Audio metadata

package.json

@@ -22,6 +22,7 @@
     "hyperx": "^2.0.2",
     "main-loop": "^3.2.0",
     "mkdirp": "^0.5.1",
+    "musicmetadata": "^2.0.2",
     "network-address": "^1.1.0",
     "prettier-bytes": "^1.0.1",
     "upload-element": "^1.0.1",
@@ -30,7 +31,6 @@
     "winreg": "^1.0.1"
   },
   "devDependencies": {
-    "appdmg": "^0.3.6",
     "electron-osx-sign": "^0.3.0",
     "electron-packager": "^5.0.0",
     "electron-prebuilt": "0.37.2",
@@ -40,6 +40,9 @@
     "rimraf": "^2.5.2",
     "standard": "^6.0.5"
   },
+  "optionalDependencies": {
+    "appdmg": "^0.3.6"
+  },
   "homepage": "https://webtorrent.io",
   "keywords": [
     "electron",

renderer/index.css

@@ -730,6 +730,34 @@ body.drag .torrent-placeholder span {
   font-weight: bold;
 }
 
+/*
+ * AUDIO DETAILS
+ */
+
+.audio-metadata {
+  width: 500px;
+  max-width: 100%;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+  align-self: center;
+  margin: 0 auto;
+  font-weight: bold;
+  font-size: 24px;
+  line-height: 2;
+}
+
+.audio-metadata .audio-title {
+  font-size: 32px;
+}
+
+.audio-metadata label {
+  display:inline-block;
+  width: 100px;
+  text-align: right;
+  font-weight: normal;
+  margin-right: 25px;
+}
+
 /*
  * ERRORS
  */

renderer/index.js

@@ -8,6 +8,7 @@ var EventEmitter = require('events')
 var fs = require('fs')
 var mainLoop = require('main-loop')
 var mkdirp = require('mkdirp')
+var musicmetadata = require('musicmetadata')
 var networkAddress = require('network-address')
 var path = require('path')
 var remote = require('remote')
@@ -609,7 +610,17 @@ function startServerFromReadyTorrent (torrent, index, cb) {
   state.playing.infoHash = torrent.infoHash
   state.playing.fileIndex = index
   state.playing.type = TorrentPlayer.isVideo(file) ? 'video' : 'audio'
+  state.playing.audioInfo = null
 
+  // if it's audio, parse out the metadata (artist, title, etc)
+  musicmetadata(file.createReadStream(), function (err, info) {
+    if (err) return
+    console.log('Got audio metadata for %s: %v', file.name, info)
+    state.playing.audioInfo = info
+    update()
+  })
+
+  // either way, start a streaming torrent-to-http server
   var server = torrent.createServer()
   server.listen(0, function () {
     var port = server.address().port

renderer/views/player.js

@@ -21,6 +21,8 @@ function Player (state, dispatch) {
 }
 
 function renderMedia (state, dispatch) {
+  if (!state.server) return
+
   // Unfortunately, play/pause can't be done just by modifying HTML.
   // Instead, grab the DOM node and play/pause it if necessary
   var mediaType = state.playing.type /* 'audio' or 'video' */
@@ -57,8 +59,9 @@ function renderMedia (state, dispatch) {
   // Show the media.
   // Video fills the window, centered with black bars if necessary
   // Audio gets a static poster image and a summary of the file metadata.
+  var isAudio = mediaType === 'audio'
   var style = {
-    backgroundImage: mediaType === 'audio' ? cssBackgroundImagePoster(state) : ''
+    backgroundImage: isAudio ? cssBackgroundImagePoster(state) : ''
   }
   return hx`
     <div
@@ -66,6 +69,7 @@ function renderMedia (state, dispatch) {
       style=${style}
       onmousemove=${() => dispatch('mediaMouseMoved')}>
       ${mediaTag}
+      ${renderAudioMetadata(state)}
     </div>
   `
 
@@ -86,6 +90,34 @@ function renderMedia (state, dispatch) {
   }
 }
 
+function renderAudioMetadata (state) {
+  if (!state.playing.audioInfo) return
+  var info = state.playing.audioInfo
+
+  // Get audio track info
+  var title = info.title
+  if (!title) {
+    var torrentSummary = getPlayingTorrentSummary(state)
+    title = torrentSummary.files[state.playing.fileIndex].name
+  }
+  var artist = info.artist && info.artist[0]
+  var album = info.album
+  if (album && info.year && !album.includes(info.year)) {
+    album += ' (' + info.year + ')'
+  }
+  var track
+  if (info.track && info.track.no && info.track.of) {
+    track = info.track.no + ' of ' + info.track.of
+  }
+
+  // Show a small info box in the middle of the screen
+  var elems = [hx`<div class='audio-title'><label></label>${title}</div>`]
+  if (artist) elems.push(hx`<div class='audio-artist'><label>Artist</label>${artist}</div>`)
+  if (album) elems.push(hx`<div class='audio-album'><label>Album</label>${album}</div>`)
+  if (track) elems.push(hx`<div class='audio-track'><label>Track</label>${track}</div>`)
+  return hx`<div class='audio-metadata'>${elems}</div>`
+}
+
 function renderCastScreen (state, dispatch) {
   var isChromecast = state.playing.location.startsWith('chromecast')
   var isAirplay = state.playing.location.startsWith('airplay')
@@ -112,8 +144,7 @@ function renderCastScreen (state, dispatch) {
 
 // Returns the CSS background-image string for a poster image + dark vignette
 function cssBackgroundImagePoster (state) {
-  var infoHash = state.playing.infoHash
-  var torrentSummary = state.saved.torrents.find((x) => x.infoHash === infoHash)
+  var torrentSummary = getPlayingTorrentSummary(state)
   if (!torrentSummary || !torrentSummary.posterURL) return ''
   var cleanURL = torrentSummary.posterURL.replace(/\\/g, '/')
   return 'radial-gradient(circle at center, ' +
@@ -121,6 +152,11 @@ function cssBackgroundImagePoster (state) {
     `, url(${cleanURL})`
 }
 
+function getPlayingTorrentSummary (state) {
+  var infoHash = state.playing.infoHash
+  return state.saved.torrents.find((x) => x.infoHash === infoHash)
+}
+
 function renderPlayerControls (state, dispatch) {
   var positionPercent = 100 * state.playing.currentTime / state.playing.duration
   var playbackCursorStyle = { left: 'calc(' + positionPercent + '% - 8px)' }