2 Copyright (C) 2014 Paul Davis
3 Written by: Robin Gareus <robin@gareus.org>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #ifndef __ardour_srcfilesource_h__
22 #define __ardour_srcfilesource_h__
25 #include <samplerate.h>
27 #include "ardour/libardour_visibility.h"
28 #include "ardour/audiofilesource.h"
29 #include "ardour/session.h"
33 class LIBARDOUR_API SrcFileSource : public AudioFileSource {
35 SrcFileSource (Session&, boost::shared_ptr<AudioFileSource>, SrcQuality srcq = SrcQuality(SrcQuick));
38 int update_header (framepos_t /*when*/, struct tm&, time_t) { return 0; }
39 int flush_header () { return 0; }
41 void set_header_timeline_position () {};
42 void set_length (framecnt_t /*len*/) {};
44 float sample_rate () const { return _session.nominal_frame_rate(); }
46 framepos_t natural_position() const { return _source->natural_position() * _ratio;}
47 framecnt_t readable_length() const { return _source->readable_length() * _ratio; }
48 framecnt_t length (framepos_t pos) const { return _source->length(pos) * _ratio; }
50 bool destructive() const { return false; }
51 bool can_be_analysed() const { return false; }
52 bool clamped_at_unity() const { return false; }
56 framecnt_t read_unlocked (Sample *dst, framepos_t start, framecnt_t cnt) const;
57 framecnt_t write_unlocked (Sample */*dst*/, framecnt_t /*cnt*/) { return 0; }
59 int read_peaks_with_fpp (PeakData *peaks, framecnt_t npeaks, framepos_t /*start*/, framecnt_t /*cnt*/,
60 double /*samples_per_unit*/, framecnt_t /*fpp*/) const {
61 memset (peaks, 0, sizeof (PeakData) * npeaks);
66 static const uint32_t blocksize;
67 boost::shared_ptr<AudioFileSource> _source;
69 mutable SRC_STATE* _src_state;
70 mutable SRC_DATA _src_data;
72 mutable Sample* _src_buffer;
73 mutable framepos_t _source_position;
74 mutable framepos_t _target_position;
75 mutable double _fract_position;
78 framecnt_t src_buffer_size;
83 #endif /* __ardour_audiofilesource_h__ */