SpeechRecognitionChild.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8  et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef DOM_MEDIA_WEBSPEECH_RECOGNITION_SPEECHRECOGNITIONCHILD_H_

#define DOM_MEDIA_WEBSPEECH_RECOGNITION_SPEECHRECOGNITIONCHILD_H_

#include <functional>

#include "mozilla/RefPtr.h"

#include "mozilla/TimeStamp.h"

#include "mozilla/hwinference/PSpeechRecognitionChild.h"

#include "nsISupportsImpl.h"

namespace mozilla::dom {

class SpeechRecognitionIPCActorUserGuard;

namespace mozilla::hwinference {

class SpeechRecognitionChild final : public PSpeechRecognitionChild {

 public:

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SpeechRecognitionChild, override)

  using RecognitionResultCallback =

      std::function<void(const nsCString&, bool, float, TimeStamp)>;

  using RecognitionErrorCallback = std::function<void(const nsCString&)>;

  using SpeechChangeCallback = std::function<void(bool, TimeStamp)>;

  using DestroyedCallback = std::function<void(SpeechRecognitionChild*)>;

  explicit SpeechRecognitionChild(

      already_AddRefed<dom::SpeechRecognitionIPCActorUserGuard>

          aIPCActorUserGuard);

  void SetResultCallback(RecognitionResultCallback&& aCallback);

  void SetErrorCallback(RecognitionErrorCallback&& aCallback);

  void SetSpeechChangeCallback(SpeechChangeCallback&& aCallback);

  // Invoked from ActorDestroy(), including when the actor is torn down from

  // the other side (utility process crash/channel close), so the owner can

  // drop its reference instead of continuing to send through a dead actor.

  void SetDestroyedCallback(DestroyedCallback&& aCallback);

  mozilla::ipc::IPCResult RecvOnRecognitionResult(const nsCString& aTranscript,

                                                  const bool& aIsFinal,

                                                  const float& aConfidence,

                                                  const TimeStamp& aEventTime);

  mozilla::ipc::IPCResult RecvOnRecognitionError(const nsCString& aError);

  mozilla::ipc::IPCResult RecvOnSpeechChange(const bool& aSpeechDetected,

                                             const TimeStamp& aEventTime);

  void ActorDestroy(ActorDestroyReason aReason) override;

 private:

  ~SpeechRecognitionChild();

  RecognitionResultCallback mResultCallback;

  RecognitionErrorCallback mErrorCallback;

  SpeechChangeCallback mSpeechChangeCallback;

  DestroyedCallback mDestroyedCallback;

  RefPtr<dom::SpeechRecognitionIPCActorUserGuard> mIPCActorUserGuard;

};

}  // namespace mozilla::hwinference

#endif  // DOM_MEDIA_WEBSPEECH_RECOGNITION_SPEECHRECOGNITIONCHILD_H_