[GNUnet-SVN] r23133 - Extractor/src/plugins

[gnunet]

Author: grothoff
Date: 2012-08-06 12:49:58 +0200 (Mon, 06 Aug 2012)
New Revision: 23133

Modified:
   Extractor/src/plugins/mpeg_extractor.c
Log:
fast skip to end for non-compressed large mpeg files

Modified: Extractor/src/plugins/mpeg_extractor.c
===================================================================
--- Extractor/src/plugins/mpeg_extractor.c      2012-08-05 23:41:16 UTC (rev 
23132)
+++ Extractor/src/plugins/mpeg_extractor.c      2012-08-06 10:49:58 UTC (rev 
23133)
@@ -1,4 +1,3 @@
-
 /*
      This file is part of libextractor.
      (C) 2004, 2005, 2006, 2009, 2012 Vidyut Samanta and Christian Grothoff
@@ -54,6 +53,7 @@
   char format[256];
   char gop_format[256];
   int have_gop;
+  uint64_t fsize;
 
   if (NULL == (handle = mpeg2_init ()))
     return;
@@ -62,6 +62,7 @@
       mpeg2_close (handle);
       return;
     }
+  fsize = ec->get_size (ec->cls);  
   buf = NULL;
   have_gop = 0;
   while (1)
@@ -102,7 +103,15 @@
          if ((info->sequence->flags & SEQ_FLAG_MPEG2) > 0)
            ADD ("MPEG2", EXTRACTOR_METATYPE_FORMAT_VERSION);
          else
-           ADD ("MPEG1", EXTRACTOR_METATYPE_FORMAT_VERSION);     
+           ADD ("MPEG1", EXTRACTOR_METATYPE_FORMAT_VERSION);
+         if ( (fsize != -1) &&
+              (fsize > 1024 * 256 * 2) )
+           {
+             /* skip to the end of the mpeg for speed */
+             ec->seek (ec->cls,
+                       fsize - 256 * 1024,
+                       SEEK_SET);
+           }
          break;
        case STATE_GOP:
          if ( (NULL != info->gop) &&