/* 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; }