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
|
/******************************************************************************
* This file is part of the QtOpenAL project
* Copyright (c) 2011 Laszlo Papp <lpapp@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "qalvorbisfileaudiodecoder.h"
#include <QtCore/QFile>
#include <QtCore/QString>
#include <QtCore/QUrl>
#include <QtCore/QDebug>
#include <vorbis/vorbisfile.h>
class QALVorbisFileAudioDecoder::Private
{
public:
Private()
{
}
~Private()
{
}
// static sf_count_t fileLengthCallback(void *user_data);
static int seekCallback(void *datasource, ogg_int64_t offset, int whence);
static size_t readCallback(void *ptr, size_t size, size_t nmemb, void *datasource);
static long tellCallback(void *datasource);
static int closeCallback(void *datasource);
QFile file;
QByteArray encodedData;
OggVorbis_File *oggVorbisFile;
vorbis_info vorbisInfo;
};
int
QALVorbisFileAudioDecoder::Private::closeCallback(void *datasource)
{
reinterpret_cast<QALVorbisFileAudioDecoder::Private*>(datasource)->file.close();
return 0;
}
int
QALVorbisFileAudioDecoder::Private::seekCallback(void *datasource, ogg_int64_t offset, int whence)
{
QFile &tmpFile = reinterpret_cast<QALVorbisFileAudioDecoder::Private*>(datasource)->file;
switch (whence) {
case SEEK_SET:
if (tmpFile.seek(offset) == true)
return offset;
break;
case SEEK_CUR:
offset += tmpFile.pos();
if (tmpFile.seek(offset) == true)
return offset;
break;
case SEEK_END:
offset += tmpFile.size();
if (tmpFile.seek(offset) == true)
return offset;
break;
default:
qWarning() << Q_FUNC_INFO << "Failed to seek the file:" << tmpFile.fileName() << "Invalid whence value:" << whence;
break;
}
qWarning() << Q_FUNC_INFO << "Failed to seek the file:" << tmpFile.fileName();
return -1;
}
size_t
QALVorbisFileAudioDecoder::Private::readCallback(void *ptr, size_t size, size_t nmemb, void *datasource)
{
return reinterpret_cast<QALVorbisFileAudioDecoder::Private*>(datasource)->file.read(reinterpret_cast<char*>(ptr), size * nmemb);
}
long
QALVorbisFileAudioDecoder::Private::tellCallback(void *datasource)
{
return reinterpret_cast<QALVorbisFileAudioDecoder::Private*>(datasource)->file.pos();
}
QALVorbisFileAudioDecoder::QALVorbisFileAudioDecoder()
: d(new Private)
{
}
QALVorbisFileAudioDecoder::~QALVorbisFileAudioDecoder()
{
}
bool
QALVorbisFileAudioDecoder::open(const QFile &file)
{
return open(file.fileName());
}
bool
QALVorbisFileAudioDecoder::open(const QUrl &fileUrl)
{
return open(fileUrl.toLocalFile());
}
bool
QALVorbisFileAudioDecoder::open(const QString &fileName)
{
d->file.setFileName(fileName);
ov_callbacks oggVorbisCallbacks;
oggVorbisCallbacks.close_func = &d->closeCallback;
oggVorbisCallbacks.read_func = &d->readCallback;
oggVorbisCallbacks.seek_func = &d->seekCallback;
oggVorbisCallbacks.tell_func = &d->tellCallback;
int error;
if ((error = ov_open_callbacks(d, d->oggVorbisFile, 0, 0, oggVorbisCallbacks) < 0)) {
qWarning() << Q_FUNC_INFO << "Failed to open the file" << fileName.toUtf8().constData() << "for decoding:" << error;
return false;
}
d->vorbisInfo = *ov_info(d->oggVorbisFile, -1);
return true;
}
qint64
QALVorbisFileAudioDecoder::pos()
{
int retval;
if ((retval = ov_pcm_tell(d->oggVorbisFile)) == OV_EINVAL) {
qWarning() << Q_FUNC_INFO << "Failed to tell the current position because the argument was invalid. The requested bitstream did not exist.";
}
return retval;
}
bool
QALVorbisFileAudioDecoder::seek(qint64 pos)
{
int retval;
if ((retval = ov_pcm_seek(d->oggVorbisFile, pos) < 0)) {
qWarning() << Q_FUNC_INFO << "Failed to seek in the file:" << retval;
return false;
}
return true;
}
bool
QALVorbisFileAudioDecoder::close()
{
int error;
if ((error = ov_clear(d->oggVorbisFile))) {
qWarning() << Q_FUNC_INFO << "Failed to close the file:" << error;
return false;
}
return true;
}
void
QALVorbisFileAudioDecoder::setEncodedData(const QByteArray &encodedData)
{
d->encodedData = encodedData;
}
int
QALVorbisFileAudioDecoder::channels() const
{
return d->vorbisInfo.channels;
}
int
QALVorbisFileAudioDecoder::sampleRate() const
{
return d->vorbisInfo.rate;
}
int
QALVorbisFileAudioDecoder::sampleSize() const
{
return 16;
}
QByteArray
QALVorbisFileAudioDecoder::decode(qint64 maxlen)
{
QByteArray result;
result.reserve(maxlen);
char *decodedData = result.data();
if (maxlen != decode(decodedData, maxlen))
qWarning() << Q_FUNC_INFO << "Could not to decode all the data:" << maxlen;
return result;
}
qint64
QALVorbisFileAudioDecoder::decode(char *decodedData, qint64 maxlen)
{
int bitStream;
#if Q_BYTE_ORDER == Q_BIG_ENDIAN
return ov_read(d->oggVorbisFile, decodedData, maxlen, 1, 2, 1, &bitStream);
#elif Q_BYTE_ORDER == Q_LITTLE_ENDIAN
return ov_read(d->oggVorbisFile, decodedData, maxlen, 0, 2, 1, &bitStream);
#endif
}
|
