moved from Mate-Extra

1 files changed, 245 insertions, 0 deletions

diff --git a/mate-volume-control/src/gvc-channel-map.c b/mate-volume-control/src/gvc-channel-map.c
new file mode 100644
index 0000000..a7a412c
--- /dev/null
+++ b/mate-volume-control/src/gvc-channel-map.c
@@ -0,0 +1,245 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2008 William Jon McCann
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+
+#include <pulse/pulseaudio.h>
+
+#include "gvc-channel-map.h"
+
+#define GVC_CHANNEL_MAP_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GVC_TYPE_CHANNEL_MAP, GvcChannelMapPrivate))
+
+struct GvcChannelMapPrivate
+{
+        pa_channel_map        pa_map;
+        gboolean              pa_volume_is_set;
+        pa_cvolume            pa_volume;
+        gdouble               extern_volume[NUM_TYPES]; /* volume, balance, fade, lfe */
+        gboolean              can_balance;
+        gboolean              can_fade;
+};
+
+enum {
+        VOLUME_CHANGED,
+        LAST_SIGNAL
+};
+
+static guint signals [LAST_SIGNAL] = { 0, };
+
+static void     gvc_channel_map_class_init (GvcChannelMapClass *klass);
+static void     gvc_channel_map_init       (GvcChannelMap      *channel_map);
+static void     gvc_channel_map_finalize   (GObject            *object);
+
+G_DEFINE_TYPE (GvcChannelMap, gvc_channel_map, G_TYPE_OBJECT)
+
+guint
+gvc_channel_map_get_num_channels (const GvcChannelMap *map)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), 0);
+
+        if (!pa_channel_map_valid(&map->priv->pa_map))
+                return 0;
+
+        return map->priv->pa_map.channels;
+}
+
+const gdouble *
+gvc_channel_map_get_volume (GvcChannelMap *map)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), NULL);
+
+        if (!pa_channel_map_valid(&map->priv->pa_map))
+                return NULL;
+
+        map->priv->extern_volume[VOLUME] = (gdouble) pa_cvolume_max (&map->priv->pa_volume);
+        if (gvc_channel_map_can_balance (map))
+                map->priv->extern_volume[BALANCE] = (gdouble) pa_cvolume_get_balance (&map->priv->pa_volume, &map->priv->pa_map);
+        else
+                map->priv->extern_volume[BALANCE] = 0;
+        if (gvc_channel_map_can_fade (map))
+                map->priv->extern_volume[FADE] = (gdouble) pa_cvolume_get_fade (&map->priv->pa_volume, &map->priv->pa_map);
+        else
+                map->priv->extern_volume[FADE] = 0;
+        if (gvc_channel_map_has_lfe (map))
+                map->priv->extern_volume[LFE] = (gdouble) pa_cvolume_get_position (&map->priv->pa_volume, &map->priv->pa_map, PA_CHANNEL_POSITION_LFE);
+        else
+                map->priv->extern_volume[LFE] = 0;
+
+        return map->priv->extern_volume;
+}
+
+gboolean
+gvc_channel_map_can_balance (const GvcChannelMap  *map)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), FALSE);
+
+        return map->priv->can_balance;
+}
+
+gboolean
+gvc_channel_map_can_fade (const GvcChannelMap  *map)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), FALSE);
+
+        return map->priv->can_fade;
+}
+
+const char *
+gvc_channel_map_get_mapping (const GvcChannelMap  *map)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), NULL);
+
+        if (!pa_channel_map_valid(&map->priv->pa_map))
+                return NULL;
+
+        return pa_channel_map_to_pretty_name (&map->priv->pa_map);
+}
+
+gboolean
+gvc_channel_map_has_position (const GvcChannelMap  *map,
+                              pa_channel_position_t position)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), FALSE);
+
+        return pa_channel_map_has_position (&(map->priv->pa_map), position);
+}
+
+const pa_channel_map *
+gvc_channel_map_get_pa_channel_map (const GvcChannelMap  *map)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), NULL);
+
+        if (!pa_channel_map_valid(&map->priv->pa_map))
+                return NULL;
+
+        return &map->priv->pa_map;
+}
+
+const pa_cvolume *
+gvc_channel_map_get_cvolume (const GvcChannelMap  *map)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), NULL);
+
+        if (!pa_channel_map_valid(&map->priv->pa_map))
+                return NULL;
+
+        return &map->priv->pa_volume;
+}
+
+static void
+gvc_channel_map_class_init (GvcChannelMapClass *klass)
+{
+        GObjectClass   *gobject_class = G_OBJECT_CLASS (klass);
+
+        gobject_class->finalize = gvc_channel_map_finalize;
+
+        signals [VOLUME_CHANGED] =
+                g_signal_new ("volume-changed",
+                              G_TYPE_FROM_CLASS (klass),
+                              G_SIGNAL_RUN_LAST,
+                              G_STRUCT_OFFSET (GvcChannelMapClass, volume_changed),
+                              NULL, NULL,
+                              g_cclosure_marshal_VOID__BOOLEAN,
+                              G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
+
+        g_type_class_add_private (klass, sizeof (GvcChannelMapPrivate));
+}
+
+void
+gvc_channel_map_volume_changed (GvcChannelMap     *map,
+                                const pa_cvolume  *cv,
+                                gboolean           set)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_MAP (map));
+        g_return_if_fail (cv != NULL);
+        g_return_if_fail (pa_cvolume_compatible_with_channel_map(cv, &map->priv->pa_map));
+
+        if (pa_cvolume_equal(cv, &map->priv->pa_volume))
+                return;
+
+        map->priv->pa_volume = *cv;
+
+        if (map->priv->pa_volume_is_set == FALSE) {
+                map->priv->pa_volume_is_set = TRUE;
+                return;
+        }
+        g_signal_emit (map, signals[VOLUME_CHANGED], 0, set);
+}
+
+static void
+gvc_channel_map_init (GvcChannelMap *map)
+{
+        map->priv = GVC_CHANNEL_MAP_GET_PRIVATE (map);
+        map->priv->pa_volume_is_set = FALSE;
+}
+
+static void
+gvc_channel_map_finalize (GObject *object)
+{
+        GvcChannelMap *channel_map;
+
+        g_return_if_fail (object != NULL);
+        g_return_if_fail (GVC_IS_CHANNEL_MAP (object));
+
+        channel_map = GVC_CHANNEL_MAP (object);
+
+        g_return_if_fail (channel_map->priv != NULL);
+
+        G_OBJECT_CLASS (gvc_channel_map_parent_class)->finalize (object);
+}
+
+GvcChannelMap *
+gvc_channel_map_new (void)
+{
+        GObject *map;
+        map = g_object_new (GVC_TYPE_CHANNEL_MAP, NULL);
+        return GVC_CHANNEL_MAP (map);
+}
+
+static void
+set_from_pa_map (GvcChannelMap        *map,
+                 const pa_channel_map *pa_map)
+{
+        g_assert (pa_channel_map_valid(pa_map));
+
+        map->priv->can_balance = pa_channel_map_can_balance (pa_map);
+        map->priv->can_fade = pa_channel_map_can_fade (pa_map);
+
+        map->priv->pa_map = *pa_map;
+        pa_cvolume_set(&map->priv->pa_volume, pa_map->channels, PA_VOLUME_NORM);
+}
+
+GvcChannelMap *
+gvc_channel_map_new_from_pa_channel_map (const pa_channel_map *pa_map)
+{
+        GObject *map;
+        map = g_object_new (GVC_TYPE_CHANNEL_MAP, NULL);
+
+        set_from_pa_map (GVC_CHANNEL_MAP (map), pa_map);
+
+        return GVC_CHANNEL_MAP (map);
+}