Unify sound API configuration.

[disorder] / lib / mixer.c

diff --git a/lib/mixer.c b/lib/mixer.c
index 4fd4a9a..f674d68 100644 (file)
--- a/lib/mixer.c
+++ b/lib/mixer.c
@@ -1,6 +1,6 @@
 /*
  * This file is part of DisOrder
- * Copyright (C) 2004 Richard Kettlewell
+ * Copyright (C) 2007 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
@@ -35,81 +35,65 @@
 #include "log.h"
 #include "syscalls.h"
 
+static const struct mixer *mixers[] = {
 #if HAVE_SYS_SOUNDCARD_H
-#include <sys/soundcard.h>
-
-/* documentation does not match implementation! */
-#ifndef SOUND_MIXER_READ
-# define SOUND_MIXER_READ(x) MIXER_READ(x)
-#endif
-#ifndef SOUND_MIXER_WRITE
-# define SOUND_MIXER_WRITE(x) MIXER_WRITE(x)
+  &mixer_oss
 #endif
+};
 
-static const char *channels[] = SOUND_DEVICE_NAMES;
-
-int mixer_channel(const char *c) {
-  unsigned n;
-  
-  if(!c[strspn(c, "0123456789")])
-    return atoi(c);
-  else {
-    for(n = 0; n < sizeof channels / sizeof *channels; ++n)
-      if(!strcmp(channels[n], c))
-       return n;
-    return -1;
-  }
+#define NMIXERS (sizeof mixers / sizeof *mixers)
+
+static const struct mixer *find_mixer(int api) {
+  size_t n;
+
+  for(n = 0; n < NMIXERS; ++n)
+    if(mixers[n]->api == api)
+      return mixers[n];
+  return 0;
+}
+
+int mixer_valid_channel(int api, const char *c) {
+  const struct mixer *const m = find_mixer(api);
+
+  return m ? m->validate_channel(c) : 1;
+}
+
+int mixer_valid_device(int api, const char *d) {
+  const struct mixer *const m = find_mixer(api);
+
+  return m ? m->validate_device(d) : 1;
 }
 
 int mixer_control(int *left, int *right, int set) {
-  int fd, ch, r;
-    
-  if(config->mixer
-     && config->channel
-     && (ch = mixer_channel(config->channel)) != -1) {
-    if((fd = open(config->mixer, O_RDWR, 0)) < 0) {
-      error(errno, "error opening %s", config->mixer);
-      return -1;
-    }
-    if(set) {
-      r = (*left & 0xff) + (*right & 0xff) * 256;
-      if(ioctl(fd, SOUND_MIXER_WRITE(ch), &r) == -1) {
-       error(errno, "error changing %s channel %s",
-             config->mixer, config->channel);
-       xclose(fd);
-       return -1;
-      }
-    }
-    if(ioctl(fd, SOUND_MIXER_READ(ch), &r) == -1) {
-      error(errno, "error reading %s channel %s",
-           config->mixer, config->channel);
-      xclose(fd);
-      return -1;
+  const struct mixer *const m = find_mixer(config->api);
+
+  if(m) {
+    if(set)
+      return m->set(left, right);
+    else
+      return m->get(left, right);
+  } else {
+    static int reported;
+
+    if(!reported) {
+      error(0, "don't know how to get/set volume with this api");
+      reported = 1;
     }
-    *left = r & 0xff;
-    *right = (r >> 8) & 0xff;
-    xclose(fd);
-    return 0;
-  } else
     return -1;
+  }
 }
-#else
-int mixer_channel(const char attribute((unused)) *c) {
-  return 0;
+
+const char *mixer_default_device(int api) {
+  const struct mixer *const m = find_mixer(api);
+
+  return m ? m->device : "";
 }
 
-int mixer_control(int attribute((unused)) *left, 
-                 int attribute((unused)) *right,
-                 int attribute((unused)) set) {
-  static int reported;
+const char *mixer_default_channel(int api) {
+  const struct mixer *const m = find_mixer(api);
 
-  if(!reported) {
-    error(0, "don't know how to set volume on this platform");
-    reported = 1;
-  }
-  return -1;
+  return m ? m->channel : "";
 }
-#endif
 
 /*
 Local Variables: