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programs/sndfile-info.c : Simplify get_signal_max using SFC_CALC_SIGNAL_MAX command. Increase size of files for which signal max will be calculated.

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This commit is contained in:
Erik de Castro Lopo 2009-02-03 10:52:13 +11:00
parent 0f49287a58
commit 134cd50cae
2 changed files with 7 additions and 16 deletions
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4
ChangeLog
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@ -3,6 +3,10 @@
* programs/sndfile-convert.c
Add 'htk' to the list of convert formats.
* programs/sndfile-info.c
Simplify get_signal_max using SFC_CALC_SIGNAL_MAX command.
Increase size of files for which signal max will be calculated.
2009-01-14 Erik de Castro Lopo <erikd AT mega-nerd DOT com>
* doc/index.html

19
programs/sndfile-info.c
View File

@ -145,22 +145,9 @@ static double data [BUFFER_LEN] ;
static double
get_signal_max (SNDFILE *file)
{ double max, temp ;
int readcount, k, save_state ;
{ double max ;
save_state = sf_command (file, SFC_GET_NORM_DOUBLE, NULL, 0) ;
sf_command (file, SFC_SET_NORM_DOUBLE, NULL, SF_FALSE) ;
max = 0.0 ;
while ((readcount = sf_read_double (file, data, BUFFER_LEN)))
{ for (k = 0 ; k < readcount ; k++)
{ temp = fabs (data [k]) ;
if (temp > max)
max = temp ;
} ;
} ;
sf_command (file, SFC_SET_NORM_DOUBLE, NULL, save_state) ;
sf_command (file, SFC_CALC_SIGNAL_MAX, &max, sizeof (max)) ;
return max ;
} /* get_signal_max */
@ -275,7 +262,7 @@ info_dump (const char *filename)
printf ("Seekable : %s\n", (sfinfo.seekable ? "TRUE" : "FALSE")) ;
printf ("Duration : %s\n", generate_duration_str (&sfinfo)) ;
if (sfinfo.frames < 10 * 1024 * 1024)
if (sfinfo.frames < 100 * 1024 * 1024)
{ /* Do not use sf_signal_max because it doesn't work for non-seekable files . */
signal_max = get_signal_max (file) ;
decibels = calc_decibels (&sfinfo, signal_max) ;