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mixer_api: replaced method "control()" with "{get,set}_volume()"

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The method control() is too complicated, and overengineered.  Replace
it with two trivial functions: get_volume() and set_volume().
This commit is contained in:
Max Kellermann
2009-02-16 01:39:52 +01:00
parent 37bc31d161
commit 83ce0e5325
6 changed files with 159 additions and 150 deletions
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140
src/mixer/alsa_mixer.c
View File

@@ -146,85 +146,87 @@ alsa_mixer_open(struct mixer *data)
return false;
}
static bool
alsa_mixer_control(struct mixer *data, int cmd, void *arg)
static int
alsa_mixer_get_volume(struct mixer *mixer)
{
struct alsa_mixer *am = (struct alsa_mixer *)data;
switch (cmd) {
case AC_MIXER_GETVOL:
{
int err;
int ret, *volume = arg;
long level;
struct alsa_mixer *am = (struct alsa_mixer *)mixer;
int err;
int ret;
long level;
if (!am->handle && !alsa_mixer_open(data)) {
return false;
}
if ((err = snd_mixer_handle_events(am->handle)) < 0) {
g_warning("problems getting alsa volume: %s (snd_mixer_%s)\n",
snd_strerror(err), "handle_events");
alsa_mixer_close(data);
return false;
}
if ((err = snd_mixer_selem_get_playback_volume(am->elem,
SND_MIXER_SCHN_FRONT_LEFT, &level)) < 0) {
g_warning("problems getting alsa volume: %s (snd_mixer_%s)\n",
snd_strerror(err), "selem_get_playback_volume");
alsa_mixer_close(data);
return false;
}
ret = ((am->volume_set / 100.0) * (am->volume_max - am->volume_min)
+ am->volume_min) + 0.5;
if (am->volume_set > 0 && ret == level) {
ret = am->volume_set;
} else {
ret = (int)(100 * (((float)(level - am->volume_min)) /
(am->volume_max - am->volume_min)) + 0.5);
}
*volume = ret;
return true;
if (am->handle == NULL && !alsa_mixer_open(mixer))
return -1;
err = snd_mixer_handle_events(am->handle);
if (err < 0) {
g_warning("problems getting alsa volume: %s (snd_mixer_%s)\n",
snd_strerror(err), "handle_events");
alsa_mixer_close(mixer);
return false;
}
case AC_MIXER_SETVOL:
{
float vol;
long level;
int *volume = arg;
int err;
if (!am->handle && !alsa_mixer_open(data)) {
return false;
}
vol = *volume;
am->volume_set = vol + 0.5;
am->volume_set = am->volume_set > 100 ? 100 :
(am->volume_set < 0 ? 0 : am->volume_set);
level = (long)(((vol / 100.0) * (am->volume_max - am->volume_min) +
am->volume_min) + 0.5);
level = level > am->volume_max ? am->volume_max : level;
level = level < am->volume_min ? am->volume_min : level;
if ((err = snd_mixer_selem_set_playback_volume_all(am->elem,
level)) < 0) {
g_warning("problems setting alsa volume: %s\n",
snd_strerror(err));
alsa_mixer_close(data);
return false;
}
return true;
err = snd_mixer_selem_get_playback_volume(am->elem,
SND_MIXER_SCHN_FRONT_LEFT,
&level);
if (err < 0) {
g_warning("problems getting alsa volume: %s (snd_mixer_%s)\n",
snd_strerror(err), "selem_get_playback_volume");
alsa_mixer_close(mixer);
return false;
}
default:
g_warning("Unsuported alsa control\n");
break;
ret = ((am->volume_set / 100.0) * (am->volume_max - am->volume_min)
+ am->volume_min) + 0.5;
if (am->volume_set > 0 && ret == level) {
ret = am->volume_set;
} else {
ret = (int)(100 * (((float)(level - am->volume_min)) /
(am->volume_max - am->volume_min)) + 0.5);
}
return false;
return ret;
}
static bool
alsa_mixer_set_volume(struct mixer *mixer, unsigned volume)
{
struct alsa_mixer *am = (struct alsa_mixer *)mixer;
float vol;
long level;
int err;
if (am->handle == NULL && !alsa_mixer_open(mixer))
return false;
vol = volume;
am->volume_set = vol + 0.5;
am->volume_set = am->volume_set > 100
? 100 :
(am->volume_set < 0
? 0 : am->volume_set);
level = (long)(((vol / 100.0) * (am->volume_max - am->volume_min) +
am->volume_min) + 0.5);
level = level > am->volume_max ? am->volume_max : level;
level = level < am->volume_min ? am->volume_min : level;
err = snd_mixer_selem_set_playback_volume_all(am->elem, level);
if (err < 0) {
g_warning("problems setting alsa volume: %s\n",
snd_strerror(err));
alsa_mixer_close(mixer);
return false;
}
return true;
}
const struct mixer_plugin alsa_mixer = {
.init = alsa_mixer_init,
.finish = alsa_mixer_finish,
.open = alsa_mixer_open,
.control = alsa_mixer_control,
.close = alsa_mixer_close
.close = alsa_mixer_close,
.get_volume = alsa_mixer_get_volume,
.set_volume = alsa_mixer_set_volume,
};

102
src/mixer/oss_mixer.c
View File

@@ -137,74 +137,64 @@ oss_mixer_open(struct mixer *data)
return true;
}
static bool
oss_mixer_control(struct mixer *data, int cmd, void *arg)
static int
oss_mixer_get_volume(struct mixer *mixer)
{
struct oss_mixer *om = (struct oss_mixer *) data;
switch (cmd) {
case AC_MIXER_GETVOL:
{
int left, right, level;
int *ret;
struct oss_mixer *om = (struct oss_mixer *)mixer;
int left, right, level;
int ret;
if (om->device_fd < 0 && !oss_mixer_open(data)) {
return false;
}
if (om->device_fd < 0 && !oss_mixer_open(mixer))
return false;
if (ioctl(om->device_fd, MIXER_READ(om->volume_control), &level) < 0) {
oss_mixer_close(data);
g_warning("unable to read oss volume\n");
return false;
}
left = level & 0xff;
right = (level & 0xff00) >> 8;
if (left != right) {
g_warning("volume for left and right is not the same, \"%i\" and "
"\"%i\"\n", left, right);
}
ret = (int *) arg;
*ret = left;
return true;
ret = ioctl(om->device_fd, MIXER_READ(om->volume_control), &level);
if (ret < 0) {
oss_mixer_close(mixer);
g_warning("unable to read oss volume\n");
return false;
}
case AC_MIXER_SETVOL:
{
int new;
int level;
int *value = arg;
if (om->device_fd < 0 && !oss_mixer_open(data)) {
return false;
}
left = level & 0xff;
right = (level & 0xff00) >> 8;
new = *value;
if (new < 0) {
new = 0;
} else if (new > 100) {
new = 100;
}
level = (new << 8) + new;
if (ioctl(om->device_fd, MIXER_WRITE(om->volume_control), &level) < 0) {
g_warning("unable to set oss volume\n");
oss_mixer_close(data);
return false;
}
return true;
if (left != right) {
g_warning("volume for left and right is not the same, \"%i\" and "
"\"%i\"\n", left, right);
}
default:
g_warning("Unsuported oss control\n");
break;
return left;
}
static bool
oss_mixer_set_volume(struct mixer *mixer, unsigned volume)
{
struct oss_mixer *om = (struct oss_mixer *)mixer;
int level;
int ret;
if (om->device_fd < 0 && !oss_mixer_open(mixer))
return false;
if (volume > 100)
volume = 100;
level = (volume << 8) + volume;
ret = ioctl(om->device_fd, MIXER_WRITE(om->volume_control), &level);
if (ret < 0) {
g_warning("unable to set oss volume\n");
oss_mixer_close(mixer);
return false;
}
return false;
return true;
}
const struct mixer_plugin oss_mixer = {
.init = oss_mixer_init,
.finish = oss_mixer_finish,
.open = oss_mixer_open,
.control = oss_mixer_control,
.close = oss_mixer_close
.close = oss_mixer_close,
.get_volume = oss_mixer_get_volume,
.set_volume = oss_mixer_set_volume,
};