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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_RTC_DTMF_SENDER_HANDLER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_RTC_DTMF_SENDER_HANDLER_H_
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/webrtc/api/dtmf_sender_interface.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace webrtc {
class DtmfSenderInterface;
}
namespace blink {
// RtcDtmfSenderHandler is a delegate for the RTC DTMF Sender API messages
// going between WebKit and native DTMF Sender in libjingle.
// Instances of this class are owned by WebKit.
// WebKit call all of these methods on the main render thread.
// Callbacks to the webrtc::DtmfSenderObserverInterface implementation also
// occur on the main render thread.
class PLATFORM_EXPORT RtcDtmfSenderHandler final {
public:
class PLATFORM_EXPORT Client : public GarbageCollectedMixin {
public:
virtual ~Client() = default;
virtual void DidPlayTone(const String& tone) = 0;
void Trace(Visitor* visitor) const override {}
};
RtcDtmfSenderHandler(scoped_refptr<base::SingleThreadTaskRunner> main_thread,
webrtc::DtmfSenderInterface* dtmf_sender);
RtcDtmfSenderHandler(const RtcDtmfSenderHandler&) = delete;
RtcDtmfSenderHandler& operator=(const RtcDtmfSenderHandler&) = delete;
~RtcDtmfSenderHandler();
void SetClient(RtcDtmfSenderHandler::Client* client);
String CurrentToneBuffer();
bool CanInsertDTMF();
bool InsertDTMF(const String& tones, int duration, int inter_tone_gap);
void OnToneChange(const String& tone);
private:
scoped_refptr<webrtc::DtmfSenderInterface> dtmf_sender_;
WeakPersistent<RtcDtmfSenderHandler::Client> webkit_client_;
class Observer;
scoped_refptr<Observer> observer_;
SEQUENCE_CHECKER(sequence_checker_);
// |weak_factory_| must be the last member.
base::WeakPtrFactory<RtcDtmfSenderHandler> weak_factory_{this};
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_RTC_DTMF_SENDER_HANDLER_H_
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