# If you have two or more VDRs and you like them to mutually share
# there DVB cards you might need to apply this patch first.
#
# This is a modified version of the patch for VDRs with BIGPATCH. 
# Thanks to p_body@vdrportal.
#
# IMPORTANT: As this patch does not only modify streamdev-server but
# also an exported method of VDR, you will need to
#
#         !!!!! RECOMPILE VDR AND ALL PLUGINS !!!!!
#
# Why do I need the patch?
# --------------------------
# Before switching channels VDR will consider all of its devices to
# find the one with the least impact. This includes the device provided
# by the streamdev-client plugin. Streamdev-client will forward the
# request to its server which in turn checks all of its devices. Now if
# the server is running streamdev-client, too, the request will again
# be forwarded to its server and finally you will endup in a loop.
#
# What does the patch do?
# -----------------------
# The patch adds the additional parameter "bool DVBCardsOnly" to VDR's
# device selection method cDevice::GetDevice(...). The parameter
# defaults to false which gives you the standard behaviour of GetDevice.
# When set to true, GetDevice will use only those devices with a card
# index < MAXDVBDEVICES, so only real DVB cards will be considered.
# Other devices like streamdev-client or DVB cards provided by plugin
# (Hauppauge PVR) won't be used.
#
# Author: Frank Schmirler (http://vdr.schmirler.de)
#
--- device.h.orig	2006-11-15 12:01:34.000000000 +0100
+++ device.h	2006-11-15 12:02:15.000000000 +0100
@@ -128,7 +128,7 @@
          ///< Gets the device with the given Index.
          ///< \param Index must be in the range 0..numDevices-1.
          ///< \return A pointer to the device, or NULL if the Index was invalid.
-  static cDevice *GetDevice(const cChannel *Channel, int Priority = -1, bool *NeedsDetachReceivers = NULL, bool LiveView = false);
+  static cDevice *GetDevice(const cChannel *Channel, int Priority = -1, bool *NeedsDetachReceivers = NULL, bool LiveView = false, bool DVBCardsOnly = false);
          ///< Returns a device that is able to receive the given Channel at the
          ///< given Priority, with the least impact on active recordings and
          ///< live viewing.
--- device.c.orig	2006-11-15 12:01:30.000000000 +0100
+++ device.c	2006-11-22 12:28:05.000000000 +0100
@@ -8,6 +8,7 @@
  */
 
 #include "device.h"
+#include "dvbdevice.h"
 #include <errno.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
@@ -278,11 +279,13 @@
   return (0 <= Index && Index < numDevices) ? device[Index] : NULL;
 }
 
-cDevice *cDevice::GetDevice(const cChannel *Channel, int Priority, bool *NeedsDetachReceivers, bool LiveView)
+cDevice *cDevice::GetDevice(const cChannel *Channel, int Priority, bool *NeedsDetachReceivers, bool LiveView, bool DVBCardsOnly)
 {
   cDevice *d = NULL;
   uint Impact = 0xFFFFFFFF; // we're looking for a device with the least impact
   for (int i = 0; i < numDevices; i++) {
+      if (DVBCardsOnly && device[i]->CardIndex() >= MAXDVBDEVICES)
+         continue;
       bool ndr;
       if (device[i]->ProvidesChannel(Channel, Priority, &ndr)) { // this device is basicly able to do the job
          // Put together an integer number that reflects the "impact" using
--- PLUGINS/src/streamdev/server/connection.c.orig	2006-11-15 12:10:11.000000000 +0100
+++ PLUGINS/src/streamdev/server/connection.c	2006-11-15 12:10:59.000000000 +0100
@@ -132,7 +132,7 @@
 	Dprintf(" * GetDevice(const cChannel*, int)\n");
 	Dprintf(" * -------------------------------\n");
 
-	device = cDevice::GetDevice(Channel, Priority);
+	device = cDevice::GetDevice(Channel, Priority, NULL, NULL, true);
 
 	Dprintf(" * Found following device: %p (%d)\n", device, 
 			device ? device->CardIndex() + 1 : 0);
@@ -150,7 +150,7 @@
 		const cChannel *current = Channels.GetByNumber(cDevice::CurrentChannel());
 		isyslog("streamdev-server: Detaching current receiver");
 		Detach();
-		device = cDevice::GetDevice(Channel, Priority);
+		device = cDevice::GetDevice(Channel, Priority, NULL, NULL, true);
 		Attach();
 		Dprintf(" * Found following device: %p (%d)\n", device, 
 				device ? device->CardIndex() + 1 : 0);