82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
/*
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* Copyright (C) 2020 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _ardour_circular_buffer_h_
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#define _ardour_circular_buffer_h_
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#include <atomic>
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#include "pbd/ringbuffer.h"
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#include "ardour/libardour_visibility.h"
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#include "ardour/types.h"
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namespace ARDOUR {
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/** Endless ringbuffer
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*
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* Writing never fails, and may flush out old data.
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* This is intended for an oscilloscope waveform view.
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*/
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class LIBARDOUR_API CircularSampleBuffer
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{
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public:
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CircularSampleBuffer (samplecnt_t size);
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void silence (samplecnt_t);
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void write (Sample const*, samplecnt_t);
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bool read (Sample& s_min, Sample& s_max, samplecnt_t n_samples);
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private:
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PBD::RingBuffer<Sample> _rb;
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CircularSampleBuffer (CircularSampleBuffer const&);
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};
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class LIBARDOUR_API CircularEventBuffer
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{
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public:
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struct Event {
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/* up to 3 byte MIDI events, 32bit aligned */
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Event (uint8_t const* buf = 0, size_t sz = 0);
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uint8_t data[3];
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uint8_t pad;
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};
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typedef std::vector<Event> EventList;
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CircularEventBuffer (samplecnt_t size);
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~CircularEventBuffer ();
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void reset ();
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void write (uint8_t const*, size_t);
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bool read (EventList&);
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private:
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CircularEventBuffer (CircularEventBuffer const&);
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Event* _buf;
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guint _size;
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guint _size_mask;
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std::atomic<int> _idx;
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std::atomic<int> _ack;
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};
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}
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#endif
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