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156 lines
3.1 KiB
156 lines
3.1 KiB
/*
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*
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* $Id: k3bffmpegdecoder.cpp 641798 2007-03-12 16:07:10Z trueg $
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* Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
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*
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* This file is part of the K3b project.
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* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* See the file "COPYING" for the exact licensing terms.
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*/
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#include <config.h>
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#include "k3bffmpegdecoder.h"
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#include "k3bffmpegwrapper.h"
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#include <kdebug.h>
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#include <k3bpluginfactory.h>
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extern "C" {
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#include <libavcodec/avcodec.h>
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}
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#include <math.h>
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K_EXPORT_COMPONENT_FACTORY( libk3bffmpegdecoder, K3bPluginFactory<K3bFFMpegDecoderFactory>( "k3bffmpegdecoder" ) )
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K3bFFMpegDecoderFactory::K3bFFMpegDecoderFactory( TQObject* parent, const char* name )
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: K3bAudioDecoderFactory( parent, name )
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{
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}
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K3bFFMpegDecoderFactory::~K3bFFMpegDecoderFactory()
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{
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}
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K3bAudioDecoder* K3bFFMpegDecoderFactory::createDecoder( TQObject* parent,
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const char* name ) const
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{
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return new K3bFFMpegDecoder( parent, name );
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}
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bool K3bFFMpegDecoderFactory::canDecode( const KURL& url )
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{
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K3bFFMpegFile* file = K3bFFMpegWrapper::instance()->open( url.path() );
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if( file ) {
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delete file;
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return true;
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}
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else {
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return false;
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}
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}
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K3bFFMpegDecoder::K3bFFMpegDecoder( TQObject* parent, const char* name )
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: K3bAudioDecoder( parent, name ),
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m_file(0)
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{
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}
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K3bFFMpegDecoder::~K3bFFMpegDecoder()
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{
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}
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TQString K3bFFMpegDecoder::fileType() const
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{
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return m_type;
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}
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bool K3bFFMpegDecoder::analyseFileInternal( K3b::Msf& frames, int& samplerate, int& ch )
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{
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m_file = K3bFFMpegWrapper::instance()->open( filename() );
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if( m_file ) {
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// TODO: call addTechnicalInfo
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addMetaInfo( META_TITLE, m_file->title() );
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addMetaInfo( META_ARTIST, m_file->author() );
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addMetaInfo( META_COMMENT, m_file->comment() );
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samplerate = m_file->sampleRate();
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ch = m_file->channels();
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m_type = m_file->typeComment();
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frames = m_file->length();
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// ffmpeg's length information is not reliable at all
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// so we have to decode the whole file in order to get the correct length
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// char buffer[10*2048];
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// int len = 0;
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// unsigned long long bytes = 0;
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// while( ( len = m_file->read( buffer, 10*2048 ) ) > 0 )
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// bytes += len;
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// frames = (unsigned long)ceil((double)bytes/2048.0);
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// cleanup;
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delete m_file;
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m_file = 0;
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return true;
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}
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else
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return false;
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}
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bool K3bFFMpegDecoder::initDecoderInternal()
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{
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if( !m_file )
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m_file = K3bFFMpegWrapper::instance()->open( filename() );
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return (m_file != 0);
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}
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void K3bFFMpegDecoder::cleanup()
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{
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delete m_file;
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m_file = 0;
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}
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bool K3bFFMpegDecoder::seekInternal( const K3b::Msf& msf )
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{
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if( msf == 0 )
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return initDecoderInternal();
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else
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return m_file->seek( msf );
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}
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int K3bFFMpegDecoder::decodeInternal( char* _data, int maxLen )
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{
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return m_file->read( _data, maxLen );
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}
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#include "k3bffmpegdecoder.moc"
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