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/*
* 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,
};
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