From 30009067158bc40f50469cb82234b4013ef14e9e Mon Sep 17 00:00:00 2001
From: Klaus Schmidinger <vdr@tvdr.de>
Date: Sat, 13 Aug 2011 12:45:42 +0200
Subject: [PATCH] The length (as number of frames) of a recording's index file
 can now be determined by a call to cIndexFile::GetLength()

---
 CONTRIBUTORS |  2 ++
 HISTORY      |  2 ++
 recording.c  | 11 ++++++++++-
 recording.h  |  5 ++++-
 4 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index c8d777c9..38458790 100644
--- a/CONTRIBUTORS
+++ b/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
diff --git a/HISTORY b/HISTORY
index 7bb15071..e0d7dbed 100644
--- a/HISTORY
+++ b/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).
diff --git a/recording.c b/recording.c
index 317e6305..4456bddb 100644
--- a/recording.c
+++ b/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)) {
diff --git a/recording.h b/recording.h
index 4498ae9b..3a0ad570 100644
--- a/recording.h
+++ b/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 {