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94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
#ifndef MIDI_EVENT_H
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#define MIDI_EVENT_H
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#include <stdio.h>
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#include <stdlib.h>
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#include "helpers.h"
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namespace Midi {
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enum MidiMessageType {Midi = 0, MidiNoteOff = 0x8, MidiNoteOn, MidiPolyAftertouch,
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MidiControlChange, MidiProgramChange, MidiChannelAftertouch,
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MidiPitchWheel, MidiMetaEvent = 0xFF, MidiSysex1 = 0xF0, MidiSysex2 = 0xF7};
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enum MidiMetaType {MetaSequenceNumber = 0x0, MetaTextEvent = 0x1, MetaCopyright = 0x2,
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MetaTrackName = 0x3, MetaInstrumentName = 0x4, MetaLyricText = 0x5,
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MetaMarkerText = 0x6, MetaCuePoint = 0x7, MetaChannelPrefixAssignment = 0x20,
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MetaEndOfTrack = 0x2F, MetaTempoSetting = 0x51, MetaSMPTEOffset = 0x54,
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MetaTimeSignature = 0x58, MetaKeySignature = 0x59, MetaSequenceSpecific = 0x7F};
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/***
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* Spec:
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* MidiTrackEvent = <delta_time (Variable)> + <MidiEvent> | <MetaEvent> | <SysexEvent>
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* MidiEvent = <MidiMessageType (4 bits)> + <channel (4 bits)> + <parameter1 (1 byte)> <parameter2 (1 byte)>
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* MetaEvent = 0xFF + <MidiMetaType> + <size (Variable)> + <data>
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* SysexEvent = 0xF0 + <data> + 0xF7 -or-
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* SysexEvent = 0xF7 + <data> 0xF7
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***/
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class Event {
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private:
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unsigned int m_delta;
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unsigned int m_size;
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unsigned int m_data_size;
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unsigned char m_status;
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unsigned char m_meta_type;
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unsigned char m_parameter1;
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unsigned char m_parameter2;
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void *m_data;
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public:
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Event();
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Event(int delta, int status, int parameter1, int parameter2);
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void init_midi(int delta, int status, int parameter1, int parameter2);
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void init_from_file(FILE *fp, unsigned char last_status);
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~Event();
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// Some easy inline functions
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static bool is_status_byte(unsigned char byte) { return ((byte & 0x80) >> 7) == 1; }
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unsigned int delta() const { return m_delta; }
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unsigned char status() const { return m_status; }
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unsigned int bytes_read() const { return m_size; }
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unsigned char parameter1() const { return m_parameter1; }
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unsigned char parameter2() const { return m_parameter2; }
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int message_type() const { return (m_status &0xF0) >> 4; }
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int channel() const { return (m_status &0xF); }
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void *sysex_data() const { return m_data; }
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void print_yaml(){
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printf(" - :delta: 0x%X\n", m_delta);
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printf(" :status: 0x%X\n", m_status);
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switch(m_status){
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case 0xFF:
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printf(" :meta_type: 0x%X\n", m_meta_type);
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printf(" :meta_data_size: 0x%X\n", m_data_size);
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break;
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case 0xF0:
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case 0xF7:
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printf(" :sysex_data_size: %d\n", m_data_size);
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break;
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default:
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printf(" :parameter1: 0x%X\n", m_parameter1);
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printf(" :parameter2: 0x%X\n", m_parameter2);
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}
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/* Printing out the actual data as a string confuses the YAML parser
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* So let's just not do that.
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if(m_data){
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printf(" :data: \"");
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for(int i = 0; i < m_data_size; i++){
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printf("%c", ((unsigned char*)m_data)[i]);
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}
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printf("\"\n");
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}
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*/
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}
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};
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}
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#endif
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