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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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20
src/audio.c
View File

@ -71,10 +71,10 @@ bool mixer_control_setvol(unsigned int device, int volume, int rel)
mixer = ao_plugin_get_mixer(output->plugin, output->data);
if (mixer != NULL) {
if (rel) {
int cur_volume;
if (!mixer_control(mixer, AC_MIXER_GETVOL, &cur_volume)) {
int cur_volume = mixer_get_volume(mixer);
if (cur_volume < 0)
return false;
}
volume = volume + cur_volume;
}
if (volume > 100)
@ -82,7 +82,7 @@ bool mixer_control_setvol(unsigned int device, int volume, int rel)
else if (volume < 0)
volume = 0;
return mixer_control(mixer, AC_MIXER_SETVOL, &volume);
return mixer_set_volume(mixer, volume);
}
return false;
}
@ -97,8 +97,16 @@ bool mixer_control_getvol(unsigned int device, int *volume)
output = audio_output_get(device);
mixer = ao_plugin_get_mixer(output->plugin, output->data);
if (mixer != NULL)
return mixer_control(mixer, AC_MIXER_GETVOL, volume);
if (mixer != NULL) {
int volume2;
volume2 = mixer_get_volume(mixer);
if (volume2 < 0)
return false;
*volume = volume2;
return true;
}
return false;
}

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,
};

6
src/mixer_api.c
View File

@ -50,12 +50,6 @@ bool mixer_open(struct mixer *mixer)
return mixer->plugin->open(mixer);
}
bool mixer_control(struct mixer *mixer, int cmd, void *arg)
{
assert(mixer != NULL && mixer->plugin != NULL);
return mixer->plugin->control(mixer, cmd, arg);
}
void mixer_close(struct mixer *mixer)
{
assert(mixer != NULL && mixer->plugin != NULL);

34
src/mixer_api.h
View File

@ -44,15 +44,26 @@ struct mixer_plugin {
*/
bool (*open)(struct mixer *data);
/**
* Control mixer device.
*/
bool (*control)(struct mixer *data, int cmd, void *arg);
/**
* Close mixer device
*/
void (*close)(struct mixer *data);
/**
* Reads the current volume.
*
* @return the current volume (0..100 including) or -1 on
* error
*/
int (*get_volume)(struct mixer *mixer);
/**
* Sets the volume.
*
* @param volume the new volume (0..100 including)
* @return true on success
*/
bool (*set_volume)(struct mixer *mixer, unsigned volume);
};
struct mixer {
@ -72,7 +83,18 @@ void
mixer_free(struct mixer *mixer);
bool mixer_open(struct mixer *mixer);
bool mixer_control(struct mixer *mixer, int cmd, void *arg);
void mixer_close(struct mixer *mixer);
static inline int
mixer_get_volume(struct mixer *mixer)
{
return mixer->plugin->get_volume(mixer);
}
static inline bool
mixer_set_volume(struct mixer *mixer, unsigned volume)
{
return mixer->plugin->set_volume(mixer, volume);
}
#endif

7
src/output_api.h
View File

@ -28,13 +28,6 @@
struct audio_output;
enum audio_control_command {
AC_MIXER_GETVOL = 0,
AC_MIXER_SETVOL,
};
struct audio_output;
const char *audio_output_get_name(const struct audio_output *ao);
#endif