MonoAudioFileWriter.cxx

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/*
 * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "MonoAudioFileWriter.hxx"
#include "AudioCodecs_Stream.hxx"
#include "FileSystem.hxx"
#include "ProcessingFactory.hxx"


namespace CLAM
{

namespace Hidden
{
        static const char * metadata[] = {
                "key", "MonoAudioFileWriter",
                "category", "Audio File I/O",
                "description", "MonoAudioFileWriter",
                0
        };
        static FactoryRegistrator<ProcessingFactory, MonoAudioFileWriter> reg = metadata;
}
        
        
        MonoAudioFileWriter::MonoAudioFileWriter()
                : mInput( "Samples Write", this ),
                  mOutStream( NULL )
        {
                Configure( MonoAudioFileWriterConfig() );
        }

        MonoAudioFileWriter::MonoAudioFileWriter( const ProcessingConfig& cfg )
                : mInput( "Samples Write", this ),
                  mOutStream( NULL )
        {
                Configure( cfg );
        }

        MonoAudioFileWriter::~MonoAudioFileWriter()
        {
                if ( mOutStream )
                        delete mOutStream;
                if ( mConfig.HasTargetFile() )
                        FileSystem::GetInstance().UnlockFile( mConfig.GetTargetFile() );
        }

        const char* MonoAudioFileWriter::GetClassName() const
        {
                return "MonoAudioFileWriter";
        }
        
        const ProcessingConfig& MonoAudioFileWriter::GetConfig() const
        {
                return mConfig;
        }

        bool MonoAudioFileWriter::Do()
        {
                bool result = Do( mInput.GetAudio() );
                mInput.Consume();
                return result;          
        }
        
        bool MonoAudioFileWriter::Do( const Audio & data )
        {
                mOutStream->WriteData( 0, data.GetBuffer().GetPtr(), data.GetSize() );
                return true;
        }

        bool MonoAudioFileWriter::ConcreteConfigure( const ProcessingConfig& cfg )
        {
                if ( mConfig.HasTargetFile() )
                        FileSystem::GetInstance().UnlockFile( mConfig.GetTargetFile() );

                CopyAsConcreteConfig( mConfig, cfg );

                const std::string & location = mConfig.GetTargetFile();

                if ( location == "")
                {
                        AddConfigErrorMessage("No file selected");
                        return false;
                }
                AudioFileHeader header;
                header.SetValues( mConfig.GetSampleRate(), 1, EAudioFileFormat::FormatFromFilename(location));
                mFile.CreateNew(location, header);
                if ( ! mFile.GetHeader().HasChannels())
                {
                        AddConfigErrorMessage("The file is not writeable");
                        return false;
                }
                if ( mFile.GetHeader().GetChannels() != 1 ) // this is the 'mono' file writer...
                {
                        AddConfigErrorMessage("Too many channels!");
                        return false;
                }

                if ( !mFile.IsWritable() )
                {
                        AddConfigErrorMessage("The format does not support such number of channels, endiannes or sampling rate.");
                        return false;
                }

                if ( FileSystem::GetInstance().IsFileLocked( mConfig.GetTargetFile() ) )
                {
                        AddConfigErrorMessage("File: ");
                        AddConfigErrorMessage(mConfig.GetTargetFile() );
                        AddConfigErrorMessage(" has been locked by another Processing");

                        return false;
                }

                FileSystem::GetInstance().LockFile( mConfig.GetTargetFile() );

                mOutStream = mFile.GetStream();

                if ( !mOutStream )
                {
                        AddConfigErrorMessage("Could not get a valid audio file stream!");
                        return false;                   
                }

                return true;
        }

        bool MonoAudioFileWriter::ConcreteStart()
        {
                mOutStream->PrepareWriting();
                
                return true;
        }

        bool MonoAudioFileWriter::ConcreteStop()
        {
                mOutStream->Dispose();
                delete mOutStream;
                mOutStream = NULL;

                return true;
        }
}

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