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/*
* Copyright (C) 2014 Michal Ratajsky <michal.ratajsky@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the licence, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include <glib.h>
#include <glib-object.h>
#include <alsa/asoundlib.h>
#include <libmatemixer/matemixer.h>
#include <libmatemixer/matemixer-private.h>
#include "alsa-element.h"
#include "alsa-stream.h"
#include "alsa-switch-option.h"
#include "alsa-toggle.h"
struct _AlsaTogglePrivate
{
AlsaToggleType type;
guint32 channel_mask;
snd_mixer_elem_t *element;
};
static void alsa_element_interface_init (AlsaElementInterface *iface);
G_DEFINE_TYPE_WITH_CODE (AlsaToggle, alsa_toggle, MATE_MIXER_TYPE_STREAM_TOGGLE,
G_ADD_PRIVATE(AlsaToggle)
G_IMPLEMENT_INTERFACE (ALSA_TYPE_ELEMENT,
alsa_element_interface_init))
static gboolean alsa_toggle_set_active_option (MateMixerSwitch *mms,
MateMixerSwitchOption *mmso);
static snd_mixer_elem_t *alsa_toggle_get_snd_element (AlsaElement *element);
static void alsa_toggle_set_snd_element (AlsaElement *element,
snd_mixer_elem_t *el);
static gboolean alsa_toggle_load (AlsaElement *element);
static void
alsa_element_interface_init (AlsaElementInterface *iface)
{
iface->get_snd_element = alsa_toggle_get_snd_element;
iface->set_snd_element = alsa_toggle_set_snd_element;
iface->load = alsa_toggle_load;
}
static void
alsa_toggle_class_init (AlsaToggleClass *klass)
{
MateMixerSwitchClass *switch_class;
switch_class = MATE_MIXER_SWITCH_CLASS (klass);
switch_class->set_active_option = alsa_toggle_set_active_option;
}
static void
alsa_toggle_init (AlsaToggle *toggle)
{
toggle->priv = alsa_toggle_get_instance_private (toggle);
}
AlsaToggle *
alsa_toggle_new (AlsaStream *stream,
const gchar *name,
const gchar *label,
MateMixerStreamSwitchRole role,
AlsaToggleType type,
AlsaSwitchOption *on,
AlsaSwitchOption *off)
{
AlsaToggle *toggle;
g_return_val_if_fail (ALSA_IS_STREAM (stream), NULL);
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (label != NULL, NULL);
g_return_val_if_fail (ALSA_IS_SWITCH_OPTION (on), NULL);
g_return_val_if_fail (ALSA_IS_SWITCH_OPTION (off), NULL);
toggle = g_object_new (ALSA_TYPE_TOGGLE,
"name", name,
"label", label,
"flags", MATE_MIXER_STREAM_SWITCH_TOGGLE,
"role", role,
"stream", stream,
"on-state-option", on,
"off-state-option", off,
NULL);
toggle->priv->type = type;
return toggle;
}
static gboolean
alsa_toggle_set_active_option (MateMixerSwitch *mms, MateMixerSwitchOption *mmso)
{
AlsaToggle *toggle;
gint value;
gint ret;
g_return_val_if_fail (ALSA_IS_TOGGLE (mms), FALSE);
g_return_val_if_fail (ALSA_IS_SWITCH_OPTION (mmso), FALSE);
toggle = ALSA_TOGGLE (mms);
if (G_UNLIKELY (toggle->priv->element == NULL))
return FALSE;
/* For toggles the 0/1 value is stored as the switch option id, there is not really
* a need to validate that the option belong to the switch, just make sure it
* contains the value 0 or 1 */
value = alsa_switch_option_get_id (ALSA_SWITCH_OPTION (mmso));
if (G_UNLIKELY (value != 0 && value != 1)) {
g_warn_if_reached ();
return FALSE;
}
if (toggle->priv->type == ALSA_TOGGLE_CAPTURE)
ret = snd_mixer_selem_set_capture_switch_all (toggle->priv->element, value);
else
ret = snd_mixer_selem_set_playback_switch_all (toggle->priv->element, value);
if (ret < 0) {
g_warning ("Failed to set value of toggle %s: %s",
snd_mixer_selem_get_name (toggle->priv->element),
snd_strerror (ret));
return FALSE;
}
return TRUE;
}
static snd_mixer_elem_t *
alsa_toggle_get_snd_element (AlsaElement *element)
{
g_return_val_if_fail (ALSA_IS_TOGGLE (element), NULL);
return ALSA_TOGGLE (element)->priv->element;
}
static void
alsa_toggle_set_snd_element (AlsaElement *element, snd_mixer_elem_t *el)
{
g_return_if_fail (ALSA_IS_TOGGLE (element));
ALSA_TOGGLE (element)->priv->element = el;
}
static gboolean
alsa_toggle_load (AlsaElement *element)
{
AlsaToggle *toggle;
gint value;
gint ret;
snd_mixer_selem_channel_id_t c;
g_return_val_if_fail (ALSA_IS_TOGGLE (element), FALSE);
toggle = ALSA_TOGGLE (element);
if (G_UNLIKELY (toggle->priv->element == NULL))
return FALSE;
/* When reading the first time we try all the channels, otherwise only the
* ones which returned success before */
if (toggle->priv->channel_mask == 0) {
for (c = 0; c < SND_MIXER_SCHN_LAST; c++) {
if (toggle->priv->type == ALSA_TOGGLE_CAPTURE)
ret = snd_mixer_selem_get_capture_switch (toggle->priv->element,
c,
&value);
else
ret = snd_mixer_selem_get_playback_switch (toggle->priv->element,
c,
&value);
/* The active enum option is set per-channel, so when reading it the
* first time, create a mask of all channels for which we read the
* value successfully */
if (ret == 0)
toggle->priv->channel_mask |= 1 << c;
}
/* The last ALSA call might have failed, but it doesn't matter if we have
* a channel mask */
if (toggle->priv->channel_mask > 0)
ret = 0;
} else {
for (c = 0; !(toggle->priv->channel_mask & (1 << c)); c++)
;
/* When not reading the mask, the first usable channel is enough, we don't
* support per-channel selections anyway */
if (toggle->priv->type == ALSA_TOGGLE_CAPTURE)
ret = snd_mixer_selem_get_capture_switch (toggle->priv->element,
c,
&value);
else
ret = snd_mixer_selem_get_playback_switch (toggle->priv->element,
c,
&value);
}
if (ret == 0) {
MateMixerSwitchOption *active;
if (value > 0)
active = mate_mixer_stream_toggle_get_state_option (MATE_MIXER_STREAM_TOGGLE (toggle),
TRUE);
else
active = mate_mixer_stream_toggle_get_state_option (MATE_MIXER_STREAM_TOGGLE (toggle),
FALSE);
_mate_mixer_switch_set_active_option (MATE_MIXER_SWITCH (toggle), active);
return TRUE;
}
g_warning ("Failed to read state of toggle %s: %s",
snd_mixer_selem_get_name (toggle->priv->element),
snd_strerror (ret));
return FALSE;
}
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