shithub: neindaw

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piper: mixer: limit output

--- a/piper/piper.c

+++ b/piper/piper.c

@@ -187,7 +187,7 @@

 {

 	int i, j, n;

 	s16int *pcm;

-	float *out, *x;

+	float *out, *x, f;

 	pcm = malloc(2*Bufframes*sizeof(*pcm));

 	out = malloc(Bufframes*sizeof(*out));

@@ -205,7 +205,12 @@

 		}

 		qunlock(&grouplock);

 		for (n = 0; n < Bufframes; n++) {

-			pcm[n*2+0] = pcm[n*2+1] = out[n] * 8192.0 * vol;

+			f = out[n] * 8192.0 * vol;

+			if (f > 32767.0)

+				f = 32767.0;

+			else if (f < -32767.0)

+				f = -32767.0;

+			pcm[n*2+0] = pcm[n*2+1] = f;

 		}

 		if (write(audio, pcm, 2*Bufframes*sizeof(*pcm)) < 0)

 			break;