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Diffstat (limited to '')
-rw-r--r-- | src/filter/NormalizeFilterPlugin.cxx | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/filter/NormalizeFilterPlugin.cxx b/src/filter/NormalizeFilterPlugin.cxx new file mode 100644 index 000000000..e18c5cdf9 --- /dev/null +++ b/src/filter/NormalizeFilterPlugin.cxx @@ -0,0 +1,84 @@ +/* + * 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 "FilterPlugin.hxx" +#include "FilterInternal.hxx" +#include "FilterRegistry.hxx" +#include "pcm_buffer.h" +#include "audio_format.h" +#include "AudioCompress/compress.h" + +#include <assert.h> +#include <string.h> + +class NormalizeFilter final : public Filter { + struct Compressor *compressor; + + struct pcm_buffer buffer; + +public: + virtual const audio_format *Open(audio_format &af, GError **error_r); + virtual void Close(); + virtual const void *FilterPCM(const void *src, size_t src_size, + size_t *dest_size_r, GError **error_r); +}; + +static Filter * +normalize_filter_init(gcc_unused const struct config_param *param, + gcc_unused GError **error_r) +{ + return new NormalizeFilter(); +} + +const struct audio_format * +NormalizeFilter::Open(audio_format &audio_format, gcc_unused GError **error_r) +{ + audio_format.format = SAMPLE_FORMAT_S16; + + compressor = Compressor_new(0); + pcm_buffer_init(&buffer); + + return &audio_format; +} + +void +NormalizeFilter::Close() +{ + pcm_buffer_deinit(&buffer); + Compressor_delete(compressor); +} + +const void * +NormalizeFilter::FilterPCM(const void *src, size_t src_size, + size_t *dest_size_r, gcc_unused GError **error_r) +{ + int16_t *dest = (int16_t *)pcm_buffer_get(&buffer, src_size); + memcpy(dest, src, src_size); + + Compressor_Process_int16(compressor, dest, src_size / 2); + + *dest_size_r = src_size; + return dest; +} + +const struct filter_plugin normalize_filter_plugin = { + "normalize", + normalize_filter_init, +}; |