1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/* 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 {
private:
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(0), _module(0) { };
void init(OSystem *system);
void start();
void pause();
void stop();
void loadModule(const char *fn);
void loadModuleStream(Common::SeekableReadStream &fs);
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
|