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@ -55,39 +55,15 @@ int main ()
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int tim = 0 ; /* My periodic event timer. */
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slEnvelope pitch_envelope ( 3, SL_SAMPLE_LOOP ) ;
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slEnvelope p_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
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slEnvelope volume_envelope ( 3, SL_SAMPLE_LOOP ) ;
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while ( SL_TRUE )
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{
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tim++ ; /* Time passes */
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tim++ ; /* Time passes */
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if ( tim % 200 == 0 ) sched.playSample ( s1 ) ;
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if ( tim % 180 == 0 ) sched.playSample ( s2 ) ;
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if ( tim % 150 == 0 ) sched.playSample ( s3 ) ;
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if ( tim % 120 == 0 ) sched.playSample ( s4 ) ;
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if ( tim == 60 ) {
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// introduce an envelope for our engine noise after 10 seconds
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pitch_envelope.setStep ( 0, 0.0, 1.0 ) ;
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pitch_envelope.setStep ( 1, 5.0, 2.0 ) ;
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pitch_envelope.setStep ( 2, 10.0, 1.0 ) ;
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p_envelope.setStep ( 0, 5.0, 2.0 ) ;
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volume_envelope.setStep ( 0, 0.0, 1.0 ) ;
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volume_envelope.setStep ( 1, 5.0, 2.0 ) ;
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volume_envelope.setStep ( 2, 10.0, 1.0 ) ;
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// scheduler -> playSample ( my_sample ) ;
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sched.addSampleEnvelope( s, 0, 0, &p_envelope, SL_PITCH_ENVELOPE );
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sched.addSampleEnvelope( s, 0, 1, &volume_envelope, SL_VOLUME_ENVELOPE);
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}
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/*
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For the sake of realism, I'll delay for 1/30th second to
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simulate a graphics update process.
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