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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_INPUT_MANAGER_H_
#define CONTENT_BROWSER_SPEECH_SPEECH_INPUT_MANAGER_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/singleton.h"
#include "content/public/browser/speech_input_manager.h"
#include "content/public/browser/speech_recognizer_delegate.h"
#include "ui/gfx/rect.h"
class AudioManager;
namespace content {
class ResourceContext;
class SpeechInputManagerDelegate;
class SpeechInputPreferences;
struct SpeechInputResult;
}
namespace net {
class URLRequestContextGetter;
}
namespace speech_input {
class SpeechInputDispatcherHost;
class SpeechRecognizerImpl;
class CONTENT_EXPORT SpeechInputManagerImpl
: NON_EXPORTED_BASE(public content::SpeechInputManager),
NON_EXPORTED_BASE(public content::SpeechRecognizerDelegate) {
public:
static SpeechInputManagerImpl* GetInstance();
// SpeechInputManager implementation:
virtual void StartRecognitionForRequest(int caller_id) OVERRIDE;
virtual void CancelRecognitionForRequest(int caller_id) OVERRIDE;
virtual void FocusLostForRequest(int caller_id) OVERRIDE;
virtual bool HasAudioInputDevices() OVERRIDE;
virtual bool IsRecordingInProcess() 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(
SpeechInputDispatcherHost* delegate,
int caller_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::SpeechInputPreferences* speech_input_prefs);
virtual void CancelRecognition(int caller_id);
virtual void CancelAllRequestsWithDelegate(
SpeechInputDispatcherHost* delegate);
virtual void StopRecording(int caller_id);
// Overridden from content::SpeechRecognizerDelegate:
virtual void DidStartReceivingAudio(int caller_id) OVERRIDE;
virtual void SetRecognitionResult(
int caller_id,
const content::SpeechInputResult& result) OVERRIDE;
virtual void DidCompleteRecording(int caller_id) OVERRIDE;
virtual void DidCompleteRecognition(int caller_id) OVERRIDE;
virtual void DidStartReceivingSpeech(int caller_id) OVERRIDE;
virtual void DidStopReceivingSpeech(int caller_id) OVERRIDE;
virtual void OnRecognizerError(int caller_id,
content::SpeechInputError error) OVERRIDE;
virtual void DidCompleteEnvironmentEstimation(int caller_id) OVERRIDE;
virtual void SetInputVolume(int caller_id, float volume,
float noise_volume) OVERRIDE;
protected:
// Private constructor to enforce singleton.
friend struct DefaultSingletonTraits<SpeechInputManagerImpl>;
SpeechInputManagerImpl();
virtual ~SpeechInputManagerImpl();
bool HasPendingRequest(int caller_id) const;
private:
struct SpeechInputRequest {
SpeechInputRequest();
~SpeechInputRequest();
SpeechInputDispatcherHost* delegate;
scoped_refptr<SpeechRecognizerImpl> recognizer;
bool is_active; // Set to true when recording or recognition is going on.
};
struct SpeechInputParams;
SpeechInputDispatcherHost* GetDelegate(int caller_id) const;
void CheckRenderViewTypeAndStartRecognition(const SpeechInputParams& params);
void ProceedStartingRecognition(const SpeechInputParams& params);
void CancelRecognitionAndInformDelegate(int caller_id);
typedef std::map<int, SpeechInputRequest> SpeechRecognizerMap;
SpeechRecognizerMap requests_;
std::string request_info_;
bool can_report_metrics_;
int recording_caller_id_;
content::SpeechInputManagerDelegate* delegate_;
};
} // namespace speech_input
#endif // CONTENT_BROWSER_SPEECH_SPEECH_INPUT_MANAGER_H_
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