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__
24 #include "ardour/audiofilesource.h"
28 class LIBARDOUR_API SilentFileSource : public AudioFileSource {
30 int update_header (framepos_t /*when*/, struct tm&, time_t) { return 0; }
31 int flush_header () { return 0; }
32 float sample_rate () const { return _sample_rate; }
34 void set_length (framecnt_t len) { _length = len; }
37 bool destructive() const { return false; }
38 bool can_be_analysed() const { return false; }
40 bool clamped_at_unity() const { return false; }
44 friend class SourceFactory;
46 SilentFileSource (Session& s, const XMLNode& x, framecnt_t len, float srate)
48 , AudioFileSource (s, x, false)
54 framecnt_t read_unlocked (Sample *dst, framepos_t /*start*/, framecnt_t cnt) const {
55 memset (dst, 0, sizeof (Sample) * cnt);
59 framecnt_t write_unlocked (Sample */*dst*/, framecnt_t /*cnt*/) { return 0; }
61 void set_header_timeline_position () {}
63 int read_peaks_with_fpp (PeakData *peaks, framecnt_t npeaks, framepos_t /*start*/, framecnt_t /*cnt*/,
64 double /*frames_per_pixel*/, framecnt_t /*fpp*/) const {
65 memset (peaks, 0, sizeof (PeakData) * npeaks);
74 #endif /* __ardour_audiofilesource_h__ */