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// Copyright (c) 2012 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_RECOGNITION_MANAGER_IMPL_H_
#define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_MANAGER_IMPL_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/singleton.h"
#include "content/public/browser/speech_recognition_event_listener.h"
#include "content/public/browser/speech_recognition_manager.h"
#include "ui/gfx/rect.h"
namespace content {
class ResourceContext;
class SpeechRecognitionManagerDelegate;
class SpeechRecognitionPreferences;
struct SpeechRecognitionResult;
class SpeechRecognizer;
}
namespace net {
class URLRequestContextGetter;
}
namespace speech {
class InputTagSpeechDispatcherHost;
class CONTENT_EXPORT SpeechRecognitionManagerImpl
: NON_EXPORTED_BASE(public content::SpeechRecognitionManager),
NON_EXPORTED_BASE(public content::SpeechRecognitionEventListener) {
public:
static SpeechRecognitionManagerImpl* GetInstance();
// SpeechRecognitionManager implementation:
virtual void StartRecognitionForRequest(int session_id) OVERRIDE;
virtual void CancelRecognitionForRequest(int session_id) OVERRIDE;
virtual void FocusLostForRequest(int session_id) OVERRIDE;
virtual bool HasAudioInputDevices() OVERRIDE;
virtual bool IsCapturingAudio() OVERRIDE;
virtual string16 GetAudioInputDeviceModel() OVERRIDE;
virtual void ShowAudioInputSettings() OVERRIDE;
// Handlers for requests from render views.
// |delegate| is a weak pointer and should remain valid until
// its |DidCompleteRecognition| method is called or recognition is cancelled.
// |render_process_id| is the ID of the renderer process initiating the
// request.
// |element_rect| is the display bounds of the html element requesting speech
// input (in page coordinates).
virtual void StartRecognition(
InputTagSpeechDispatcherHost* delegate,
int session_id,
int render_process_id,
int render_view_id,
const gfx::Rect& element_rect,
const std::string& language,
const std::string& grammar,
const std::string& origin_url,
net::URLRequestContextGetter* context_getter,
content::SpeechRecognitionPreferences* speech_recognition_prefs);
virtual void CancelRecognition(int session_id);
virtual void CancelAllRequestsWithDelegate(
InputTagSpeechDispatcherHost* delegate);
virtual void StopRecording(int session_id);
// SpeechRecognitionEventListener methods.
virtual void OnRecognitionStart(int session_id) OVERRIDE;
virtual void OnAudioStart(int session_id) OVERRIDE;
virtual void OnEnvironmentEstimationComplete(int session_id) OVERRIDE;
virtual void OnSoundStart(int session_id) OVERRIDE;
virtual void OnSoundEnd(int session_id) OVERRIDE;
virtual void OnAudioEnd(int session_id) OVERRIDE;
virtual void OnRecognitionEnd(int session_id) OVERRIDE;
virtual void OnRecognitionResult(
int session_id, const content::SpeechRecognitionResult& result) OVERRIDE;
virtual void OnRecognitionError(
int session_id, const content::SpeechRecognitionError& error) OVERRIDE;
virtual void OnAudioLevelsChange(
int session_id, float volume, float noise_volume) OVERRIDE;
protected:
// Private constructor to enforce singleton.
friend struct DefaultSingletonTraits<SpeechRecognitionManagerImpl>;
SpeechRecognitionManagerImpl();
virtual ~SpeechRecognitionManagerImpl();
bool HasPendingRequest(int session_id) const;
private:
struct Request {
Request();
~Request();
InputTagSpeechDispatcherHost* delegate;
scoped_refptr<content::SpeechRecognizer> recognizer;
bool is_active; // Set to true when recording or recognition is going on.
};
struct SpeechRecognitionParams;
InputTagSpeechDispatcherHost* GetDelegate(int session_id) const;
void CheckRenderViewTypeAndStartRecognition(
const SpeechRecognitionParams& params);
void ProceedStartingRecognition(const SpeechRecognitionParams& params);
void CancelRecognitionAndInformDelegate(int session_id);
typedef std::map<int, Request> SpeechRecognizerMap;
SpeechRecognizerMap requests_;
std::string request_info_;
bool can_report_metrics_;
int recording_session_id_;
scoped_ptr<content::SpeechRecognitionManagerDelegate> delegate_;
};
} // namespace speech
#endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_MANAGER_IMPL_H_
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