Added cDevice::ReadFilter()

CONTRIBUTORS

@@ -87,6 +87,8 @@ Deti Fliegl <deti@fliegl.de>
  for fixing setting the OSD size in the 'Confirm' interface call
  for fixing handling improper buffer lengths in the EIT parser
  for a patch that was used to implement StopSectionHandler()
+ for adding cDevice::ReadFilter() to allow devices to implement their own way of
+ retrieving section filter data
 
 Dave Chapman <dave@dchapman.com>
  for implementing support for the teletext PID

HISTORY

@@ -7206,3 +7206,5 @@ Video Disk Recorder Revision History
 - Fixed detecting transfer mode on full featured DVB cards (thanks to Stefan Huelswitt
   for reporting a problem with updating CA descriptors in such cases).
 - Fixed a race condition when zapping in transfer mode (reported by Reinhard Nissl).
+- The new function cDevice::ReadFilter() can be used by devices to implement their
+  own way of retrieving section filter data (thanks to Deti Fliegl).

PLUGINS.html

@@ -1888,6 +1888,7 @@ the functions
 
 <p><table><tr><td class="code"><pre>
 virtual int OpenFilter(u_short Pid, u_char Tid, u_char Mask);
+<modified>virtual int ReadFilter(int Handle, void *Buffer, size_t Length);</modified>
 virtual void CloseFilter(int Handle);
 </pre></td></tr></table><p>
 

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 2.63 2012/08/25 11:56:08 kls Exp $
+ * $Id: device.c 2.64 2012/08/26 12:53:39 kls Exp $
  */
 
 #include "device.h"
@@ -593,6 +593,11 @@ int cDevice::OpenFilter(u_short Pid, u_char Tid, u_char Mask)
   return -1;
 }
 
+int cDevice::ReadFilter(int Handle, void *Buffer, size_t Length)
+{
+  return safe_read(Handle, Buffer, Length);
+}
+
 void cDevice::CloseFilter(int Handle)
 {
   close(Handle);

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 2.39 2012/04/04 09:48:21 kls Exp $
+ * $Id: device.h 2.40 2012/08/26 12:56:14 kls Exp $
  */
 
 #ifndef __DEVICE_H
@@ -393,6 +393,10 @@ public:
        ///< Opens a file handle for the given filter data.
        ///< A derived device that provides section data must
        ///< implement this function.
+  virtual int ReadFilter(int Handle, void *Buffer, size_t Length);
+       ///< Reads data from a handle for the given filter.
+       ///< A derived class need not implement this function, because this
+       ///< is done by the default implementation.
   virtual void CloseFilter(int Handle);
        ///< Closes a file handle that has previously been opened
        ///< by OpenFilter(). If this is as simple as calling close(Handle),

sections.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: sections.c 1.15 2007/10/14 12:52:07 kls Exp $
+ * $Id: sections.c 2.1 2012/08/26 12:53:39 kls Exp $
  */
 
 #include "sections.h"
@@ -198,7 +198,7 @@ void cSectionHandler::Action(void)
                   if (fh) {
                      // Read section data:
                      unsigned char buf[4096]; // max. allowed size for any EIT section
-                     int r = safe_read(fh->handle, buf, sizeof(buf));
+                     int r = device->ReadFilter(fh->handle, buf, sizeof(buf));
                      if (!DeviceHasLock)
                         continue; // we do the read anyway, to flush any data that might have come from a different transponder
                      if (r > 3) { // minimum number of bytes necessary to get section length