static int alsa_mixer_set_muted(snd_mixer_elem_t *elem, gboolean muted) {
long val, min, max;
/**if switch is available, get switch status directly*/
if(snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_set_playback_switch(elem, 0, !muted);
snd_mixer_selem_set_playback_switch(elem, 1, !muted);
return 0;
} else if(snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_set_capture_switch(elem, 0, !muted);
snd_mixer_selem_set_capture_switch(elem, 1, !muted);
return 0;
}
if(snd_mixer_selem_has_playback_volume(elem)) {
snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
val = muted ? min : max;
snd_mixer_selem_set_playback_volume(elem, 0, val);
snd_mixer_selem_set_playback_volume(elem, 1, val);
return 0;
} else if(snd_mixer_selem_has_capture_volume(elem)) {
snd_mixer_selem_get_capture_volume_range(elem, &min, &max);
val = muted ? min : max;
snd_mixer_selem_set_capture_volume(elem, 0, val);
snd_mixer_selem_set_capture_volume(elem, 1, val);
return 0;
}
return -1;
}
static int get_current_input_source(px_mixer *Px)
{
PxInfo *info = (PxInfo *)Px->info;
snd_mixer_elem_t *elem;
int sw;
int i, j;
if (!info->capture.handle) {
return -1;
}
for (i = 0; i < info->capture.numselems; i++) {
elem = info->capture.selems[i].elem;
for (j = 0; j <= SND_MIXER_SCHN_LAST; j++) {
if (snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, j, &sw);
if (sw) {
return i;
}
}
}
}
return -1; /* none */
}
void
gam_app_update_visibility (GamApp *gam_app, GtkWidget *widget,
snd_mixer_elem_t *elem, gboolean saved_state){
g_return_if_fail (GAM_IS_APP (gam_app));
GamMixer *gam_mixer=gam_app_get_current_mixer(gam_app);
int is_playback= snd_mixer_selem_has_playback_volume(elem)
|| snd_mixer_selem_has_playback_switch(elem)
|| (snd_mixer_selem_is_enumerated(elem)
&& snd_mixer_selem_is_enum_playback(elem));
int is_capture = snd_mixer_selem_has_capture_volume(elem)
|| snd_mixer_selem_has_capture_switch(elem)
|| (snd_mixer_selem_is_enumerated(elem)
&& snd_mixer_selem_is_enum_capture(elem));
//If nothing showed set show all
if(!(gam_mixer_get_show_playback_elements(gam_mixer)||gam_mixer_get_show_capture_elements(gam_mixer)))
gam_mixer_set_capture_playback(gam_app_get_current_mixer(gam_app), TRUE, TRUE);
if(saved_state
&& ((is_playback && gam_mixer_get_show_playback_elements(gam_mixer))
|| (is_capture && gam_mixer_get_show_capture_elements(gam_mixer))))
gtk_widget_show(widget);
else
gtk_widget_hide(widget);
}
static gboolean alsa_mixer_is_muted(snd_mixer_elem_t *elem, gboolean *need_reset) {
int sw;
long Rvol, Lvol, min, max;
if(need_reset)
*need_reset = FALSE;
/**if switch is available, get switch status directly*/
if(snd_mixer_selem_has_playback_switch(elem)) {
snd_mixer_selem_get_playback_switch(elem, 0, &sw);
return sw ? FALSE: TRUE;
} else if(snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_get_capture_switch(elem, 0, &sw);
return sw ? FALSE: TRUE;
}
if(snd_mixer_selem_has_playback_volume(elem)) {
snd_mixer_selem_get_playback_volume(elem, 0, &Rvol);
snd_mixer_selem_get_playback_volume(elem, 1, &Lvol);
snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
if(need_reset)
*need_reset = !!(max - Rvol);
return (Rvol + Lvol) ? FALSE: TRUE;
} else if(snd_mixer_selem_has_capture_volume(elem)) {
snd_mixer_selem_get_capture_volume_range(elem, &min, &max);
snd_mixer_selem_get_capture_volume(elem, 0, &Rvol);
snd_mixer_selem_get_capture_volume(elem, 1, &Lvol);
if(need_reset)
*need_reset = !!(max - Rvol);
return (Rvol + Lvol) ? FALSE: TRUE;
}
}
void
gam_toggle_set_state (GamToggle *gam_toggle, gboolean state)
{
GamTogglePrivate *priv;
const gboolean internal_state = gam_toggle_get_state (gam_toggle);
int err;
priv = GAM_TOGGLE_GET_PRIVATE (gam_toggle);
if (state == internal_state) return;
if (snd_mixer_selem_has_playback_switch (priv->elem)) {
err = snd_mixer_selem_set_playback_switch_all (priv->elem, state);
} else if (snd_mixer_selem_has_capture_switch (priv->elem)) {
err = snd_mixer_selem_set_capture_switch_all (priv->elem, state);
} else {
g_warning ("%s (). No idea what to do for mixer element \"%s\"!",
__FUNCTION__, snd_mixer_selem_get_name (priv->elem));
err = 0;
}
if (err)
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (gam_toggle),
internal_state);
}
static void
gst_alsa_mixer_track_update_alsa_capabilities (GstAlsaMixerTrack * alsa_track)
{
alsa_track->alsa_flags = 0;
alsa_track->capture_group = -1;
if (snd_mixer_selem_has_common_volume (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_VOLUME;
if (snd_mixer_selem_has_playback_volume (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_PVOLUME;
if (snd_mixer_selem_has_capture_volume (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CVOLUME;
if (snd_mixer_selem_has_common_switch (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_SWITCH;
if (snd_mixer_selem_has_playback_switch (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_PSWITCH;
if (snd_mixer_selem_has_capture_switch (alsa_track->element)) {
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CSWITCH;
if (snd_mixer_selem_has_capture_switch_exclusive (alsa_track->element)) {
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CSWITCH_EXCL;
alsa_track->capture_group =
snd_mixer_selem_get_capture_group (alsa_track->element);
}
}
GST_LOG ("[%s] alsa_flags=0x%08x, capture_group=%d",
snd_mixer_selem_get_name (alsa_track->element),
alsa_track->alsa_flags, alsa_track->capture_group);
}
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 ;
}
static int elem_get_status(snd_mixer_elem_t *elem)
{
int i, psw = -1;
for (i = 0; i <= SND_MIXER_SCHN_LAST; i++) {
if (snd_mixer_selem_has_playback_channel(elem, i) &&
snd_mixer_selem_has_playback_switch(elem))
snd_mixer_selem_get_playback_switch(elem, i, &psw);
else if (snd_mixer_selem_has_capture_channel(elem, i) &&
snd_mixer_selem_has_capture_switch(elem))
snd_mixer_selem_get_capture_switch(elem, i, &psw);
}
return psw;
}
/*
* Class: org_tritonus_lowlevel_alsa_AlsaMixerElement
* Method: hasCaptureSwitch
* Signature: ()Z
*/
JNIEXPORT jboolean JNICALL
Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_hasCaptureSwitch
(JNIEnv* env, jobject obj)
{
snd_mixer_elem_t* handle;
int nReturn;
if (debug_flag) {
(void) fprintf(debug_file, "Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_hasCaptureSwitch(): begin\n");
}
handle = getHandle(env, obj);
nReturn = snd_mixer_selem_has_capture_switch(handle);
if (debug_flag) {
(void) fprintf(debug_file, "Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_hasCaptureSwitch(): end\n");
}
return (jboolean) nReturn;
}
bool AlsaMixer::GetChannelSwitch( const char* channel, bool* on )
{
bool success = false;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *sid;
snd_mixer_selem_id_alloca(&sid);
snd_mixer_selem_id_set_index( sid, 0);
snd_mixer_selem_id_set_name( sid, channel);
elem = snd_mixer_find_selem(_handle, sid);
if (!elem) {
LOG( Logger::LOG_ERROR, "Unable to find simple control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
goto end;
}
if( snd_mixer_selem_has_playback_switch(elem) )
{
for (int chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++) {
int value;
if (snd_mixer_selem_get_playback_switch(elem, (snd_mixer_selem_channel_id_t)chn, &value) >= 0)
{
*on = value != 0;
success = true;
break;
}
}
}else if( snd_mixer_selem_has_capture_switch(elem) )
{
for (int chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++) {
int value;
if (snd_mixer_selem_get_capture_switch(elem, (snd_mixer_selem_channel_id_t)chn, &value ) >= 0)
{
*on = value != 0;
success = true;
break;
}
}
}
if( !success )
{
LOG( Logger::LOG_ERROR, "Error getting control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
}
end:
return success;
}
gboolean
gam_toggle_get_state (GamToggle *gam_toggle)
{
GamTogglePrivate *priv;
gint value = 0;
priv = GAM_TOGGLE_GET_PRIVATE (gam_toggle);
if (snd_mixer_selem_has_playback_switch (priv->elem)) {
snd_mixer_selem_get_playback_switch (priv->elem, 0, &value);
} else if (snd_mixer_selem_has_capture_switch (priv->elem)) {
snd_mixer_selem_get_capture_switch (priv->elem, 0, &value);
} else {
g_warning ("%s (). No idea what to do for mixer element \"%s\"!",
__FUNCTION__, snd_mixer_selem_get_name (priv->elem));
}
return value;
}
/* mute: 0 -> mute, 1 -> unmute */
void sound_mixer_mute(const char *mixer, MUTEST mute)
{
int i;
snd_mixer_t *handle = NULL;
snd_mixer_elem_t *elem = NULL;
elem = sound_get_elem(mixer, &handle);
if (!elem)
return;
for (i = 0; i <= SND_MIXER_SCHN_LAST; i++) {
if (snd_mixer_selem_has_playback_channel(elem, i) &&
snd_mixer_selem_has_playback_switch(elem))
snd_mixer_selem_set_playback_switch(elem, i, mute);
else if (snd_mixer_selem_has_capture_channel(elem, i) &&
snd_mixer_selem_has_capture_switch(elem))
snd_mixer_selem_set_capture_switch(elem, i, mute);
}
snd_mixer_close(handle);
}
static void set_current_input_source(px_mixer *Px, int i)
{
PxInfo *info = (PxInfo *)Px->info;
snd_mixer_elem_t *elem;
int j;
if (!info->capture.handle) {
return;
}
if (i < 0 || i >= info->capture.numselems) {
return;
}
elem = info->capture.selems[i].elem;
for (j = 0; j <= SND_MIXER_SCHN_LAST; j++) {
if (snd_mixer_selem_has_capture_switch(elem)) {
snd_mixer_selem_set_capture_switch(elem, j, TRUE);
}
}
return;
}
status_t ALSAMixer::setCaptureMuteState(uint32_t device, bool state)
{
for (int j = 0; mixerProp[j][SND_PCM_STREAM_CAPTURE].device; j++)
if (mixerProp[j][SND_PCM_STREAM_CAPTURE].device & device) {
mixer_info_t *info = mixerProp[j][SND_PCM_STREAM_CAPTURE].mInfo;
if (!info || !info->elem) return INVALID_OPERATION;
if (snd_mixer_selem_has_capture_switch (info->elem)) {
int err = snd_mixer_selem_set_capture_switch_all (info->elem, static_cast<int>(!state));
if (err < 0) {
ALOGE("Unable to %s capture mixer switch %s",
state ? "enable" : "disable", info->name);
return INVALID_OPERATION;
}
}
info->mute = state;
}
return NO_ERROR;
}
static int alsa_mixer_init(alsa_mixer_t *mixer, char *card) {
snd_mixer_selem_id_t *sid;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_alloca(&sid);
int err;
if ((err = snd_mixer_open(&mixer->handle, 0)) < 0) {
DEBUG("Mixer %s open error: %s", card, snd_strerror(err));
mixer->handle = NULL;
return err;
}
if ((err = snd_mixer_attach(mixer->handle, card)) < 0) {
DEBUG("Mixer %s local error: %s\n", card, snd_strerror(err));
snd_mixer_close(mixer->handle);
mixer->handle = NULL;
return err;
}
if ((err = snd_mixer_selem_register(mixer->handle, NULL, NULL)) < 0) {
DEBUG("Mixer register error: %s", snd_strerror(err));
snd_mixer_close(mixer->handle);
return err;
}
snd_mixer_set_callback(mixer->handle, on_mixer_event);
err = snd_mixer_load(mixer->handle);
if (err < 0) {
DEBUG("Mixer %s load error: %s", card, snd_strerror(err));
snd_mixer_close(mixer->handle);
return err;
}
for (elem = snd_mixer_first_elem(mixer->handle); elem; elem = snd_mixer_elem_next(elem)) {
const char *name = NULL;
snd_mixer_selem_get_id(elem, sid);
if (!snd_mixer_selem_is_active(elem))
continue;
name = snd_mixer_selem_id_get_name(sid);
if(snd_mixer_selem_has_playback_volume(elem)) {
if(strcmp(name, "Master") == 0)
mixer->master = elem;
else if(strcmp(name, "PCM") == 0)
mixer->pcm = elem;
} else if(snd_mixer_selem_has_capture_volume(elem) || snd_mixer_selem_has_capture_switch(elem)) {
DEBUG("capture elem name = %s\n", name);
/**make sure have one capture source if capture is available*/
if(NULL == mixer->mic) {
mixer->mic = elem;
}
/**if have Microphone, replace it*/
if(strcmp(name, "Microphone") == 0)
mixer->mic = elem;
if(strcmp(name, "Capture") == 0)
mixer->mic = elem;
}
}
DEBUG("master = %x, pcm = %x, microphone = %x\n", mixer->master, mixer->pcm, mixer->mic);
return 0;
}
MixerElem *lamixer_volelem_new(snd_mixer_elem_t *elem)
{
MixerElem *mixer_elem;
guint voltype=0, elemidx=0, mono;
long minrange=0,maxrange=0,rangevalue_left=0,rangevalue_right=0;
const char* selem_name = NULL;
char elem_name[64];
mixer_elem = g_malloc(sizeof(MixerElem));
mixer_elem->elem = elem;
mixer_elem->playback = NULL;
mixer_elem->capture = NULL;
mixer_elem->pswitch = NULL;
mixer_elem->cswitch = NULL;
mixer_elem->penum = NULL;
mixer_elem->cenum = NULL;
elemidx = snd_mixer_selem_get_index(elem);
selem_name = snd_mixer_selem_id_get_name(sid);
strcpy(elem_name, selem_name);
if(elemidx > 0) {
sprintf(elem_name,"%s %i",elem_name, elemidx);
}
if (!snd_mixer_selem_is_enumerated(elem)) {
if (snd_mixer_selem_has_playback_volume(elem)) {
voltype = 1;
snd_mixer_selem_get_playback_volume_range (elem, &minrange, &maxrange);
mono = snd_mixer_selem_is_playback_mono(elem);
snd_mixer_selem_get_playback_volume (elem, SND_MIXER_SCHN_FRONT_LEFT, &rangevalue_left);
if(!mono)
snd_mixer_selem_get_playback_volume (elem, SND_MIXER_SCHN_FRONT_RIGHT, &rangevalue_right);
mixer_elem->playback = lamixer_volbox_new(elem_name,mono, \
(snd_mixer_selem_has_playback_switch(elem) || snd_mixer_selem_has_playback_switch_joined(elem)), minrange, maxrange, elem, voltype);
}
else if (snd_mixer_selem_has_playback_switch(elem)) {
voltype = 1;
mixer_elem->pswitch = lamixer_switchbox_add(elem_name, elem, voltype);
}
if (snd_mixer_selem_has_capture_volume(elem)) {
voltype = 2;
snd_mixer_selem_get_capture_volume_range (elem, &minrange, &maxrange);
mono = snd_mixer_selem_is_capture_mono(elem);
snd_mixer_selem_get_capture_volume (elem, SND_MIXER_SCHN_FRONT_LEFT, &rangevalue_left);
if(!mono)
snd_mixer_selem_get_capture_volume (elem, SND_MIXER_SCHN_FRONT_RIGHT, &rangevalue_right);
mixer_elem->capture = lamixer_volbox_new(elem_name,mono, \
(snd_mixer_selem_has_capture_switch(elem) || snd_mixer_selem_has_capture_switch_joined(elem)), minrange, maxrange, elem, voltype);
}
else if (snd_mixer_selem_has_capture_switch(elem)) {
voltype = 2;
mixer_elem->cswitch = lamixer_switchbox_add(elem_name, elem, voltype);
}
}
else {
if (snd_mixer_selem_is_enum_playback(elem)) {
voltype = 1;
mixer_elem->penum = lamixer_enumbox_add(elem_name, elem, voltype);
}
else if (snd_mixer_selem_is_enum_capture(elem)) {
voltype = 2;
mixer_elem->cenum = lamixer_enumbox_add(elem_name, elem, voltype);
}
}
return mixer_elem;
}
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);
}
void PORT_GetControls(void* id, INT32 portIndex, PortControlCreator* creator) {
PortMixer* portMixer;
snd_mixer_elem_t* elem;
void* control;
PortControl* portControl;
void* controls[10];
int numControls;
char* portName;
int isPlayback = 0;
int isMono;
int isStereo;
char* type;
snd_mixer_selem_channel_id_t channel;
TRACE0("> PORT_GetControls\n");
if (id == NULL) {
ERROR0("Invalid handle!");
// $$mp: an error code should be returned.
return;
}
portMixer = (PortMixer*) id;
if (portIndex < 0 || portIndex >= portMixer->numElems) {
ERROR0("Port index out of range!");
// $$mp: an error code should be returned.
return;
}
numControls = 0;
elem = portMixer->elems[portIndex];
if (snd_mixer_selem_has_playback_volume(elem) || snd_mixer_selem_has_capture_volume(elem)) {
/* Since we've split/duplicated elements with both playback and capture on the recovery
of elements, we now can assume that we handle only to deal with either playback or
capture. */
isPlayback = isPlaybackFunction(portMixer->types[portIndex]);
isMono = (isPlayback && snd_mixer_selem_is_playback_mono(elem)) ||
(!isPlayback && snd_mixer_selem_is_capture_mono(elem));
isStereo = (isPlayback &&
snd_mixer_selem_has_playback_channel(elem, SND_MIXER_SCHN_FRONT_LEFT) &&
snd_mixer_selem_has_playback_channel(elem, SND_MIXER_SCHN_FRONT_RIGHT)) ||
(!isPlayback &&
snd_mixer_selem_has_capture_channel(elem, SND_MIXER_SCHN_FRONT_LEFT) &&
snd_mixer_selem_has_capture_channel(elem, SND_MIXER_SCHN_FRONT_RIGHT));
// single volume control
if (isMono || isStereo) {
if (getControlSlot(portMixer, &portControl)) {
portControl->elem = elem;
portControl->portType = portMixer->types[portIndex];
portControl->controlType = CONTROL_TYPE_VOLUME;
if (isMono) {
portControl->channel = CHANNELS_MONO;
} else {
portControl->channel = CHANNELS_STEREO;
}
control = createVolumeControl(creator, portControl, elem, isPlayback);
if (control != NULL) {
controls[numControls++] = control;
}
}
} else { // more than two channels, each channels has its own control.
for (channel = SND_MIXER_SCHN_FRONT_LEFT; channel <= SND_MIXER_SCHN_LAST; channel++) {
if ((isPlayback && snd_mixer_selem_has_playback_channel(elem, channel)) ||
(!isPlayback && snd_mixer_selem_has_capture_channel(elem, channel))) {
if (getControlSlot(portMixer, &portControl)) {
portControl->elem = elem;
portControl->portType = portMixer->types[portIndex];
portControl->controlType = CONTROL_TYPE_VOLUME;
portControl->channel = channel;
control = createVolumeControl(creator, portControl, elem, isPlayback);
// We wrap in a compound control to provide the channel name.
if (control != NULL) {
/* $$mp 2003-09-14: The following cast shouln't be necessary. Instead, the
declaration of PORT_NewCompoundControlPtr in Ports.h should be changed
to take a const char* parameter. */
control = (creator->newCompoundControl)(creator, (char*) snd_mixer_selem_channel_name(channel), &control, 1);
}
if (control != NULL) {
controls[numControls++] = control;
}
}
}
}
}
// BALANCE control
if (isStereo) {
if (getControlSlot(portMixer, &portControl)) {
portControl->elem = elem;
portControl->portType = portMixer->types[portIndex];
portControl->controlType = CONTROL_TYPE_BALANCE;
portControl->channel = CHANNELS_STEREO;
/* $$mp: The value for precision is chosen more or less arbitrarily. */
control = (creator->newFloatControl)(creator, portControl, CONTROL_TYPE_BALANCE, -1.0F, 1.0F, 0.01F, "");
if (control != NULL) {
controls[numControls++] = control;
}
}
}
}
if (snd_mixer_selem_has_playback_switch(elem) || snd_mixer_selem_has_capture_switch(elem)) {
if (getControlSlot(portMixer, &portControl)) {
type = isPlayback ? CONTROL_TYPE_MUTE : CONTROL_TYPE_SELECT;
portControl->elem = elem;
portControl->portType = portMixer->types[portIndex];
portControl->controlType = type;
control = (creator->newBooleanControl)(creator, portControl, type);
if (control != NULL) {
controls[numControls++] = control;
}
}
}
/* $$mp 2003-09-14: The following cast shouln't be necessary. Instead, the
declaration of PORT_NewCompoundControlPtr in Ports.h should be changed
to take a const char* parameter. */
portName = (char*) snd_mixer_selem_get_name(elem);
control = (creator->newCompoundControl)(creator, portName, controls, numControls);
if (control != NULL) {
(creator->addControl)(creator, control);
}
TRACE0("< PORT_GetControls\n");
}
static int _has_switch(snd_mixer_elem_t *elem, int playback)
{
return playback ?
snd_mixer_selem_has_playback_switch(elem) :
snd_mixer_selem_has_capture_switch(elem);
}
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;
}
