diff options
Diffstat (limited to 'engines/bladerunner/vqa_decoder.cpp')
| -rw-r--r-- | engines/bladerunner/vqa_decoder.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/engines/bladerunner/vqa_decoder.cpp b/engines/bladerunner/vqa_decoder.cpp index 38d3fd4744..ddd6c98abd 100644 --- a/engines/bladerunner/vqa_decoder.cpp +++ b/engines/bladerunner/vqa_decoder.cpp @@ -347,10 +347,12 @@ bool VQADecoder::readVQHD(Common::SeekableReadStream *s, uint32 size) { bool VQADecoder::VQAVideoTrack::readVQFR(Common::SeekableReadStream *s, uint32 size, uint readFlags) { IFFChunkHeader chd; - while (size >= 8) { + signed int sizeLeft = size; // we have to use signed int to avoid underflow + + while (sizeLeft >= 8) { if (!readIFFChunkHeader(s, &chd)) return false; - size -= roundup(chd.size) + 8; + sizeLeft -= roundup(chd.size) + 8; bool rc = false; switch (chd.id) { @@ -663,10 +665,12 @@ void VQADecoder::VQAVideoTrack::decodeVideoFrame(Graphics::Surface *surface, boo bool VQADecoder::VQAVideoTrack::readVQFL(Common::SeekableReadStream *s, uint32 size, uint readFlags) { IFFChunkHeader chd; - while (size >= 8) { + signed int sizeLeft = size; // we have to use signed int to avoid underflow + + while (sizeLeft >= 8) { if (!readIFFChunkHeader(s, &chd)) return false; - size -= roundup(chd.size) + 8; + sizeLeft -= roundup(chd.size) + 8; bool rc = false; switch (chd.id) { |