static snd_mixer_elem_t *
gst_alsa_mixer_find_master_mixer (GstAlsaMixer * mixer, snd_mixer_t * handle)
{
snd_mixer_elem_t *element;
gint i, count;
count = snd_mixer_get_count (handle);
/* Check if we have a playback mixer labelled as 'Master' */
element = snd_mixer_first_elem (handle);
for (i = 0; i < count; i++) {
if (snd_mixer_selem_has_playback_volume (element) &&
strcmp (snd_mixer_selem_get_name (element), "Master") == 0) {
return element;
}
element = snd_mixer_elem_next (element);
}
/* If not, check if we have a playback mixer labelled as 'Front' */
element = snd_mixer_first_elem (handle);
for (i = 0; i < count; i++) {
if (snd_mixer_selem_has_playback_volume (element) &&
strcmp (snd_mixer_selem_get_name (element), "Front") == 0) {
return element;
}
element = snd_mixer_elem_next (element);
}
/* If not, check if we have a playback mixer labelled as 'PCM' */
element = snd_mixer_first_elem (handle);
for (i = 0; i < count; i++) {
if (snd_mixer_selem_has_playback_volume (element) &&
strcmp (snd_mixer_selem_get_name (element), "PCM") == 0) {
return element;
}
element = snd_mixer_elem_next (element);
}
/* If not, check if we have a playback mixer with both volume and switch */
element = snd_mixer_first_elem (handle);
for (i = 0; i < count; i++) {
if (snd_mixer_selem_has_playback_volume (element) &&
snd_mixer_selem_has_playback_switch (element)) {
return element;
}
element = snd_mixer_elem_next (element);
}
/* If not, take any playback mixer with a volume control */
element = snd_mixer_first_elem (handle);
for (i = 0; i < count; i++) {
if (snd_mixer_selem_has_playback_volume (element)) {
return element;
}
element = snd_mixer_elem_next (element);
}
/* Looks like we're out of luck ... */
return NULL;
}
static void set_volume(AudioCapture *capture, int level) {
snd_mixer_t *mixer=NULL;
int err;
err=snd_mixer_open(&mixer,0);
if(err < 0) {
fprintf(stderr, "Could not open alsa mixer: %s\r\n",snd_strerror(err));
exit(1);
}
char hw_id[100];
snprintf(hw_id, sizeof(hw_id), "hw:%d", capture->pcm_id);
if ((err = snd_mixer_attach (mixer, hw_id)) < 0){
fprintf(stderr, "Could not attach mixer to card(%s): %s\r\n", hw_id, snd_strerror(err));
snd_mixer_close(mixer);
exit(1);
}
if ((err = snd_mixer_selem_register (mixer, NULL, NULL)) < 0){
fprintf(stderr, "snd_mixer_selem_register: %s\r\n",snd_strerror(err));
snd_mixer_close(mixer);
exit(1);
}
if ((err = snd_mixer_load (mixer)) < 0){
fprintf(stderr, "snd_mixer_load: %s\r\n",snd_strerror(err));
snd_mixer_close(mixer);
exit(1);
}
snd_mixer_elem_t *elem;
elem = snd_mixer_first_elem(mixer);
while(elem) {
const char *elemname = snd_mixer_selem_get_name(elem);
if(strcmp(elemname, "Capture") && strcmp(elemname, "Mic")) {
fprintf(stderr, "Skip setting volume for %s\r\n", elemname);
elem=snd_mixer_elem_next(elem);
continue;
}
if (snd_mixer_selem_has_capture_volume(elem)){
fprintf(stderr, "Set volume for %s\r\n", elemname);
long sndMixerPMin;
long sndMixerPMax;
long newvol;
snd_mixer_selem_get_playback_volume_range(elem, &sndMixerPMin, &sndMixerPMax);
newvol=(((sndMixerPMax-sndMixerPMin)*level)/100)+sndMixerPMin;
snd_mixer_selem_set_capture_volume_all(elem,newvol);
elem=snd_mixer_elem_next(elem);
} else {
fprintf(stderr, "Can't set capture volume\r\n");
exit(1);
}
}
}
void mixerGuiAlsaMix::cardChanged( int card )
{
#ifdef HAVE_ALSA
channelSelect->clear();
// get the cards channels
snd_mixer_t* alsaDev;
snd_mixer_open( &alsaDev, 0);
char device[16];
sprintf(device, "hw:%i", card);
snd_mixer_attach(alsaDev, device );
snd_mixer_selem_register(alsaDev, NULL, NULL);
snd_mixer_load(alsaDev); //load up the mixer
snd_mixer_elem_t* mixerElem = snd_mixer_first_elem(alsaDev);
while( mixerElem != snd_mixer_last_elem(alsaDev) )
{
if(snd_mixer_selem_has_playback_volume(mixerElem) || snd_mixer_selem_has_capture_volume(mixerElem))
channelSelect->addItem( QString( snd_mixer_selem_get_name(mixerElem)), QVariant( snd_mixer_selem_get_name(mixerElem)) );
mixerElem=snd_mixer_elem_next( mixerElem );
}
for(int i=0; i<= channelSelect->count(); i++ )
if( channelSelect->itemData(i) == settings["alsa_channel"].toString() )
channelSelect->setCurrentIndex( i );
#endif
}
static snd_mixer_elem_t *find_mixer_elem_by_name(const char *goal_name)
{
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *sid = NULL;
snd_mixer_selem_id_malloc(&sid);
for (elem = snd_mixer_first_elem(alsa_mixer_handle); elem;
elem = snd_mixer_elem_next(elem)) {
const char *name;
snd_mixer_selem_get_id(elem, sid);
name = snd_mixer_selem_id_get_name(sid);
d_print("name = %s\n", name);
d_print("has playback volume = %d\n", snd_mixer_selem_has_playback_volume(elem));
d_print("has playback switch = %d\n", snd_mixer_selem_has_playback_switch(elem));
if (strcasecmp(name, goal_name) == 0) {
if (!snd_mixer_selem_has_playback_volume(elem)) {
d_print("mixer element `%s' does not have playback volume\n", name);
elem = NULL;
}
break;
}
}
snd_mixer_selem_id_free(sid);
return elem;
}
static int alsa_mixer_open(int *volume_max)
{
snd_mixer_selem_id_t *sid;
snd_mixer_elem_t *elem;
int count;
int rc;
snd_mixer_selem_id_alloca(&sid);
rc = snd_mixer_open(&alsa_mixer_handle, 0);
if (rc < 0)
goto error;
rc = snd_mixer_attach(alsa_mixer_handle, alsa_mixer_device);
if (rc < 0)
goto error;
rc = snd_mixer_selem_register(alsa_mixer_handle, NULL, NULL);
if (rc < 0)
goto error;
rc = snd_mixer_load(alsa_mixer_handle);
if (rc < 0)
goto error;
count = snd_mixer_get_count(alsa_mixer_handle);
if (count == 0) {
d_print("error: mixer does not have elements\n");
return -2;
}
elem = snd_mixer_first_elem(alsa_mixer_handle);
while (elem) {
const char *name;
int has_vol, has_switch;
snd_mixer_selem_get_id(elem, sid);
name = snd_mixer_selem_id_get_name(sid);
d_print("name = %s\n", name);
d_print("has playback volume = %d\n", snd_mixer_selem_has_playback_volume(elem));
d_print("has playback switch = %d\n", snd_mixer_selem_has_playback_switch(elem));
if (strcasecmp(name, alsa_mixer_element)) {
elem = snd_mixer_elem_next(elem);
continue;
}
has_vol = snd_mixer_selem_has_playback_volume(elem);
if (!has_vol) {
d_print("mixer element `%s' does not have playback volume\n", name);
return -2;
}
snd_mixer_selem_get_playback_volume_range(elem,
&mixer_vol_min, &mixer_vol_max);
has_switch = snd_mixer_selem_has_playback_switch(elem);
/* FIXME: get number of channels */
mixer_elem = elem;
*volume_max = mixer_vol_max - mixer_vol_min;
return 0;
}
d_print("error: mixer element `%s' not found\n", alsa_mixer_element);
return -2;
error:
d_print("error: %s\n", snd_strerror(rc));
return -1;
}
void
moko_alsa_volume_control_set_element_from_name (MokoAlsaVolumeControl *control,
const gchar *name)
{
MokoAlsaVolumeControlPrivate *priv =
ALSA_VOLUME_CONTROL_PRIVATE (control);
if (!priv->device) return;
detach_mixer (control);
if (!name) {
moko_alsa_volume_control_set_element (control, NULL);
return;
}
open_mixer (control);
if ((snd_mixer_attach (priv->mixer_handle, priv->device) == 0) &&
(snd_mixer_selem_register (priv->mixer_handle, NULL, NULL) == 0) &&
(snd_mixer_load (priv->mixer_handle) == 0)) {
snd_mixer_elem_t *elem;
elem = snd_mixer_first_elem (priv->mixer_handle);
while (elem) {
const char *elem_name = snd_mixer_selem_get_name (elem);
if (strcmp (elem_name, name) == 0)
break;
elem = snd_mixer_elem_next (elem);
}
if (!elem) {
snd_mixer_detach (priv->mixer_handle, priv->device);
close_mixer (control);
g_warning ("Mixer element '%s' not found", name);
attach_mixer (control);
} else {
snd_mixer_selem_id_t *id;
if (snd_mixer_selem_id_malloc (&id) != 0) {
g_warning ("Unable to allocate element id");
snd_mixer_detach (
priv->mixer_handle, priv->device);
close_mixer (control);
} else {
snd_mixer_selem_get_id (elem, id);
snd_mixer_detach (
priv->mixer_handle, priv->device);
close_mixer (control);
g_debug ("Setting element ID");
moko_alsa_volume_control_set_element (
control, id);
snd_mixer_selem_id_free (id);
}
}
} else
g_warning ("Unable to open mixer on card '%s'", priv->device);
}
static int initialize_mixer_device(struct audio_info_struct *ai, char *error)
{
int sts;
snd_mixer_t *mixer;
char *mixerdev = "default";
const char *elemnam;
snd_mixer_elem_t *mixerelem;
sts = snd_mixer_open(&mixer, 0);
if (sts) {
if (error) {
sprintf(error, "snd_mixer_open failed; %d\n", sts);
}
return 1;
}
if (mixer) {
sts = snd_mixer_attach(mixer, mixerdev);
if (sts) {
if (error) {
sprintf(error, "snd_mixer_attach: failed; %d\n", sts);
}
return 1;
}
sts = snd_mixer_selem_register(mixer, NULL, NULL);
if (sts) {
if (error) {
sprintf(error, "snd_mixer_selem_register: failed; %d\n", sts);
}
return 1;
}
sts = snd_mixer_load(mixer);
if (sts) {
if (error) {
sprintf(error, "snd_mixer_selem_register: failed; %d\n", sts);
}
return 1;
}
mixerelem = snd_mixer_first_elem(mixer);
snd_mixer_set_callback(mixer, mixer_callback_func);
while (mixerelem) {
elemnam = snd_mixer_selem_get_name(mixerelem);
if (strcasecmp(elemnam, "Master") == 0) {
ai->vh = mixerelem;
return 0;
}
mixerelem = snd_mixer_elem_next(mixerelem);
}
}
return 1;
}
void asound_setup(const gchar * card, const gchar * channel,
void (*volume_changed)(int,gboolean))
{
// Make sure (for now) that the setup function only gets called once
static int asound_setup_called = 0;
assert(asound_setup_called == 0);
asound_setup_called++;
// Save card, volume_changed
strcpy(m_card, card);
m_volume_changed = volume_changed;
// Load the mixer for the provided cardname
snd_mixer_open(&m_mixer, 0);
snd_mixer_attach(m_mixer, m_card);
snd_mixer_selem_register(m_mixer, NULL, NULL);
snd_mixer_load(m_mixer);
// Setup g_io_watch for the mixer
int count = snd_mixer_poll_descriptors_count(m_mixer);
if(count >= 1)
{
struct pollfd pfd;
count = snd_mixer_poll_descriptors(m_mixer, &pfd, 1);
if(count == 1)
{
GIOChannel * giochannel = g_io_channel_unix_new(pfd.fd);
g_io_add_watch_full(giochannel, G_PRIORITY_DEFAULT,
G_IO_IN, asound_poll_cb, NULL, NULL);
}
}
// Iterate over the elements in the mixer and store them in m_channel_names
int elemcount = snd_mixer_get_count(m_mixer);
snd_mixer_elem_t * elem = snd_mixer_first_elem(m_mixer);
int loop;
for(loop = 0; loop < elemcount; loop++)
{
const char * elemname = snd_mixer_selem_get_name(elem);
if(snd_mixer_selem_has_playback_volume(elem))
{
m_channel_names = g_list_append(m_channel_names,
(gpointer)g_strdup(elemname));
}
elem = snd_mixer_elem_next(elem);
}
// Setup m_elem using the provided channelname
if(channel != NULL && asound_channel_exists(channel))
asound_set_channel(channel);
else if(m_channel_names != NULL)
asound_set_channel((const gchar*)m_channel_names->data);
}
snd_mixer_elem_t* AlsaMixer::get_first_playback_elem()
{
snd_mixer_elem_t* elem;
for (elem = snd_mixer_first_elem(this->handle);
elem;
elem = snd_mixer_elem_next(elem))
{
if (snd_mixer_selem_is_active(elem) &&
snd_mixer_selem_has_playback_volume(elem))
return elem;
}
}
static void set_mixer_element(snd_mixer_t *mixer,const char *name, int level,MixerAction action){
const char *elemname;
snd_mixer_elem_t *elem;
long sndMixerPMin=0;
long sndMixerPMax=0;
long newvol=0;
elem=snd_mixer_first_elem(mixer);
while (elem!=NULL){
elemname=snd_mixer_selem_get_name(elem);
//ms_message("Found alsa mixer element %s.",elemname);
if (strcmp(elemname,name)==0){
switch(action){
case CAPTURE:
if (snd_mixer_selem_has_capture_volume(elem)){
snd_mixer_selem_get_capture_volume_range(elem, &sndMixerPMin, &sndMixerPMax);
newvol=(((sndMixerPMax-sndMixerPMin)*level)/100)+sndMixerPMin;
snd_mixer_selem_set_capture_volume_all(elem,newvol);
//ms_message("Successfully set capture level for %s.",elemname);
return;
}
break;
case PLAYBACK:
if (snd_mixer_selem_has_playback_volume(elem)){
snd_mixer_selem_get_playback_volume_range(elem, &sndMixerPMin, &sndMixerPMax);
newvol=(((sndMixerPMax-sndMixerPMin)*level)/100)+sndMixerPMin;
snd_mixer_selem_set_playback_volume_all(elem,newvol);
//ms_message("Successfully set playback level for %s.",elemname);
return;
}
break;
case CAPTURE_SWITCH:
if (snd_mixer_selem_has_capture_switch(elem)){
snd_mixer_selem_set_capture_switch_all(elem,level);
//ms_message("Successfully set capture switch for %s.",elemname);
}
break;
case PLAYBACK_SWITCH:
if (snd_mixer_selem_has_playback_switch(elem)){
snd_mixer_selem_set_playback_switch_all(elem,level);
//ms_message("Successfully set capture switch for %s.",elemname);
}
break;
}
}
elem=snd_mixer_elem_next(elem);
}
return ;
}
snd_mixer_elem_t* AlsaMixer::get_playback_elem(const std::string name)
{
snd_mixer_elem_t* elem;
for (elem = snd_mixer_first_elem(this->handle);
elem;
elem = snd_mixer_elem_next(elem))
{
if (snd_mixer_selem_is_active(elem) &&
snd_mixer_selem_has_playback_volume(elem) &&
(name == snd_mixer_selem_get_name(elem)))
return elem;
}
}
int
sa_stream_set_volume_abs(sa_stream_t *s, float vol) {
snd_mixer_t* mixer = 0;
snd_mixer_elem_t* elem = 0;
if (s == NULL || s->output_unit == NULL) {
return SA_ERROR_NO_INIT;
}
if (snd_mixer_open(&mixer, 0) < 0) {
return SA_ERROR_SYSTEM;
}
if (snd_mixer_attach(mixer, "default") < 0) {
snd_mixer_close(mixer);
return SA_ERROR_SYSTEM;
}
if (snd_mixer_selem_register(mixer, NULL, NULL) < 0) {
snd_mixer_close(mixer);
return SA_ERROR_SYSTEM;
}
if (snd_mixer_load(mixer) < 0) {
snd_mixer_close(mixer);
return SA_ERROR_SYSTEM;
}
#if 0
snd_mixer_elem_t* elem = 0;
for (elem = snd_mixer_first_elem(mixer); elem != NULL; elem = snd_mixer_elem_next(elem)) {
if (snd_mixer_selem_has_playback_volume(elem)) {
printf("Playback %s\n", snd_mixer_selem_get_name(elem));
}
else {
printf("No Playback: %s\n", snd_mixer_selem_get_name(elem));
}
}
#endif
elem = snd_mixer_first_elem(mixer);
if (elem && snd_mixer_selem_has_playback_volume(elem)) {
long min = 0;
long max = 0;
if (snd_mixer_selem_get_playback_volume_range(elem, &min, &max) >= 0) {
snd_mixer_selem_set_playback_volume_all(elem, (max-min)*vol + min);
}
}
snd_mixer_close(mixer);
return SA_SUCCESS;
}
static int get_mixer_element(snd_mixer_t *mixer,const char *name, MixerAction action){
long value=0;
const char *elemname;
snd_mixer_elem_t *elem;
int err;
long sndMixerPMin=0;
long sndMixerPMax=0;
long newvol=0;
elem=snd_mixer_first_elem(mixer);
while (elem!=NULL){
elemname=snd_mixer_selem_get_name(elem);
//ms_message("Found alsa mixer element %s.",elemname);
if (strcmp(elemname,name)==0){
switch (action){
case CAPTURE:
if (snd_mixer_selem_has_capture_volume(elem)){
snd_mixer_selem_get_capture_volume_range(elem, &sndMixerPMin, &sndMixerPMax);
err=snd_mixer_selem_get_capture_volume(elem,SND_MIXER_SCHN_UNKNOWN,&newvol);
newvol-=sndMixerPMin;
value=(100*newvol)/(sndMixerPMax-sndMixerPMin);
if (err<0) ms_warning("Could not get capture volume for %s:%s",name,snd_strerror(err));
//else ms_message("Successfully get capture level for %s.",elemname);
break;
}
break;
case PLAYBACK:
if (snd_mixer_selem_has_playback_volume(elem)){
snd_mixer_selem_get_playback_volume_range(elem, &sndMixerPMin, &sndMixerPMax);
err=snd_mixer_selem_get_playback_volume(elem,SND_MIXER_SCHN_FRONT_LEFT,&newvol);
newvol-=sndMixerPMin;
value=(100*newvol)/(sndMixerPMax-sndMixerPMin);
if (err<0) ms_warning("Could not get playback volume for %s:%s",name,snd_strerror(err));
//else ms_message("Successfully get playback level for %s.",elemname);
break;
}
break;
case CAPTURE_SWITCH:
break;
case PLAYBACK_SWITCH:
break;
}
}
elem=snd_mixer_elem_next(elem);
}
return value;
}
/*
* The purpose of this function is to let the user to select
* the input where he plugged his signals.
* Now if user select "default", as device, we have to select the input
* on the mixer of the card used by "default".
* What is the card used by device "default" ?
*/
static void
as_setup_input_combo (GtkWidget *combo, SoundParams *sparams)
{
snd_mixer_t *handle;
int i ;
snd_mixer_selem_id_t *sid;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_alloca(&sid);
char *devname;
char name[32];
devname = sparams->device_name;
if ( *sparams->indexstr == '-' ) {
sprintf(name, "hw:%d", sparams->firstcard);
devname = name;
}
handle = sound_open_mixer(devname);
if ( handle == NULL ){
return ;
}
for (elem = snd_mixer_first_elem(handle); elem; elem = snd_mixer_elem_next(elem)) {
snd_mixer_selem_get_id(elem, sid);
if (! snd_mixer_selem_is_active(elem)) {
continue;
}
const char *control_name = snd_mixer_selem_id_get_name(sid);
// printf("Simple mixer control '%s',%i\n", control_name, snd_mixer_selem_id_get_index(sid));
if (snd_mixer_selem_is_enum_capture(elem)) {
int items;
char itemname[40];
app_free(sparams->control_name);
sparams->control_name = app_strdup(control_name);
items = snd_mixer_selem_get_enum_items(elem);
// printf(" Items:");
for (i = 0; i < items; i++) {
snd_mixer_selem_get_enum_item_name(elem, i, sizeof(itemname) - 1, itemname);
// printf(" '%s'", itemname);
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), itemname );
if ( i == sparams->input ) {
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), i);
}
}
// printf("\n");
}
}
snd_mixer_close(handle);
return ;
}
static enum MixerCode alsaMixerSelectCard(struct MixerSystem* system, int mixerId) {
enum MixerCode code;
snd_mixer_elem_t* mixerElem = NULL;
AlsaMixerCard* card = (AlsaMixerCard*)system->active;
if ( !card ) {
if ( card == system->mixerCard->pElement[mixerId] ) {
return MIXER_CODE_OK;
}
alsaMixerCardClose(system);
}
code = commonMixerSelectCard(system, mixerId);
if ( code != MIXER_CODE_OK ) {
GOC_DEBUG("Cannot select card by commonMixerSelectCard");
return code;
}
card = (AlsaMixerCard*)system->active;
GOC_CHEOP_DEBUG(snd_mixer_open( &card->sndmixer, 0 ) == 0, return MIXER_CODE_CANNOT_OPEN_CARD);
GOC_CHEOP_DEBUG(snd_mixer_attach( card->sndmixer, card->physicalName ) == 0, return MIXER_CODE_CANNOT_OPEN_CARD);
GOC_CHEOP_DEBUG(snd_mixer_selem_register( card->sndmixer, NULL, NULL ) == 0, return MIXER_CODE_CANNOT_OPEN_CARD);
GOC_CHEOP_DEBUG(snd_mixer_load( card->sndmixer ) == 0, return MIXER_CODE_CANNOT_OPEN_CARD);
mixerElem = snd_mixer_first_elem( card->sndmixer );
while ( mixerElem ) {
AlsaMixerElement* pMixerElement = alsaMixerElementAlloc();
for (int channel = 0; channel <= SND_MIXER_SCHN_LAST; channel++ ) {
if ( snd_mixer_selem_has_playback_channel(mixerElem, channel)
&& snd_mixer_selem_get_playback_volume_range(mixerElem, &pMixerElement->rangemin, &pMixerElement->rangemax) == 0
&& snd_mixer_selem_get_playback_volume(mixerElem, channel, &pMixerElement->volume) == 0 ) {
pMixerElement->name = goc_stringCopy(NULL, snd_mixer_selem_get_name(mixerElem));
pMixerElement->type = MIXER_ELEMENT_PLAYBACK;
pMixerElement->sndelement = mixerElem;
card->mixerElement = goc_arrayAdd( card->mixerElement, pMixerElement );
break;
} else if ( snd_mixer_selem_has_capture_channel(mixerElem, channel)
&& snd_mixer_selem_get_capture_volume_range(mixerElem, &pMixerElement->rangemin, &pMixerElement->rangemax) == 0
&& snd_mixer_selem_get_capture_volume(mixerElem, channel, &pMixerElement->volume) == 0 ) {
pMixerElement->name = goc_stringCopy(NULL, snd_mixer_selem_get_name(mixerElem));
pMixerElement->type = MIXER_ELEMENT_CAPTURE;
pMixerElement->sndelement = mixerElem;
card->mixerElement = goc_arrayAdd( card->mixerElement, pMixerElement );
break;
}
}
mixerElem = snd_mixer_elem_next( mixerElem );
}
return MIXER_CODE_OK;
}
void list_mixers(const char *output_device) {
int err;
snd_mixer_t *handle;
snd_mixer_selem_id_t *sid;
snd_mixer_elem_t *elem;
char *ctl = ctl4device(output_device);
snd_mixer_selem_id_alloca(&sid);
LOG_INFO("listing mixers for: %s", output_device);
if ((err = snd_mixer_open(&handle, 0)) < 0) {
LOG_ERROR("open error: %s", snd_strerror(err));
return;
}
if ((err = snd_mixer_attach(handle, ctl)) < 0) {
LOG_ERROR("attach error: %s", snd_strerror(err));
snd_mixer_close(handle);
free(ctl);
return;
}
free(ctl);
if ((err = snd_mixer_selem_register(handle, NULL, NULL)) < 0) {
LOG_ERROR("register error: %s", snd_strerror(err));
snd_mixer_close(handle);
return;
}
if ((err = snd_mixer_load(handle)) < 0) {
LOG_ERROR("load error: %s", snd_strerror(err));
snd_mixer_close(handle);
return;
}
printf("Volume controls for %s\n", output_device);
for (elem = snd_mixer_first_elem(handle); elem; elem = snd_mixer_elem_next(elem)) {
if (snd_mixer_selem_has_playback_volume(elem)) {
snd_mixer_selem_get_id(elem, sid);
printf(" %s", snd_mixer_selem_id_get_name(sid));
if (snd_mixer_selem_id_get_index(sid)) {
printf(",%d", snd_mixer_selem_id_get_index(sid));
}
printf("\n");
}
}
printf("\n");
snd_mixer_close(handle);
}
void SoundPref::getMixerDevices(int mode)
{
snd_mixer_t *mixer;
QComboBox *cmb;
if (mode == modePlayback)
cmb = ui.playbackMixerDeviceCmb;
else {
// TODO : capture mixer devices
}
cmb->clear();
int err;
if ((err = snd->getMixer(&mixer, mixerCard)) < 0) {
return;
}
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *sid;
snd_mixer_selem_id_alloca(&sid);
int indx = 0;
int current = -1;
cmb->addItem("");
for (elem = snd_mixer_first_elem(mixer); elem; elem = snd_mixer_elem_next(elem)) {
snd_mixer_selem_get_id(elem, sid);
if (!snd_mixer_selem_is_active(elem))
continue;
QString device = snd_mixer_selem_id_get_name(sid);
if (mode == modePlayback) {
if (snd_mixer_selem_has_playback_volume(elem))
cmb->addItem(device);
} else if (mode == modeCapture) {
// TODO:
} else
continue;
if (device == mixerDevice) {
current = indx;
}
indx ++;
}
if (current >= 0)
cmb->setCurrentIndex(current+1);
snd_mixer_close(mixer);
}
static snd_mixer_elem_t*
find_playback_mixer_element(snd_mixer_t *mixer, const char *name)
{
snd_mixer_elem_t *mixer_elem;
for (mixer_elem = snd_mixer_first_elem(mixer);
mixer_elem != NULL;
mixer_elem = snd_mixer_elem_next(mixer_elem)) {
const char *elem_name = snd_mixer_selem_get_name(mixer_elem);
if ((elem_name != NULL) &&
snd_mixer_selem_has_playback_volume(mixer_elem) &&
(!strcmp(name, elem_name))) {
return mixer_elem;
}
}
return NULL;
}
INT32 PORT_GetPortCount(void* id) {
PortMixer* portMixer;
snd_mixer_elem_t *elem;
TRACE0("> PORT_GetPortCount\n");
if (id == NULL) {
// $$mp: Should become a descriptive error code (invalid handle).
return -1;
}
portMixer = (PortMixer*) id;
if (portMixer->numElems == 0) {
for (elem = snd_mixer_first_elem(portMixer->mixer_handle); elem; elem = snd_mixer_elem_next(elem)) {
if (!snd_mixer_selem_is_active(elem))
continue;
TRACE2("Simple mixer control '%s',%i\n",
snd_mixer_selem_get_name(elem),
snd_mixer_selem_get_index(elem));
if (snd_mixer_selem_has_playback_volume(elem)) {
portMixer->elems[portMixer->numElems] = elem;
portMixer->types[portMixer->numElems] = PORT_DST_UNKNOWN;
portMixer->numElems++;
}
// to prevent buffer overflow
if (portMixer->numElems >= MAX_ELEMS) {
break;
}
/* If an element has both playback an capture volume, it is put into the arrays
twice. */
if (snd_mixer_selem_has_capture_volume(elem)) {
portMixer->elems[portMixer->numElems] = elem;
portMixer->types[portMixer->numElems] = PORT_SRC_UNKNOWN;
portMixer->numElems++;
}
// to prevent buffer overflow
if (portMixer->numElems >= MAX_ELEMS) {
break;
}
}
}
TRACE0("< PORT_GetPortCount\n");
return portMixer->numElems;
}
int init_alsa_volume_control(char *name)
{
snd_mixer_open(&mixer,0);
snd_mixer_attach(mixer,name);
snd_mixer_selem_register(mixer,NULL,NULL);
snd_mixer_load(mixer);
mixerelem = snd_mixer_first_elem(mixer);
while (mixerelem) {
/* It should work on most of the systems. Tested on Debian, Fedora, Gentoo, Ubuntu, RedHat, CentOS */
if (strcasecmp(snd_mixer_selem_get_name(mixerelem), "Master") == 0) {
snd_mixer_selem_get_playback_volume_range(mixerelem,&volume_min,&volume_max);
return 0;
}
mixerelem = snd_mixer_elem_next(mixerelem);
}
return 1;
}
void lamixer_mixer_init(char card[64])
{
snd_mixer_elem_t *elem;
gint err;
snd_mixer_selem_id_alloca(&sid);
err = snd_mixer_open (&mixer_handle, 0);
err = snd_mixer_attach (mixer_handle, card);
err = snd_mixer_selem_register (mixer_handle, NULL, NULL);
err = snd_mixer_load (mixer_handle);
for (elem = snd_mixer_first_elem(mixer_handle); elem; elem = snd_mixer_elem_next(elem)) {
snd_mixer_selem_get_id(elem, sid);
if (!snd_mixer_selem_is_active(elem))
continue;
VolumeBoxes = g_list_append(VolumeBoxes, lamixer_volelem_new(elem));
}
}
void set_state(char *elem_name, int state)
{
snd_mixer_elem_t *elem;
for ( elem = snd_mixer_first_elem( mixerFd); elem; elem = snd_mixer_elem_next( elem) ) {
printf("want %s, found %s\n",
elem_name,
snd_mixer_selem_get_name( elem)
);
if (elem_name && strcmp(elem_name,snd_mixer_selem_get_name( elem)))
continue;
snd_mixer_selem_set_playback_switch_all(elem, state);
}
}
void NeoControl::updateMixer()
{
if(screen != ScreenMixer)
{
return;
}
if(slider4->sliding || slider5->sliding)
{
QTimer::singleShot(100, this, SLOT(updateMixer()));
return;
}
snd_mixer_elem_t *elem;
snd_mixer_elem_t *elem4 = NULL;
snd_mixer_elem_t *elem5 = NULL;
for (elem = snd_mixer_first_elem(mixerFd); elem;
elem = snd_mixer_elem_next(elem)) {
QString elemName = QString(snd_mixer_selem_get_name(elem));
if(elemName == "Speaker")
{
elem4 = elem;
}
else if(elemName == "Mono Playback")
{
elem5 = elem;
}
}
slider4->setMixerElem(elem4, true);
slider5->setMixerElem(elem5, true);
label4->setText(tr("Playback (control.4) %1").arg(slider4->volume)); // Mono Playback Volume
label5->setText(tr("Microphone (control.5) %1").arg(slider5->volume)); // Mono Sidetone Playback Volume
label->setText(tr("Call volume settings"));
QTimer::singleShot(1000, this, SLOT(updateMixer()));
}
/**
* Get all playable channels for a single alsa card and
* return them as a GSList.
*
* @param card HCTL name of the alsa card
* @return the GSList of channels
*/
static GSList *
get_channels(const char *card)
{
int ccount, i;
snd_mixer_t *mixer;
snd_mixer_elem_t *telem;
GSList *channels = NULL;
mixer = open_mixer(card, NULL, 0);
if (mixer == NULL)
return NULL;
ccount = snd_mixer_get_count(mixer);
telem = snd_mixer_first_elem(mixer);
for (i = 0; i < ccount; i++) {
if (snd_mixer_selem_has_playback_volume(telem))
channels = g_slist_append(channels,
strdup(snd_mixer_selem_get_name(telem)));
telem = snd_mixer_elem_next(telem);
}
#ifdef DEBUG
GSList *tmp = channels;
if (tmp) {
printf("Card %s: available channels\n", card);
while (tmp) {
printf("\t%s\n", (char *) tmp->data);
tmp = tmp->next;
}
} else {
printf("Card %s: no playable channels\n", card);
}
#endif
close_mixer(mixer, card);
return channels;
}
static void get_mixer_name(struct alsa_factory *af)
{
snd_mixer_t *handle;
snd_mixer_elem_t *elem;
if (snd_mixer_open(&handle, 0) < 0)
return;
if (snd_mixer_attach(handle, "default") < 0) {
snd_mixer_close(handle);
return;
}
if (snd_mixer_selem_register(handle, NULL, NULL) < 0) {
snd_mixer_close(handle);
return;
}
if (snd_mixer_load(handle) < 0) {
snd_mixer_close(handle);
return;
}
for (elem = snd_mixer_first_elem(handle); elem;
elem = snd_mixer_elem_next(elem))
{
if (snd_mixer_selem_is_active(elem) &&
snd_mixer_selem_has_playback_volume(elem))
{
pj_ansi_strncpy(af->pb_mixer_name, snd_mixer_selem_get_name(elem),
sizeof(af->pb_mixer_name));
TRACE_((THIS_FILE, "Playback mixer name: %s", af->pb_mixer_name));
break;
}
}
snd_mixer_close(handle);
}
/* openmoko_mixer_open */
static int _openmoko_mixer_open(Openmoko * openmoko)
{
#ifdef __linux__
PhonePluginHelper * helper = openmoko->helper;
char const * audio_device;
snd_mixer_elem_t * elem;
openmoko->mixer_elem = NULL;
openmoko->mixer_elem_headphone = NULL;
openmoko->mixer_elem_speaker = NULL;
if((audio_device = helper->config_get(helper->phone, "openmoko",
"audio_device")) == NULL)
audio_device = "hw:0";
if(snd_mixer_open(&openmoko->mixer, 0) != 0)
{
openmoko->mixer = NULL;
return -1;
}
if(snd_mixer_attach(openmoko->mixer, audio_device) != 0
|| snd_mixer_selem_register(openmoko->mixer, NULL, NULL)
|| snd_mixer_load(openmoko->mixer) != 0)
{
_openmoko_mixer_close(openmoko);
return -1;
}
for(elem = snd_mixer_first_elem(openmoko->mixer); elem != NULL;
elem = snd_mixer_elem_next(elem))
if(strcmp(snd_mixer_selem_get_name(elem), "Headphone") == 0
&& snd_mixer_selem_has_playback_volume(elem))
openmoko->mixer_elem_headphone = elem;
else if(strcmp(snd_mixer_selem_get_name(elem), "Speaker") == 0
&& snd_mixer_selem_has_playback_volume(elem))
openmoko->mixer_elem_speaker = elem;
#endif /* __linux__ */
return 0;
}
ALSAMixer::ALSAMixer()
{
int err;
initMixer (&mMixer[SND_PCM_STREAM_PLAYBACK], "AndroidOut");
initMixer (&mMixer[SND_PCM_STREAM_CAPTURE], "AndroidIn");
snd_mixer_selem_id_t *sid;
snd_mixer_selem_id_alloca(&sid);
for (int i = 0; i <= SND_PCM_STREAM_LAST; i++) {
if (!mMixer[i]) continue;
mixer_info_t *info = mixerMasterProp[i].mInfo = new mixer_info_t;
property_get (mixerMasterProp[i].propName,
info->name,
mixerMasterProp[i].propDefault);
for (snd_mixer_elem_t *elem = snd_mixer_first_elem(mMixer[i]);
elem;
elem = snd_mixer_elem_next(elem)) {
if (!snd_mixer_selem_is_active(elem))
continue;
snd_mixer_selem_get_id(elem, sid);
// Find PCM playback volume control element.
const char *elementName = snd_mixer_selem_id_get_name(sid);
if (info->elem == NULL &&
strcmp(elementName, info->name) == 0 &&
hasVolume[i] (elem)) {
info->elem = elem;
getVolumeRange[i] (elem, &info->min, &info->max);
//info->volume = info->max;
//setVol[i] (elem, info->volume);
//if (i == SND_PCM_STREAM_PLAYBACK &&
// snd_mixer_selem_has_playback_switch (elem))
// snd_mixer_selem_set_playback_switch_all (elem, 1);
break;
}
}
ALOGV("Mixer: master '%s' %s.", info->name, info->elem ? "found" : "not found");
for (int j = 0; mixerProp[j][i].device; j++) {
mixer_info_t *info = mixerProp[j][i].mInfo = new mixer_info_t;
property_get (mixerProp[j][i].propName,
info->name,
mixerProp[j][i].propDefault);
for (snd_mixer_elem_t *elem = snd_mixer_first_elem(mMixer[i]);
elem;
elem = snd_mixer_elem_next(elem)) {
if (!snd_mixer_selem_is_active(elem))
continue;
snd_mixer_selem_get_id(elem, sid);
// Find PCM playback volume control element.
const char *elementName = snd_mixer_selem_id_get_name(sid);
if (info->elem == NULL &&
strcmp(elementName, info->name) == 0 &&
hasVolume[i] (elem)) {
info->elem = elem;
getVolumeRange[i] (elem, &info->min, &info->max);
//info->volume = info->max;
//setVol[i] (elem, info->volume);
//if (i == SND_PCM_STREAM_PLAYBACK &&
// snd_mixer_selem_has_playback_switch (elem))
// snd_mixer_selem_set_playback_switch_all (elem, 1);
break;
}
}
ALOGV("Mixer: route '%s' %s.", info->name, info->elem ? "found" : "not found");
}
}
ALOGV("mixer initialized.");
}
static void
alsa_configure (struct sound_device *sd)
{
int val, err, dir;
unsigned uval;
struct alsa_params *p = (struct alsa_params *) sd->data;
snd_pcm_uframes_t buffer_size;
xassert (p->handle != 0);
err = snd_pcm_hw_params_malloc (&p->hwparams);
if (err < 0)
alsa_sound_perror ("Could not allocate hardware parameter structure", err);
err = snd_pcm_sw_params_malloc (&p->swparams);
if (err < 0)
alsa_sound_perror ("Could not allocate software parameter structure", err);
err = snd_pcm_hw_params_any (p->handle, p->hwparams);
if (err < 0)
alsa_sound_perror ("Could not initialize hardware parameter structure", err);
err = snd_pcm_hw_params_set_access (p->handle, p->hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0)
alsa_sound_perror ("Could not set access type", err);
val = sd->format;
err = snd_pcm_hw_params_set_format (p->handle, p->hwparams, val);
if (err < 0)
alsa_sound_perror ("Could not set sound format", err);
uval = sd->sample_rate;
err = snd_pcm_hw_params_set_rate_near (p->handle, p->hwparams, &uval, 0);
if (err < 0)
alsa_sound_perror ("Could not set sample rate", err);
val = sd->channels;
err = snd_pcm_hw_params_set_channels (p->handle, p->hwparams, val);
if (err < 0)
alsa_sound_perror ("Could not set channel count", err);
err = snd_pcm_hw_params (p->handle, p->hwparams);
if (err < 0)
alsa_sound_perror ("Could not set parameters", err);
err = snd_pcm_hw_params_get_period_size (p->hwparams, &p->period_size, &dir);
if (err < 0)
alsa_sound_perror ("Unable to get period size for playback", err);
err = snd_pcm_hw_params_get_buffer_size (p->hwparams, &buffer_size);
if (err < 0)
alsa_sound_perror("Unable to get buffer size for playback", err);
err = snd_pcm_sw_params_current (p->handle, p->swparams);
if (err < 0)
alsa_sound_perror ("Unable to determine current swparams for playback",
err);
/* Start the transfer when the buffer is almost full */
err = snd_pcm_sw_params_set_start_threshold (p->handle, p->swparams,
(buffer_size / p->period_size)
* p->period_size);
if (err < 0)
alsa_sound_perror ("Unable to set start threshold mode for playback", err);
/* Allow the transfer when at least period_size samples can be processed */
err = snd_pcm_sw_params_set_avail_min (p->handle, p->swparams, p->period_size);
if (err < 0)
alsa_sound_perror ("Unable to set avail min for playback", err);
err = snd_pcm_sw_params (p->handle, p->swparams);
if (err < 0)
alsa_sound_perror ("Unable to set sw params for playback\n", err);
snd_pcm_hw_params_free (p->hwparams);
p->hwparams = NULL;
snd_pcm_sw_params_free (p->swparams);
p->swparams = NULL;
err = snd_pcm_prepare (p->handle);
if (err < 0)
alsa_sound_perror ("Could not prepare audio interface for use", err);
if (sd->volume > 0)
{
int chn;
snd_mixer_t *handle;
snd_mixer_elem_t *e;
const char *file = sd->file ? sd->file : DEFAULT_ALSA_SOUND_DEVICE;
if (snd_mixer_open (&handle, 0) >= 0)
{
if (snd_mixer_attach (handle, file) >= 0
&& snd_mixer_load (handle) >= 0
&& snd_mixer_selem_register (handle, NULL, NULL) >= 0)
for (e = snd_mixer_first_elem (handle);
e;
e = snd_mixer_elem_next (e))
{
if (snd_mixer_selem_has_playback_volume (e))
{
long pmin, pmax, vol;
snd_mixer_selem_get_playback_volume_range (e, &pmin, &pmax);
vol = pmin + (sd->volume * (pmax - pmin)) / 100;
for (chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++)
snd_mixer_selem_set_playback_volume (e, chn, vol);
}
}
snd_mixer_close(handle);
}
}
}
static void
gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
{
gint i, count;
snd_mixer_elem_t *element, *master;
GList *item;
g_return_if_fail (mixer->handle != NULL);
if (mixer->tracklist)
return;
g_static_rec_mutex_lock (mixer->rec_mutex);
master = gst_alsa_mixer_find_master_mixer (mixer, mixer->handle);
count = snd_mixer_get_count (mixer->handle);
element = snd_mixer_first_elem (mixer->handle);
/* build track list
*
* Some ALSA tracks may have playback and capture capabilities.
* Here we model them as two separate GStreamer tracks.
*/
for (i = 0; i < count; i++) {
GstMixerTrack *play_track = NULL;
GstMixerTrack *cap_track = NULL;
const gchar *name;
GList *item;
gint samename = 0;
name = snd_mixer_selem_get_name (element);
/* prevent dup names */
for (item = mixer->tracklist; item != NULL; item = item->next) {
snd_mixer_elem_t *temp;
if (GST_IS_ALSA_MIXER_OPTIONS (item->data))
temp = GST_ALSA_MIXER_OPTIONS (item->data)->element;
else
temp = GST_ALSA_MIXER_TRACK (item->data)->element;
if (strcmp (name, snd_mixer_selem_get_name (temp)) == 0)
samename++;
}
GST_LOG ("[%s] probing element #%u, mixer->dir=%u", name, i, mixer->dir);
if (mixer->dir & GST_ALSA_MIXER_PLAYBACK) {
gboolean has_playback_switch, has_playback_volume;
has_playback_switch = snd_mixer_selem_has_playback_switch (element);
has_playback_volume = snd_mixer_selem_has_playback_volume (element);
GST_LOG ("[%s] PLAYBACK: has_playback_volume=%d, has_playback_switch=%d"
"%s", name, has_playback_volume, has_playback_switch,
(element == master) ? " MASTER" : "");
if (has_playback_volume) {
gint flags = GST_MIXER_TRACK_OUTPUT;
if (element == master)
flags |= GST_MIXER_TRACK_MASTER;
play_track = gst_alsa_mixer_track_new (element, samename, i,
flags, FALSE, NULL, FALSE);
} else if (has_playback_switch) {
/* simple mute switch */
play_track = gst_alsa_mixer_track_new (element, samename, i,
GST_MIXER_TRACK_OUTPUT, TRUE, NULL, FALSE);
}
if (snd_mixer_selem_is_enumerated (element)) {
GstMixerOptions *opts = gst_alsa_mixer_options_new (element, i);
GST_LOG ("[%s] is enumerated (%d)", name, i);
mixer->tracklist = g_list_append (mixer->tracklist, opts);
}
}
if (mixer->dir & GST_ALSA_MIXER_CAPTURE) {
gboolean has_capture_switch, has_common_switch;
gboolean has_capture_volume, has_common_volume;
has_capture_switch = snd_mixer_selem_has_capture_switch (element);
has_common_switch = snd_mixer_selem_has_common_switch (element);
has_capture_volume = snd_mixer_selem_has_capture_volume (element);
has_common_volume = snd_mixer_selem_has_common_volume (element);
GST_LOG ("[%s] CAPTURE: has_capture_volume=%d, has_common_volume=%d, "
"has_capture_switch=%d, has_common_switch=%d, play_track=%p", name,
has_capture_volume, has_common_volume, has_capture_switch,
has_common_switch, play_track);
if (has_capture_volume && !(play_track && has_common_volume)) {
cap_track = gst_alsa_mixer_track_new (element, samename, i,
GST_MIXER_TRACK_INPUT, FALSE, NULL, play_track != NULL);
} else if (has_capture_switch && !(play_track && has_common_switch)) {
cap_track = gst_alsa_mixer_track_new (element, samename, i,
GST_MIXER_TRACK_INPUT, TRUE, NULL, play_track != NULL);
}
}
if (play_track && cap_track) {
GST_ALSA_MIXER_TRACK (play_track)->shared_mute =
GST_ALSA_MIXER_TRACK (cap_track);
GST_ALSA_MIXER_TRACK (cap_track)->shared_mute =
GST_ALSA_MIXER_TRACK (play_track);
}
if (play_track)
mixer->tracklist = g_list_append (mixer->tracklist, play_track);
if (cap_track)
mixer->tracklist = g_list_append (mixer->tracklist, cap_track);
element = snd_mixer_elem_next (element);
}
for (item = mixer->tracklist; item != NULL; item = item->next) {
snd_mixer_elem_t *temp;
if (GST_IS_ALSA_MIXER_OPTIONS (item->data))
temp = GST_ALSA_MIXER_OPTIONS (item->data)->element;
else
temp = GST_ALSA_MIXER_TRACK (item->data)->element;
snd_mixer_elem_set_callback (temp, gst_alsa_mixer_elem_handle_callback);
snd_mixer_elem_set_callback_private (temp, mixer);
}
g_static_rec_mutex_unlock (mixer->rec_mutex);
}
static int open_mixer(PxDev *dev, int card, int playback)
{
snd_mixer_elem_t *elem;
char name[256];
int err;
int i;
sprintf(name, "hw:%d", card);
dev->card = card;
dev->handle = NULL;
do {
err = snd_mixer_open(&dev->handle, 0);
if (err < 0) {
break;
}
err = snd_mixer_attach(dev->handle, name);
if (err < 0) {
break;
}
err = snd_mixer_selem_register(dev->handle, NULL, NULL);
if (err < 0) {
break;
}
err = snd_mixer_load(dev->handle);
if (err < 0) {
break;
}
for (elem = snd_mixer_first_elem(dev->handle);
elem != NULL;
elem = snd_mixer_elem_next(elem))
{
if (!playback) {
if (!snd_mixer_selem_has_capture_volume(elem) &&
!snd_mixer_selem_has_capture_switch(elem) &&
!snd_mixer_selem_has_common_volume(elem)) {
continue;
}
}
else {
if (!snd_mixer_selem_has_playback_volume(elem) &&
!snd_mixer_selem_has_playback_switch(elem) &&
!snd_mixer_selem_has_common_volume(elem)) {
continue;
}
}
dev->numselems++;
}
dev->selems = calloc(dev->numselems, sizeof(PxSelem));
if (dev->selems == NULL) {
break;
}
i = 0;
for (elem = snd_mixer_first_elem(dev->handle);
elem != NULL;
elem = snd_mixer_elem_next(elem))
{
if (!playback) {
if (!snd_mixer_selem_has_capture_volume(elem) &&
!snd_mixer_selem_has_capture_switch(elem) &&
!snd_mixer_selem_has_common_volume(elem)) {
continue;
}
}
else {
if (!snd_mixer_selem_has_playback_volume(elem) &&
!snd_mixer_selem_has_playback_switch(elem) &&
!snd_mixer_selem_has_common_volume(elem)) {
continue;
}
}
if (snd_mixer_selem_id_malloc(&dev->selems[i].sid) < 0) {
break;
}
snd_mixer_selem_get_id(elem, dev->selems[i].sid);
dev->selems[i].elem = elem;
snprintf(name,
sizeof(name),
"%s:%d",
snd_mixer_selem_id_get_name(dev->selems[i].sid),
snd_mixer_selem_id_get_index(dev->selems[i].sid));
dev->selems[i].name = strdup(name);
if (!dev->selems[i].name) {
break;
}
i++;
}
if (i == dev->numselems) {
return TRUE;
}
} while (FALSE);
if (dev->selems) {
for (i = 0; i < dev->numselems; i++) {
if (dev->selems[i].sid) {
snd_mixer_selem_id_free(dev->selems[i].sid);
}
if (dev->selems[i].name) {
free(dev->selems[i].name);
}
}
free(dev->selems);
dev->selems = NULL;
}
if (dev->handle) {
snd_mixer_close(dev->handle);
dev->handle = NULL;
}
return FALSE;
}