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/*
* Copyright (C) 2007-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2009-2011 David Robillard <d@drobilla.net>
* Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2015-2019 Robin Gareus <robin@gareus.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.
*/
#ifndef __ardour_resampled_source_h__
#define __ardour_resampled_source_h__
#include <samplerate.h>
#include "ardour/libardour_visibility.h"
#include "ardour/types.h"
#include "ardour/importable_source.h"
namespace ARDOUR {
class LIBARDOUR_API ResampledImportableSource : public ImportableSource
{
public:
ResampledImportableSource (boost::shared_ptr<ImportableSource>, samplecnt_t rate, SrcQuality);
~ResampledImportableSource ();
samplecnt_t read (Sample* buffer, samplecnt_t nframes);
float ratio() const { return _src_data.src_ratio; }
uint32_t channels() const { return source->channels(); }
samplecnt_t length() const { return source->length(); }
samplecnt_t samplerate() const { return source->samplerate(); }
void seek (samplepos_t);
samplepos_t natural_position() const;
bool clamped_at_unity () const {
/* resampling may generate inter-sample peaks with magnitude > 1 */
return false;
}
static const uint32_t blocksize;
private:
boost::shared_ptr<ImportableSource> source;
float* _input;
int _src_type;
SRC_STATE* _src_state;
SRC_DATA _src_data;
bool _end_of_input;
};
}
#endif /* __ardour_resampled_source_h__ */
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