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      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  * A global object that gets used by the C++ interface.
      7  */
      8 var media = (function() {
      9   'use strict';
     10 
     11   var manager = null;
     12 
     13   /**
     14    * Users of |media| must call initialize prior to calling other methods.
     15    */
     16   function initialize(playerManager) {
     17     manager = playerManager;
     18   }
     19 
     20   /**
     21    * Call to modify or add a system property.
     22    */
     23   function onSystemProperty(timestamp, key, value) {
     24     console.log('System properties not yet implemented');
     25   }
     26 
     27   /**
     28    * Call to modify or add a property on a player.
     29    */
     30   function onPlayerProperty(id, timestamp, key, value) {
     31     manager.updatePlayerInfo(id, timestamp, key, value);
     32   }
     33 
     34   function onPlayerPropertyNoRecord(id, timestamp, key, value) {
     35     manager.updatePlayerInfoNoRecord(id, timestamp, key, value);
     36   }
     37 
     38   /**
     39    * Call to add a player.
     40    */
     41   function onPlayerOpen(id, timestamp) {
     42     manager.addPlayer(id, timestamp);
     43   }
     44 
     45   /**
     46    * Call to remove a player.
     47    */
     48   function onPlayerClose(id) {
     49     manager.removePlayer(id);
     50   }
     51 
     52   var media = {
     53     onSystemProperty: onSystemProperty,
     54     onPlayerProperty: onPlayerProperty,
     55     onPlayerPropertyNoRecord: onPlayerPropertyNoRecord,
     56     onPlayerOpen: onPlayerOpen,
     57     onPlayerClose: onPlayerClose,
     58 
     59     initialize: initialize
     60   };
     61 
     62   // Everything beyond this point is for backwards compatibility reasons.
     63   // It will go away when the backend is updated.
     64 
     65   media.onNetUpdate = function(update) {
     66     // TODO(tyoverby): Implement
     67   };
     68 
     69   media.onRendererTerminated = function(renderId) {
     70     util.object.forEach(manager.players_, function(playerInfo, id) {
     71       if (playerInfo.properties['render_id'] == renderId) {
     72         media.onPlayerClose(id);
     73       }
     74     });
     75   };
     76 
     77   // For whatever reason, addAudioStream is also called on
     78   // the removal of audio streams.
     79   media.addAudioStream = function(event) {
     80     switch (event.status) {
     81       case 'created':
     82         media.onPlayerOpen(event.id);
     83         // We have to simulate the timestamp since it isn't provided to us.
     84         media.onPlayerProperty(
     85             event.id, (new Date()).getTime(), 'playing', event.playing);
     86         break;
     87       case 'closed':
     88         media.onPlayerClose(event.id);
     89         break;
     90     }
     91   };
     92   media.onItemDeleted = function() {
     93     // This only gets called when an audio stream is removed, which
     94     // for whatever reason is also handled by addAudioStream...
     95     // Because it is already handled, we can safely ignore it.
     96   };
     97 
     98   media.onMediaEvent = function(event) {
     99     var source = event.renderer + ':' + event.player;
    100 
    101     // Although this gets called on every event, there is nothing we can do
    102     // about this because there is no onOpen event.
    103     media.onPlayerOpen(source);
    104     media.onPlayerPropertyNoRecord(
    105         source, event.ticksMillis, 'render_id', event.renderer);
    106     media.onPlayerPropertyNoRecord(
    107         source, event.ticksMillis, 'player_id', event.player);
    108 
    109     var propertyCount = 0;
    110     util.object.forEach(event.params, function(value, key) {
    111       key = key.trim();
    112 
    113       // These keys get spammed *a lot*, so put them on the display
    114       // but don't log list.
    115       if (key === 'buffer_start' ||
    116           key === 'buffer_end' ||
    117           key === 'buffer_current' ||
    118           key === 'is_downloading_data') {
    119         media.onPlayerPropertyNoRecord(
    120             source, event.ticksMillis, key, value);
    121       } else {
    122         media.onPlayerProperty(source, event.ticksMillis, key, value);
    123       }
    124       propertyCount += 1;
    125     });
    126 
    127     if (propertyCount === 0) {
    128       media.onPlayerProperty(
    129           source, event.ticksMillis, 'EVENT', event.type);
    130     }
    131   };
    132 
    133   return media;
    134 }());
    135