workbench/devs/AHI/AHI-Handler/main.h

   1
   2 #include <devices/ahi.h>
   3
   4 #if !defined (__mc68000__) && defined (__GNUC__)
   5 # pragma pack(2)
   6 #endif
   7
   8 struct HandlerData {
   9   BOOL               initialized;    // TRUE if structure initialized, else FALSE
  10   BOOL               writing;        // TRUE if writing, FALSE otherwise
  11   UBYTE             *buffer1;        // Address of read buffer
  12   UBYTE             *buffer2;
  13   LONG               length;         // Offset to first invalid sample frame
  14   LONG               offset;         // Current pointer
  15   struct AHIRequest *readreq;        // IO Request used for reading
  16   struct AHIRequest *writereq1;      // IO Request used for writing
  17   struct AHIRequest *writereq2;      // IO Request used for writing
  18   ULONG              bits;
  19   ULONG              channels;
  20   ULONG              type;
  21   ULONG              freq;
  22   Fixed              vol;
  23   sposition          pos;
  24   LONG               priority;
  25   LONG               totallength;     // Total number of bytes to play/record
  26   LONG               buffersize;      // Play/record buffer size
  27   UBYTE              format;          // See definition below.
  28
  29   struct RDArgs     *rdargs;
  30   struct RDArgs     *rdargs2;
  31   struct {
  32     ULONG           *bits;
  33     ULONG           *channels;
  34     ULONG           *freq;
  35     STRPTR           type;
  36     Fixed           *volume;
  37     sposition       *position;
  38     LONG            *priority;
  39     LONG            *length;
  40     LONG            *seconds;
  41     LONG            *buffersize;
  42     LONG            *unit;
  43
  44     IPTR            format;
  45   }                  args;
  46
  47 };
  48
  49 #define SIGNED   1
  50 #define AIFF     2
  51 #define AIFC     3
  52
  53
  54 /* AIFF and AIFC defines was taken from Olaf `Olsen' Barthel's AIFF DataType. */
  55
  56         // 80 bit IEEE Standard 754 floating point number
  57
  58 typedef struct {
  59         unsigned short  exponent;               // Exponent, bit #15 is sign bit for mantissa
  60         unsigned long   mantissa[2];            // 64 bit mantissa
  61 } extended;
  62
  63         // Audio Interchange Format chunk data
  64
  65 #define ID_AIFF MAKE_ID('A','I','F','F')
  66 #define ID_AIFC MAKE_ID('A','I','F','C')
  67
  68 #define ID_FVER MAKE_ID('F','V','E','R')
  69 #define ID_COMM MAKE_ID('C','O','M','M')
  70 #define ID_SSND MAKE_ID('S','S','N','D')
  71
  72         // "COMM" chunk header
  73
  74 typedef struct {
  75         short           numChannels;            // Number of channels
  76         unsigned long   numSampleFrames;        // Number of sample frames
  77         short           sampleSize;             // Number of bits per sample point
  78         extended        sampleRate;             // Replay rate in samples per second
  79 } CommonChunk;
  80
  81         // The same for "AIFC" type files
  82
  83 #define NO_COMPRESSION MAKE_ID('N','O','N','E') // No sound compression
  84
  85 typedef struct {
  86         short           numChannels;            // Number of channels
  87         unsigned long   numSampleFrames;        // Number of sample frames
  88         short           sampleSize;             // Number of bits per sample point
  89         extended        sampleRate;             // Replay rate in samples per second
  90         unsigned long   compressionType;        // Compression type
  91         char            compressionName[(sizeof("not compressed")+1)&(~1)];
  92 } ExtCommonChunk;
  93
  94
  95         // "SSND" chunk header
  96
  97 typedef struct {
  98         unsigned long   offset,                 // Offset to sound data, for block alignment
  99                         blockSize;              // Size of block data is aligned to
 100 } SampledSoundHeader;
 101
 102         // "FVER" chunk header
 103
 104 typedef struct {
 105         long            timestamp;              // Format version creation date
 106 } FormatVersionHeader;
 107
 108 #define AIFCVersion1 0xA2805140                 // "AIFC" file format version #1
 109
 110
 111 struct AIFCHeader {
 112   ULONG                 FORMid;
 113   ULONG                 FORMsize;
 114   ULONG                 AIFCid;
 115
 116   ULONG                 FVERid;
 117   ULONG                 FVERsize;
 118   FormatVersionHeader   FVERchunk;
 119
 120   ULONG                 COMMid;
 121   ULONG                 COMMsize;
 122   ExtCommonChunk        COMMchunk;
 123
 124   ULONG                 SSNDid;
 125   ULONG                 SSNDsize;
 126   SampledSoundHeader    SSNDchunk;
 127 };
 128
 129 struct AIFFHeader {
 130   ULONG                 FORMid;
 131   ULONG                 FORMsize;
 132   ULONG                 AIFFid;
 133
 134   ULONG                 COMMid;
 135   ULONG                 COMMsize;
 136   CommonChunk           COMMchunk;
 137
 138   ULONG                 SSNDid;
 139   ULONG                 SSNDsize;
 140   SampledSoundHeader    SSNDchunk;
 141 };
 142
 143 #if !defined (__mc68000__) && defined (__GNUC__)
 144 # pragma pack()
 145 #endif