1 files changed, 87 insertions, 0 deletions
diff --git a/test/setpid.c b/test/setpid.c
new file mode 100644
index 0000000..fa0333c
--- /dev/null
+++ b/test/setpid.c
@@ -0,0 +1,87 @@
+/*
+ * Set video and audio PIDs in the demux; useful only if you have
+ * a hardware MPEG decoder and you're tuned to a transport stream.
+ *
+ * usage: DEMUX=/dev/dvb/adapterX/demuxX setpid video_pid audio_pid
+ */
+
+#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", 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;
+}
+
+