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
|
/*
*
* $Id: k3bffmpegdecoder.cpp 371113 2004-12-16 17:02:49Z trueg $
* Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2004 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 <kdebug.h>
#include <k3bpluginfactory.h>
#include <ffmpeg/avcodec.h>
#include <math.h>
K_EXPORT_COMPONENT_FACTORY( libk3bffmpegdecoder, K3bPluginFactory<K3bFFMpegDecoderFactory>( "k3bffmpegdecoder" ) )
K3bFFMpegDecoderFactory::K3bFFMpegDecoderFactory( QObject* parent, const char* name )
: K3bAudioDecoderFactory( parent, name )
{
}
K3bFFMpegDecoderFactory::~K3bFFMpegDecoderFactory()
{
}
K3bAudioDecoder* K3bFFMpegDecoderFactory::createDecoder( QObject* parent,
const char* name ) const
{
return new K3bFFMpegDecoder( parent, name );
}
bool K3bFFMpegDecoderFactory::canDecode( const KURL& url )
{
K3bFFMpegFile* file = K3bFFMpegWrapper::instance()->open( url.path() );
if( file ) {
delete file;
return true;
}
else {
return false;
}
}
K3bFFMpegDecoder::K3bFFMpegDecoder( QObject* parent, const char* name )
: K3bAudioDecoder( parent, name ),
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();
// ffmpeg cannot handle vbr mp3 files properly (their length)
// so we have to decode the whole file in order to get the correct length
if( m_file->type() == CODEC_ID_MP3LAME ) {
kdDebug() << "(K3bFFMpegDecoder) mp3. Have to decode the hole file to get it's length." << endl;
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);
}
else
frames = m_file->length();
// 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"
|
