lib/3rdparty/libsamplerate/common.h

   1 /*
   2 ** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
   3 **
   4 ** This program is free software; you can redistribute it and/or modify
   5 ** it under the terms of the GNU General Public License as published by
   6 ** the Free Software Foundation; either version 2 of the License, or
   7 ** (at your option) any later version.
   8 **
   9 ** This program is distributed in the hope that it will be useful,
  10 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 ** GNU General Public License for more details.
  13 **
  14 ** You should have received a copy of the GNU General Public License
  15 ** along with this program; if not, write to the Free Software
  16 ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  17 */
  18
  19 /*
  20 ** This code is part of Secret Rabibt Code aka libsamplerate. A commercial
  21 ** use license for this code is available, please see:
  22 **              http://www.mega-nerd.com/SRC/procedure.html
  23 */
  24
  25 #ifndef COMMON_H_INCLUDED
  26 #define COMMON_H_INCLUDED
  27
  28 #ifdef HAVE_STDINT_H
  29 #include <stdint.h>
  30 #elif (SIZEOF_INT == 4)
  31 typedef int             int32_t ;
  32 #elif (SIZEOF_LONG == 4)
  33 typedef long    int32_t ;
  34 #endif
  35
  36 #define SRC_MAX_RATIO                   256
  37 #define SRC_MAX_RATIO_STR               "256"
  38
  39 #define SRC_MIN_RATIO_DIFF              (1e-20)
  40
  41 #define MAX(a,b)        (((a) > (b)) ? (a) : (b))
  42 #define MIN(a,b)        (((a) < (b)) ? (a) : (b))
  43
  44 #define ARRAY_LEN(x)                    ((int) (sizeof (x) / sizeof ((x) [0])))
  45 #define OFFSETOF(type,member)   ((int) (&((type*) 0)->member))
  46
  47 #define MAKE_MAGIC(a,b,c,d,e,f) ((a) + ((b) << 4) + ((c) << 8) + ((d) << 12) + ((e) << 16) + ((f) << 20))
  48
  49 #ifdef __GNUC__
  50 #       define WARN_UNUSED      __attribute__ ((warn_unused_result))
  51 #else
  52 #       define WARN_UNUSED
  53 #endif
  54
  55
  56 #include "samplerate.h"
  57
  58 enum
  59 {       SRC_FALSE       = 0,
  60         SRC_TRUE        = 1,
  61
  62         SRC_MODE_PROCESS        = 555,
  63         SRC_MODE_CALLBACK       = 556
  64 } ;
  65
  66 enum
  67 {       SRC_ERR_NO_ERROR = 0,
  68
  69         SRC_ERR_MALLOC_FAILED,
  70         SRC_ERR_BAD_STATE,
  71         SRC_ERR_BAD_DATA,
  72         SRC_ERR_BAD_DATA_PTR,
  73         SRC_ERR_NO_PRIVATE,
  74         SRC_ERR_BAD_SRC_RATIO,
  75         SRC_ERR_BAD_PROC_PTR,
  76         SRC_ERR_SHIFT_BITS,
  77         SRC_ERR_FILTER_LEN,
  78         SRC_ERR_BAD_CONVERTER,
  79         SRC_ERR_BAD_CHANNEL_COUNT,
  80         SRC_ERR_SINC_BAD_BUFFER_LEN,
  81         SRC_ERR_SIZE_INCOMPATIBILITY,
  82         SRC_ERR_BAD_PRIV_PTR,
  83         SRC_ERR_BAD_SINC_STATE,
  84         SRC_ERR_DATA_OVERLAP,
  85         SRC_ERR_BAD_CALLBACK,
  86         SRC_ERR_BAD_MODE,
  87         SRC_ERR_NULL_CALLBACK,
  88         SRC_ERR_NO_VARIABLE_RATIO,
  89         SRC_ERR_SINC_PREPARE_DATA_BAD_LEN,
  90
  91         /* This must be the last error number. */
  92         SRC_ERR_MAX_ERROR
  93 } ;
  94
  95 typedef struct SRC_PRIVATE_tag
  96 {       double  last_ratio, last_position ;
  97
  98         int             error ;
  99         int             channels ;
 100
 101         /* SRC_MODE_PROCESS or SRC_MODE_CALLBACK */
 102         int             mode ;
 103
 104         /* Pointer to data to converter specific data. */
 105         void    *private_data ;
 106
 107         /* Varispeed process function. */
 108         int             (*vari_process) (struct SRC_PRIVATE_tag *psrc, SRC_DATA *data) ;
 109
 110         /* Constant speed process function. */
 111         int             (*const_process) (struct SRC_PRIVATE_tag *psrc, SRC_DATA *data) ;
 112
 113         /* State reset. */
 114         void    (*reset) (struct SRC_PRIVATE_tag *psrc) ;
 115
 116         /* Data specific to SRC_MODE_CALLBACK. */
 117         src_callback_t  callback_func ;
 118         void                    *user_callback_data ;
 119         long                    saved_frames ;
 120         float                   *saved_data ;
 121 } SRC_PRIVATE ;
 122
 123 /* In src_sinc.c */
 124 const char* sinc_get_name (int src_enum) ;
 125 const char* sinc_get_description (int src_enum) ;
 126
 127 int sinc_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
 128
 129 /* In src_linear.c */
 130 const char* linear_get_name (int src_enum) ;
 131 const char* linear_get_description (int src_enum) ;
 132
 133 int linear_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
 134
 135 /* In src_zoh.c */
 136 const char* zoh_get_name (int src_enum) ;
 137 const char* zoh_get_description (int src_enum) ;
 138
 139 int zoh_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
 140
 141 /*----------------------------------------------------------
 142 **      Common static inline functions.
 143 */
 144
 145 static inline double
 146 fmod_one (double x)
 147 {       double res ;
 148
 149         res = x - lrint (x) ;
 150         if (res < 0.0)
 151                 return res + 1.0 ;
 152
 153         return res ;
 154 } /* fmod_one */
 155
 156 #endif  /* COMMON_H_INCLUDED */
 157