static int elem_get_vol_percent(snd_mixer_elem_t *elem)
{
int i, percent;
long pmin, pmax, volume;
for (i = 0; i <= SND_MIXER_SCHN_LAST; i++) {
/* playback volume */
if (snd_mixer_selem_has_playback_channel(elem, i) &&
!snd_mixer_selem_has_common_volume(elem)) {
snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
if (snd_mixer_selem_has_playback_volume(elem))
snd_mixer_selem_get_playback_volume(elem, i, &volume);
}
/* capture volume */
else if (snd_mixer_selem_has_capture_channel(elem, i) &&
!snd_mixer_selem_has_common_volume(elem)) {
snd_mixer_selem_get_capture_volume_range(elem, &pmin, &pmax);
if (snd_mixer_selem_has_capture_volume(elem))
snd_mixer_selem_get_capture_volume(elem, i, &volume);
} else {
/* Misc. ex: Boost */
snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
snd_mixer_selem_get_playback_volume(elem, i, &volume);
}
}
percent = (int) ((double)(volume - pmin) / (double)(pmax - pmin) * 100);
return percent;
}
static void elem_set_vol_percent(snd_mixer_elem_t *elem, int vol_percent)
{
int i;
long pmin, pmax, value;
//sdbg("%s: set mixer element volume\n", __func__);
for (i = 0; i <= SND_MIXER_SCHN_LAST; i++) {
if (snd_mixer_selem_has_playback_channel(elem, i) &&
!snd_mixer_selem_has_common_volume(elem)) {
snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
/* playback volume */
if (snd_mixer_selem_has_playback_volume(elem)) {
value = (int)rint((double)pmin + 0.01 * vol_percent * ((double)pmax - (double)pmin));
snd_mixer_selem_set_playback_volume(elem, i, value);
}
} else if (snd_mixer_selem_has_capture_channel(elem, i) &&
!snd_mixer_selem_has_common_volume(elem)) {
/* capture volume */
snd_mixer_selem_get_capture_volume_range(elem, &pmin, &pmax);
if (snd_mixer_selem_has_capture_volume(elem)) {
value = (int)rint((double)pmin + 0.01 * vol_percent * ((double)pmax - (double)pmin));
snd_mixer_selem_set_capture_volume(elem, i, value);
}
} else {
/* Misc. ex: Boost */
snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
value = (int)rint((double)pmin + 0.01 * vol_percent * ((double)pmax - (double)pmin));
snd_mixer_selem_set_playback_volume(elem, i, value);
snd_mixer_selem_get_capture_volume_range(elem, &pmin, &pmax);
value = (int)rint((double)pmin + 0.01 * vol_percent * ((double)pmax - (double)pmin));
snd_mixer_selem_set_capture_volume(elem, i, value);
}
}
}
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);
}
/*
* Class: org_tritonus_lowlevel_alsa_AlsaMixerElement
* Method: hasCommonVolume
* Signature: ()Z
*/
JNIEXPORT jboolean JNICALL
Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_hasCommonVolume
(JNIEnv* env, jobject obj)
{
snd_mixer_elem_t* handle;
int nReturn;
if (debug_flag) {
(void) fprintf(debug_file, "Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_hasCommonVolume(): begin\n");
}
handle = getHandle(env, obj);
nReturn = snd_mixer_selem_has_common_volume(handle);
if (debug_flag) {
(void) fprintf(debug_file, "Java_org_tritonus_lowlevel_alsa_AlsaMixerElement_hasCommonVolume(): end\n");
}
return (jboolean) nReturn;
}
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;
}
