1 /***************************************************************************
2     copyright            : (C) 2012 by Lukáš Lalinský
3     email                : lalinsky@gmail.com
4 
5     copyright            : (C) 2002 - 2008 by Scott Wheeler
6     email                : wheeler@kde.org
7                            (original Vorbis implementation)
8  ***************************************************************************/
9 
10 /***************************************************************************
11  *   This library is free software; you can redistribute it and/or modify  *
12  *   it under the terms of the GNU Lesser General Public License version   *
13  *   2.1 as published by the Free Software Foundation.                     *
14  *                                                                         *
15  *   This library is distributed in the hope that it will be useful, but   *
16  *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
18  *   Lesser General Public License for more details.                       *
19  *                                                                         *
20  *   You should have received a copy of the GNU Lesser General Public      *
21  *   License along with this library; if not, write to the Free Software   *
22  *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA         *
23  *   02110-1301  USA                                                       *
24  *                                                                         *
25  *   Alternatively, this file is available under the Mozilla Public        *
26  *   License Version 1.1.  You may obtain a copy of the License at         *
27  *   http://www.mozilla.org/MPL/                                           *
28  ***************************************************************************/
29 
30 #include <tstring.h>
31 #include <tdebug.h>
32 #include <tpropertymap.h>
33 #include <tagutils.h>
34 
35 #include "opusfile.h"
36 
37 using namespace TagLib;
38 using namespace TagLib::Ogg;
39 
40 class Opus::File::FilePrivate
41 {
42 public:
FilePrivate()43   FilePrivate() :
44     comment(0),
45     properties(0) {}
46 
~FilePrivate()47   ~FilePrivate()
48   {
49     delete comment;
50     delete properties;
51   }
52 
53   Ogg::XiphComment *comment;
54   Properties *properties;
55 };
56 
57 ////////////////////////////////////////////////////////////////////////////////
58 // static members
59 ////////////////////////////////////////////////////////////////////////////////
60 
isSupported(IOStream * stream)61 bool Ogg::Opus::File::isSupported(IOStream *stream)
62 {
63   // An Opus file has IDs "OggS" and "OpusHead" somewhere.
64 
65   const ByteVector buffer = Utils::readHeader(stream, bufferSize(), false);
66   return (buffer.find("OggS") >= 0 && buffer.find("OpusHead") >= 0);
67 }
68 
69 ////////////////////////////////////////////////////////////////////////////////
70 // public members
71 ////////////////////////////////////////////////////////////////////////////////
72 
File(FileName file,bool readProperties,Properties::ReadStyle)73 Opus::File::File(FileName file, bool readProperties, Properties::ReadStyle) :
74   Ogg::File(file),
75   d(new FilePrivate())
76 {
77   if(isOpen())
78     read(readProperties);
79 }
80 
File(IOStream * stream,bool readProperties,Properties::ReadStyle)81 Opus::File::File(IOStream *stream, bool readProperties, Properties::ReadStyle) :
82   Ogg::File(stream),
83   d(new FilePrivate())
84 {
85   if(isOpen())
86     read(readProperties);
87 }
88 
~File()89 Opus::File::~File()
90 {
91   delete d;
92 }
93 
tag() const94 Ogg::XiphComment *Opus::File::tag() const
95 {
96   return d->comment;
97 }
98 
properties() const99 PropertyMap Opus::File::properties() const
100 {
101   return d->comment->properties();
102 }
103 
setProperties(const PropertyMap & properties)104 PropertyMap Opus::File::setProperties(const PropertyMap &properties)
105 {
106   return d->comment->setProperties(properties);
107 }
108 
audioProperties() const109 Opus::Properties *Opus::File::audioProperties() const
110 {
111   return d->properties;
112 }
113 
save()114 bool Opus::File::save()
115 {
116   if(!d->comment)
117     d->comment = new Ogg::XiphComment();
118 
119   setPacket(1, ByteVector("OpusTags", 8) + d->comment->render(false));
120 
121   return Ogg::File::save();
122 }
123 
124 ////////////////////////////////////////////////////////////////////////////////
125 // private members
126 ////////////////////////////////////////////////////////////////////////////////
127 
read(bool readProperties)128 void Opus::File::read(bool readProperties)
129 {
130   ByteVector opusHeaderData = packet(0);
131 
132   if(!opusHeaderData.startsWith("OpusHead")) {
133     setValid(false);
134     debug("Opus::File::read() -- invalid Opus identification header");
135     return;
136   }
137 
138   ByteVector commentHeaderData = packet(1);
139 
140   if(!commentHeaderData.startsWith("OpusTags")) {
141     setValid(false);
142     debug("Opus::File::read() -- invalid Opus tags header");
143     return;
144   }
145 
146   d->comment = new Ogg::XiphComment(commentHeaderData.mid(8));
147 
148   if(readProperties)
149     d->properties = new Properties(this);
150 }
151