diff options
Diffstat (limited to 'plugins/decoder/libsndfile/k3blibsndfiledecoder.cpp')
| -rw-r--r-- | plugins/decoder/libsndfile/k3blibsndfiledecoder.cpp | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/plugins/decoder/libsndfile/k3blibsndfiledecoder.cpp b/plugins/decoder/libsndfile/k3blibsndfiledecoder.cpp new file mode 100644 index 0000000..ea3d014 --- /dev/null +++ b/plugins/decoder/libsndfile/k3blibsndfiledecoder.cpp @@ -0,0 +1,254 @@ +/* + * + * $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" |