2 Copyright (C) 2007 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_resampled_source_h__
21 #define __ardour_resampled_source_h__
23 #include <samplerate.h>
25 #include "ardour/libardour_visibility.h"
26 #include "ardour/types.h"
27 #include "ardour/importable_source.h"
31 class LIBARDOUR_API ResampledImportableSource : public ImportableSource
34 ResampledImportableSource (boost::shared_ptr<ImportableSource>, samplecnt_t rate, SrcQuality);
36 ~ResampledImportableSource ();
38 samplecnt_t read (Sample* buffer, samplecnt_t nframes);
39 float ratio() const { return _src_data.src_ratio; }
40 uint32_t channels() const { return source->channels(); }
41 samplecnt_t length() const { return source->length(); }
42 samplecnt_t samplerate() const { return source->samplerate(); }
43 void seek (samplepos_t);
44 samplepos_t natural_position() const;
46 bool clamped_at_unity () const {
47 /* resampling may generate inter-sample peaks with magnitude > 1 */
51 static const uint32_t blocksize;
54 boost::shared_ptr<ImportableSource> source;
57 SRC_STATE* _src_state;
64 #endif /* __ardour_resampled_source_h__ */