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
|
/***************************************************************************
MultiTrackWriter.cpp - writer for multi-track signals
-------------------
begin : Sat Jun 30 2001
copyright : (C) 2001 by Thomas Eschenbacher
email : Thomas Eschenbacher <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 <new>
#include "libkwave/MultiTrackWriter.h"
#include "libkwave/SignalManager.h"
#include "libkwave/Utils.h"
#include "libkwave/undo/UndoInsertAction.h"
#include "libkwave/undo/UndoModifyAction.h"
#include "libkwave/undo/UndoTransactionGuard.h"
//***************************************************************************
Kwave::MultiTrackWriter::MultiTrackWriter()
:Kwave::MultiWriter()
{
}
//***************************************************************************
Kwave::MultiTrackWriter::MultiTrackWriter(
Kwave::SignalManager &signal_manager,
const QVector<unsigned int> &track_list,
Kwave::InsertMode mode,
sample_index_t left,
sample_index_t right)
:Kwave::MultiWriter()
{
if (!init(signal_manager, track_list, mode, left, right)) {
// out of memory or aborted
qWarning("MultiTrackWriter::init FAILED");
}
}
//***************************************************************************
Kwave::MultiTrackWriter::MultiTrackWriter(Kwave::SignalManager &signal_manager,
Kwave::InsertMode mode)
:Kwave::MultiWriter()
{
QVector<unsigned int> track_list = signal_manager.selectedTracks();
sample_index_t left = 0;
sample_index_t right = 0;
if (signal_manager.length()) {
// default if signal is present: current selection
left = signal_manager.selection().first();
right = signal_manager.selection().last();
if (left == right) {
// if no selection: whole signal
left = 0;
right = signal_manager.length() - 1;
}
}
if (!init(signal_manager, track_list, mode, left, right)) {
// out of memory or aborted
qWarning("MultiTrackWriter::init FAILED");
}
}
//***************************************************************************
Kwave::MultiTrackWriter::~MultiTrackWriter()
{
flush();
clear();
}
//***************************************************************************
bool Kwave::MultiTrackWriter::init(Kwave::SignalManager &signal_manager,
const QVector<unsigned int> &track_list,
Kwave::InsertMode mode,
sample_index_t left,
sample_index_t right)
{
Kwave::UndoTransactionGuard guard(signal_manager, QString());
unsigned int index = 0;
foreach (unsigned int track, track_list) {
// NOTE: this function is *nearly* identical to the one in the
// Signal class, except for undo support
Kwave::Writer *writer = signal_manager.openWriter(
mode, track, left, right);
if (writer) {
insert(index++, writer);
// get the real/effective left and right sample
left = writer->first();
right = writer->last();
} else {
// out of memory or aborted
clear();
return false;
}
}
// skip all that undo handling below if undo is not enabled
// or the writer creation has failed
if (!signal_manager.undoEnabled()) return true;
// enter a new undo transaction and let it close when the writer closes
signal_manager.startUndoTransaction();
QObject::connect(this, SIGNAL(destroyed()),
&signal_manager, SLOT(closeUndoTransaction()),
Qt::QueuedConnection);
// create an undo action for the modification of the samples
UndoAction *undo = nullptr;
switch (mode) {
case Kwave::Append:
case Kwave::Insert: {
undo = new(std::nothrow) Kwave::UndoInsertAction(
signal_manager.parentWidget(),
track_list,
left,
right - left + 1
);
if (undo) {
Kwave::Writer *last_writer = at(tracks() - 1);
QObject::connect(
last_writer,
SIGNAL(sigSamplesWritten(sample_index_t)),
static_cast<Kwave::UndoInsertAction *>(undo),
SLOT(setLength(sample_index_t)));
}
break;
}
case Kwave::Overwrite: {
foreach (unsigned int track, track_list) {
undo = new(std::nothrow) Kwave::UndoModifyAction(
track, left, right - left + 1);
if (!signal_manager.registerUndoAction(undo)) {
// aborted, do not continue without undo
clear();
return false;
}
}
break;
}
DEFAULT_IMPOSSIBLE;
}
if ( (mode != Kwave::Overwrite) &&
!signal_manager.registerUndoAction(undo) )
{
// aborted, do not continue without undo
clear();
return false;
}
// Everything was ok, the action now is owned by the current undo
// transaction. The transaction is owned by the SignalManager and
// will be closed when the writer gets closed.
return true;
}
//***************************************************************************
//***************************************************************************
#include "moc_MultiTrackWriter.cpp"
|
