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/* test_sections.c - Test for section filters.
* usage: DEMUX=/dev/dvb/adapterX/demuxX test_sections [PID [TID]]
*
* Copyright (C) 2002 convergence GmbH
* Johannes Stezenbach <js@convergence.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* 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 Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <linux/dvb/dmx.h>
#include "hex_dump.h"
#define MAX_SECTION_SIZE 8192
#if !defined(DMX_FILTER_SIZE)
#define DMX_FILTER_SIZE 16
#endif
static void parse_filter(unsigned char* filter, const char* filter_desc)
{
int filter_idx;
char* end_ptr;
memset(filter, '\0', DMX_FILTER_SIZE);
for (filter_idx = 1; /* Leave first byte for tid */
filter_idx < DMX_FILTER_SIZE-1; ++filter_idx) {
filter[filter_idx] = strtoul(filter_desc, &end_ptr, 0);
if (*end_ptr == '\0' || end_ptr == filter_desc)
break;
filter_desc = end_ptr;
}
}
void usage(void)
{
fprintf(stderr, "usage: test_sections PID [TID] [FILTER] [MASK]\n");
fprintf(stderr, " The default demux device used can be changed\n");
fprintf(stderr, " using the DEMUX environment variable;\n");
fprintf(stderr, " set env BUFFER to play with DMX_SET_BUFFER_SIZE\n");
fprintf(stderr, "\n");
fprintf(stderr, " The optional filter and mask may be used to filter on\n");
fprintf(stderr, " additional bytes. These bytes may be given in hex or dec\n");
fprintf(stderr, " separated by spaces (hint: you may have to use quotes around\n");
fprintf(stderr, " FILTER and MASK). TID is always the first byte of the filter,\n");
fprintf(stderr, " and the first byte from FILTER applies to byte 3 of the section\n");
fprintf(stderr, " data (i.e. the first byte after the section length)\n");
exit(1);
}
void process_section(int fd)
{
uint8_t buf[MAX_SECTION_SIZE];
int bytes;
bytes = read(fd, buf, sizeof(buf));
if (bytes < 0) {
perror("read");
if (errno != EOVERFLOW)
exit(1);
}
hex_dump(buf, bytes);
printf("\n");
}
int set_filter(int fd, unsigned int pid,
const unsigned char* filter, const unsigned char* mask)
{
struct dmx_sct_filter_params f;
unsigned long bufsz;
if (getenv("BUFFER")) {
bufsz=strtoul(getenv("BUFFER"), NULL, 0);
if (bufsz > 0 && bufsz <= MAX_SECTION_SIZE) {
fprintf(stderr, "DMX_SET_BUFFER_SIZE %lu\n", bufsz);
if (ioctl(fd, DMX_SET_BUFFER_SIZE, bufsz) == -1) {
perror("DMX_SET_BUFFER_SIZE");
return 1;
}
}
}
memset(&f.filter, 0, sizeof(struct dmx_filter));
f.pid = (uint16_t) pid;
memcpy(f.filter.filter, filter, DMX_FILTER_SIZE);
memcpy(f.filter.mask, mask, DMX_FILTER_SIZE);
f.timeout = 0;
f.flags = DMX_IMMEDIATE_START | DMX_CHECK_CRC;
if (ioctl(fd, DMX_SET_FILTER, &f) == -1) {
perror("DMX_SET_FILTER");
return 1;
}
return 0;
}
int main(int argc, char *argv[])
{
int dmxfd;
unsigned long pid, tid;
char * dmxdev = "/dev/dvb/adapter0/demux0";
unsigned char filter[DMX_FILTER_SIZE];
unsigned char mask[DMX_FILTER_SIZE];
int filter_idx;
if (argc < 2 || argc > 5)
usage();
pid = strtoul(argv[1], NULL, 0);
if (pid > 0x1fff)
usage();
if (argc > 2) {
tid = strtoul(argv[2], NULL, 0);
if (tid > 0xff)
usage();
} else
tid = 0x100;
if (argc > 3)
parse_filter(filter, argv[3]);
else
memset(filter, '\0', sizeof(filter));
if (argc > 4)
parse_filter(mask, argv[4]);
else
memset(mask, '\0', sizeof(mask));
if (tid < 0x100) {
filter[0] = tid;
mask[0] = 0xff;
}
if (getenv("DEMUX"))
dmxdev = getenv("DEMUX");
fprintf(stderr, "test_sections: using '%s'\n", dmxdev);
fprintf(stderr, " PID 0x%04lx\n", pid);
if (tid < 0x100)
fprintf(stderr, " TID 0x%02lx\n", tid);
fprintf(stderr, " Filter ");
for (filter_idx = 0; filter_idx < DMX_FILTER_SIZE; ++filter_idx)
fprintf(stderr, "0x%.2x ", filter[filter_idx]);
fprintf(stderr, "\n");
fprintf(stderr, " Mask ");
for (filter_idx = 0; filter_idx < DMX_FILTER_SIZE; ++filter_idx)
fprintf(stderr, "0x%.2x ", mask[filter_idx]);
fprintf(stderr, "\n");
if ((dmxfd = open(dmxdev, O_RDWR)) < 0){
perror("open");
return 1;
}
if (set_filter(dmxfd, pid, filter, mask) != 0)
return 1;
for (;;) {
process_section(dmxfd);
}
close(dmxfd);
return 0;
}
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