#include <devices/ahi.h>

struct HandlerData {
  BOOL               initialized;    // TRUE if structure initialized, else FALSE
  BOOL               writing;        // TRUE if writing, FALSE otherwise
  UBYTE             *buffer1;        // Address of read buffer
  UBYTE             *buffer2;
  LONG               length;         // Offset to first invalid sample frame
  LONG               offset;         // Current pointer
  struct AHIRequest *readreq;        // IO Request used for reading
  struct AHIRequest *writereq1;      // IO Request used for writing
  struct AHIRequest *writereq2;      // IO Request used for writing
  ULONG              bits;
  ULONG              channels;
  ULONG              type;
  ULONG              freq;
  Fixed              vol;
  sposition          pos;
  LONG               priority;
  LONG               totallength;     // Total number of bytes to play/record
  LONG               buffersize;      // Play/record buffer size
  UBYTE              format;          // See definition below.

  struct RDArgs     *rdargs;
  struct RDArgs     *rdargs2;
  struct {
    ULONG           *bits;
    ULONG           *channels;
    ULONG           *freq;
    STRPTR           type;
    Fixed           *volume;
    sposition       *position;
    LONG            *priority;
    LONG            *length;
    LONG            *seconds;
    LONG            *buffersize;
    LONG            *unit;

    UWORD            format;
  }                  args;

};

#define SIGNED   1
#define AIFF     2
#define AIFC     3


/* AIFF and AIFC defines was taken from Olaf `Olsen' Barthel's AIFF DataType. */

	// 80 bit IEEE Standard 754 floating point number

typedef struct {
	unsigned short	exponent;		// Exponent, bit #15 is sign bit for mantissa
	unsigned long	mantissa[2];		// 64 bit mantissa
} extended;

	// Audio Interchange Format chunk data

#define ID_AIFF MAKE_ID('A','I','F','F')
#define ID_AIFC MAKE_ID('A','I','F','C')

#define ID_FVER MAKE_ID('F','V','E','R')
#define ID_COMM MAKE_ID('C','O','M','M')
#define ID_SSND MAKE_ID('S','S','N','D')

	// "COMM" chunk header

typedef struct {
	short		numChannels;		// Number of channels
	unsigned long	numSampleFrames;	// Number of sample frames
	short		sampleSize;		// Number of bits per sample point
	extended	sampleRate;		// Replay rate in samples per second
} CommonChunk;

	// The same for "AIFC" type files

#define NO_COMPRESSION MAKE_ID('N','O','N','E') // No sound compression

typedef struct {
	short		numChannels;		// Number of channels
	unsigned long	numSampleFrames;	// Number of sample frames
	short		sampleSize;		// Number of bits per sample point
	extended	sampleRate;		// Replay rate in samples per second
	unsigned long	compressionType;	// Compression type
	char		compressionName[(sizeof("not compressed")+1)&(~1)];
} ExtCommonChunk;


	// "SSND" chunk header

typedef struct {
	unsigned long	offset, 		// Offset to sound data, for block alignment
			blockSize;		// Size of block data is aligned to
} SampledSoundHeader;

	// "FVER" chunk header

typedef struct {
	long		timestamp;		// Format version creation date
} FormatVersionHeader;

#define AIFCVersion1 0xA2805140 		// "AIFC" file format version #1


struct AIFCHeader {
  ULONG                 FORMid;
  ULONG                 FORMsize;
  ULONG                 AIFCid;

  ULONG                 FVERid;
  ULONG                 FVERsize;
  FormatVersionHeader   FVERchunk;

  ULONG                 COMMid;
  ULONG                 COMMsize;
  ExtCommonChunk        COMMchunk;

  ULONG                 SSNDid;
  ULONG                 SSNDsize;
  SampledSoundHeader    SSNDchunk;
};

struct AIFFHeader {
  ULONG                 FORMid;
  ULONG                 FORMsize;
  ULONG                 AIFFid;

  ULONG                 COMMid;
  ULONG                 COMMsize;
  CommonChunk           COMMchunk;

  ULONG                 SSNDid;
  ULONG                 SSNDsize;
  SampledSoundHeader    SSNDchunk;
};