int
main (int argc, char *argv [])
{ SNDFILE *infile, *outfile = NULL ;
SF_INFO sfinfo ;
int normalize = 1 ;
sf_count_t count ;
double src_ratio = -1.0, gain = 1.0 ;
int new_sample_rate = -1, k, converter, max_speed = SF_FALSE ;
if (argc == 2 && strcmp (argv [1], "--version") == 0)
{ char buffer [64], *cptr ;
if ((cptr = strrchr (argv [0], '/')) != NULL)
argv [0] = cptr + 1 ;
if ((cptr = strrchr (argv [0], '\\')) != NULL)
argv [0] = cptr + 1 ;
sf_command (NULL, SFC_GET_LIB_VERSION, buffer, sizeof (buffer)) ;
printf ("%s (%s,%s)\n", argv [0], src_get_version (), buffer) ;
exit (0) ;
} ;
if (argc != 5 && argc != 7 && argc != 8)
usage_exit (argv [0]) ;
/* Set default converter. */
converter = DEFAULT_CONVERTER ;
for (k = 1 ; k < argc - 2 ; k++)
{ if (strcmp (argv [k], "--max-speed") == 0)
max_speed = SF_TRUE ;
else if (strcmp (argv [k], "--no-normalize") == 0)
normalize = 0 ;
else if (strcmp (argv [k], "-to") == 0)
{ k ++ ;
new_sample_rate = atoi (argv [k]) ;
}
else if (strcmp (argv [k], "-by") == 0)
{ k ++ ;
src_ratio = atof (argv [k]) ;
}
else if (strcmp (argv [k], "-c") == 0)
{ k ++ ;
converter = atoi (argv [k]) ;
}
else
usage_exit (argv [0]) ;
} ;
if (new_sample_rate <= 0 && src_ratio <= 0.0)
usage_exit (argv [0]) ;
if (src_get_name (converter) == NULL)
{ printf ("Error : bad converter number.\n") ;
usage_exit (argv [0]) ;
} ;
if (strcmp (argv [argc - 2], argv [argc - 1]) == 0)
{ printf ("Error : input and output file names are the same.\n") ;
exit (1) ;
} ;
if ((infile = sf_open (argv [argc - 2], SFM_READ, &sfinfo)) == NULL)
{ printf ("Error : Not able to open input file '%s'\n", argv [argc - 2]) ;
exit (1) ;
} ;
printf ("Input File : %s\n", argv [argc - 2]) ;
printf ("Sample Rate : %d\n", sfinfo.samplerate) ;
printf ("Input Frames : %ld\n\n", (long) sfinfo.frames) ;
if (new_sample_rate > 0)
{ src_ratio = (1.0 * new_sample_rate) / sfinfo.samplerate ;
sfinfo.samplerate = new_sample_rate ;
}
else if (src_is_valid_ratio (src_ratio))
sfinfo.samplerate = (int) floor (sfinfo.samplerate * src_ratio) ;
else
{ printf ("Not able to determine new sample rate. Exiting.\n") ;
sf_close (infile) ;
exit (1) ;
} ;
if (fabs (src_ratio - 1.0) < 1e-20)
{ printf ("Target samplerate and input samplerate are the same. Exiting.\n") ;
sf_close (infile) ;
exit (0) ;
} ;
printf ("SRC Ratio : %f\n", src_ratio) ;
printf ("Converter : %s\n\n", src_get_name (converter)) ;
if (src_is_valid_ratio (src_ratio) == 0)
{ printf ("Error : Sample rate change out of valid range.\n") ;
sf_close (infile) ;
exit (1) ;
} ;
/* Delete the output file length to zero if already exists. */
remove (argv [argc - 1]) ;
printf ("Output file : %s\n", argv [argc - 1]) ;
printf ("Sample Rate : %d\n", sfinfo.samplerate) ;
do
{ sf_close (outfile) ;
if ((outfile = sf_open (argv [argc - 1], SFM_WRITE, &sfinfo)) == NULL)
{ printf ("Error : Not able to open output file '%s'\n", argv [argc - 1]) ;
sf_close (infile) ;
exit (1) ;
} ;
if (max_speed)
{ /* This is mainly for the comparison program tests/src-evaluate.c */
sf_command (outfile, SFC_SET_ADD_PEAK_CHUNK, NULL, SF_FALSE) ;
}
else
{ /* Update the file header after every write. */
sf_command (outfile, SFC_SET_UPDATE_HEADER_AUTO, NULL, SF_TRUE) ;
} ;
sf_command (outfile, SFC_SET_CLIPPING, NULL, SF_TRUE) ;
count = sample_rate_convert (infile, outfile, converter, src_ratio, sfinfo.channels, &gain, normalize) ;
}
while (count < 0) ;
printf ("Output Frames : %ld\n\n", (long) count) ;
sf_close (infile) ;
sf_close (outfile) ;
return 0 ;
} /* main */
string Audio_file_reader::resample(int new_sample_rate) {
sf_count_t count;
string rname;
SNDFILE *sf_rs = NULL;
double gain = 1.0, src_ratio = -1.0;
int samplerate = sf_info.samplerate;
if (samplerate <= new_sample_rate) {
printf("WARNING: The original file has sampling frequency %d less than the resampled frequency %d\n", samplerate, new_sample_rate);
}
int converter = DEFAULT_CONVERTER ;
#ifdef DEBUG
printf ("Input File : %s\n", name) ;
printf ("Sample Rate : %d\n", sf_info.samplerate) ;
printf ("Input Frames : %ld\n\n", (long) sf_info.frames) ;
#endif
src_ratio = (1.0 * new_sample_rate) / samplerate;
sf_info.samplerate = new_sample_rate ;
if (fabs (src_ratio - 1.0) < 1e-20)
{
printf ("Target samplerate and input samplerate are the same. Exiting.\n") ;
return "";
}
#ifdef DEBUG
printf ("SRC Ratio : %f\n", src_ratio) ;
printf ("Converter : %s\n\n", src_get_name (converter)) ;
#endif
if (src_is_valid_ratio (src_ratio) == 0)
{
printf ("Error : Sample rate change out of valid range.\n");
return "";
}
rname = "resample_" + string(name);
remove (rname.c_str()) ;
#ifdef DEBUG
printf ("Output file : %s\n", rname.c_str());
printf ("Sample Rate : %d\n", sf_info.samplerate) ;
#endif
if (sf_rs != NULL) {
sf_close (sf_rs);
}
if ((sf_rs = sf_open(rname.c_str(), SFM_WRITE, &sf_info)) == NULL) {
printf ("Error : Not able to open output file '%s'\n", rname.c_str());
sf_close (sf);
return "";
};
/* Update the file header after every write. */
sf_command (sf_rs, SFC_SET_UPDATE_HEADER_AUTO, NULL, SF_TRUE);
sf_command (sf_rs, SFC_SET_CLIPPING, NULL, SF_TRUE) ;
count = sample_rate_convert (sf_rs, converter, src_ratio, sf_info.channels, &gain) ;
sf_close(sf_rs);
#ifdef DEBUG
printf ("Output Frames : %ld\n\n", (long) count) ;
#endif
return rname;
}
