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Diffstat (limited to '')
-rw-r--r-- | src/filter/plugins/NullFilterPlugin.cxx | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/filter/plugins/NullFilterPlugin.cxx b/src/filter/plugins/NullFilterPlugin.cxx new file mode 100644 index 000000000..ebd8e4ec5 --- /dev/null +++ b/src/filter/plugins/NullFilterPlugin.cxx @@ -0,0 +1,60 @@ +/* + * 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. + */ + +/** \file + * + * This filter plugin does nothing. That is not quite useful, except + * for testing the filter core, or as a template for new filter + * plugins. + */ + +#include "config.h" +#include "filter/FilterPlugin.hxx" +#include "filter/FilterInternal.hxx" +#include "filter/FilterRegistry.hxx" +#include "AudioFormat.hxx" +#include "Compiler.h" +#include "util/ConstBuffer.hxx" + +class NullFilter final : public Filter { +public: + virtual AudioFormat Open(AudioFormat &af, + gcc_unused Error &error) override { + return af; + } + + virtual void Close() override {} + + virtual ConstBuffer<void> FilterPCM(ConstBuffer<void> src, + gcc_unused Error &error) override { + return src; + } +}; + +static Filter * +null_filter_init(gcc_unused const config_param ¶m, + gcc_unused Error &error) +{ + return new NullFilter(); +} + +const struct filter_plugin null_filter_plugin = { + "null", + null_filter_init, +}; |