src/content/renderer/media/rtc_dtmf_sender_handler.h

   1 // Copyright (c) 2013 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 #ifndef CONTENT_RENDERER_MEDIA_RTC_DTMF_SENDER_HANDLER_H_
   6 #define CONTENT_RENDERER_MEDIA_RTC_DTMF_SENDER_HANDLER_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/threading/non_thread_safe.h"
  13 #include "content/common/content_export.h"
  14 #include "third_party/WebKit/public/platform/WebRTCDTMFSenderHandler.h"
  15 #include "third_party/WebKit/public/platform/WebRTCDTMFSenderHandlerClient.h"
  16 #include "third_party/libjingle/source/talk/app/webrtc/dtmfsenderinterface.h"
  17
  18 namespace content {
  19
  20 // RtcDtmfSenderHandler is a delegate for the RTC DTMF Sender API messages
  21 // going between WebKit and native DTMF Sender in libjingle.
  22 // Instances of this class are owned by WebKit.
  23 // WebKit call all of these methods on the main render thread.
  24 // Callbacks to the webrtc::DtmfSenderObserverInterface implementation also
  25 // occur on the main render thread.
  26 class CONTENT_EXPORT RtcDtmfSenderHandler
  27     : NON_EXPORTED_BASE(public blink::WebRTCDTMFSenderHandler),
  28       NON_EXPORTED_BASE(public base::NonThreadSafe) {
  29  public:
  30   explicit RtcDtmfSenderHandler(webrtc::DtmfSenderInterface* dtmf_sender);
  31   virtual ~RtcDtmfSenderHandler();
  32
  33   // blink::WebRTCDTMFSenderHandler implementation.
  34   void setClient(
  35       blink::WebRTCDTMFSenderHandlerClient* client) override;
  36   blink::WebString currentToneBuffer() override;
  37   bool canInsertDTMF() override;
  38   bool insertDTMF(const blink::WebString& tones, long duration,
  39                           long interToneGap) override;
  40
  41   void OnToneChange(const std::string& tone);
  42
  43  private:
  44   scoped_refptr<webrtc::DtmfSenderInterface> dtmf_sender_;
  45   blink::WebRTCDTMFSenderHandlerClient* webkit_client_;
  46   base::WeakPtrFactory<RtcDtmfSenderHandler> weak_factory_;
  47   class Observer;
  48   scoped_refptr<Observer> observer_;  // must be after weak_factory_
  49
  50   DISALLOW_COPY_AND_ASSIGN(RtcDtmfSenderHandler);
  51 };
  52
  53 }  // namespace content
  54
  55 #endif  // CONTENT_RENDERER_MEDIA_RTC_DTMF_SENDER_HANDLER_H_
  56