$OpenBSD: patch-dacio-linux_c,v 1.2 2009/12/24 21:43:32 jakemsr Exp $
--- dacio-linux.c.orig	Sun Sep 17 05:51:43 1995
+++ dacio-linux.c	Sat Dec 19 22:00:33 2009
@@ -1,10 +1,8 @@
 #line 2 "dacio-linux.c"
+#include <stdlib.h>
 #include <stdio.h>	/*(perror)*/
-#include <fcntl.h>	/*O_WRONLY*/
-#include <sys/ioctl.h>	/*(ioctl)*/
 #include <unistd.h>	/*(write)*/
-#include <sys/soundcard.h> /*SNDCTL_XXX*/
-#include <errno.h>	/*EINTR*/
+#include <sndio.h>
 #include "defs.h"	/*u8,u16*/
 #include "dacio.h"	/*(dacioXXX)*/
 #include "mem.h"	/*(memPerm)*/
@@ -27,18 +25,14 @@ makeLim(void)
 }
 #endif
 
-static int fd;
+static struct sio_hdl *hdl;
 
-#ifndef DAC_DEV
-#define DAC_DEV	"/dev/dsp"
-#endif
-
 void
 dacioInit(void)
 {
-    fd = open(DAC_DEV, O_WRONLY);
-    if (fd < 0) {
-	perror("dacioInit");
+    hdl = sio_open(NULL, SIO_PLAY, 0);
+    if (hdl == NULL) {
+	fprintf(stderr, "dacioInit failed");
 	exit(1);
     }
     /*makeLim();*/
@@ -59,52 +53,42 @@ static DacioConfInfo dci;
 void
 dacioConf(DacioConfInfo *dcp)
 {
-    int tmp;
+    struct sio_par par;
 
-#if 0
-    if (ioctl(fd, SNDCTL_DSP_RESET) < 0) {
-	perror("dacioConf");
-	exit(1);
-    }
-#endif
-    tmp = AFMT_U8;
-    if (ioctl(fd, SNDCTL_DSP_SETFMT, &tmp) < 0) {
-	perror("dacioConf");
-	exit(1);
-    }
-    /*fprintf(stderr, "fmt = 0x%x\n", tmp);*/
+    sio_initpar(&par);
+    par.bits = 8;
+    par.sig = 0;
+    par.pchan = dcp->stereo + 1;
+    par.rate = dcp->speed;
 
-    if (ioctl(fd, SNDCTL_DSP_STEREO, &dcp->stereo) < 0) {
-	perror("dacioConf");
+    if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) {
+	fprintf(stderr, "dacioConf failed: set/get\n");
 	exit(1);
     }
-    /*fprintf(stderr, "stereo = %d\n", dcp->stereo);*/
 
-    if (ioctl(fd, SNDCTL_DSP_SPEED, &dcp->speed) < 0) {
-	perror("dacioConf");
+    if (par.bits != 8 || par.sig != 0 || par.pchan != dcp->stereo + 1 ||
+      par.rate != dcp->speed) {
+	fprintf(stderr, "dacioConf failed: inappropriate settings\n");
 	exit(1);
     }
-    /*fprintf(stderr, "speed = %d\n", dcp->speed);*/
 
-    if (ioctl(fd, SNDCTL_DSP_GETBLKSIZE, &buf.size) < 0) {
-	perror("dacioConf");
-	exit(1);
-    }
-    /*fprintf(stderr, "buffer size = 0x%x\n", buf.size);*/
+    buf.size = par.round * par.bps * par.pchan;
+
     dci = *dcp;
     /*if (buf.top != NULL) free(buf.top);*/
     buf.top = memPerm(buf.size * sizeof(u8));
     buf.p.p8 = buf.top;
     buf.bot = buf.top + buf.size;
+
+    if (!sio_start(hdl)) {
+	fprintf(stderr, "dacioConf failed: couldn't start\n");
+	exit(1);
+    }
 }
 
 void
 dacioSync(void)
 {
-    if (ioctl(fd, SNDCTL_DSP_SYNC, NULL) < 0) {
-	perror("dacioSync");
-	exit(1);
-    }
 }
 
 /* OS independent part (?) */
@@ -116,12 +100,10 @@ dacioFlush(void)
 
     if (buf.p.p8 <= buf.top) return;
     for ( ; buf.p.p8 < buf.bot; buf.p.p8++) *buf.p.p8 = 128;
- RETRY:
-    s = write(fd, buf.top, buf.size);
+    s = sio_write(hdl, buf.top, buf.size);
     if (s < buf.size) {
-	if (s < 0) {
-	    if (errno == EINTR) goto RETRY;
-	    perror("dacioFlush");
+	if (s == 0) {
+	    fprintf(stderr, "dacioFlush: write failed\n");
 	} else fprintf(stderr, "wrote only %d bytes\n", s);
 	exit(1);
     }