/*

     File: CAAudioFileFormats.h 

 Abstract:  Part of CoreAudio Utility Classes  

  Version: 1.01 

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*/

#ifndef __CAAudioFileFormats_h__

#define __CAAudioFileFormats_h__

#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)

    #include <AudioToolbox/AudioToolbox.h>

#else

    #include <AudioToolbox.h>

#endif

#include "CAStreamBasicDescription.h"

class CAAudioFileFormats {

public:

    enum { noErr = 0 };

    struct DataFormatInfo {

        DataFormatInfo() : mVariants(NULL) { }

        ~DataFormatInfo() { delete[] mVariants; }

        UInt32                          mFormatID;

        int                             mNumVariants;

        AudioStreamBasicDescription *   mVariants;

        bool                            mReadable;

        bool                            mWritable;

        bool                            mEitherEndianPCM;

#if DEBUG

        void    DebugPrint();

#endif

    };

    struct FileFormatInfo {

        FileFormatInfo() : mFileTypeName(NULL), mExtensions(NULL), mDataFormats(NULL) { }

        ~FileFormatInfo() {

            delete[] mDataFormats;

            if (mFileTypeName)

                CFRelease(mFileTypeName);

            if (mExtensions)

                CFRelease(mExtensions);

        }

        AudioFileTypeID                 mFileTypeID;

        CFStringRef                     mFileTypeName;

        CFArrayRef                      mExtensions;

        int                             mNumDataFormats;

        DataFormatInfo *                mDataFormats;       // NULL until loaded!

        int     NumberOfExtensions() { return mExtensions ? CFArrayGetCount(mExtensions) : 0; }

        char *  GetExtension(int index, char *buf, int buflen) {

                    CFStringRef cfext = (CFStringRef)CFArrayGetValueAtIndex(mExtensions, index);

                    CFStringGetCString(cfext, buf, buflen, kCFStringEncodingUTF8);

                    return buf;

                }

        bool    MatchExtension(CFStringRef testExt) {   // testExt should not include "."

                    CFIndex n = NumberOfExtensions();

                    for (CFIndex i = 0; i < n; ++i) {

                        CFStringRef ext = (CFStringRef)CFArrayGetValueAtIndex(mExtensions, i);

                        if (CFStringCompare(ext, testExt, kCFCompareCaseInsensitive) == kCFCompareEqualTo)

                            return true;

                    }

                    return false;

                }

        bool    AnyWritableFormats();

        void    LoadDataFormats();

#if DEBUG

        void    DebugPrint();

#endif

    };

private:    // use Instance()

    CAAudioFileFormats(bool loadDataFormats);

    ~CAAudioFileFormats();

public:

    bool    InferDataFormatFromFileFormat(AudioFileTypeID filetype, CAStreamBasicDescription &fmt);

    bool    InferFileFormatFromFilename(const char *filename, AudioFileTypeID &filetype);

    bool    InferFileFormatFromFilename(CFStringRef filename, AudioFileTypeID &filetype);

    bool    InferFileFormatFromDataFormat(const CAStreamBasicDescription &fmt, AudioFileTypeID &filetype);

    bool    IsKnownDataFormat(UInt32 dataFormat);

#if DEBUG

    void    DebugPrint();

#endif

    int                 mNumFileFormats;

    FileFormatInfo  *   mFileFormats;

    FileFormatInfo *    FindFileFormat(UInt32 formatID);

    static CAAudioFileFormats * Instance(bool loadDataFormats=true);

private:    

    static CAAudioFileFormats * sInstance;

};

char *  OSTypeToStr(char *buf, UInt32 t);

int     StrToOSType(const char *str, UInt32 &t);

#endif // __CAAudioFileFormats_h__