The length (as number of frames) of a recording's index file can now be determined by a call to cIndexFile::GetLength()

CONTRIBUTORS

@@ -2228,6 +2228,8 @@ Christoph Haubrich <christoph1.haubrich@arcor.de>
  the same PID
  for adding HD stream content identifiers to vdr.5
  for reporting that Setup.InitialChannel was dereferenced without checking for NULL
+ for suggesting to implement a function to determine the length of a recording's
+ index file
 
 Pekka Mauno <pekka.mauno@iki.fi>
  for fixing cSchedule::GetFollowingEvent() in case there is currently no present

HISTORY

@@ -6679,3 +6679,5 @@ Video Disk Recorder Revision History
 - Now scanning new transponders before old ones, to make sure transponder changes
   are recognized (thanks to Reinhard Nissl).
 - Implemented static cIndexFile::IndexFileName().
+- The length (as number of frames) of a recording's index file can now be determined
+  by a call to cIndexFile::GetLength() (suggested by Christoph Haubrich).

recording.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: recording.c 2.32 2011/08/13 10:59:32 kls Exp $
+ * $Id: recording.c 2.33 2011/08/13 12:37:25 kls Exp $
  */
 
 #include "recording.h"
@@ -1816,6 +1816,15 @@ void cIndexFile::Delete(void)
      }
 }
 
+int cIndexFile::GetLength(const char *FileName, bool IsPesRecording)
+{
+  struct stat buf;
+  cString s = IndexFileName(FileName, IsPesRecording);
+  if (*s && stat(s, &buf) == 0)
+     return buf.st_size / (IsPesRecording ? sizeof(tIndexTs) : sizeof(tIndexPes));
+  return -1;
+}
+
 bool GenerateIndex(const char *FileName) 
 {
   if (DirectoryOk(FileName)) {

recording.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: recording.h 2.20 2011/08/13 09:52:25 kls Exp $
+ * $Id: recording.h 2.21 2011/08/13 12:36:54 kls Exp $
  */
 
 #ifndef __RECORDING_H
@@ -260,6 +260,9 @@ public:
   bool StoreResume(int Index) { return resumeFile.Save(Index); }
   bool IsStillRecording(void);
   void Delete(void);
+  static int GetLength(const char *FileName, bool IsPesRecording = false);
+       ///< Calculates the recording length (numer of frames) without actually reading the index file.
+       ///< Returns -1 in case of error.
   };
 
 class cFileName {