mirror of
https://github.com/davedoesdev/streamana.git
synced 2024-08-20 23:27:41 +08:00
618 lines
23 KiB
JavaScript
618 lines
23 KiB
JavaScript
import { GlCanvas } from './gl-canvas.js';
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import {
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HLS,
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video_encoder_codec,
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videoBitsPerSecond
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} from './hls.js';
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import shader from './example-shader.js';
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import {
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supported_video_encoder_configs,
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max_video_encoder_config,
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} from './resolution.js';
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const target_frame_rate = 30;
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const ingestion_url_el = document.getElementById('ingestion-url');
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ingestion_url_el.value = localStorage.getItem('streamana-example-ingestion-url');
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const go_live_el = document.getElementById('go-live');
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go_live_el.disabled = false;
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go_live_el.addEventListener('click', function () {
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if (this.checked) {
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start();
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} else {
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stop();
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}
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});
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let canvas_el = document.getElementById('canvas');
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const canvas_el_parent = canvas_el.parentNode;
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const canvas_proto = canvas_el.cloneNode();
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const waiting_el = document.getElementById('waiting');
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const error_alert_el = document.getElementById('error-alert');
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const error_alert_el_parent = error_alert_el.parentNode;
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const error_alert_el_nextSibling = error_alert_el.nextSibling;
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error_alert_el_parent.removeChild(error_alert_el);
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const ffmpeg_lib_url_el = document.getElementById('ffmpeg-lib-url');
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const initial_ffmpeg_lib_url = (localStorage.getItem('streamana-ffmpeg-lib-url') || '').trim();
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if (initial_ffmpeg_lib_url) {
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ffmpeg_lib_url_el.value = initial_ffmpeg_lib_url;
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}
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ffmpeg_lib_url_el.addEventListener('input', function () {
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localStorage.setItem('streamana-ffmpeg-lib-url', this.value);
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});
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const zoom_video_el = document.getElementById('zoom-video');
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zoom_video_el.checked = !!localStorage.getItem('streamana-zoom-video');
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zoom_video_el.addEventListener('input', function () {
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localStorage.setItem('streamana-zoom-video', this.checked ? 'true' : '');
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});
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const lock_portrait_el = document.getElementById('lock-portrait');
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lock_portrait_el.checked = !!localStorage.getItem('streamana-lock-portrait');
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lock_portrait_el.addEventListener('input', function () {
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localStorage.setItem('streamana-lock-portrait', this.checked ? 'true' : '');
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});
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const greyscale_el = document.getElementById('greyscale');
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greyscale_el.checked = !!localStorage.getItem('streamana-greyscale');
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greyscale_el.addEventListener('input', function () {
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localStorage.setItem('streamana-greyscale', this.checked ? 'true' : '');
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});
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let facing_mode = localStorage.getItem('streamana-facing-mode') || 'user';
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const reset_audio_el = document.getElementById('reset-audio');
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reset_audio_el.checked = !!localStorage.getItem('streamana-reset-audio');
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reset_audio_el.addEventListener('change', function () {
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localStorage.setItem('streamana-reset-audio', this.checked ? 'true' : '');
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});
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function collapse_nav() {
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const collapse = bootstrap.Collapse.getInstance(document.getElementById('navbarToggleExternalContent'));
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if (collapse) {
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collapse.hide();
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}
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}
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document.body.addEventListener('click', function (ev) {
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if ((ev.target === document.body) ||
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(ev.target === canvas_el_parent) ||
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(ev.target.parentNode === canvas_el_parent)) {
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collapse_nav();
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}
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});
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const mic_el = document.getElementById('mic');
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const mic_icon_el = document.getElementById('mic-icon');
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if (!!localStorage.getItem('streamana-mic-on')) {
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mic_icon_el.classList.remove('off');
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}
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mic_el.addEventListener('click', function () {
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mic_icon_el.classList.toggle('off');
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});
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function mic_save() {
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localStorage.setItem('streamana-mic-on', mic_icon_el.classList.contains('off') ? '' : 'true');
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}
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mic_el.addEventListener('click', mic_save);
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const camera_el = document.getElementById('camera');
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const camera_icon_el = document.getElementById('camera-icon');
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if (!!localStorage.getItem('streamana-camera-on')) {
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camera_icon_el.classList.remove('off');
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}
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camera_el.addEventListener('click', function () {
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camera_icon_el.classList.toggle('off');
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});
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function camera_save() {
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localStorage.setItem('streamana-camera-on', camera_icon_el.classList.contains('off') ? '' : 'true');
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}
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camera_el.addEventListener('click', camera_save);
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const camera_swap_el = document.getElementById('camera-swap');
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let video_encoder_config;
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let preferred_resolution = localStorage.getItem('streamana-resolution');
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if (preferred_resolution) {
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video_encoder_config = await max_video_encoder_config({
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...JSON.parse(preferred_resolution),
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codec: video_encoder_codec,
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bitrate: videoBitsPerSecond
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});
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}
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if (!video_encoder_config) {
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video_encoder_config = await max_video_encoder_config({
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width: 1280,
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height: 720,
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ratio: 16/9,
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codec: video_encoder_codec,
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bitrate: videoBitsPerSecond
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});
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}
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const resolution_el = document.getElementById('resolution');
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const video_encoder_configs = new Map();
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for (let config of (await supported_video_encoder_configs({
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codec: video_encoder_codec,
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bitrate: videoBitsPerSecond
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})).filter(c => c.ratio >= 1)) {
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const option = document.createElement('option');
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option.innerHTML = `${config.width}x${config.height} — ${config.label}`;
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option.selected = config.label === video_encoder_config.label;
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resolution_el.appendChild(option);
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video_encoder_configs.set(option.innerText, config);
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}
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resolution_el.addEventListener('change', function (ev) {
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video_encoder_config = video_encoder_configs.get(this.value);
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localStorage.setItem('streamana-resolution', JSON.stringify({
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width: video_encoder_config.width,
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height: video_encoder_config.height,
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ratio: video_encoder_config.ratio
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}));
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});
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let hls;
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async function start() {
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const ingestion_url = ingestion_url_el.value.trim();
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if (!ingestion_url) {
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go_live_el.checked = false;
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return;
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}
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localStorage.setItem('streamana-example-ingestion-url', ingestion_url);
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const ffmpeg_lib_url = ffmpeg_lib_url_el.value.trim() ||
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ffmpeg_lib_url_el.placeholder.trim();
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go_live_el.disabled = true;
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ingestion_url_el.disabled = true;
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ingestion_url_el.parentNode.classList.add('d-none');
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ffmpeg_lib_url_el.disabled = true;
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lock_portrait_el.disabled = true;
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zoom_video_el.disabled = true;
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reset_audio_el.disabled = true;
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resolution_el.disabled = true;
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waiting_el.classList.remove('d-none');
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mic_el.removeEventListener('click', mic_save);
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camera_el.removeEventListener('click', camera_save);
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collapse_nav();
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canvas_el_parent.removeChild(canvas_el);
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canvas_el = canvas_proto.cloneNode();
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canvas_el.classList.add('invisible');
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canvas_el_parent.appendChild(canvas_el);
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if (error_alert_el.parentNode) {
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error_alert_el_parent.removeChild(error_alert_el);
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}
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// get aspect ratio of encoder
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console.log(`encoder resolution: ${video_encoder_config.width}x${video_encoder_config.height}`);
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const ar_encoder = video_encoder_config.ratio;
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const ar_encoder_inv = 1/ar_encoder;
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const zoom_video = zoom_video_el.checked;
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const lock_portrait = /*screen.orientation.type.startsWith('portrait') &&*/ lock_portrait_el.checked;
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let video_el, camera_on = false, silence, audio_source, audio_dest, gl_canvas, canvas_stream, camera_stream, done = false;
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function cleanup(err) {
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if (err) {
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console.error(err);
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}
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if (done) {
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return;
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}
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done = true;
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mic_el.removeEventListener('click', mic_toggle);
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if (!!localStorage.getItem('streamana-mic-on')) {
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mic_icon_el.classList.remove('off');
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} else {
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mic_icon_el.classList.add('off');
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}
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mic_el.addEventListener('click', mic_save);
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camera_el.removeEventListener('click', camera_toggle);
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if (!!localStorage.getItem('streamana-camera-on')) {
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camera_icon_el.classList.remove('off');
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} else {
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camera_icon_el.classList.add('off');
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}
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camera_el.addEventListener('click', camera_save);
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greyscale_el.removeEventListener('input', greyscale);
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camera_swap_el.classList.add('d-none');
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camera_swap_el.removeEventListener('click', about_face);
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canvas_el_parent.classList.add('mx-auto');
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if (lock_portrait) {
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screen.orientation.unlock();
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if (document.fullscreenElement) {
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document.exitFullscreen();
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}
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}
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if (err) {
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error_alert_el_parent.insertBefore(error_alert_el, error_alert_el_nextSibling);
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error_alert_el.classList.add('show');
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}
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if (audio_source) {
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audio_source.disconnect();
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}
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if (silence) {
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silence.stop();
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}
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if (camera_stream) {
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for (let track of camera_stream.getTracks()) {
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track.stop();
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}
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}
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if (gl_canvas) {
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gl_canvas.destroy();
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}
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if (canvas_stream) {
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for (let track of canvas_stream.getTracks()) {
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track.stop();
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}
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}
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if (hls) {
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hls.end(!!err);
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}
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go_live_el.checked = false;
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go_live_el.disabled = false;
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ingestion_url_el.disabled = false;
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ingestion_url_el.parentNode.classList.remove('d-none');
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ffmpeg_lib_url_el.disabled = false;
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lock_portrait_el.disabled = false;
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zoom_video_el.disabled = false;
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reset_audio_el.disabled = false;
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resolution_el.disabled = false;
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waiting_el.classList.add('d-none');
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canvas_el.classList.add('d-none');
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}
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function update() {
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// update the canvas
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if (!camera_on) {
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gl_canvas.onLoop();
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} else if ((video_el.videoWidth > 0) &&
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(video_el.videoHeight > 0) &&
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gl_canvas.onLoop()) {
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// get aspect ratio of video
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const ar_video = video_el.videoWidth / video_el.videoHeight;
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// Note: we need to use canvas_el_parent.parentNode.offsetWidth
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// to take into account margins
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let width, height;
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const ar_parent = canvas_el_parent.parentNode.offsetWidth /
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canvas_el_parent.offsetHeight;
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if (lock_portrait) {
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if (zoom_video) {
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if (ar_video < ar_encoder_inv) {
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if (ar_parent >= ar_video) {
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height = canvas_el_parent.offsetHeight * ar_encoder_inv;
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width = canvas_el_parent.offsetHeight;
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} else {
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height = canvas_el_parent.parentNode.offsetWidth / (video_encoder_config.width * ar_video / video_encoder_config.height);
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width = canvas_el_parent.parentNode.offsetWidth / ar_video;
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}
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} else if (ar_parent >= ar_video) {
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height = canvas_el_parent.offsetHeight * ar_video;
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width = canvas_el_parent.offsetHeight / (video_encoder_config.height / ar_video / video_encoder_config.width);
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} else {
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height = canvas_el_parent.parentNode.offsetWidth;
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width = canvas_el_parent.parentNode.offsetWidth / ar_encoder_inv;
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}
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} else if (ar_parent >= ar_encoder_inv) {
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height = canvas_el_parent.offsetHeight * ar_encoder_inv;
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width = canvas_el_parent.offsetHeight;
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} else {
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height = canvas_el_parent.parentNode.offsetWidth;
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width = canvas_el_parent.parentNode.offsetWidth / ar_encoder_inv;
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}
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} else if (zoom_video) {
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if (ar_video < ar_encoder) {
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if (ar_parent >= ar_video) {
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width = canvas_el_parent.offsetHeight * ar_encoder;
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height = canvas_el_parent.offsetHeight;
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} else {
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width = canvas_el_parent.parentNode.offsetWidth / (video_encoder_config.height * ar_video / video_encoder_config.width);
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height = canvas_el_parent.parentNode.offsetWidth / ar_video;
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}
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} else if (ar_parent >= ar_video) {
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width = canvas_el_parent.offsetHeight * ar_video;
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height = canvas_el_parent.offsetHeight / (video_encoder_config.width / ar_video / video_encoder_config.height);
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} else {
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width = canvas_el_parent.parentNode.offsetWidth;
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height = canvas_el_parent.parentNode.offsetWidth / ar_encoder;
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}
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} else if (ar_parent >= ar_encoder) {
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width = canvas_el_parent.offsetHeight * ar_encoder;
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height = canvas_el_parent.offsetHeight;
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} else {
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width = canvas_el_parent.parentNode.offsetWidth;
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height = canvas_el_parent.parentNode.offsetWidth / ar_encoder;
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}
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canvas_el.style.width = `${width}px`;
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canvas_el.style.height = `${height}px`;
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// TODO:
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// windows, iOS, find a mac to test
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// performance on mobile
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}
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}
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async function start_camera(requested_facing_mode) {
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mic_el.removeEventListener('click', mic_toggle);
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camera_el.removeEventListener('click', camera_toggle);
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camera_swap_el.removeEventListener('click', about_face);
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async function finish() {
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await hls.start();
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mic_el.addEventListener('click', mic_toggle);
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camera_el.addEventListener('click', camera_toggle);
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camera_swap_el.addEventListener('click', about_face);
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}
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const need_audio = (audio_source === silence) && !mic_icon_el.classList.contains('off');
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const need_video = !camera_on && !camera_icon_el.classList.contains('off');
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if (!need_audio && !need_video) {
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return await finish();
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}
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const camera_video_constraints = {
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width: video_encoder_config.width,
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height: video_encoder_config.height,
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frameRate: {
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ideal: target_frame_rate,
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max: target_frame_rate
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},
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facingMode: requested_facing_mode
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};
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try {
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camera_stream = await navigator.mediaDevices.getUserMedia({
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audio: need_audio,
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video: need_video ? camera_video_constraints : false
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});
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} catch (ex) {
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if (!need_audio) {
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throw ex;
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}
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// retry in case audio isn't available
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console.warn("Failed to get user media, retrying without audio");
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camera_stream = await navigator.mediaDevices.getUserMedia({
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audio: false,
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video: camera_video_constraints
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});
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}
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// wait for stream to load (must come after gl_canvas.setTexture() since it
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// registers a loadeddata handler which then registers a play handler)
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video_el.addEventListener('loadeddata', async function () {
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try {
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console.log(`video resolution: ${this.videoWidth}x${this.videoHeight}`);
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// start the stream
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this.play();
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if (need_video) {
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const video_tracks = camera_stream.getVideoTracks();
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if (video_tracks.length > 0) {
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facing_mode = video_tracks[0].facingMode || 'user';
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localStorage.setItem('streamana-facing-mode', facing_mode);
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camera_on = true;
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gl_canvas.setUniform('u_active', camera_on);
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} else {
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console.warn("No video present");
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}
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}
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if (need_audio) {
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if (camera_stream.getAudioTracks().length > 0) {
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audio_source.disconnect();
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// add audio if present
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audio_source = audio_dest.context.createMediaStreamSource(camera_stream);
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audio_source.connect(audio_dest);
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} else {
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console.warn("No audio present, using silence");
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}
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}
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await finish();
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} catch (ex) {
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cleanup(ex);
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}
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}, { once: true });
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// pass the stream from the camera to the video so it can render the frames
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video_el.srcObject = camera_stream;
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}
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function about_face() {
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if (camera_on) {
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if (camera_stream) {
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for (let track of camera_stream.getVideoTracks()) {
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track.stop();
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}
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}
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camera_on = false;
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gl_canvas.setUniform('u_active', camera_on);
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}
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if (reset_audio_el.checked) {
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if (audio_source !== silence) {
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if (camera_stream) {
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for (let track of camera_stream.getAudioTracks()) {
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track.stop();
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}
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}
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audio_source.disconnect();
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audio_source = silence;
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audio_source.connect(audio_dest);
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}
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}
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start_camera(facing_mode == 'user' ? 'environment' : 'user');
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}
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function greyscale() {
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gl_canvas.setUniform('u_greyscale', this.checked);
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}
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function mic_toggle() {
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if (mic_icon_el.classList.contains('off')) {
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if (audio_source !== silence) {
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if (camera_stream) {
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for (let track of camera_stream.getAudioTracks()) {
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track.stop();
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}
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}
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audio_source.disconnect();
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audio_source = silence;
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audio_source.connect(audio_dest);
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}
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}
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start_camera(facing_mode);
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}
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function camera_toggle() {
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if (camera_icon_el.classList.contains('off')) {
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if (camera_on) {
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if (camera_stream) {
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for (let track of camera_stream.getVideoTracks()) {
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track.stop();
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}
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}
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camera_on = false;
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gl_canvas.setUniform('u_active', camera_on);
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}
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}
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start_camera(facing_mode);
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}
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try {
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// create video element which will be used for grabbing the frames to
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// write to a canvas so we can apply webgl shaders
|
|
// also used to get the native video dimensions
|
|
video_el = document.createElement('video');
|
|
video_el.muted = true;
|
|
video_el.playsInline = true;
|
|
|
|
// Safari on iOS requires us to play() in the click handler and doesn't
|
|
// track async calls. So we play a blank video first. After that, the video
|
|
// element is blessed for script-driven playback.
|
|
video_el.src = 'empty.mp4';
|
|
await video_el.play();
|
|
|
|
canvas_el.addEventListener('webglcontextlost', cleanup);
|
|
|
|
// set canvas dimensions to same as encoder so its gets all the output
|
|
canvas_el.width = video_encoder_config.width;
|
|
canvas_el.height = video_encoder_config.height;
|
|
|
|
// use glsl-canvas to make managing webgl stuff easier
|
|
gl_canvas = new GlCanvas(canvas_el, {
|
|
fragmentString: shader
|
|
});
|
|
|
|
gl_canvas.on('error', cleanup);
|
|
|
|
// tell canvas to use frames from video
|
|
gl_canvas.setTexture('u_texture', video_el);
|
|
|
|
// tell shader whether to greyscale
|
|
gl_canvas.setUniform('u_greyscale', greyscale_el.checked);
|
|
greyscale_el.addEventListener('input', greyscale);
|
|
|
|
// tell shader camera hasn't started
|
|
gl_canvas.setUniform('u_active', camera_on);
|
|
|
|
// check whether we're locking portrait mode or zooming (display without bars)
|
|
if (lock_portrait) {
|
|
// rotate the canvas
|
|
canvas_el.classList.add('rotate');
|
|
canvas_el.classList.remove('mw-100', 'mh-100');
|
|
canvas_el_parent.classList.remove('mx-auto');
|
|
|
|
// lock to portrait mode
|
|
try {
|
|
await screen.orientation.lock('portrait');
|
|
} catch (ex) {
|
|
if (ex.name === 'SecurityError') {
|
|
if (!document.fullscreenElement) {
|
|
await document.documentElement.requestFullscreen();
|
|
}
|
|
await screen.orientation.lock('portrait');
|
|
} else if (ex.name !== 'NotSupportedError') {
|
|
throw ex;
|
|
}
|
|
}
|
|
} else if (zoom_video) {
|
|
// we're going to remove the bars for local display only
|
|
canvas_el.classList.add('zoom');
|
|
canvas_el.classList.remove('mw-100', 'mh-100');
|
|
canvas_el_parent.classList.remove('mx-auto');
|
|
}
|
|
|
|
// if we're locked to portrait mode, tell the shader to rotate the video
|
|
gl_canvas.setUniform('u_rotate', lock_portrait);
|
|
|
|
// capture video from the canvas
|
|
// Note: Safari on iOS doesn't get any data, might be related to
|
|
// https://bugs.webkit.org/show_bug.cgi?id=181663
|
|
//const frame_rate = video_settings.frameRate;
|
|
canvas_stream = canvas_el.captureStream(target_frame_rate);
|
|
|
|
// add audio to canvas stream
|
|
audio_dest = new AudioContext().createMediaStreamDestination();
|
|
canvas_stream.addTrack(audio_dest.stream.getAudioTracks()[0]);
|
|
|
|
// Note: createBufferSource is supposed to be used to create silence
|
|
// but it doesn't keep the page active if it's hidden.
|
|
// Use createConstantSource instead. Since this is a constant value,
|
|
// it won't generate something that changes (such as a sine or sawtooth
|
|
// waveform) and so is inaudible. This passes the browser's silence
|
|
// detection, which must just check for zero values.
|
|
// Note: WebAudio destination stream output is bugged on Safari:
|
|
// https://bugs.webkit.org/show_bug.cgi?id=173863
|
|
// https://bugs.webkit.org/show_bug.cgi?id=198284
|
|
//const silence = audio_dest.context.createBufferSource();
|
|
silence = audio_dest.context.createConstantSource();
|
|
silence.start();
|
|
audio_source = silence;
|
|
audio_source.connect(audio_dest);
|
|
|
|
// HLS from the canvas stream to the ingestion URL
|
|
hls = new HLS(canvas_stream, ingestion_url, ffmpeg_lib_url, target_frame_rate, lock_portrait);
|
|
hls.addEventListener('run', () => console.log('HLS running'));
|
|
hls.addEventListener('exit', ev => {
|
|
const msg = `HLS exited with status ${ev.detail.code}`;
|
|
if (ev.detail.code === 0) {
|
|
console.log(msg);
|
|
cleanup();
|
|
} else {
|
|
cleanup(msg);
|
|
}
|
|
});
|
|
hls.addEventListener('error', cleanup);
|
|
hls.addEventListener('start', function () {
|
|
if (done) {
|
|
this.end(true);
|
|
}
|
|
waiting_el.classList.add('d-none');
|
|
camera_swap_el.classList.remove('d-none');
|
|
canvas_el.classList.remove('invisible');
|
|
go_live_el.disabled = false;
|
|
update();
|
|
});
|
|
hls.addEventListener('update', update);
|
|
|
|
await start_camera(facing_mode);
|
|
} catch (ex) {
|
|
return cleanup(ex);
|
|
}
|
|
}
|
|
|
|
function stop() {
|
|
go_live_el.disabled = true;
|
|
hls.end();
|
|
}
|