chrome/browser/media/media_capture_devices_dispatcher.cc

   1 // Copyright (c) 2012 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 "chrome/browser/media/media_capture_devices_dispatcher.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "base/metrics/field_trial.h"
  10 #include "base/prefs/pref_service.h"
  11 #include "base/prefs/scoped_user_pref_update.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "chrome/browser/media/desktop_streams_registry.h"
  16 #include "chrome/browser/media/media_access_handler.h"
  17 #include "chrome/browser/media/media_stream_capture_indicator.h"
  18 #include "chrome/browser/media/permission_bubble_media_access_handler.h"
  19 #include "chrome/browser/profiles/profile.h"
  20 #include "chrome/browser/ui/browser.h"
  21 #include "chrome/browser/ui/browser_window.h"
  22 #include "chrome/common/chrome_switches.h"
  23 #include "chrome/common/pref_names.h"
  24 #include "components/pref_registry/pref_registry_syncable.h"
  25 #include "content/public/browser/browser_thread.h"
  26 #include "content/public/browser/media_capture_devices.h"
  27 #include "content/public/browser/notification_source.h"
  28 #include "content/public/browser/render_frame_host.h"
  29 #include "content/public/browser/render_process_host.h"
  30 #include "content/public/browser/web_contents.h"
  31 #include "content/public/common/media_stream_request.h"
  32 #include "extensions/common/constants.h"
  33 #include "media/base/media_switches.h"
  34 #include "net/base/net_util.h"
  35
  36 #if defined(OS_CHROMEOS)
  37 #include "ash/shell.h"
  38 #endif  // defined(OS_CHROMEOS)
  39
  40 #if defined(ENABLE_EXTENSIONS)
  41 #include "chrome/browser/media/desktop_capture_access_handler.h"
  42 #include "chrome/browser/media/extension_media_access_handler.h"
  43 #include "chrome/browser/media/tab_capture_access_handler.h"
  44 #include "extensions/browser/extension_registry.h"
  45 #include "extensions/common/extension.h"
  46 #include "extensions/common/permissions/permissions_data.h"
  47 #endif
  48
  49 using content::BrowserThread;
  50 using content::MediaCaptureDevices;
  51 using content::MediaStreamDevices;
  52
  53 namespace {
  54
  55 // Finds a device in |devices| that has |device_id|, or NULL if not found.
  56 const content::MediaStreamDevice* FindDeviceWithId(
  57     const content::MediaStreamDevices& devices,
  58     const std::string& device_id) {
  59   content::MediaStreamDevices::const_iterator iter = devices.begin();
  60   for (; iter != devices.end(); ++iter) {
  61     if (iter->id == device_id) {
  62       return &(*iter);
  63     }
  64   }
  65   return NULL;
  66 }
  67
  68 #if defined(ENABLE_EXTENSIONS)
  69 inline DesktopCaptureAccessHandler* ToDesktopCaptureAccessHandler(
  70     MediaAccessHandler* handler) {
  71   return static_cast<DesktopCaptureAccessHandler*>(handler);
  72 }
  73 #endif
  74 }  // namespace
  75
  76 MediaCaptureDevicesDispatcher* MediaCaptureDevicesDispatcher::GetInstance() {
  77   return base::Singleton<MediaCaptureDevicesDispatcher>::get();
  78 }
  79
  80 MediaCaptureDevicesDispatcher::MediaCaptureDevicesDispatcher()
  81     : is_device_enumeration_disabled_(false),
  82       media_stream_capture_indicator_(new MediaStreamCaptureIndicator()) {
  83   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  84
  85 #if defined(OS_MACOSX)
  86   // AVFoundation is used for video/audio device monitoring and video capture.
  87   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
  88           switches::kForceQTKit)) {
  89     base::CommandLine::ForCurrentProcess()->AppendSwitch(
  90         switches::kEnableAVFoundation);
  91   }
  92 #endif
  93
  94 #if defined(ENABLE_EXTENSIONS)
  95   media_access_handlers_.push_back(new ExtensionMediaAccessHandler());
  96   media_access_handlers_.push_back(new DesktopCaptureAccessHandler());
  97   media_access_handlers_.push_back(new TabCaptureAccessHandler());
  98 #endif
  99   media_access_handlers_.push_back(new PermissionBubbleMediaAccessHandler());
 100 }
 101
 102 MediaCaptureDevicesDispatcher::~MediaCaptureDevicesDispatcher() {}
 103
 104 void MediaCaptureDevicesDispatcher::RegisterProfilePrefs(
 105     user_prefs::PrefRegistrySyncable* registry) {
 106   registry->RegisterStringPref(prefs::kDefaultAudioCaptureDevice,
 107                                std::string());
 108   registry->RegisterStringPref(prefs::kDefaultVideoCaptureDevice,
 109                                std::string());
 110 }
 111
 112 bool MediaCaptureDevicesDispatcher::IsOriginForCasting(const GURL& origin) {
 113   // Whitelisted tab casting extensions.
 114   return
 115       // Dev
 116       origin.spec() == "chrome-extension://enhhojjnijigcajfphajepfemndkmdlo/" ||
 117       // Canary
 118       origin.spec() == "chrome-extension://hfaagokkkhdbgiakmmlclaapfelnkoah/" ||
 119       // Beta (internal)
 120       origin.spec() == "chrome-extension://fmfcbgogabcbclcofgocippekhfcmgfj/" ||
 121       // Google Cast Beta
 122       origin.spec() == "chrome-extension://dliochdbjfkdbacpmhlcpmleaejidimm/" ||
 123       // Google Cast Stable
 124       origin.spec() == "chrome-extension://boadgeojelhgndaghljhdicfkmllpafd/" ||
 125       // http://crbug.com/457908
 126       origin.spec() == "chrome-extension://ekpaaapppgpmolpcldedioblbkmijaca/" ||
 127       origin.spec() == "chrome-extension://fjhoaacokmgbjemoflkofnenfaiekifl/";
 128 }
 129
 130 void MediaCaptureDevicesDispatcher::AddObserver(Observer* observer) {
 131   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 132   if (!observers_.HasObserver(observer))
 133     observers_.AddObserver(observer);
 134 }
 135
 136 void MediaCaptureDevicesDispatcher::RemoveObserver(Observer* observer) {
 137   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 138   observers_.RemoveObserver(observer);
 139 }
 140
 141 const MediaStreamDevices&
 142 MediaCaptureDevicesDispatcher::GetAudioCaptureDevices() {
 143   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 144   if (is_device_enumeration_disabled_ || !test_audio_devices_.empty())
 145     return test_audio_devices_;
 146
 147   return MediaCaptureDevices::GetInstance()->GetAudioCaptureDevices();
 148 }
 149
 150 const MediaStreamDevices&
 151 MediaCaptureDevicesDispatcher::GetVideoCaptureDevices() {
 152   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 153   if (is_device_enumeration_disabled_ || !test_video_devices_.empty())
 154     return test_video_devices_;
 155
 156   return MediaCaptureDevices::GetInstance()->GetVideoCaptureDevices();
 157 }
 158
 159 void MediaCaptureDevicesDispatcher::ProcessMediaAccessRequest(
 160     content::WebContents* web_contents,
 161     const content::MediaStreamRequest& request,
 162     const content::MediaResponseCallback& callback,
 163     const extensions::Extension* extension) {
 164   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 165
 166   for (MediaAccessHandler* handler : media_access_handlers_) {
 167     if (handler->SupportsStreamType(request.video_type, extension) ||
 168         handler->SupportsStreamType(request.audio_type, extension)) {
 169       handler->HandleRequest(web_contents, request, callback, extension);
 170       return;
 171     }
 172   }
 173   callback.Run(content::MediaStreamDevices(),
 174                content::MEDIA_DEVICE_NOT_SUPPORTED, nullptr);
 175 }
 176
 177 bool MediaCaptureDevicesDispatcher::CheckMediaAccessPermission(
 178     content::WebContents* web_contents,
 179     const GURL& security_origin,
 180     content::MediaStreamType type) {
 181   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 182   return CheckMediaAccessPermission(web_contents, security_origin, type,
 183                                     nullptr);
 184 }
 185
 186 bool MediaCaptureDevicesDispatcher::CheckMediaAccessPermission(
 187     content::WebContents* web_contents,
 188     const GURL& security_origin,
 189     content::MediaStreamType type,
 190     const extensions::Extension* extension) {
 191   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 192   for (MediaAccessHandler* handler : media_access_handlers_) {
 193     if (handler->SupportsStreamType(type, extension)) {
 194       return handler->CheckMediaAccessPermission(web_contents, security_origin,
 195                                                  type, extension);
 196     }
 197   }
 198   return false;
 199 }
 200
 201 void MediaCaptureDevicesDispatcher::GetDefaultDevicesForProfile(
 202     Profile* profile,
 203     bool audio,
 204     bool video,
 205     content::MediaStreamDevices* devices) {
 206   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 207   DCHECK(audio || video);
 208
 209   PrefService* prefs = profile->GetPrefs();
 210   std::string default_device;
 211   if (audio) {
 212     default_device = prefs->GetString(prefs::kDefaultAudioCaptureDevice);
 213     const content::MediaStreamDevice* device =
 214         GetRequestedAudioDevice(default_device);
 215     if (!device)
 216       device = GetFirstAvailableAudioDevice();
 217     if (device)
 218       devices->push_back(*device);
 219   }
 220
 221   if (video) {
 222     default_device = prefs->GetString(prefs::kDefaultVideoCaptureDevice);
 223     const content::MediaStreamDevice* device =
 224         GetRequestedVideoDevice(default_device);
 225     if (!device)
 226       device = GetFirstAvailableVideoDevice();
 227     if (device)
 228       devices->push_back(*device);
 229   }
 230 }
 231
 232 const content::MediaStreamDevice*
 233 MediaCaptureDevicesDispatcher::GetRequestedAudioDevice(
 234     const std::string& requested_audio_device_id) {
 235   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 236   const content::MediaStreamDevices& audio_devices = GetAudioCaptureDevices();
 237   const content::MediaStreamDevice* const device =
 238       FindDeviceWithId(audio_devices, requested_audio_device_id);
 239   return device;
 240 }
 241
 242 const content::MediaStreamDevice*
 243 MediaCaptureDevicesDispatcher::GetFirstAvailableAudioDevice() {
 244   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 245   const content::MediaStreamDevices& audio_devices = GetAudioCaptureDevices();
 246   if (audio_devices.empty())
 247     return NULL;
 248   return &(*audio_devices.begin());
 249 }
 250
 251 const content::MediaStreamDevice*
 252 MediaCaptureDevicesDispatcher::GetRequestedVideoDevice(
 253     const std::string& requested_video_device_id) {
 254   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 255   const content::MediaStreamDevices& video_devices = GetVideoCaptureDevices();
 256   const content::MediaStreamDevice* const device =
 257       FindDeviceWithId(video_devices, requested_video_device_id);
 258   return device;
 259 }
 260
 261 const content::MediaStreamDevice*
 262 MediaCaptureDevicesDispatcher::GetFirstAvailableVideoDevice() {
 263   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 264   const content::MediaStreamDevices& video_devices = GetVideoCaptureDevices();
 265   if (video_devices.empty())
 266     return NULL;
 267   return &(*video_devices.begin());
 268 }
 269
 270 void MediaCaptureDevicesDispatcher::DisableDeviceEnumerationForTesting() {
 271   is_device_enumeration_disabled_ = true;
 272 }
 273
 274 scoped_refptr<MediaStreamCaptureIndicator>
 275 MediaCaptureDevicesDispatcher::GetMediaStreamCaptureIndicator() {
 276   return media_stream_capture_indicator_;
 277 }
 278
 279 DesktopStreamsRegistry*
 280 MediaCaptureDevicesDispatcher::GetDesktopStreamsRegistry() {
 281   if (!desktop_streams_registry_)
 282     desktop_streams_registry_.reset(new DesktopStreamsRegistry());
 283   return desktop_streams_registry_.get();
 284 }
 285
 286 void MediaCaptureDevicesDispatcher::OnAudioCaptureDevicesChanged() {
 287   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 288   BrowserThread::PostTask(
 289       BrowserThread::UI, FROM_HERE,
 290       base::Bind(
 291           &MediaCaptureDevicesDispatcher::NotifyAudioDevicesChangedOnUIThread,
 292           base::Unretained(this)));
 293 }
 294
 295 void MediaCaptureDevicesDispatcher::OnVideoCaptureDevicesChanged() {
 296   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 297   BrowserThread::PostTask(
 298       BrowserThread::UI, FROM_HERE,
 299       base::Bind(
 300           &MediaCaptureDevicesDispatcher::NotifyVideoDevicesChangedOnUIThread,
 301           base::Unretained(this)));
 302 }
 303
 304 void MediaCaptureDevicesDispatcher::OnMediaRequestStateChanged(
 305     int render_process_id,
 306     int render_frame_id,
 307     int page_request_id,
 308     const GURL& security_origin,
 309     content::MediaStreamType stream_type,
 310     content::MediaRequestState state) {
 311   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 312   BrowserThread::PostTask(
 313       BrowserThread::UI, FROM_HERE,
 314       base::Bind(
 315           &MediaCaptureDevicesDispatcher::UpdateMediaRequestStateOnUIThread,
 316           base::Unretained(this), render_process_id, render_frame_id,
 317           page_request_id, security_origin, stream_type, state));
 318 }
 319
 320 void MediaCaptureDevicesDispatcher::OnCreatingAudioStream(
 321     int render_process_id,
 322     int render_frame_id) {
 323   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 324   BrowserThread::PostTask(
 325       BrowserThread::UI, FROM_HERE,
 326       base::Bind(
 327           &MediaCaptureDevicesDispatcher::OnCreatingAudioStreamOnUIThread,
 328           base::Unretained(this), render_process_id, render_frame_id));
 329 }
 330
 331 void MediaCaptureDevicesDispatcher::NotifyAudioDevicesChangedOnUIThread() {
 332   MediaStreamDevices devices = GetAudioCaptureDevices();
 333   FOR_EACH_OBSERVER(Observer, observers_,
 334                     OnUpdateAudioDevices(devices));
 335 }
 336
 337 void MediaCaptureDevicesDispatcher::NotifyVideoDevicesChangedOnUIThread() {
 338   MediaStreamDevices devices = GetVideoCaptureDevices();
 339   FOR_EACH_OBSERVER(Observer, observers_,
 340                     OnUpdateVideoDevices(devices));
 341 }
 342
 343 void MediaCaptureDevicesDispatcher::UpdateMediaRequestStateOnUIThread(
 344     int render_process_id,
 345     int render_frame_id,
 346     int page_request_id,
 347     const GURL& security_origin,
 348     content::MediaStreamType stream_type,
 349     content::MediaRequestState state) {
 350   for (MediaAccessHandler* handler : media_access_handlers_) {
 351     if (handler->SupportsStreamType(stream_type, nullptr)) {
 352       handler->UpdateMediaRequestState(render_process_id, render_frame_id,
 353                                        page_request_id, stream_type, state);
 354       break;
 355     }
 356   }
 357
 358 #if defined(OS_CHROMEOS)
 359   if (IsOriginForCasting(security_origin) && IsVideoMediaType(stream_type)) {
 360     // Notify ash that casting state has changed.
 361     if (state == content::MEDIA_REQUEST_STATE_DONE) {
 362       ash::Shell::GetInstance()->OnCastingSessionStartedOrStopped(true);
 363     } else if (state == content::MEDIA_REQUEST_STATE_CLOSING) {
 364       ash::Shell::GetInstance()->OnCastingSessionStartedOrStopped(false);
 365     }
 366   }
 367 #endif
 368
 369   FOR_EACH_OBSERVER(Observer, observers_,
 370                     OnRequestUpdate(render_process_id,
 371                                     render_frame_id,
 372                                     stream_type,
 373                                     state));
 374 }
 375
 376 void MediaCaptureDevicesDispatcher::OnCreatingAudioStreamOnUIThread(
 377     int render_process_id,
 378     int render_frame_id) {
 379   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 380   FOR_EACH_OBSERVER(Observer, observers_,
 381                     OnCreatingAudioStream(render_process_id, render_frame_id));
 382 }
 383
 384 bool MediaCaptureDevicesDispatcher::IsDesktopCaptureInProgress() {
 385   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 386 #if defined(ENABLE_EXTENSIONS)
 387   for (MediaAccessHandler* handler : media_access_handlers_) {
 388     if (handler->SupportsStreamType(content::MEDIA_DESKTOP_VIDEO_CAPTURE,
 389                                     NULL)) {
 390       return ToDesktopCaptureAccessHandler(handler)->IsCaptureInProgress();
 391     }
 392   }
 393 #endif
 394   return false;
 395 }
 396
 397 void MediaCaptureDevicesDispatcher::SetTestAudioCaptureDevices(
 398     const MediaStreamDevices& devices) {
 399   test_audio_devices_ = devices;
 400 }
 401
 402 void MediaCaptureDevicesDispatcher::SetTestVideoCaptureDevices(
 403     const MediaStreamDevices& devices) {
 404   test_video_devices_ = devices;
 405 }