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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
|
/*************************************************************************
RecordController.cpp - controller/state matching for the audio recorder
-------------------
begin : Sat Oct 04 2003
copyright : (C) 2003 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "config.h"
#include "libkwave/Utils.h"
#include "RecordController.h"
#include "RecordState.h"
//***************************************************************************
Kwave::RecordController::RecordController()
:QObject(),
m_state(Kwave::REC_UNINITIALIZED),
m_next_state(Kwave::REC_EMPTY),
m_trigger_set(false),
m_enable_prerecording(false),
m_empty(true)
{
}
//***************************************************************************
Kwave::RecordController::~RecordController()
{
}
//***************************************************************************
void Kwave::RecordController::setInitialized(bool initialized)
{
if (initialized) {
m_next_state = (m_empty) ? Kwave::REC_EMPTY : Kwave::REC_DONE;
emit stateChanged(m_state = Kwave::REC_EMPTY);
} else {
m_next_state = Kwave::REC_UNINITIALIZED;
emit stateChanged(Kwave::REC_UNINITIALIZED);
}
}
//***************************************************************************
void Kwave::RecordController::setEmpty(bool empty)
{
m_empty = empty;
}
//***************************************************************************
void Kwave::RecordController::enablePrerecording(bool enable)
{
m_enable_prerecording = enable;
}
//***************************************************************************
void Kwave::RecordController::actionReset()
{
switch (m_state) {
case Kwave::REC_UNINITIALIZED:
// already empty, nothing to do
break;
case Kwave::REC_RECORDING:
#if 0
// fall back to REC_WAITING_FOR_TRIGGER
m_next_state = Kwave::REC_EMPTY;
emit stateChanged(m_state = Kwave::REC_WAITING_FOR_TRIGGER);
break;
#endif
case Kwave::REC_EMPTY:
case Kwave::REC_BUFFERING:
case Kwave::REC_WAITING_FOR_TRIGGER:
case Kwave::REC_PRERECORDING:
case Kwave::REC_PAUSED:
case Kwave::REC_DONE:
{
bool accepted = true;
emit sigReset(accepted);
if (accepted) emit stateChanged(m_state = Kwave::REC_EMPTY);
break;
}
DEFAULT_IMPOSSIBLE;
}
}
//***************************************************************************
void Kwave::RecordController::actionStop()
{
switch (m_state) {
case Kwave::REC_UNINITIALIZED:
case Kwave::REC_EMPTY:
case Kwave::REC_DONE:
// already stopped, nothing to do
break;
case Kwave::REC_BUFFERING:
case Kwave::REC_WAITING_FOR_TRIGGER:
case Kwave::REC_PRERECORDING:
// abort, change to REC_EMPTY
emit sigStopRecord(0);
break;
case Kwave::REC_RECORDING:
case Kwave::REC_PAUSED:
// abort, change to REC_DONE
m_next_state = Kwave::REC_DONE;
emit sigStopRecord(0);
break;
DEFAULT_IMPOSSIBLE;
}
}
//***************************************************************************
void Kwave::RecordController::actionPause()
{
switch (m_state) {
case Kwave::REC_UNINITIALIZED:
case Kwave::REC_EMPTY:
case Kwave::REC_DONE:
// what do you want ?
break;
case Kwave::REC_BUFFERING:
case Kwave::REC_WAITING_FOR_TRIGGER:
case Kwave::REC_PRERECORDING:
// this should never happen
qWarning("RecordController::actionPause(): "
"state = %s ???", stateName(m_state));
break;
case Kwave::REC_RECORDING:
// pause recording
emit stateChanged(m_state = Kwave::REC_PAUSED);
break;
case Kwave::REC_PAUSED:
// continue recording
emit stateChanged(m_state = Kwave::REC_RECORDING);
break;
DEFAULT_IMPOSSIBLE;
}
}
//***************************************************************************
void Kwave::RecordController::actionStart()
{
switch (m_state) {
case Kwave::REC_UNINITIALIZED:
break; // impossible
case Kwave::REC_EMPTY:
case Kwave::REC_DONE:
// interpret this as manual trigger
emit sigStartRecord();
break;
case Kwave::REC_BUFFERING:
case Kwave::REC_PRERECORDING:
case Kwave::REC_WAITING_FOR_TRIGGER:
// interpret as "trigger now"
m_next_state = Kwave::REC_EMPTY;
emit stateChanged(m_state = Kwave::REC_RECORDING);
break;
case Kwave::REC_PAUSED:
// interpret this as "continue"
m_next_state = Kwave::REC_RECORDING;
emit stateChanged(m_state = Kwave::REC_RECORDING);
break;
case Kwave::REC_RECORDING:
// already recording...
m_next_state = Kwave::REC_DONE;
break;
DEFAULT_IMPOSSIBLE;
}
}
//***************************************************************************
void Kwave::RecordController::deviceRecordStarted()
{
switch (m_state) {
case Kwave::REC_UNINITIALIZED:
break; // impossible
case Kwave::REC_EMPTY:
case Kwave::REC_PAUSED:
case Kwave::REC_DONE:
// continue, pre-recording or trigger
m_next_state = (m_empty) ? Kwave::REC_EMPTY : Kwave::REC_DONE;
emit stateChanged(m_state = Kwave::REC_BUFFERING);
break;
case Kwave::REC_BUFFERING:
case Kwave::REC_WAITING_FOR_TRIGGER:
case Kwave::REC_PRERECORDING:
case Kwave::REC_RECORDING:
// this should never happen
qWarning("RecordController::deviceRecordStarted(): "
"state = %s ???", stateName(m_state));
break;
DEFAULT_IMPOSSIBLE;
}
}
//***************************************************************************
void Kwave::RecordController::deviceBufferFull()
{
switch (m_state) {
case Kwave::REC_UNINITIALIZED:
break; // impossible
case Kwave::REC_EMPTY:
// we are only "recording" for updating the level
// meters and other effects -> no state change
break;
case Kwave::REC_WAITING_FOR_TRIGGER:
case Kwave::REC_PRERECORDING:
case Kwave::REC_RECORDING:
// this should never happen
qWarning("RecordController::deviceBufferFull(): "
"state = %s ???", stateName(m_state));
break;
case Kwave::REC_PAUSED: /* == buffering again after pause */
// -> will change to "REC_BUFFERING" soon...
break;
case Kwave::REC_BUFFERING:
if (m_enable_prerecording) {
// prerecording was set
m_state = Kwave::REC_PRERECORDING;
} else if (m_trigger_set) {
// trigger was set
m_state = Kwave::REC_WAITING_FOR_TRIGGER;
} else {
// default: just start recording
m_next_state = Kwave::REC_DONE;
m_state = Kwave::REC_RECORDING;
}
emit stateChanged(m_state);
break;
case Kwave::REC_DONE:
// might occur when the buffer content is flushed
// after a stop
break;
DEFAULT_IMPOSSIBLE;
}
}
//***************************************************************************
void Kwave::RecordController::enableTrigger(bool enable)
{
m_trigger_set = enable;
}
//***************************************************************************
void Kwave::RecordController::deviceTriggerReached()
{
switch (m_state) {
case Kwave::REC_UNINITIALIZED:
case Kwave::REC_EMPTY:
case Kwave::REC_BUFFERING:
case Kwave::REC_RECORDING:
case Kwave::REC_PAUSED:
case Kwave::REC_DONE:
// this should never happen
qWarning("RecordController::deviceTriggerReached(): "
"state = %s ???", stateName(m_state));
break;
case Kwave::REC_PRERECORDING:
case Kwave::REC_WAITING_FOR_TRIGGER:
Q_ASSERT(m_trigger_set);
if ((m_enable_prerecording) &&
(m_state == Kwave::REC_WAITING_FOR_TRIGGER))
{
// prerecording was set
m_state = Kwave::REC_PRERECORDING;
} else {
// default: just start recording
m_state = Kwave::REC_RECORDING;
m_next_state = Kwave::REC_DONE;
}
emit stateChanged(m_state);
break;
DEFAULT_IMPOSSIBLE;
}
}
//***************************************************************************
void Kwave::RecordController::deviceRecordStopped(int)
{
switch (m_state) {
case Kwave::REC_UNINITIALIZED:
case Kwave::REC_EMPTY:
case Kwave::REC_DONE:
// this could happen when an abort occurs during buffering
emit stateChanged(m_state);
break;
case Kwave::REC_BUFFERING:
case Kwave::REC_PRERECORDING:
case Kwave::REC_WAITING_FOR_TRIGGER:
// abort, no real data produced
if (m_empty) {
emit stateChanged(m_state = Kwave::REC_EMPTY);
} else {
emit stateChanged(m_state = Kwave::REC_DONE);
}
break;
case Kwave::REC_RECORDING:
// recording -> pause or done
switch (m_next_state) {
case Kwave::REC_EMPTY:
// something went wrong when starting the recorder
if (m_empty) {
emit stateChanged(m_state = Kwave::REC_EMPTY);
} else {
emit stateChanged(m_state = Kwave::REC_DONE);
}
break;
case Kwave::REC_PAUSED:
emit stateChanged(m_state = Kwave::REC_PAUSED);
break;
case Kwave::REC_DONE:
emit stateChanged(m_state = Kwave::REC_DONE);
break;
default:
qWarning("RecordController::deviceRecordStopped(): "
"next state = %s ???", stateName(m_next_state));
}
break;
case Kwave::REC_PAUSED:
// pause -> done
emit stateChanged(m_state = Kwave::REC_DONE);
break;
DEFAULT_IMPOSSIBLE;
}
}
//***************************************************************************
const char *Kwave::RecordController::stateName(const Kwave::RecordState state)
{
switch (state) {
case Kwave::REC_UNINITIALIZED: return "REC_UNINITIALIZED";
case Kwave::REC_EMPTY: return "REC_EMPTY";
case Kwave::REC_BUFFERING: return "REC_BUFFERING";
case Kwave::REC_WAITING_FOR_TRIGGER: return "REC_WAITING_FOR_TRIGGER";
case Kwave::REC_PRERECORDING: return "REC_PRERECORDING";
case Kwave::REC_RECORDING: return "REC_RECORDING";
case Kwave::REC_PAUSED: return "REC_PAUSED";
case Kwave::REC_DONE: return "REC_DONE";
DEFAULT_IGNORE;
}
return "-INVALID-";
}
//***************************************************************************
//***************************************************************************
#include "moc_RecordController.cpp"
|
