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Diffstat (limited to 'src/filter/NullFilterPlugin.cxx')
-rw-r--r-- | src/filter/NullFilterPlugin.cxx | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/filter/NullFilterPlugin.cxx b/src/filter/NullFilterPlugin.cxx new file mode 100644 index 00000000..d68065a3 --- /dev/null +++ b/src/filter/NullFilterPlugin.cxx @@ -0,0 +1,60 @@ +/* + * 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. + */ + +/** \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 "FilterPlugin.hxx" +#include "FilterInternal.hxx" +#include "FilterRegistry.hxx" +#include "gcc.h" + +class NullFilter final : public Filter { +public: + virtual const audio_format *Open(audio_format &af, + gcc_unused GError **error_r) { + return ⁡ + } + + virtual void Close() {} + + virtual const void *FilterPCM(const void *src, size_t src_size, + size_t *dest_size_r, + gcc_unused GError **error_r) { + *dest_size_r = src_size; + return src; + } +}; + +static Filter * +null_filter_init(gcc_unused const struct config_param *param, + gcc_unused GError **error_r) +{ + return new NullFilter(); +} + +const struct filter_plugin null_filter_plugin = { + "null", + null_filter_init, +}; |