diff options
Diffstat (limited to 'src/3rdparty/libjpeg/src/jchuff.h')
| -rw-r--r-- | src/3rdparty/libjpeg/src/jchuff.h | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/src/3rdparty/libjpeg/src/jchuff.h b/src/3rdparty/libjpeg/src/jchuff.h index 314a2325c9..21f17b89b0 100644 --- a/src/3rdparty/libjpeg/src/jchuff.h +++ b/src/3rdparty/libjpeg/src/jchuff.h @@ -3,8 +3,8 @@ * * This file was part of the Independent JPEG Group's software: * Copyright (C) 1991-1997, Thomas G. Lane. - * It was modified by The libjpeg-turbo Project to include only code relevant - * to libjpeg-turbo. + * libjpeg-turbo Modifications: + * Copyright (C) 2022, D. R. Commander. * For conditions of distribution and use, see the accompanying README.ijg * file. * @@ -19,11 +19,13 @@ * Hence the magnitude should always fit in 10 or 14 bits respectively. */ -#if BITS_IN_JSAMPLE == 8 -#define MAX_COEF_BITS 10 -#else -#define MAX_COEF_BITS 14 -#endif +/* The progressive Huffman encoder uses an unsigned 16-bit data type to store + * absolute values of coefficients, because it is possible to inject a + * coefficient value of -32768 into the encoder by attempting to transform a + * malformed 12-bit JPEG image, and the absolute value of -32768 would overflow + * a signed 16-bit integer. + */ +typedef unsigned short UJCOEF; /* Derived data constructed for each Huffman table */ |