Media Related changes for TabCapture API

content/browser/renderer_host/media/media_stream_manager.cc

Index: content/browser/renderer_host/media/media_stream_manager.cc
diff --git a/content/browser/renderer_host/media/media_stream_manager.cc b/content/browser/renderer_host/media/media_stream_manager.cc
index f35795252c46127548d77e93a667a0460b0a487b..5fea2cd3d4de857911cc9cdbd2fdacb217c78bab 100644
--- a/content/browser/renderer_host/media/media_stream_manager.cc
+++ b/content/browser/renderer_host/media/media_stream_manager.cc
@@ -25,6 +25,7 @@
 #endif
 
 using content::BrowserThread;
+using content::MediaStreamRequest;
 
 namespace media_stream {
 
@@ -73,16 +74,8 @@ void DeviceThread::CleanUp() {
 #endif
 
 // TODO(xians): Merge DeviceRequest with MediaStreamRequest.
-struct MediaStreamManager::DeviceRequest {
-  enum RequestState {
-    STATE_NOT_REQUESTED = 0,
-    STATE_REQUESTED,
-    STATE_PENDING_APPROVAL,
-    STATE_OPENING,
-    STATE_DONE,
-    STATE_ERROR
-  };
-
+class MediaStreamManager::DeviceRequest {
+ public:
   enum RequestType {
     GENERATE_STREAM = 0,
     ENUMERATE_DEVICES,
@@ -91,10 +84,11 @@ struct MediaStreamManager::DeviceRequest {
 
   DeviceRequest()
       : requester(NULL),
-        state(content::NUM_MEDIA_TYPES, STATE_NOT_REQUESTED),
         type(GENERATE_STREAM),
         render_process_id(-1),
-        render_view_id(-1) {
+        render_view_id(-1),
+        state_(content::NUM_MEDIA_TYPES,
+               MediaStreamRequest::STATE_NOT_REQUESTED) {
   }
 
   DeviceRequest(MediaStreamRequester* requester,
@@ -104,11 +98,12 @@ struct MediaStreamManager::DeviceRequest {
                 const GURL& request_security_origin)
       : requester(requester),
         options(request_options),
-        state(content::NUM_MEDIA_TYPES, STATE_NOT_REQUESTED),
         type(GENERATE_STREAM),
         render_process_id(render_process_id),
         render_view_id(render_view_id),
-        security_origin(request_security_origin) {
+        security_origin(request_security_origin),
+        state_(content::NUM_MEDIA_TYPES,
+               MediaStreamRequest::STATE_NOT_REQUESTED) {
     DCHECK(requester);
   }
 
@@ -116,15 +111,46 @@ struct MediaStreamManager::DeviceRequest {
 
   MediaStreamRequester* requester;
   StreamOptions options;
-  std::vector<RequestState> state;
   RequestType type;
   int render_process_id;
   int render_view_id;
   GURL security_origin;
   std::string requested_device_id;
   StreamDeviceInfoArray devices;
+
+  void setState(MediaStreamType stream_type,
+                MediaStreamRequest::RequestState new_state) {
+    state_[stream_type] = new_state;
+  }
+
+  MediaStreamRequest::RequestState getState(MediaStreamType stream_type) const {
+    return state_[stream_type];
+  }
+
+ private:
+  std::vector<MediaStreamRequest::RequestState> state_;
 };
 
+// Helper to update the request state and notify observers.
+static void UpdateRequestState(
+    MediaStreamManager::DeviceRequest* request,
+    MediaStreamType stream_type,
+    const MediaStreamRequest::RequestState new_state) {
+  request->setState(stream_type, new_state);
+
+  content::MediaObserver* media_observer =
+    content::GetContentClient()->browser()->GetMediaObserver();
+  if (media_observer == NULL)
+    return;
+  media_observer->OnMediaRequestStateChanged(
+    request->render_process_id,
+    request->render_view_id,
+    content::MediaStreamDevice(stream_type,
+                               request->requested_device_id,
+                               request->requested_device_id),
+    new_state);
+}
+
 MediaStreamManager::EnumerationCache::EnumerationCache()
     : valid(false) {
 }
@@ -207,6 +233,7 @@ void MediaStreamManager::GenerateStreamForDevice(
                            security_origin),
              label);
   DeviceRequest& request = requests_[*label];
+  request.requested_device_id = device_id;
 
   // Get user confirmation to use the capture device.
   device_settings_->RequestCaptureDeviceUsage(*label,
@@ -219,18 +246,16 @@ void MediaStreamManager::GenerateStreamForDevice(
   // this currently exists.  Also, we don't have a user-friendly device name for
   // the infobar UI.
   if (content::IsAudioMediaType(options.audio_type)) {
-    request.state[options.audio_type] = DeviceRequest::STATE_PENDING_APPROVAL;
-    device_settings_->AvailableDevices(
-        *label, options.audio_type, StreamDeviceInfoArray(
-            1, StreamDeviceInfo(options.audio_type, device_id, device_id,
-                                false)));
+    UpdateRequestState(&request, options.audio_type,
+                       MediaStreamRequest::STATE_PENDING_APPROVAL);
+      DevicesAccepted(*label, StreamDeviceInfoArray(1,
+          StreamDeviceInfo(options.audio_type, device_id, device_id, false)));
   }
   if (content::IsVideoMediaType(options.video_type)) {
-    request.state[options.video_type] = DeviceRequest::STATE_PENDING_APPROVAL;
-    device_settings_->AvailableDevices(
-        *label, options.video_type, StreamDeviceInfoArray(
-            1, StreamDeviceInfo(options.video_type, device_id, device_id,
-                                false)));
+    UpdateRequestState(&request, options.video_type,
+                       MediaStreamRequest::STATE_PENDING_APPROVAL);
+    DevicesAccepted(*label, StreamDeviceInfoArray(1,
+        StreamDeviceInfo(options.video_type, device_id, device_id, false)));
   }
 }
 
@@ -245,7 +270,8 @@ void MediaStreamManager::CancelGenerateStream(const std::string& label) {
       for (int i = content::MEDIA_NO_SERVICE + 1; i < content::NUM_MEDIA_TYPES;
            ++i) {
         const MediaStreamType stream_type = static_cast<MediaStreamType>(i);
-        if (request.state[stream_type] != DeviceRequest::STATE_OPENING) {
+        if (request.getState(stream_type) !=
+            MediaStreamRequest::STATE_OPENING) {
           continue;
         }
         for (StreamDeviceInfoArray::const_iterator device_it =
@@ -280,6 +306,12 @@ void MediaStreamManager::StopGeneratedStream(const std::string& label) {
     }
     if (it->second.type == DeviceRequest::GENERATE_STREAM &&
         RequestDone(it->second)) {
+      // Notify observers that this device is being closed.
+      for (MediaStreamType i = content::MEDIA_NO_SERVICE;
+           i != content::NUM_MEDIA_TYPES; ++i) {
+        if (it->second.getState(i) != MediaStreamRequest::STATE_NOT_REQUESTED)
+          UpdateRequestState(&it->second, i, MediaStreamRequest::STATE_CLOSING);
+      }
       NotifyObserverDevicesClosed(&(it->second));
     }
     requests_.erase(it);
@@ -319,7 +351,8 @@ void MediaStreamManager::EnumerateDevices(
 
   if (cache->valid) {
     // Cached device list of this type exists. Just send it out.
-    new_request.state[type] = DeviceRequest::STATE_REQUESTED;
+    UpdateRequestState(&new_request, type,
+                       MediaStreamRequest::STATE_REQUESTED);
     AddRequest(new_request, label);
     // Need to post a task since the requester won't have label till
     // this function returns.
@@ -423,7 +456,8 @@ void MediaStreamManager::StartEnumeration(
        ++i) {
     const MediaStreamType stream_type = static_cast<MediaStreamType>(i);
     if (Requested(new_request->options, stream_type)) {
-      new_request->state[stream_type] = DeviceRequest::STATE_REQUESTED;
+      UpdateRequestState(new_request, stream_type,
+                         MediaStreamRequest::STATE_REQUESTED);
       DCHECK_GE(active_enumeration_ref_count_[stream_type], 0);
       if (active_enumeration_ref_count_[stream_type] == 0) {
         ++active_enumeration_ref_count_[stream_type];
@@ -502,7 +536,8 @@ void MediaStreamManager::Opened(MediaStreamType stream_type,
     return;
   }
 
-  DCHECK_NE(request->state[stream_type], DeviceRequest::STATE_REQUESTED);
+  DCHECK_NE(request->getState(stream_type),
+            MediaStreamRequest::STATE_REQUESTED);
 
   // Check if all devices for this stream type are opened. Update the state if
   // they are.
@@ -516,7 +551,8 @@ void MediaStreamManager::Opened(MediaStreamType stream_type,
       return;
     }
   }
-  request->state[stream_type] = DeviceRequest::STATE_DONE;
+
+  UpdateRequestState(request, stream_type, MediaStreamRequest::STATE_DONE);
 
   if (!RequestDone(*request)) {
     // This stream_type is done, but not the other type.
@@ -583,10 +619,12 @@ void MediaStreamManager::DevicesEnumerated(
   std::list<std::string> label_list;
   for (DeviceRequests::iterator it = requests_.begin(); it != requests_.end();
        ++it) {
-    if (it->second.state[stream_type] == DeviceRequest::STATE_REQUESTED &&
+    if (it->second.getState(stream_type) ==
+        MediaStreamRequest::STATE_REQUESTED &&
         Requested(it->second.options, stream_type)) {
       if (it->second.type != DeviceRequest::ENUMERATE_DEVICES)
-        it->second.state[stream_type] = DeviceRequest::STATE_PENDING_APPROVAL;
+        UpdateRequestState(&it->second, stream_type,
+                           MediaStreamRequest::STATE_PENDING_APPROVAL);
       label_list.push_back(it->first);
     }
   }
@@ -607,8 +645,8 @@ void MediaStreamManager::DevicesEnumerated(
             device.in_use = false;
             device.session_id =
                 GetDeviceManager(device_it->stream_type)->Open(device);
-            request.state[device_it->stream_type] =
-                DeviceRequest::STATE_OPENING;
+            UpdateRequestState(&request, device_it->stream_type,
+                               MediaStreamRequest::STATE_OPENING);
             request.devices.push_back(device);
             break;
           }
@@ -656,8 +694,9 @@ void MediaStreamManager::Error(MediaStreamType stream_type,
       // We've found the failing device. Find the error case:
       // An error should only be reported to the MediaStreamManager if
       // the request has not been fulfilled yet.
-      DCHECK(it->second.state[stream_type] != DeviceRequest::STATE_DONE);
-      if (it->second.state[stream_type] != DeviceRequest::STATE_DONE) {
+      DCHECK(it->second.getState(stream_type)
+             != MediaStreamRequest::STATE_DONE);
+      if (it->second.getState(stream_type) != MediaStreamRequest::STATE_DONE) {
         // Request is not done, devices are not opened in this case.
         if (devices.size() <= 1) {
           // 1. Device not opened and no other devices for this request ->
@@ -701,12 +740,14 @@ void MediaStreamManager::DevicesAccepted(const std::string& label,
     // Set in_use to false to be able to track if this device has been
     // opened. in_use might be true if the device type can be used in more
     // than one session.
-    DCHECK_EQ(request.state[device_it->stream_type],
-              DeviceRequest::STATE_PENDING_APPROVAL);
+    DCHECK_EQ(request.getState(device_it->stream_type),
+              MediaStreamRequest::STATE_PENDING_APPROVAL);
     device_info.in_use = false;
+
     device_info.session_id =
         GetDeviceManager(device_info.stream_type)->Open(device_info);
-    request.state[device_it->stream_type] = DeviceRequest::STATE_OPENING;
+    UpdateRequestState(&request, device_it->stream_type,
+                       MediaStreamRequest::STATE_OPENING);
     request.devices.push_back(device_info);
 
     if (device_info.stream_type == request.options.audio_type) {
@@ -718,10 +759,12 @@ void MediaStreamManager::DevicesAccepted(const std::string& label,
 
   // Check whether we've received all stream types requested.
   if (!found_audio && content::IsAudioMediaType(request.options.audio_type)) {
-    request.state[request.options.audio_type] = DeviceRequest::STATE_ERROR;
+    UpdateRequestState(&request, request.options.audio_type,
+                       MediaStreamRequest::STATE_ERROR);
   }
   if (!found_video && content::IsVideoMediaType(request.options.video_type)) {
-    request.state[request.options.video_type] = DeviceRequest::STATE_ERROR;
+    UpdateRequestState(&request, request.options.video_type,
+                       MediaStreamRequest::STATE_ERROR);
   }
 }
 
@@ -805,17 +848,19 @@ bool MediaStreamManager::RequestDone(const DeviceRequest& request) const {
       content::IsVideoMediaType(request.options.video_type);
 
   const bool audio_done =
-      !requested_audio ||
-      request.state[request.options.audio_type] == DeviceRequest::STATE_DONE ||
-      request.state[request.options.audio_type] == DeviceRequest::STATE_ERROR;
+      !requested_audio || request.getState(request.options.audio_type) ==
+      MediaStreamRequest::STATE_DONE ||
+      request.getState(request.options.audio_type) ==
+      MediaStreamRequest::STATE_ERROR;
   if (!audio_done) {
     return false;
   }
 
   const bool video_done =
-      !requested_video ||
-      request.state[request.options.video_type] == DeviceRequest::STATE_DONE ||
-      request.state[request.options.video_type] == DeviceRequest::STATE_ERROR;
+      !requested_video || request.getState(request.options.video_type) ==
+      MediaStreamRequest::STATE_DONE ||
+      request.getState(request.options.video_type) ==
+      MediaStreamRequest::STATE_ERROR;
   if (!video_done) {
     return false;
   }