void asound_set_channel(const gchar * channel)
{
if(m_mixer == NULL || channel == NULL) {
return;
}
if(g_strcmp0(channel, m_channel) == 0)
return;
// Clean up any previously set channels
g_free(m_channel);
m_channel = g_strdup(channel);
if(m_elem)
{
snd_mixer_elem_set_callback(m_elem, NULL);
m_elem = NULL;
}
// Setup m_elem using the provided channelname
snd_mixer_selem_id_t * sid;
snd_mixer_selem_id_malloc(&sid);
snd_mixer_selem_id_set_name(sid, channel);
m_elem = snd_mixer_find_selem(m_mixer, sid);
if(m_elem != NULL)
{
snd_mixer_elem_set_callback(m_elem, asound_elem_event);
snd_mixer_selem_id_free(sid);
}
}
void lamixer_mixerelem_show(MixerElem *mixer_elem)
{
if(mixer_elem->playback != NULL)
lamixer_volbox_show(mixer_elem->playback, mixer_elem->elem, mixerbox);
if(mixer_elem->capture != NULL)
lamixer_volbox_show(mixer_elem->capture, mixer_elem->elem, capturebox);
if(mixer_elem->pswitch != NULL)
lamixer_switchbox_show(mixer_elem->pswitch, switchvbox);
if(mixer_elem->cswitch != NULL)
lamixer_switchbox_show(mixer_elem->cswitch, switchcapturevbox);
if(mixer_elem->penum != NULL)
lamixer_enumbox_show(mixer_elem->penum, enumvbox);
if(mixer_elem->cenum != NULL)
lamixer_enumbox_show(mixer_elem->cenum, enumcapturevbox);
if(mixer_elem->playback != NULL || mixer_elem->capture != NULL) {
snd_mixer_elem_set_callback(mixer_elem->elem, lamixer_volbox_change);
snd_mixer_elem_set_callback_private(mixer_elem->elem, mixer_elem);
}
}
static int mixer_callback(snd_mixer_t *mixer, unsigned int mask, snd_mixer_elem_t *elem)
{
if (mask & SND_CTL_EVENT_MASK_ADD) {
snd_mixer_elem_set_callback(elem, elem_callback);
controls_changed = TRUE;
}
return 0;
}
void lamixer_enumbox_show(EnumBox *enumbox, GtkWidget *enumvbox)
{
guint evalue;
snd_mixer_selem_get_enum_item(enumbox->volelem, SND_MIXER_SCHN_FRONT_LEFT, &evalue);
gtk_combo_box_set_active(GTK_COMBO_BOX(enumbox->enumswitch), evalue);
gtk_box_pack_start(GTK_BOX(enumvbox), enumbox->enumhbox, TRUE, FALSE, 0);
g_signal_connect(G_OBJECT(enumbox->enumswitch), "changed", G_CALLBACK(lamixer_enumbox_changed), enumbox->volelem);
snd_mixer_elem_set_callback(enumbox->volelem, lamixer_enumbox_change);
snd_mixer_elem_set_callback_private(enumbox->volelem, enumbox);
}
static int on_mixer_event(snd_mixer_t *handle, unsigned int mask, snd_mixer_elem_t *elem) {
snd_mixer_selem_id_t *sid;
if(mask & SND_CTL_EVENT_MASK_ADD) {
snd_mixer_selem_id_alloca(&sid);
snd_mixer_selem_get_id(elem, sid);
DEBUG("set callback for mixer control = %s\n", snd_mixer_selem_id_get_name(sid));
snd_mixer_elem_set_callback(elem, on_mixer_elem_event);
}
return 0;
}
void
gam_toggle_set_elem (GamToggle *gam_toggle, snd_mixer_elem_t *elem)
{
GamTogglePrivate *priv;
g_return_if_fail (GAM_IS_TOGGLE (gam_toggle));
priv = GAM_TOGGLE_GET_PRIVATE (gam_toggle);
if (priv->elem)
snd_mixer_elem_set_callback (priv->elem, NULL);
if (elem) {
snd_mixer_elem_set_callback_private (elem, gam_toggle);
snd_mixer_elem_set_callback (elem, gam_toggle_refresh);
}
priv->elem = elem;
g_object_notify (G_OBJECT (gam_toggle), "elem");
}
void lamixer_switchbox_show(SwitchBox *swbox, GtkWidget *swvbox)
{
int swstat;
snd_mixer_selem_get_playback_switch (swbox->volelem, SND_MIXER_SCHN_FRONT_LEFT, &swstat);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(swbox->volswitch), swstat);
swbox->hswsignalid = g_signal_connect(G_OBJECT(swbox->volswitch), "toggled", G_CALLBACK(lamixer_volswitch_changed), swbox->volelem);
gtk_box_pack_start(GTK_BOX(swvbox), swbox->volswitch, TRUE, TRUE, 0);
snd_mixer_elem_set_callback(swbox->volelem, lamixer_switchbox_change);
snd_mixer_elem_set_callback_private(swbox->volelem, swbox);
}
static void
attach_mixer (MokoAlsaVolumeControl *self)
{
MokoAlsaVolumeControlPrivate *priv = ALSA_VOLUME_CONTROL_PRIVATE (self);
g_debug ("Trying to attach... %p, %s, %p", priv->mixer_handle,
priv->device, priv->element);
open_mixer (self);
if (priv->mixer_handle && priv->device && priv->element &&
(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)) {
priv->mixer_elem = snd_mixer_find_selem (
priv->mixer_handle, priv->element);
if (!priv->mixer_elem) {
g_warning ("Unable to find mixer element");
snd_mixer_detach (priv->mixer_handle, priv->device);
close_mixer (self);
} else {
g_debug ("Attached to mixer");
if (snd_mixer_selem_has_playback_volume (
priv->mixer_elem)) {
priv->control_type = PLAYBACK;
snd_mixer_selem_get_playback_volume_range (
priv->mixer_elem,
&priv->min, &priv->max);
} else if (snd_mixer_selem_has_capture_volume (
priv->mixer_elem)) {
priv->control_type = CAPTURE;
snd_mixer_selem_get_capture_volume_range (
priv->mixer_elem,
&priv->min, &priv->max);
} else
priv->control_type = CONTROL;
snd_mixer_elem_set_callback (
priv->mixer_elem, mixer_elem_event_cb);
snd_mixer_elem_set_callback_private (
priv->mixer_elem, self);
start_polling (self);
update_volume (self);
}
} else {
close_mixer (self);
}
}
static gint
_j4status_alsa_section_mixer_callback(snd_mixer_t *mixer, guint mask, snd_mixer_elem_t *elem)
{
J4statusAlsaSection *section = snd_mixer_get_callback_private(mixer);
if ( mask & SND_CTL_EVENT_MASK_ADD )
{
if ( ( snd_mixer_selem_get_index(elem) == 0 )
&& ( g_strcmp0(snd_mixer_selem_get_name(elem), "Master") == 0 )
&& snd_mixer_selem_has_playback_channel(elem, SND_MIXER_SCHN_FRONT_LEFT)
&& ( snd_mixer_elem_get_callback_private(elem) == NULL )
)
{
snd_mixer_elem_set_callback(elem, _j4status_alsa_section_elem_callback);
snd_mixer_elem_set_callback_private(elem, section);
}
}
return 0;
}
static void
gam_toggle_finalize (GObject *object)
{
GamToggle *gam_toggle;
GamTogglePrivate *priv;
g_return_if_fail (GAM_IS_TOGGLE (object));
gam_toggle = GAM_TOGGLE (object);
priv = GAM_TOGGLE_GET_PRIVATE (gam_toggle);
snd_mixer_elem_set_callback (priv->elem, NULL);
g_free (priv->name_config);
priv->name_config = NULL;
priv->elem = NULL;
priv->mixer = NULL;
priv->app = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
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);
}
/**
* Initializes the alsa system by getting the cards
* and channels and setting the io watch for external
* volume changes.
*
* @return 0 on success otherwise negative error code
*/
static int
alsaset(void)
{
char *card_name;
char *channel;
// update list of available cards
DEBUG_PRINT("Getting available cards...");
get_cards();
assert(cards != NULL);
// get selected card
assert(active_card == NULL);
card_name = get_selected_card();
DEBUG_PRINT("Selected card: %s", card_name);
if (card_name) {
active_card = find_card(card_name);
g_free(card_name);
}
// if not available, use the default card
if (!active_card) {
DEBUG_PRINT("Using default soundcard");
active_card = cards->data;
}
// If no playable channels, iterate on card list until a valid card is
// found.
// In most situations, the first card of the list (which is the
// Alsa default card) can be opened.
// However, in some situations the default card may be unavailable.
// For example, when it's an USB DAC, and it's disconnected.
if (!active_card->channels) {
GSList *item;
DEBUG_PRINT("Card '%s' has no playable channels, iterating on card list",
active_card->dev);
for (item = cards; item; item = item->next) {
active_card = item->data;
if (active_card->channels)
break;
}
assert(item != NULL);
}
// open card
DEBUG_PRINT("Opening card '%s'...", active_card->dev);
smixer_options.device = active_card->dev;
handle = open_mixer(active_card->dev, &smixer_options, smixer_level);
assert(handle != NULL);
// Set the channel
// We have to handle the fact that the channel name defined
// in PNMixer configuration is not necessarily valid.
// For example, this may happen when the default alsa soundcard
// is modified. The channel names of the new default card may
// not match the channel names of the previous default card.
assert(elem == NULL);
channel = get_selected_channel(active_card->name);
if (channel) {
snd_mixer_selem_id_t *sid;
snd_mixer_selem_id_alloca(&sid);
snd_mixer_selem_id_set_name(sid, channel);
elem = snd_mixer_find_selem(handle, sid);
g_free(channel);
}
if (elem == NULL) {
elem = snd_mixer_first_elem(handle);
}
assert(elem != NULL);
// Set callback
DEBUG_PRINT("Using channel '%s'", snd_mixer_selem_get_name(elem));
snd_mixer_elem_set_callback(elem, alsa_cb);
// set watch for volume changes
set_io_watch(handle);
return 0;
}
void asound_setup(const gchar * card, const gchar * channel,
void (*volume_changed)(int,gboolean))
{
gchar * card_override = NULL; // used to hold a string like hw:0 if a nice
// device name was given as 'card'
// Clean up resources from previous calls to setup
g_free(m_channel);
m_channel = NULL;
if(m_elem) {
snd_mixer_elem_set_callback(m_elem, NULL);
m_elem = NULL;
}
if(m_mixer) {
snd_mixer_close(m_mixer);
m_mixer = NULL;
}
g_list_free_full(m_channel_names, g_free);
m_channel_names = NULL;
g_list_free_full(m_device_names, g_free);
m_device_names = NULL;
// Save card, volume_changed
g_free(m_device);
m_device = g_strdup(card);
m_volume_changed = volume_changed;
// Populate list of device names
int card_number = -1;
int ret = snd_card_next(&card_number);
snd_ctl_card_info_t * info = NULL;
snd_ctl_card_info_alloca(&info);
m_device_names = g_list_append(m_device_names, (gpointer)g_strdup("default"));
while(ret == 0 && card_number != -1) {
char buf[16];
sprintf(buf, "hw:%d", card_number);
snd_ctl_t * ctl = NULL;
if(snd_ctl_open(&ctl, buf, 0) < 0) {
continue;
}
if(snd_ctl_card_info(ctl, info) < 0) {
snd_ctl_close(ctl);
continue;
}
snd_ctl_close(ctl);
gchar * nice_name = g_strdup(snd_ctl_card_info_get_name(info));
m_device_names = g_list_append(m_device_names, (gpointer)nice_name);
if(g_strcmp0(nice_name, m_device) == 0) {
g_free(card_override);
card_override = g_strdup_printf("hw:%d", card_number);
}
ret = snd_card_next(&card_number);
}
// Load the mixer for the provided cardname
snd_mixer_open(&m_mixer, 0);
if(snd_mixer_attach(m_mixer, (card_override != NULL ? card_override : m_device)) < 0) {
fprintf(stderr, "Failed to open sound device with name: %s\n",
(card_override != NULL ? card_override : m_device));
snd_mixer_close(m_mixer);
m_mixer = NULL;
g_free(card_override);
return;
} else {
g_free(card_override);
}
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 | G_IO_ERR , 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);
}
