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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 "ConvertFilterPlugin.hxx"
#include "FilterPlugin.hxx"
#include "FilterInternal.hxx"
#include "FilterRegistry.hxx"
#include "conf.h"
#include "pcm/PcmConvert.hxx"
#include "util/Manual.hxx"
#include "AudioFormat.hxx"
#include "poison.h"
#include <assert.h>
#include <string.h>
class ConvertFilter final : public Filter {
/**
* The input audio format; PCM data is passed to the filter()
* method in this format.
*/
AudioFormat in_audio_format;
/**
* The output audio format; the consumer of this plugin
* expects PCM data in this format. This defaults to
* #in_audio_format, and can be set with convert_filter_set().
*/
AudioFormat out_audio_format;
Manual<PcmConvert> state;
public:
void Set(const AudioFormat &_out_audio_format) {
assert(in_audio_format.IsValid());
assert(out_audio_format.IsValid());
assert(_out_audio_format.IsValid());
out_audio_format = _out_audio_format;
}
virtual AudioFormat Open(AudioFormat &af, GError **error_r) override;
virtual void Close();
virtual const void *FilterPCM(const void *src, size_t src_size,
size_t *dest_size_r, GError **error_r);
};
static Filter *
convert_filter_init(gcc_unused const config_param ¶m,
gcc_unused GError **error_r)
{
return new ConvertFilter();
}
AudioFormat
ConvertFilter::Open(AudioFormat &audio_format, gcc_unused GError **error_r)
{
assert(audio_format.IsValid());
in_audio_format = out_audio_format = audio_format;
state.Construct();
return in_audio_format;
}
void
ConvertFilter::Close()
{
state.Destruct();
poison_undefined(&in_audio_format, sizeof(in_audio_format));
poison_undefined(&out_audio_format, sizeof(out_audio_format));
}
const void *
ConvertFilter::FilterPCM(const void *src, size_t src_size,
size_t *dest_size_r, GError **error_r)
{
if (in_audio_format == out_audio_format) {
/* optimized special case: no-op */
*dest_size_r = src_size;
return src;
}
return state->Convert(in_audio_format,
src, src_size,
out_audio_format, dest_size_r,
error_r);
}
const struct filter_plugin convert_filter_plugin = {
"convert",
convert_filter_init,
};
void
convert_filter_set(Filter *_filter, const AudioFormat out_audio_format)
{
ConvertFilter *filter = (ConvertFilter *)_filter;
filter->Set(out_audio_format);
}
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