code.delx.au - pulseaudio/blob - src/pulsecore/endianmacros.h

   1 #ifndef fooendianmacroshfoo
   2 #define fooendianmacroshfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2004-2006 Lennart Poettering
   8   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   9
  10   PulseAudio is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU Lesser General Public License as published
  12   by the Free Software Foundation; either version 2 of the License,
  13   or (at your option) any later version.
  14
  15   PulseAudio is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with PulseAudio; if not, write to the Free Software
  22   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23   USA.
  24 ***/
  25
  26 #include <inttypes.h>
  27
  28 #ifndef PACKAGE
  29 #error "Please include config.h before including this file!"
  30 #endif
  31
  32 #ifdef HAVE_BYTESWAP_H
  33 #include <byteswap.h>
  34 #endif
  35
  36 #ifdef HAVE_BYTESWAP_H
  37 #define PA_INT16_SWAP(x) ((int16_t) bswap_16((uint16_t) x))
  38 #define PA_UINT16_SWAP(x) ((uint16_t) bswap_16((uint16_t) x))
  39 #define PA_INT32_SWAP(x) ((int32_t) bswap_32((uint32_t) x))
  40 #define PA_UINT32_SWAP(x) ((uint32_t) bswap_32((uint32_t) x))
  41 #else
  42 #define PA_INT16_SWAP(x) ( (int16_t) ( ((uint16_t) x >> 8) | ((uint16_t) x << 8) ) )
  43 #define PA_UINT16_SWAP(x) ( (uint16_t) ( ((uint16_t) x >> 8) | ((uint16_t) x << 8) ) )
  44 #define PA_INT32_SWAP(x) ( (int32_t) ( ((uint32_t) x >> 24) | ((uint32_t) x << 24) | (((uint32_t) x & 0xFF00) << 8) | ((((uint32_t) x) >> 8) & 0xFF00) ) )
  45 #define PA_UINT32_SWAP(x) ( (uint32_t) ( ((uint32_t) x >> 24) | ((uint32_t) x << 24) | (((uint32_t) x & 0xFF00) << 8) | ((((uint32_t) x) >> 8) & 0xFF00) ) )
  46 #endif
  47
  48 static inline float PA_FLOAT32_SWAP(float x) {
  49     union {
  50         float f;
  51         uint32_t u;
  52     } t;
  53
  54     t.f = x;
  55     t.u = PA_UINT32_SWAP(t.u);
  56     return t.f;
  57 }
  58
  59 #define PA_MAYBE_INT16_SWAP(c,x) ((c) ? PA_INT32_SWAP(x) : x)
  60 #define PA_MAYBE_UINT16_SWAP(c,x) ((c) ? PA_UINT32_SWAP(x) : x)
  61
  62 #define PA_MAYBE_INT32_SWAP(c,x) ((c) ? PA_INT32_SWAP(x) : x)
  63 #define PA_MAYBE_UINT32_SWAP(c,x) ((c) ? PA_UINT32_SWAP(x) : x)
  64
  65 #define PA_MAYBE_FLOAT32_SWAP(c,x) ((c) ? PA_FLOAT32_SWAP(x) : x)
  66
  67 #ifdef WORDS_BIGENDIAN
  68  #define PA_INT16_FROM_LE(x) PA_INT16_SWAP(x)
  69  #define PA_INT16_FROM_BE(x) ((int16_t)(x))
  70
  71  #define PA_INT16_TO_LE(x) PA_INT16_SWAP(x)
  72  #define PA_INT16_TO_BE(x) ((int16_t)(x))
  73
  74  #define PA_UINT16_FROM_LE(x) PA_UINT16_SWAP(x)
  75  #define PA_UINT16_FROM_BE(x) ((uint16_t)(x))
  76
  77  #define PA_UINT16_TO_LE(x) PA_UINT16_SWAP(x)
  78  #define PA_UINT16_TO_BE(x) ((uint16_t)(x))
  79
  80  #define PA_INT32_FROM_LE(x) PA_INT32_SWAP(x)
  81  #define PA_INT32_FROM_BE(x) ((int32_t)(x))
  82
  83  #define PA_INT32_TO_LE(x) PA_INT32_SWAP(x)
  84  #define PA_INT32_TO_BE(x) ((int32_t)(x))
  85
  86  #define PA_UINT32_FROM_LE(x) PA_UINT32_SWAP(x)
  87  #define PA_UINT32_FROM_BE(x) ((uint32_t)(x))
  88
  89  #define PA_UINT32_TO_LE(x) PA_UINT32_SWAP(x)
  90  #define PA_UINT32_TO_BE(x) ((uint32_t)(x))
  91
  92  #define PA_FLOAT32_TO_LE(x) PA_FLOAT32_SWAP(x)
  93  #define PA_FLOAT32_TO_BE(x) ((float) (x))
  94 #else
  95  #define PA_INT16_FROM_LE(x) ((int16_t)(x))
  96  #define PA_INT16_FROM_BE(x) PA_INT16_SWAP(x)
  97
  98  #define PA_INT16_TO_LE(x) ((int16_t)(x))
  99  #define PA_INT16_TO_BE(x) PA_INT16_SWAP(x)
 100
 101  #define PA_UINT16_FROM_LE(x) ((uint16_t)(x))
 102  #define PA_UINT16_FROM_BE(x) PA_UINT16_SWAP(x)
 103
 104  #define PA_UINT16_TO_LE(x) ((uint16_t)(x))
 105  #define PA_UINT16_TO_BE(x) PA_UINT16_SWAP(x)
 106
 107  #define PA_INT32_FROM_LE(x) ((int32_t)(x))
 108  #define PA_INT32_FROM_BE(x) PA_INT32_SWAP(x)
 109
 110  #define PA_INT32_TO_LE(x) ((int32_t)(x))
 111  #define PA_INT32_TO_BE(x) PA_INT32_SWAP(x)
 112
 113  #define PA_UINT32_FROM_LE(x) ((uint32_t)(x))
 114  #define PA_UINT32_FROM_BE(x) PA_UINT32_SWAP(x)
 115
 116  #define PA_UINT32_TO_LE(x) ((uint32_t)(x))
 117  #define PA_UINT32_TO_BE(x) PA_UINT32_SWAP(x)
 118
 119  #define PA_FLOAT32_TO_LE(x) ((float) (x))
 120  #define PA_FLOAT32_TO_BE(x) PA_FLOAT32_SWAP(x)
 121 #endif
 122
 123 #endif