1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
// 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 "base/memory/weak_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;
struct SpeechRecognitionResult;
// 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 BrowserMessageFilter,
public SpeechRecognitionEventListener {
public:
SpeechRecognitionDispatcherHost(
int render_process_id,
net::URLRequestContextGetter* context_getter);
base::WeakPtr<SpeechRecognitionDispatcherHost> AsWeakPtr();
// SpeechRecognitionEventListener methods.
void OnRecognitionStart(int session_id) override;
void OnAudioStart(int session_id) override;
void OnEnvironmentEstimationComplete(int session_id) override;
void OnSoundStart(int session_id) override;
void OnSoundEnd(int session_id) override;
void OnAudioEnd(int session_id) override;
void OnRecognitionEnd(int session_id) override;
void OnRecognitionResults(int session_id,
const SpeechRecognitionResults& results) override;
void OnRecognitionError(int session_id,
const SpeechRecognitionError& error) override;
void OnAudioLevelsChange(int session_id,
float volume,
float noise_volume) override;
// BrowserMessageFilter implementation.
bool OnMessageReceived(const IPC::Message& message) override;
void OverrideThreadForMessage(const IPC::Message& message,
BrowserThread::ID* thread) override;
void OnChannelClosing() override;
private:
~SpeechRecognitionDispatcherHost() override;
void OnStartRequest(
const SpeechRecognitionHostMsg_StartRequest_Params& params);
void OnStartRequestOnIO(
int embedder_render_process_id,
int embedder_render_view_id,
const SpeechRecognitionHostMsg_StartRequest_Params& params,
int params_render_frame_id,
bool filter_profanities);
void OnAbortRequest(int render_view_id, int request_id);
void OnStopCaptureRequest(int render_view_id, int request_id);
void OnAbortAllRequests(int render_view_id);
int render_process_id_;
scoped_refptr<net::URLRequestContextGetter> context_getter_;
// Used for posting asynchronous tasks (on the IO thread) without worrying
// about this class being destroyed in the meanwhile (due to browser shutdown)
// since tasks pending on a destroyed WeakPtr are automatically discarded.
base::WeakPtrFactory<SpeechRecognitionDispatcherHost> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionDispatcherHost);
};
} // namespace content
#endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_DISPATCHER_HOST_H_
|
