aboutsummaryrefslogtreecommitdiffstats
path: root/src/MixerControl.cxx
diff options
context:
space:
mode:
authorMax Kellermann <max@duempel.org>2013-02-22 20:51:23 +0100
committerMax Kellermann <max@duempel.org>2013-02-22 20:51:23 +0100
commit496f70fc0d717719a6defb645918785381efa22b (patch)
tree7b0e8b58d53ebac96fd5ece67158038bb1c10dcc /src/MixerControl.cxx
parent9ede4c5f3c5b72e8be2ee2e58ffdf36af019b607 (diff)
downloadmpd-496f70fc0d717719a6defb645918785381efa22b.tar.gz
mpd-496f70fc0d717719a6defb645918785381efa22b.tar.xz
mpd-496f70fc0d717719a6defb645918785381efa22b.zip
mixer_plugin: convert to C++
Diffstat (limited to 'src/MixerControl.cxx')
-rw-r--r--src/MixerControl.cxx185
1 files changed, 185 insertions, 0 deletions
diff --git a/src/MixerControl.cxx b/src/MixerControl.cxx
new file mode 100644
index 000000000..4ca1c76ec
--- /dev/null
+++ b/src/MixerControl.cxx
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2003-2013 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 "config.h"
+#include "MixerControl.hxx"
+#include "MixerInternal.hxx"
+
+#include <assert.h>
+#include <stddef.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "mixer"
+
+struct mixer *
+mixer_new(const struct mixer_plugin *plugin, void *ao,
+ const struct config_param *param,
+ GError **error_r)
+{
+ struct mixer *mixer;
+
+ assert(plugin != NULL);
+
+ mixer = plugin->init(ao, param, error_r);
+
+ assert(mixer == NULL || mixer->plugin == plugin);
+
+ return mixer;
+}
+
+void
+mixer_free(struct mixer *mixer)
+{
+ assert(mixer != NULL);
+ assert(mixer->plugin != NULL);
+ assert(mixer->mutex != NULL);
+
+ /* mixers with the "global" flag set might still be open at
+ this point (see mixer_auto_close()) */
+ mixer_close(mixer);
+
+ g_mutex_free(mixer->mutex);
+
+ mixer->plugin->finish(mixer);
+}
+
+bool
+mixer_open(struct mixer *mixer, GError **error_r)
+{
+ bool success;
+
+ assert(mixer != NULL);
+ assert(mixer->plugin != NULL);
+
+ g_mutex_lock(mixer->mutex);
+
+ if (mixer->open)
+ success = true;
+ else if (mixer->plugin->open == NULL)
+ success = mixer->open = true;
+ else
+ success = mixer->open = mixer->plugin->open(mixer, error_r);
+
+ mixer->failed = !success;
+
+ g_mutex_unlock(mixer->mutex);
+
+ return success;
+}
+
+static void
+mixer_close_internal(struct mixer *mixer)
+{
+ assert(mixer != NULL);
+ assert(mixer->plugin != NULL);
+ assert(mixer->open);
+
+ if (mixer->plugin->close != NULL)
+ mixer->plugin->close(mixer);
+
+ mixer->open = false;
+}
+
+void
+mixer_close(struct mixer *mixer)
+{
+ assert(mixer != NULL);
+ assert(mixer->plugin != NULL);
+
+ g_mutex_lock(mixer->mutex);
+
+ if (mixer->open)
+ mixer_close_internal(mixer);
+
+ g_mutex_unlock(mixer->mutex);
+}
+
+void
+mixer_auto_close(struct mixer *mixer)
+{
+ if (!mixer->plugin->global)
+ mixer_close(mixer);
+}
+
+/*
+ * Close the mixer due to failure. The mutex must be locked before
+ * calling this function.
+ */
+static void
+mixer_failed(struct mixer *mixer)
+{
+ assert(mixer->open);
+
+ mixer_close_internal(mixer);
+
+ mixer->failed = true;
+}
+
+int
+mixer_get_volume(struct mixer *mixer, GError **error_r)
+{
+ int volume;
+
+ assert(mixer != NULL);
+
+ if (mixer->plugin->global && !mixer->failed &&
+ !mixer_open(mixer, error_r))
+ return -1;
+
+ g_mutex_lock(mixer->mutex);
+
+ if (mixer->open) {
+ GError *error = NULL;
+
+ volume = mixer->plugin->get_volume(mixer, &error);
+ if (volume < 0 && error != NULL) {
+ g_propagate_error(error_r, error);
+ mixer_failed(mixer);
+ }
+ } else
+ volume = -1;
+
+ g_mutex_unlock(mixer->mutex);
+
+ return volume;
+}
+
+bool
+mixer_set_volume(struct mixer *mixer, unsigned volume, GError **error_r)
+{
+ bool success;
+
+ assert(mixer != NULL);
+ assert(volume <= 100);
+
+ if (mixer->plugin->global && !mixer->failed &&
+ !mixer_open(mixer, error_r))
+ return false;
+
+ g_mutex_lock(mixer->mutex);
+
+ if (mixer->open) {
+ success = mixer->plugin->set_volume(mixer, volume, error_r);
+ } else
+ success = false;
+
+ g_mutex_unlock(mixer->mutex);
+
+ return success;
+}