From c0b89ac5bfb90835ef01573267020e42d4fe070c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= <debian@jff-webhosting.net>
Date: Sun, 23 Aug 2015 12:17:05 +0200
Subject: Imported Upstream version 1.8.0

---
 tiff/tools/ycbcr.c | 168 -----------------------------------------------------
 1 file changed, 168 deletions(-)
 delete mode 100644 tiff/tools/ycbcr.c

(limited to 'tiff/tools/ycbcr.c')

diff --git a/tiff/tools/ycbcr.c b/tiff/tools/ycbcr.c
deleted file mode 100644
index 8f72447..0000000
--- a/tiff/tools/ycbcr.c
+++ /dev/null
@@ -1,168 +0,0 @@
-float	ycbcrCoeffs[3] = { .299, .587, .114 };
-/* default coding range is CCIR Rec 601-1 with no headroom/footroom */
-unsigned long refBlackWhite[6] = { 0, 255, 128, 255, 128, 255 };
-
-#define	LumaRed		ycbcrCoeffs[0]
-#define	LumaGreen	ycbcrCoeffs[1]
-#define	LumaBlue	ycbcrCoeffs[2]
-
-long	eRtotal = 0;
-long	eGtotal = 0;
-long	eBtotal = 0;
-long	preveRtotal = 0;
-long	preveGtotal = 0;
-long	preveBtotal = 0;
-unsigned long AbseRtotal = 0;
-unsigned long AbseGtotal = 0;
-unsigned long AbseBtotal = 0;
-unsigned long eCodes = 0;
-unsigned long preveCodes = 0;
-unsigned long eBits = 0;
-unsigned long preveBits = 0;
-
-static	void setupLumaTables();
-static int abs(int v) { return (v < 0 ? -v : v); }
-static double pct(int v,double range) { return (v*100. / range); }
-static void check(int R, int G, int B);
-
-float	D1, D2;
-float	D3, D4;
-float	D5, D6;
-
-int
-main(int argc, char** argv)
-{
-    int R, G, B;
-
-    if (argc > 1) {
-	refBlackWhite[0] = 16;
-	refBlackWhite[1] = 235;
-	refBlackWhite[2] = 128;
-	refBlackWhite[3] = 240;
-	refBlackWhite[4] = 128;
-	refBlackWhite[5] = 240;
-    }
-    D3 = 2 - 2*LumaRed;
-    D4 = 2 - 2*LumaBlue;
-    D1 = 1. / D3;
-    D2 = 1. / D4;
-    D5 = D3*LumaRed / LumaGreen;
-    D6 = D4*LumaBlue / LumaGreen;
-    setupLumaTables();
-    for (R = 0; R < 256; R++) {
-	for (G = 0; G < 256; G++)
-	    for (B = 0; B < 256; B++)
-		check(R, G, B);
-	printf("[%3u] c %u/%u b %u/%u (R %u/%d/%u G %u/%d/%u B %u/%d/%u)\n"
-	    , R
-	    , eCodes - preveCodes, eCodes
-	    , eBits - preveBits, eBits
-	    , abs(AbseRtotal - preveRtotal), eRtotal , AbseRtotal
-	    , abs(AbseGtotal - preveGtotal), eGtotal , AbseGtotal
-	    , abs(AbseBtotal - preveBtotal), eBtotal , AbseBtotal
-	);
-	preveRtotal = AbseRtotal;
-	preveGtotal = AbseGtotal;
-	preveBtotal = AbseBtotal;
-	preveCodes = eCodes;
-	preveBits = eBits;
-    }
-    printf("%u total codes\n", 256*256*256);
-    printf("total error: %u codes %u bits (R %d/%u G %d/%u B %d/%u)\n"
-	, eCodes
-	, eBits
-	, eRtotal , AbseRtotal
-	, eGtotal , AbseGtotal
-	, eBtotal , AbseBtotal
-    );
-    return (0);
-}
-
-float	*lumaRed;
-float	*lumaGreen;
-float	*lumaBlue;
-
-static float*
-setupLuma(float c)
-{
-    float *v = (float *)_TIFFmalloc(256 * sizeof (float));
-    int i;
-    for (i = 0; i < 256; i++)
-	v[i] = c * i;
-    return (v);
-}
-
-static void
-setupLumaTables(void)
-{
-    lumaRed = setupLuma(LumaRed);
-    lumaGreen = setupLuma(LumaGreen);
-    lumaBlue = setupLuma(LumaBlue);
-}
-
-static unsigned
-V2Code(float f, unsigned long RB, unsigned long RW, int CR)
-{
-    unsigned int c = (unsigned int)((((f)*(RW-RB)/CR)+RB)+.5);
-    return (c > 255 ? 255 : c);
-}
-
-#define	Code2V(c, RB, RW, CR)	((((c)-(int)RB)*(float)CR)/(float)(RW-RB))
-
-#define	CLAMP(f,min,max) \
-    (int)((f)+.5 < (min) ? (min) : (f)+.5 > (max) ? (max) : (f)+.5)
-
-static
-void
-check(int R, int G, int B)
-{
-    float Y, Cb, Cr;
-    int iY, iCb, iCr;
-    float rY, rCb, rCr;
-    float rR, rG, rB;
-    int eR, eG, eB;
-
-    Y = lumaRed[R] + lumaGreen[G] + lumaBlue[B];
-    Cb = (B - Y)*D2;
-    Cr = (R - Y)*D1;
-    iY = V2Code(Y, refBlackWhite[0], refBlackWhite[1], 255);
-    iCb = V2Code(Cb, refBlackWhite[2], refBlackWhite[3], 127);
-    iCr = V2Code(Cr, refBlackWhite[4], refBlackWhite[5], 127);
-    rCb = Code2V(iCb, refBlackWhite[2], refBlackWhite[3], 127);
-    rCr = Code2V(iCr, refBlackWhite[4], refBlackWhite[5], 127);
-    rY = Code2V(iY, refBlackWhite[0], refBlackWhite[1], 255);
-    rR = rY + rCr*D3;
-    rB = rY + rCb*D4;
-    rG = rY - rCb*D6 - rCr*D5;
-    eR = R - CLAMP(rR,0,255);
-    eG = G - CLAMP(rG,0,255);
-    eB = B - CLAMP(rB,0,255);
-    if (abs(eR) > 1 || abs(eG) > 1 || abs(eB) > 1) {
-	printf("R %u G %u B %u", R, G, B);
-	printf(" Y %g Cb %g Cr %g", Y, Cb, Cr);
-	printf(" iY %u iCb %u iCr %u", iY, iCb, iCr);
-	printf("\n -> Y %g Cb %g Cr %g", rY, rCb, rCr);
-	printf(" R %g (%u) G %g (%u) B %g (%u) E=[%d %d %d])\n"
-	    , rR, CLAMP(rR,0,255)
-	    , rG, CLAMP(rG,0,255)
-	    , rB, CLAMP(rB,0,255)
-	    , eR, eG, eB
-	);
-    }
-    eRtotal += eR;
-    eGtotal += eG;
-    eBtotal += eB;
-    AbseRtotal += abs(eR);
-    AbseGtotal += abs(eG);
-    AbseBtotal += abs(eB);
-    if (eR | eG | eB)
-	eCodes++;
-    eBits += abs(eR) + abs(eG) + abs(eB);
-}
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 8
- * fill-column: 78
- * End:
- */
-- 
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