From 4d55af8c59af4580e3adee396e063ddc41624dce Mon Sep 17 00:00:00 2001
From: espie <espie@openbsd.org>
Date: Tue, 28 May 2002 14:32:31 +0000
Subject: [PATCH] Add code similar to audio_out_oss to perform downsampling.

---
 .../patches/patch-libao_audio_out_solaris_c   | 82 +++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 x11/ogle/patches/patch-libao_audio_out_solaris_c

diff --git a/x11/ogle/patches/patch-libao_audio_out_solaris_c b/x11/ogle/patches/patch-libao_audio_out_solaris_c
new file mode 100644
index 00000000000..3bb14360eb5
--- /dev/null
+++ b/x11/ogle/patches/patch-libao_audio_out_solaris_c
@@ -0,0 +1,82 @@
+$OpenBSD: patch-libao_audio_out_solaris_c,v 1.1 2002/05/28 14:32:31 espie Exp $
+--- libao/audio_out_solaris.c.orig	Mon Oct 22 03:23:49 2001
++++ libao/audio_out_solaris.c	Tue May 28 16:28:30 2002
+@@ -71,6 +71,37 @@ static inline int16_t convert (int32_t i
+ 	return i - 0x43c00000;
+ }
+ 
++unsigned char tr[235] =
++{
++  0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22,
++  23, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
++  44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 62, 63,
++  64, 65, 66, 67, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84,
++  85, 86, 87, 88, 89, 90, 91, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103,
++  104, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 118, 119, 120,
++  121, 122, 123, 124, 125, 126, 127, 128, 130, 131, 132, 133, 134, 135, 136,
++  137, 138, 139, 140, 141, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152,
++  153, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 167, 168, 169,
++  170, 171, 172, 173, 174, 175, 176, 177, 179, 180, 181, 182, 183, 184, 185,
++  186, 187, 188, 189, 190, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201,
++  202, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 216, 217, 218,
++  219, 220, 221, 222, 223, 224, 225, 226, 227, 229, 230, 231, 232, 233, 234,
++  235, 236, 237, 238, 239, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250,
++  251, 253, 254, 255
++};
++
++static inline int float_to_int48_44 (float * _f, int16_t * s16, int flags)
++{
++  int i;
++  int32_t * f = (int32_t *) _f;
++
++    for (i = 0; i < 235; i++) {
++	s16[2*i] = convert (f[tr[i]]);
++	s16[2*i+1] = convert (f[tr[i]+256]);
++    }
++    return i;
++}
++
+ static inline void float_to_int (float * _f, int16_t * s16, int flags)
+ {
+     int i;
+@@ -97,6 +128,7 @@ int solaris_play (ao_instance_t * _insta
+ {
+     solaris_instance_t * instance = (solaris_instance_t *) _instance;
+     int16_t int16_samples[256*2];
++    static int downsample = 0;
+ 
+ #ifdef LIBA52_DOUBLE
+     float samples[256 * 2];
+@@ -127,6 +159,15 @@ int solaris_play (ao_instance_t * _insta
+ 	    perror ("Writing audio config block");
+ 	    return 1;
+ 	}
++	if (info.play.sample_rate != instance->sample_rate &&
++		instance->sample_rate == 48000) {
++		info.play.sample_rate = 44100;
++		if (ioctl (instance->fd, AUDIO_SETINFO, &info) < 0) {
++		    perror ("Writing audio config block");
++		    return 1;
++		}
++		downsample = 1;
++	}
+ 
+ 	if ((info.play.sample_rate != instance->sample_rate) ||
+ 	    (info.play.precision != 16) || (info.play.channels != 2)) {
+@@ -149,8 +190,14 @@ int solaris_play (ao_instance_t * _insta
+     } else if (flags != instance->flags)
+ 	return 1;
+ 
+-    float_to_int (samples, int16_samples, flags);
+-    write (instance->fd, int16_samples, 256 * sizeof (int16_t) * 2);
++    if (downsample) {
++      int num;
++      num = float_to_int48_44(samples, int16_samples, flags);
++      write(instance->fd, int16_samples, num * sizeof (int16_t) * 2);
++    } else {
++	float_to_int (samples, int16_samples, flags);
++	write (instance->fd, int16_samples, 256 * sizeof (int16_t) * 2);
++    }
+ 
+     return 0;
+ }