From facc11e9560017ebc9c8c7d52e7480b28a8e8381 Mon Sep 17 00:00:00 2001
From: angel <angel@c87de0a0-a11c-0410-a1e5-866214bc28b2>
Date: Sun, 5 Oct 2003 18:58:25 +0000
Subject: [PATCH] SGI output driver finally works.

git-svn-id: file:///home/angel/tmp/svn-triptico/ahxm/trunk@14 c87de0a0-a11c-0410-a1e5-866214bc28b2
---
 out_sgi.c | 38 +++++++++++++++++++++++++++++---------
 1 file changed, 29 insertions(+), 9 deletions(-)

diff --git a/out_sgi.c b/out_sgi.c
index 289c4c2..04980c0 100644
--- a/out_sgi.c
+++ b/out_sgi.c
@@ -39,6 +39,14 @@ static ALconfig ac;
 /* audio port */
 static ALport ap;
 
+/* handmade buffering */
+#ifndef BUFFER_SIZE
+#define BUFFER_SIZE 65536
+#endif
+
+static short _buffer[BUFFER_SIZE];
+static int _bindex=0;
+
 
 /*******************
 	Code
@@ -46,11 +54,12 @@ static ALport ap;
 
 int _out_open_sgi(char * file)
 {
+	ALpv p[1];
+
 	ac=alNewConfig();
 
 	if(!ac) return(-100);
 
-	/* set stereo, 16 bit, signed */
 	if(alSetChannels(ac, AL_STEREO)==-1)
 		return(-101);
 
@@ -60,12 +69,21 @@ int _out_open_sgi(char * file)
 	if(alSetSampFmt(ac, AL_SAMPFMT_TWOSCOMP)==-1)
 		return(-103);
 
-	if(alSetDevice(ac, AL_DEFAULT_OUTPUT)==-1)
+	if(alSetQueueSize(ac, 131069)==-1)
 		return(-104);
 
+	if(alSetDevice(ac, AL_DEFAULT_OUTPUT)==-1)
+		return(-105);
+
+	p[0].param=AL_OUTPUT_RATE;
+	p[0].value.ll=alDoubleToFixed((double)_frequency);
+
+	if(alSetParams(alGetDevice(ac), p, 1)==-1)
+		return(-106);
+
 	ap=alOpenPort("Ann Hell", "w", ac);
 
-	if(!ap) return(-105);
+	if(!ap) return(-107);
 
 	return(0);
 }
@@ -73,12 +91,14 @@ int _out_open_sgi(char * file)
 
 int _out_write_sgi(int lsample, int rsample)
 {
-	short buf[2];
-
-	buf[0]=(short) lsample;
-	buf[1]=(short) rsample;
-
-	alWriteFrames(ap, buf, 2);
+	_buffer[_bindex++]=(short)lsample;
+	_buffer[_bindex++]=(short)rsample;
+
+	if(_bindex==BUFFER_SIZE)
+	{
+		alWriteFrames(ap, _buffer, BUFFER_SIZE / 2);
+		_bindex=0;
+	}
 
 	return(0);
 }
-- 
2.11.4.GIT