plugins/redbook/redbookreader.cpp

   1 /**
   2  * @file redbookreader.cpp
   3  * @author Wei-Cheng Pan
   4  *
   5  * Copyright (C) 2008 Wei-Cheng Pan <legnaleurc@gmail.com>
   6  *
   7  * This file is part of Khopper.
   8  *
   9  * Khopper is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * Khopper is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22 #include "redbookreader.hpp"
  23
  24 using namespace khopper::codec;
  25 using khopper::error::IOError;
  26
  27 RedbookReader::RedbookReader( const QUrl & uri ):
  28 AbstractReader( uri ),
  29 file_( uri.toLocalFile() ) {
  30         AudioFormat format;
  31         format.setByteOrder( AudioFormat::LittleEndian );
  32         format.setChannels( 2 );
  33         format.setFrequency( 44100 );
  34         format.setSampleSize( 2 );
  35         format.setSampleType( AudioFormat::SignedInt );
  36         this->setAudioFormat( format );
  37 }
  38
  39 bool RedbookReader::atEnd() const {
  40         return this->file_.atEnd();
  41 }
  42
  43 bool RedbookReader::seek( qint64 pos ) {
  44         bool ret = this->AbstractReader::seek( pos );
  45         ret &= this->file_.seek( pos );
  46         return ret;
  47 }
  48
  49 qint64 RedbookReader::size() const {
  50         return this->file_.size();
  51 }
  52
  53 void RedbookReader::doOpen() {
  54         bool ret = this->file_.open( QIODevice::ReadOnly );
  55         if( !ret ) {
  56                 throw IOError( QString( "%1 : %2 (from khopper::codec::RedbookReader)" ).arg( this->file_.fileName() ).arg( this->file_.errorString() ) );
  57         }
  58         this->setDuration( this->file_.size() * 1000 / 44100 / 2 / 2 );
  59 }
  60
  61 void khopper::codec::RedbookReader::doClose() {
  62         this->file_.close();
  63 }
  64
  65 qint64 RedbookReader::readData( char * data, qint64 maxSize ) {
  66         return this->file_.read( data, maxSize );
  67 }
  68