126 lines
3.2 KiB
TypeScript
126 lines
3.2 KiB
TypeScript
import { PrismaClient } from "@prisma/client";
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import LCD from "raspberrypi-liquid-crystal";
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import fs from "node:fs";
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import * as WavFileDecoder from "wav-file-decoder";
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const timer = (ms: number) => new Promise((res) => setTimeout(res, ms));
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const prisma = new PrismaClient();
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const getStanza = async (register: string) => {
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const stanzaCount = await prisma.stanza.count({ where: { register } });
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const skip = Math.floor(Math.random() * stanzaCount);
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const randomStanza = await prisma.stanza.findMany({
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skip: skip,
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take: 1,
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where: {
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register,
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},
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});
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if (!randomStanza || !randomStanza[0].text) {
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console.log(
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register,
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stanzaCount,
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skip,
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randomStanza,
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"no stanza found in db"
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);
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// try one more time
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const anotherStanzaTry = await prisma.stanza.findMany({
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skip: skip,
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take: 1,
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where: {
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register,
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},
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});
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return anotherStanzaTry[0].text as string;
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}
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return randomStanza[0].text as string;
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};
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// Play portal wave PCM data and set bands
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// This file has been downsampled to 1000hz (1,000 samples per second)
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const fileData = fs.readFileSync("/home/grace/portal/blackportal1000.wav");
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const wavFileInfo = WavFileDecoder.getWavFileInfo(fileData);
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const audioData = WavFileDecoder.decodeWavFile(fileData);
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const totalSamples = wavFileInfo.chunkInfo.filter(
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(ci) => ci.chunkId === "data"
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)[0].dataLength;
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let sample = 0;
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let register = "high";
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let count = 0;
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setInterval(() => {
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const absSample = Math.abs(audioData.channelData[0][count]);
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if (count == totalSamples - 1) {
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count = 0;
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console.log("total samples reached");
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} else {
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count++;
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}
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register = "high";
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if (absSample < 0.01) {
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register = "mid";
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}
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if (absSample < 0.001) {
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register = "low";
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}
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sample = absSample;
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}, 1);
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// Setup lcd screen
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const lcd = new LCD(1, 0x27, 16, 2);
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lcd.beginSync();
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lcd.clearSync();
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const TICK = 250;
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const WAIT = 10;
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// Play bottom line
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const tag =
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" Black Portal 4856 E Davison, Detroit ";
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let tagCharacterLocation = 0;
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setInterval(() => {
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lcd.printLineSync(1, " ");
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setTimeout(() => {
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lcd.printLineSync(1, tag.substring(tagCharacterLocation, tag.length));
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}, WAIT);
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tagCharacterLocation++;
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if (tagCharacterLocation > tag.length) {
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tagCharacterLocation = 0;
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}
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}, TICK);
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let characterLocation = 0;
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let stanzaText = "";
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let endBuffer = "";
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let totalTicks = 0;
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// Play top line
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while (true) {
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if (characterLocation == totalTicks) {
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characterLocation = 0;
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stanzaText = await getStanza(register);
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endBuffer =
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stanzaText.length > 16 ? "" : Array(16 - stanzaText.length).join(" ");
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totalTicks = stanzaText.length + endBuffer.length;
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}
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if (!stanzaText) {
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console.log("no stanza text in stanza scroller");
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}
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lcd.printLineSync(0, " ");
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setTimeout(() => {
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lcd.printLineSync(
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0,
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`${
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characterLocation < 16 ? Array(16 - characterLocation).join(" ") : ""
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}${stanzaText + endBuffer}`.substring(characterLocation, totalTicks)
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);
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}, WAIT);
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await timer(TICK);
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characterLocation++;
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}
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