278 lines
7.1 KiB
C
278 lines
7.1 KiB
C
/*
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** Copyright (C) 2010-2014 Erik de Castro Lopo <erikd@mega-nerd.com>
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**
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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**
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the author nor the names of any contributors may be used
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** to endorse or promote products derived from this software without
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** specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <ctype.h>
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#include <math.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sndfile.h>
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#include "common.h"
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#define BUFFER_LEN (1 << 16)
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#define NOT(x) (! (x))
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static void usage_exit (const char *progname) ;
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static void salvage_file (const char * broken_wav, const char * fixed_w64) ;
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int
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main (int argc, char *argv [])
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{
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if (argc != 3)
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usage_exit (program_name (argv [0])) ;
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salvage_file (argv [1], argv [2]) ;
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return 0 ;
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} /* main */
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/*==============================================================================
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*/
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static void lseek_or_die (int fd, off_t offset, int whence) ;
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static sf_count_t get_file_length (int fd, const char * name) ;
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static sf_count_t find_data_offset (int fd, int format) ;
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static void copy_data (int fd, SNDFILE * sndfile, int readsize) ;
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static void
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usage_exit (const char *progname)
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{ printf ("Usage :\n\n %s <broken wav file> <fixed w64 file>\n\n", progname) ;
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puts ("Salvages the audio data from WAV files which are more than 4G in length.\n") ;
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printf ("Using %s.\n\n", sf_version_string ()) ;
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exit (1) ;
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} /* usage_exit */
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static void
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salvage_file (const char * broken_wav, const char * fixed_w64)
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{ SNDFILE * sndfile ;
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SF_INFO sfinfo ;
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sf_count_t broken_len, data_offset ;
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int fd, read_size ;
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if (strcmp (broken_wav, fixed_w64) == 0)
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{ printf ("Error : Input and output files must be different.\n\n") ;
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exit (1) ;
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} ;
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if ((fd = open (broken_wav, O_RDONLY)) < 0)
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{ printf ("Error : Not able to open file '%s' : %s\n", broken_wav, strerror (errno)) ;
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exit (1) ;
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} ;
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broken_len = get_file_length (fd, broken_wav) ;
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if (broken_len <= 0xffffffff)
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printf ("File is not greater than 4Gig but salvaging anyway.\n") ;
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/* Grab the format info from the broken file. */
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memset (&sfinfo, 0, sizeof (sfinfo)) ;
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if ((sndfile = sf_open (broken_wav, SFM_READ, &sfinfo)) == NULL)
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{ printf ("sf_open ('%s') failed : %s\n", broken_wav, sf_strerror (NULL)) ;
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exit (1) ;
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} ;
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sf_close (sndfile) ;
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data_offset = find_data_offset (fd, sfinfo.format & SF_FORMAT_TYPEMASK) ;
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printf ("Offset to audio data : %" PRId64 "\n", data_offset) ;
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switch (sfinfo.format & SF_FORMAT_TYPEMASK)
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{ case SF_FORMAT_WAV :
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case SF_FORMAT_WAVEX :
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sfinfo.format = SF_FORMAT_W64 | (sfinfo.format & SF_FORMAT_SUBMASK) ;
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break ;
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default :
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printf ("Don't currently support this file type.\n") ;
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exit (1) ;
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} ;
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switch (sfinfo.format & SF_FORMAT_SUBMASK)
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{ case SF_FORMAT_PCM_U8 :
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case SF_FORMAT_PCM_S8 :
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read_size = 1 ;
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break ;
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case SF_FORMAT_PCM_16 :
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read_size = 2 ;
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break ;
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case SF_FORMAT_PCM_24 :
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read_size = 3 ;
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break ;
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case SF_FORMAT_PCM_32 :
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case SF_FORMAT_FLOAT :
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read_size = 4 ;
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break ;
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case SF_FORMAT_DOUBLE :
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read_size = 8 ;
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break ;
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default :
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printf ("Sorry, don't currently support this file encoding type.\n") ;
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exit (1) ;
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} ;
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read_size *= sfinfo.channels ;
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if ((sndfile = sf_open (fixed_w64, SFM_WRITE, &sfinfo)) == NULL)
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{ printf ("sf_open ('%s') failed : %s\n", broken_wav, sf_strerror (NULL)) ;
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exit (1) ;
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} ;
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lseek_or_die (fd, data_offset, SEEK_SET) ;
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copy_data (fd, sndfile, read_size) ;
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sf_close (sndfile) ;
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puts ("Done!") ;
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} /* salvage_file */
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/*------------------------------------------------------------------------------
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*/
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static void
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lseek_or_die (int fd, off_t offset, int whence)
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{
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if (lseek (fd, offset, whence) < 0)
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{ printf ("lseek failed : %s\n", strerror (errno)) ;
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exit (1) ;
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} ;
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return ;
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} /* lseek_or_die */
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static sf_count_t
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get_file_length (int fd, const char * name)
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{ struct stat sbuf ;
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if (sizeof (sbuf.st_size) != 8)
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{ puts ("Error : sizeof (sbuf.st_size) != 8. Was program compiled with\n"
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" 64 bit file offsets?\n") ;
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exit (1) ;
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} ;
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if (fstat (fd, &sbuf) != 0)
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{ printf ("Error : fstat ('%s') failed : %s\n", name, strerror (errno)) ;
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exit (1) ;
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} ;
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return sbuf.st_size ;
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} /* get_file_length */
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static sf_count_t
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find_data_offset (int fd, int format)
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{ char buffer [8192], *cptr ;
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const char * target = "XXXX" ;
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sf_count_t offset = -1, extra ;
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int rlen, slen ;
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switch (format)
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{ case SF_FORMAT_WAV :
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case SF_FORMAT_WAVEX :
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target = "data" ;
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extra = 8 ;
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break ;
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case SF_FORMAT_AIFF :
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target = "SSND" ;
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extra = 16 ;
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break ;
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default :
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puts ("Error : Sorry, don't handle this input file format.\n") ;
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exit (1) ;
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} ;
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slen = strlen (target) ;
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lseek_or_die (fd, 0, SEEK_SET) ;
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printf ("Searching for '%s' maker.\n", target) ;
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if ((rlen = read (fd, buffer, sizeof (buffer))) < 0)
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{ printf ("Error : failed read : %s\n", strerror (errno)) ;
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exit (1) ;
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} ;
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cptr = memchr (buffer, target [0], rlen - slen) ;
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if (cptr && memcmp (cptr, target, slen) == 0)
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offset = cptr - buffer ;
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else
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{ printf ("Error : Could not find data offset.\n") ;
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exit (1) ;
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} ;
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return offset + extra ;
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} /* find_data_offset */
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static void
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copy_data (int fd, SNDFILE * sndfile, int readsize)
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{ static char * buffer ;
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sf_count_t readlen, count ;
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int bufferlen, done = 0 ;
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bufferlen = readsize * 1024 ;
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buffer = malloc (bufferlen) ;
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while (NOT (done) && (readlen = read (fd, buffer, bufferlen)) >= 0)
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{ if (readlen < bufferlen)
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{ readlen -= readlen % readsize ;
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done = 1 ;
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} ;
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if ((count = sf_write_raw (sndfile, buffer, readlen)) != readlen)
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{ printf ("Error : sf_write_raw returned %" PRId64 " : %s\n", count, sf_strerror (sndfile)) ;
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return ;
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} ;
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} ;
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free (buffer) ;
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return ;
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} /* copy_data */
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