81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/*
|
|
* Copyright (c) LSE
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY LSE AS IS AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL LSE BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#include <sound.h>
|
|
#include <stdlib.h>
|
|
|
|
struct melody *load_sound(const char *path)
|
|
{
|
|
struct melody *melody = NULL;
|
|
int fd = -1;
|
|
int nb = -1;
|
|
int i = -1;
|
|
char *magic = ".KSF";
|
|
char buf[5];
|
|
|
|
if ((fd = open(path, O_RDONLY)) < 0)
|
|
return NULL;
|
|
|
|
buf[4] = 0;
|
|
/* check the magic number */
|
|
if ((read(fd, buf, 4) != 4) || (strcmp(magic, buf) != 0)) {
|
|
close(fd);
|
|
return NULL;
|
|
}
|
|
|
|
/* read the numbers of tones */
|
|
if (read(fd, &nb, sizeof(int)) != sizeof(int)) {
|
|
close(fd);
|
|
return NULL;
|
|
}
|
|
|
|
/* allocate space to store the new melody */
|
|
if (!(melody = malloc((nb + 1) * sizeof(struct melody)))) {
|
|
close(fd);
|
|
return NULL;
|
|
}
|
|
|
|
/* load the melody */
|
|
for (i = 0; i < nb; i++) {
|
|
if (read(fd, &melody[i].freq, sizeof(int)) != sizeof(int) ||
|
|
read(fd, &melody[i].duration, sizeof(int)) != sizeof(int)) {
|
|
close(fd);
|
|
free(melody);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* put a null tones to indicate end of melody */
|
|
melody[nb].freq = 0;
|
|
melody[nb].duration = (unsigned long)-1;
|
|
|
|
close(fd);
|
|
|
|
return (melody);
|
|
}
|
|
|
|
void clear_sound(struct melody *melody)
|
|
{
|
|
free(melody);
|
|
}
|