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/* test_pes.c - Test for PES filters.
* usage: DEMUX=/dev/dvb/adapterX/demuxX test_pes PID
*
* 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 <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_PES_SIZE (4*1024)
void usage(void)
{
fprintf(stderr, "usage: test_pes PID [filename]\n");
fprintf(stderr, " Print a hexdump of PES packets from PID to stdout.\n");
fprintf(stderr, " filename : Write binary PES data to file (no hexdump).\n");
fprintf(stderr, " The default demux device used can be changed\n");
fprintf(stderr, " using the DEMUX environment variable\n");
exit(1);
}
void process_pes(int fd, FILE *out)
{
uint8_t buf[MAX_PES_SIZE];
int bytes;
bytes = read(fd, buf, sizeof(buf));
if (bytes < 0) {
if (errno == EOVERFLOW) {
fprintf(stderr, "read error: buffer overflow (%d)\n",
EOVERFLOW);
return;
}
else {
perror("read");
exit(1);
}
}
if (out == stdout) {
hex_dump(buf, bytes);
printf("\n");
}
else {
printf("got %d bytes\n", bytes);
if (fwrite(buf, 1, bytes, out) == 0)
perror("write output");
}
}
int set_filter(int fd, unsigned int pid)
{
struct dmx_pes_filter_params f;
f.pid = (uint16_t) pid;
f.input = DMX_IN_FRONTEND;
f.output = DMX_OUT_TAP;
f.pes_type = DMX_PES_OTHER;
f.flags = DMX_IMMEDIATE_START;
if (ioctl(fd, DMX_SET_PES_FILTER, &f) == -1) {
perror("ioctl DMX_SET_PES_FILTER");
return 1;
}
return 0;
}
int main(int argc, char *argv[])
{
int dmxfd;
unsigned long pid;
char *dmxdev = "/dev/dvb/adapter0/demux0";
FILE *out = stdout;
if (argc != 2 && argc != 3)
usage();
pid = strtoul(argv[1], NULL, 0);
if (pid > 0x1fff)
usage();
if (getenv("DEMUX"))
dmxdev = getenv("DEMUX");
fprintf(stderr, "test_pes: using '%s'\n", dmxdev);
fprintf(stderr, " PID 0x%04lx\n", pid);
if (argc == 3) {
out = fopen(argv[2], "wb");
if (!out) {
perror("open output file");
exit(1);
}
fprintf(stderr, " output to '%s'\n", argv[2]);
}
if ((dmxfd = open(dmxdev, O_RDWR)) < 0){
perror("open");
return 1;
}
if (set_filter(dmxfd, pid) != 0)
return 1;
for (;;) {
process_pes(dmxfd, out);
}
close(dmxfd);
return 0;
}
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