Fixed extracting the ES data and added MPEG1 handling to cDvbDevice::StillPicture()

CONTRIBUTORS

@@ -176,6 +176,7 @@ Stefan Huelswitt <huels@iname.com>
  for fixing a memory leak in cNonBlockingFileReader
  for fixing an uninitialized variable in cDisplayChannel
  for fixing a possible access of invalid file handles in cSIProcessor::Action()
+ for fixing extracting the ES data in cDvbDevice::StillPicture()
 
 Ulrich Röder <roeder@efr-net.de>
  for pointing out that there are channels that have a symbol rate higher than
@@ -267,6 +268,7 @@ Andy Grobb <Charly98@01019freenet.de>
 
 Thomas Heiligenmann <thomas@heiligenmann.de>
  for implementing the SVDRP commands LSTR and DELR
+ for adding MPEG1 handling to cDvbDevice::StillPicture()
 
 Norbert Schmidt <nschmidt-nrw@t-online.de>
  for filling in some missing teletext PIDs

HISTORY

@@ -2403,7 +2403,7 @@ Video Disk Recorder Revision History
 
 - Updated 'channels.conf.cable' (thanks to Stefan Hußfeldt).
 
-2003-10-03: Version 1.3.0
+2003-10-17: Version 1.2.6pre1
 
 - Updated the required driver version in INSTALL (thanks to Jens Groth for
   reporting this one).
@@ -2420,3 +2420,7 @@ Video Disk Recorder Revision History
 - Now trying to get a timer's channel without RID when loading 'timers.conf'
   (thanks to Thomas Rausch).
 - Removed the unused 0x73 (TOT) filter in eit.c (thanks to Andreas Trauer).
+- Fixed extracting the ES data in cDvbDevice::StillPicture() (thanks to Stefan
+  Huelswitt).
+- Added MPEG1 handling to cDvbDevice::StillPicture() (thanks to Thomas
+  Heiligenmann).

config.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: config.h 1.175 2003/10/03 11:49:31 kls Exp $
+ * $Id: config.h 1.176 2003/10/17 12:35:23 kls Exp $
  */
 
 #ifndef __CONFIG_H
@@ -19,8 +19,8 @@
 #include "device.h"
 #include "tools.h"
 
-#define VDRVERSION  "1.3.0"
+#define VDRVERSION  "1.2.6pre1"
-#define VDRVERSNUM   10300  // Version * 10000 + Major * 100 + Minor
+#define VDRVERSNUM   10206  // Version * 10000 + Major * 100 + Minor
 
 #define MAXPRIORITY 99
 #define MAXLIFETIME 99

dvbdevice.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: dvbdevice.c 1.65 2003/10/04 12:31:15 kls Exp $
+ * $Id: dvbdevice.c 1.66 2003/10/17 13:31:06 kls Exp $
  */
 
 #include "dvbdevice.h"
@@ -947,21 +947,53 @@ void cDvbDevice::StillPicture(const uchar *Data, int Length)
         return;
      int i = 0;
      int blen = 0;
-     while (i < Length - 4) {
+     while (i < Length - 6) {
-           if (Data[i] == 0x00 && Data[i + 1] == 0x00 && Data[i + 2] == 0x01 && (Data[i + 3] & 0xF0) == 0xE0) {
+           if (Data[i] == 0x00 && Data[i + 1] == 0x00 && Data[i + 2] == 0x01) {
-              // skip PES header
-              int offs = i + 6;
               int len = Data[i + 4] * 256 + Data[i + 5];
-              // skip header extension
+              if ((Data[i + 3] & 0xF0) == 0xE0) { // video packet
-              if ((Data[i + 6] & 0xC0) == 0x80) {
+                 // skip PES header
-                 offs += 3;
+                 int offs = i + 6;
-                 offs += Data[i + 8];
+                 // skip header extension
-                 len -= 3;
+                 if ((Data[i + 6] & 0xC0) == 0x80) {
-                 len -= Data[i + 8];
+                    // MPEG-2 PES header
+                    offs += 3;
+                    offs += Data[i + 8];
+                    len -= 3;
+                    len -= Data[i + 8];
+                    }
+                 else {
+                    // MPEG-1 PES header
+                    while (offs < Length && len > 0 && Data[offs] == 0xFF) {
+                          offs++;
+                          len--;
+                          }
+                    if ((Data[offs] & 0xC0) == 0x40) {
+                       offs += 2;
+                       len -= 2;
+                       }
+                    if ((Data[offs] & 0xF0) == 0x20) {
+                       offs += 5;
+                       len -= 5;
+                       }
+                    else if ((Data[offs] & 0xF0) == 0x30) {
+                       offs += 10;
+                       len -= 10;
+                       }
+                    else if (Data[offs] == 0x0F) {
+                       offs++;
+                       len--;
+                       }
+                    }
+                 if (blen + len > Length) // invalid PES length field
+                    break;
+                 memcpy(&buf[blen], &Data[offs], len);
+                 i = offs + len;
+                 blen += len;
                  }
-              memcpy(&buf[blen], &Data[offs], len);
+              else if (Data[i + 3] >= 0xBD && Data[i + 3] <= 0xDF) // other PES packets
-              i = offs + len;
+                 i += len + 6;
-              blen += len;
+              else
+                 i++;
               }
            else
               i++;