142 lines
3.4 KiB
C++
142 lines
3.4 KiB
C++
/*
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* Copyright (C) 2007-2016 David Robillard <d@drobilla.net>
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* Copyright (C) 2007-2018 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2009-2010 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2009 Hans Baier <hansfbaier@googlemail.com>
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* Copyright (C) 2014-2016 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_rt_midi_buffer_h__
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#define __ardour_rt_midi_buffer_h__
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#include <map>
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#include <glibmm/threads.h>
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#include "evoral/Event.h"
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#include "evoral/EventSink.h"
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#include "evoral/midi_util.h"
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#include "ardour/types.h"
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namespace ARDOUR {
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class MidiBuffer;
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class MidiNoteTracker;
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/** */
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class LIBARDOUR_API RTMidiBuffer : public Evoral::EventSink<samplepos_t>
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{
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private:
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struct Blob {
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uint32_t size;
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uint8_t data[0];
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};
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public:
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typedef samplepos_t TimeType;
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RTMidiBuffer ();
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~RTMidiBuffer();
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void clear();
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void resize(size_t);
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size_t size() const { return _size; }
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bool empty() const { return _size == 0; }
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samplecnt_t span() const;
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uint32_t write (TimeType time, Evoral::EventType type, uint32_t size, const uint8_t* buf);
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uint32_t read (MidiBuffer& dst, samplepos_t start, samplepos_t end, MidiNoteTracker& tracker, samplecnt_t offset = 0);
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void dump (uint32_t);
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void reverse ();
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bool reversed() const;
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struct Item {
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samplepos_t timestamp;
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union {
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uint8_t bytes[4];
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uint32_t offset;
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};
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};
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Item const & operator[](size_t n) const {
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if (n >= _size) {
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throw std::exception ();
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}
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return _data[n];
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}
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uint8_t const * bytes (Item const & item, uint32_t& size) {
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if (!item.bytes[0]) {
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size = Evoral::midi_event_size (item.bytes[1]);
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return &item.bytes[1];
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} else {
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uint32_t offset = item.offset & ~(1<<(CHAR_BIT-1));
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Blob* blob = reinterpret_cast<Blob*> (&_pool[offset]);
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size = blob->size;
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return blob->data;
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}
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}
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void shift (sampleoffset_t distance) {
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if (_size == 0) {
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return;
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}
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for (size_t n = 0; n < _size; ++n) {
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_data[n].timestamp += distance;
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}
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}
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private:
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friend struct WriteProtectRender;
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/* The main store. Holds Items (timestamp+up to 3 bytes of data OR
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* offset into secondary storage below)
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*/
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size_t _size;
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size_t _capacity;
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Item* _data;
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bool _reversed;
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/* secondary blob storage. Holds Blobs (arbitrary size + data) */
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uint32_t alloc_blob (uint32_t size);
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uint32_t store_blob (uint32_t size, uint8_t const * data);
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uint32_t _pool_size;
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uint32_t _pool_capacity;
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uint8_t* _pool;
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Glib::Threads::RWLock _lock;
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public:
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class WriteProtectRender {
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public:
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WriteProtectRender (RTMidiBuffer& rtm) : lm (rtm._lock, Glib::Threads::NOT_LOCK) {}
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void acquire () { lm.acquire(); }
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private:
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Glib::Threads::RWLock::WriterLock lm;
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};
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};
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} // namespace ARDOUR
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#endif // __ardour_rt_midi_buffer_h__
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