diff options
Diffstat (limited to 'plugins/decoder/ogg/k3boggvorbisdecoder.cpp')
| -rw-r--r-- | plugins/decoder/ogg/k3boggvorbisdecoder.cpp | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/plugins/decoder/ogg/k3boggvorbisdecoder.cpp b/plugins/decoder/ogg/k3boggvorbisdecoder.cpp new file mode 100644 index 0000000..15ca665 --- /dev/null +++ b/plugins/decoder/ogg/k3boggvorbisdecoder.cpp @@ -0,0 +1,252 @@ +/* + * + * $Id$ + * Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org> + * + * This file is part of the K3b project. + * Copyright (C) 1998-2007 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 <config.h> + +#include "k3boggvorbisdecoder.h" + +#include <k3bpluginfactory.h> + +#include <qfile.h> +#include <qstringlist.h> + +#include <kurl.h> +#include <kdebug.h> +#include <klocale.h> + +#include <stdio.h> +#include <stdlib.h> +#include <vorbis/codec.h> +#include <vorbis/vorbisfile.h> + + +K_EXPORT_COMPONENT_FACTORY( libk3boggvorbisdecoder, K3bPluginFactory<K3bOggVorbisDecoderFactory>( "libk3boggvorbisdecoder" ) ) + + +class K3bOggVorbisDecoder::Private +{ +public: + Private() + : vInfo(0), + vComment(0), + isOpen(false) { + } + + OggVorbis_File oggVorbisFile; + vorbis_info* vInfo; + vorbis_comment* vComment; + bool isOpen; +}; + + +K3bOggVorbisDecoder::K3bOggVorbisDecoder( QObject* parent, const char* name ) + : K3bAudioDecoder( parent, name ) +{ + d = new Private(); +} + + +K3bOggVorbisDecoder::~K3bOggVorbisDecoder() +{ + delete d; +} + + +bool K3bOggVorbisDecoder::openOggVorbisFile() +{ + if( !d->isOpen ) { + FILE* file = fopen( QFile::encodeName(filename()), "r" ); + if( !file ) { + kdDebug() << "(K3bOggVorbisDecoder) Could not open file " << filename() << endl; + return false; + } + else if( ov_open( file, &d->oggVorbisFile, 0, 0 ) ) { + kdDebug() << "(K3bOggVorbisDecoder) " << filename() + << " seems not to to be an ogg vorbis file." << endl; + fclose( file ); + return false; + } + } + + d->isOpen = true; + return true; +} + + +bool K3bOggVorbisDecoder::analyseFileInternal( K3b::Msf& frames, int& samplerate, int& ch ) +{ + cleanup(); + + if( openOggVorbisFile() ) { + // check length of track + double seconds = ov_time_total( &d->oggVorbisFile, -1 ); + if( seconds == OV_EINVAL ) { + kdDebug() << "(K3bOggVorbisDecoder) Could not determine length of file " << filename() << endl; + cleanup(); + return false; + } + else { + + d->vInfo = ov_info( &d->oggVorbisFile, -1 /* current bitstream */ ); + d->vComment = ov_comment( &d->oggVorbisFile, -1 ); + + // add meta tags + for( int i = 0; i < d->vComment->comments; ++i ) { + QString comment = QString::fromUtf8( d->vComment->user_comments[i] ); + QStringList values = QStringList::split( "=", comment ); + if( values.count() > 1 ) { + if( values[0].lower() == "title" ) + addMetaInfo( META_TITLE, values[1] ); + else if( values[0].lower() == "artist" ) + addMetaInfo( META_ARTIST, values[1] ); + else if( values[0].lower() == "description" ) + addMetaInfo( META_COMMENT, values[1] ); + } + } + + + // add technical infos + addTechnicalInfo( i18n("Version"), QString::number(d->vInfo->version) ); + addTechnicalInfo( i18n("Channels"), QString::number(d->vInfo->channels) ); + addTechnicalInfo( i18n("Sampling Rate"), i18n("%1 Hz").arg(d->vInfo->rate) ); + if( d->vInfo->bitrate_upper > 0 ) + addTechnicalInfo( i18n("Bitrate Upper"), i18n( "%1 bps" ).arg(d->vInfo->bitrate_upper) ); + if( d->vInfo->bitrate_nominal > 0 ) + addTechnicalInfo( i18n("Bitrate Nominal"), i18n( "%1 bps" ).arg(d->vInfo->bitrate_nominal) ); + if( d->vInfo->bitrate_lower > 0 ) + addTechnicalInfo( i18n("Bitrate Lower"), i18n( "%1 bps" ).arg(d->vInfo->bitrate_lower) ); + + frames = K3b::Msf::fromSeconds(seconds); + samplerate = d->vInfo->rate; + ch = d->vInfo->channels; + + cleanup(); + + return true; + } + } + else + return false; +} + + +bool K3bOggVorbisDecoder::initDecoderInternal() +{ + cleanup(); + return openOggVorbisFile(); +} + + +int K3bOggVorbisDecoder::decodeInternal( char* data, int maxLen ) +{ + int bitStream = 0; + long bytesRead = ov_read( &d->oggVorbisFile, + data, + maxLen, // max length to be read + 1, // big endian + 2, // word size: 16-bit samples + 1, // signed + &bitStream ); // current bitstream + + if( bitStream != 0 ) { + kdDebug() << "(K3bOggVorbisDecoder) bitstream != 0. Multible bitstreams not supported." << endl; + return -1; + } + + else if( bytesRead == OV_HOLE ) { + kdDebug() << "(K3bOggVorbisDecoder) OV_HOLE" << endl; + // recursive new try + return decodeInternal( data, maxLen ); + } + + else if( bytesRead < 0 ) { + kdDebug() << "(K3bOggVorbisDecoder) Error: " << bytesRead << endl; + return -1; + } + + else if( bytesRead == 0 ) { + kdDebug() << "(K3bOggVorbisDecoder) successfully finished decoding." << endl; + return 0; + } + + else { + return bytesRead; + } +} + + +void K3bOggVorbisDecoder::cleanup() +{ + if( d->isOpen ) + ov_clear( &d->oggVorbisFile ); + d->isOpen = false; + d->vComment = 0; + d->vInfo = 0; +} + + +bool K3bOggVorbisDecoder::seekInternal( const K3b::Msf& pos ) +{ + return ( ov_pcm_seek( &d->oggVorbisFile, pos.pcmSamples() ) == 0 ); +} + + +QString K3bOggVorbisDecoder::fileType() const +{ + return i18n("Ogg-Vorbis"); +} + + +K3bOggVorbisDecoderFactory::K3bOggVorbisDecoderFactory( QObject* parent, const char* name ) + : K3bAudioDecoderFactory( parent, name ) +{ +} + + +K3bOggVorbisDecoderFactory::~K3bOggVorbisDecoderFactory() +{ +} + + +K3bAudioDecoder* K3bOggVorbisDecoderFactory::createDecoder( QObject* parent, + const char* name ) const +{ + return new K3bOggVorbisDecoder( parent, name ); +} + + +bool K3bOggVorbisDecoderFactory::canDecode( const KURL& url ) +{ + FILE* file = fopen( QFile::encodeName(url.path()), "r" ); + if( !file ) { + kdDebug() << "(K3bOggVorbisDecoder) Could not open file " << url.path() << endl; + return false; + } + + OggVorbis_File of; + + if( ov_open( file, &of, 0, 0 ) ) { + fclose( file ); + kdDebug() << "(K3bOggVorbisDecoder) not an Ogg-Vorbis file: " << url.path() << endl; + return false; + } + + ov_clear( &of ); + + return true; +} + + +#include "k3boggvorbisdecoder.moc" |