mirror of
https://github.com/outbackdingo/UltraGrid.git
synced 2026-03-21 17:40:23 +00:00
0a57fc4faf
* format is now entered as a parameter string (-g <mode>) * expect currently buffers as big as needed (exactly one frame) TODO: revide if isn't possible to read whole buffer at once (ideally the memmapped one, and extract frames by hand) * now it is needed to set /sys/class/sdivideo/sdivideorxX/bufsize * bump to new driver (2.7.2)
283 lines
7.6 KiB
C
283 lines
7.6 KiB
C
/* cknull.c
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*
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* MPEG-2 transport stream testing utility.
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*
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* Copyright (C) 2001-2009 Linear Systems Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of Linear Systems Ltd. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY LINEAR SYSTEMS LTD. "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL LINEAR SYSTEMS LTD. OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Linear Systems can be contacted at <http://www.linsys.ca/>.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "master.h"
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#include "../util.h"
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#ifndef _LFS_LARGEFILE
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#error Large file support not found
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#endif
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static const char progname[] = "cknull";
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int
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main (int argc, char **argv)
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{
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int opt, fd, i, retcode;
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int started, packetbyte, packetnum, packetsize;
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unsigned long long int bytes;
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unsigned char *data;
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while ((opt = getopt (argc, argv, "hV")) != -1) {
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switch (opt) {
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case 'h':
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printf ("Usage: %s [OPTION]... [FILE]\n", argv[0]);
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printf ("Test FILE or standard input "
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"for null MPEG-2 transport stream packets\n"
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"with an ascending continuity_counter "
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"and a payload of 0xff.\n\n");
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printf (" -h\tdisplay this help and exit\n");
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printf (" -V\toutput version information and exit\n");
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printf ("\nReport bugs to <support@linsys.ca>.\n");
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return 0;
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case 'V':
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printf ("%s from master-%s (%s)\n", progname,
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MASTER_DRIVER_VERSION,
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MASTER_DRIVER_DATE);
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printf ("\nCopyright (C) 2001-2009 "
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"Linear Systems Ltd.\n"
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"This is free software; "
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"see the source for copying conditions. "
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"There is NO\n"
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"warranty; not even for MERCHANTABILITY "
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"or FITNESS FOR A PARTICULAR PURPOSE.\n");
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return 0;
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case '?':
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goto USAGE;
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}
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}
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/* Check the number of arguments */
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if ((argc - optind) > 1) {
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fprintf (stderr, "%s: extra operand\n", argv[0]);
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goto USAGE;
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}
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/* Open the input file */
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fd = STDIN_FILENO;
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if (argc - optind) {
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if ((fd = open (argv[optind], O_RDONLY, 0)) < 0) {
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fprintf (stderr, "%s: ", argv[0]);
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perror ("unable to open file for reading");
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return -1;
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}
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}
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/* Allocate some memory */
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if ((data = (unsigned char *)malloc (BUFSIZ)) == NULL) {
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fprintf (stderr, "%s: unable to allocate memory\n", argv[0]);
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goto NO_DATA;
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}
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started = 0;
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packetbyte = 0;
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packetnum = 0;
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packetsize = 0;
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bytes = 0;
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while ((retcode = read (fd, data, BUFSIZ))) {
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if (retcode < 0) {
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fprintf (stderr, "%s: ", argv[0]);
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perror ("unable to read from file");
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goto NO_READ;
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}
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i = 0;
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/* Search for the first packet and get the
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* packet size and continuity_counter value. */
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while ((!started) && (i < retcode)) {
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if (packetbyte == 0) {
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if ((data[i] == 0x47) || (data[i] == 0xB8)) {
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packetbyte++;
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} else {
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fprinttime (stdout, progname);
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printf ("packet not found at "
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"byte %llu\n", bytes);
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}
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} else if (packetbyte == 1) {
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if (data[i] == 0x1f) {
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packetbyte++;
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} else {
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packetbyte = 0;
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fprinttime (stdout, progname);
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printf ("header error at "
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"byte %llu\n", bytes);
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}
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} else if (packetbyte == 2) {
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if (data[i] == 0xff) {
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packetbyte++;
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} else {
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packetbyte = 0;
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fprinttime (stdout, progname);
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printf ("header error at "
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"byte %llu\n", bytes);
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}
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} else if (packetbyte == 3) {
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if ((data[i] & 0xf0) == 0x10) {
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packetbyte++;
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packetnum = ((data[i] & 0x0f) + 1) %
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16;
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} else {
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packetbyte = 0;
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fprinttime (stdout, progname);
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printf ("header error at "
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"byte %llu\n", bytes);
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}
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} else if ((packetbyte >= 4) && (packetbyte < 188)) {
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if (data[i] == 0xff) {
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packetbyte++;
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} else {
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packetbyte = 0;
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fprinttime (stdout, progname);
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printf ("payload error at "
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"byte %llu\n", bytes);
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}
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} else if (packetbyte == 188) {
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if ((data[i] == 0x47) || (data[i] == 0xB8)) {
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packetbyte = 1;
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packetsize = 188;
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started = 1;
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} else if (data[i] == 0x00) {
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packetbyte++;
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} else {
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packetbyte = 0;
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fprinttime (stdout, progname);
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printf ("payload error at "
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"byte %llu\n", bytes);
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}
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} else if ((packetbyte > 188) && (packetbyte < 204)) {
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if (data[i] == 0x00) {
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packetbyte++;
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} else {
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packetbyte = 0;
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fprinttime (stdout, progname);
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printf ("payload error at "
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"byte %llu\n", bytes);
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}
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} else {
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if ((data[i] == 0x47) || (data[i] == 0xB8)) {
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packetbyte = 1;
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packetsize = 204;
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started = 1;
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} else {
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packetbyte = 0;
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fprinttime (stdout, progname);
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printf ("invalid packet length at "
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"byte %llu\n", bytes);
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}
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}
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i++;
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bytes++;
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}
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/* Test all packets after the first,
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* assuming the packet size is the same as the first. */
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while (started && (i < retcode)) {
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if ((packetbyte >= 4) && (packetbyte < 188)) {
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if (data[i] != 0xff) {
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fprinttime (stdout, progname);
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printf ("payload error at "
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"byte %llu\n", bytes);
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}
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packetbyte++;
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} else if (packetbyte == packetsize) {
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if ((data[i] != 0x47) && (data[i] != 0xB8)) {
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fprinttime (stdout, progname);
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printf ("packet not found at "
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"byte %llu\n", bytes);
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} else {
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packetbyte = 1;
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}
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} else if (packetbyte == 1) {
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if (data[i] != 0x1f) {
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fprinttime (stdout, progname);
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printf ("header error at "
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"byte %llu\n", bytes);
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}
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packetbyte++;
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} else if (packetbyte == 2) {
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if (data[i] != 0xff) {
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fprinttime (stdout, progname);
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printf ("header error at "
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"byte %llu\n", bytes);
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}
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packetbyte++;
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} else if (packetbyte == 3) {
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if ((data[i] & 0xf0) != 0x10) {
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fprinttime (stdout, progname);
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printf ("header error at "
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"byte %llu\n", bytes);
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} else if ((data[i] & 0x0f) != packetnum) {
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fprinttime (stdout, progname);
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printf ("sequence error at "
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"byte %llu\n", bytes);
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}
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packetbyte++;
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packetnum = ((data[i] & 0x0f) + 1) % 16;
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} else if ((packetbyte >= 188) && (packetbyte < 204)) {
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if (data[i] != 0x00) {
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fprinttime (stdout, progname);
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printf ("payload error at "
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"byte %llu\n", bytes);
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}
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packetbyte++;
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}
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i++;
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bytes++;
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}
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}
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free (data);
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if (argc - optind) {
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close (fd);
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}
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return 0;
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USAGE:
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fprintf (stderr, "Try '%s -h' for more information.\n", argv[0]);
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return -1;
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NO_READ:
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free (data);
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NO_DATA:
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if (argc - optind) {
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close (fd);
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}
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return -1;
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}
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