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/*
*
* $Id: k3blibsndfiledecoder.cpp 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2004 Matthieu Bedouet <mbedouet@no-log.org>
* 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 "k3blibsndfiledecoder.h"
#include <k3bpluginfactory.h>
#include <qfile.h>
#include <qstringlist.h>
#include <kurl.h>
#include <kdebug.h>
#include <klocale.h>
#include <kinstance.h>
#include <math.h>
#include <stdio.h>
#include <sndfile.h>
K_EXPORT_COMPONENT_FACTORY( libk3blibsndfiledecoder, K3bPluginFactory<K3bLibsndfileDecoderFactory>( "libk3blibsndfiledecoder" ) )
class K3bLibsndfileDecoder::Private
{
public:
Private():
isOpen(false),
buffer(0),
bufferSize(0) {
format_info.name = 0;
}
SNDFILE *sndfile;
SF_INFO sndinfo;
SF_FORMAT_INFO format_info;
bool isOpen;
float* buffer;
int bufferSize;
};
K3bLibsndfileDecoder::K3bLibsndfileDecoder( QObject* parent, const char* name )
: K3bAudioDecoder( parent, name )
{
d = new Private();
}
K3bLibsndfileDecoder::~K3bLibsndfileDecoder()
{
delete d;
}
QString K3bLibsndfileDecoder::fileType() const
{
if( d->format_info.name )
return QString::fromLocal8Bit(d->format_info.name);
else
return "-";
}
bool K3bLibsndfileDecoder::openFile()
{
if( !d->isOpen ) {
cleanup();
d->sndinfo.format = 0;
d->sndfile = sf_open (QFile::encodeName(filename()), SFM_READ, &d->sndinfo);
if ( !d->sndfile ) {
kdDebug() << "(K3bLibsndfileDecoder::openLibsndfileFile) : " << sf_strerror(d->sndfile) << endl;
return false;
}
else {
//retrieve infos (name, extension) about the format:
d->format_info.format = d->sndinfo.format & SF_FORMAT_TYPEMASK ;
sf_command (d->sndfile, SFC_GET_FORMAT_INFO, &d->format_info, sizeof (SF_FORMAT_INFO)) ;
d->isOpen = true;
kdDebug() << "(K3bLibsndfileDecoder::openLibsndfileFile) " << d->format_info.name << " file opened " << endl;
return true;
}
}
return d->isOpen;
}
bool K3bLibsndfileDecoder::analyseFileInternal( K3b::Msf& frames, int& samplerate, int& ch )
{
cleanup();
if( openFile() ) {
// check length of track
if ( d->sndinfo.frames <= 0 ) {
kdDebug() << "(K3bLibsndfileDecoder::analyseFileInternal) Could not determine length of file "
<< filename() << endl;
cleanup();
return false;
}
else {
addMetaInfo( META_TITLE, sf_get_string(d->sndfile, SF_STR_TITLE) );
addMetaInfo( META_ARTIST, sf_get_string(d->sndfile, SF_STR_ARTIST) );
addMetaInfo( META_COMMENT, sf_get_string(d->sndfile, SF_STR_COMMENT) );
addTechnicalInfo( i18n("Channels"), QString::number(d->sndinfo.channels) );
addTechnicalInfo( i18n("Sampling Rate"), i18n("%1 Hz").arg(d->sndinfo.samplerate) );
frames = (unsigned long)ceil(d->sndinfo.frames / d->sndinfo.samplerate * 75.0);
samplerate = d->sndinfo.samplerate;
ch = d->sndinfo.channels;
kdDebug() << "(K3bLibsndfileDecoder) successfully analysed file: " << frames << " frames." << endl;
cleanup();
return true;
}
}
else
return false;
}
bool K3bLibsndfileDecoder::initDecoderInternal()
{
cleanup();
return openFile();
}
int K3bLibsndfileDecoder::decodeInternal( char* data, int maxLen )
{
if( !d->buffer ) {
d->buffer = new float[maxLen];
d->bufferSize = maxLen/2;
}
int read = (int) sf_read_float(d->sndfile, d->buffer,d->bufferSize) ;
fromFloatTo16BitBeSigned( d->buffer, data, read );
read = read * 2;
if( read < 0 ) {
kdDebug() << "(K3bLibsndfileDecoder::decodeInternal) Error: " << read << endl;
return -1;
}
else if( read == 0 ) {
kdDebug() << "(K3bLibsndfileDecoder::decodeInternal) successfully finished decoding." << endl;
return 0;
}
else if( read != maxLen ) {
kdDebug() << "(K3bLibsndfileDecoder::decodeInternal) read:" << read << " expected:" << maxLen << endl;
return -1;
}
else
return read;
}
bool K3bLibsndfileDecoder::seekInternal( const K3b::Msf& pos)
{
return ( sf_seek( d->sndfile, pos.pcmSamples(), SEEK_SET ) == 0 );
}
void K3bLibsndfileDecoder::cleanup()
{
if( d->isOpen ) {
kdDebug() << "(K3bLibsndfileDecoder) cleaning up." << endl;
sf_close( d->sndfile );
d->isOpen = false;
}
}
/********************************************************/
K3bLibsndfileDecoderFactory::K3bLibsndfileDecoderFactory( QObject* parent, const char* name )
: K3bAudioDecoderFactory( parent, name )
{
}
K3bLibsndfileDecoderFactory::~K3bLibsndfileDecoderFactory()
{
}
K3bAudioDecoder* K3bLibsndfileDecoderFactory::createDecoder( QObject* parent,
const char* name ) const
{
return new K3bLibsndfileDecoder( parent, name );
}
bool K3bLibsndfileDecoderFactory::canDecode( const KURL& url )
{
SF_INFO infos;
infos.format = 0;
SNDFILE* sndfile = sf_open (QFile::encodeName(url.path()), SFM_READ, &infos);
//is it supported by libsndfile?
if ( !sndfile ) {
kdDebug() << "(K3bLibsndfileDecoder) " << sf_strerror(sndfile) << endl;
return false;
}
//we exclude only WAVE as there is another plugin for this
else if ( infos.format && ((infos.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_WAV) ) {
//retrieve infos (name) about the format:
SF_FORMAT_INFO format_info;
format_info.format = infos.format & SF_FORMAT_TYPEMASK ;
sf_command (sndfile, SFC_GET_FORMAT_INFO, &format_info, sizeof (format_info)) ;
kdDebug() << "(K3bLibsndfileDecoder) " << format_info.name << " file === OK === " << endl;
sf_close( sndfile );
return true;
}
else {
kdDebug() << "(K3bLibsndfileDecoder) " << url.path() << "not supported" << endl;
sf_close( sndfile );
return false;
}
return false;
}
#include "k3blibsndfiledecoder.moc"
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