[linux-dvb] How to CA support in current driver? (was: Re: Re: OSD problems investigated)

["Henning Holtschneider" <hh@holtschneider.com>]

----- Original Message -----
From: "John Williams" <John.Williams@pcmsdatafit.co.uk>
To: <linux-dvb@linuxtv.org>
Sent: Monday, February 18, 2002 10:41 AM
Subject: [linux-dvb] Re: OSD problems investigated


> You might like to investigate the new code to read and write the CI that
> has appeared in the latest driver versions (0.9.4 and later). It is
> undocumented, but I suppose it is doing the same as my code was trying to
> do. Perhaps Convergence have fixed the CI support in their firmware; if
so,
> then I'll be the first to throw away what I've done and use their code.

I'm currently trying to use the new code, but I don't know how to do it
right. I haven't done any DVB programming before so please be gentle with me
if I'm doing something fundamentally wrong here ;-)

If I understand correctly, I have to send the Program Number to the
CA-Interface to start decrypting a program stream. How do I do this? The
driver code in dvb.c just reads:

[dvb.c lines 4154ff]
        case CA_SEND_MSG:

                break;

This does nothing, so how do I get a message sent to the CA system?

Here is my "work in progress" patch against VDR 0.99:

--- dvbapi.c.orig       Sun Feb 24 18:15:46 2002
+++ dvbapi.c    Sun Feb 24 20:09:18 2002
@@ -48,6 +48,7 @@
 #define DEV_OST_DEMUX     "/dev/ost/demux"
 #define DEV_OST_VIDEO     "/dev/ost/video"
 #define DEV_OST_AUDIO     "/dev/ost/audio"
+#define DEV_OST_CA        "/dev/ost/ca"

 // The size of the array used to buffer video data:
 // (must be larger than MINVIDEODATA - see remux.h)
@@ -3262,6 +3263,24 @@
      if (fd_audio >= 0)
         CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, true));
      }
+
+  // hh
+  if (Ca) {
+    ca_msg_t msg;
+    if(fd_ca >= 0)
+      close(fd_ca);
+    fd_ca = OstOpen(DEV_OST_CA, 0, O_RDWR);
+    if (fd_ca >= 0) {
+      esyslog(LOG_INFO, "sending Pnr %d to CA", Pnr);
+      msg.type = 0xfffe;
+      msg.index = Pnr;
+      CHECK(ioctl(fd_ca, CA_SEND_MSG, &msg));
+      close(fd_ca);
+      fd_ca = -1;
+    } else {
+      esyslog(LOG_ERR, "Error: could not open CA on card %d", Ca);
+    }
+  }

   if (this == PrimaryDvbApi && siProcessor)
      siProcessor->SetCurrentServiceID(Pnr);
--- dvbapi.h.orig       Sun Feb 24 20:13:50 2002
+++ dvbapi.h    Sun Feb 24 20:13:06 2002
@@ -26,6 +26,7 @@
 #include <ost/video.h>
 #include <ost/audio.h>
 #include <ost/osd.h>
+#include <ost/ca.h>
 #include <stdio.h>

 #include "dvbosd.h"
@@ -89,7 +90,7 @@
   friend class cTransferBuffer;
 private:
   FrontendType frontendType;
-  int fd_osd, fd_frontend, fd_sec, fd_dvr, fd_audio, fd_video, fd_demuxa1,
fd_demuxa2, fd_demuxd1, fd_demuxd2, fd_demuxv, fd_demuxt;
+  int fd_osd, fd_frontend, fd_sec, fd_dvr, fd_audio, fd_video, fd_demuxa1,
fd_demuxa2, fd_demuxd1, fd_demuxd2, fd_demuxv, fd_demuxt, fd_ca;
   int vPid, aPid1, aPid2, dPid1, dPid2;
   bool SetPid(int fd, dmxPesType_t PesType, int Pid, dmxOutput_t Output);
   bool SetVpid(int Vpid, dmxOutput_t Output)  { return SetPid(fd_demuxv,
DMX_PES_VIDEO,    Vpid, Output); }

Thanks,
hh



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