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// Copyright 2014 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_UI_APP_LIST_SPEECH_RECOGNIZER_H_
#define CHROME_BROWSER_UI_APP_LIST_SPEECH_RECOGNIZER_H_
#include <string>
#include "base/memory/weak_ptr.h"
namespace content {
struct SpeechRecognitionSessionPreamble;
}
namespace net {
class URLRequestContextGetter;
}
namespace app_list {
class SpeechRecognizerDelegate;
// SpeechRecognizer is a wrapper around the speech recognition engine that
// simplifies its use from the UI thread. This class handles all setup/shutdown,
// collection of results, error cases, and threading.
class SpeechRecognizer {
public:
SpeechRecognizer(const base::WeakPtr<SpeechRecognizerDelegate>& delegate,
net::URLRequestContextGetter* url_request_context_getter,
const std::string& locale);
~SpeechRecognizer();
// Start/stop the speech recognizer. |preamble| contains the preamble audio to
// log if auth parameters are available.
// Must be called on the UI thread.
void Start(
const scoped_refptr<content::SpeechRecognitionSessionPreamble>& preamble);
void Stop();
private:
class EventListener;
base::WeakPtr<SpeechRecognizerDelegate> delegate_;
scoped_refptr<EventListener> speech_event_listener_;
DISALLOW_COPY_AND_ASSIGN(SpeechRecognizer);
};
} // namespace app_list
#endif // CHROME_BROWSER_UI_APP_LIST_SPEECH_RECOGNIZER_H_
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