bool CALSAHControlMonitor::Add(const std::string& ctlHandleName,
snd_ctl_elem_iface_t interface,
unsigned int device,
const std::string& name)
{
snd_hctl_t *hctl = GetHandle(ctlHandleName);
if (!hctl)
{
return false;
}
snd_ctl_elem_id_t *id;
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_id_set_interface(id, interface);
snd_ctl_elem_id_set_name (id, name.c_str());
snd_ctl_elem_id_set_device (id, device);
snd_hctl_elem_t *elem = snd_hctl_find_elem(hctl, id);
if (!elem)
{
PutHandle(ctlHandleName);
return false;
}
snd_hctl_elem_set_callback(elem, HCTLCallback);
return true;
}
static snd_hctl_elem_t *
_phoneui_utils_sound_init_get_control_by_name(const char *ctl_name)
{
snd_ctl_elem_id_t *id;
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
snd_ctl_elem_id_set_name(id, ctl_name);
return snd_hctl_find_elem(hctl, id);
}
bool CAESinkALSA::GetELD(snd_hctl_t *hctl, int device, CAEDeviceInfo& info, bool& badHDMI)
{
badHDMI = false;
snd_ctl_elem_id_t *id;
snd_ctl_elem_info_t *einfo;
snd_ctl_elem_value_t *control;
snd_hctl_elem_t *elem;
snd_ctl_elem_id_alloca(&id);
memset(id, 0, snd_ctl_elem_id_sizeof());
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_PCM);
snd_ctl_elem_id_set_name (id, "ELD" );
snd_ctl_elem_id_set_device (id, device);
elem = snd_hctl_find_elem(hctl, id);
if (!elem)
return false;
snd_ctl_elem_info_alloca(&einfo);
memset(einfo, 0, snd_ctl_elem_info_sizeof());
if (snd_hctl_elem_info(elem, einfo) < 0)
return false;
if (!snd_ctl_elem_info_is_readable(einfo))
return false;
if (snd_ctl_elem_info_get_type(einfo) != SND_CTL_ELEM_TYPE_BYTES)
return false;
snd_ctl_elem_value_alloca(&control);
memset(control, 0, snd_ctl_elem_value_sizeof());
if (snd_hctl_elem_read(elem, control) < 0)
return false;
int dataLength = snd_ctl_elem_info_get_count(einfo);
/* if there is no ELD data, then its a bad HDMI device, either nothing attached OR an invalid nVidia HDMI device
* OR the driver doesn't properly support ELD (notably ATI/AMD, 2012-05) */
if (!dataLength)
badHDMI = true;
else
CAEELDParser::Parse(
(const uint8_t*)snd_ctl_elem_value_get_bytes(control),
dataLength,
info
);
info.m_deviceType = AE_DEVTYPE_HDMI;
return true;
}
int V4LRadioControl::volume() const
{
const QString ctlName("Line DAC Playback Volume");
const QString card("hw:0");
int volume = 0;
int err;
static snd_ctl_t *handle = NULL;
snd_ctl_elem_info_t *info;
snd_ctl_elem_id_t *id;
snd_ctl_elem_value_t *control;
snd_ctl_elem_info_alloca(&info);
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_value_alloca(&control);
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); /* MIXER */
snd_ctl_elem_id_set_name(id, ctlName.toAscii());
if ((err = snd_ctl_open(&handle, card.toAscii(), 0)) < 0) {
return 0;
}
snd_ctl_elem_info_set_id(info, id);
if ((err = snd_ctl_elem_info(handle, info)) < 0) {
snd_ctl_close(handle);
handle = NULL;
return 0;
}
snd_ctl_elem_info_get_id(info, id); /* FIXME: Remove it when hctl find works ok !!! */
snd_ctl_elem_value_set_id(control, id);
snd_ctl_close(handle);
handle = NULL;
snd_hctl_t *hctl;
snd_hctl_elem_t *elem;
if ((err = snd_hctl_open(&hctl, card.toAscii(), 0)) < 0) {
return 0;
}
if ((err = snd_hctl_load(hctl)) < 0) {
return 0;
}
elem = snd_hctl_find_elem(hctl, id);
if (elem)
volume = vol(elem);
snd_hctl_close(hctl);
return (volume/118.0) * 100;
}
static int snd_hctl_handle_event(snd_hctl_t *hctl, snd_ctl_event_t *event)
{
snd_hctl_elem_t *elem;
int res;
assert(hctl);
assert(hctl->ctl);
switch (event->type) {
case SND_CTL_EVENT_ELEM:
break;
default:
return 0;
}
if (event->data.elem.mask == SNDRV_CTL_EVENT_MASK_REMOVE) {
int dir;
res = _snd_hctl_find_elem(hctl, &event->data.elem.id, &dir);
assert(res >= 0 && dir == 0);
if (res < 0 || dir != 0)
return -ENOENT;
snd_hctl_elem_remove(hctl, (unsigned int) res);
return 0;
}
if (event->data.elem.mask & SNDRV_CTL_EVENT_MASK_ADD) {
elem = calloc(1, sizeof(snd_hctl_elem_t));
if (elem == NULL)
return -ENOMEM;
elem->id = event->data.elem.id;
elem->hctl = hctl;
res = snd_hctl_elem_add(hctl, elem);
if (res < 0)
return res;
}
if (event->data.elem.mask & (SNDRV_CTL_EVENT_MASK_VALUE |
SNDRV_CTL_EVENT_MASK_INFO)) {
elem = snd_hctl_find_elem(hctl, &event->data.elem.id);
assert(elem);
if (!elem)
return -ENOENT;
res = snd_hctl_elem_throw_event(elem, event->data.elem.mask &
(SNDRV_CTL_EVENT_MASK_VALUE |
SNDRV_CTL_EVENT_MASK_INFO));
if (res < 0)
return res;
}
return 0;
}
static int setamixer(int devnum,char *param, int v1, int v2)
{
int type;
char str[100];
snd_hctl_t *hctl;
snd_ctl_elem_id_t *id;
snd_ctl_elem_value_t *control;
snd_hctl_elem_t *elem;
snd_ctl_elem_info_t *info;
sprintf(str,"hw:%d",devnum);
if (snd_hctl_open(&hctl, str, 0)) return(-1);
snd_hctl_load(hctl);
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
snd_ctl_elem_id_set_name(id, param);
elem = snd_hctl_find_elem(hctl, id);
if (!elem)
{
snd_hctl_close(hctl);
return(-1);
}
snd_ctl_elem_info_alloca(&info);
snd_hctl_elem_info(elem,info);
type = snd_ctl_elem_info_get_type(info);
snd_ctl_elem_value_alloca(&control);
snd_ctl_elem_value_set_id(control, id);
switch(type)
{
case SND_CTL_ELEM_TYPE_INTEGER:
snd_ctl_elem_value_set_integer(control, 0, v1);
if (v2 > 0) snd_ctl_elem_value_set_integer(control, 1, v2);
break;
case SND_CTL_ELEM_TYPE_BOOLEAN:
snd_ctl_elem_value_set_integer(control, 0, (v1 != 0));
break;
}
if (snd_hctl_elem_write(elem, control))
{
snd_hctl_close(hctl);
return(-1);
}
snd_hctl_close(hctl);
return(0);
}
/******************************************************************************
* setMixerInput
*****************************************************************************/
static Int setMixerControl (const Char *name, Int value)
{
Int status;
snd_hctl_t *hctl;
snd_ctl_elem_id_t *id;
snd_hctl_elem_t *elem;
snd_ctl_elem_value_t *control;
if ((status = snd_hctl_open(&hctl, AUDIO_MIXER, 0)) < 0) {
Dmai_err2("setMixerControl %s open error: %s\n", AUDIO_MIXER, snd_strerror(status));
return Dmai_EFAIL;;
}
if ((status = snd_hctl_load(hctl)) < 0) {
Dmai_err2("setMixerControl %s load error: %s\n", AUDIO_MIXER, snd_strerror(status));
return Dmai_EFAIL;;
}
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
snd_ctl_elem_id_set_name(id, name);
elem = snd_hctl_find_elem(hctl, id);
if (!elem) {
Dmai_err1("setMixerControl %s find element error\n",
AUDIO_MIXER);
snd_hctl_close(hctl);
return Dmai_EFAIL;
}
snd_ctl_elem_value_alloca(&control);
snd_ctl_elem_value_set_id(control, id);
snd_ctl_elem_value_set_integer(control, 0, value);
snd_hctl_elem_write(elem, control);
snd_hctl_close(hctl);
return Dmai_EOK;
}
static int amixer_max(int devnum,char *param)
{
int rv,type;
char str[100];
snd_hctl_t *hctl;
snd_ctl_elem_id_t *id;
snd_hctl_elem_t *elem;
snd_ctl_elem_info_t *info;
sprintf(str,"hw:%d",devnum);
if (snd_hctl_open(&hctl, str, 0)) return(-1);
snd_hctl_load(hctl);
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
snd_ctl_elem_id_set_name(id, param);
elem = snd_hctl_find_elem(hctl, id);
if (!elem)
{
snd_hctl_close(hctl);
return(-1);
}
snd_ctl_elem_info_alloca(&info);
snd_hctl_elem_info(elem,info);
type = snd_ctl_elem_info_get_type(info);
rv = 0;
switch(type)
{
case SND_CTL_ELEM_TYPE_INTEGER:
rv = snd_ctl_elem_info_get_max(info);
break;
case SND_CTL_ELEM_TYPE_BOOLEAN:
rv = 1;
break;
}
snd_hctl_close(hctl);
return(rv);
}
int main(int argc, char *argv[])
{
char *format = FORMAT;
char *device = DEVICE;
char *volume_control = VOLUME_CONTROL;
char *mute_control = MUTE_CONTROL;
int interval = INTERVAL;
bool snoop = false;
int opt;
while ((opt = getopt(argc, argv, "hsf:i:d:v:m:")) != -1) {
switch (opt) {
case 'h':
printf("volume [-h|-s|-f FORMAT|-i INTERVAL|-d DEVICE|-v VOLUME_CONTROL|-m MUTE_CONTROL]\n");
exit(EXIT_SUCCESS);
break;
case 's':
snoop = true;
break;
case 'f':
format = optarg;
break;
case 'd':
device = optarg;
break;
case 'i':
interval = atoi(optarg);
break;
case 'v':
volume_control = optarg;
break;
case 'm':
mute_control = optarg;
break;
}
}
int exit_code;
snd_hctl_t *hctl;
snd_ctl_elem_id_t *volume_id;
snd_ctl_elem_id_t *mute_id;
snd_ctl_elem_value_t *volume_ctl;
snd_ctl_elem_value_t *mute_ctl;
snd_ctl_elem_info_t *volume_info;
snd_hctl_elem_t *volume_elem;
snd_hctl_elem_t *mute_elem;
int vol_max, vol_min;
if (snd_hctl_open(&hctl, device, 0) || snd_hctl_load(hctl)) {
return EXIT_FAILURE;
}
snd_ctl_elem_id_malloc(&volume_id);
snd_ctl_elem_id_malloc(&mute_id);
snd_ctl_elem_value_malloc(&volume_ctl);
snd_ctl_elem_value_malloc(&mute_ctl);
snd_ctl_elem_info_malloc(&volume_info);
snd_ctl_elem_id_set_interface(volume_id, SND_CTL_ELEM_IFACE_MIXER);
snd_ctl_elem_id_set_interface(mute_id, SND_CTL_ELEM_IFACE_MIXER);
snd_ctl_elem_id_set_name(volume_id, volume_control);
snd_ctl_elem_id_set_name(mute_id, mute_control);
snd_ctl_elem_value_set_id(volume_ctl, volume_id);
snd_ctl_elem_value_set_id(mute_ctl, mute_id);
volume_elem = snd_hctl_find_elem(hctl, volume_id);
mute_elem = snd_hctl_find_elem(hctl, mute_id);
snd_ctl_elem_info_set_id(volume_info, volume_id);
snd_hctl_elem_info(volume_elem, volume_info);
vol_min = (int)snd_ctl_elem_info_get_min(volume_info);
vol_max = (int)snd_ctl_elem_info_get_max(volume_info);
if (volume_elem == NULL || mute_elem == NULL) {
snd_hctl_close(hctl);
return EXIT_FAILURE;
}
struct sigaction action = {.sa_handler = &sig_handler};
sigaction(SIGUSR1, &action, NULL);
if (snoop)
for (;;) {
if (update) {
update = false;
continue;
}
if ((exit_code = put_infos(vol_min, vol_max, volume_elem, mute_elem,
volume_ctl, mute_ctl, format)) == EXIT_FAILURE)
break;
sleep(interval);
}
else
exit_code = put_infos(vol_min, vol_max, volume_elem, mute_elem,
volume_ctl, mute_ctl, format);
snd_hctl_close(hctl);
snd_ctl_elem_id_free(volume_id);
snd_ctl_elem_id_free(mute_id);
snd_ctl_elem_value_free(volume_ctl);
snd_ctl_elem_value_free(mute_ctl);
snd_ctl_elem_info_free(volume_info);
return exit_code;
}
static int amixer_control(t_amixer *x, int argc, t_atom *argv, int roflag)
{
int err;
snd_ctl_t *handle;
snd_ctl_elem_info_t *info;
snd_ctl_elem_id_t *id;
snd_ctl_elem_value_t *control;
char *ptr;
unsigned int idx, count;
long tmp;
snd_ctl_elem_type_t type;
snd_ctl_elem_info_alloca(&info);
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_value_alloca(&control);
if (argc < 1) {
error("Specify a full control identifier: [[iface=<iface>,][name='name',][index=<index>,][device=<device>,][subdevice=<subdevice>]]|[numid=<numid>]\n");
return -EINVAL;
}
if(A_FLOAT==argv->a_type){
snd_ctl_elem_id_set_numid(id, atom_getint(argv));
if(0)
{
error("Wrong control identifier: %d\n", atom_getint(argv));
return -EINVAL;
}
} else {
if (parse_control_id(atom_getsymbol(argv)->s_name, id)) {
error("Wrong control identifier: %s\n", atom_getsymbol(argv)->s_name);
return -EINVAL;
}
}
if ((err = snd_ctl_open(&handle, x->card, 0)) < 0) {
error("Control %s open error: %s\n", x->card, snd_strerror(err));
return err;
}
snd_ctl_elem_info_set_id(info, id);
if ((err = snd_ctl_elem_info(handle, info)) < 0) {
error("Control %s cinfo error: %s\n", x->card, snd_strerror(err));
return err;
}
snd_ctl_elem_info_get_id(info, id); /* FIXME: Remove it when hctl find works ok !!! */
type = snd_ctl_elem_info_get_type(info);
count = snd_ctl_elem_info_get_count(info);
snd_ctl_elem_value_set_id(control, id);
if (!roflag) {
t_float atom_float = atom_getfloat(argv+1);
int atom_isfloat = (A_FLOAT==(argv+1)->a_type);
post("now setting");
ptr = atom_getsymbol(argv+1)->s_name;
for (idx = 0; idx < count && idx < 128 && ptr && *ptr; idx++) {
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
tmp = 0;
if(atom_isfloat){
tmp=(atom_float>0)?1:0;
} else if (!strncasecmp(ptr, "on", 2) || !strncasecmp(ptr, "up", 2)) {
tmp = 1;
ptr += 2;
} else if (!strncasecmp(ptr, "yes", 3)) {
tmp = 1;
ptr += 3;
} else if (!strncasecmp(ptr, "toggle", 6)) {
tmp = snd_ctl_elem_value_get_boolean(control, idx);
tmp = tmp > 0 ? 0 : 1;
ptr += 6;
} else if (isdigit(*ptr)) {
tmp = atoi(ptr) > 0 ? 1 : 0;
while (isdigit(*ptr))
ptr++;
} else {
while (*ptr && *ptr != ',')
ptr++;
}
snd_ctl_elem_value_set_boolean(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
tmp = atom_isfloat?((int)atom_float):get_integer(&ptr,
snd_ctl_elem_info_get_min(info),
snd_ctl_elem_info_get_max(info));
snd_ctl_elem_value_set_integer(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
tmp = atom_isfloat?((int)atom_float):get_integer64(&ptr,
snd_ctl_elem_info_get_min64(info),
snd_ctl_elem_info_get_max64(info));
snd_ctl_elem_value_set_integer64(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
tmp = atom_isfloat?((int)atom_float):get_integer(&ptr, 0, snd_ctl_elem_info_get_items(info) - 1);
snd_ctl_elem_value_set_enumerated(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_BYTES:
tmp = atom_isfloat?((int)atom_float):get_integer(&ptr, 0, 255);
snd_ctl_elem_value_set_byte(control, idx, tmp);
break;
default:
break;
}
if (!strchr(atom_getsymbol(argv+1)->s_name, ','))
ptr = atom_getsymbol(argv+1)->s_name;
else if (*ptr == ',')
ptr++;
}
if ((err = snd_ctl_elem_write(handle, control)) < 0) {
error("Control %s element write error: %s\n", x->card, snd_strerror(err));
return err;
}
}
snd_ctl_close(handle);
if (1) {
snd_hctl_t *hctl;
snd_hctl_elem_t *elem;
if ((err = snd_hctl_open(&hctl, x->card, 0)) < 0) {
error("Control %s open error: %s\n", x->card, snd_strerror(err));
return err;
}
if ((err = snd_hctl_load(hctl)) < 0) {
error("Control %s load error: %s\n", x->card, snd_strerror(err));
return err;
}
elem = snd_hctl_find_elem(hctl, id);
if (elem)
show_control(x->card, " ", elem, LEVEL_BASIC | LEVEL_ID);
else
printf("Could not find the specified element\n");
snd_hctl_close(hctl);
}
}
static int cset(int argc, char *argv[], int roflag, int keep_handle)
{
int err;
static snd_ctl_t *handle = NULL;
snd_ctl_elem_info_t *info;
snd_ctl_elem_id_t *id;
snd_ctl_elem_value_t *control;
char *ptr;
unsigned int idx, count;
long tmp;
snd_ctl_elem_type_t type;
snd_ctl_elem_info_alloca(&info);
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_value_alloca(&control);
if (argc < 1)
return -EINVAL;
if (parse_control_id(argv[0], id))
return -EINVAL;
if (handle == NULL && (err = snd_ctl_open(&handle, card, 0)) < 0)
return err;
snd_ctl_elem_info_set_id(info, id);
if ((err = snd_ctl_elem_info(handle, info)) < 0)
{
if (!keep_handle)
{
snd_ctl_close(handle);
handle = NULL;
}
return err;
}
snd_ctl_elem_info_get_id(info, id);
type = snd_ctl_elem_info_get_type(info);
count = snd_ctl_elem_info_get_count(info);
snd_ctl_elem_value_set_id(control, id);
if (!roflag)
{
ptr = argv[1];
for (idx = 0; idx < count && idx < 128 && ptr && *ptr; idx++)
{
switch (type)
{
case SND_CTL_ELEM_TYPE_BOOLEAN:
tmp = 0;
if (!strncasecmp(ptr, "on", 2) || !strncasecmp(ptr, "up", 2))
{
tmp = 1;
ptr += 2;
}
else if (!strncasecmp(ptr, "yes", 3))
{
tmp = 1;
ptr += 3;
}
else if (!strncasecmp(ptr, "toggle", 6))
{
tmp = snd_ctl_elem_value_get_boolean(control, idx);
tmp = tmp > 0 ? 0 : 1;
ptr += 6;
}
else if (isdigit(*ptr))
{
tmp = atoi(ptr) > 0 ? 1 : 0;
while (isdigit(*ptr))
ptr++;
}
else
{
while (*ptr && *ptr != ',')
ptr++;
}
snd_ctl_elem_value_set_boolean(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
tmp = get_integer(&ptr,
snd_ctl_elem_info_get_min(info),
snd_ctl_elem_info_get_max(info));
snd_ctl_elem_value_set_integer(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
tmp = get_integer64(&ptr,
snd_ctl_elem_info_get_min64(info),
snd_ctl_elem_info_get_max64(info));
snd_ctl_elem_value_set_integer64(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
tmp = get_ctl_enum_item_index(handle, info, &ptr);
if (tmp < 0)
tmp = get_integer(&ptr, 0, snd_ctl_elem_info_get_items(info) - 1);
snd_ctl_elem_value_set_enumerated(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_BYTES:
tmp = get_integer(&ptr, 0, 255);
snd_ctl_elem_value_set_byte(control, idx, tmp);
break;
default:
break;
}
if (!strchr(argv[1], ','))
ptr = argv[1];
else if (*ptr == ',')
ptr++;
}
if ((err = snd_ctl_elem_write(handle, control)) < 0)
{
if (!keep_handle)
{
snd_ctl_close(handle);
handle = NULL;
}
return err;
}
}
if (! keep_handle)
{
snd_ctl_close(handle);
handle = NULL;
}
if (!quiet)
{
snd_hctl_t *hctl;
snd_hctl_elem_t *elem;
if ((err = snd_hctl_open(&hctl, card, 0)) < 0)
return err;
if ((err = snd_hctl_load(hctl)) < 0)
return err;
elem = snd_hctl_find_elem(hctl, id);
if (elem)
show_control(" ", elem, LEVEL_BASIC | LEVEL_ID);
snd_hctl_close(hctl);
}
return 0;
}
/**
* alsa dumy codec controls interface
*/
int dummy_alsa_control_raw(char * id_string , long vol, int rw, long * value){
int err;
snd_hctl_t *hctl;
snd_ctl_elem_id_t *id;
snd_hctl_elem_t *elem;
snd_ctl_elem_value_t *control;
snd_ctl_elem_info_t *info;
snd_ctl_elem_type_t type;
unsigned int idx = 0, count;
long tmp, min, max;
char dev[10] = {0};
int card = alsa_get_aml_card();
int port = alsa_get_spdif_port();
adec_print("card = %d, port = %d\n", card, port);
sprintf(dev, "hw:%d,%d", (card >= 0) ? card : 0, (port >= 0) ? port : 0);
if ((err = snd_hctl_open(&hctl, dev, 0)) < 0) {
printf("Control %s open error: %s\n", dev, snd_strerror(err));
return err;
}
if (err = snd_hctl_load(hctl)< 0) {
printf("Control %s open error: %s\n", dev, snd_strerror(err));
return err;
}
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
snd_ctl_elem_id_set_name(id, id_string);
elem = snd_hctl_find_elem(hctl, id);
snd_ctl_elem_value_alloca(&control);
snd_ctl_elem_value_set_id(control, id);
snd_ctl_elem_info_alloca(&info);
if ((err = snd_hctl_elem_info(elem, info)) < 0) {
printf("Control %s snd_hctl_elem_info error: %s\n", dev, snd_strerror(err));
return err;
}
count = snd_ctl_elem_info_get_count(info);
type = snd_ctl_elem_info_get_type(info);
for (idx = 0; idx < count; idx++) {
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
if(rw){
tmp = 0;
if (vol >= 1) {
tmp = 1;
}
snd_ctl_elem_value_set_boolean(control, idx, tmp);
err = snd_hctl_elem_write(elem, control);
}else
*value = snd_ctl_elem_value_get_boolean(control, idx);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
if(rw){
min = snd_ctl_elem_info_get_min(info);
max = snd_ctl_elem_info_get_max(info);
if ((vol >= min) && (vol <= max))
tmp = vol;
else if (vol < min)
tmp = min;
else if (vol > max)
tmp = max;
snd_ctl_elem_value_set_integer(control, idx, tmp);
err = snd_hctl_elem_write(elem, control);
}else
*value = snd_ctl_elem_value_get_integer(control, idx);
break;
default:
printf("?");
break;
}
if (err < 0){
printf ("control%s access error=%s,close control device\n", dev, snd_strerror(err));
snd_hctl_close(hctl);
return err;
}
}
return 0;
}
/**************************************************************************
* ALSA_CheckSetVolume [internal]
*
* Helper function for Alsa volume queries. This tries to simplify
* the process of managing the volume. All parameters are optional
* (pass NULL to ignore or not use).
* Return values are MMSYSERR_NOERROR on success, or !0 on failure;
* error codes are normalized into the possible documented return
* values from waveOutGetVolume.
*/
int ALSA_CheckSetVolume(snd_hctl_t *hctl, int *out_left, int *out_right,
int *out_min, int *out_max, int *out_step,
int *new_left, int *new_right)
{
int rc = MMSYSERR_NOERROR;
int value_count = 0;
snd_hctl_elem_t * elem = NULL;
snd_ctl_elem_info_t * eleminfop = NULL;
snd_ctl_elem_value_t * elemvaluep = NULL;
snd_ctl_elem_id_t * elemidp = NULL;
const char *names[] = {"PCM Playback Volume", "Line Playback Volume", NULL};
const char **name;
#define EXIT_ON_ERROR(f,txt,exitcode) do \
{ \
int err; \
if ( (err = (f) ) < 0) \
{ \
ERR(txt " failed: %s\n", snd_strerror(err)); \
rc = exitcode; \
goto out; \
} \
} while(0)
if (! hctl)
return MMSYSERR_NOTSUPPORTED;
/* Allocate areas to return information about the volume */
EXIT_ON_ERROR(snd_ctl_elem_id_malloc(&elemidp), "snd_ctl_elem_id_malloc", MMSYSERR_NOMEM);
EXIT_ON_ERROR(snd_ctl_elem_value_malloc (&elemvaluep), "snd_ctl_elem_value_malloc", MMSYSERR_NOMEM);
EXIT_ON_ERROR(snd_ctl_elem_info_malloc (&eleminfop), "snd_ctl_elem_info_malloc", MMSYSERR_NOMEM);
snd_ctl_elem_id_clear(elemidp);
snd_ctl_elem_value_clear(elemvaluep);
snd_ctl_elem_info_clear(eleminfop);
/* Setup and find an element id that exactly matches the characteristic we want
** FIXME: It is probably short sighted to hard code and fixate on PCM Playback Volume */
for( name = names; *name; name++ )
{
snd_ctl_elem_id_set_name(elemidp, *name);
snd_ctl_elem_id_set_interface(elemidp, SND_CTL_ELEM_IFACE_MIXER);
elem = snd_hctl_find_elem(hctl, elemidp);
if (elem)
{
/* Read and return volume information */
EXIT_ON_ERROR(snd_hctl_elem_info(elem, eleminfop), "snd_hctl_elem_info", MMSYSERR_NOTSUPPORTED);
value_count = snd_ctl_elem_info_get_count(eleminfop);
if (out_min || out_max || out_step)
{
if (!snd_ctl_elem_info_is_readable(eleminfop))
{
ERR("snd_ctl_elem_info_is_readable returned false; cannot return info\n");
rc = MMSYSERR_NOTSUPPORTED;
goto out;
}
if (out_min)
*out_min = snd_ctl_elem_info_get_min(eleminfop);
if (out_max)
*out_max = snd_ctl_elem_info_get_max(eleminfop);
if (out_step)
*out_step = snd_ctl_elem_info_get_step(eleminfop);
}
if (out_left || out_right)
{
EXIT_ON_ERROR(snd_hctl_elem_read(elem, elemvaluep), "snd_hctl_elem_read", MMSYSERR_NOTSUPPORTED);
if (out_left)
*out_left = snd_ctl_elem_value_get_integer(elemvaluep, 0);
if (out_right)
{
if (value_count == 1)
*out_right = snd_ctl_elem_value_get_integer(elemvaluep, 0);
else if (value_count == 2)
*out_right = snd_ctl_elem_value_get_integer(elemvaluep, 1);
else
{
ERR("Unexpected value count %d from snd_ctl_elem_info_get_count while getting volume info\n", value_count);
rc = -1;
goto out;
}
}
}
/* Set the volume */
if (new_left || new_right)
{
EXIT_ON_ERROR(snd_hctl_elem_read(elem, elemvaluep), "snd_hctl_elem_read", MMSYSERR_NOTSUPPORTED);
if (new_left)
snd_ctl_elem_value_set_integer(elemvaluep, 0, *new_left);
if (new_right)
{
if (value_count == 1)
snd_ctl_elem_value_set_integer(elemvaluep, 0, *new_right);
else if (value_count == 2)
snd_ctl_elem_value_set_integer(elemvaluep, 1, *new_right);
else
{
ERR("Unexpected value count %d from snd_ctl_elem_info_get_count while setting volume info\n", value_count);
rc = -1;
goto out;
}
}
EXIT_ON_ERROR(snd_hctl_elem_write(elem, elemvaluep), "snd_hctl_elem_write", MMSYSERR_NOTSUPPORTED);
}
break;
}
}
if( !*name )
{
ERR("Could not find '{PCM,Line} Playback Volume' element\n");
rc = MMSYSERR_NOTSUPPORTED;
}
#undef EXIT_ON_ERROR
out:
if (elemvaluep)
snd_ctl_elem_value_free(elemvaluep);
if (eleminfop)
snd_ctl_elem_info_free(eleminfop);
if (elemidp)
snd_ctl_elem_id_free(elemidp);
return rc;
}
