/thirdparty/liblastfm2/src/fingerprint/EXAMPLE.cpp

 1/*
 2   Copyright 2009 Last.fm Ltd. 
 3      - Primarily authored by Max Howell, Jono Cole and Doug Mansell
 4
 5   This file is part of liblastfm.
 6
 7   liblastfm is free software: you can redistribute it and/or modify
 8   it under the terms of the GNU General Public License as published by
 9   the Free Software Foundation, either version 3 of the License, or
10   (at your option) any later version.
11
12   liblastfm is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with liblastfm.  If not, see <http://www.gnu.org/licenses/>.
19*/
20#include <lastfm/Fingerprint>
21#include <lastfm/FingerprintId>
22#include <QtCore>
23#include <QtNetwork>
24
25using namespace lastfm;
26
27
28static void finish( QNetworkReply* reply )
29{
30    QEventLoop loop;
31    loop.connect( reply, SIGNAL(finished()), SLOT(quit()) );
32    loop.exec();
33}
34
35
36int main( int argc, char** argv )
37{
38    QCoreApplication app( argc, argv );
39    
40    // these fields are required
41    MutableTrack t;
42    t.setArtist( "Air" );
43    t.setTitle( "Redhead Girl" );
44    t.setAlbum( "Pocket Symphony" );
45    t.setUrl( QUrl::fromLocalFile( "/Users/mxcl/Music/iTunes/iTunes Music/Air/Pocket Symphony/1-11 Redhead Girl.mp3") );
46    
47    try
48    {
49        Fingerprint fp( t );
50        
51        // we cache FingerprintIds in an sqlite3 db, as the generate() function
52        // is expensive
53        if (fp.id().isNull())
54        {
55            // this generates the full fingerprint hash, which is about 20kB
56            fp.generate();
57            
58            // this asks Last.fm for a FingerprintId
59            // the finish function is a Qt hack to allow syncronous HTTP
60            finish( fp.submit() );
61            
62            // the decode step sets the FingerprintId
63            // the FingerprintId is required to obtain suggestions
64            // id will now be valid, or this function throws
65            fp.decode( reply );
66        }
67
68        finish( fp.id().getSuggestions() );
69
70        qDebug() << FingerprintId::getSuggestions( reply );
71    }
72    catch (Fingerprint::Error e)
73    {
74        qWarning() << e; //TODO enum debug thing
75    }    
76}