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comparison spandsp-0.0.6pre17/test-data/itu/fax/generate_dithered_tif.c @ 4:26cd8f1ef0b1

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import spandsp-0.0.6pre17
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Fri, 25 Jun 2010 15:50:58 +0200
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3:c6c5a16ce2f2 4:26cd8f1ef0b1
1 /*
2 * SpanDSP - a series of DSP components for telephony
3 *
4 * generate_dithered_tif.c - Create a fine checkerboard TIFF file for test purposes.
5 *
6 * Written by Steve Underwood <steveu@coppice.org>
7 *
8 * Copyright (C) 2006 Steve Underwood
9 *
10 * All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2, as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 * $Id: generate_dithered_tif.c,v 1.2 2008/07/10 13:34:01 steveu Exp $
26 */
27
28 /*! \file */
29
30 /*
31 This program generates an A4 sized FAX image of a fine checkerboard. This doesn't
32 compress well, so it results in a rather large file for a single page. This is
33 good for testing the handling of extreme pages.
34
35 Note that due to a bug in FAX image handling, versions of libtiff up to 3.8.2 fail
36 to handle this complex image properly, if 2-D compression is used. The bug should
37 be fixed in CVS at the time of writing, and so should be fixed in released versions
38 after 3.8.2. This code uses 1-D compression to avoid the issue.
39 */
40
41 #if defined(HAVE_CONFIG_H)
42 #include "config.h"
43 #endif
44
45 #include <stdio.h>
46 #include <inttypes.h>
47 #include <limits.h>
48 #include <unistd.h>
49 #include <fcntl.h>
50 #include <stdlib.h>
51 #include <time.h>
52 #include <memory.h>
53 #include <string.h>
54 #if defined(HAVE_TGMATH_H)
55 #include <tgmath.h>
56 #endif
57 #if defined(HAVE_MATH_H)
58 #include <math.h>
59 #endif
60 #include <tiffio.h>
61
62 #include "spandsp.h"
63
64 int main(int argc, char *argv[])
65 {
66 int image_width;
67 int row;
68 int resunit;
69 int output_compression;
70 int output_t4_options;
71 uint8_t image_buffer[1024];
72 TIFF *tiff_file;
73 struct tm *tm;
74 time_t now;
75 char buf[133];
76 float x_resolution;
77 float y_resolution;
78 int x_res;
79 int y_res;
80 int image_length;
81
82 if ((tiff_file = TIFFOpen("dithered.tif", "w")) == NULL)
83 exit(2);
84
85 output_compression = COMPRESSION_CCITT_T4;
86 /* Use 1-D compression until a fixed libtiff is the norm. */
87 //output_t4_options = GROUP3OPT_FILLBITS | GROUP3OPT_2DENCODING;
88 output_t4_options = GROUP3OPT_FILLBITS;
89
90 x_res = T4_X_RESOLUTION_R8;
91 y_res = T4_Y_RESOLUTION_FINE;
92 image_width = 1728;
93 image_length = 2200;
94
95 /* Prepare the directory entry fully before writing the image, or libtiff complains */
96 TIFFSetField(tiff_file, TIFFTAG_COMPRESSION, output_compression);
97 if (output_compression == COMPRESSION_CCITT_T4)
98 {
99 TIFFSetField(tiff_file, TIFFTAG_T4OPTIONS, output_t4_options);
100 TIFFSetField(tiff_file, TIFFTAG_FAXMODE, FAXMODE_CLASSF);
101 }
102 TIFFSetField(tiff_file, TIFFTAG_IMAGEWIDTH, image_width);
103 TIFFSetField(tiff_file, TIFFTAG_BITSPERSAMPLE, 1);
104 TIFFSetField(tiff_file, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
105 TIFFSetField(tiff_file, TIFFTAG_SAMPLESPERPIXEL, 1);
106 TIFFSetField(tiff_file, TIFFTAG_ROWSPERSTRIP, -1L);
107 TIFFSetField(tiff_file, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
108 TIFFSetField(tiff_file, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISWHITE);
109 TIFFSetField(tiff_file, TIFFTAG_FILLORDER, FILLORDER_LSB2MSB);
110
111 x_resolution = x_res/100.0f;
112 y_resolution = y_res/100.0f;
113 TIFFSetField(tiff_file, TIFFTAG_XRESOLUTION, floorf(x_resolution*2.54f + 0.5f));
114 TIFFSetField(tiff_file, TIFFTAG_YRESOLUTION, floorf(y_resolution*2.54f + 0.5f));
115 resunit = RESUNIT_INCH;
116 TIFFSetField(tiff_file, TIFFTAG_RESOLUTIONUNIT, resunit);
117
118 TIFFSetField(tiff_file, TIFFTAG_SOFTWARE, "spandsp");
119 if (gethostname(buf, sizeof(buf)) == 0)
120 TIFFSetField(tiff_file, TIFFTAG_HOSTCOMPUTER, buf);
121
122 TIFFSetField(tiff_file, TIFFTAG_IMAGEDESCRIPTION, "Checkerboard or dithered ones");
123 TIFFSetField(tiff_file, TIFFTAG_MAKE, "soft-switch.org");
124 TIFFSetField(tiff_file, TIFFTAG_MODEL, "test data");
125
126 time(&now);
127 tm = localtime(&now);
128 sprintf(buf,
129 "%4d/%02d/%02d %02d:%02d:%02d",
130 tm->tm_year + 1900,
131 tm->tm_mon + 1,
132 tm->tm_mday,
133 tm->tm_hour,
134 tm->tm_min,
135 tm->tm_sec);
136 TIFFSetField(tiff_file, TIFFTAG_DATETIME, buf);
137
138 TIFFSetField(tiff_file, TIFFTAG_IMAGELENGTH, image_length);
139 TIFFSetField(tiff_file, TIFFTAG_PAGENUMBER, 0, 1);
140 TIFFSetField(tiff_file, TIFFTAG_CLEANFAXDATA, CLEANFAXDATA_CLEAN);
141 TIFFSetField(tiff_file, TIFFTAG_IMAGEWIDTH, image_width);
142
143 /* Write the image first.... */
144 for (row = 0; row < image_length; row++)
145 {
146 if ((row & 1) == 0)
147 memset(image_buffer, 0xAA, image_width/8 + 1);
148 else
149 memset(image_buffer, 0x55, image_width/8 + 1);
150 if (TIFFWriteScanline(tiff_file, image_buffer, row, 0) < 0)
151 {
152 printf("Write error at row %d.\n", row);
153 exit(2);
154 }
155 }
156 /* ....then the directory entry, and libtiff is happy. */
157 TIFFWriteDirectory(tiff_file);
158 TIFFClose(tiff_file);
159 return 0;
160 }
161 /*- End of function --------------------------------------------------------*/
162 /*- End of file ------------------------------------------------------------*/

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