RoarAudio output plugin

src/mixer/roar_mixer_plugin.c

@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * Copyright (C) 2010-2011 Philipp 'ph3-der-loewe' Schafft
+ * Copyright (C) 2010-2011 Hans-Kristian 'maister' Arntzen
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+
+#include "config.h"
+#include "mixer_api.h"
+#include "output_api.h"
+#include "output/roar_output_plugin.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+typedef struct roar_mpd_mixer
+{
+	/** the base mixer class */
+	struct mixer base;
+	roar_t *self;
+} roar_mixer_t;
+
+/**
+ * The quark used for GError.domain.
+ */
+static inline GQuark
+roar_mixer_quark(void)
+{
+	return g_quark_from_static_string("roar_mixer");
+}
+
+static struct mixer *
+roar_mixer_init(void *ao, G_GNUC_UNUSED const struct config_param *param,
+		G_GNUC_UNUSED GError **error_r)
+{
+	roar_mixer_t *self = g_new(roar_mixer_t, 1);
+	self->self = ao;
+
+	mixer_init(&self->base, &roar_mixer_plugin);
+
+	return &self->base;
+}
+
+static void
+roar_mixer_finish(struct mixer *data)
+{
+	roar_mixer_t *self = (roar_mixer_t *) data;
+
+	g_free(self);
+}
+
+static void
+roar_mixer_close(G_GNUC_UNUSED struct mixer *data)
+{
+}
+
+static bool
+roar_mixer_open(G_GNUC_UNUSED struct mixer *data,
+		G_GNUC_UNUSED GError **error_r)
+{
+	return true;
+}
+
+static int
+roar_mixer_get_volume(struct mixer *mixer, G_GNUC_UNUSED GError **error_r)
+{
+	roar_mixer_t *self = (roar_mixer_t *)mixer;
+	g_mutex_lock(self->self->lock);
+	if (self->self->vss && self->self->alive)
+	{
+		float l, r;
+		int error;
+		roar_vs_volume_get(self->self->vss, &l, &r, &error);
+		g_mutex_unlock(self->self->lock);
+		return (l + r) * 50;
+	}
+	else
+	{
+		g_mutex_unlock(self->self->lock);
+		return 0;
+	}
+}
+
+static bool
+roar_mixer_set_volume(struct mixer *mixer, unsigned volume,
+		G_GNUC_UNUSED GError **error_r)
+{
+	roar_mixer_t *self = (roar_mixer_t *)mixer;
+	g_mutex_lock(self->self->lock);
+	if (self->self->vss && self->self->alive)
+	{
+		assert(volume <= 100);
+
+		int error;
+		float level = volume / 100.0;
+
+		roar_vs_volume_mono(self->self->vss, level, &error);
+		g_mutex_unlock(self->self->lock);
+		return true;
+	}
+	else
+	{
+		g_mutex_unlock(self->self->lock);
+		return false;
+	}
+}
+
+const struct mixer_plugin roar_mixer_plugin = {
+	.init = roar_mixer_init,
+	.finish = roar_mixer_finish,
+	.open = roar_mixer_open,
+	.close = roar_mixer_close,
+	.get_volume = roar_mixer_get_volume,
+	.set_volume = roar_mixer_set_volume,
+	.global = false,
+};