diff options
Diffstat (limited to '')
-rw-r--r-- | src/filter/plugins/NormalizeFilterPlugin.cxx | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/filter/plugins/NormalizeFilterPlugin.cxx b/src/filter/plugins/NormalizeFilterPlugin.cxx new file mode 100644 index 000000000..a69df2b81 --- /dev/null +++ b/src/filter/plugins/NormalizeFilterPlugin.cxx @@ -0,0 +1,80 @@ +/* + * 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 "filter/FilterPlugin.hxx" +#include "filter/FilterInternal.hxx" +#include "filter/FilterRegistry.hxx" +#include "pcm/PcmBuffer.hxx" +#include "AudioFormat.hxx" +#include "AudioCompress/compress.h" +#include "util/ConstBuffer.hxx" + +#include <string.h> + +class NormalizeFilter final : public Filter { + struct Compressor *compressor; + + PcmBuffer buffer; + +public: + virtual AudioFormat Open(AudioFormat &af, Error &error) override; + virtual void Close(); + virtual ConstBuffer<void> FilterPCM(ConstBuffer<void> src, + Error &error) override; +}; + +static Filter * +normalize_filter_init(gcc_unused const config_param ¶m, + gcc_unused Error &error) +{ + return new NormalizeFilter(); +} + +AudioFormat +NormalizeFilter::Open(AudioFormat &audio_format, gcc_unused Error &error) +{ + audio_format.format = SampleFormat::S16; + + compressor = Compressor_new(0); + + return audio_format; +} + +void +NormalizeFilter::Close() +{ + buffer.Clear(); + Compressor_delete(compressor); +} + +ConstBuffer<void> +NormalizeFilter::FilterPCM(ConstBuffer<void> src, gcc_unused Error &error) +{ + int16_t *dest = (int16_t *)buffer.Get(src.size); + memcpy(dest, src.data, src.size); + + Compressor_Process_int16(compressor, dest, src.size / 2); + return { (const void *)dest, src.size }; +} + +const struct filter_plugin normalize_filter_plugin = { + "normalize", + normalize_filter_init, +}; |