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| author | Klaus Schmidinger <vdr@tvdr.de> | 2003-10-19 12:59:16 +0200 |
|---|---|---|
| committer | Klaus Schmidinger <vdr@tvdr.de> | 2003-10-19 12:59:16 +0200 |
| commit | 2b29a5ce367d464fd10d6014990c881eccf5207e (patch) | |
| tree | 436bb8791f945a49127dd54eb3af3e389dd0aba3 /dvbdevice.c | |
| parent | e7b6b2fff72cb7221d171b096ea844467af635fe (diff) | |
| download | vdr-2b29a5ce367d464fd10d6014990c881eccf5207e.tar.gz vdr-2b29a5ce367d464fd10d6014990c881eccf5207e.tar.bz2 | |
Improved cDvbDevice::StillPicture()
Diffstat (limited to 'dvbdevice.c')
| -rw-r--r-- | dvbdevice.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/dvbdevice.c b/dvbdevice.c index aed34931..4cbbc759 100644 --- a/dvbdevice.c +++ b/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 1.68 2003/10/18 12:20:38 kls Exp $ + * $Id: dvbdevice.c 1.69 2003/10/19 12:59:16 kls Exp $ */ #include "dvbdevice.h" @@ -956,10 +956,14 @@ void cDvbDevice::StillPicture(const uchar *Data, int Length) // skip header extension if ((Data[i + 6] & 0xC0) == 0x80) { // MPEG-2 PES header + if (Data[i + 8] >= Length) + break; offs += 3; offs += Data[i + 8]; len -= 3; len -= Data[i + 8]; + if (len < 0 || offs + len >= Length) + break; } else { // MPEG-1 PES header @@ -967,19 +971,19 @@ void cDvbDevice::StillPicture(const uchar *Data, int Length) offs++; len--; } - if ((Data[offs] & 0xC0) == 0x40) { + if (offs <= Length - 2 && len >= 2 && (Data[offs] & 0xC0) == 0x40) { offs += 2; len -= 2; } - if ((Data[offs] & 0xF0) == 0x20) { + if (offs <= Length - 5 && len >= 5 && (Data[offs] & 0xF0) == 0x20) { offs += 5; len -= 5; } - else if ((Data[offs] & 0xF0) == 0x30) { + else if (offs <= Length - 10 && len >= 10 && (Data[offs] & 0xF0) == 0x30) { offs += 10; len -= 10; } - else if (Data[offs] == 0x0F) { + else if (offs < Length && len > 0) { offs++; len--; } |