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Date:: Fri Jan 10 14:54:30 2020 UTC
Message:: Trivial changes: whitespace and modes. Remote whitespace at the ends of lines. Remove blank lines from the ends of files. Change modes on source files so that they are not executable. Signed-off-by: Dan Cross <cross@gajendra.net>
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  1 28994509 2004-04-21 devnull /* readyuv.c - read an Abekas A66 style image file.   Steve Simon, 2003 */
  2 28994509 2004-04-21 devnull #include <u.h>
  3 28994509 2004-04-21 devnull #include <libc.h>
  4 28994509 2004-04-21 devnull #include <bio.h>
  5 28994509 2004-04-21 devnull #include <draw.h>
  6 28994509 2004-04-21 devnull #include <ctype.h>
  7 28994509 2004-04-21 devnull #include "imagefile.h"
  8 28994509 2004-04-21 devnull 
  9 28994509 2004-04-21 devnull /*
 10 28994509 2004-04-21 devnull  * ITU/CCIR Rec601 states:
 11 28994509 2004-04-21 devnull  *
 12 28994509 2004-04-21 devnull  * R = y + 1.402 * Cr
 13 28994509 2004-04-21 devnull  * B = Y + 1.77305 * Cb
 14 28994509 2004-04-21 devnull  * G = Y - 0.72414 * Cr - 0.34414 * Cb
 15 28994509 2004-04-21 devnull  *
 16 28994509 2004-04-21 devnull  *	using 8 bit traffic
 17 28994509 2004-04-21 devnull  * Y = 16 + 219 * Y
 18 28994509 2004-04-21 devnull  * Cr = 128 + 224 * Cr
 19 28994509 2004-04-21 devnull  * Cb = 128 + 224 * Cb
 20 28994509 2004-04-21 devnull  * 	or, if 10bit is used
 21 28994509 2004-04-21 devnull  * Y = 64 + 876 * Y
 22 28994509 2004-04-21 devnull  * Cr = 512 + 896 * Cr
 23 28994509 2004-04-21 devnull  * Cb = 512 + 896 * Cb
 24 28994509 2004-04-21 devnull  */
 25 28994509 2004-04-21 devnull 
 26 28994509 2004-04-21 devnull enum {
 27 28994509 2004-04-21 devnull 	PAL = 576, NTSC = 486 };
 28 28994509 2004-04-21 devnull 
 29 28994509 2004-04-21 devnull 
 30 28994509 2004-04-21 devnull static int lsbtab[] = { 6, 4, 2, 0};
 31 28994509 2004-04-21 devnull 
 32 fa325e9b 2020-01-10 cross static int
 33 28994509 2004-04-21 devnull clip(int x)
 34 28994509 2004-04-21 devnull {
 35 28994509 2004-04-21 devnull 	x >>= 18;
 36 28994509 2004-04-21 devnull 
 37 28994509 2004-04-21 devnull 	if (x > 255)
 38 28994509 2004-04-21 devnull 		return 0xff;
 39 28994509 2004-04-21 devnull 	if (x <= 0)
 40 28994509 2004-04-21 devnull 		return 0;
 41 28994509 2004-04-21 devnull 	return x;
 42 28994509 2004-04-21 devnull }
 43 28994509 2004-04-21 devnull 
 44 28994509 2004-04-21 devnull 
 45 28994509 2004-04-21 devnull Rawimage**
 46 28994509 2004-04-21 devnull Breadyuv(Biobuf *bp, int colourspace)
 47 28994509 2004-04-21 devnull {
 48 28994509 2004-04-21 devnull 	Dir * d;
 49 28994509 2004-04-21 devnull 	Rawimage * a, **array;
 50 28994509 2004-04-21 devnull 	char	*e, ebuf[128];
 51 28994509 2004-04-21 devnull 	ushort * mux, *end, *frm;
 52 28994509 2004-04-21 devnull 	uchar buf[720 * 2], *r, *g, *b;
 53 28994509 2004-04-21 devnull 	int	y1, y2, cb, cr, sz, c, l, w, base, bits, lines;
 54 28994509 2004-04-21 devnull 
 55 28994509 2004-04-21 devnull 	frm = 0;
 56 28994509 2004-04-21 devnull 	if (colourspace != CYCbCr) {
 57 28994509 2004-04-21 devnull 		errstr(ebuf, sizeof ebuf);	/* throw it away */
 58 28994509 2004-04-21 devnull 		werrstr("ReadYUV: unknown colour space %d", colourspace);
 59 28994509 2004-04-21 devnull 		return nil;
 60 28994509 2004-04-21 devnull 	}
 61 28994509 2004-04-21 devnull 
 62 28994509 2004-04-21 devnull 	if ((a = calloc(sizeof(Rawimage), 1)) == nil)
 63 28994509 2004-04-21 devnull 		sysfatal("no memory");
 64 28994509 2004-04-21 devnull 
 65 28994509 2004-04-21 devnull 	if ((array = calloc(sizeof(Rawimage * ), 2)) == nil)
 66 28994509 2004-04-21 devnull 		sysfatal("no memory");
 67 28994509 2004-04-21 devnull 	array[0] = a;
 68 28994509 2004-04-21 devnull 	array[1] = nil;
 69 28994509 2004-04-21 devnull 
 70 28994509 2004-04-21 devnull 	if ((d = dirfstat(Bfildes(bp))) != nil) {
 71 28994509 2004-04-21 devnull 		sz = d->length;
 72 28994509 2004-04-21 devnull 		free(d);
 73 28994509 2004-04-21 devnull 	} else {
 74 28994509 2004-04-21 devnull 		fprint(2, "cannot stat input, assuming 720x576x10bit\n");
 75 28994509 2004-04-21 devnull 		sz = 720 * PAL * 2L + (720 * PAL / 2L);
 76 28994509 2004-04-21 devnull 	}
 77 28994509 2004-04-21 devnull 
 78 28994509 2004-04-21 devnull 	switch (sz) {
 79 cbeb0b26 2006-04-01 devnull 	case 720 * PAL * 2:				/* 625 x 8bit */
 80 28994509 2004-04-21 devnull 		bits = 8;
 81 28994509 2004-04-21 devnull 		lines = PAL;
 82 28994509 2004-04-21 devnull 		break;
 83 cbeb0b26 2006-04-01 devnull 	case 720 * NTSC * 2:				/* 525 x 8bit */
 84 28994509 2004-04-21 devnull 		bits = 8;
 85 28994509 2004-04-21 devnull 		lines = NTSC;
 86 28994509 2004-04-21 devnull 		break;
 87 cbeb0b26 2006-04-01 devnull 	case 720 * PAL * 2 + (720 * PAL / 2) :		/* 625 x 10bit */
 88 28994509 2004-04-21 devnull 			bits = 10;
 89 28994509 2004-04-21 devnull 		lines = PAL;
 90 28994509 2004-04-21 devnull 		break;
 91 cbeb0b26 2006-04-01 devnull 	case 720 * NTSC * 2 + (720 * NTSC / 2) :	/* 525 x 10bit */
 92 28994509 2004-04-21 devnull 			bits = 10;
 93 28994509 2004-04-21 devnull 		lines = NTSC;
 94 28994509 2004-04-21 devnull 		break;
 95 28994509 2004-04-21 devnull 	default:
 96 28994509 2004-04-21 devnull 		e = "unknown file size";
 97 28994509 2004-04-21 devnull 		goto Error;
 98 28994509 2004-04-21 devnull 	}
 99 28994509 2004-04-21 devnull 
100 cbeb0b26 2006-04-01 devnull 	/*	print("bits=%d pixels=%d lines=%d\n", bits, 720, lines); */
101 cbeb0b26 2006-04-01 devnull 	/* */
102 28994509 2004-04-21 devnull 	a->nchans = 3;
103 28994509 2004-04-21 devnull 	a->chandesc = CRGB;
104 28994509 2004-04-21 devnull 	a->chanlen = 720 * lines;
105 28994509 2004-04-21 devnull 	a->r = Rect(0, 0, 720, lines);
106 28994509 2004-04-21 devnull 
107 28994509 2004-04-21 devnull 	e = "no memory";
108 28994509 2004-04-21 devnull 	if ((frm = malloc(720 * 2 * lines * sizeof(ushort))) == nil)
109 28994509 2004-04-21 devnull 		goto Error;
110 28994509 2004-04-21 devnull 
111 28994509 2004-04-21 devnull 	for (c = 0; c  < 3; c++)
112 28994509 2004-04-21 devnull 		if ((a->chans[c] = malloc(720 * lines)) == nil)
113 28994509 2004-04-21 devnull 			goto Error;
114 28994509 2004-04-21 devnull 
115 28994509 2004-04-21 devnull 	e = "read file";
116 28994509 2004-04-21 devnull 	for (l = 0; l < lines; l++) {
117 28994509 2004-04-21 devnull 		if (Bread(bp, buf, 720 * 2) == -1)
118 28994509 2004-04-21 devnull 			goto Error;
119 28994509 2004-04-21 devnull 
120 28994509 2004-04-21 devnull 		base = l * 720 * 2;
121 28994509 2004-04-21 devnull 		for (w = 0; w < 720 * 2; w++)
122 28994509 2004-04-21 devnull 			frm[base + w] = ((ushort)buf[w]) << 2;
123 28994509 2004-04-21 devnull 	}
124 28994509 2004-04-21 devnull 
125 28994509 2004-04-21 devnull 
126 28994509 2004-04-21 devnull 	if (bits == 10)
127 28994509 2004-04-21 devnull 		for (l = 0; l < lines; l++) {
128 28994509 2004-04-21 devnull 			if (Bread(bp, buf, 720 / 2) == -1)
129 28994509 2004-04-21 devnull 				goto Error;
130 28994509 2004-04-21 devnull 
131 28994509 2004-04-21 devnull 
132 28994509 2004-04-21 devnull 			base = l * 720 * 2;
133 28994509 2004-04-21 devnull 			for (w = 0; w < 720 * 2; w++)
134 28994509 2004-04-21 devnull 				frm[base + w] |= buf[w / 4] >> lsbtab[w % 4];
135 28994509 2004-04-21 devnull 		}
136 28994509 2004-04-21 devnull 
137 28994509 2004-04-21 devnull 	mux = frm;
138 28994509 2004-04-21 devnull 	end = frm + 720 * lines * 2;
139 28994509 2004-04-21 devnull 	r = a->chans[0];
140 28994509 2004-04-21 devnull 	g = a->chans[1];
141 28994509 2004-04-21 devnull 	b = a->chans[2];
142 28994509 2004-04-21 devnull 
143 28994509 2004-04-21 devnull 	while (mux < end) {
144 28994509 2004-04-21 devnull 		cb = *mux++ - 512;
145 28994509 2004-04-21 devnull 		y1 = (*mux++ - 64) * 76310;
146 28994509 2004-04-21 devnull 		cr = *mux++ - 512;
147 28994509 2004-04-21 devnull 		y2 = (*mux++ - 64) * 76310;
148 28994509 2004-04-21 devnull 
149 28994509 2004-04-21 devnull 		*r++ = clip((104635 * cr) + y1);
150 28994509 2004-04-21 devnull 		*g++ = clip((-25690 * cb + -53294 * cr) + y1);
151 28994509 2004-04-21 devnull 		*b++ = clip((132278 * cb) + y1);
152 28994509 2004-04-21 devnull 
153 28994509 2004-04-21 devnull 		*r++ = clip((104635 * cr) + y2);
154 28994509 2004-04-21 devnull 		*g++ = clip((-25690 * cb + -53294 * cr) + y2);
155 28994509 2004-04-21 devnull 		*b++ = clip((132278 * cb) + y2);
156 28994509 2004-04-21 devnull 	}
157 28994509 2004-04-21 devnull 	free(frm);
158 28994509 2004-04-21 devnull 	return array;
159 28994509 2004-04-21 devnull 
160 28994509 2004-04-21 devnull Error:
161 28994509 2004-04-21 devnull 
162 28994509 2004-04-21 devnull 	errstr(ebuf, sizeof ebuf);
163 28994509 2004-04-21 devnull 	if (ebuf[0] == 0)
164 28994509 2004-04-21 devnull 		strcpy(ebuf, e);
165 28994509 2004-04-21 devnull 	errstr(ebuf, sizeof ebuf);
166 28994509 2004-04-21 devnull 
167 28994509 2004-04-21 devnull 	for (c = 0; c < 3; c++)
168 28994509 2004-04-21 devnull 		free(a->chans[c]);
169 28994509 2004-04-21 devnull 	free(a->cmap);
170 28994509 2004-04-21 devnull 	free(array[0]);
171 28994509 2004-04-21 devnull 	free(array);
172 28994509 2004-04-21 devnull 	free(frm);
173 28994509 2004-04-21 devnull 	return nil;
174 28994509 2004-04-21 devnull }
175 28994509 2004-04-21 devnull 
176 28994509 2004-04-21 devnull 
177 28994509 2004-04-21 devnull Rawimage**
178 28994509 2004-04-21 devnull readyuv(int fd, int colorspace)
179 28994509 2004-04-21 devnull {
180 28994509 2004-04-21 devnull 	Rawimage * *a;
181 28994509 2004-04-21 devnull 	Biobuf b;
182 28994509 2004-04-21 devnull 
183 28994509 2004-04-21 devnull 	if (Binit(&b, fd, OREAD) < 0)
184 28994509 2004-04-21 devnull 		return nil;
185 28994509 2004-04-21 devnull 	a = Breadyuv(&b, colorspace);
186 28994509 2004-04-21 devnull 	Bterm(&b);
187 28994509 2004-04-21 devnull 	return a;
188 28994509 2004-04-21 devnull }