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-rw-r--r--src/output/NullOutputPlugin.cxx136
1 files changed, 136 insertions, 0 deletions
diff --git a/src/output/NullOutputPlugin.cxx b/src/output/NullOutputPlugin.cxx
new file mode 100644
index 000000000..3596cbdcb
--- /dev/null
+++ b/src/output/NullOutputPlugin.cxx
@@ -0,0 +1,136 @@
+/*
+ * 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 "NullOutputPlugin.hxx"
+#include "output_api.h"
+#include "timer.h"
+
+#include <glib.h>
+
+#include <assert.h>
+
+struct NullOutput {
+ struct audio_output base;
+
+ bool sync;
+
+ struct timer *timer;
+};
+
+static struct audio_output *
+null_init(const struct config_param *param, GError **error_r)
+{
+ NullOutput *nd = g_new(NullOutput, 1);
+
+ if (!ao_base_init(&nd->base, &null_output_plugin, param, error_r)) {
+ g_free(nd);
+ return NULL;
+ }
+
+ nd->sync = config_get_block_bool(param, "sync", true);
+
+ return &nd->base;
+}
+
+static void
+null_finish(struct audio_output *ao)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ ao_base_finish(&nd->base);
+ g_free(nd);
+}
+
+static bool
+null_open(struct audio_output *ao, struct audio_format *audio_format,
+ G_GNUC_UNUSED GError **error)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ if (nd->sync)
+ nd->timer = timer_new(audio_format);
+
+ return true;
+}
+
+static void
+null_close(struct audio_output *ao)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ if (nd->sync)
+ timer_free(nd->timer);
+}
+
+static unsigned
+null_delay(struct audio_output *ao)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ return nd->sync && nd->timer->started
+ ? timer_delay(nd->timer)
+ : 0;
+}
+
+static size_t
+null_play(struct audio_output *ao, G_GNUC_UNUSED const void *chunk, size_t size,
+ G_GNUC_UNUSED GError **error)
+{
+ NullOutput *nd = (NullOutput *)ao;
+ struct timer *timer = nd->timer;
+
+ if (!nd->sync)
+ return size;
+
+ if (!timer->started)
+ timer_start(timer);
+ timer_add(timer, size);
+
+ return size;
+}
+
+static void
+null_cancel(struct audio_output *ao)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ if (!nd->sync)
+ return;
+
+ timer_reset(nd->timer);
+}
+
+const struct audio_output_plugin null_output_plugin = {
+ "null",
+ nullptr,
+ null_init,
+ null_finish,
+ nullptr,
+ nullptr,
+ null_open,
+ null_close,
+ null_delay,
+ nullptr,
+ null_play,
+ nullptr,
+ null_cancel,
+ nullptr,
+ nullptr,
+};