85 lines
2.7 KiB
JavaScript
85 lines
2.7 KiB
JavaScript
import { PrismaClient } from "@prisma/client";
|
|
import LCD from "raspberrypi-liquid-crystal";
|
|
import fs from "node:fs";
|
|
import * as WavFileDecoder from "wav-file-decoder";
|
|
const timer = (ms) => new Promise((res) => setTimeout(res, ms));
|
|
const prisma = new PrismaClient();
|
|
const getStanza = async (register) => {
|
|
const stanzaCount = await prisma.stanza.count({ where: { register } });
|
|
const skip = Math.floor(Math.random() * stanzaCount);
|
|
const randomStanza = await prisma.stanza.findMany({
|
|
skip: skip,
|
|
take: 1,
|
|
where: {
|
|
register,
|
|
},
|
|
});
|
|
return randomStanza[0].text;
|
|
};
|
|
// Play portal wave PCM data and set bands
|
|
const fileData = fs.readFileSync("/home/grace/blackportal1000.wav");
|
|
const wavFileInfo = WavFileDecoder.getWavFileInfo(fileData);
|
|
const audioData = WavFileDecoder.decodeWavFile(fileData);
|
|
const totalSamples = wavFileInfo.chunkInfo.filter((ci) => ci.chunkId === "data")[0].dataLength;
|
|
let sample = 0;
|
|
let register = "high";
|
|
let count = 0;
|
|
setInterval(() => {
|
|
const absSample = Math.abs(audioData.channelData[0][count]);
|
|
if (count > totalSamples) {
|
|
count = 0;
|
|
}
|
|
else {
|
|
count++;
|
|
}
|
|
register = "high";
|
|
if (absSample < 0.01) {
|
|
register = "mid";
|
|
}
|
|
if (absSample < 0.001) {
|
|
register = "low";
|
|
}
|
|
sample = absSample;
|
|
}, 1);
|
|
const lcd = new LCD(1, 0x27, 16, 2);
|
|
lcd.beginSync();
|
|
lcd.clearSync();
|
|
const TICK = 250;
|
|
const WAIT = 10;
|
|
// Play bottom line
|
|
const tag = " Black Portal 4856 E Davison, Detroit ";
|
|
let tagCharacterLocation = 0;
|
|
setInterval(() => {
|
|
lcd.printLineSync(1, " ");
|
|
setTimeout(() => {
|
|
lcd.printLineSync(1, tag.substring(tagCharacterLocation, 16 + tagCharacterLocation));
|
|
}, WAIT);
|
|
tagCharacterLocation++;
|
|
if (tagCharacterLocation > tag.length) {
|
|
tagCharacterLocation = 0;
|
|
}
|
|
}, TICK);
|
|
// Play top line
|
|
const playNewStanza = async () => {
|
|
let stanza = await getStanza(register);
|
|
let stanzaWaitTimeout;
|
|
let stanzaCharacterLocation = 0;
|
|
const scrollStanza = async () => {
|
|
lcd.printLineSync(0, " ");
|
|
stanzaWaitTimeout = setTimeout(() => {
|
|
lcd.printLineSync(0, `${16 - stanzaCharacterLocation > 0
|
|
? Array(16 - stanzaCharacterLocation).join(" ")
|
|
: ""}${stanza}`.substring(stanzaCharacterLocation, stanza.length));
|
|
}, WAIT);
|
|
await timer(TICK);
|
|
stanzaCharacterLocation++;
|
|
if (stanzaCharacterLocation === stanza.length) {
|
|
playNewStanza();
|
|
}
|
|
else {
|
|
scrollStanza();
|
|
}
|
|
};
|
|
scrollStanza();
|
|
};
|
|
playNewStanza();
|