Merge branch 'oss-alsa'

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;
+}