1 /* WMix 3.0 -- a mixer using the OSS mixer API.
2 * Copyright (C) 2000, 2001
3 * Daniel Richard G. <skunk@mit.edu>,
4 * timecop <timecop@japan.co.jp>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 #include <sys/types.h>
33 #include "include/common.h"
34 #include "include/misc.h"
46 /* Converts separate left and right channel volumes (each in [0, 1]) to
47 * volume and balance values. (Volume is in [0, 1], balance is in [-1, 1])
49 void lr_to_vb(float left
, float right
, float *volume
, float *balance
)
51 assert((left
>= 0.0) && (right
>= 0.0));
53 *volume
= MAX(left
, right
);
56 *balance
= -1.0 + right
/ left
;
57 else if (right
> left
)
58 *balance
= 1.0 - left
/ right
;
63 /* Performs the reverse calculation of lr_to_vb()
65 void vb_to_lr(float volume
, float balance
, float *left
, float *right
)
67 /* *left = volume; *right = volume; return; // XXX */
69 *left
= volume
* (1.0 - MAX(0.0, balance
));
70 *right
= volume
* (1.0 + MIN(0.0, balance
));
73 double get_current_time(void)
78 gettimeofday(&tv
, NULL
);
80 t
= (double)tv
.tv_sec
;
81 t
+= (double)tv
.tv_usec
/ 1.0e6
;
86 void add_region(int index
, int x
, int y
, int width
, int height
)
91 mr
[index
].width
= width
;
92 mr
[index
].height
= height
;
95 int check_region(int x
, int y
)
100 for (i
= 0; i
< 16 && !found
; i
++) {
101 if (mr
[i
].enable
&& x
>= mr
[i
].x
&&
102 x
<= mr
[i
].x
+ mr
[i
].width
&&
103 y
>= mr
[i
].y
&& y
<= mr
[i
].y
+ mr
[i
].height
)
111 /* handle writing PID file, silently ignore if we can't do it */
112 void create_pid_file(void)
118 home
= getenv("HOME");
122 pid
= calloc(1, strlen(home
) + 10);
123 sprintf(pid
, "%s/.wmix.pid", home
);
124 fp
= fopen(pid
, "w");
126 fprintf(fp
, "%d\n", getpid());