audiostuff: spandsp-0.0.3/spandsp-0.0.3/tests/t4

comparison spandsp-0.0.3/spandsp-0.0.3/tests/t4_tests.c @ 5:f762bf195c4b

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

-:26cd8f1ef0b1
+:f762bf195c4b
+/*
+* SpanDSP - a series of DSP components for telephony
+*
+* t4_tests.c - ITU T.4 FAX image to and from TIFF file tests
+*
+* Written by Steve Underwood <steveu@coppice.org>
+*
+* Copyright (C) 2003 Steve Underwood
+*
+* All rights reserved.
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License version 2, as
+* published by the Free Software Foundation.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*
+* $Id: t4_tests.c,v 1.34 2006/11/23 15:48:09 steveu Exp $
+*/
+/*! \file */
+/*! \page t4_tests_page T.4 tests
+\section t4_tests_page_sec_1 What does it do
+These tests exercise the image compression and decompression methods defined
+in ITU specifications T.4 and T.6.
+*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include <memory.h>
+#if defined(HAVE_TGMATH_H)
+#include <tgmath.h>
+#endif
+#if defined(HAVE_MATH_H)
+#include <math.h>
+#endif
+#include <tiffio.h>
+#include "spandsp.h"
+#define IN_FILE_NAME    "../itutests/fax/itutests.tif"
+#define OUT_FILE_NAME   "t4_tests_receive.tif"
+#define XSIZE           1728
+t4_state_t send_state;
+t4_state_t receive_state;
+int main(int argc, char* argv[])
+{
+int sends;
+int page_no;
+int bit;
+int end_of_page;
+int end_marks;
+int i;
+int decode_test;
+int compression;
+int compression_step;
+int add_page_headers;
+int min_row_bits;
+int restart_pages;
+char buf[512];
+t4_stats_t stats;
+const char *in_file_name;
+i = 1;
+decode_test = FALSE;
+compression = -1;
+add_page_headers = FALSE;
+restart_pages = FALSE;
+in_file_name = IN_FILE_NAME;
+min_row_bits = 0;
+while (i < argc)
+{
+if (strcmp(argv[i], "-d") == 0)
+decode_test = TRUE;
+else if (strcmp(argv[i], "-1") == 0)
+compression = T4_COMPRESSION_ITU_T4_1D;
+else if (strcmp(argv[i], "-2") == 0)
+compression = T4_COMPRESSION_ITU_T4_2D;
+else if (strcmp(argv[i], "-6") == 0)
+compression = T4_COMPRESSION_ITU_T6;
+else if (strcmp(argv[i], "-h") == 0)
+add_page_headers = TRUE;
+else if (strcmp(argv[i], "-r") == 0)
+restart_pages = TRUE;
+else if (strcmp(argv[i], "-i") == 0)
+in_file_name = argv[++i];
+else if (strcmp(argv[i], "-m") == 0)
+min_row_bits = atoi(argv[++i]);
+i++;
+}
+/* Create a send and a receive end */
+memset(&send_state, 0, sizeof(send_state));
+memset(&receive_state, 0, sizeof(receive_state));
+if (decode_test)
+{
+if (compression < 0)
+compression = T4_COMPRESSION_ITU_T4_1D;
+/* Receive end puts TIFF to a new file. We assume the receive width here. */
+if (t4_rx_init(&receive_state, OUT_FILE_NAME, T4_COMPRESSION_ITU_T4_2D))
+{
+printf("Failed to init\n");
+exit(2);
+}
+t4_rx_set_rx_encoding(&receive_state, compression);
+t4_rx_set_x_resolution(&receive_state, T4_X_RESOLUTION_R8);
+t4_rx_set_y_resolution(&receive_state, T4_Y_RESOLUTION_FINE);
+t4_rx_set_image_width(&receive_state, XSIZE);
+page_no = 1;
+t4_rx_start_page(&receive_state);
+while (fgets(buf, 511, stdin))
+{
+if (sscanf(buf, "Rx bit %*d - %d", &bit) == 1)
+{
+if ((end_of_page = t4_rx_put_bit(&receive_state, bit)))
+{
+printf("End of page detected\n");
+break;
+}
+}
+}
+#if 0
+/* Dump the entire image as text 'X's and spaces */
+s = receive_state.image_buffer;
+for (i = 0;  i < receive_state.rows;  i++)
+{
+for (j = 0;  j < receive_state.bytes_per_row;  j++)
+{
+for (k = 0;  k < 8;  k++)
+{
+printf((receive_state.image_buffer[i*receive_state.bytes_per_row + j] & (0x80 >> k))  ?  "X"  :  " ");
+}
+}
+printf("\n");
+}
+#endif
+t4_rx_end_page(&receive_state);
+t4_get_transfer_statistics(&receive_state, &stats);
+printf("Pages = %d\n", stats.pages_transferred);
+printf("Image size = %d x %d\n", stats.width, stats.length);
+printf("Image resolution = %d x %d\n", stats.x_resolution, stats.y_resolution);
+printf("Bad rows = %d\n", stats.bad_rows);
+printf("Longest bad row run = %d\n", stats.longest_bad_row_run);
+t4_rx_end(&receive_state);
+}
+else
+{
+/* Send end gets TIFF from a file */
+if (t4_tx_init(&send_state, in_file_name, -1, -1))
+{
+printf("Failed to init TIFF send\n");
+exit(2);
+}
+/* Receive end puts TIFF to a new file. */
+if (t4_rx_init(&receive_state, OUT_FILE_NAME, T4_COMPRESSION_ITU_T4_2D))
+{
+printf("Failed to init\n");
+exit(2);
+}
+t4_tx_set_min_row_bits(&send_state, min_row_bits);
+t4_rx_set_x_resolution(&receive_state, t4_tx_get_x_resolution(&send_state));
+t4_rx_set_y_resolution(&receive_state, t4_tx_get_y_resolution(&send_state));
+t4_rx_set_image_width(&receive_state, t4_tx_get_image_width(&send_state));
+/* Now send and receive all the pages in the source TIFF file */
+page_no = 1;
+t4_tx_set_local_ident(&send_state, "852 2666 0542");
+sends = 0;
+/* Select whether we step round the compression schemes, or use a single specified one. */
+compression_step = (compression < 0)  ?  0  :  -1;
+for (;;)
+{
+end_marks = 0;
+/* Add a header line to alternate pages, if required */
+if (add_page_headers  &&  (sends & 2))
+t4_tx_set_header_info(&send_state, "Header");
+else
+t4_tx_set_header_info(&send_state, NULL);
+if (restart_pages  &&  (sends & 1))
+{
+/* Use restart, to send the page a second time */
+if (t4_tx_restart_page(&send_state))
+break;
+}
+else
+{
+switch (compression_step)
+{
+case 0:
+compression = T4_COMPRESSION_ITU_T4_1D;
+compression_step++;
+break;
+case 1:
+compression = T4_COMPRESSION_ITU_T4_2D;
+compression_step++;
+break;
+case 2:
+compression = T4_COMPRESSION_ITU_T6;
+compression_step = 0;
+break;
+}
+t4_tx_set_tx_encoding(&send_state, compression);
+t4_rx_set_rx_encoding(&receive_state, compression);
+if (t4_tx_start_page(&send_state))
+break;
+}
+t4_rx_start_page(&receive_state);
+do
+{
+bit = t4_tx_get_bit(&send_state);
+#if 0
+if (--next_hit <= 0)
+{
+do
+next_hit = rand() & 0x3FF;
+while (next_hit < 20);
+bit ^= (rand() & 1);
+}
+#endif
+if (bit == PUTBIT_END_OF_DATA)
+{
+/* T.6 data does not contain an image termination sequence.
+T.4 1D and 2D do, and should locate that sequence. */
+if (compression == T4_COMPRESSION_ITU_T6)
+break;
+if (++end_marks > 50)
+{
+printf("Receiver missed the end of page mark\n");
+exit(2);
+}
+}
+end_of_page = t4_rx_put_bit(&receive_state, bit & 1);
+}
+while (!end_of_page);
+t4_get_transfer_statistics(&receive_state, &stats);
+printf("Pages = %d\n", stats.pages_transferred);
+printf("Image size = %d x %d\n", stats.width, stats.length);
+printf("Image resolution = %d x %d\n", stats.x_resolution, stats.y_resolution);
+printf("Bad rows = %d\n", stats.bad_rows);
+printf("Longest bad row run = %d\n", stats.longest_bad_row_run);
+if (!restart_pages  ||  (sends & 1))
+t4_tx_end_page(&send_state);
+t4_rx_end_page(&receive_state);
+sends++;
+}
+/* And we should now have a matching received TIFF file. Note this will only match
+at the image level. TIFF files allow a lot of ways to express the same thing,
+so bit matching of the files is not the normal case. */
+t4_tx_end(&send_state);
+t4_rx_end(&receive_state);
+}
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/

Mercurial > hg > audiostuff

comparison spandsp-0.0.3/spandsp-0.0.3/tests/t4_tests.c @ 5:f762bf195c4b