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-rw-r--r--src/output/plugins/NullOutputPlugin.cxx138
1 files changed, 138 insertions, 0 deletions
diff --git a/src/output/plugins/NullOutputPlugin.cxx b/src/output/plugins/NullOutputPlugin.cxx
new file mode 100644
index 000000000..098f58926
--- /dev/null
+++ b/src/output/plugins/NullOutputPlugin.cxx
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2003-2014 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 "../OutputAPI.hxx"
+#include "../Timer.hxx"
+
+struct NullOutput {
+ AudioOutput base;
+
+ bool sync;
+
+ Timer *timer;
+
+ NullOutput()
+ :base(null_output_plugin) {}
+
+ bool Initialize(const config_param &param, Error &error) {
+ return base.Configure(param, error);
+ }
+};
+
+static AudioOutput *
+null_init(const config_param &param, Error &error)
+{
+ NullOutput *nd = new NullOutput();
+
+ if (!nd->Initialize(param, error)) {
+ delete nd;
+ return nullptr;
+ }
+
+ nd->sync = param.GetBlockValue("sync", true);
+
+ return &nd->base;
+}
+
+static void
+null_finish(AudioOutput *ao)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ delete nd;
+}
+
+static bool
+null_open(AudioOutput *ao, AudioFormat &audio_format,
+ gcc_unused Error &error)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ if (nd->sync)
+ nd->timer = new Timer(audio_format);
+
+ return true;
+}
+
+static void
+null_close(AudioOutput *ao)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ if (nd->sync)
+ delete nd->timer;
+}
+
+static unsigned
+null_delay(AudioOutput *ao)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ return nd->sync && nd->timer->IsStarted()
+ ? nd->timer->GetDelay()
+ : 0;
+}
+
+static size_t
+null_play(AudioOutput *ao, gcc_unused const void *chunk, size_t size,
+ gcc_unused Error &error)
+{
+ NullOutput *nd = (NullOutput *)ao;
+ Timer *timer = nd->timer;
+
+ if (!nd->sync)
+ return size;
+
+ if (!timer->IsStarted())
+ timer->Start();
+ timer->Add(size);
+
+ return size;
+}
+
+static void
+null_cancel(AudioOutput *ao)
+{
+ NullOutput *nd = (NullOutput *)ao;
+
+ if (!nd->sync)
+ return;
+
+ nd->timer->Reset();
+}
+
+const struct AudioOutputPlugin 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,
+};