int mixer_ctl_set(struct mixer_ctl *ctl, unsigned percent)
{
struct snd_ctl_elem_value ev;
unsigned n;
memset(&ev, 0, sizeof(ev));
ev.id.numid = ctl->info->id.numid;
switch (ctl->info->type) {
case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
for (n = 0; n < ctl->info->count; n++)
ev.value.integer.value[n] = !!percent;
break;
case SNDRV_CTL_ELEM_TYPE_INTEGER: {
long value = scale_int(ctl->info, percent);
for (n = 0; n < ctl->info->count; n++)
ev.value.integer.value[n] = value;
break;
}
case SNDRV_CTL_ELEM_TYPE_INTEGER64: {
long long value = scale_int64(ctl->info, percent);
for (n = 0; n < ctl->info->count; n++)
ev.value.integer64.value[n] = value;
break;
}
default:
errno = EINVAL;
return -1;
}
return ioctl(ctl->mixer->fd, SNDRV_CTL_IOCTL_ELEM_WRITE, &ev);
}
/*
* Add support for controls taking more than one parameter as input value
* This is useful for volume controls which take two parameters as input value.
*/
int mixer_ctl_mulvalues(struct mixer_ctl *ctl, int count, char ** argv)
{
struct snd_ctl_elem_value ev;
unsigned n;
if (!ctl) {
ALOGV("can't find control\n");
return -1;
}
if (count < ctl->info->count || count > ctl->info->count)
return -EINVAL;
memset(&ev, 0, sizeof(ev));
ev.id.numid = ctl->info->id.numid;
switch (ctl->info->type) {
case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
for (n = 0; n < ctl->info->count; n++)
ev.value.integer.value[n] = !!atoi(argv[n]);
break;
case SNDRV_CTL_ELEM_TYPE_INTEGER: {
for (n = 0; n < ctl->info->count; n++) {
fprintf( stderr, "Value: %d idx:%d\n", atoi(argv[n]), n);
ev.value.integer.value[n] = atoi(argv[n]);
}
break;
}
case SNDRV_CTL_ELEM_TYPE_INTEGER64: {
for (n = 0; n < ctl->info->count; n++) {
long long value_ll = scale_int64(ctl->info, atoi(argv[n]));
fprintf( stderr, "ll_value = %lld\n", value_ll);
ev.value.integer64.value[n] = value_ll;
}
break;
}
case SNDRV_CTL_ELEM_TYPE_ENUMERATED: {
for (n = 0; n < ctl->info->count; n++) {
fprintf( stderr, "Value: %d idx:%d\n", atoi(argv[n]), n);
ev.value.enumerated.item[n] = (unsigned int)atoi(argv[n]);
}
break;
}
default:
errno = EINVAL;
return errno;
}
return ioctl(ctl->mixer->fd, SNDRV_CTL_IOCTL_ELEM_WRITE, &ev);
}
static int set_volume_simple(struct mixer_ctl *ctl,
char **ptr, long pmin, long pmax, int count)
{
long val, orig;
char *p = *ptr, *s;
struct snd_ctl_elem_value ev;
unsigned n;
if (*p == ':')
p++;
if (*p == '\0' || (!isdigit(*p) && *p != '-'))
goto skip;
s = p;
val = strtol(s, &p, 10);
if (*p == '.') {
p++;
strtol(p, &p, 10);
}
if (*p == '%') {
val = (long)percent_to_index(strtod(s, NULL), pmin, pmax);
p++;
} else if (p[0] == 'd' && p[1] == 'B') {
val = (long)(strtod(s, NULL) * 100.0);
p += 2;
} else {
if (pmin < 0) {
pmax = pmax - pmin;
pmin = 0;
}
}
val = check_range(val, pmin, pmax);
ALOGV("val = %x", val);
if (!ctl) {
ALOGV("can't find control\n");
return -EPERM;
}
if (count < ctl->info->count || count > ctl->info->count)
return -EINVAL;
ALOGV("Value = ");
memset(&ev, 0, sizeof(ev));
ev.id.numid = ctl->info->id.numid;
switch (ctl->info->type) {
case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
for (n = 0; n < ctl->info->count; n++)
ev.value.integer.value[n] = !!val;
print_dB(val);
break;
case SNDRV_CTL_ELEM_TYPE_INTEGER: {
for (n = 0; n < ctl->info->count; n++)
ev.value.integer.value[n] = val;
print_dB(val);
break;
}
case SNDRV_CTL_ELEM_TYPE_INTEGER64: {
for (n = 0; n < ctl->info->count; n++) {
long long value_ll = scale_int64(ctl->info, val);
print_dB(value_ll);
ev.value.integer64.value[n] = value_ll;
}
break;
}
default:
errno = EINVAL;
return errno;
}
ALOGV("\n");
return ioctl(ctl->mixer->fd, SNDRV_CTL_IOCTL_ELEM_WRITE, &ev);
skip:
if (*p == ',')
p++;
*ptr = p;
return 0;
}
int mixer_ctl_set(struct mixer_ctl *ctl, unsigned percent)
{
struct snd_ctl_elem_value ev;
unsigned n;
long min, max;
unsigned int *tlv = NULL;
enum ctl_type type;
int volume = 0;
unsigned int tlv_type;
if (!ctl) {
ALOGV("can't find control\n");
return -1;
}
if (is_volume(ctl->info->id.name, &type)) {
ALOGV("capability: volume\n");
tlv = calloc(1, DEFAULT_TLV_SIZE);
if (tlv == NULL) {
ALOGE("failed to allocate memory\n");
} else if (!mixer_ctl_read_tlv(ctl, tlv, &min, &max, &tlv_type)) {
switch(tlv_type) {
case SNDRV_CTL_TLVT_DB_LINEAR:
case SNDRV_CTL_TLVT_DB_MINMAX:
ALOGV("tlv db linear/db minmax: b4 %d\n", percent);
if (min < 0) {
max = max - min;
min = 0;
}
percent = check_range(percent, min, max);
ALOGV("tlv db linear: %d %d %d\n", percent, min, max);
volume = 1;
break;
default:
percent = (long)percent_to_index(percent, min, max);
percent = check_range(percent, min, max);
volume = 1;
break;
}
} else
ALOGV("mixer_ctl_read_tlv failed\n");
free(tlv);
}
memset(&ev, 0, sizeof(ev));
ev.id.numid = ctl->info->id.numid;
switch (ctl->info->type) {
case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
for (n = 0; n < ctl->info->count; n++)
ev.value.integer.value[n] = !!percent;
break;
case SNDRV_CTL_ELEM_TYPE_INTEGER: {
int value;
if (!volume)
value = scale_int(ctl->info, percent);
else
value = (int) percent;
for (n = 0; n < ctl->info->count; n++)
ev.value.integer.value[n] = value;
break;
}
case SNDRV_CTL_ELEM_TYPE_INTEGER64: {
long long value;
if (!volume)
value = scale_int64(ctl->info, percent);
else
value = (long long)percent;
for (n = 0; n < ctl->info->count; n++)
ev.value.integer64.value[n] = value;
break;
}
case SNDRV_CTL_ELEM_TYPE_IEC958: {
struct snd_aes_iec958 *iec958;
iec958 = (struct snd_aes_iec958 *)percent;
memcpy(ev.value.iec958.status,iec958->status,SPDIF_CHANNEL_STATUS_SIZE);
break;
}
case SNDRV_CTL_ELEM_TYPE_ENUMERATED: {
for (n = 0; n < ctl->info->count; n++) {
ev.value.enumerated.item[n] = (unsigned int)percent;
}
break;
}
default:
errno = EINVAL;
return errno;
}
return ioctl(ctl->mixer->fd, SNDRV_CTL_IOCTL_ELEM_WRITE, &ev);
}