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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Stepan Moskovchenko
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#define FRACTSIZE 12
#include "lib/pluginlib_exit.h"
#define BUF_SIZE 16384 /* 64 kB output buffers */
#define NBUF 2
#ifndef SIMULATOR
#if (HW_SAMPR_CAPS & SAMPR_CAP_22) /* use 22050Hz if we can */
#define SAMPLE_RATE SAMPR_22 /* 22050 */
#else
#define SAMPLE_RATE SAMPR_44 /* 44100 */
#endif
/* Some of the pp based targets can't handle too many voices
mainly because they have to use 44100Hz sample rate, this could be
improved to increase MAX_VOICES for targets that can do 22kHz */
#ifdef CPU_PP
#define MAX_VOICES 16
#else
#define MAX_VOICES 24 /* Note: 24 midi channels is the minimum general midi spec implementation */
#endif /* CPU_PP */
#else /* Simulator requires 44100Hz, and we can afford to use more voices */
#define SAMPLE_RATE SAMPR_44
#define MAX_VOICES 48
#endif
#define BYTE unsigned char
/* Data chunk ID types, returned by readID() */
#define ID_UNKNOWN -1
#define ID_MTHD 1
#define ID_MTRK 2
#define ID_EOF 3
#define ID_RIFF 4
/* MIDI Commands */
#define MIDI_NOTE_OFF 128
#define MIDI_NOTE_ON 144
#define MIDI_AFTERTOUCH 160
#define MIDI_CONTROL 176
#define MIDI_PRGM 192
#define MIDI_PITCHW 224
/* MIDI Controllers */
#define CTRL_DATAENT_MSB 6
#define CTRL_VOLUME 7
#define CTRL_BALANCE 8
#define CTRL_PANNING 10
#define CTRL_NONREG_LSB 98
#define CTRL_NONREG_MSB 99
#define CTRL_REG_LSB 100
#define CTRL_REG_MSB 101
#define REG_PITCHBEND_MSB 0
#define REG_PITCHBEND_LSB 0
#define CHANNEL 1
/* Most of these are deprecated.. rampdown is used, maybe one other one too */
#define STATE_ATTACK 1
#define STATE_DECAY 2
#define STATE_SUSTAIN 3
#define STATE_RELEASE 4
#define STATE_RAMPDOWN 5
/* Loop states */
#define STATE_LOOPING 7
#define STATE_NONLOOPING 8
/* Various bits in the GUS mode byte */
#define LOOP_ENABLED 4
#define LOOP_PINGPONG 8
#define LOOP_REVERSE 16
struct MIDIfile
{
int Length;
unsigned short numTracks;
unsigned short div; /* Time division, X ticks per millisecond */
struct Track * tracks[48];
unsigned char patches[128];
int numPatches;
};
struct SynthObject
{
struct GWaveform * wf;
int delta;
int decay;
unsigned int cp; /* unsigned int */
int state, loopState;
int note, vol, ch;
int curRate, curOffset, targetOffset;
int curPoint;
signed short int volscale;
bool isUsed;
};
struct Event
{
unsigned int delta;
unsigned char status, d1, d2;
unsigned int len;
unsigned char * evData;
};
struct Track
{
unsigned int size;
unsigned int numEvents;
unsigned int delta; /* For sequencing */
unsigned int pos; /* For sequencing */
void * dataBlock;
};
int printf(const char *fmt, ...);
unsigned char readChar(int file);
int readTwoBytes(int file);
int readFourBytes(int file);
int readVarData(int file);
int eof(int fd);
unsigned char * readData(int file, int len);
#define malloc(n) my_malloc(n)
void * my_malloc(int size);
extern struct SynthObject voices[MAX_VOICES];
extern int chVol[16]; /* Channel volume */
extern int chPan[16]; /* Channel panning */
extern int chPat[16]; /* Channel patch */
extern int chPW[16]; /* Channel pitch wheel, MSB only */
extern int chPBDepth[16]; /* Channel pitch bend depth (Controller 6 */
extern int chPBNoteOffset[16] IBSS_ATTR; /* Pre-computed whole semitone offset */
extern int chPBFractBend[16] IBSS_ATTR; /* Fractional bend applied to delta */
extern unsigned char chLastCtrlMSB[16]; /* MIDI regs, used for Controller 6. */
extern unsigned char chLastCtrlLSB[16]; /* The non-registered ones are ignored */
extern struct GPatch * gusload(char *);
extern struct GPatch * patchSet[128];
extern struct GPatch * drumSet[128];
extern struct MIDIfile * mf;
extern int number_of_samples;
extern int playing_time IBSS_ATTR;
extern int samples_this_second IBSS_ATTR;
extern long bpm;
|
