SeekableReadStream &dum) {
+ int subSong = 0;
+ int i;
+ uint32 size;
+
+ size = dum.size();
+ if (size < 20)
+ return false;
+
+ _data = new uint8[size];
+ dum.seek(0);
+ dum.read(_data, size);
+
+ Common::MemoryReadStream dataStr(_data, size);
+
+ dataStr.seek(subSong * 2);
+ dataStr.seek(dataStr.readUint16BE());
+ _subSong = _data + dataStr.pos();
+ if (_subSong > (_data + size))
+ return false;
+
+ _speedCounter = dataStr.readUint16BE();
+ _speed = _speedCounter;
+ _volSlideBlocks = _subSong + dataStr.readUint16BE();
+ _periodSlideBlocks = _subSong + dataStr.readUint16BE();
+ for (i = 0; i < 4; i++) {
+ _chn[i].cmdBlockIndices = _subSong + dataStr.readUint16BE();
+ _chn[i].flags = 0x81;
+ }
+ _cmdBlocks = _data + dataStr.pos() + 2;
+
+ if ((_volSlideBlocks > (_data + size)) ||
+ (_periodSlideBlocks > (_data + size)) ||
+ (_chn[0].cmdBlockIndices > (_data + size)) ||
+ (_chn[1].cmdBlockIndices > (_data + size)) ||
+ (_chn[2].cmdBlockIndices > (_data + size)) ||
+ (_chn[3].cmdBlockIndices > (_data + size)) ||
+ (_cmdBlocks > (_data + size)))
+ return false;
+
+ _end = false;
+ _playing = true;
+ return true;
+}
+
+void Infogrames::unload(void) {
+ stopPlay();
+
+ if (_data)
+ delete[] _data;
+ _data = 0;
+
+ clearVoices();
+ reset();
+
+ _end = true;
+}
+
+void Infogrames::getNextSample(Channel &chn) {
+ byte *data;
+ byte cmdBlock;
+ uint16 cmd;
+ bool cont = false;
+
+ if (chn.flags & 64)
+ return;
+
+ if (chn.flags & 1) {
+ chn.flags &= ~1;
+ chn.cmdBlocks = chn.cmdBlockIndices;
+ } else {
+ chn.flags &= ~1;
+ if (_speedCounter == 0)
+ chn.ticks--;
+ if (chn.ticks != 0) {
+ _volume = MAX((int16) 0, tune(chn.volSlide, 0));
+ _period = tune(chn.periodSlide, chn.period);
+ return;
+ } else {
+ chn.ticks = chn.tickCount;
+ cont = true;
+ }
+ }
+
+ while (1) {
+ while (cont || ((cmdBlock = *chn.cmdBlocks) != 0xFF)) {
+ if (!cont) {
+ chn.cmdBlocks++;
+ chn.cmds = _subSong +
+ READ_BE_UINT16(_cmdBlocks + (cmdBlock * 2));
+ } else
+ cont = false;
+ while ((cmd = *chn.cmds) != 0xFF) {
+ chn.cmds++;
+ if (cmd & 128)
+ {
+ switch (cmd & 0xE0) {
+ case 0x80: // 100xxxxx - Set ticks
+ chn.ticks = tickCount[cmd & 0xF];
+ chn.tickCount = tickCount[cmd & 0xF];
+ break;
+ case 0xA0: // 101xxxxx - Set sample
+ _sample = cmd & 0x1F;
+ break;
+ case 0xC0: // 110xxxxx - Set volume slide/finetune
+ data = _volSlideBlocks + (cmd & 0x1F) * 13;
+ chn.volSlide.flags = (*data & 0x80) | 1;
+ chn.volSlide.amount = *data++ & 0x7F;
+ chn.volSlide.data = data;
+ chn.volSlide.dataOffset = 0;
+ chn.volSlide.finetunePos = 0;
+ chn.volSlide.finetuneNeg = 0;
+ chn.volSlide.curDelay1 = 0;
+ chn.volSlide.curDelay2 = 0;
+ break;
+ case 0xE0: // 111xxxxx - Extended
+ switch(cmd & 0x1F) {
+ case 0: // Set period modifier
+ chn.periodMod = (int8) *chn.cmds++;
+ break;
+ case 1: // Set continuous period slide
+ chn.periodSlide.data =
+ _periodSlideBlocks + *chn.cmds++ * 13 + 1;
+ chn.periodSlide.amount = 0;
+ chn.periodSlide.dataOffset = 0;
+ chn.periodSlide.finetunePos = 0;
+ chn.periodSlide.finetuneNeg = 0;
+ chn.periodSlide.curDelay1 = 0;
+ chn.periodSlide.curDelay2 = 0;
+ chn.periodSlide.flags = 0x81;
+ break;
+ case 2: // Set non-continuous period slide
+ chn.periodSlide.data =
+ _periodSlideBlocks + *chn.cmds++ * 13 + 1;
+ chn.periodSlide.amount = 0;
+ chn.periodSlide.dataOffset = 0;
+ chn.periodSlide.finetunePos = 0;
+ chn.periodSlide.finetuneNeg = 0;
+ chn.periodSlide.curDelay1 = 0;
+ chn.periodSlide.curDelay2 = 0;
+ chn.periodSlide.flags = 1;
+ break;
+ case 3: // NOP
+ break;
+ default:
+ warning("Unknown Infogrames command: %X", cmd);
+ }
+ break;
+ }
+ } else { // 0xxxxxxx - Set period
+ if (cmd != 0)
+ cmd += chn.periodMod;
+ chn.period = periods[cmd];
+ chn.volSlide.dataOffset = 0;
+ chn.volSlide.finetunePos = 0;
+ chn.volSlide.finetuneNeg = 0;
+ chn.volSlide.curDelay1 = 0;
+ chn.volSlide.curDelay2 = 0;
+ chn.volSlide.flags |= 1;
+ chn.volSlide.flags &= ~4;
+ chn.periodSlide.dataOffset = 0;
+ chn.periodSlide.finetunePos = 0;
+ chn.periodSlide.finetuneNeg = 0;
+ chn.periodSlide.curDelay1 = 0;
+ chn.periodSlide.curDelay2 = 0;
+ chn.periodSlide.flags |= 1;
+ chn.periodSlide.flags &= ~4;
+ _volume = MAX((int16) 0, tune(chn.volSlide, 0));
+ _period = tune(chn.periodSlide, chn.period);
+ return;
+ }
+ }
+ }
+ if (!(chn.flags & 32)) {
+ chn.flags |= 0x40;
+ _volume = 0;
+ return;
+ } else
+ chn.cmdBlocks = chn.cmdBlockIndices;
+ }
+}
+
+int16 Infogrames::tune(Slide &slide, int16 start) const {
+ byte *data;
+ uint8 off;
+
+ data = slide.data + slide.dataOffset;
+
+ if (slide.flags & 1)
+ slide.finetunePos += (int8) data[1];
+ slide.flags &= ~1;
+
+ start += slide.finetunePos - slide.finetuneNeg;
+ if (start < 0)
+ start = 0;
+
+ if (slide.flags & 4)
+ return start;
+
+ slide.curDelay1++;
+ if (slide.curDelay1 != data[2])
+ return start;
+ slide.curDelay2++;
+ slide.curDelay1 = 0;
+ if (slide.curDelay2 == data[0]) {
+ slide.curDelay2 = 0;
+ off = slide.dataOffset + 3;
+ if (off == 12) {
+ if (slide.flags == 0) {
+ slide.flags |= 4;
+ return start;
+ } else {
+ slide.curDelay2 = 0;
+ slide.finetuneNeg += slide.amount;
+ off = 3;
+ }
+ }
+ slide.dataOffset = off;
+ }
+ slide.flags |= 1;
+ return start;
+}
+
+void Infogrames::interrupt() {
+ int chn;
+
+ if (!_data) {
+ clearVoices();
+ return;
+ }
+
+ _speedCounter--;
+ _sample = 0xFF;
+ for (chn = 0; chn < 4; chn++) {
+ _volume = 0;
+ _period = 0;
+ getNextSample(_chn[chn]);
+ _voice[chn].volume = _volume;
+ _voice[chn].period = _period;
+ if ((_sample != 0xFF) && (_sample < _instruments->_count)) {
+ _voice[chn].data = _instruments->_samples[_sample].data;
+ _voice[chn].length = _instruments->_samples[_sample].length;
+ _voice[chn].dataRepeat = _instruments->_samples[_sample].dataRepeat;
+ _voice[chn].lengthRepeat =
+ _instruments->_samples[_sample].lengthRepeat;
+ _voice[chn].offset = 0;
+ _sample = 0xFF;
+ }
+ }
+ if (_speedCounter == 0)
+ _speedCounter = _speed;
+
+ // End reached?
+ if ((_chn[0].flags & 64) && (_chn[1].flags & 64) &&
+ (_chn[2].flags & 64) && (_chn[3].flags & 64)) {
+ if (_repCount > 0) {
+ _repCount--;
+ init();
+ } else if (_repCount != -1) {
+ _end = true;
+ _playing = false;
+ }
+ else
+ init();
+ }
+}
+
+} // End of namespace Audio
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