/*
* This file is part of DisOrder
- * Copyright (C) 2004, 2007 Richard Kettlewell
+ * Copyright (C) 2004, 2007, 2008 Richard Kettlewell
*
* 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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
+/** @file lib/mixer-oss.c
+ * @brief OSS mixer support
+ *
+ * Mono output devices aren't explicitly supported (but may work
+ * nonetheless).
+ */
#include <config.h>
+
+#if HAVE_SYS_SOUNDCARD_H
+
#include "types.h"
#include <stdio.h>
#include <errno.h>
#include <stddef.h>
#include <sys/ioctl.h>
+#include <sys/soundcard.h>
#include "configuration.h"
#include "mixer.h"
#include "log.h"
#include "syscalls.h"
-
-#if HAVE_SYS_SOUNDCARD_H
-#include <sys/soundcard.h>
+#include "mem.h"
/* documentation does not match implementation! */
#ifndef SOUND_MIXER_READ
# define SOUND_MIXER_WRITE(x) MIXER_WRITE(x)
#endif
+/** @brief Channel names */
static const char *channels[] = SOUND_DEVICE_NAMES;
+/** @brief Convert channel name to number */
static int mixer_channel(const char *c) {
unsigned n;
}
}
-static int oss_validate_channel(const char *c) {
- if(mixer_channel(c) != -1)
- return 1;
- else
- return 0;
-}
-
-static int oss_validate_device(const char *d) {
- struct stat sb;
-
- if(stat(d, &sb) < 0) {
- error(errno, "%s", d);
- return 0;
- }
- if(!S_ISCHR(sb.st_mode)) {
- error(0, "%s: not a character device", d);
- return 0;
- }
- return 1;
-}
-
+/** @brief Open the OSS mixer device and return its fd */
static int oss_do_open(void) {
int fd;
- if((fd = open(config->mixer, O_RDWR, 0)) < 0)
- error(errno, "error opening %s", config->mixer);
+ if((fd = open(config->mixer, O_RDWR, 0)) < 0) {
+ static char *reported;
+
+ if(!reported || strcmp(reported, config->mixer)) {
+ if(reported)
+ xfree(reported);
+ reported = xstrdup(config->mixer);
+ error(errno, "error opening %s", config->mixer);
+ }
+ }
return fd;
}
+/** @brief Get the OSS mixer setting */
static int oss_do_get(int *left, int *right, int fd, int ch) {
int r;
return 0;
}
+/** @brief Get OSS volume */
static int oss_get(int *left, int *right) {
int ch, fd;
return -1;
}
+/** @brief Set OSS volume */
static int oss_set(int *left, int *right) {
int ch, fd, r;
return -1;
}
+/** @brief OSS mixer vtable */
const struct mixer mixer_oss = {
BACKEND_OSS,
- oss_validate_device,
- oss_validate_channel,
oss_get,
oss_set,
"/dev/mixer",