content/browser/android/media_players_observer.cc

   1 // Copyright 2015 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 #include "content/browser/android/media_players_observer.h"
   6
   7 #include <climits>
   8
   9 #include "base/logging.h"
  10 #include "content/public/browser/web_contents.h"
  11
  12 namespace content {
  13
  14 MediaPlayersObserver::MediaPlayersObserver(WebContents* web_contents)
  15     : AudioStateProvider(web_contents) {
  16 }
  17
  18 MediaPlayersObserver::~MediaPlayersObserver() {}
  19
  20 bool MediaPlayersObserver::IsAudioStateAvailable() const {
  21   return true;
  22 }
  23
  24 // This audio state provider does not have a monitor
  25 AudioStreamMonitor* MediaPlayersObserver::audio_stream_monitor() {
  26   return nullptr;
  27 }
  28
  29 void MediaPlayersObserver::OnAudibleStateChanged(RenderFrameHost* rfh,
  30                                                 int player_id,
  31                                                 bool is_audible) {
  32   audio_status_map_[Key(rfh, player_id)] = is_audible;
  33   UpdateStatusAndNotify();
  34 }
  35
  36 void MediaPlayersObserver::RemovePlayer(RenderFrameHost* rfh, int player_id) {
  37   audio_status_map_.erase(Key(rfh, player_id));
  38   UpdateStatusAndNotify();
  39 }
  40
  41 void MediaPlayersObserver::RenderFrameDeleted(RenderFrameHost* rfh) {
  42   StatusMap::iterator begin = audio_status_map_.lower_bound(Key(rfh, 0));
  43   StatusMap::iterator end = audio_status_map_.upper_bound(Key(rfh, INT_MAX));
  44   audio_status_map_.erase(begin, end);
  45   UpdateStatusAndNotify();
  46 }
  47
  48 void MediaPlayersObserver::UpdateStatusAndNotify() {
  49   for (const auto& player_status : audio_status_map_) {
  50     if (player_status.second) {
  51       Notify(true);  // at least one player is making noise
  52       return;
  53     }
  54   }
  55
  56   Notify(false);
  57 }
  58
  59 } // namespace content