89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
/*
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* Copyright (C) 2017 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_raw_midi_parser_h_
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#define _ardour_raw_midi_parser_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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class LIBARDOUR_API RawMidiParser
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{
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public:
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RawMidiParser ();
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void reset () {
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_event_size = 0;
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_unbuffered_bytes = 0;
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_total_bytes = 0;
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_expected_bytes = 0;
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_status_byte = 0;
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}
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uint8_t const * midi_buffer () const { return _parser_buffer; }
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size_t buffer_size () const { return _event_size; }
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/** parse a MIDI byte
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* @return true if message is complete, false if more data is needed
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*/
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bool process_byte (const uint8_t byte);
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private:
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void record_byte (uint8_t byte) {
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if (_total_bytes < sizeof (_parser_buffer)) {
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_parser_buffer[_total_bytes] = byte;
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} else {
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++_unbuffered_bytes;
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}
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++_total_bytes;
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}
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void prepare_byte_event (const uint8_t byte) {
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_parser_buffer[0] = byte;
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_event_size = 1;
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}
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bool prepare_buffered_event () {
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const bool result = _unbuffered_bytes == 0;
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if (result) {
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_event_size = _total_bytes;
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}
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_total_bytes = 0;
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_unbuffered_bytes = 0;
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if (_status_byte >= 0xf0) {
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_expected_bytes = 0;
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_status_byte = 0;
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}
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return result;
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}
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size_t _event_size;
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size_t _unbuffered_bytes;
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size_t _total_bytes;
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size_t _expected_bytes;
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uint8_t _status_byte;
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uint8_t _parser_buffer[1024];
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};
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} // namespace ARDOUR
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#endif /* _ardour_raw_midi_parser_h_ */
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