Support audio output device enumeration and selection in PPAPI

content/renderer/pepper/pepper_media_device_manager.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/pepper/pepper_media_device_manager.h"
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/renderer/media/media_devices_event_dispatcher.h"
 #include "content/renderer/media/media_stream_dispatcher.h"
 #include "content/renderer/render_frame_impl.h"
 #include "media/media_features.h"
 #include "ppapi/shared_impl/ppb_device_ref_shared.h"
 #include "services/service_manager/public/cpp/interface_provider.h"
 
 namespace content {
 
 namespace {
 
 PP_DeviceType_Dev FromMediaDeviceType(MediaDeviceType type) {
   switch (type) {
     case MEDIA_DEVICE_TYPE_AUDIO_INPUT:
       return PP_DEVICETYPE_DEV_AUDIOCAPTURE;
     case MEDIA_DEVICE_TYPE_VIDEO_INPUT:
       return PP_DEVICETYPE_DEV_VIDEOCAPTURE;
+    case MEDIA_DEVICE_TYPE_AUDIO_OUTPUT:
+      return PP_DEVICETYPE_DEV_AUDIOOUTPUT;
     default:
       NOTREACHED();
       return PP_DEVICETYPE_DEV_INVALID;
   }
 }
 
 MediaDeviceType ToMediaDeviceType(PP_DeviceType_Dev type) {
   switch (type) {
     case PP_DEVICETYPE_DEV_AUDIOCAPTURE:
       return MEDIA_DEVICE_TYPE_AUDIO_INPUT;
     case PP_DEVICETYPE_DEV_VIDEOCAPTURE:
       return MEDIA_DEVICE_TYPE_VIDEO_INPUT;
+    case PP_DEVICETYPE_DEV_AUDIOOUTPUT:
+      return MEDIA_DEVICE_TYPE_AUDIO_OUTPUT;
     default:
       NOTREACHED();
       return MEDIA_DEVICE_TYPE_AUDIO_OUTPUT;
   }
 }
 
 ppapi::DeviceRefData FromMediaDeviceInfo(MediaDeviceType type,
                                          const MediaDeviceInfo& info) {
   ppapi::DeviceRefData data;
   data.id = info.device_id;
@@ skipping 25 matching lines @@
   DCHECK(open_callbacks_.empty());
 }
 
 void PepperMediaDeviceManager::EnumerateDevices(
     PP_DeviceType_Dev type,
     const GURL& document_url,
     const DevicesCallback& callback) {
 #if BUILDFLAG(ENABLE_WEBRTC)
   bool request_audio_input = type == PP_DEVICETYPE_DEV_AUDIOCAPTURE;
   bool request_video_input = type == PP_DEVICETYPE_DEV_VIDEOCAPTURE;
-  CHECK(request_audio_input || request_video_input);
+  bool request_audio_output = type == PP_DEVICETYPE_DEV_AUDIOOUTPUT;
+  CHECK(request_audio_input || request_video_input || request_audio_output);
   GetMediaDevicesDispatcher()->EnumerateDevices(
-      request_audio_input, request_video_input, false /* audio_output */,
+      request_audio_input, request_video_input, request_audio_output,
       url::Origin(document_url.GetOrigin()),
       base::Bind(&PepperMediaDeviceManager::DevicesEnumerated, AsWeakPtr(),
                  callback, ToMediaDeviceType(type)));
 #else
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(&PepperMediaDeviceManager::DevicesEnumerated,
                             AsWeakPtr(), callback, ToMediaDeviceType(type),
                             std::vector<MediaDeviceInfoArray>()));
 #endif
 }
@@ skipping 169 matching lines @@
   }
 
   return media_devices_dispatcher_;
 }
 
 void PepperMediaDeviceManager::OnDestruct() {
   delete this;
 }
 
 }  // namespace content