From e5888a1ffdae813d7575f5fb02275c6bb07e5199 Mon Sep 17 00:00:00 2001
From: Taru Karttunen <taruti@taruti.net>
Date: Wed, 30 Mar 2011 15:46:40 +0300
Subject: Import sources from 2011-03-30 iso image

---
 sys/src/cmd/unix/drawterm/kern/devaudio-unix.c | 183 +++++++++++++++++++++++++
 1 file changed, 183 insertions(+)
 create mode 100755 sys/src/cmd/unix/drawterm/kern/devaudio-unix.c

(limited to 'sys/src/cmd/unix/drawterm/kern/devaudio-unix.c')

diff --git a/sys/src/cmd/unix/drawterm/kern/devaudio-unix.c b/sys/src/cmd/unix/drawterm/kern/devaudio-unix.c
new file mode 100755
index 000000000..ad5af7458
--- /dev/null
+++ b/sys/src/cmd/unix/drawterm/kern/devaudio-unix.c
@@ -0,0 +1,183 @@
+/*
+ * Linux and BSD
+ */
+#include <sys/ioctl.h>
+#ifdef __linux__
+#include <linux/soundcard.h>
+#else
+#include <sys/soundcard.h>
+#endif
+#include	"u.h"
+#include	"lib.h"
+#include	"dat.h"
+#include	"fns.h"
+#include	"error.h"
+#include	"devaudio.h"
+
+enum
+{
+	Channels = 2,
+	Rate = 44100,
+	Bits = 16,
+	Bigendian = 1,
+};
+
+static int afd = -1;
+static int cfd= -1;
+static int speed;
+
+/* maybe this should return -1 instead of sysfatal */
+void
+audiodevopen(void)
+{
+	int t;
+	ulong ul;
+
+	afd = -1;
+	cfd = -1;
+	if((afd = open("/dev/dsp", OWRITE)) < 0)
+		goto err;
+	if((cfd = open("/dev/mixer", ORDWR)) < 0)
+		goto err;
+	
+	t = Bits;
+	if(ioctl(afd, SNDCTL_DSP_SAMPLESIZE, &t) < 0)
+		goto err;
+	
+	t = Channels-1;
+	if(ioctl(afd, SNDCTL_DSP_STEREO, &t) < 0)
+		goto err;
+	
+	speed = Rate;
+	ul = Rate;
+	if(ioctl(afd, SNDCTL_DSP_SPEED, &ul) < 0)
+		goto err;
+
+	return;
+
+err:
+	if(afd >= 0)
+		close(afd);
+	afd = -1;
+	oserror();
+}
+
+void
+audiodevclose(void)
+{
+	close(afd);
+	close(cfd);
+	afd = -1;
+	cfd = -1;
+}
+
+static struct {
+	int id9;
+	int id;
+} names[] = {
+	Vaudio,	SOUND_MIXER_VOLUME,
+	Vbass, 		SOUND_MIXER_BASS,
+	Vtreb, 		SOUND_MIXER_TREBLE,
+	Vline, 		SOUND_MIXER_LINE,
+	Vpcm, 		SOUND_MIXER_PCM,
+	Vsynth, 		SOUND_MIXER_SYNTH,
+	Vcd, 		SOUND_MIXER_CD,
+	Vmic, 		SOUND_MIXER_MIC,
+//	"record", 		SOUND_MIXER_RECLEV,
+//	"mix",		SOUND_MIXER_IMIX,
+//	"pcm2",		SOUND_MIXER_ALTPCM,
+	Vspeaker,	SOUND_MIXER_SPEAKER
+//	"line1",		SOUND_MIXER_LINE1,
+//	"line2",		SOUND_MIXER_LINE2,
+//	"line3",		SOUND_MIXER_LINE3,
+//	"digital1",	SOUND_MIXER_DIGITAL1,
+//	"digital2",	SOUND_MIXER_DIGITAL2,
+//	"digital3",	SOUND_MIXER_DIGITAL3,
+//	"phonein",		SOUND_MIXER_PHONEIN,
+//	"phoneout",		SOUND_MIXER_PHONEOUT,
+//	"radio",		SOUND_MIXER_RADIO,
+//	"video",		SOUND_MIXER_VIDEO,
+//	"monitor",	SOUND_MIXER_MONITOR,
+//	"igain",		SOUND_MIXER_IGAIN,
+//	"ogain",		SOUND_MIXER_OGAIN,
+};
+
+static int
+lookname(int id9)
+{
+	int i;
+	
+	for(i=0; i<nelem(names); i++)
+		if(names[i].id9 == id9)
+			return names[i].id;
+	return -1;
+}
+
+void
+audiodevsetvol(int what, int left, int right)
+{
+	int id;
+	ulong x;
+	int can, v;
+	
+	if(cfd < 0)
+		error("audio device not open");
+	if(what == Vspeed){
+		x = left;
+		if(ioctl(afd, SNDCTL_DSP_SPEED, &x) < 0)
+			oserror();
+		speed = x;
+		return;
+	}
+	if((id = lookname(what)) < 0)
+		return;
+	if(ioctl(cfd, SOUND_MIXER_READ_DEVMASK, &can) < 0)
+		can = ~0;
+	if(!(can & (1<<id)))
+		return;
+	v = left | (right<<8);
+	if(ioctl(cfd, MIXER_WRITE(id), &v) < 0)
+		oserror();
+}
+
+void
+audiodevgetvol(int what, int *left, int *right)
+{
+	int id;
+	int can, v;
+	
+	if(cfd < 0)
+		error("audio device not open");
+	if(what == Vspeed){
+		*left = *right = speed;
+		return;
+	}
+	if((id = lookname(what)) < 0)
+		return;
+	if(ioctl(cfd, SOUND_MIXER_READ_DEVMASK, &can) < 0)
+		can = ~0;
+	if(!(can & (1<<id)))
+		return;
+	if(ioctl(cfd, MIXER_READ(id), &v) < 0)
+		oserror();
+	*left = v&0xFF;
+	*right = (v>>8)&0xFF;
+}
+
+int
+audiodevwrite(void *v, int n)
+{
+	int m, tot;
+	
+	for(tot=0; tot<n; tot+=m)
+		if((m = write(afd, (uchar*)v+tot, n-tot)) <= 0)
+			oserror();
+	return tot;
+}
+
+int
+audiodevread(void *v, int n)
+{
+	error("no reading");
+	return -1;
+}
-- 
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