workbench/classes/datatypes/wav/include/decoders.h

   1 /*
   2  *      wave.datatype by Fredrik Wikstrom
   3  *
   4  */
   5
   6 #ifndef WAVE_DECODERS_H
   7 #define WAVE_DECODERS_H
   8
   9 #include <sys/types.h>
  10
  11 #define DEC_SETUPPROTO(NAME) \
  12 LONG NAME (struct DecoderData *data)
  13
  14 #define DEC_CLEANUPPROTO(NAME) \
  15 void NAME (struct DecoderData *data)
  16
  17 #define DECODERPROTO(NAME) \
  18 LONG NAME (struct DecoderData *data, struct WaveFormatEx *fmt, UBYTE *Src, BYTE **Dst, LONG numBlocks, LONG numFrames)
  19
  20 #define DECODERPROTO_v2(NAME) \
  21 LONG NAME (struct DecoderData *data, BPTR file, BYTE **Dst, LONG totalFrames, LONG *decFrames)
  22
  23 struct DecoderData {
  24         struct ClassBase        *libBase;
  25         struct RIFFChunk        chunk;
  26         struct WaveFormatEx     *fmt;
  27         LONG                            blockFrames;
  28         void *                          state;  // decoder-specific data
  29         DECODERPROTO((*Decode));
  30         DECODERPROTO((*DecodeFrames));
  31 };
  32
  33 struct Decoder {
  34         UWORD   formatTag;
  35         UWORD   pad;
  36         DEC_SETUPPROTO((*Setup));
  37         DEC_CLEANUPPROTO((*Cleanup));
  38         DECODERPROTO((*Decode));
  39         DECODERPROTO((*DecodeFrames));
  40 };
  41
  42 struct Decoder * GetDecoder(UWORD fmtTag);
  43
  44 #endif