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
|
#define USAGE \
"\n" \
"\nSet video and audio PIDs in the demux; useful only if you have" \
"\na hardware MPEG decoder and you're tuned to a transport stream." \
"\n" \
"\nusage: DEMUX=/dev/dvb/adapterX/demuxX setpid video_pid audio_pid" \
"\n"
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdio.h>
#include <linux/dvb/dmx.h>
static
int setup_demux (char *dmxdev, int video_pid, int audio_pid)
{
int vfd, afd;
struct dmx_pes_filter_params pesfilter;
printf ("video_pid == 0x%04x\n", video_pid);
printf ("audio_pid == 0x%04x\n", audio_pid);
if ((vfd = open (dmxdev, O_RDWR)) < 0) {
perror("open 1");
return -1;
}
pesfilter.pid = video_pid;
pesfilter.input = DMX_IN_FRONTEND;
pesfilter.output = DMX_OUT_DECODER;
pesfilter.pes_type = DMX_PES_VIDEO;
pesfilter.flags = DMX_IMMEDIATE_START;
if (ioctl (vfd, DMX_SET_PES_FILTER, &pesfilter) < 0) {
perror("ioctl DMX_SET_PES_FILTER (video)");
return -1;
}
close (vfd);
if ((afd = open (dmxdev, O_RDWR)) < 0) {
perror("open 1");
return -1;
}
pesfilter.pid = audio_pid;
pesfilter.input = DMX_IN_FRONTEND;
pesfilter.output = DMX_OUT_DECODER;
pesfilter.pes_type = DMX_PES_AUDIO;
pesfilter.flags = DMX_IMMEDIATE_START;
if (ioctl (afd, DMX_SET_PES_FILTER, &pesfilter) < 0) {
perror("ioctl DMX_SET_PES_FILTER (audio)");
return -1;
}
close (afd);
return 0;
}
int main (int argc, char **argv)
{
char *dmxdev = "/dev/dvb/adapter0/demux0";
int video_pid, audio_pid;
if (argc != 3) {
printf ("\nusage: %s <video pid> <audio pid>\n\n" USAGE, argv[0]);
exit (1);
}
if (getenv("DEMUX"))
dmxdev = getenv("DEMUX");
printf("setpid: using '%s'\n", dmxdev);
video_pid = strtol(argv[1], NULL, 0);
audio_pid = strtol(argv[2], NULL, 0);
if (setup_demux (dmxdev, video_pid, audio_pid) < 0)
return 1;
return 0;
}
|
