75 lines
1.4 KiB
C++
75 lines
1.4 KiB
C++
#define SE_NOISE 0
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#define SE_SWEEP 1
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class CSoundEffectFrame
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{
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I32 type;
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F64 duration,freq1,freq2;
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};
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U0 SoundEffectEndTaskCB()
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{
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Free(FramePtr("CSoundEffectFrame"));
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music_mute--;
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SndTaskEndCB;
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}
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U0 SoundEffectTask(CSoundEffectFrame *ns)
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{
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I64 i;
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F64 f,t0=tS,t,timeout=t0+ns->duration;
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FramePtrAdd("CSoundEffectFrame",ns);
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Fs->task_end_cb=&SoundEffectEndTaskCB;
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switch (ns->type) {
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case SE_NOISE:
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i=MaxI64(ns->freq2-ns->freq1,1);
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while (tS<timeout)
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if (f=RandU16%i+ns->freq1) {
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Snd(f);
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Sleep(MaxI64(3000/f,1));
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} else
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break;
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break;
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case SE_SWEEP:
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while (tS<timeout) {
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t=(tS-t0)/ns->duration;
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if (f=(1.0-t)*ns->freq1+t*ns->freq2) {
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Snd(f);
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Sleep(MaxI64(3000/f,1));
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} else
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break;
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}
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break;
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}
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}
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public CTask *Noise(I64 mS,F64 min_freq,F64 max_freq)
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{
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CSoundEffectFrame *ns;
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if (mS>0) {
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ns=MAlloc(sizeof(CSoundEffectFrame));
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ns->type=SE_NOISE;
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ns->duration=mS/1000.0;
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ns->freq1=min_freq;
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ns->freq2=max_freq;
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music_mute++;
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return Spawn(&SoundEffectTask,ns,"Noise",,Fs);
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} else
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return NULL;
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}
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public CTask *Sweep(I64 mS,F64 freq1,F64 freq2)
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{
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CSoundEffectFrame *ns;
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if (mS>0) {
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ns=MAlloc(sizeof(CSoundEffectFrame));
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ns->type=SE_SWEEP;
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ns->duration=mS/1000.0;
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ns->freq1=freq1;
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ns->freq2=freq2;
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music_mute++;
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return Spawn(&SoundEffectTask,ns,"Noise",,Fs);
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} else
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return NULL;
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}
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