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-rw-r--r--src/filter/volume_filter_plugin.c1
-rw-r--r--src/mixer/software_mixer_plugin.c124
-rw-r--r--src/mixer/software_mixer_plugin.h33
-rw-r--r--src/mixer_list.h1
4 files changed, 159 insertions, 0 deletions
diff --git a/src/filter/volume_filter_plugin.c b/src/filter/volume_filter_plugin.c
index efad3362f..039619917 100644
--- a/src/filter/volume_filter_plugin.c
+++ b/src/filter/volume_filter_plugin.c
@@ -25,6 +25,7 @@
#include "pcm_buffer.h"
#include "pcm_volume.h"
#include "audio_format.h"
+#include "player_control.h"
#include <assert.h>
#include <string.h>
diff --git a/src/mixer/software_mixer_plugin.c b/src/mixer/software_mixer_plugin.c
new file mode 100644
index 000000000..661334e1b
--- /dev/null
+++ b/src/mixer/software_mixer_plugin.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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 "software_mixer_plugin.h"
+#include "mixer_api.h"
+#include "filter_plugin.h"
+#include "filter_registry.h"
+#include "filter/volume_filter_plugin.h"
+#include "pcm_volume.h"
+
+#include <assert.h>
+#include <math.h>
+
+struct software_mixer {
+ /** the base mixer class */
+ struct mixer base;
+
+ struct filter *filter;
+
+ unsigned volume;
+};
+
+static struct mixer *
+software_mixer_init(G_GNUC_UNUSED const struct config_param *param)
+{
+ struct software_mixer *sm = g_new(struct software_mixer, 1);
+
+ mixer_init(&sm->base, &software_mixer_plugin);
+
+ sm->filter = filter_new(&volume_filter_plugin, NULL, NULL);
+ assert(sm->filter != NULL);
+
+ sm->volume = 100;
+
+ return &sm->base;
+}
+
+static void
+software_mixer_finish(struct mixer *data)
+{
+ struct software_mixer *sm = (struct software_mixer *)data;
+
+ g_free(sm);
+}
+
+static bool
+software_mixer_open(struct mixer *data)
+{
+ struct software_mixer *sm = (struct software_mixer *)data;
+
+ (void)sm;
+ return true;
+}
+
+static void
+software_mixer_close(struct mixer *data)
+{
+ struct software_mixer *sm = (struct software_mixer *)data;
+
+ (void)sm;
+}
+
+static int
+software_mixer_get_volume(struct mixer *mixer)
+{
+ struct software_mixer *sm = (struct software_mixer *)mixer;
+
+ return sm->volume;
+}
+
+static bool
+software_mixer_set_volume(struct mixer *mixer, unsigned volume)
+{
+ struct software_mixer *sm = (struct software_mixer *)mixer;
+
+ assert(volume <= 100);
+
+ sm->volume = volume;
+
+ if (volume >= 100)
+ volume = PCM_VOLUME_1;
+ else if (volume > 0)
+ volume = pcm_float_to_volume((exp(volume / 25.0) - 1) /
+ (54.5981500331F - 1));
+
+ volume_filter_set(sm->filter, volume);
+ return true;
+}
+
+const struct mixer_plugin software_mixer_plugin = {
+ .init = software_mixer_init,
+ .finish = software_mixer_finish,
+ .open = software_mixer_open,
+ .close = software_mixer_close,
+ .get_volume = software_mixer_get_volume,
+ .set_volume = software_mixer_set_volume,
+ .global = true,
+};
+
+struct filter *
+software_mixer_get_filter(struct mixer *mixer)
+{
+ struct software_mixer *sm = (struct software_mixer *)mixer;
+
+ assert(sm->base.plugin == &software_mixer_plugin);
+
+ return sm->filter;
+}
diff --git a/src/mixer/software_mixer_plugin.h b/src/mixer/software_mixer_plugin.h
new file mode 100644
index 000000000..a59f7edeb
--- /dev/null
+++ b/src/mixer/software_mixer_plugin.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.
+ */
+
+#ifndef SOFTWARE_MIXER_PLUGIN_H
+#define SOFTWARE_MIXER_PLUGIN_H
+
+struct mixer;
+struct filter;
+
+/**
+ * Returns the (volume) filter associated with this mixer. All users
+ * of this mixer plugin should install this filter.
+ */
+struct filter *
+software_mixer_get_filter(struct mixer *mixer);
+
+#endif
diff --git a/src/mixer_list.h b/src/mixer_list.h
index 7db4a00d8..4e81c57b2 100644
--- a/src/mixer_list.h
+++ b/src/mixer_list.h
@@ -25,6 +25,7 @@
#ifndef MPD_MIXER_LIST_H
#define MPD_MIXER_LIST_H
+extern const struct mixer_plugin software_mixer_plugin;
extern const struct mixer_plugin alsa_mixer;
extern const struct mixer_plugin oss_mixer;
extern const struct mixer_plugin pulse_mixer;