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include/cinder/audio/SourceFile.h

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00001 /*
00002  Copyright (c) 2009, The Barbarian Group
00003  All rights reserved.
00004 
00005  Redistribution and use in source and binary forms, with or without modification, are permitted provided that
00006  the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice, this list of conditions and
00009     the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
00011     the following disclaimer in the documentation and/or other materials provided with the distribution.
00012 
00013  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
00014  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00015  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
00016  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00017  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00018  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00019  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00020  POSSIBILITY OF SUCH DAMAGE.
00021 */
00022 
00023 #pragma once
00024 
00025 #include "cinder/Cinder.h"
00026 #include "cinder/audio/Io.h"
00027 #include "cinder/audio/Buffer.h"
00028 #include "cinder/audio/CocoaCaConverter.h"
00029 
00030 #include <AudioToolbox/AudioFile.h>
00031 
00032 
00033 namespace cinder { namespace audio {
00034 
00035 typedef shared_ptr<class SourceFile>    SourceFileRef;
00036 typedef shared_ptr<class LoaderSourceFile>  LoaderSourceFileRef;
00037 
00038 class LoaderSourceFile : public Loader {
00039  public:
00040     static LoaderSourceFileRef  createRef( SourceFile *source, Target *target );
00041     
00042     ~LoaderSourceFile() {}
00043     
00044     uint64_t getSampleOffset() const;
00045     void setSampleOffset( uint64_t anOffset );
00046     void loadData( uint32_t *ioSampleCount, BufferList *ioData );
00047  private:
00048     static void dataInputCallback( Loader* aLoader, uint32_t *ioSampleCount, BufferList *ioData, AudioStreamPacketDescription * packetDescriptions );
00049 
00050     LoaderSourceFile( SourceFile *source, Target *target );
00051     
00052     SourceFile                      * mSource;
00053     shared_ptr<CocoaCaConverter>    mConverter;
00054     uint64_t                        mPacketOffset;
00055         
00056 };
00057 
00058 class SourceFile : public Source {
00059   public:
00060     static SourceRef        createRef( DataSourceRef dataSourceRef ) { return createFileRef( dataSourceRef ); }
00061     static SourceFileRef    createFileRef( DataSourceRef dataSourceRef );
00062     ~SourceFile();
00063 
00064     virtual LoaderRef getLoader( Target *target ) { return LoaderSourceFile::createRef( this, target ); }
00065 
00066     double getDuration() const { return mDuration; };
00067 
00068     static void     registerSelf();
00069   protected:
00070     SourceFile( DataSourceRef dataSourceRef );
00071     
00072     uint64_t packetAtTime( double aTime ) const;
00073     double timeAtPacket( uint64_t aPacket ) const;
00074     
00075     uint64_t packetAtSample( uint64_t aSample ) const;
00076     uint64_t sampleAtPacket( uint64_t aPacket ) const;
00077     
00078     shared_ptr<OpaqueAudioFileID>   mFileRef;
00079     
00080     uint64_t    mPacketCount;
00081     uint64_t    mByteCount;
00082     double      mDuration;
00083     uint32_t    mMaxPacketSize;
00084     
00085     friend class LoaderSourceFile;
00086 };
00087 
00088 REGISTER_AUDIOIO( SourceFile )
00089 
00090 }} // namespace
00091