1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/* 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;
}
|
