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/*
* libjingle
* Copyright 2012 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_APP_WEBRTC_DTMFSENDER_H_
#define TALK_APP_WEBRTC_DTMFSENDER_H_
#include <string>
#include "talk/app/webrtc/dtmfsenderinterface.h"
#include "talk/app/webrtc/mediastreaminterface.h"
#include "talk/app/webrtc/proxy.h"
#include "webrtc/base/common.h"
#include "webrtc/base/messagehandler.h"
#include "webrtc/base/refcount.h"
// DtmfSender is the native implementation of the RTCDTMFSender defined by
// the WebRTC W3C Editor's Draft.
// http://dev.w3.org/2011/webrtc/editor/webrtc.html
namespace rtc {
class Thread;
}
namespace webrtc {
// This interface is called by DtmfSender to talk to the actual audio channel
// to send DTMF.
class DtmfProviderInterface {
public:
// Returns true if the audio track with given id (|track_id|) is capable
// of sending DTMF. Otherwise returns false.
virtual bool CanInsertDtmf(const std::string& track_id) = 0;
// Sends DTMF |code| via the audio track with given id (|track_id|).
// The |duration| indicates the length of the DTMF tone in ms.
// Returns true on success and false on failure.
virtual bool InsertDtmf(const std::string& track_id,
int code, int duration) = 0;
// Returns a |sigslot::signal0<>| signal. The signal should fire before
// the provider is destroyed.
virtual sigslot::signal0<>* GetOnDestroyedSignal() = 0;
protected:
virtual ~DtmfProviderInterface() {}
};
class DtmfSender
: public DtmfSenderInterface,
public sigslot::has_slots<>,
public rtc::MessageHandler {
public:
static rtc::scoped_refptr<DtmfSender> Create(
AudioTrackInterface* track,
rtc::Thread* signaling_thread,
DtmfProviderInterface* provider);
// Implements DtmfSenderInterface.
void RegisterObserver(DtmfSenderObserverInterface* observer) override;
void UnregisterObserver() override;
bool CanInsertDtmf() override;
bool InsertDtmf(const std::string& tones,
int duration,
int inter_tone_gap) override;
const AudioTrackInterface* track() const override;
std::string tones() const override;
int duration() const override;
int inter_tone_gap() const override;
protected:
DtmfSender(AudioTrackInterface* track,
rtc::Thread* signaling_thread,
DtmfProviderInterface* provider);
virtual ~DtmfSender();
private:
DtmfSender();
// Implements MessageHandler.
virtual void OnMessage(rtc::Message* msg);
// The DTMF sending task.
void DoInsertDtmf();
void OnProviderDestroyed();
void StopSending();
rtc::scoped_refptr<AudioTrackInterface> track_;
DtmfSenderObserverInterface* observer_;
rtc::Thread* signaling_thread_;
DtmfProviderInterface* provider_;
std::string tones_;
int duration_;
int inter_tone_gap_;
RTC_DISALLOW_COPY_AND_ASSIGN(DtmfSender);
};
// Define proxy for DtmfSenderInterface.
BEGIN_PROXY_MAP(DtmfSender)
PROXY_METHOD1(void, RegisterObserver, DtmfSenderObserverInterface*)
PROXY_METHOD0(void, UnregisterObserver)
PROXY_METHOD0(bool, CanInsertDtmf)
PROXY_METHOD3(bool, InsertDtmf, const std::string&, int, int)
PROXY_CONSTMETHOD0(const AudioTrackInterface*, track)
PROXY_CONSTMETHOD0(std::string, tones)
PROXY_CONSTMETHOD0(int, duration)
PROXY_CONSTMETHOD0(int, inter_tone_gap)
END_PROXY()
// Get DTMF code from the DTMF event character.
bool GetDtmfCode(char tone, int* code);
} // namespace webrtc
#endif // TALK_APP_WEBRTC_DTMFSENDER_H_
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