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/*
Copyright (C) 2014 Paul Davis
Written by: 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_srcfilesource_h__
#define __ardour_srcfilesource_h__
#include <cstring>
#include <samplerate.h>
#include "ardour/libardour_visibility.h"
#include "ardour/audiofilesource.h"
#include "ardour/session.h"
namespace ARDOUR {
class LIBARDOUR_API SrcFileSource : public AudioFileSource {
public:
SrcFileSource (Session&, boost::shared_ptr<AudioFileSource>, SrcQuality srcq = SrcQuality(SrcQuick));
~SrcFileSource ();
int update_header (samplepos_t /*when*/, struct tm&, time_t) { return 0; }
int flush_header () { return 0; }
void flush () { }
void set_header_timeline_position () {};
void set_length (samplecnt_t /*len*/) {};
float sample_rate () const { return _session.nominal_sample_rate(); }
samplepos_t natural_position() const { return _source->natural_position() * _ratio;}
samplecnt_t readable_length() const { return _source->readable_length() * _ratio; }
samplecnt_t length (samplepos_t pos) const { return _source->length(pos) * _ratio; }
bool destructive() const { return false; }
bool can_be_analysed() const { return false; }
bool clamped_at_unity() const { return false; }
protected:
void close ();
samplecnt_t read_unlocked (Sample *dst, samplepos_t start, samplecnt_t cnt) const;
samplecnt_t write_unlocked (Sample */*dst*/, samplecnt_t /*cnt*/) { return 0; }
int read_peaks_with_fpp (PeakData *peaks, samplecnt_t npeaks, samplepos_t /*start*/, samplecnt_t /*cnt*/,
double /*samples_per_unit*/, samplecnt_t /*fpp*/) const {
memset (peaks, 0, sizeof (PeakData) * npeaks);
return 0;
}
private:
static const uint32_t max_blocksize;
boost::shared_ptr<AudioFileSource> _source;
mutable SRC_STATE* _src_state;
mutable SRC_DATA _src_data;
mutable Sample* _src_buffer;
mutable samplepos_t _source_position;
mutable samplepos_t _target_position;
mutable double _fract_position;
double _ratio;
samplecnt_t src_buffer_size;
};
} // namespace ARDOUR
#endif /* __ardour_audiofilesource_h__ */
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