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import {
ALL_CHANNELS_OR_DIFFERENT_ACTION,
returnMessageType
} from "../../synthetizer/worklet_system/message_protocol/worklet_message.js";
import { SongChangeType, WorkletSequencerMessageType, WorkletSequencerReturnMessageType } from "./sequencer_message.js";
import { messageTypes, midiControllers } from "../../midi_parser/midi_message.js";
import { MIDI_CHANNEL_COUNT } from "../../synthetizer/synth_constants.js";
/**
* @param messageType {WorkletSequencerMessageType}
* @param messageData {any}
* @this {WorkletSequencer}
*/
export function processMessage(messageType, messageData)
{
switch (messageType)
{
default:
break;
case WorkletSequencerMessageType.loadNewSongList:
this.loadNewSongList(messageData[0], messageData[1]);
break;
case WorkletSequencerMessageType.pause:
this.pause();
break;
case WorkletSequencerMessageType.play:
this.play(messageData);
break;
case WorkletSequencerMessageType.stop:
this.stop();
break;
case WorkletSequencerMessageType.setTime:
this.currentTime = messageData;
break;
case WorkletSequencerMessageType.changeMIDIMessageSending:
this.sendMIDIMessages = messageData;
break;
case WorkletSequencerMessageType.setPlaybackRate:
this.playbackRate = messageData;
break;
case WorkletSequencerMessageType.setLoop:
const [loop, count] = messageData;
this.loop = loop;
if (count === ALL_CHANNELS_OR_DIFFERENT_ACTION)
{
this.loopCount = Infinity;
}
else
{
this.loopCount = count;
}
break;
case WorkletSequencerMessageType.changeSong:
switch (messageData[0])
{
case SongChangeType.forwards:
this.nextSong();
break;
case SongChangeType.backwards:
this.previousSong();
break;
case SongChangeType.shuffleOff:
this.shuffleMode = false;
this.songIndex = this.shuffledSongIndexes[this.songIndex];
break;
case SongChangeType.shuffleOn:
this.shuffleMode = true;
this.shuffleSongIndexes();
this.songIndex = 0;
this.loadCurrentSong();
break;
case SongChangeType.index:
this.songIndex = messageData[1];
this.loadCurrentSong();
break;
}
break;
case WorkletSequencerMessageType.getMIDI:
this.post(WorkletSequencerReturnMessageType.getMIDI, this.midiData);
break;
case WorkletSequencerMessageType.setSkipToFirstNote:
this.skipToFirstNoteOn = messageData;
break;
case WorkletSequencerMessageType.setPreservePlaybackState:
this.preservePlaybackState = messageData;
}
}
/**
*
* @param messageType {WorkletSequencerReturnMessageType}
* @param messageData {any}
* @this {WorkletSequencer}
*/
export function post(messageType, messageData = undefined)
{
if (!this.synth.enableEventSystem)
{
return;
}
this.synth.post({
messageType: returnMessageType.sequencerSpecific,
messageData: {
messageType: messageType,
messageData: messageData
}
});
}
/**
* @param message {number[]}
* @this {WorkletSequencer}
*/
export function sendMIDIMessage(message)
{
this.post(WorkletSequencerReturnMessageType.midiEvent, message);
}
/**
* @this {WorkletSequencer}
* @param channel {number}
* @param type {number}
* @param value {number}
*/
export function sendMIDICC(channel, type, value)
{
channel %= 16;
if (!this.sendMIDIMessages)
{
return;
}
this.sendMIDIMessage([messageTypes.controllerChange | channel, type, value]);
}
/**
* @this {WorkletSequencer}
* @param channel {number}
* @param program {number}
*/
export function sendMIDIProgramChange(channel, program)
{
channel %= 16;
if (!this.sendMIDIMessages)
{
return;
}
this.sendMIDIMessage([messageTypes.programChange | channel, program]);
}
/**
* Sets the pitch of the given channel
* @this {WorkletSequencer}
* @param channel {number} usually 0-15: the channel to change pitch
* @param MSB {number} SECOND byte of the MIDI pitchWheel message
* @param LSB {number} FIRST byte of the MIDI pitchWheel message
*/
export function sendMIDIPitchWheel(channel, MSB, LSB)
{
channel %= 16;
if (!this.sendMIDIMessages)
{
return;
}
this.sendMIDIMessage([messageTypes.pitchBend | channel, LSB, MSB]);
}
/**
* @this {WorkletSequencer}
*/
export function sendMIDIReset()
{
if (!this.sendMIDIMessages)
{
return;
}
this.sendMIDIMessage([messageTypes.reset]);
for (let ch = 0; ch < MIDI_CHANNEL_COUNT; ch++)
{
this.sendMIDIMessage([messageTypes.controllerChange | ch, midiControllers.allSoundOff, 0]);
this.sendMIDIMessage([messageTypes.controllerChange | ch, midiControllers.resetAllControllers, 0]);
}
} |