Initial revision.

1998-07-16 17:48:11 +00:00
parent 1175179da1
commit fca7a8fa47
22 changed files with 3172 additions and 0 deletions
--- a/example/example.cxx
+++ b/example/example.cxx
@@ -0,0 +1,89 @@
+
+
+#include "sl.h"
+#include "sm.h"
+#include <math.h>
+
+/*
+  Construct a sound scheduler and a mixer.
+*/
+
+slScheduler sched ( 8000 ) ;
+smMixer mixer ;
+
+int main ()
+{
+  mixer . setMasterVolume ( 30 ) ;
+  sched . setSafetyMargin ( 0.128 ) ;
+
+  /* Just for fun, let's make a one second synthetic engine sample... */
+
+  Uchar buffer [ 8000 ] ;
+
+  for ( int i = 0 ; i < 8000 ; i++ )
+  {
+    /* Sum some sin waves and convert to range 0..1 */
+
+    float level = ( sin ( (double) i * 2.0 * M_PI / (8000.0/ 50.0) ) +
+                    sin ( (double) i * 2.0 * M_PI / (8000.0/149.0) ) +
+                    sin ( (double) i * 2.0 * M_PI / (8000.0/152.0) ) +
+                    sin ( (double) i * 2.0 * M_PI / (8000.0/192.0) )
+                  ) / 8.0f + 0.5f ;
+
+    /* Convert to unsigned byte */
+
+    buffer [ i ] = (Uchar) ( level * 255.0 ) ;
+  }
+
+  /* Set up four samples and a loop */
+
+  slSample  *s = new slSample ( buffer, 8000 ) ;
+  slSample *s1 = new slSample ( "scream.ub", & sched ) ;
+  slSample *s2 = new slSample ( "zzap.wav" , & sched ) ;
+  slSample *s3 = new slSample ( "cuckoo.au", & sched ) ;
+  slSample *s4 = new slSample ( "wheeee.ub", & sched ) ;
+
+  /* Mess about with some of the samples... */
+
+  s1 -> adjustVolume ( 2.2  ) ;
+  s2 -> adjustVolume ( 0.5  ) ;
+  s3 -> adjustVolume ( 0.2  ) ;
+
+  /* Play the engine sample continuously. */
+
+  sched . loopSample ( s ) ;
+
+  int tim = 0 ;  /* My periodic event timer. */
+
+  while ( SL_TRUE )
+  {
+    tim++ ;  /* Time passes */
+
+    if ( tim % 200 == 0 ) sched.playSample ( s1 ) ;
+    if ( tim % 180 == 0 ) sched.playSample ( s2 ) ;
+    if ( tim % 150 == 0 ) sched.playSample ( s3 ) ;
+    if ( tim % 120 == 0 ) sched.playSample ( s4 ) ;
+
+    /*
+      For the sake of realism, I'll delay for 1/30th second to
+      simulate a graphics update process.
+    */
+
+#ifdef WIN32
+    Sleep ( 1000 / 30 ) ;      /* 30Hz */
+#elif defined(sgi)
+    sginap( 3 );               /* ARG */
+#else
+    usleep ( 1000000 / 30 ) ;  /* 30Hz */
+#endif
+
+    /*
+      This would normally be called just before the graphics buffer swap
+      - but it could be anywhere where it's guaranteed to get called
+      fairly often.
+    */
+
+    sched . update () ;
+  }
+}
+