1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_DISPATCHER_HOST_H_
6 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_DISPATCHER_HOST_H_
8 #include "base/memory/scoped_ptr.h"
9 #include "content/common/content_export.h"
10 #include "content/public/browser/browser_message_filter.h"
11 #include "content/public/browser/speech_recognition_event_listener.h"
12 #include "net/url_request/url_request_context_getter.h"
14 struct SpeechRecognitionHostMsg_StartRequest_Params;
18 class SpeechRecognitionManager;
19 struct SpeechRecognitionResult;
21 // SpeechRecognitionDispatcherHost is a delegate for Speech API messages used by
22 // RenderMessageFilter. Basically it acts as a proxy, relaying the events coming
23 // from the SpeechRecognitionManager to IPC messages (and vice versa).
24 // It's the complement of SpeechRecognitionDispatcher (owned by RenderView).
25 class CONTENT_EXPORT SpeechRecognitionDispatcherHost
26 : public BrowserMessageFilter,
27 public SpeechRecognitionEventListener {
29 SpeechRecognitionDispatcherHost(
31 int render_process_id,
32 net::URLRequestContextGetter* context_getter);
34 // SpeechRecognitionEventListener methods.
35 virtual void OnRecognitionStart(int session_id) OVERRIDE;
36 virtual void OnAudioStart(int session_id) OVERRIDE;
37 virtual void OnEnvironmentEstimationComplete(int session_id) OVERRIDE;
38 virtual void OnSoundStart(int session_id) OVERRIDE;
39 virtual void OnSoundEnd(int session_id) OVERRIDE;
40 virtual void OnAudioEnd(int session_id) OVERRIDE;
41 virtual void OnRecognitionEnd(int session_id) OVERRIDE;
42 virtual void OnRecognitionResults(
44 const SpeechRecognitionResults& results) OVERRIDE;
45 virtual void OnRecognitionError(
47 const SpeechRecognitionError& error) OVERRIDE;
48 virtual void OnAudioLevelsChange(int session_id,
50 float noise_volume) OVERRIDE;
52 // BrowserMessageFilter implementation.
53 virtual bool OnMessageReceived(const IPC::Message& message,
54 bool* message_was_ok) OVERRIDE;
55 virtual void OverrideThreadForMessage(
56 const IPC::Message& message,
57 BrowserThread::ID* thread) OVERRIDE;
60 virtual ~SpeechRecognitionDispatcherHost();
63 const SpeechRecognitionHostMsg_StartRequest_Params& params);
64 void OnStartRequestOnIO(
65 int embedder_render_process_id,
66 int embedder_render_view_id,
67 const SpeechRecognitionHostMsg_StartRequest_Params& params,
68 bool filter_profanities);
69 void OnAbortRequest(int render_view_id, int request_id);
70 void OnStopCaptureRequest(int render_view_id, int request_id);
73 int render_process_id_;
74 scoped_refptr<net::URLRequestContextGetter> context_getter_;
76 DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionDispatcherHost);
79 } // namespace content
81 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_DISPATCHER_HOST_H_