interpretor/libsndfile-1.0.25/programs/sndfile-salvage.c

   1 /*
   2 ** Copyright (C) 2010-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
   3 **
   4 ** All rights reserved.
   5 **
   6 ** Redistribution and use in source and binary forms, with or without
   7 ** modification, are permitted provided that the following conditions are
   8 ** met:
   9 **
  10 **     * Redistributions of source code must retain the above copyright
  11 **       notice, this list of conditions and the following disclaimer.
  12 **     * Redistributions in binary form must reproduce the above copyright
  13 **       notice, this list of conditions and the following disclaimer in
  14 **       the documentation and/or other materials provided with the
  15 **       distribution.
  16 **     * Neither the author nor the names of any contributors may be used
  17 **       to endorse or promote products derived from this software without
  18 **       specific prior written permission.
  19 **
  20 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22 ** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23 ** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  24 ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25 ** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26 ** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  27 ** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  28 ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  29 ** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  30 ** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31 */
  32
  33 #include        <stdio.h>
  34 #include        <stdlib.h>
  35 #include        <string.h>
  36 #include        <inttypes.h>
  37 #include        <ctype.h>
  38 #include        <math.h>
  39 #include        <errno.h>
  40 #include        <unistd.h>
  41 #include        <fcntl.h>
  42 #include        <sys/stat.h>
  43 #include        <sys/types.h>
  44
  45 #include        <sndfile.h>
  46
  47 #include        "common.h"
  48
  49 #define BUFFER_LEN              (1 << 16)
  50
  51 #define NOT(x)                  (! (x))
  52
  53
  54 static void usage_exit (const char *progname) ;
  55 static void salvage_file (const char * broken_wav, const char * fixed_w64) ;
  56
  57 int
  58 main (int argc, char *argv [])
  59 {
  60         if (argc != 3)
  61                 usage_exit (program_name (argv [0])) ;
  62
  63         salvage_file (argv [1], argv [2]) ;
  64
  65         return 0 ;
  66 } /* main */
  67
  68 /*==============================================================================
  69 */
  70
  71 static void lseek_or_die (int fd, off_t offset, int whence) ;
  72 static sf_count_t get_file_length (int fd, const char * name) ;
  73 static sf_count_t find_data_offset (int fd, int format) ;
  74 static void copy_data (int fd, SNDFILE * sndfile, int readsize) ;
  75
  76
  77 static void
  78 usage_exit (const char *progname)
  79 {       printf ("Usage :\n\n  %s <broken wav file> <fixed w64 file>\n\n", progname) ;
  80         puts ("Salvages the audio data from WAV files which are more than 4G in length.\n") ;
  81         printf ("Using %s.\n\n", sf_version_string ()) ;
  82         exit (0) ;
  83 } /* usage_exit */
  84
  85 static void
  86 salvage_file (const char * broken_wav, const char * fixed_w64)
  87 {       SNDFILE * sndfile ;
  88         SF_INFO sfinfo ;
  89         sf_count_t broken_len, data_offset ;
  90         int fd, read_size ;
  91
  92         if (strcmp (broken_wav, fixed_w64) == 0)
  93         {       printf ("Error : Input and output files must be different.\n\n") ;
  94                 exit (1) ;
  95                 } ;
  96
  97         if ((fd = open (broken_wav, O_RDONLY)) < 0)
  98         {       printf ("Error : Not able to open file '%s' : %s\n", broken_wav, strerror (errno)) ;
  99                 exit (1) ;
 100                 } ;
 101
 102         broken_len = get_file_length (fd, broken_wav) ;
 103         if (broken_len <= 0xffffffff)
 104                 printf ("File is not greater than 4Gig but salvaging anyway.\n") ;
 105
 106         /* Grab the format info from the broken file. */
 107         memset (&sfinfo, 0, sizeof (sfinfo)) ;
 108         if ((sndfile = sf_open (broken_wav, SFM_READ, &sfinfo)) == NULL)
 109         {       printf ("sf_open ('%s') failed : %s\n", broken_wav, sf_strerror (NULL)) ;
 110                 exit (1) ;
 111                 } ;
 112         sf_close (sndfile) ;
 113
 114         data_offset = find_data_offset (fd, sfinfo.format & SF_FORMAT_TYPEMASK) ;
 115
 116         printf ("Offset to audio data : %" PRId64 "\n", data_offset) ;
 117
 118         switch (sfinfo.format & SF_FORMAT_TYPEMASK)
 119         {       case SF_FORMAT_WAV :
 120                 case SF_FORMAT_WAVEX :
 121                         sfinfo.format = SF_FORMAT_W64 | (sfinfo.format & SF_FORMAT_SUBMASK) ;
 122                         break ;
 123
 124                 default :
 125                         printf ("Don't currently support this file type.\n") ;
 126                         exit (1) ;
 127                 } ;
 128
 129         switch (sfinfo.format & SF_FORMAT_SUBMASK)
 130         {       case SF_FORMAT_PCM_U8 :
 131                 case SF_FORMAT_PCM_S8 :
 132                                 read_size = 1 ;
 133                                 break ;
 134
 135                 case SF_FORMAT_PCM_16 :
 136                                 read_size = 2 ;
 137                                 break ;
 138
 139                 case SF_FORMAT_PCM_24 :
 140                                 read_size = 3 ;
 141                                 break ;
 142
 143                 case SF_FORMAT_PCM_32 :
 144                 case SF_FORMAT_FLOAT :
 145                                 read_size = 4 ;
 146                                 break ;
 147
 148                 case SF_FORMAT_DOUBLE :
 149                                 read_size = 8 ;
 150                                 break ;
 151
 152                 default :
 153                         printf ("Sorry, don't currently support this file encoding type.\n") ;
 154                         exit (1) ;
 155                 } ;
 156
 157         read_size *= sfinfo.channels ;
 158
 159         if ((sndfile = sf_open (fixed_w64, SFM_WRITE, &sfinfo)) == NULL)
 160         {       printf ("sf_open ('%s') failed : %s\n", broken_wav, sf_strerror (NULL)) ;
 161                 exit (1) ;
 162                 } ;
 163
 164         lseek_or_die (fd, data_offset, SEEK_SET) ;
 165
 166         copy_data (fd, sndfile, read_size) ;
 167
 168         sf_close (sndfile) ;
 169
 170         puts ("Done!") ;
 171 } /* salvage_file */
 172
 173 /*------------------------------------------------------------------------------
 174 */
 175
 176 static void
 177 lseek_or_die (int fd, off_t offset, int whence)
 178 {
 179         if (lseek (fd, offset, whence) < 0)
 180         {       printf ("lseek failed : %s\n", strerror (errno)) ;
 181                 exit (1) ;
 182                 } ;
 183
 184         return ;
 185 } /* lseek_or_die */
 186
 187
 188 static sf_count_t
 189 get_file_length (int fd, const char * name)
 190 {       struct stat sbuf ;
 191
 192         if (sizeof (sbuf.st_size) != 8)
 193         {       puts ("Error : sizeof (sbuf.st_size) != 8. Was program compiled with\n"
 194                                 "        64 bit file offsets?\n") ;
 195                 exit (1) ;
 196                 } ;
 197
 198         if (fstat (fd, &sbuf) != 0)
 199         {       printf ("Error : fstat ('%s') failed : %s\n", name, strerror (errno)) ;
 200                 exit (1) ;
 201                 } ;
 202
 203         return sbuf.st_size ;
 204 } /* get_file_length */
 205
 206 static sf_count_t
 207 find_data_offset (int fd, int format)
 208 {       char buffer [8192], *cptr ;
 209         const char * target = "XXXX" ;
 210         sf_count_t offset = -1, extra ;
 211         int rlen, slen ;
 212
 213         switch (format)
 214         {       case SF_FORMAT_WAV :
 215                 case SF_FORMAT_WAVEX :
 216                         target = "data" ;
 217                         extra = 8 ;
 218                         break ;
 219
 220                 case SF_FORMAT_AIFF :
 221                         target = "SSND" ;
 222                         extra = 16 ;
 223                         break ;
 224
 225                 default :
 226                         puts ("Error : Sorry, don't handle this input file format.\n") ;
 227                         exit (1) ;
 228                 } ;
 229
 230         slen = strlen (target) ;
 231
 232         lseek_or_die (fd, 0, SEEK_SET) ;
 233
 234         printf ("Searching for '%s' maker.\n", target) ;
 235
 236         if ((rlen = read (fd, buffer, sizeof (buffer))) < 0)
 237         {       printf ("Error : failed read : %s\n", strerror (errno)) ;
 238                 exit (1) ;
 239                 } ;
 240
 241         cptr = memchr (buffer, target [0], rlen - slen) ;
 242         if (cptr && memcmp (cptr, target, slen) == 0)
 243                 offset = cptr - buffer  ;
 244         else
 245         {       printf ("Error : Could not find data offset.\n") ;
 246                 exit (1) ;
 247                 } ;
 248
 249         return offset + extra ;
 250 } /* find_data_offset */
 251
 252 static void
 253 copy_data (int fd, SNDFILE * sndfile, int readsize)
 254 {       static char * buffer ;
 255         sf_count_t readlen, count ;
 256         int bufferlen, done = 0 ;
 257
 258         bufferlen = readsize * 1024 ;
 259         buffer = malloc (bufferlen) ;
 260
 261         while (NOT (done) && (readlen = read (fd, buffer, bufferlen)) >= 0)
 262         {       if (readlen < bufferlen)
 263                 {       readlen -= readlen % readsize ;
 264                         done = 1 ;
 265                         } ;
 266
 267                 if ((count = sf_write_raw (sndfile, buffer, readlen)) != readlen)
 268                 {       printf ("Error : sf_write_raw returned %" PRId64 " : %s\n", count, sf_strerror (sndfile)) ;
 269                         return ;
 270                         } ;
 271                 } ;
 272
 273         free (buffer) ;
 274
 275         return ;
 276 } /* copy_data */
 277