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nsSpeechTask.h (3308B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_dom_nsSpeechTask_h
      8 #define mozilla_dom_nsSpeechTask_h
      9 
     10 #include "AudioChannelAgent.h"
     11 #include "SpeechSynthesisUtterance.h"
     12 #include "nsISpeechService.h"
     13 #include "nsWeakReference.h"
     14 
     15 namespace mozilla {
     16 
     17 class SharedBuffer;
     18 
     19 namespace dom {
     20 
     21 class SpeechSynthesisUtterance;
     22 class SpeechSynthesis;
     23 
     24 class nsSpeechTask : public nsISpeechTask,
     25                     public nsIAudioChannelAgentCallback,
     26                     public nsSupportsWeakReference {
     27 public:
     28  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
     29  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsSpeechTask, nsISpeechTask)
     30 
     31  NS_DECL_NSISPEECHTASK
     32  NS_DECL_NSIAUDIOCHANNELAGENTCALLBACK
     33 
     34  explicit nsSpeechTask(SpeechSynthesisUtterance* aUtterance,
     35                        bool aShouldResistFingerprinting);
     36  nsSpeechTask(float aVolume, const nsAString& aText,
     37               bool aShouldResistFingerprinting);
     38 
     39  virtual void Pause();
     40 
     41  virtual void Resume();
     42 
     43  virtual void Cancel();
     44 
     45  virtual void ForceEnd();
     46 
     47  void SetSpeechSynthesis(SpeechSynthesis* aSpeechSynthesis);
     48 
     49  void Init();
     50 
     51  void SetChosenVoiceURI(const nsAString& aUri);
     52 
     53  virtual void SetAudioOutputVolume(float aVolume);
     54 
     55  void ForceError(float aElapsedTime, uint32_t aCharIndex);
     56 
     57  bool IsPreCanceled() { return mPreCanceled; };
     58 
     59  bool IsPrePaused() { return mPrePaused; }
     60 
     61  bool ShouldResistFingerprinting() { return mShouldResistFingerprinting; }
     62 
     63  enum { STATE_PENDING, STATE_SPEAKING, STATE_ENDED };
     64 
     65  uint32_t GetState() const { return mState; }
     66 
     67  bool IsSpeaking() const { return mState == STATE_SPEAKING; }
     68 
     69  bool IsPending() const { return mState == STATE_PENDING; }
     70 
     71 protected:
     72  virtual ~nsSpeechTask();
     73 
     74  nsresult DispatchStartImpl();
     75 
     76  virtual nsresult DispatchStartImpl(const nsAString& aUri);
     77 
     78  virtual nsresult DispatchEndImpl(float aElapsedTime, uint32_t aCharIndex);
     79 
     80  virtual nsresult DispatchPauseImpl(float aElapsedTime, uint32_t aCharIndex);
     81 
     82  virtual nsresult DispatchResumeImpl(float aElapsedTime, uint32_t aCharIndex);
     83 
     84  virtual nsresult DispatchErrorImpl(float aElapsedTime, uint32_t aCharIndex);
     85 
     86  virtual nsresult DispatchBoundaryImpl(const nsAString& aName,
     87                                        float aElapsedTime, uint32_t aCharIndex,
     88                                        uint32_t aCharLength, uint8_t argc);
     89 
     90  virtual nsresult DispatchMarkImpl(const nsAString& aName, float aElapsedTime,
     91                                    uint32_t aCharIndex);
     92 
     93  RefPtr<SpeechSynthesisUtterance> mUtterance;
     94 
     95  float mVolume;
     96 
     97  nsString mText;
     98 
     99  bool mInited;
    100 
    101  bool mPrePaused;
    102 
    103  bool mPreCanceled;
    104 
    105 private:
    106  void End();
    107 
    108  void CreateAudioChannelAgent();
    109 
    110  void DestroyAudioChannelAgent();
    111 
    112  nsCOMPtr<nsISpeechTaskCallback> mCallback;
    113 
    114  RefPtr<mozilla::dom::AudioChannelAgent> mAudioChannelAgent;
    115 
    116  RefPtr<SpeechSynthesis> mSpeechSynthesis;
    117 
    118  nsString mChosenVoiceURI;
    119 
    120  bool mShouldResistFingerprinting;
    121 
    122  uint32_t mState;
    123 };
    124 
    125 }  // namespace dom
    126 }  // namespace mozilla
    127 
    128 #endif