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import { getEvent, messageTypes } from "../../midi_parser/midi_message.js";
import { WorkletSequencerReturnMessageType } from "./sequencer_message.js";
import { consoleColors } from "../../utils/other.js";
import { SpessaSynthWarn } from "../../utils/loggin.js";
import { readBytesAsUintBigEndian } from "../../utils/byte_functions/big_endian.js";
/**
* Processes a single event
* @param event {MIDIMessage}
* @param trackIndex {number}
* @this {WorkletSequencer}
* @private
*/
export function _processEvent(event, trackIndex)
{
if (this.sendMIDIMessages)
{
if (event.messageStatusByte >= 0x80)
{
this.sendMIDIMessage([event.messageStatusByte, ...event.messageData]);
return;
}
}
const statusByteData = getEvent(event.messageStatusByte);
const offset = this.midiPortChannelOffsets[this.midiPorts[trackIndex]] || 0;
statusByteData.channel += offset;
// process the event
switch (statusByteData.status)
{
case messageTypes.noteOn:
const velocity = event.messageData[1];
if (velocity > 0)
{
this.synth.noteOn(statusByteData.channel, event.messageData[0], velocity);
this.playingNotes.push({
midiNote: event.messageData[0],
channel: statusByteData.channel,
velocity: velocity
});
}
else
{
this.synth.noteOff(statusByteData.channel, event.messageData[0]);
const toDelete = this.playingNotes.findIndex(n =>
n.midiNote === event.messageData[0] && n.channel === statusByteData.channel);
if (toDelete !== -1)
{
this.playingNotes.splice(toDelete, 1);
}
}
break;
case messageTypes.noteOff:
this.synth.noteOff(statusByteData.channel, event.messageData[0]);
const toDelete = this.playingNotes.findIndex(n =>
n.midiNote === event.messageData[0] && n.channel === statusByteData.channel);
if (toDelete !== -1)
{
this.playingNotes.splice(toDelete, 1);
}
break;
case messageTypes.pitchBend:
this.synth.pitchWheel(statusByteData.channel, event.messageData[1], event.messageData[0]);
break;
case messageTypes.controllerChange:
// empty tracks cannot cc change
if (this.midiData.isMultiPort && this.midiData.usedChannelsOnTrack[trackIndex].size === 0)
{
return;
}
this.synth.controllerChange(statusByteData.channel, event.messageData[0], event.messageData[1]);
break;
case messageTypes.programChange:
// empty tracks cannot program change
if (this.midiData.isMultiPort && this.midiData.usedChannelsOnTrack[trackIndex].size === 0)
{
return;
}
this.synth.programChange(statusByteData.channel, event.messageData[0]);
break;
case messageTypes.polyPressure:
this.synth.polyPressure(statusByteData.channel, event.messageData[0], event.messageData[1]);
break;
case messageTypes.channelPressure:
this.synth.channelPressure(statusByteData.channel, event.messageData[0]);
break;
case messageTypes.systemExclusive:
this.synth.systemExclusive(event.messageData, offset);
break;
case messageTypes.setTempo:
event.messageData.currentIndex = 0;
let tempoBPM = 60000000 / readBytesAsUintBigEndian(event.messageData, 3);
this.oneTickToSeconds = 60 / (tempoBPM * this.midiData.timeDivision);
if (this.oneTickToSeconds === 0)
{
this.oneTickToSeconds = 60 / (120 * this.midiData.timeDivision);
SpessaSynthWarn("invalid tempo! falling back to 120 BPM");
tempoBPM = 120;
}
break;
// recognized but ignored
case messageTypes.timeSignature:
case messageTypes.endOfTrack:
case messageTypes.midiChannelPrefix:
case messageTypes.songPosition:
case messageTypes.activeSensing:
case messageTypes.keySignature:
case messageTypes.sequenceNumber:
case messageTypes.sequenceSpecific:
case messageTypes.text:
case messageTypes.lyric:
case messageTypes.copyright:
case messageTypes.trackName:
case messageTypes.marker:
case messageTypes.cuePoint:
case messageTypes.instrumentName:
case messageTypes.programName:
break;
case messageTypes.midiPort:
this.assignMIDIPort(trackIndex, event.messageData[0]);
break;
case messageTypes.reset:
this.synth.stopAllChannels();
this.synth.resetAllControllers();
break;
default:
SpessaSynthWarn(
`%cUnrecognized Event: %c${event.messageStatusByte}%c status byte: %c${Object.keys(
messageTypes).find(k => messageTypes[k] === statusByteData.status)}`,
consoleColors.warn,
consoleColors.unrecognized,
consoleColors.warn,
consoleColors.value
);
break;
}
if (statusByteData.status >= 0 && statusByteData.status < 0x80)
{
this.post(
WorkletSequencerReturnMessageType.metaEvent,
[event, trackIndex]
);
}
}
/**
* Adds 16 channels to the synth
* @this {WorkletSequencer}
* @private
*/
export function _addNewMidiPort()
{
for (let i = 0; i < 16; i++)
{
this.synth.createWorkletChannel(true);
}
} |