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/*
Copyright (C) 2006, 2013 Paul Davis
Copyright (C) 2013, 2014 Robin Gareus <robin@gareus.org>
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_delayline_h__
#define __ardour_delayline_h__
#include <boost/shared_ptr.hpp>
#include <boost/shared_array.hpp>
#include "ardour/types.h"
#include "ardour/processor.h"
namespace ARDOUR {
class BufferSet;
class ChanCount;
class Session;
/** Meters peaks on the input and stores them for access.
*/
class LIBARDOUR_API DelayLine : public Processor {
public:
DelayLine (Session& s, const std::string& name);
~DelayLine ();
bool set_name (const std::string& str);
bool set_delay (samplecnt_t signal_delay);
samplecnt_t delay () { return _pending_delay; }
/* processor interface */
bool display_to_user () const { return false; }
void run (BufferSet&, samplepos_t, samplepos_t, double, pframes_t, bool);
bool configure_io (ChanCount in, ChanCount out);
bool can_support_io_configuration (const ChanCount& in, ChanCount& out);
void flush ();
protected:
XMLNode& state ();
private:
void allocate_pending_buffers (samplecnt_t, ChanCount const&);
void write_to_rb (Sample* rb, Sample* src, samplecnt_t); // honor _woff, _bsiz.
void read_from_rb (Sample* rb, Sample* dst, samplecnt_t); // honor _roff, _bsiz
friend class IO;
samplecnt_t _bsiz;
samplecnt_t _bsiz_mask;
samplecnt_t _delay, _pending_delay;
sampleoffset_t _roff, _woff;
bool _pending_flush;
typedef std::vector<boost::shared_array<Sample> > AudioDlyBuf;
typedef std::vector<boost::shared_array<MidiBuffer> > MidiDlyBuf;
AudioDlyBuf _buf;
boost::shared_ptr<MidiBuffer> _midi_buf;
#ifndef NDEBUG
Glib::Threads::Mutex _set_delay_mutex;
#endif
};
} // namespace ARDOUR
#endif // __ardour_meter_h__
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