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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2006 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.
*
* $Header$
*
*/
#ifndef PLAYER_NES_H
#define PLAYER_NES_H
#include "common/scummsys.h"
#include "scumm/music.h"
#include "sound/audiostream.h"
namespace Audio {
class Mixer;
}
namespace Scumm {
class ScummEngine;
static const int MAXVOLUME = 0x7F;
static const int NUMSLOTS = 3;
static const int NUMCHANS = 4;
/**
* Scumm NES sound/music driver.
*/
class Player_NES : public AudioStream, public MusicEngine {
public:
Player_NES(ScummEngine *scumm);
virtual ~Player_NES();
virtual void setMusicVolume(int vol);
virtual void startSound(int sound);
virtual void stopSound(int sound);
virtual void stopAllSounds();
virtual int getSoundStatus(int sound) const;
// AudioStream API
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return false; }
bool endOfData() const { return false; }
int getRate() const { return _sample_rate; }
private:
void sound_play();
void playSFX(int nr);
void playMusic();
byte fetchSoundByte(int nr);
void chainCommand(int chan);
void checkSilenceChannels(int chan);
void APU_writeChannel(int chan, int offset, byte value);
void APU_writeControl(byte value);
byte APU_readStatus();
void do_mix(int16 *buf, uint len);
ScummEngine *_vm;
Audio::Mixer *_mixer;
int _sample_rate;
int _samples_per_frame;
int _current_sample;
int _maxvol;
struct slot {
int framesleft;
int id;
int type;
byte *data;
int offset;
} _slot[NUMSLOTS];
struct mchan {
int command;
int framedelay;
int pitch;
int volume;
int voldelta;
int envflags;
int cmdlock;
} _mchan[NUMCHANS];
bool isSFXplaying, wasSFXplaying;
byte *dataStart;
int numNotes;
byte *auxData1;
byte *auxData2;
byte *soundptr;
};
} // End of namespace Scumm
#endif
|
