56 lines
1.3 KiB
TypeScript
56 lines
1.3 KiB
TypeScript
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namespace pxsim.music {
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export function fromWAV(buf: RefBuffer) {
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return incr(buf)
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}
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export function stopAllSounds() {
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SoundMethods.stop()
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}
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}
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namespace pxsim.SoundMethods {
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let numSoundsPlaying = 0;
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const soundsLimit = 1;
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let audio: HTMLAudioElement;
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export function buffer(buf: RefBuffer) {
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return incr(buf)
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}
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export function uint8ArrayToString(input: Uint8Array) {
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let len = input.length;
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let res = ""
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for (let i = 0; i < len; ++i)
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res += String.fromCharCode(input[i]);
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return res;
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}
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export function play(buf: RefBuffer, volume: number) {
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if (!buf || numSoundsPlaying >= soundsLimit) {
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return Promise.resolve();
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}
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return new Promise<void>(resolve => {
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let url = "data:audio/wav;base64," + btoa(uint8ArrayToString(buf.data))
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audio = new Audio(url)
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audio.onended = () => {
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resolve();
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numSoundsPlaying--;
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}
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numSoundsPlaying++;
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audio.play()
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})
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}
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export function stop() {
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return new Promise<void>(resolve => {
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if (audio) {
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audio.pause();
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numSoundsPlaying--;
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}
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})
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}
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}
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