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