interpretor/libsndfile-1.0.25/tests/virtual_io_test.c

   1 /*
   2 ** Copyright (C) 1999-2011 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 #include "sfconfig.h"
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 #include <fcntl.h>
  25 #include <math.h>
  26 #include <string.h>
  27 #include <errno.h>
  28 #include <sys/stat.h>
  29
  30 #include <sndfile.h>
  31
  32 #include "utils.h"
  33
  34 static void vio_test (const char *fname, int format) ;
  35
  36 int
  37 main (void)
  38 {
  39         vio_test ("vio_pcm16.wav", SF_FORMAT_WAV | SF_FORMAT_PCM_16) ;
  40         vio_test ("vio_pcm24.aiff", SF_FORMAT_AIFF | SF_FORMAT_PCM_24) ;
  41         vio_test ("vio_float.au", SF_FORMAT_AU | SF_FORMAT_FLOAT) ;
  42         vio_test ("vio_pcm24.paf", SF_FORMAT_PAF | SF_FORMAT_PCM_24) ;
  43
  44         return 0 ;
  45 } /* main */
  46
  47 /*==============================================================================
  48 */
  49
  50 typedef struct
  51 {       sf_count_t offset, length ;
  52         unsigned char data [16 * 1024] ;
  53 } VIO_DATA ;
  54
  55 static sf_count_t
  56 vfget_filelen (void *user_data)
  57 {       VIO_DATA *vf = (VIO_DATA *) user_data ;
  58
  59         return vf->length ;
  60 } /* vfget_filelen */
  61
  62 static sf_count_t
  63 vfseek (sf_count_t offset, int whence, void *user_data)
  64 {       VIO_DATA *vf = (VIO_DATA *) user_data ;
  65
  66         switch (whence)
  67         {       case SEEK_SET :
  68                         vf->offset = offset ;
  69                         break ;
  70
  71                 case SEEK_CUR :
  72                         vf->offset = vf->offset + offset ;
  73                         break ;
  74
  75                 case SEEK_END :
  76                         vf->offset = vf->length + offset ;
  77                         break ;
  78                 default :
  79                         break ;
  80                 } ;
  81
  82         return vf->offset ;
  83 } /* vfseek */
  84
  85 static sf_count_t
  86 vfread (void *ptr, sf_count_t count, void *user_data)
  87 {       VIO_DATA *vf = (VIO_DATA *) user_data ;
  88
  89         /*
  90         **      This will brack badly for files over 2Gig in length, but
  91         **      is sufficient for testing.
  92         */
  93         if (vf->offset + count > vf->length)
  94                 count = vf->length - vf->offset ;
  95
  96         memcpy (ptr, vf->data + vf->offset, count) ;
  97         vf->offset += count ;
  98
  99         return count ;
 100 } /* vfread */
 101
 102 static sf_count_t
 103 vfwrite (const void *ptr, sf_count_t count, void *user_data)
 104 {       VIO_DATA *vf = (VIO_DATA *) user_data ;
 105
 106         /*
 107         **      This will break badly for files over 2Gig in length, but
 108         **      is sufficient for testing.
 109         */
 110         if (vf->offset >= SIGNED_SIZEOF (vf->data))
 111                 return 0 ;
 112
 113         if (vf->offset + count > SIGNED_SIZEOF (vf->data))
 114                 count = sizeof (vf->data) - vf->offset ;
 115
 116         memcpy (vf->data + vf->offset, ptr, (size_t) count) ;
 117         vf->offset += count ;
 118
 119         if (vf->offset > vf->length)
 120                 vf->length = vf->offset ;
 121
 122         return count ;
 123 } /* vfwrite */
 124
 125 static sf_count_t
 126 vftell (void *user_data)
 127 {       VIO_DATA *vf = (VIO_DATA *) user_data ;
 128
 129         return vf->offset ;
 130 } /* vftell */
 131
 132
 133 /*==============================================================================
 134 */
 135
 136 static void
 137 gen_short_data (short * data, int len, int start)
 138 {       int k ;
 139
 140         for (k = 0 ; k < len ; k++)
 141                 data [k] = start + k ;
 142 } /* gen_short_data */
 143
 144
 145 static void
 146 check_short_data (short * data, int len, int start, int line)
 147 {       int k ;
 148
 149         for (k = 0 ; k < len ; k++)
 150                 if (data [k] != start + k)
 151                 {       printf ("\n\nLine %d : data [%d] = %d (should be %d).\n\n", line, k, data [k], start + k) ;
 152                         exit (1) ;
 153                         } ;
 154 } /* gen_short_data */
 155
 156 /*------------------------------------------------------------------------------
 157 */
 158
 159 static void
 160 vio_test (const char *fname, int format)
 161 {       static VIO_DATA vio_data ;
 162         static short data [256] ;
 163
 164         SF_VIRTUAL_IO vio ;
 165         SNDFILE * file ;
 166         SF_INFO sfinfo ;
 167
 168         print_test_name ("virtual i/o test", fname) ;
 169
 170         /* Set up pointers to the locally defined functions. */
 171         vio.get_filelen = vfget_filelen ;
 172         vio.seek = vfseek ;
 173         vio.read = vfread ;
 174         vio.write = vfwrite ;
 175         vio.tell = vftell ;
 176
 177         /* Set virtual file offset and length to zero. */
 178         vio_data.offset = 0 ;
 179         vio_data.length = 0 ;
 180
 181         memset (&sfinfo, 0, sizeof (sfinfo)) ;
 182         sfinfo.format = format ;
 183         sfinfo.channels = 2 ;
 184         sfinfo.samplerate = 44100 ;
 185
 186         if ((file = sf_open_virtual (&vio, SFM_WRITE, &sfinfo, &vio_data)) == NULL)
 187         {       printf ("\n\nLine %d : sf_open_write failed with error : ", __LINE__) ;
 188                 fflush (stdout) ;
 189                 puts (sf_strerror (NULL)) ;
 190                 exit (1) ;
 191                 } ;
 192
 193         if (vfget_filelen (&vio_data) < 0)
 194         {       printf ("\n\nLine %d : vfget_filelen returned negative length.\n\n", __LINE__) ;
 195                 exit (1) ;
 196                 } ;
 197
 198         gen_short_data (data, ARRAY_LEN (data), 0) ;
 199         sf_write_short (file, data, ARRAY_LEN (data)) ;
 200
 201         gen_short_data (data, ARRAY_LEN (data), 1) ;
 202         sf_write_short (file, data, ARRAY_LEN (data)) ;
 203
 204         gen_short_data (data, ARRAY_LEN (data), 2) ;
 205         sf_write_short (file, data, ARRAY_LEN (data)) ;
 206
 207         sf_close (file) ;
 208
 209         /* Now test read. */
 210         memset (&sfinfo, 0, sizeof (sfinfo)) ;
 211
 212         vio_data.offset = 0 ;
 213
 214         if ((file = sf_open_virtual (&vio, SFM_READ, &sfinfo, &vio_data)) == NULL)
 215         {       printf ("\n\nLine %d : sf_open_write failed with error : ", __LINE__) ;
 216                 fflush (stdout) ;
 217                 puts (sf_strerror (NULL)) ;
 218
 219                 dump_data_to_file (fname, vio_data.data, vio_data.length) ;
 220                 exit (1) ;
 221                 } ;
 222
 223
 224         sf_read_short (file, data, ARRAY_LEN (data)) ;
 225         check_short_data (data, ARRAY_LEN (data), 0, __LINE__) ;
 226
 227         sf_read_short (file, data, ARRAY_LEN (data)) ;
 228         check_short_data (data, ARRAY_LEN (data), 1, __LINE__) ;
 229
 230         sf_read_short (file, data, ARRAY_LEN (data)) ;
 231         check_short_data (data, ARRAY_LEN (data), 2, __LINE__) ;
 232
 233         sf_close (file) ;
 234
 235         puts ("ok") ;
 236 } /* vio_test */
 237