src/content/browser/resources/media/manager.js

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * @fileoverview Keeps track of all the existing PlayerInfo and
   7  * audio stream objects and is the entry-point for messages from the backend.
   8  *
   9  * The events captured by Manager (add, remove, update) are relayed
  10  * to the clientRenderer which it can choose to use to modify the UI.
  11  */
  12 var Manager = (function() {
  13   'use strict';
  14
  15   function Manager(clientRenderer) {
  16     this.players_ = {};
  17     this.audioComponents_ = [];
  18     this.clientRenderer_ = clientRenderer;
  19   }
  20
  21   Manager.prototype = {
  22     /**
  23      * Updates an audio-component.
  24      * @param componentType Integer AudioComponent enum value; must match values
  25      * from the AudioLogFactory::AudioComponent enum.
  26      * @param componentId The unique-id of the audio-component.
  27      * @param componentData The actual component data dictionary.
  28      */
  29     updateAudioComponent: function(componentType, componentId, componentData) {
  30       if (!(componentType in this.audioComponents_))
  31         this.audioComponents_[componentType] = {};
  32       if (!(componentId in this.audioComponents_[componentType])) {
  33         this.audioComponents_[componentType][componentId] = componentData;
  34       } else {
  35         for (var key in componentData) {
  36           this.audioComponents_[componentType][componentId][key] =
  37               componentData[key];
  38         }
  39       }
  40       this.clientRenderer_.audioComponentAdded(
  41           componentType, this.audioComponents_[componentType]);
  42     },
  43
  44     /**
  45      * Removes an audio-stream from the manager.
  46      * @param id The unique-id of the audio-stream.
  47      */
  48     removeAudioComponent: function(componentType, componentId) {
  49       if (!(componentType in this.audioComponents_) ||
  50           !(componentId in this.audioComponents_[componentType])) {
  51         return;
  52       }
  53
  54       delete this.audioComponents_[componentType][componentId];
  55       this.clientRenderer_.audioComponentRemoved(
  56           componentType, this.audioComponents_[componentType]);
  57     },
  58
  59     /**
  60      * Adds a player to the list of players to manage.
  61      */
  62     addPlayer: function(id) {
  63       if (this.players_[id]) {
  64         return;
  65       }
  66       // Make the PlayerProperty and add it to the mapping
  67       this.players_[id] = new PlayerInfo(id);
  68       this.clientRenderer_.playerAdded(this.players_, this.players_[id]);
  69     },
  70
  71     /**
  72      * Attempts to remove a player from the UI.
  73      * @param id The ID of the player to remove.
  74      */
  75     removePlayer: function(id) {
  76       delete this.players_[id];
  77       this.clientRenderer_.playerRemoved(this.players_, this.players_[id]);
  78     },
  79
  80     updatePlayerInfoNoRecord: function(id, timestamp, key, value) {
  81       if (!this.players_[id]) {
  82         console.error('[updatePlayerInfo] Id ' + id + ' does not exist');
  83         return;
  84       }
  85
  86       this.players_[id].addPropertyNoRecord(timestamp, key, value);
  87       this.clientRenderer_.playerUpdated(this.players_,
  88                                          this.players_[id],
  89                                          key,
  90                                          value);
  91     },
  92
  93     /**
  94      *
  95      * @param id The unique ID that identifies the player to be updated.
  96      * @param timestamp The timestamp of when the change occured.  This
  97      * timestamp is *not* normalized.
  98      * @param key The name of the property to be added/changed.
  99      * @param value The value of the property.
 100      */
 101     updatePlayerInfo: function(id, timestamp, key, value) {
 102       if (!this.players_[id]) {
 103         console.error('[updatePlayerInfo] Id ' + id + ' does not exist');
 104         return;
 105       }
 106
 107       this.players_[id].addProperty(timestamp, key, value);
 108       this.clientRenderer_.playerUpdated(this.players_,
 109                                          this.players_[id],
 110                                          key,
 111                                          value);
 112     },
 113
 114     parseVideoCaptureFormat_: function(format) {
 115       /**
 116        * Example:
 117        *
 118        * format:
 119        *   "resolution: 1280x720, fps: 30.000000, pixel format: I420"
 120        *
 121        * formatDict:
 122        *   {'resolution':'1280x720', 'fps': '30.00'}
 123        */
 124       var parts = format.split(', ');
 125       var formatDict = {};
 126       for (var i in parts) {
 127         var kv = parts[i].split(': ');
 128         formatDict[kv[0]] = kv[1];
 129       }
 130
 131       // Round down the FPS to 2 decimals.
 132       formatDict['fps'] = parseFloat(formatDict['fps']).toFixed(2);
 133
 134       // The camera does not actually output I420 so this info is misleading.
 135       delete formatDict['pixel format'];
 136
 137       return formatDict;
 138     },
 139
 140     updateVideoCaptureCapabilities: function(videoCaptureCapabilities) {
 141       // Parse the video formats to be structured for the table.
 142       for (var i in videoCaptureCapabilities) {
 143         for (var j in videoCaptureCapabilities[i]['formats']) {
 144           videoCaptureCapabilities[i]['formats'][j] =
 145               this.parseVideoCaptureFormat_(
 146                     videoCaptureCapabilities[i]['formats'][j]);
 147         }
 148       }
 149
 150       // The keys of each device to be shown in order of appearance.
 151       var videoCaptureDeviceKeys = ['name','formats','captureApi','id'];
 152
 153       this.clientRenderer_.redrawVideoCaptureCapabilities(
 154           videoCaptureCapabilities, videoCaptureDeviceKeys);
 155     }
 156   };
 157
 158   return Manager;
 159 }());