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examples/sndfile-info.c : Print out the BEXT time reference in a sensible format.

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This commit is contained in:
Erik de Castro Lopo 2008-05-31 17:56:19 +10:00
parent 577345d11d
commit 4d7c4616d3
1 changed files with 17 additions and 0 deletions
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17
examples/sndfile-info.c
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@ -327,6 +327,7 @@ broadcast_dump (const char *filename)
{ SNDFILE *file ;
SF_INFO sfinfo ;
SF_BROADCAST_INFO bext ;
double time_usec ;
int got_bext ;
memset (&sfinfo, 0, sizeof (sfinfo)) ;
@ -349,11 +350,27 @@ broadcast_dump (const char *filename)
return ;
} ;
/*
** From : http://www.ebu.ch/en/technical/publications/userguides/bwf_user_guide.php
**
** Time Reference:
** This field is a count from midnight in samples to the first sample
** of the audio sequence.
*/
time_usec = ((pow (2.0, 32) * bext.time_reference_high) + (1.0 * bext.time_reference_low)) / sfinfo.samplerate / 1e6 ;
printf ("Description : %.*s\n", (int) sizeof (bext.description), bext.description) ;
printf ("Originator : %.*s\n", (int) sizeof (bext.originator), bext.originator) ;
printf ("Origination ref : %.*s\n", (int) sizeof (bext.originator_reference), bext.originator_reference) ;
printf ("Origination date : %.*s\n", (int) sizeof (bext.origination_date), bext.origination_date) ;
printf ("Origination time : %.*s\n", (int) sizeof (bext.origination_time), bext.origination_time) ;
if (bext.time_reference_high == 0 && bext.time_reference_low == 0)
printf ("Time ref : 0\n") ;
else
printf ("Time ref : 0x%x%08x (%.4f microseconds)\n", bext.time_reference_high, bext.time_reference_low, time_usec) ;
printf ("BWF version : %d\n", bext.version) ;
printf ("UMID : %.*s\n", (int) sizeof (bext.umid), bext.umid) ;
printf ("Coding history : %.*s\n", bext.coding_history_size, bext.coding_history) ;