utils/wxMMedia2/lib/converter.def

   1 #define DEFINE_CONV(name, input_type, output_type, convert) \
   2 static void Convert_##name##(const void *buf_in, void *buf_out, wxUint32 len) \
   3 {\
   4   register input_type src; \
   5   register const input_type *t_buf_in = (input_type *)buf_in; \
   6   register output_type *t_buf_out = (output_type *)buf_out; \
   7 \
   8   while (len > 0) { \
   9     src = *t_buf_in++; \
  10     *t_buf_out++ = convert; \
  11     len -= sizeof(input_type); \
  12   } \
  13 }
  14
  15 // TODO: define converters for all other formats (32, 24)
  16
  17 DEFINE_CONV(8_8_sign, wxUint8, wxUint8, (src ^ 0x80))
  18
  19 DEFINE_CONV(8_16, wxUint8, wxUint16, (((wxUint16)src) << 8))
  20 DEFINE_CONV(8_16_swap, wxUint8, wxUint16, (src))
  21 DEFINE_CONV(8_16_sign, wxUint8, wxUint16, (((wxUint16)(src ^ 0x80)) << 8))
  22 DEFINE_CONV(8_16_sign_swap, wxUint8, wxUint16, (src ^ 0x80))
  23
  24 DEFINE_CONV(16_8, wxUint16, wxUint8, (wxUint8)(src >> 8))
  25 DEFINE_CONV(16_8_sign, wxUint16, wxUint8, (wxUint8)((src >> 8) ^ 0x80))
  26 DEFINE_CONV(16_swap_8, wxUint16, wxUint8, (wxUint8)(src & 0xff))
  27 DEFINE_CONV(16_swap_8_sign, wxUint16, wxUint8, (wxUint8)((src & 0xff) ^ 0x80))
  28
  29 //DEFINE_CONV(24_8, wxUint32, wxUint8, (wxUint8)(src >> 16))
  30 //DEFINE_CONV(24_8_sig, wxUint32, wxUint8, (wxUint8)((src >> 16) ^ 0x80))
  31
  32 //DEFINE_CONV(32_8, wxUint32, wxUint8, (wxUint8)(src >> 24))
  33
  34 DEFINE_CONV(16_sign, wxUint16, wxUint16, (src ^ 0x8000))
  35 DEFINE_CONV(16_swap, wxUint16, wxUint16, (((src & 0xff) << 8) | ((src >> 8) & 0xff)))
  36 // Problem.
  37 DEFINE_CONV(16_swap_16_sign, wxUint16, wxUint16, ((((src & 0xff) << 8) | ((src >> 8) & 0xff)) ^ 0x80))
  38 // DEFINE_CONV(16_sign_16_swap, wxUint16, wxUint16, ((((src & 0xff) << 8) | ((src >> 8) & 0xff)) ^ 0x8000))
  39 DEFINE_CONV(16_swap_16_sign_swap, wxUint16, wxUint16, (src ^ 0x80))