72 lines
2 KiB
C++
72 lines
2 KiB
C++
#include "MidiChannelEventAdapter.h"
|
|
|
|
#include "BinaryStream.h"
|
|
#include "ByteUtils.h"
|
|
|
|
#include <iostream>
|
|
#include <bitset>
|
|
|
|
int MidiChannelEventAdapter::readEvent(std::ifstream* file, char firstByte, MidiChannelEvent* event, MidiChannelEvent::Type& lastEventType)
|
|
{
|
|
int first_four_bits = 0xF0;
|
|
int second_four_bits = 0xF;
|
|
int event_type = (firstByte & first_four_bits) >> 4;
|
|
int midi_channel = (firstByte & second_four_bits) >> 4;
|
|
unsigned byteCount = 0;
|
|
//std::cout << "Channel: " << midi_channel << std::endl;
|
|
|
|
const bool isStatusByte = ByteUtils::MostSignificantBitIsOne(firstByte);
|
|
if(isStatusByte)
|
|
{
|
|
event->SetTypeAndChannel(firstByte);
|
|
lastEventType = event->GetType();
|
|
}
|
|
else
|
|
{
|
|
event->SetType(lastEventType);
|
|
}
|
|
//std::cout << "MC Type " << static_cast<int>(event->GetType()) << std::endl;
|
|
switch(event->GetType())
|
|
{
|
|
case MidiChannelEvent::Type::NOTE_ON:
|
|
case MidiChannelEvent::Type::NOTE_OFF:
|
|
case MidiChannelEvent::Type::CONTROLLER:
|
|
{
|
|
if (isStatusByte)
|
|
{
|
|
byteCount += readEventData(file, event);
|
|
}
|
|
else
|
|
{
|
|
byteCount += readEventData(file, event, firstByte);
|
|
}
|
|
break;
|
|
}
|
|
case MidiChannelEvent::Type::PROGRAM:
|
|
{
|
|
int value0 = *BinaryStream::getNextByteAsInt(file);
|
|
byteCount ++;
|
|
break;
|
|
}
|
|
default:
|
|
//std::cout << "Unknown status event: " << std::bitset<8>(firstByte) << "|" << event_type <<std::endl;
|
|
break;
|
|
}
|
|
return byteCount;
|
|
}
|
|
|
|
int MidiChannelEventAdapter::readEventData(std::ifstream* file, MidiChannelEvent* event, char c)
|
|
{
|
|
int value0 = int(c);
|
|
int value1 = *BinaryStream::getNextByteAsInt(file);
|
|
event->SetValues(value0, value1);
|
|
return 1;
|
|
}
|
|
|
|
int MidiChannelEventAdapter::readEventData(std::ifstream* file, MidiChannelEvent* event)
|
|
{
|
|
int value0 = *BinaryStream::getNextByteAsInt(file);
|
|
int value1 = *BinaryStream::getNextByteAsInt(file);
|
|
event->SetValues(value0, value1);
|
|
return 2;
|
|
}
|