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
|
/*
* $Id$
*
* This file is part of WorkMan, the civilized CD player library
* (c) 1991-1997 by Steven Grimm (original author)
* (c) by Dirk Försterling (current 'author' = maintainer)
* The maintainer can be contacted by his e-mail address:
* milliByte@DeathsDoor.com
*
* 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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* Vendor-specific drive control routines for Toshiba XM-3401 series.
*/
static char drv_toshiba_id[] = "$Id$";
#include <stdio.h>
#include <errno.h>
#include "include/wm_config.h"
#include "include/wm_struct.h"
#include "include/wm_scsi.h"
#define SCMD_TOSH_EJECT 0xc4
/* local prototypes */
static int tosh_init( struct wm_drive *d );
static int tosh_eject( struct wm_drive *d );
static int tosh_set_volume( struct wm_drive *d, int left, int right );
static int tosh_get_volume( struct wm_drive *d, int *left, int *right );
struct wm_drive_proto toshiba_proto = {
tosh_init, /* functions... */
gen_close,
gen_get_trackcount,
gen_get_cdlen,
gen_get_trackinfo,
gen_get_drive_status,
tosh_get_volume,
tosh_set_volume,
gen_pause,
gen_resume,
gen_stop,
gen_play,
tosh_eject,
gen_closetray,
NULL /* gen_get_cdtext */
};
/*
* Initialize the driver.
*/
static int
tosh_init( struct wm_drive *d )
{
extern int min_volume;
/* Sun use Toshiba drives as well */
#if defined(SYSV) && defined(CODEC)
codec_init();
#endif
min_volume = 0;
return ( 0 );
}
/*
* Send the Toshiba code to eject the CD.
*/
static int
tosh_eject( struct wm_drive *d )
{
return (sendscsi(d, NULL, 0, 0, SCMD_TOSH_EJECT, 1, 0,0,0,0,0,0,0,0,0,0));
}
/*
* Set the volume. The low end of the scale is more sensitive than the high
* end, so make up for that by transforming the volume parameters to a square
* curve.
*/
static int
tosh_set_volume( struct wm_drive *d, int left, int right )
{
left = (left * left * left) / 10000;
right = (right * right * right) / 10000;
return (gen_set_volume(d, left, right));
}
/*
* Undo the transformation above using a binary search (so no floating-point
* math is required.)
*/
static int
unscale_volume(cd_vol, max)
int cd_vol, max;
{
int vol = 0, top = max, bot = 0, scaled = 0;
/*cd_vol = (cd_vol * 100 + (max_volume - 1)) / max_volume;*/
while (bot <= top)
{
vol = (top + bot) / 2;
scaled = (vol * vol) / max;
if (cd_vol <= scaled)
top = vol - 1;
else
bot = vol + 1;
}
/* Might have looked down too far for repeated scaled values */
if (cd_vol < scaled)
vol++;
if (vol < 0)
vol = 0;
else if (vol > max)
vol = max;
return (vol);
}
/*
* Get the volume.
*/
static int
tosh_get_volume( struct wm_drive *d, int *left, int *right )
{
int status;
status = gen_get_volume(d, left, right);
if (status < 0)
return (status);
*left = unscale_volume(*left, 100);
*right = unscale_volume(*right, 100);
return (0);
}
|
