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/* test_sec_ne.c - Test for Not-Equal section filters.
* usage: DEMUX=/dev/dvb/adapterX/demuxX test_sec_ne pid [tid [tid_ext]]
*
* 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
static unsigned int version_number;
void usage(void)
{
fprintf(stderr, "usage: test_sec_ne pid [tid [tid_ext]]\n");
fprintf(stderr, " Read the version_number from the first section\n");
fprintf(stderr, " and sec a filter to wait for it to change.\n");
fprintf(stderr, " The default demux device used can be changed\n");
fprintf(stderr, " using the DEMUX environment variable;\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 (bytes != ETIMEDOUT)
exit(1);
}
hex_dump(buf, bytes);
version_number = ((buf[5] >> 1) & 0x1f);
printf("current version_number: %u\n\n", version_number);
}
int set_filter(int fd, unsigned int pid, unsigned int tid,
unsigned int tid_ext, unsigned int _version_number)
{
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;
if (tid < 0x100) {
f.filter.filter[0] = (uint8_t) tid;
f.filter.mask[0] = 0xff;
}
if (tid_ext < 0x10000) {
f.filter.filter[1] = (uint8_t) (tid_ext >> 8);
f.filter.filter[2] = (uint8_t) (tid_ext & 0xff);
f.filter.mask[1] = 0xff;
f.filter.mask[2] = 0xff;
}
if (_version_number < 0x20) {
f.filter.filter[3] = (uint8_t) (_version_number << 1);
f.filter.mask[3] = 0x3e;
f.filter.mode[3] = 0x3e;
}
f.timeout = 0;
f.flags = DMX_IMMEDIATE_START;
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, tid_ext;
char * dmxdev = "/dev/dvb/adapter0/demux0";
if (argc < 2 || argc > 4)
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) {
tid_ext = strtoul(argv[3], NULL, 0);
if (tid_ext > 0xffff)
usage();
} else
tid_ext = 0x10000;
if (getenv("DEMUX"))
dmxdev = getenv("DEMUX");
fprintf(stderr, "test_sec_ne: using '%s'\n", dmxdev);
fprintf(stderr, " PID 0x%04lx\n", pid);
if (tid < 0x100)
fprintf(stderr, " TID 0x%02lx\n", tid);
if (tid_ext < 0x10000)
fprintf(stderr, " TID EXT 0x%04lx\n", tid_ext);
if ((dmxfd = open(dmxdev, O_RDWR)) < 0){
perror("open");
return 1;
}
if (set_filter(dmxfd, pid, tid, tid_ext, 0xff) != 0)
return 1;
process_section(dmxfd);
while (1) {
if (set_filter(dmxfd, pid, tid, tid_ext, version_number) != 0)
return 1;
process_section(dmxfd);
}
for (;;) {
process_section(dmxfd);
}
close(dmxfd);
return 0;
}
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