67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
/*
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* Copyright (C) 2007-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2009-2011 David Robillard <d@drobilla.net>
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* Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2015-2019 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __ardour_resampled_source_h__
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#define __ardour_resampled_source_h__
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#include <samplerate.h>
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#include "ardour/libardour_visibility.h"
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#include "ardour/types.h"
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#include "ardour/importable_source.h"
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namespace ARDOUR {
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class LIBARDOUR_API ResampledImportableSource : public ImportableSource
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{
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public:
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ResampledImportableSource (std::shared_ptr<ImportableSource>, samplecnt_t rate, SrcQuality);
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~ResampledImportableSource ();
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samplecnt_t read (Sample* buffer, samplecnt_t nframes);
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float ratio() const { return _src_data.src_ratio; }
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uint32_t channels() const { return source->channels(); }
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samplecnt_t length() const { return source->length(); }
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samplecnt_t samplerate() const { return source->samplerate(); }
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void seek (samplepos_t);
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samplepos_t natural_position() const;
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bool clamped_at_unity () const {
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/* resampling may generate inter-sample peaks with magnitude > 1 */
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return false;
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}
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static const uint32_t blocksize;
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private:
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std::shared_ptr<ImportableSource> source;
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float* _input;
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int _src_type;
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SRC_STATE* _src_state;
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SRC_DATA _src_data;
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bool _end_of_input;
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};
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}
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#endif /* __ardour_resampled_source_h__ */
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