content/browser/resources/media/main.js

// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * A global object that gets used by the C++ interface.
 */
var media = (function() {
  'use strict';

  var manager = null;

  /**
   * Users of |media| must call initialize prior to calling other methods.
   */
  media.initialize = function(theManager) {
    manager = theManager;
  };

  media.onReceiveAudioStreamData = function(audioStreamData) {
    for (var component in audioStreamData) {
      media.updateAudioComponent(audioStreamData[component]);
    }
  };

  media.onReceiveVideoCaptureCapabilities = function(videoCaptureCapabilities) {
    manager.updateVideoCaptureCapabilities(videoCaptureCapabilities)
  }

  media.onRendererTerminated = function(renderId) {
    util.object.forEach(manager.players_, function(playerInfo, id) {
      if (playerInfo.properties['render_id'] == renderId) {
        manager.removePlayer(id);
      }
    });
  };

  media.updateAudioComponent = function(component) {
    var uniqueComponentId = component.owner_id + ':' + component.component_id;
    switch (component.status) {
      case 'closed':
        manager.removeAudioComponent(
            component.component_type, uniqueComponentId);
        break;
      default:
        manager.updateAudioComponent(
            component.component_type, uniqueComponentId, component);
        break;
    }
  };

  media.onPlayerOpen = function(id, timestamp) {
    manager.addPlayer(id, timestamp);
  };

  media.onMediaEvent = function(event) {
    var source = event.renderer + ':' + event.player;

    // Although this gets called on every event, there is nothing we can do
    // because there is no onOpen event.
    media.onPlayerOpen(source);
    manager.updatePlayerInfoNoRecord(
        source, event.ticksMillis, 'render_id', event.renderer);
    manager.updatePlayerInfoNoRecord(
        source, event.ticksMillis, 'player_id', event.player);

    var propertyCount = 0;
    util.object.forEach(event.params, function(value, key) {
      key = key.trim();

      // These keys get spammed *a lot*, so put them on the display
      // but don't log list.
      if (key === 'buffer_start' ||
          key === 'buffer_end' ||
          key === 'buffer_current' ||
          key === 'is_downloading_data') {
        manager.updatePlayerInfoNoRecord(
            source, event.ticksMillis, key, value);
      } else {
        manager.updatePlayerInfo(source, event.ticksMillis, key, value);
      }
      propertyCount += 1;
    });

    if (propertyCount === 0) {
      manager.updatePlayerInfo(
          source, event.ticksMillis, 'event', event.type);
    }
  };

  // |chrome| is not defined during tests.
  if (window.chrome && window.chrome.send) {
    chrome.send('getEverything');
  }
  return media;
}());