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
|
/*
*
*
* Copyright (C) 2003-2008 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2008 Sebastian Trueg <trueg@k3b.org>
*
* 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.
* See the file "COPYING" for the exact licensing terms.
*/
#include "k3bffmpegdecoder.h"
#include "k3bffmpegwrapper.h"
#include <config-k3b.h>
#include <kdebug.h>
extern "C" {
/*
Recent versions of FFmepg uses C99 constant macros which are not presebt in C++ standard.
The macro __STDC_CONSTANT_MACROS allow C++ to use these macros. Altough it's not defined by C++ standard
it's supported by many implementations.
See bug 236036 and discussion: http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2010-May/088074.html
*/
#define __STDC_CONSTANT_MACROS
#ifdef NEWFFMPEGAVCODECPATH
#include <libavcodec/avcodec.h>
#else
#include <ffmpeg/avcodec.h>
#endif
}
#include <math.h>
K3bFFMpegDecoderFactory::K3bFFMpegDecoderFactory( QObject* parent, const QVariantList& )
: K3b::AudioDecoderFactory( parent )
{
}
K3bFFMpegDecoderFactory::~K3bFFMpegDecoderFactory()
{
}
K3b::AudioDecoder* K3bFFMpegDecoderFactory::createDecoder( QObject* parent ) const
{
return new K3bFFMpegDecoder( parent);
}
bool K3bFFMpegDecoderFactory::canDecode( const KUrl& url )
{
K3bFFMpegFile* file = K3bFFMpegWrapper::instance()->open( url.toLocalFile() );
if( file ) {
delete file;
return true;
}
else {
return false;
}
}
K3bFFMpegDecoder::K3bFFMpegDecoder( QObject* parent )
: K3b::AudioDecoder( parent ),
m_file(0)
{
}
K3bFFMpegDecoder::~K3bFFMpegDecoder()
{
}
QString K3bFFMpegDecoder::fileType() const
{
return m_type;
}
bool K3bFFMpegDecoder::analyseFileInternal( K3b::Msf& frames, int& samplerate, int& ch )
{
m_file = K3bFFMpegWrapper::instance()->open( filename() );
if( m_file ) {
// TODO: call addTechnicalInfo
addMetaInfo( META_TITLE, m_file->title() );
addMetaInfo( META_ARTIST, m_file->author() );
addMetaInfo( META_COMMENT, m_file->comment() );
samplerate = m_file->sampleRate();
ch = m_file->channels();
m_type = m_file->typeComment();
frames = m_file->length();
// ffmpeg's length information is not reliable at all
// so we have to decode the whole file in order to get the correct length
// char buffer[10*2048];
// int len = 0;
// unsigned long long bytes = 0;
// while( ( len = m_file->read( buffer, 10*2048 ) ) > 0 )
// bytes += len;
// frames = (unsigned long)ceil((double)bytes/2048.0);
// cleanup;
delete m_file;
m_file = 0;
return true;
}
else
return false;
}
bool K3bFFMpegDecoder::initDecoderInternal()
{
if( !m_file )
m_file = K3bFFMpegWrapper::instance()->open( filename() );
return (m_file != 0);
}
void K3bFFMpegDecoder::cleanup()
{
delete m_file;
m_file = 0;
}
bool K3bFFMpegDecoder::seekInternal( const K3b::Msf& msf )
{
if( msf == 0 )
return initDecoderInternal();
else
return m_file->seek( msf );
}
int K3bFFMpegDecoder::decodeInternal( char* _data, int maxLen )
{
return m_file->read( _data, maxLen );
}
#include "k3bffmpegdecoder.moc"
|
