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/*
* 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 "AutoConvertFilterPlugin.hxx"
#include "ConvertFilterPlugin.hxx"
#include "filter/FilterPlugin.hxx"
#include "filter/FilterInternal.hxx"
#include "filter/FilterRegistry.hxx"
#include "AudioFormat.hxx"
#include "config/ConfigData.hxx"
#include "util/ConstBuffer.hxx"
#include <assert.h>
class AutoConvertFilter final : public Filter {
/**
* The underlying filter.
*/
Filter *filter;
/**
* A convert_filter, just in case conversion is needed. nullptr
* if unused.
*/
Filter *convert;
public:
AutoConvertFilter(Filter *_filter):filter(_filter) {}
~AutoConvertFilter() {
delete filter;
}
virtual AudioFormat Open(AudioFormat &af, Error &error) override;
virtual void Close() override;
virtual ConstBuffer<void> FilterPCM(ConstBuffer<void> src,
Error &error) override;
};
AudioFormat
AutoConvertFilter::Open(AudioFormat &in_audio_format, Error &error)
{
assert(in_audio_format.IsValid());
/* open the "real" filter */
AudioFormat child_audio_format = in_audio_format;
AudioFormat out_audio_format = filter->Open(child_audio_format, error);
if (!out_audio_format.IsDefined())
return out_audio_format;
/* need to convert? */
if (in_audio_format != child_audio_format) {
/* yes - create a convert_filter */
const config_param empty;
convert = filter_new(&convert_filter_plugin, empty, error);
if (convert == nullptr) {
filter->Close();
return AudioFormat::Undefined();
}
AudioFormat audio_format2 = in_audio_format;
AudioFormat audio_format3 =
convert->Open(audio_format2, error);
if (!audio_format3.IsDefined()) {
delete convert;
filter->Close();
return AudioFormat::Undefined();
}
assert(audio_format2 == in_audio_format);
if (!convert_filter_set(convert, child_audio_format, error)) {
delete convert;
filter->Close();
return AudioFormat::Undefined();
}
} else
/* no */
convert = nullptr;
return out_audio_format;
}
void
AutoConvertFilter::Close()
{
if (convert != nullptr) {
convert->Close();
delete convert;
}
filter->Close();
}
ConstBuffer<void>
AutoConvertFilter::FilterPCM(ConstBuffer<void> src, Error &error)
{
if (convert != nullptr) {
src = convert->FilterPCM(src, error);
if (src.IsNull())
return nullptr;
}
return filter->FilterPCM(src, error);
}
Filter *
autoconvert_filter_new(Filter *filter)
{
return new AutoConvertFilter(filter);
}
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