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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
// 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.
#include <math.h>
#include "base/memory/singleton.h"
#include "chrome/browser/speech/tts_platform.h"
#include "content/public/browser/browser_thread.h"
#include "library_loaders/libspeechd.h"
using content::BrowserThread;
namespace {
const char kNotSupportedError[] =
"Native speech synthesis not supported on this platform.";
} // namespace
class TtsPlatformImplLinux : public TtsPlatformImpl {
public:
virtual bool PlatformImplAvailable() OVERRIDE;
virtual bool Speak(
int utterance_id,
const std::string& utterance,
const std::string& lang,
const UtteranceContinuousParameters& params) OVERRIDE;
virtual bool StopSpeaking() OVERRIDE;
virtual bool IsSpeaking() OVERRIDE;
virtual bool SendsEvent(TtsEventType event_type) OVERRIDE;
void OnSpeechEvent(SPDNotificationType type);
// Get the single instance of this class.
static TtsPlatformImplLinux* GetInstance();
private:
TtsPlatformImplLinux();
virtual ~TtsPlatformImplLinux();
// Resets the connection with speech dispatcher.
void Reset();
static void NotificationCallback(size_t msg_id,
size_t client_id,
SPDNotificationType type);
static void IndexMarkCallback(size_t msg_id,
size_t client_id,
SPDNotificationType state,
char* index_mark);
static SPDNotificationType current_notification_;
LibSpeechdLoader libspeechd_loader_;
SPDConnection* conn_;
// These apply to the current utterance only.
std::string utterance_;
int utterance_id_;
friend struct DefaultSingletonTraits<TtsPlatformImplLinux>;
DISALLOW_COPY_AND_ASSIGN(TtsPlatformImplLinux);
};
// static
SPDNotificationType TtsPlatformImplLinux::current_notification_ =
SPD_EVENT_END;
TtsPlatformImplLinux::TtsPlatformImplLinux()
: utterance_id_(0) {
if (!libspeechd_loader_.Load("libspeechd.so.2"))
return;
conn_ = libspeechd_loader_.spd_open(
"chrome", "extension_api", NULL, SPD_MODE_THREADED);
if (!conn_)
return;
// Register callbacks for all events.
conn_->callback_begin =
conn_->callback_end =
conn_->callback_cancel =
conn_->callback_pause =
conn_->callback_resume =
&NotificationCallback;
conn_->callback_im = &IndexMarkCallback;
libspeechd_loader_.spd_set_notification_on(conn_, SPD_BEGIN);
libspeechd_loader_.spd_set_notification_on(conn_, SPD_END);
libspeechd_loader_.spd_set_notification_on(conn_, SPD_CANCEL);
libspeechd_loader_.spd_set_notification_on(conn_, SPD_PAUSE);
libspeechd_loader_.spd_set_notification_on(conn_, SPD_RESUME);
}
TtsPlatformImplLinux::~TtsPlatformImplLinux() {
if (conn_) {
libspeechd_loader_.spd_close(conn_);
conn_ = NULL;
}
}
void TtsPlatformImplLinux::Reset() {
if (conn_)
libspeechd_loader_.spd_close(conn_);
conn_ = libspeechd_loader_.spd_open(
"chrome", "extension_api", NULL, SPD_MODE_THREADED);
}
bool TtsPlatformImplLinux::PlatformImplAvailable() {
return libspeechd_loader_.loaded() && (conn_ != NULL);
}
bool TtsPlatformImplLinux::Speak(
int utterance_id,
const std::string& utterance,
const std::string& lang,
const UtteranceContinuousParameters& params) {
if (!PlatformImplAvailable()) {
error_ = kNotSupportedError;
return false;
}
// Speech dispatcher's speech params are around 3x at either limit.
float rate = params.rate > 3 ? 3 : params.rate;
rate = params.rate < 0.334 ? 0.334 : rate;
float pitch = params.pitch > 3 ? 3 : params.pitch;
pitch = params.pitch < 0.334 ? 0.334 : pitch;
// Map our multiplicative range to Speech Dispatcher's linear range.
// .334 = -100.
// 3 = 100.
libspeechd_loader_.spd_set_voice_rate(conn_, 100 * log10(rate) / log10(3));
libspeechd_loader_.spd_set_voice_pitch(conn_, 100 * log10(pitch) / log10(3));
utterance_ = utterance;
utterance_id_ = utterance_id;
if (libspeechd_loader_.spd_say(conn_, SPD_TEXT, utterance.c_str()) == -1) {
Reset();
return false;
}
return true;
}
bool TtsPlatformImplLinux::StopSpeaking() {
if (!PlatformImplAvailable())
return false;
if (libspeechd_loader_.spd_stop(conn_) == -1) {
Reset();
return false;
}
return true;
}
bool TtsPlatformImplLinux::IsSpeaking() {
return current_notification_ == SPD_EVENT_BEGIN;
}
bool TtsPlatformImplLinux::SendsEvent(TtsEventType event_type) {
return (event_type == TTS_EVENT_START ||
event_type == TTS_EVENT_END ||
event_type == TTS_EVENT_CANCELLED ||
event_type == TTS_EVENT_MARKER);
}
void TtsPlatformImplLinux::OnSpeechEvent(SPDNotificationType type) {
TtsController* controller = TtsController::GetInstance();
switch (type) {
case SPD_EVENT_BEGIN:
case SPD_EVENT_RESUME:
controller->OnTtsEvent(utterance_id_, TTS_EVENT_START, 0, std::string());
break;
case SPD_EVENT_END:
case SPD_EVENT_PAUSE:
controller->OnTtsEvent(
utterance_id_, TTS_EVENT_END, utterance_.size(), std::string());
break;
case SPD_EVENT_CANCEL:
controller->OnTtsEvent(
utterance_id_, TTS_EVENT_CANCELLED, 0, std::string());
break;
case SPD_EVENT_INDEX_MARK:
controller->OnTtsEvent(utterance_id_, TTS_EVENT_MARKER, 0, std::string());
break;
}
}
// static
void TtsPlatformImplLinux::NotificationCallback(
size_t msg_id, size_t client_id, SPDNotificationType type) {
// We run Speech Dispatcher in threaded mode, so these callbacks should always
// be in a separate thread.
if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
current_notification_ = type;
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&TtsPlatformImplLinux::OnSpeechEvent,
base::Unretained(TtsPlatformImplLinux::GetInstance()),
type));
}
}
// static
void TtsPlatformImplLinux::IndexMarkCallback(size_t msg_id,
size_t client_id,
SPDNotificationType state,
char* index_mark) {
// TODO(dtseng): index_mark appears to specify an index type supplied by a
// client. Need to explore how this is used before hooking it up with existing
// word, sentence events.
// We run Speech Dispatcher in threaded mode, so these callbacks should always
// be in a separate thread.
if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
current_notification_ = state;
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&TtsPlatformImplLinux::OnSpeechEvent,
base::Unretained(TtsPlatformImplLinux::GetInstance()),
state));
}
}
// static
TtsPlatformImplLinux* TtsPlatformImplLinux::GetInstance() {
return Singleton<TtsPlatformImplLinux,
LeakySingletonTraits<TtsPlatformImplLinux> >::get();
}
// static
TtsPlatformImpl* TtsPlatformImpl::GetInstance() {
return TtsPlatformImplLinux::GetInstance();
}
|
