CWE-ou-minkata/Sources/Plasma/PubUtilLib/plAudioCore/plSoundBuffer.h

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*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//                                                                          //
//  plSoundBuffer - Quick, dirty, and highly optimized class for reading    //
//                    in the samples of a WAV file when you're in a hurry.  //
//                    ONLY WORKS WITH PCM (i.e. uncompressed) DATA          //
//                                                                          //
//                  Now loads data asynchronously. When fLoading is true    //
//                  do not touch any data in the soundbuffer                //
//////////////////////////////////////////////////////////////////////////////

#ifndef _plSoundBuffer_h
#define _plSoundBuffer_h

#include "pnKeyedObject/hsKeyedObject.h"
#include "plAudioCore.h"
#include "plAudioFileReader.h"
#include "hsThread.h"
#include "plFileSystem.h"
#include <mutex>

//// Class Definition ////////////////////////////////////////////////////////

class plUnifiedTime;
class plAudioFileReader;
class plSoundBuffer : public hsKeyedObject
{
public:
    plSoundBuffer();
    plSoundBuffer( const plFileName &fileName, uint32_t flags = 0 );
    ~plSoundBuffer();
    
    CLASSNAME_REGISTER( plSoundBuffer );
    GETINTERFACE_ANY( plSoundBuffer, hsKeyedObject );
    
    enum Flags
    {
        kIsExternal         = 0x0001,
        kAlwaysExternal     = 0x0002,
        kOnlyLeftChannel    = 0x0004,
        kOnlyRightChannel   = 0x0008,
        kStreamCompressed   = 0x0010,
    };

    enum ELoadReturnVal
    {
        kSuccess,
        kError,
        kPending,
    };

    void            RoundDataPos( uint32_t &pos );

    virtual void    Read( hsStream *s, hsResMgr *mgr );
    virtual void    Write( hsStream *s, hsResMgr *mgr );

    plWAVHeader &GetHeader( void )              { return fHeader; }
    uint32_t    GetDataLength( void ) const     { return fDataLength; }
    void        SetDataLength(unsigned length)  { fDataLength = length; } 
    void       *GetData( void ) const           { return fData; }
    plFileName  GetFileName( void ) const       { return fFileName; }
    bool        IsValid( void ) const           { return fValid; }
    float       GetDataLengthInSecs( void ) const;

    void                SetFileName( const plFileName &name );
    bool                HasFlag( uint32_t flag ) { return ( fFlags & flag ) ? true : false; }
    void                SetFlag( uint32_t flag, bool yes = true ) { if( yes ) fFlags |= flag; else fFlags &= ~flag; }

    // Must be called until return value is kSuccess. starts an asynchronous load first time called. returns kSuccess when finished.
    ELoadReturnVal      AsyncLoad( plAudioFileReader::StreamType type, unsigned length = 0 );   
    void                UnLoad( );

    plAudioCore::ChannelSelect  GetReaderSelect( void ) const;

    
    static void         Init();
    static void         Shutdown();
    plAudioFileReader * GetAudioReader();   // transfers ownership to caller
    void                SetAudioReader(plAudioFileReader *reader);
    void                SetLoaded(bool loaded);

    plAudioFileReader::StreamType   GetAudioReaderType() { return fStreamType; }
    unsigned                        GetAsyncLoadLength() { return fAsyncLoadLength ? fAsyncLoadLength : fDataLength; }

    // for plugins only
    void                SetInternalData( plWAVHeader &header, uint32_t length, uint8_t *data );
    ELoadReturnVal      EnsureInternal( );  
    void                SetError() { fError = true; }

protected:

    // plSoundBuffers can be two ways--they can either have a filename and no
    // data, in which case they reference a file in the sfx folder, or they
    // can store the data directly
    
    void            IInitBuffer();

    bool            IGrabHeaderInfo( void );
    void            IAddBuffers( void *base, void *toAdd, uint32_t lengthInBytes, uint8_t bitsPerSample );
    plFileName      IGetFullPath();

    uint32_t        fFlags;
    bool            fValid;
    uint32_t        fDataRead;
    plFileName      fFileName;

    bool            fLoaded;
    bool            fLoading;
    bool            fError;
    
    plAudioFileReader * fReader;
    uint8_t *           fData;
    plWAVHeader         fHeader;
    uint32_t            fDataLength;
    uint32_t            fAsyncLoadLength;
    plAudioFileReader::StreamType fStreamType;

    // for plugins only
    plAudioFileReader   *IGetReader( bool fullpath );
};


class plSoundPreloader : public hsThread
{
protected:
    hsTArray<plSoundBuffer*> fBuffers;
    hsEvent fEvent;
    bool fRunning;
    std::mutex fCritSect;

public:
    virtual hsError Run();

    virtual void Start() {
        fRunning = true;
        hsThread::Start();
    }

    virtual void Stop() {
        fRunning = false;
        fEvent.Signal();
        hsThread::Stop();
    }

    bool IsRunning() const { return fRunning; }

    void AddBuffer(plSoundBuffer* buffer) {
        {
            std::lock_guard<std::mutex> lock(fCritSect);
            fBuffers.Push(buffer);
        }

        fEvent.Signal();
    }
};

#endif //_plSoundBuffer_h