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/*
Copyright (C) 2007 Paul Davis
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_silentfilesource_h__
#define __ardour_silentfilesource_h__
#include <cstring>
#include "ardour/audiofilesource.h"
namespace ARDOUR {
class SilentFileSource : public AudioFileSource {
public:
int update_header (framepos_t /*when*/, struct tm&, time_t) { return 0; }
int flush_header () { return 0; }
float sample_rate () const { return _sample_rate; }
void set_length (framecnt_t len) { _length = len; }
void flush () {}
bool destructive() const { return false; }
bool can_be_analysed() const { return false; }
bool clamped_at_unity() const { return false; }
protected:
friend class SourceFactory;
SilentFileSource (Session& s, const XMLNode& x, framecnt_t len, float srate)
: Source (s, x)
, AudioFileSource (s, x, false)
, _sample_rate(srate)
{
_length = len;
}
framecnt_t read_unlocked (Sample *dst, framepos_t /*start*/, framecnt_t cnt) const {
memset (dst, 0, sizeof (Sample) * cnt);
return cnt;
}
framecnt_t write_unlocked (Sample */*dst*/, framecnt_t /*cnt*/) { return 0; }
void set_header_timeline_position () {}
int read_peaks_with_fpp (PeakData *peaks, framecnt_t npeaks, framepos_t /*start*/, framecnt_t /*cnt*/,
double /*frames_per_pixel*/, framecnt_t /*fpp*/) const {
memset (peaks, 0, sizeof (PeakData) * npeaks);
return 0;
}
float _sample_rate;
};
} // namespace ARDOUR
#endif /* __ardour_audiofilesource_h__ */
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