content/browser/renderer_host/media/media_capture_devices_impl.cc

   1 // Copyright 2014 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/renderer_host/media/media_capture_devices_impl.h"
   6
   7 #include "content/browser/browser_main_loop.h"
   8 #include "content/browser/renderer_host/media/media_stream_manager.h"
   9 #include "content/public/browser/browser_thread.h"
  10
  11 namespace content {
  12
  13 namespace {
  14
  15 void EnsureMonitorCaptureDevices() {
  16   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  17   BrowserThread::PostTask(
  18       BrowserThread::IO, FROM_HERE,
  19       base::Bind(&MediaStreamManager::EnsureDeviceMonitorStarted,
  20                  base::Unretained(
  21                      BrowserMainLoop::GetInstance()->media_stream_manager())));
  22 }
  23
  24 }  // namespace
  25
  26 MediaCaptureDevices* MediaCaptureDevices::GetInstance() {
  27   return MediaCaptureDevicesImpl::GetInstance();
  28 }
  29
  30 MediaCaptureDevicesImpl* MediaCaptureDevicesImpl::GetInstance() {
  31   return Singleton<MediaCaptureDevicesImpl>::get();
  32 }
  33
  34 const MediaStreamDevices&
  35 MediaCaptureDevicesImpl::GetAudioCaptureDevices() {
  36   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  37   if (!devices_enumerated_) {
  38     EnsureMonitorCaptureDevices();
  39     devices_enumerated_ = true;
  40   }
  41   return audio_devices_;
  42 }
  43
  44 const MediaStreamDevices&
  45 MediaCaptureDevicesImpl::GetVideoCaptureDevices() {
  46   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  47   if (!devices_enumerated_) {
  48     EnsureMonitorCaptureDevices();
  49     devices_enumerated_ = true;
  50   }
  51   return video_devices_;
  52 }
  53
  54 void MediaCaptureDevicesImpl::OnAudioCaptureDevicesChanged(
  55     const MediaStreamDevices& devices) {
  56   if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
  57     UpdateAudioDevicesOnUIThread(devices);
  58   } else {
  59     BrowserThread::PostTask(
  60         BrowserThread::UI, FROM_HERE,
  61         base::Bind(&MediaCaptureDevicesImpl::UpdateAudioDevicesOnUIThread,
  62                    base::Unretained(this), devices));
  63   }
  64 }
  65
  66 void MediaCaptureDevicesImpl::OnVideoCaptureDevicesChanged(
  67     const MediaStreamDevices& devices) {
  68   if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
  69     UpdateVideoDevicesOnUIThread(devices);
  70   } else {
  71     BrowserThread::PostTask(
  72         BrowserThread::UI, FROM_HERE,
  73         base::Bind(&MediaCaptureDevicesImpl::UpdateVideoDevicesOnUIThread,
  74                    base::Unretained(this), devices));
  75   }
  76 }
  77
  78 MediaCaptureDevicesImpl::MediaCaptureDevicesImpl()
  79     : devices_enumerated_(false) {
  80 }
  81
  82 MediaCaptureDevicesImpl::~MediaCaptureDevicesImpl() {
  83 }
  84
  85 void MediaCaptureDevicesImpl::UpdateAudioDevicesOnUIThread(
  86     const MediaStreamDevices& devices) {
  87   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  88   devices_enumerated_ = true;
  89   audio_devices_ = devices;
  90 }
  91
  92 void MediaCaptureDevicesImpl::UpdateVideoDevicesOnUIThread(
  93     const MediaStreamDevices& devices) {
  94   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  95   devices_enumerated_ = true;
  96   video_devices_ = devices;
  97 }
  98
  99 }  // namespace content