utils/wxMMedia2/lib/converter.def

   1 #define DEFINE_CONV_8(name) \
   2 static void Convert_##name##_8(const char *buf_in, char *buf_out, size_t len) \
   3 {\
   4   wxUint16 val; \
   5 \
   6   while (len > 0) { \
   7     val = *buf_in++; \
   8     len--;
   9
  10 #if SWAP_BYTES==0
  11
  12 #define DEFINE_CONV_16(name) \
  13 static void Convert_##name##_16_no(const char *buf_in, char *buf_out, size_t len) \
  14 {\
  15   wxUint16 val; \
  16 \
  17   while (len > 0) { \
  18     val = *(wxUint16 *)(buf_in); \
  19     buf_in += 2; \
  20     len -= 2;
  21
  22 #else
  23
  24 #define DEFINE_CONV_16(name) \
  25 static void Convert_##name##_16_yes(const char *buf_in, char *buf_out, size_t len) \
  26 {\
  27   wxUint16 val; \
  28 \
  29   while (len > 0) { \
  30     val = *(wxUint16 *)(buf_in); \
  31     val = wxUINT16_SWAP_ALWAYS(val); \
  32     buf_in += 2; \
  33     len -= 2;
  34
  35 #endif
  36
  37 #define END_CONV } }
  38
  39 #define PUT16 *((wxUint16 *)buf_out) = val, buf_out += 2;
  40 #define PUT16_SWAP *((wxUint16 *)buf_out) = wxUINT16_SWAP_ALWAYS(val), buf_out += 2;
  41 #define PUT8 *buf_out++ = val;
  42 #define CHANGE16_SIGN val ^= 0x8000;
  43 #define CHANGE8_SIGN val ^= 0x80;
  44 #define REDUCE16_TO_8 val /= 256;
  45 #define AUGMENT8_TO_16 val *= 256;
  46
  47 DEFINE_CONV_16(16to8)
  48 REDUCE16_TO_8
  49 PUT8
  50 END_CONV
  51
  52 DEFINE_CONV_16(16to8_U2S)
  53 CHANGE16_SIGN
  54 REDUCE16_TO_8
  55 PUT8
  56 END_CONV
  57
  58 DEFINE_CONV_16(U2S)
  59 CHANGE16_SIGN
  60 PUT16
  61 END_CONV
  62
  63 DEFINE_CONV_16(U2S_SWAP)
  64 CHANGE16_SIGN
  65 PUT16_SWAP
  66 END_CONV
  67
  68 #if SWAP_BYTES == 0
  69
  70 DEFINE_CONV_16(SWAP)
  71 PUT16_SWAP
  72 END_CONV
  73
  74 DEFINE_CONV_8(U2S)
  75 CHANGE8_SIGN
  76 PUT8
  77 END_CONV
  78
  79 DEFINE_CONV_8(8to16)
  80 AUGMENT8_TO_16
  81 PUT16
  82 END_CONV
  83
  84 DEFINE_CONV_8(8to16_SWAP)
  85 AUGMENT8_TO_16
  86 PUT16_SWAP
  87 END_CONV
  88
  89 DEFINE_CONV_8(8to16_U2S)
  90 CHANGE8_SIGN
  91 AUGMENT8_TO_16
  92 PUT16
  93 END_CONV
  94
  95 DEFINE_CONV_8(8to16_U2S_SWAP)
  96 CHANGE8_SIGN
  97 AUGMENT8_TO_16
  98 PUT16_SWAP
  99 END_CONV
 100
 101 #endif
 102
 103 #undef DEFINE_CONV_16
 104 #undef DEFINE_CONV_8
 105 #undef END_CONV
 106 #undef CHANGE16_SIGN
 107 #undef CHANGE8_SIGN
 108 #undef PUT16_SWAP
 109 #undef PUT16
 110 #undef PUT8