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/* gap_timeconv.c
*
* This module handles conversions framenumber/Rate --> timestring (mm:ss:msec)
*/
/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* revision history:
* version 1.3.19a; 2003/09/06 hof: added more converter procedures for audio
* version 1.3.14c; 2003/06/14 hof: created
*/
#include "config.h"
#include <stdio.h>
#include "libgimp/gimp.h"
#include "gap_timeconv.h"
#include "gap-intl.h"
/* -------------------------------
* gap_timeconv_msecs_to_timestr
* -------------------------------
* convert Input milliseconds value
* into time string formated as mm:ss:msec
* (minutes:seconds:milliseconds)
*
* the caller must provide a pointer to txt buffer
* where the output is written into at txt_size.
*
* the txt buffer size should be at last 12 bytes
*/
void
gap_timeconv_msecs_to_timestr(gint32 tmsec, gchar *txt, gint txt_size)
{
gint32 tms;
gint32 tsec;
gint32 tmin;
tms = tmsec % 1000;
tsec = (tmsec / 1000) % 60;
tmin = tmsec / 60000;
g_snprintf(txt, txt_size,"%02d:%02d:%03d"
, (int)tmin, (int)tsec, (int)tms);
} /* end gap_timeconv_msecs_to_timestr */
/* -------------------------------
* gap_timeconv_framenr_to_timestr
* -------------------------------
* convert Input framenumber and framerate unit frames/sec)
* into time string formated as mm:ss:msec
* (minutes:seconds:milliseconds)
*
* the caller must provide a pointer to txt buffer
* where the output is written into at txt_size.
*
* the txt buffer size should be at last 12 bytes
*/
void
gap_timeconv_framenr_to_timestr( gint32 framenr, gdouble framerate, gchar *txt, gint txt_size)
{
gdouble msec_per_frame;
gint32 tmsec;
if(framerate > 0)
{
msec_per_frame = 1000.0 / framerate;
}
else
{
msec_per_frame = 1000.0;
}
if(framenr >= 0)
{
tmsec = framenr * msec_per_frame;
gap_timeconv_msecs_to_timestr (tmsec, txt, txt_size);
}
else
{ g_snprintf(txt, txt_size, "??:??:???");
}
} /* end gap_timeconv_framenr_to_timestr */
/* -------------------------------
* gap_timeconv_samples_to_timestr
* -------------------------------
* convert Input samples at given samplerate (unit is samples/sec)
* into time string formated as mm:ss:msec
* (minutes:seconds:milliseconds)
*
* the caller must provide a pointer to txt buffer
* where the output is written into at txt_size.
*
* the txt buffer size should be at last 12 bytes
*/
void
gap_timeconv_samples_to_timestr( gint32 samples, gdouble samplerate, gchar *txt, gint txt_size)
{
gdouble tmsec;
if(samplerate > 0)
{
tmsec = (1000.0 * (gdouble)samples) / samplerate;
}
else
{
tmsec = (1000.0 * (gdouble)samples) / 44100;
}
gap_timeconv_msecs_to_timestr ((gint32)tmsec, txt, txt_size);
} /* end gap_timeconv_samples_to_timestr */
/* -------------------------------
* gap_timeconv_samples_to_frames
* -------------------------------
* convert Input samples at given samplerate (unit is samples/sec)
* and given framerate unit frames/sec)
* to audioframes. (== number of frames that have to be played at framerate
* to get the same duration as samples played at samplerate)
* returns the number of audioframes
*/
gdouble
gap_timeconv_samples_to_frames( gint32 samples, gdouble samplerate, gdouble framerate)
{
gdouble secs;
gdouble frames;
if((samplerate < 1) || (framerate < 1))
{
return (0);
}
secs = (gdouble)samples / samplerate;
frames = secs * framerate;
return(frames);
} /* end gap_timeconv_samples_to_frames */
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