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/*
*
* $Id$
* 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 <tqfile.h>
#include <tqstringlist.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( TQObject* parent, const char* name )
: K3bAudioDecoder( parent, name )
{
d = new Private();
}
K3bOggVorbisDecoder::~K3bOggVorbisDecoder()
{
delete d;
}
bool K3bOggVorbisDecoder::openOggVorbisFile()
{
if( !d->isOpen ) {
FILE* file = fopen( TQFile::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 ) {
TQString comment = TQString::fromUtf8( d->vComment->user_comments[i] );
TQStringList values = TQStringList::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"), TQString::number(d->vInfo->version) );
addTechnicalInfo( i18n("Channels"), TQString::number(d->vInfo->channels) );
addTechnicalInfo( i18n("Sampling Rate"), i18n("%1 Hz").tqarg(d->vInfo->rate) );
if( d->vInfo->bitrate_upper > 0 )
addTechnicalInfo( i18n("Bitrate Upper"), i18n( "%1 bps" ).tqarg(d->vInfo->bitrate_upper) );
if( d->vInfo->bitrate_nominal > 0 )
addTechnicalInfo( i18n("Bitrate Nominal"), i18n( "%1 bps" ).tqarg(d->vInfo->bitrate_nominal) );
if( d->vInfo->bitrate_lower > 0 )
addTechnicalInfo( i18n("Bitrate Lower"), i18n( "%1 bps" ).tqarg(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 );
}
TQString K3bOggVorbisDecoder::fileType() const
{
return i18n("Ogg-Vorbis");
}
K3bOggVorbisDecoderFactory::K3bOggVorbisDecoderFactory( TQObject* parent, const char* name )
: K3bAudioDecoderFactory( parent, name )
{
}
K3bOggVorbisDecoderFactory::~K3bOggVorbisDecoderFactory()
{
}
K3bAudioDecoder* K3bOggVorbisDecoderFactory::createDecoder( TQObject* parent,
const char* name ) const
{
return new K3bOggVorbisDecoder( parent, name );
}
bool K3bOggVorbisDecoderFactory::canDecode( const KURL& url )
{
FILE* file = fopen( TQFile::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"
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