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// Copyright (c) 2010 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 CHROME_BROWSER_SPEECH_SPEECH_INPUT_MANAGER_H_
#define CHROME_BROWSER_SPEECH_SPEECH_INPUT_MANAGER_H_
#include "base/basictypes.h"
#include "chrome/browser/speech/speech_recognizer.h"
#include "ipc/ipc_message.h"
namespace speech_input {
// This is the gatekeeper for speech recognition in the browser process. It
// handles requests received from various render views and makes sure only one
// of them can use speech recognition at a time. It also sends recognition
// results and status events to the render views when required.
class SpeechInputManager {
public:
// Implemented by the dispatcher host to relay events to the render views.
class Delegate {
public:
virtual void SetRecognitionResult(const SpeechInputCallerId& caller_id,
const string16& value) = 0;
virtual void DidCompleteRecording(const SpeechInputCallerId& caller_id) = 0;
virtual void DidCompleteRecognition(
const SpeechInputCallerId& caller_id) = 0;
};
// Factory method to create new instances.
static SpeechInputManager* Create(Delegate* delegate);
// Factory method definition useful for tests.
typedef SpeechInputManager* (FactoryMethod)(Delegate*);
virtual ~SpeechInputManager() {}
// Handlers for requests from render views.
virtual void StartRecognition(const SpeechInputCallerId& caller_id) = 0;
virtual void CancelRecognition(const SpeechInputCallerId& caller_id) = 0;
virtual void StopRecording(const SpeechInputCallerId& caller_id) = 0;
};
// This typedef is to workaround the issue with certain versions of
// Visual Studio where it gets confused between multiple Delegate
// classes and gives a C2500 error. (I saw this error on the try bots -
// the workaround was not needed for my machine).
typedef SpeechInputManager::Delegate SpeechInputManagerDelegate;
} // namespace speech_input
#endif // CHROME_BROWSER_SPEECH_SPEECH_INPUT_MANAGER_H_
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