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Merge "GetHistoBits: fix integer overflow"

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pascal massimino 2012-10-03 14:51:22 -07:00 committed by Gerrit Code Review
commit 7fee5d1231
1 changed files with 4 additions and 4 deletions
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8
src/enc/vp8l.c
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@ -899,13 +899,13 @@ static int GetHistoBits(const WebPConfig* const config,
const WebPPicture* const pic) { const WebPPicture* const pic) {
const int width = pic->width; const int width = pic->width;
const int height = pic->height; const int height = pic->height;
const size_t hist_size = sizeof(VP8LHistogram); const uint64_t hist_size = sizeof(VP8LHistogram);
// Make tile size a function of encoding method (Range: 0 to 6). // Make tile size a function of encoding method (Range: 0 to 6).
int histo_bits = 7 - config->method; int histo_bits = 7 - config->method;
while (1) { while (1) {
const size_t huff_image_size = VP8LSubSampleSize(width, histo_bits) * const uint64_t huff_image_size = VP8LSubSampleSize(width, histo_bits) *
VP8LSubSampleSize(height, histo_bits) * VP8LSubSampleSize(height, histo_bits) *
hist_size; hist_size;
if (huff_image_size <= MAX_HUFF_IMAGE_SIZE) break; if (huff_image_size <= MAX_HUFF_IMAGE_SIZE) break;
++histo_bits; ++histo_bits;
} }