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_silentfilesource_h__
21 #define __ardour_silentfilesource_h__
23 #include <ardour/audiofilesource.h>
27 class SilentFileSource : public AudioFileSource {
29 virtual ~SilentFileSource ();
31 int update_header (nframes_t when, struct tm&, time_t) { return 0; }
32 int flush_header () { return 0; }
33 float sample_rate () const { return _sample_rate; }
35 void set_length (nframes_t len);
37 int read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, double samples_per_unit) const {
38 memset (peaks, 0, sizeof (PeakData) * npeaks);
42 bool destructive() const { return false; }
48 SilentFileSource (Session&, const XMLNode&, nframes_t nframes, float sample_rate);
50 friend class SourceFactory;
52 nframes_t read_unlocked (Sample *dst, nframes_t start, nframes_t cnt) const {
53 memset (dst, 0, sizeof (Sample) * cnt);
57 nframes_t write_unlocked (Sample *dst, nframes_t cnt) { return 0; }
59 void set_header_timeline_position () {}
65 #endif /* __ardour_audiofilesource_h__ */