Mercurial > hg > audiostuff

comparison spandsp-0.0.3/spandsp-0.0.3/itutests/fax/generate_dithered_tif.c @ 5:f762bf195c4b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
import spandsp-0.0.3
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Fri, 25 Jun 2010 16:00:21 +0200
parents
children
comparison
equal deleted inserted replaced
4:26cd8f1ef0b1 5:f762bf195c4b
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 1.3 2006/11/20 00:00:27 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 #ifdef HAVE_CONFIG_H
42 #include "config.h"
43 #endif
44
45 #define _GNU_SOURCE
46
47 #include <stdio.h>
48 #include <inttypes.h>
49 #include <limits.h>
50 #include <unistd.h>
51 #include <fcntl.h>
52 #include <stdlib.h>
53 #include <time.h>
54 #include <memory.h>
55 #include <string.h>
56 #if defined(HAVE_TGMATH_H)
57 #include <tgmath.h>
58 #endif
59 #if defined(HAVE_MATH_H)
60 #include <math.h>
61 #endif
62 #include <tiffio.h>
63
64 #define T4_X_RESOLUTION_R4 4019
65 #define T4_X_RESOLUTION_R8 8037
66 #define T4_X_RESOLUTION_R16 16074
67
68 #define T4_Y_RESOLUTION_STANDARD 3850
69 #define T4_Y_RESOLUTION_FINE 7700
70 #define T4_Y_RESOLUTION_SUPERFINE 15400
71
72 int main(int argc, char *argv[])
73 {
74 int image_width;
75 int row;
76 int resunit;
77 int output_compression;
78 int output_t4_options;
79 uint8_t image_buffer[1024];
80 TIFF *tiff_file;
81 struct tm *tm;
82 time_t now;
83 char buf[133];
84 float x_resolution;
85 float y_resolution;
86 int x_res;
87 int y_res;
88 int image_length;
89
90 if ((tiff_file = TIFFOpen("dithered.tif", "w")) == NULL)
91 exit(2);
92
93 output_compression = COMPRESSION_CCITT_T4;
94 /* Use 1-D compression until a fixed libtiff is the norm. */
95 //output_t4_options = GROUP3OPT_FILLBITS | GROUP3OPT_2DENCODING;
96 output_t4_options = GROUP3OPT_FILLBITS;
97
98 x_res = T4_X_RESOLUTION_R8;
99 y_res = T4_Y_RESOLUTION_FINE;
100 image_width = 1728;
101 image_length = 2200;
102
103 /* Prepare the directory entry fully before writing the image, or libtiff complains */
104 TIFFSetField(tiff_file, TIFFTAG_COMPRESSION, output_compression);
105 if (output_compression == COMPRESSION_CCITT_T4)
106 {
107 TIFFSetField(tiff_file, TIFFTAG_T4OPTIONS, output_t4_options);
108 TIFFSetField(tiff_file, TIFFTAG_FAXMODE, FAXMODE_CLASSF);
109 }
110 TIFFSetField(tiff_file, TIFFTAG_IMAGEWIDTH, image_width);
111 TIFFSetField(tiff_file, TIFFTAG_BITSPERSAMPLE, 1);
112 TIFFSetField(tiff_file, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
113 TIFFSetField(tiff_file, TIFFTAG_SAMPLESPERPIXEL, 1);
114 TIFFSetField(tiff_file, TIFFTAG_ROWSPERSTRIP, -1L);
115 TIFFSetField(tiff_file, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
116 TIFFSetField(tiff_file, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISWHITE);
117 TIFFSetField(tiff_file, TIFFTAG_FILLORDER, FILLORDER_LSB2MSB);
118
119 x_resolution = x_res/100.0f;
120 y_resolution = y_res/100.0f;
121 TIFFSetField(tiff_file, TIFFTAG_XRESOLUTION, floorf(x_resolution*2.54f + 0.5f));
122 TIFFSetField(tiff_file, TIFFTAG_YRESOLUTION, floorf(y_resolution*2.54f + 0.5f));
123 resunit = RESUNIT_INCH;
124 TIFFSetField(tiff_file, TIFFTAG_RESOLUTIONUNIT, resunit);
125
126 TIFFSetField(tiff_file, TIFFTAG_SOFTWARE, "spandsp");
127 if (gethostname(buf, sizeof(buf)) == 0)
128 TIFFSetField(tiff_file, TIFFTAG_HOSTCOMPUTER, buf);
129
130 TIFFSetField(tiff_file, TIFFTAG_IMAGEDESCRIPTION, "Checkerboard or dithered ones");
131 TIFFSetField(tiff_file, TIFFTAG_MAKE, "soft-switch.org");
132 TIFFSetField(tiff_file, TIFFTAG_MODEL, "test data");
133
134 time(&now);
135 tm = localtime(&now);
136 sprintf(buf,
137 "%4d/%02d/%02d %02d:%02d:%02d",
138 tm->tm_year + 1900,
139 tm->tm_mon + 1,
140 tm->tm_mday,
141 tm->tm_hour,
142 tm->tm_min,
143 tm->tm_sec);
144 TIFFSetField(tiff_file, TIFFTAG_DATETIME, buf);
145
146 TIFFSetField(tiff_file, TIFFTAG_IMAGELENGTH, image_length);
147 TIFFSetField(tiff_file, TIFFTAG_PAGENUMBER, 0, 1);
148 TIFFSetField(tiff_file, TIFFTAG_CLEANFAXDATA, CLEANFAXDATA_CLEAN);
149 TIFFSetField(tiff_file, TIFFTAG_IMAGEWIDTH, image_width);
150
151 /* Write the image first.... */
152 for (row = 0; row < image_length; row++)
153 {
154 if ((row & 1) == 0)
155 memset(image_buffer, 0xAA, image_width/8 + 1);
156 else
157 memset(image_buffer, 0x55, image_width/8 + 1);
158 if (TIFFWriteScanline(tiff_file, image_buffer, row, 0) < 0)
159 {
160 printf("Write error at row %d.\n", row);
161 exit(2);
162 }
163 }
164 /* ....then the directory entry, and libtiff is happy. */
165 TIFFWriteDirectory(tiff_file);
166 TIFFClose(tiff_file);
167 return 0;
168 }
169 /*- End of function --------------------------------------------------------*/
170 /*- End of file ------------------------------------------------------------*/

Repositories maintained by Peter Meerwald, pmeerw@pmeerw.net.