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Aminet 8
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Aminet 8 (1995)(GTI - Schatztruhe)[!][Oct 1995].iso
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tracker_4_31.lzh
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setup_audio.c
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C/C++ Source or Header
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1995-05-11
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2KB
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105 lines
/* setup_audio.c
vi:ts=3 sw=3:
*/
/* higher level interface to the raw metal */
/* $Id: setup_audio.c,v 4.13 1995/05/11 12:26:22 espie Exp espie $
* $Log: setup_audio.c,v $
* Revision 4.13 1995/05/11 12:26:22 espie
* Corrected types.
*
* Revision 4.12 1995/02/21 21:13:16 espie
* Cleaned up source. Moved minor pieces of code around.
*
* Revision 4.11 1995/02/21 17:54:32 espie
* Internal problem: buggy RCS. Fixed logs.
*
* Revision 4.0 1994/01/11 17:55:28 espie
* Use autoinit.
* Suppressed multiple at_end.
* Use new pref scheme.
* Modified in a more consistent way.
* Added check before closing for the sgi.
* Added finetune.
*/
#include "defs.h"
#include "extern.h"
#include "tags.h"
#include "prefs.h"
ID("$Id: setup_audio.c,v 4.13 1995/05/11 12:26:22 espie Exp espie $")
LOCAL void init_audio P((void));
LOCAL void (*INIT)P((void)) = init_audio;
LOCAL int opened = FALSE;
LOCAL int ask_freq, real_freq, oversample;
LOCAL int stereo;
/* forward declaration */
LOCAL void do_close_audio P((void));
LOCAL void init_audio()
{
at_end(do_close_audio);
}
/* setup_audio(frequency, stereo, oversample):
* try to avoid calling open_audio and other things
* all the time
*/
void setup_audio(f, s, o)
int f;
int s;
int o;
{
INIT_ONCE;
if (!opened)
{
ask_freq = f;
stereo = s;
oversample = o;
real_freq = open_audio(f, s);
init_player(o, real_freq);
opened = TRUE;
}
else
{
int new_freq;
if (s != stereo || f != ask_freq)
{
ask_freq = f;
stereo = s;
close_audio();
new_freq = open_audio(f, s);
}
else
new_freq = real_freq;
if (new_freq != real_freq || oversample != o)
{
real_freq = new_freq;
oversample = o;
init_player(o, real_freq);
}
}
set_synchro(get_pref_scalar(PREF_SYNC));
}
LOCAL void do_close_audio()
{
if (opened)
{
close_audio();
}
opened = FALSE;
}