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/*
* Copyright (C) 2003-2011 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_plugin.h"
#include "filter_internal.h"
#include "filter_registry.h"
#include "audio_format.h"
#include "AudioCompress/compress.h"
#include <assert.h>
#include <string.h>
#include <libavutil/frame.h>
#include <libavutil/samplefmt.h>
struct normalize_filter {
struct filter filter;
struct Compressor *compressor;
};
static inline GQuark
normalize_quark(void)
{
return g_quark_from_static_string("normalize");
}
static struct filter *
normalize_filter_init(G_GNUC_UNUSED const struct config_param *param,
G_GNUC_UNUSED GError **error_r)
{
struct normalize_filter *filter = g_new(struct normalize_filter, 1);
filter_init(&filter->filter, &normalize_filter_plugin);
return &filter->filter;
}
static void
normalize_filter_finish(struct filter *filter)
{
g_free(filter);
}
static const struct audio_format *
normalize_filter_open(struct filter *_filter,
struct audio_format *audio_format,
G_GNUC_UNUSED GError **error_r)
{
struct normalize_filter *filter = (struct normalize_filter *)_filter;
audio_format->format = SAMPLE_FORMAT_S16;
filter->compressor = Compressor_new(0);
return audio_format;
}
static void
normalize_filter_close(struct filter *_filter)
{
struct normalize_filter *filter = (struct normalize_filter *)_filter;
Compressor_delete(filter->compressor);
}
static AVFrame *normalize_filter_filter(struct filter *_filter,
AVFrame *frame)
{
struct normalize_filter *filter = (struct normalize_filter *)_filter;
int ret = av_frame_make_writable(frame);
if (ret < 0) {
av_frame_free(&frame);
return NULL;
}
Compressor_Process_int16(filter->compressor, (uint16_t*)frame->data[0], frame->linesize[0] / 2);
return frame;
}
const struct filter_plugin normalize_filter_plugin = {
.name = "normalize",
.init = normalize_filter_init,
.finish = normalize_filter_finish,
.open = normalize_filter_open,
.close = normalize_filter_close,
.filter = normalize_filter_filter,
};
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