1 // Copyright 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_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_ANDROID_H_ 6 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_ANDROID_H_ 7 8 #include <jni.h> 9 10 #include "base/android/scoped_java_ref.h" 11 #include "base/memory/ref_counted.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "content/browser/speech/speech_recognizer.h" 14 #include "content/public/common/speech_recognition_error.h" 15 #include "content/public/common/speech_recognition_result.h" 16 17 namespace content { 18 19 class SpeechRecognitionEventListener; 20 21 class CONTENT_EXPORT SpeechRecognizerImplAndroid : public SpeechRecognizer { 22 public: 23 SpeechRecognizerImplAndroid(SpeechRecognitionEventListener* listener, 24 int session_id); 25 26 // SpeechRecognizer methods. 27 virtual void StartRecognition(const std::string& device_id) OVERRIDE; 28 virtual void AbortRecognition() OVERRIDE; 29 virtual void StopAudioCapture() OVERRIDE; 30 virtual bool IsActive() const OVERRIDE; 31 virtual bool IsCapturingAudio() const OVERRIDE; 32 33 // Called from Java methods via JNI. 34 void OnAudioStart(JNIEnv* env, jobject obj); 35 void OnSoundStart(JNIEnv* env, jobject obj); 36 void OnSoundEnd(JNIEnv* env, jobject obj); 37 void OnAudioEnd(JNIEnv* env, jobject obj); 38 void OnRecognitionResults(JNIEnv* env, jobject obj, jobjectArray strings, 39 jfloatArray floats, jboolean interim); 40 void OnRecognitionError(JNIEnv* env, jobject obj, jint error); 41 void OnRecognitionEnd(JNIEnv* env, jobject obj); 42 43 static bool RegisterSpeechRecognizer(JNIEnv* env); 44 45 private: 46 enum State { 47 STATE_IDLE = 0, 48 STATE_CAPTURING_AUDIO, 49 STATE_AWAITING_FINAL_RESULT 50 }; 51 52 void StartRecognitionOnUIThread( 53 std::string language, bool continuous, bool interim_results); 54 void OnRecognitionResultsOnIOThread(SpeechRecognitionResults const &results); 55 56 virtual ~SpeechRecognizerImplAndroid(); 57 58 base::android::ScopedJavaGlobalRef<jobject> j_recognition_; 59 State state_; 60 61 DISALLOW_COPY_AND_ASSIGN(SpeechRecognizerImplAndroid); 62 }; 63 64 } // namespace content 65 66 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_ANDROID_H_ 67