/
output.c
138 lines (119 loc) · 2.99 KB
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
/*
TiMidity -- Experimental MIDI to WAVE converter
Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
output.c
Audio output (to file / device) functions.
*/
#include "config.h"
#include "output.h"
#include "tables.h"
#ifdef SDL
extern PlayMode sdl_play_mode;
#define DEFAULT_PLAY_MODE &sdl_play_mode
#endif
PlayMode *play_mode_list[] = {
#ifdef DEFAULT_PLAY_MODE
DEFAULT_PLAY_MODE,
#endif
0
};
#ifdef DEFAULT_PLAY_MODE
PlayMode *play_mode=DEFAULT_PLAY_MODE;
#endif
/*****************************************************************/
/* Some functions to convert signed 32-bit data to other formats */
void s32tos8(void *dp, int32 *lp, int32 c)
{
int8 *cp=(int8 *)(dp);
int32 l;
while (c--)
{
l=(*lp++)>>(32-8-GUARD_BITS);
if (l>127) l=127;
else if (l<-128) l=-128;
*cp++ = (int8) (l);
}
}
void s32tou8(void *dp, int32 *lp, int32 c)
{
uint8 *cp=(uint8 *)(dp);
int32 l;
while (c--)
{
l=(*lp++)>>(32-8-GUARD_BITS);
if (l>127) l=127;
else if (l<-128) l=-128;
*cp++ = 0x80 ^ ((uint8) l);
}
}
void s32tos16(void *dp, int32 *lp, int32 c)
{
int16 *sp=(int16 *)(dp);
int32 l;
while (c--)
{
l=(*lp++)>>(32-16-GUARD_BITS);
if (l > 32767) l=32767;
else if (l<-32768) l=-32768;
*sp++ = (int16)(l);
}
}
void s32tou16(void *dp, int32 *lp, int32 c)
{
uint16 *sp=(uint16 *)(dp);
int32 l;
while (c--)
{
l=(*lp++)>>(32-16-GUARD_BITS);
if (l > 32767) l=32767;
else if (l<-32768) l=-32768;
*sp++ = 0x8000 ^ (uint16)(l);
}
}
void s32tos16x(void *dp, int32 *lp, int32 c)
{
int16 *sp=(int16 *)(dp);
int32 l;
while (c--)
{
l=(*lp++)>>(32-16-GUARD_BITS);
if (l > 32767) l=32767;
else if (l<-32768) l=-32768;
*sp++ = XCHG_SHORT((int16)(l));
}
}
void s32tou16x(void *dp, int32 *lp, int32 c)
{
uint16 *sp=(uint16 *)(dp);
int32 l;
while (c--)
{
l=(*lp++)>>(32-16-GUARD_BITS);
if (l > 32767) l=32767;
else if (l<-32768) l=-32768;
*sp++ = XCHG_SHORT(0x8000 ^ (uint16)(l));
}
}
void s32toulaw(void *dp, int32 *lp, int32 c)
{
uint8 *up=(uint8 *)(dp);
int32 l;
while (c--)
{
l=(*lp++)>>(32-13-GUARD_BITS);
if (l > 4095) l=4095;
else if (l<-4096) l=-4096;
*up++ = _l2u[l];
}
}