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157 lines
2.9 KiB
C++
157 lines
2.9 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2006 The ScummVM project
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* Based on code by madmoose
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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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#ifndef SOUND_MODS_PROTRACKER_H
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#define SOUND_MODS_PROTRACKER_H
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#include "common/stdafx.h"
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#include "common/system.h"
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#include "sound/mods/module.h"
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namespace Modules {
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class SoundBuffer {
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private:
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int _capacity;
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int _size;
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int16 *_data;
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public:
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SoundBuffer() {
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_size = 0;
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_capacity = 8192;
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_data = (int16 *)malloc(_capacity * sizeof(int16));
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assert(_data);
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}
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~SoundBuffer() {
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free(_data);
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}
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int size() {
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return _size;
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}
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int16 *getEnd() {
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return _data + _size;
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}
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void ensureCapacity(int len) {
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if (_size + len > _capacity) {
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do {
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_capacity *= 2;
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} while (_size + len > _capacity);
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_data = (int16 *)realloc(_data, _capacity * sizeof(int16));
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assert(_data);
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memset(_data + _size, 0, len);
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}
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}
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void finish(int len) {
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_size += len;
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}
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void pop(int16 *dest, int len) {
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assert(_size >= len);
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memcpy(dest, _data, len * sizeof(int16));
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memmove(_data, _data + len, (_size - len) * sizeof(int16));
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_size -= len;
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}
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};
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class ProtrackerPlayer {
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private:
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OSystem *_system;
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Module *_module;
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SoundBuffer *_buf;
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double _generatedSamplesOverflow;
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int _tick;
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int _row;
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int _pos;
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int _patternDelay;
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int _speed;
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int _bpm;
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// For effect 0xB - Jump To Pattern;
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bool _hasJumpToPattern;
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int _jumpToPattern;
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// For effect 0xD - PatternBreak;
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bool _hasPatternBreak;
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int _skiprow;
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// For effect 0xE6 - Pattern Loop
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bool _hasPatternLoop;
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int _patternLoopCount;
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int _patternLoopRow;
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struct {
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byte sample;
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uint16 period;
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double offset;
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byte vol;
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// For effect 0x3 - Porta to note
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uint16 portaToNote;
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byte portaToNoteSpeed;
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// For effect 0x4 - Vibrato
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int vibrato;
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byte vibratoPos;
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byte vibratoSpeed;
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byte vibratoDepth;
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} _track[4];
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public:
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ProtrackerPlayer() : _system(0), _module(0) { };
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void init(OSystem *system);
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void start();
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void pause();
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void stop();
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void loadModule(const char *fn);
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void mix(byte *buf, int len);
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private:
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void generateSound();
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void updateRow();
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void updateEffects();
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static void audioCallback(void *param, byte *buf, int len);
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};
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} // End of namespace Modules
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#endif
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