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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_DISPATCHER_HOST_H_
#define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_DISPATCHER_HOST_H_
#include "base/memory/scoped_ptr.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_message_filter.h"
#include "content/public/browser/speech_recognition_event_listener.h"
#include "net/url_request/url_request_context_getter.h"
struct SpeechRecognitionHostMsg_StartRequest_Params;
namespace content {
class SpeechRecognitionManager;
class SpeechRecognitionPreferences;
struct SpeechRecognitionResult;
}
namespace speech {
// SpeechRecognitionDispatcherHost is a delegate for Speech API messages used by
// RenderMessageFilter. Basically it acts as a proxy, relaying the events coming
// from the SpeechRecognitionManager to IPC messages (and vice versa).
// It's the complement of SpeechRecognitionDispatcher (owned by RenderView).
class CONTENT_EXPORT SpeechRecognitionDispatcherHost
: public content::BrowserMessageFilter,
public content::SpeechRecognitionEventListener {
public:
SpeechRecognitionDispatcherHost(
int render_process_id,
net::URLRequestContextGetter* context_getter,
content::SpeechRecognitionPreferences* recognition_preferences);
// 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;
// content::BrowserMessageFilter implementation.
virtual bool OnMessageReceived(const IPC::Message& message,
bool* message_was_ok) OVERRIDE;
// Singleton manager setter useful for tests.
static void SetManagerForTests(content::SpeechRecognitionManager* manager);
private:
virtual ~SpeechRecognitionDispatcherHost();
void OnStartRequest(
const SpeechRecognitionHostMsg_StartRequest_Params& params);
void OnAbortRequest(int render_view_id, int request_id);
void OnStopCaptureRequest(int render_view_id, int request_id);
// Returns the speech recognition manager to forward requests to.
content::SpeechRecognitionManager* manager();
int render_process_id_;
scoped_refptr<net::URLRequestContextGetter> context_getter_;
scoped_refptr<content::SpeechRecognitionPreferences> recognition_preferences_;
static content::SpeechRecognitionManager* manager_for_tests_;
DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionDispatcherHost);
};
} // namespace speech
#endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_DISPATCHER_HOST_H_
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