Attempting to stay on the current channel in case of an upcoming recording

HISTORY

@@ -5657,3 +5657,6 @@ Video Disk Recorder Revision History
   to Ludwig Nussel for pointing this out).
 - Revised the fix of calculating the scrollbar height in the skins. The scrollbar
   handle now always has a height that is at least the width of the scrollbar.
+- When switching the device that's used for live viewing away from the current
+  transponder in favor of an upcoming recording, an attempt is now made to stay
+  on the current channel by possibly going into 'Transfer Mode'.

device.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: device.c 1.154 2008/02/17 15:55:06 kls Exp $
+ * $Id: device.c 1.155 2008/02/23 13:09:01 kls Exp $
  */
 
 #include "device.h"
@@ -218,6 +218,7 @@ int cDevice::nextCardIndex = 0;
 int cDevice::currentChannel = 1;
 cDevice *cDevice::device[MAXDEVICES] = { NULL };
 cDevice *cDevice::primaryDevice = NULL;
+cDevice *cDevice::avoidDevice = NULL;
 
 cDevice::cDevice(void)
 {
@@ -356,6 +357,8 @@ cDevice *cDevice::GetDevice(int Index)
 
 cDevice *cDevice::GetDevice(const cChannel *Channel, int Priority, bool LiveView)
 {
+  cDevice *AvoidDevice = avoidDevice;
+  avoidDevice = NULL;
   // Collect the current priorities of all CAM slots that can decrypt the channel:
   int NumCamSlots = CamSlots.Count();
   int SlotPriority[NumCamSlots];
@@ -385,6 +388,8 @@ cDevice *cDevice::GetDevice(const cChannel *Channel, int Priority, bool LiveView
       if (NumUsableSlots && SlotPriority[j] > MAXPRIORITY)
          continue; // there is no CAM available in this slot
       for (int i = 0; i < numDevices; i++) {
+          if (device[i] == AvoidDevice)
+             continue; // this device shall be temporarily avoided
           if (Channel->Ca() && Channel->Ca() <= CA_DVB_MAX && Channel->Ca() != device[i]->CardIndex() + 1)
              continue; // a specific card was requested, but not this one
           if (NumUsableSlots && !CamSlots.Get(j)->Assign(device[i], true))

device.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: device.h 1.90 2008/02/16 13:50:11 kls Exp $
+ * $Id: device.h 1.91 2008/02/23 13:13:04 kls Exp $
  */
 
 #ifndef __DEVICE_H
@@ -101,6 +101,7 @@ private:
   static int useDevice;
   static cDevice *device[MAXDEVICES];
   static cDevice *primaryDevice;
+  static cDevice *avoidDevice;
 public:
   static int NumDevices(void) { return numDevices; }
          ///< Returns the total number of devices.
@@ -145,6 +146,9 @@ public:
          ///< this device/CAM combination will be skipped in the next call to
          ///< GetDevice().
          ///< See also ProvidesChannel().
+  static void SetAvoidDevice(cDevice *Device) { avoidDevice = Device; }
+         ///< Sets the given Device to be temporarily avoided in the next call to
+         ///< GetDevice(const cChannel, int, bool).
   static void Shutdown(void);
          ///< Closes down all devices.
          ///< Must be called at the end of the program.

vdr.c

@@ -22,7 +22,7 @@
  *
  * The project's page is at http://www.cadsoft.de/vdr
  *
- * $Id: vdr.c 1.310 2008/02/10 14:23:31 kls Exp $
+ * $Id: vdr.c 1.311 2008/02/23 13:19:10 kls Exp $
  */
 
 #include <getopt.h>
@@ -877,7 +877,9 @@ int main(int argc, char *argv[])
                            }
                         if (cDevice::PrimaryDevice()->HasDecoder() && !cDevice::PrimaryDevice()->HasProgramme()) {
                            // the previous SwitchChannel() has switched away the current live channel
-                           Channels.SwitchTo(Timer->Channel()->Number()); // avoids toggling between old channel and black screen
+                           cDevice::SetAvoidDevice(Device);
+                           if (!Channels.SwitchTo(cDevice::CurrentChannel())) // try to switch to the original channel on a different device...
+                              Channels.SwitchTo(Timer->Channel()->Number()); // ...or avoid toggling between old channel and black screen
                            Skins.Message(mtInfo, tr("Upcoming recording!"));
                            }
                         }