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
|
/*
Audio File Library
Copyright (C) 1999-2000, Michael Pruett <michael@68k.org>
Copyright (C) 2000-2001, Silicon Graphics, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307 USA.
*/
/*
pcm.c
This file declares default PCM mappings.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "afinternal.h"
#include "pcm.h"
#include "util.h"
_PCMInfo _af_default_signed_integer_pcm_mappings[] =
{
{0, 0, 0, 0},
{SLOPE_INT8, 0, MIN_INT8, MAX_INT8},
{SLOPE_INT16, 0, MIN_INT16, MAX_INT16},
{SLOPE_INT24, 0, MIN_INT24, MAX_INT24},
{SLOPE_INT32, 0, MIN_INT32, MAX_INT32}
};
_PCMInfo _af_default_unsigned_integer_pcm_mappings[] =
{
{0, 0, 0, 0},
{SLOPE_INT8, INTERCEPT_U_INT8, 0, MAX_U_INT8},
{SLOPE_INT16, INTERCEPT_U_INT16, 0, MAX_U_INT16},
{SLOPE_INT24, INTERCEPT_U_INT24, 0, MAX_U_INT24},
{SLOPE_INT32, INTERCEPT_U_INT32, 0, MAX_U_INT32}
};
_PCMInfo _af_default_float_pcm_mapping =
{1, 0, 0, 0};
_PCMInfo _af_default_double_pcm_mapping =
{1, 0, 0, 0};
/*
Initialize the PCM mapping for a given track.
*/
void afInitPCMMapping (AFfilesetup setup, int trackid,
double slope, double intercept, double minClip, double maxClip)
{
_TrackSetup *track;
if (!_af_filesetup_ok(setup))
return;
if ((track = _af_filesetup_get_tracksetup(setup, trackid)) == NULL)
return;
track->f.pcm.slope = slope;
track->f.pcm.intercept = intercept;
track->f.pcm.minClip = minClip;
track->f.pcm.maxClip = maxClip;
}
int afSetVirtualPCMMapping (AFfilehandle file, int trackid,
double slope, double intercept, double minClip, double maxClip)
{
_Track *track;
if (!_af_filehandle_ok(file))
return -1;
if ((track = _af_filehandle_get_track(file, trackid)) == NULL)
return -1;
track->v.pcm.slope = slope;
track->v.pcm.intercept = intercept;
track->v.pcm.minClip = minClip;
track->v.pcm.maxClip = maxClip;
track->ms.modulesdirty = AF_TRUE;
return 0;
}
int afSetTrackPCMMapping (AFfilehandle file, int trackid,
double slope, double intercept, double minClip, double maxClip)
{
_Track *track;
if (!_af_filehandle_ok(file))
return -1;
if ((track = _af_filehandle_get_track(file, trackid)) == NULL)
return -1;
/*
NOTE: this is highly unusual: we don't ordinarily
change track.f after the file is opened.
PCM mapping is the exception because this information
is not encoded in sound files' headers using today's
formats, so the user will probably want to set this
information on a regular basis. The defaults may or
may not be what the user wants.
*/
track->f.pcm.slope = slope;
track->f.pcm.intercept = intercept;
track->f.pcm.minClip = minClip;
track->f.pcm.maxClip = maxClip;
track->ms.modulesdirty = AF_TRUE;
return 0;
}
void afGetPCMMapping (AFfilehandle file, int trackid,
double *slope, double *intercept, double *minClip, double *maxClip)
{
_Track *track;
if (!_af_filehandle_ok(file))
return;
if ((track = _af_filehandle_get_track(file, trackid)) == NULL)
return;
if (slope)
*slope = track->f.pcm.slope;
if (intercept)
*intercept = track->f.pcm.intercept;
if (minClip)
*minClip = track->f.pcm.minClip;
if (maxClip)
*maxClip = track->f.pcm.maxClip;
}
void afGetVirtualPCMMapping (AFfilehandle file, int trackid,
double *slope, double *intercept, double *minClip, double *maxClip)
{
_Track *track;
if (!_af_filehandle_ok(file))
return;
if ((track = _af_filehandle_get_track(file, trackid)) == NULL)
return;
if (slope)
*slope = track->v.pcm.slope;
if (intercept)
*intercept = track->v.pcm.intercept;
if (minClip)
*minClip = track->v.pcm.minClip;
if (maxClip)
*maxClip = track->v.pcm.maxClip;
}
|
