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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_ANDROID_H_
#define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_ANDROID_H_
#include <jni.h>
#include "base/android/scoped_java_ref.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "content/browser/speech/speech_recognizer.h"
#include "content/public/common/speech_recognition_error.h"
#include "content/public/common/speech_recognition_result.h"
namespace content {
class SpeechRecognitionEventListener;
class CONTENT_EXPORT SpeechRecognizerImplAndroid : public SpeechRecognizer {
public:
SpeechRecognizerImplAndroid(SpeechRecognitionEventListener* listener,
int session_id);
// SpeechRecognizer methods.
virtual void StartRecognition(const std::string& device_id) OVERRIDE;
virtual void AbortRecognition() OVERRIDE;
virtual void StopAudioCapture() OVERRIDE;
virtual bool IsActive() const OVERRIDE;
virtual bool IsCapturingAudio() const OVERRIDE;
// Called from Java methods via JNI.
void OnAudioStart(JNIEnv* env, jobject obj);
void OnSoundStart(JNIEnv* env, jobject obj);
void OnSoundEnd(JNIEnv* env, jobject obj);
void OnAudioEnd(JNIEnv* env, jobject obj);
void OnRecognitionResults(JNIEnv* env, jobject obj, jobjectArray strings,
jfloatArray floats, jboolean interim);
void OnRecognitionError(JNIEnv* env, jobject obj, jint error);
void OnRecognitionEnd(JNIEnv* env, jobject obj);
static bool RegisterSpeechRecognizer(JNIEnv* env);
private:
enum State {
STATE_IDLE = 0,
STATE_CAPTURING_AUDIO,
STATE_AWAITING_FINAL_RESULT
};
void StartRecognitionOnUIThread(
std::string language, bool continuous, bool interim_results);
void OnRecognitionResultsOnIOThread(SpeechRecognitionResults const &results);
virtual ~SpeechRecognizerImplAndroid();
base::android::ScopedJavaGlobalRef<jobject> j_recognition_;
State state_;
DISALLOW_COPY_AND_ASSIGN(SpeechRecognizerImplAndroid);
};
} // namespace content
#endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_ANDROID_H_
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