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Unified Diff: jdct.h

Issue 1934113002: Update libjpeg_turbo to 1.4.90 from https://github.com/libjpeg-turbo/ (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/libjpeg_turbo.git@master
Patch Set: Created 4 years, 8 months ago
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Index: jdct.h
diff --git a/jdct.h b/jdct.h
index 36374484f3d9cbf3e00fb581d9d7c3e0a355908f..faf8e1cf0315192edc114797cc6819a657781ec2 100644
--- a/jdct.h
+++ b/jdct.h
@@ -1,14 +1,17 @@
/*
* jdct.h
*
+ * This file was part of the Independent JPEG Group's software:
* Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
+ * libjpeg-turbo Modifications:
+ * Copyright (C) 2015, D. R. Commander.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
*
* This include file contains common declarations for the forward and
* inverse DCT modules. These declarations are private to the DCT managers
* (jcdctmgr.c, jddctmgr.c) and the individual DCT algorithms.
- * The individual DCT algorithms are kept in separate files to ease
+ * The individual DCT algorithms are kept in separate files to ease
* machine-dependent tuning (e.g., assembly coding).
*/
@@ -16,7 +19,7 @@
/*
* A forward DCT routine is given a pointer to a work area of type DCTELEM[];
* the DCT is to be performed in-place in that buffer. Type DCTELEM is int
- * for 8-bit samples, INT32 for 12-bit samples. (NOTE: Floating-point DCT
+ * for 8-bit samples, JLONG for 12-bit samples. (NOTE: Floating-point DCT
* implementations use an array of type FAST_FLOAT, instead.)
* The DCT inputs are expected to be signed (range +-CENTERJSAMPLE).
* The DCT outputs are returned scaled up by a factor of 8; they therefore
@@ -29,7 +32,7 @@
#if BITS_IN_JSAMPLE == 8
#ifndef WITH_SIMD
-typedef int DCTELEM; /* 16 or 32 bits is fine */
+typedef int DCTELEM; /* 16 or 32 bits is fine */
typedef unsigned int UDCTELEM;
typedef unsigned long long UDCTELEM2;
#else
@@ -38,8 +41,7 @@ typedef unsigned short UDCTELEM;
typedef unsigned int UDCTELEM2;
#endif
#else
-typedef INT32 DCTELEM; /* must have 32 bits */
-typedef UINT32 UDCTELEM;
+typedef JLONG DCTELEM; /* must have 32 bits */
typedef unsigned long long UDCTELEM2;
#endif
@@ -64,10 +66,10 @@ typedef unsigned long long UDCTELEM2;
typedef MULTIPLIER ISLOW_MULT_TYPE; /* short or int, whichever is faster */
#if BITS_IN_JSAMPLE == 8
typedef MULTIPLIER IFAST_MULT_TYPE; /* 16 bits is OK, use short if faster */
-#define IFAST_SCALE_BITS 2 /* fractional bits in scale factors */
+#define IFAST_SCALE_BITS 2 /* fractional bits in scale factors */
#else
-typedef INT32 IFAST_MULT_TYPE; /* need 32 bits for scaled quantizers */
-#define IFAST_SCALE_BITS 13 /* fractional bits in scale factors */
+typedef JLONG IFAST_MULT_TYPE; /* need 32 bits for scaled quantizers */
+#define IFAST_SCALE_BITS 13 /* fractional bits in scale factors */
#endif
typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */
@@ -86,105 +88,79 @@ typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */
#define RANGE_MASK (MAXJSAMPLE * 4 + 3) /* 2 bits wider than legal samples */
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jpeg_fdct_islow jFDislow
-#define jpeg_fdct_ifast jFDifast
-#define jpeg_fdct_float jFDfloat
-#define jpeg_idct_islow jRDislow
-#define jpeg_idct_ifast jRDifast
-#define jpeg_idct_float jRDfloat
-#define jpeg_idct_7x7 jRD7x7
-#define jpeg_idct_6x6 jRD6x6
-#define jpeg_idct_5x5 jRD5x5
-#define jpeg_idct_4x4 jRD4x4
-#define jpeg_idct_3x3 jRD3x3
-#define jpeg_idct_2x2 jRD2x2
-#define jpeg_idct_1x1 jRD1x1
-#define jpeg_idct_9x9 jRD9x9
-#define jpeg_idct_10x10 jRD10x10
-#define jpeg_idct_11x11 jRD11x11
-#define jpeg_idct_12x12 jRD12x12
-#define jpeg_idct_13x13 jRD13x13
-#define jpeg_idct_14x14 jRD14x14
-#define jpeg_idct_15x15 jRD15x15
-#define jpeg_idct_16x16 jRD16x16
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
/* Extern declarations for the forward and inverse DCT routines. */
-EXTERN(void) jpeg_fdct_islow JPP((DCTELEM * data));
-EXTERN(void) jpeg_fdct_ifast JPP((DCTELEM * data));
-EXTERN(void) jpeg_fdct_float JPP((FAST_FLOAT * data));
+EXTERN(void) jpeg_fdct_islow (DCTELEM *data);
+EXTERN(void) jpeg_fdct_ifast (DCTELEM *data);
+EXTERN(void) jpeg_fdct_float (FAST_FLOAT *data);
EXTERN(void) jpeg_idct_islow
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_ifast
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_float
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_7x7
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_6x6
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_5x5
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_4x4
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_3x3
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_2x2
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_1x1
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_9x9
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_10x10
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_11x11
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_12x12
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_13x13
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_14x14
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_15x15
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
EXTERN(void) jpeg_idct_16x16
- JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+ (j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
/*
* Macros for handling fixed-point arithmetic; these are used by many
* but not all of the DCT/IDCT modules.
*
- * All values are expected to be of type INT32.
+ * All values are expected to be of type JLONG.
* Fractional constants are scaled left by CONST_BITS bits.
* CONST_BITS is defined within each module using these macros,
* and may differ from one module to the next.
*/
-#define ONE ((INT32) 1)
+#define ONE ((JLONG) 1)
#define CONST_SCALE (ONE << CONST_BITS)
/* Convert a positive real constant to an integer scaled by CONST_SCALE.
@@ -192,16 +168,16 @@ EXTERN(void) jpeg_idct_16x16
* thus causing a lot of useless floating-point operations at run time.
*/
-#define FIX(x) ((INT32) ((x) * CONST_SCALE + 0.5))
+#define FIX(x) ((JLONG) ((x) * CONST_SCALE + 0.5))
-/* Descale and correctly round an INT32 value that's scaled by N bits.
+/* Descale and correctly round a JLONG value that's scaled by N bits.
* We assume RIGHT_SHIFT rounds towards minus infinity, so adding
* the fudge factor is correct for either sign of X.
*/
#define DESCALE(x,n) RIGHT_SHIFT((x) + (ONE << ((n)-1)), n)
-/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
+/* Multiply a JLONG variable by a JLONG constant to yield a JLONG result.
* This macro is used only when the two inputs will actually be no more than
* 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a
* full 32x32 multiply. This provides a useful speedup on many machines.
@@ -210,23 +186,23 @@ EXTERN(void) jpeg_idct_16x16
* correct combination of casts.
*/
-#ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */
+#ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */
#define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT16) (const)))
#endif
-#ifdef SHORTxLCONST_32 /* known to work with Microsoft C 6.0 */
-#define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT32) (const)))
+#ifdef SHORTxLCONST_32 /* known to work with Microsoft C 6.0 */
+#define MULTIPLY16C16(var,const) (((INT16) (var)) * ((JLONG) (const)))
#endif
-#ifndef MULTIPLY16C16 /* default definition */
+#ifndef MULTIPLY16C16 /* default definition */
#define MULTIPLY16C16(var,const) ((var) * (const))
#endif
/* Same except both inputs are variables. */
-#ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */
+#ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */
#define MULTIPLY16V16(var1,var2) (((INT16) (var1)) * ((INT16) (var2)))
#endif
-#ifndef MULTIPLY16V16 /* default definition */
+#ifndef MULTIPLY16V16 /* default definition */
#define MULTIPLY16V16(var1,var2) ((var1) * (var2))
#endif

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