sndfile-cmp.c
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上传日期:2022-01-05
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- /*
- ** Copyright (C) 2008-2009 Erik de Castro Lopo <erikd@mega-nerd.com>
- **
- ** All rights reserved.
- **
- ** Redistribution and use in source and binary forms, with or without
- ** modification, are permitted provided that the following conditions are
- ** met:
- **
- ** * Redistributions of source code must retain the above copyright
- ** notice, this list of conditions and the following disclaimer.
- ** * Redistributions in binary form must reproduce the above copyright
- ** notice, this list of conditions and the following disclaimer in
- ** the documentation and/or other materials provided with the
- ** distribution.
- ** * Neither the author nor the names of any contributors may be used
- ** to endorse or promote products derived from this software without
- ** specific prior written permission.
- **
- ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- ** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- ** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- ** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- ** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- ** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- ** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- ** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- /* sndfile-cmp.c
- * Conrad Parker 2008
- */
- #include "sfconfig.h"
- #include <stdio.h>
- #include <string.h>
- #include <sndfile.h>
- /* Length of comparison data buffers in units of items */
- #define BUFLEN 65536
- static char * progname ;
- static char * filename1, * filename2 ;
- static int
- comparison_error (const char * what)
- { printf ("%s: %s of files %s and %s differn", progname, what, filename1, filename2) ;
- return 1 ;
- } /* comparison_error */
- static int
- compare (void)
- {
- double buf1 [BUFLEN], buf2 [BUFLEN] ;
- SF_INFO sfinfo1, sfinfo2 ;
- SNDFILE * sf1 = NULL, * sf2 = NULL ;
- sf_count_t len, i, nread1, nread2 ;
- int retval = 0 ;
- memset (&sfinfo1, 0, sizeof (SF_INFO)) ;
- sf1 = sf_open (filename1, SFM_READ, &sfinfo1) ;
- if (sf1 == NULL)
- { printf ("Error opening %s.n", filename1) ;
- retval = 1 ;
- goto out ;
- } ;
- memset (&sfinfo2, 0, sizeof (SF_INFO)) ;
- sf2 = sf_open (filename2, SFM_READ, &sfinfo2) ;
- if (sf2 == NULL)
- { printf ("Error opening %s.n", filename2) ;
- retval = 1 ;
- goto out ;
- } ;
- if (sfinfo1.samplerate != sfinfo2.samplerate)
- { retval = comparison_error ("Samplerates") ;
- goto out ;
- } ;
- if (sfinfo1.channels != sfinfo2.channels)
- { retval = comparison_error ("Number of channels") ;
- goto out ;
- } ;
- /* Calculate the framecount that will fit in our data buffers */
- len = BUFLEN / sfinfo1.channels ;
- while ( (nread1 = sf_readf_double (sf1, buf1, len)) > 0)
- { nread2 = sf_readf_double (sf2, buf2, nread1) ;
- if (nread2 != nread1)
- { retval = comparison_error ("PCM data lengths") ;
- goto out ;
- } ;
- for (i = 0 ; i < nread1 ; i++)
- { if (buf1 [i] != buf2 [i])
- { retval = comparison_error ("PCM data") ;
- goto out ;
- } ;
- } ;
- } ;
- if ( (nread2 = sf_readf_double (sf2, buf2, nread1)) != 0)
- { retval = comparison_error ("PCM data lengths") ;
- goto out ;
- } ;
- out :
- sf_close (sf1) ;
- sf_close (sf2) ;
- return retval ;
- } /* compare */
- static void
- print_version (void)
- { char buffer [256] ;
- sf_command (NULL, SFC_GET_LIB_VERSION, buffer, sizeof (buffer)) ;
- printf ("nVersion : %snn", buffer) ;
- } /* print_version */
- static void
- print_usage (void)
- {
- print_version () ;
- printf ("Usage : %s <filename> <filename>n", progname) ;
- printf (" Compare the PCM data of two sound files.nn") ;
- } /* print_usage */
- int
- main (int argc, char *argv [])
- {
- progname = strrchr (argv [0], '/') ;
- progname = progname ? progname + 1 : argv [0] ;
- if (argc != 3)
- { print_usage () ;
- return 1 ;
- } ;
- filename1 = argv [argc - 2] ;
- filename2 = argv [argc - 1] ;
- if (strcmp (filename1, filename2) == 0)
- { printf ("Error : Input filenames are the same.nn") ;
- print_usage () ;
- return 1 ;
- } ;
- return compare () ;
- } /* main */