Tobias Oelbaum's sgi2yuv utility

[mikeiz]

I'm trying to find the sgi2yuv program and I'm not finding it. I have a copy, but it looks like the global.h file is corrupted because it has main() and executable code in it. It doesn't look like a header file. I checked Tobias' website using the link in derf's collection, but the site is not found. Any help would be appreciated.

Mike

[StainlessS]

Perhaps try google

"Tobias Oelbaum" NEAR "sgi2yuv"

https://www.google.co.uk/search?q=%22Tobias+Oelbaum%22+NEAR+%22sgi2yuv%22&ei=L1idYOHYGI3hULnJsrAO&oq=%22Tobias+Oelbaum%22+NEAR+%22sgi2yuv%22&gs_lcp=Cgdnd3Mtd2l6EAM6BwgAELADEB46CQgAELADEAcQHjoGCAAQFhAeOgQIABAeOgYIABAHEB46BQghEKABUKsOWOrlAWDu6AFoAXAAeACAAaQBiAH_DZIBAzguOJgBAKABAaABAqoBB2d3cy13aXrIAQPAAQE&sclient=gws-wiz&ved=0ahUKEwihrOWWjsfwAhWNMBQKHbmkDOYQ4dUDCA0&uact=5

EDIT: My UBlock Origin (ad blocker) blocks access to many of those site links, saying is malicious.

[mikeiz]

This points to the same sites. They use the same link to Tobias' site to get the software but he must have moved it or is not working there anymore.

[StainlessS]

This help at all.
from google

"sgi2yuv" -"Tobias Oelbaum"

https://www.google.co.uk/search?q=+%22sgi2yuv%22+-%22Tobias+Oelbaum%22&source=hp&ei=w4CdYJWwL8uOlwT8sbyIDg&iflsig=AINFCbYAAAAAYJ2O08UZVHre-prEcLmVVdmOYKNm2__W&oq=+%22sgi2yuv%22+-%22Tobias+Oelbaum%22&gs_lcp=Cgdnd3Mtd2l6EAM6AggpOggIABDqAhCPAVDDHliCwQFgvcoBaANwAHgBgAHBBIgB3wmSAQcwLjUuNS0xmAEBoAECoAEBqgEHZ3dzLXdperABCg&sclient=gws-wiz&ved=0ahUKEwjVna3wtMfwAhVLx4UKHfwYD-EQ4dUDCAg&uact=5

ie, links not mentioning the guys name. [as you say links mentioning his name did not help]
From 2nd link, @ avsforum.com
http://www.w6rz.net/sgitoyuv.zip


/*
SGI 16-bit RGB to 8-bit 4:2:2 YCbCr (UYVY) conversion
*/

#include <stdio.h>
#include <stdlib.h>

#define TRUE 1
#define FALSE 0

void conv444to422(unsigned char *src, unsigned char *dst, int width, int height);

unsigned char *Clip;

int main(int argc, char **argv)
{
FILE *fp;
FILE *fpout;
int length, i, j, horz, vert, index = 0;
int r, g, b;
double y, u, v;
double cr, cg, cb, cu, cv;
unsigned char *yp, *up, *vp;
int matrix_coefficients = 1;
unsigned int py, pcb, pcr;
static unsigned char buffer_422output[3840 * 2160 * 2];
static unsigned char buffer_422Cb[3840 * 2160 / 2];
static unsigned char buffer_422Cr[3840 * 2160 / 2];
static unsigned char buffer_444Y[3840 * 2160];
static unsigned char buffer_444Cb[3840 * 2160];
static unsigned char buffer_444Cr[3840 * 2160];
static unsigned short buffer_444input[3840 * 2160 * 3];
static double coef[7][3] = {
{0.2126, 0.7152, 0.0722}, /* ITU-R Rec. 709 (2002) */
{0.299, 0.587, 0.114}, /* unspecified */
{0.299, 0.587, 0.114}, /* reserved */
{0.30, 0.59, 0.11}, /* FCC */
{0.299, 0.587, 0.114}, /* ITU-R Rec. 624-4 System B, G */
{0.299, 0.587, 0.114}, /* SMPTE 170M */
{0.212, 0.701, 0.087}}; /* SMPTE 240M (1987) */

if (argc != 5) {
fprintf(stderr, "usage: sgitoyuv <horz> <vert> <infile> <outfile>\n");
exit(-1);
}

/*--- open binary file (for parsing) ---*/
fp = fopen(argv[3], "rb");
if (fp == 0) {
fprintf(stderr, "Cannot open input file <%s>\n", argv[3]);
exit(-1);
}

/*--- open binary file (for parsing) ---*/
fpout = fopen(argv[4], "wb");
if (fpout == 0) {
fprintf(stderr, "Cannot open output file <%s>\n", argv[4]);
exit(-1);
}

/* Clip table */
if (!(Clip=(unsigned char *)malloc(1024)))
printf("Clip[] malloc failed\n");

Clip += 384;

for (i = -384; i < 640; i++)
Clip[i] = (i<0) ? 0 : ((i>255) ? 255 : i);

horz = atoi(argv[1]);
vert = atoi(argv[2]);
length = fread(&buffer_444input[0], 1, 512, fp);
length = fread(&buffer_444input[0], 1, (horz * vert * 6), fp);

i = matrix_coefficients;
cr = coef[i-1][0];
cg = coef[i-1][1];
cb = coef[i-1][2];
cu = 0.5/(1.0-cb);
cv = 0.5/(1.0-cr);

index = ((horz * (vert - 1)));

for (i = 0; i < vert; i++)
{
yp = &buffer_444Y[0] + i*horz;
up = &buffer_444Cb[0] + i*horz;
vp = &buffer_444Cr[0] + i*horz;

for (j =0 ; j < horz; j++)
{
r = buffer_444input[index];
g = buffer_444input[index + (horz*vert)];
b = buffer_444input[index + (horz*vert*2)];
#if 0
r = ((r & 0xff) << 8) + ((r & 0xff00) >> 8);
g = ((g & 0xff) << 8) + ((g & 0xff00) >> 8);
b = ((b & 0xff) << 8) + ((b & 0xff00) >> 8);
#else
r = r & 0xff;
g = g & 0xff;
b = b & 0xff;
#endif
index++;

/* convert to YUV */
y = cr * r + cg * g + cb * b;
u = cu*(b-y);
v = cv*(r-y);
#if 0
y /= 256;
u /= 256;
v /= 256;
#endif
yp[j] = (219.0/255.0)*y + 16.5;
up[j] = (224.0/255.0)*u + 128.5;
vp[j] = (224.0/255.0)*v + 128.5;
}
index = index - (horz * 2);
}
conv444to422(&buffer_444Cb[0], &buffer_422Cb[0], horz, vert);
conv444to422(&buffer_444Cr[0], &buffer_422Cr[0], horz, vert);
py = 0;
pcb = 0;
pcr = 0;
for (i = 0; i < (horz * vert * 2); i++)
{
if ((i % 2) == 1)
{
buffer_422output[i] = buffer_444Y[py++];
}
else if ((i % 4) == 0)
{
buffer_422output[i] = buffer_422Cb[pcb++];
}
else
{
buffer_422output[i] = buffer_422Cr[pcr++];
}
}
fwrite(&buffer_422output[0], 1, (horz * vert * 2), fpout);
fclose(fp);
fclose(fpout);
return 0;
}

/* horizontal filter and 2:1 subsampling */
void conv444to422(unsigned char *src, unsigned char *dst, int width, int height)
{
int i, j, im5, im4, im3, im2, im1, ip1, ip2, ip3, ip4, ip5, ip6;

if (0)
{
for (j=0; j<height; j++)
{
for (i=0; i<width; i+=2)
{
im5 = (i<5) ? 0 : i-5;
im4 = (i<4) ? 0 : i-4;
im3 = (i<3) ? 0 : i-3;
im2 = (i<2) ? 0 : i-2;
im1 = (i<1) ? 0 : i-1;
ip1 = (i<width-1) ? i+1 : width-1;
ip2 = (i<width-2) ? i+2 : width-1;
ip3 = (i<width-3) ? i+3 : width-1;
ip4 = (i<width-4) ? i+4 : width-1;
ip5 = (i<width-5) ? i+5 : width-1;
ip6 = (i<width-5) ? i+6 : width-1;

/* FIR filter with 0.5 sample interval phase shift */
dst[i>>1] = Clip[(int)(228*(src[i]+src[ip1])
+70*(src[im1]+src[ip2])
-37*(src[im2]+src[ip3])
-21*(src[im3]+src[ip4])
+11*(src[im4]+src[ip5])
+ 5*(src[im5]+src[ip6])+256)>>9];
}
src+= width;
dst+= width>>1;
}
}
else
{
/* MPEG-2 */
for (j=0; j<height; j++)
{
for (i=0; i<width; i+=2)
{
im5 = (i<5) ? 0 : i-5;
im3 = (i<3) ? 0 : i-3;
im1 = (i<1) ? 0 : i-1;
ip1 = (i<width-1) ? i+1 : width-1;
ip3 = (i<width-3) ? i+3 : width-1;
ip5 = (i<width-5) ? i+5 : width-1;

/* Original FIR filter coefficients (*512): 22 0 -52 0 159 256 159 0 -52 0 22 */
/* It's a bug. Filter coefficients must add up to 512!!! */

/* FIR filter coefficients (*512): 21 0 -52 0 159 256 159 0 -52 0 21 */
dst[i>>1] = Clip[(int)( 21*(src[im5]+src[ip5])-52*(src[im3]+src[ip3])
+159*(src[im1]+src[ip1])+256*src[i]+256)>>9];
}
src+= width;
dst+= width>>1;
}
}
}

[mikeiz]

Do you have the original global.h file for sgi2yuv?

[StainlessS]

No.
As it does not include a [non standard] header, I presume that there aint one.

EDIT:
Arh, there is this, but looks like you have to join a chinese site [with no guarantee that they have it].

configfile.h
global.h
sgi2yuv.c
sgi2yuv.cfg
configfile.c
sgi2yuv.exe

https://www.dssz.com/594146.html
Google Translated:- https://translate.google.com/translate?tl=en-GB&u=https://www.dssz.com/594146.html

If you know a site where it was once posted, you might find it on Archive.org
[I cant access Archive.org, my ISP blocks it for some reason - I used to be able to access it, not now].