83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
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* Copyright (C) 2014-2015 Robin Gareus <robin@gareus.org>
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* Copyright (C) 2014-2017 Paul Davis <paul@linuxaudiosystems.com>
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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_srcfilesource_h__
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#define __ardour_srcfilesource_h__
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#include <cstring>
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#include <samplerate.h>
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#include "ardour/libardour_visibility.h"
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#include "ardour/audiofilesource.h"
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#include "ardour/session.h"
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namespace ARDOUR {
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class LIBARDOUR_API SrcFileSource : public AudioFileSource {
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public:
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SrcFileSource (Session&, boost::shared_ptr<AudioFileSource>, SrcQuality srcq = SrcQuality(SrcQuick));
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~SrcFileSource ();
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int update_header (samplepos_t /*when*/, struct tm&, time_t) { return 0; }
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int flush_header () { return 0; }
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void flush () { }
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void set_header_natural_position () {};
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void set_length (samplecnt_t /*len*/) {};
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float sample_rate () const { return _session.nominal_sample_rate(); }
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timepos_t natural_position() const { return _source->natural_position().scale (_ratio); }
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samplecnt_t readable_length_samples() const { assert (_source->length().time_domain() == Temporal::AudioTime); return _source->length().samples () * _ratio; }
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timepos_t length () const { assert (_source->length().time_domain() == Temporal::AudioTime); return timepos_t ((samplepos_t) (_source->length().samples () * _ratio)); }
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bool can_be_analysed() const { return false; }
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bool clamped_at_unity() const { return false; }
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protected:
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void close ();
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samplecnt_t read_unlocked (Sample *dst, samplepos_t start, samplecnt_t cnt) const;
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samplecnt_t write_unlocked (Sample */*dst*/, samplecnt_t /*cnt*/) { return 0; }
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int read_peaks_with_fpp (PeakData *peaks, samplecnt_t npeaks, samplepos_t /*start*/, samplecnt_t /*cnt*/,
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double /*samples_per_unit*/, samplecnt_t /*fpp*/) const {
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memset (peaks, 0, sizeof (PeakData) * npeaks);
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return 0;
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}
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private:
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static const uint32_t max_blocksize;
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boost::shared_ptr<AudioFileSource> _source;
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mutable SRC_STATE* _src_state;
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mutable SRC_DATA _src_data;
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mutable Sample* _src_buffer;
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mutable samplepos_t _source_position;
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mutable samplepos_t _target_position;
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mutable double _fract_position;
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double _ratio;
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samplecnt_t src_buffer_size;
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};
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} // namespace ARDOUR
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#endif /* __ardour_audiofilesource_h__ */
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