1 files changed, 219 insertions, 0 deletions
diff --git a/backends/alsa/alsa-toggle.c b/backends/alsa/alsa-toggle.c
new file mode 100644
index 0000000..efa3460
--- /dev/null
+++ b/backends/alsa/alsa-toggle.c
@@ -0,0 +1,219 @@
+/*
+ * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ *
+ * 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-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);
+
+static void alsa_toggle_class_init (AlsaToggleClass *klass);
+static void alsa_toggle_init (AlsaToggle *toggle);
+
+G_DEFINE_TYPE_WITH_CODE (AlsaToggle, alsa_toggle, MATE_MIXER_TYPE_TOGGLE,
+ 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;
+
+ g_type_class_add_private (G_OBJECT_CLASS (klass), sizeof (AlsaTogglePrivate));
+}
+
+static void
+alsa_toggle_init (AlsaToggle *toggle)
+{
+ toggle->priv = G_TYPE_INSTANCE_GET_PRIVATE (toggle,
+ ALSA_TYPE_TOGGLE,
+ AlsaTogglePrivate);
+}
+
+AlsaToggle *
+alsa_toggle_new (const gchar *name,
+ const gchar *label,
+ AlsaToggleType type,
+ AlsaSwitchOption *on,
+ AlsaSwitchOption *off)
+{
+ AlsaToggle *toggle;
+
+ toggle = g_object_new (ALSA_TYPE_TOGGLE,
+ "name", name,
+ "label", label,
+ "state-option-on", on,
+ "state-option-off", 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);
+
+ /* For toggles the 0/1 value is stored as the switch option id */
+ 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));
+ g_return_if_fail (el != NULL);
+
+ 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;
+
+ toggle = ALSA_TOGGLE (element);
+
+ /* 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_toggle_get_state_option (MATE_MIXER_TOGGLE (toggle), TRUE);
+ else
+ active = mate_mixer_toggle_get_state_option (MATE_MIXER_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;
+}