Update libjpeg-turbo to v2.0.1
In order to apply some performance updates from ARM, we need to update
libjpeg-turbo. These performance updates have yielded a 50% speedup on
some devices.
This CL updates our copy of libjpeg-turbo to v2.0.1 and re-applies our
local patches. This patch also deletes some extra files which were not
being used locally.
Update our local patch that was applied to fix http://crbug.com/398235
(https://codereview.appspot.com/229430043/). The original patch
incorrectly removed "& 0xFF" which limited an array index to within
that array's bounds (effectively reverting
https://github.com/libjpeg-turbo/libjpeg-turbo/commit/fa1d18385d904d530b4aec83ab7757a33397de6e).
Restore the mask, making the array access safe and fixing a graphical
glitch which would otherwise be introduced by this change.
Bug:922430
Change-Id: I3860fdb424deecf7a17818ed09a640e632e71f8d
diff --git a/jidctred.c b/jidctred.c
index 2d5b546..1ff352f 100644
--- a/jidctred.c
+++ b/jidctred.c
@@ -4,7 +4,7 @@
* This file was part of the Independent JPEG Group's software.
* Copyright (C) 1994-1998, Thomas G. Lane.
* libjpeg-turbo Modifications:
- * Copyright (C) 2015, D. R. Commander
+ * Copyright (C) 2015, D. R. Commander.
* For conditions of distribution and use, see the accompanying README.ijg
* file.
*
@@ -58,20 +58,20 @@
*/
#if CONST_BITS == 13
-#define FIX_0_211164243 ((JLONG) 1730) /* FIX(0.211164243) */
-#define FIX_0_509795579 ((JLONG) 4176) /* FIX(0.509795579) */
-#define FIX_0_601344887 ((JLONG) 4926) /* FIX(0.601344887) */
-#define FIX_0_720959822 ((JLONG) 5906) /* FIX(0.720959822) */
-#define FIX_0_765366865 ((JLONG) 6270) /* FIX(0.765366865) */
-#define FIX_0_850430095 ((JLONG) 6967) /* FIX(0.850430095) */
-#define FIX_0_899976223 ((JLONG) 7373) /* FIX(0.899976223) */
-#define FIX_1_061594337 ((JLONG) 8697) /* FIX(1.061594337) */
-#define FIX_1_272758580 ((JLONG) 10426) /* FIX(1.272758580) */
-#define FIX_1_451774981 ((JLONG) 11893) /* FIX(1.451774981) */
-#define FIX_1_847759065 ((JLONG) 15137) /* FIX(1.847759065) */
-#define FIX_2_172734803 ((JLONG) 17799) /* FIX(2.172734803) */
-#define FIX_2_562915447 ((JLONG) 20995) /* FIX(2.562915447) */
-#define FIX_3_624509785 ((JLONG) 29692) /* FIX(3.624509785) */
+#define FIX_0_211164243 ((JLONG)1730) /* FIX(0.211164243) */
+#define FIX_0_509795579 ((JLONG)4176) /* FIX(0.509795579) */
+#define FIX_0_601344887 ((JLONG)4926) /* FIX(0.601344887) */
+#define FIX_0_720959822 ((JLONG)5906) /* FIX(0.720959822) */
+#define FIX_0_765366865 ((JLONG)6270) /* FIX(0.765366865) */
+#define FIX_0_850430095 ((JLONG)6967) /* FIX(0.850430095) */
+#define FIX_0_899976223 ((JLONG)7373) /* FIX(0.899976223) */
+#define FIX_1_061594337 ((JLONG)8697) /* FIX(1.061594337) */
+#define FIX_1_272758580 ((JLONG)10426) /* FIX(1.272758580) */
+#define FIX_1_451774981 ((JLONG)11893) /* FIX(1.451774981) */
+#define FIX_1_847759065 ((JLONG)15137) /* FIX(1.847759065) */
+#define FIX_2_172734803 ((JLONG)17799) /* FIX(2.172734803) */
+#define FIX_2_562915447 ((JLONG)20995) /* FIX(2.562915447) */
+#define FIX_3_624509785 ((JLONG)29692) /* FIX(3.624509785) */
#else
#define FIX_0_211164243 FIX(0.211164243)
#define FIX_0_509795579 FIX(0.509795579)
@@ -98,9 +98,9 @@
*/
#if BITS_IN_JSAMPLE == 8
-#define MULTIPLY(var,const) MULTIPLY16C16(var,const)
+#define MULTIPLY(var, const) MULTIPLY16C16(var, const)
#else
-#define MULTIPLY(var,const) ((var) * (const))
+#define MULTIPLY(var, const) ((var) * (const))
#endif
@@ -109,7 +109,7 @@
* are 16 bits or less, so either int or short multiply will work.
*/
-#define DEQUANTIZE(coef,quantval) (((ISLOW_MULT_TYPE) (coef)) * (quantval))
+#define DEQUANTIZE(coef, quantval) (((ISLOW_MULT_TYPE)(coef)) * (quantval))
/*
@@ -118,9 +118,9 @@
*/
GLOBAL(void)
-jpeg_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info *compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col)
+jpeg_idct_4x4(j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf,
+ JDIMENSION output_col)
{
JLONG tmp0, tmp2, tmp10, tmp12;
JLONG z1, z2, z3, z4;
@@ -130,69 +130,73 @@
JSAMPROW outptr;
JSAMPLE *range_limit = IDCT_range_limit(cinfo);
int ctr;
- int workspace[DCTSIZE*4]; /* buffers data between passes */
+ int workspace[DCTSIZE * 4]; /* buffers data between passes */
SHIFT_TEMPS
/* Pass 1: process columns from input, store into work array. */
inptr = coef_block;
- quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
+ quantptr = (ISLOW_MULT_TYPE *)compptr->dct_table;
wsptr = workspace;
for (ctr = DCTSIZE; ctr > 0; inptr++, quantptr++, wsptr++, ctr--) {
/* Don't bother to process column 4, because second pass won't use it */
- if (ctr == DCTSIZE-4)
+ if (ctr == DCTSIZE - 4)
continue;
- if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
- inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*5] == 0 &&
- inptr[DCTSIZE*6] == 0 && inptr[DCTSIZE*7] == 0) {
+ if (inptr[DCTSIZE * 1] == 0 && inptr[DCTSIZE * 2] == 0 &&
+ inptr[DCTSIZE * 3] == 0 && inptr[DCTSIZE * 5] == 0 &&
+ inptr[DCTSIZE * 6] == 0 && inptr[DCTSIZE * 7] == 0) {
/* AC terms all zero; we need not examine term 4 for 4x4 output */
- int dcval = LEFT_SHIFT(DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]),
- PASS1_BITS);
+ int dcval = LEFT_SHIFT(DEQUANTIZE(inptr[DCTSIZE * 0],
+ quantptr[DCTSIZE * 0]), PASS1_BITS);
- wsptr[DCTSIZE*0] = dcval;
- wsptr[DCTSIZE*1] = dcval;
- wsptr[DCTSIZE*2] = dcval;
- wsptr[DCTSIZE*3] = dcval;
+ wsptr[DCTSIZE * 0] = dcval;
+ wsptr[DCTSIZE * 1] = dcval;
+ wsptr[DCTSIZE * 2] = dcval;
+ wsptr[DCTSIZE * 3] = dcval;
continue;
}
/* Even part */
- tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
- tmp0 = LEFT_SHIFT(tmp0, CONST_BITS+1);
+ tmp0 = DEQUANTIZE(inptr[DCTSIZE * 0], quantptr[DCTSIZE * 0]);
+ tmp0 = LEFT_SHIFT(tmp0, CONST_BITS + 1);
- z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
- z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
+ z2 = DEQUANTIZE(inptr[DCTSIZE * 2], quantptr[DCTSIZE * 2]);
+ z3 = DEQUANTIZE(inptr[DCTSIZE * 6], quantptr[DCTSIZE * 6]);
- tmp2 = MULTIPLY(z2, FIX_1_847759065) + MULTIPLY(z3, - FIX_0_765366865);
+ tmp2 = MULTIPLY(z2, FIX_1_847759065) + MULTIPLY(z3, -FIX_0_765366865);
tmp10 = tmp0 + tmp2;
tmp12 = tmp0 - tmp2;
/* Odd part */
- z1 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
- z2 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
- z3 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
- z4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
+ z1 = DEQUANTIZE(inptr[DCTSIZE * 7], quantptr[DCTSIZE * 7]);
+ z2 = DEQUANTIZE(inptr[DCTSIZE * 5], quantptr[DCTSIZE * 5]);
+ z3 = DEQUANTIZE(inptr[DCTSIZE * 3], quantptr[DCTSIZE * 3]);
+ z4 = DEQUANTIZE(inptr[DCTSIZE * 1], quantptr[DCTSIZE * 1]);
- tmp0 = MULTIPLY(z1, - FIX_0_211164243) /* sqrt(2) * (c3-c1) */
- + MULTIPLY(z2, FIX_1_451774981) /* sqrt(2) * (c3+c7) */
- + MULTIPLY(z3, - FIX_2_172734803) /* sqrt(2) * (-c1-c5) */
- + MULTIPLY(z4, FIX_1_061594337); /* sqrt(2) * (c5+c7) */
+ tmp0 = MULTIPLY(z1, -FIX_0_211164243) + /* sqrt(2) * ( c3-c1) */
+ MULTIPLY(z2, FIX_1_451774981) + /* sqrt(2) * ( c3+c7) */
+ MULTIPLY(z3, -FIX_2_172734803) + /* sqrt(2) * (-c1-c5) */
+ MULTIPLY(z4, FIX_1_061594337); /* sqrt(2) * ( c5+c7) */
- tmp2 = MULTIPLY(z1, - FIX_0_509795579) /* sqrt(2) * (c7-c5) */
- + MULTIPLY(z2, - FIX_0_601344887) /* sqrt(2) * (c5-c1) */
- + MULTIPLY(z3, FIX_0_899976223) /* sqrt(2) * (c3-c7) */
- + MULTIPLY(z4, FIX_2_562915447); /* sqrt(2) * (c1+c3) */
+ tmp2 = MULTIPLY(z1, -FIX_0_509795579) + /* sqrt(2) * (c7-c5) */
+ MULTIPLY(z2, -FIX_0_601344887) + /* sqrt(2) * (c5-c1) */
+ MULTIPLY(z3, FIX_0_899976223) + /* sqrt(2) * (c3-c7) */
+ MULTIPLY(z4, FIX_2_562915447); /* sqrt(2) * (c1+c3) */
/* Final output stage */
- wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp2, CONST_BITS-PASS1_BITS+1);
- wsptr[DCTSIZE*3] = (int) DESCALE(tmp10 - tmp2, CONST_BITS-PASS1_BITS+1);
- wsptr[DCTSIZE*1] = (int) DESCALE(tmp12 + tmp0, CONST_BITS-PASS1_BITS+1);
- wsptr[DCTSIZE*2] = (int) DESCALE(tmp12 - tmp0, CONST_BITS-PASS1_BITS+1);
+ wsptr[DCTSIZE * 0] =
+ (int)DESCALE(tmp10 + tmp2, CONST_BITS - PASS1_BITS + 1);
+ wsptr[DCTSIZE * 3] =
+ (int)DESCALE(tmp10 - tmp2, CONST_BITS - PASS1_BITS + 1);
+ wsptr[DCTSIZE * 1] =
+ (int)DESCALE(tmp12 + tmp0, CONST_BITS - PASS1_BITS + 1);
+ wsptr[DCTSIZE * 2] =
+ (int)DESCALE(tmp12 - tmp0, CONST_BITS - PASS1_BITS + 1);
}
/* Pass 2: process 4 rows from work array, store into output array. */
@@ -206,8 +210,8 @@
if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 &&
wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
/* AC terms all zero */
- JSAMPLE dcval = range_limit[(int) DESCALE((JLONG) wsptr[0], PASS1_BITS+3)
- & RANGE_MASK];
+ JSAMPLE dcval = range_limit[(int)DESCALE((JLONG)wsptr[0],
+ PASS1_BITS + 3) & RANGE_MASK];
outptr[0] = dcval;
outptr[1] = dcval;
@@ -221,45 +225,45 @@
/* Even part */
- tmp0 = LEFT_SHIFT((JLONG) wsptr[0], CONST_BITS+1);
+ tmp0 = LEFT_SHIFT((JLONG)wsptr[0], CONST_BITS + 1);
- tmp2 = MULTIPLY((JLONG) wsptr[2], FIX_1_847759065)
- + MULTIPLY((JLONG) wsptr[6], - FIX_0_765366865);
+ tmp2 = MULTIPLY((JLONG)wsptr[2], FIX_1_847759065) +
+ MULTIPLY((JLONG)wsptr[6], -FIX_0_765366865);
tmp10 = tmp0 + tmp2;
tmp12 = tmp0 - tmp2;
/* Odd part */
- z1 = (JLONG) wsptr[7];
- z2 = (JLONG) wsptr[5];
- z3 = (JLONG) wsptr[3];
- z4 = (JLONG) wsptr[1];
+ z1 = (JLONG)wsptr[7];
+ z2 = (JLONG)wsptr[5];
+ z3 = (JLONG)wsptr[3];
+ z4 = (JLONG)wsptr[1];
- tmp0 = MULTIPLY(z1, - FIX_0_211164243) /* sqrt(2) * (c3-c1) */
- + MULTIPLY(z2, FIX_1_451774981) /* sqrt(2) * (c3+c7) */
- + MULTIPLY(z3, - FIX_2_172734803) /* sqrt(2) * (-c1-c5) */
- + MULTIPLY(z4, FIX_1_061594337); /* sqrt(2) * (c5+c7) */
+ tmp0 = MULTIPLY(z1, -FIX_0_211164243) + /* sqrt(2) * ( c3-c1) */
+ MULTIPLY(z2, FIX_1_451774981) + /* sqrt(2) * ( c3+c7) */
+ MULTIPLY(z3, -FIX_2_172734803) + /* sqrt(2) * (-c1-c5) */
+ MULTIPLY(z4, FIX_1_061594337); /* sqrt(2) * ( c5+c7) */
- tmp2 = MULTIPLY(z1, - FIX_0_509795579) /* sqrt(2) * (c7-c5) */
- + MULTIPLY(z2, - FIX_0_601344887) /* sqrt(2) * (c5-c1) */
- + MULTIPLY(z3, FIX_0_899976223) /* sqrt(2) * (c3-c7) */
- + MULTIPLY(z4, FIX_2_562915447); /* sqrt(2) * (c1+c3) */
+ tmp2 = MULTIPLY(z1, -FIX_0_509795579) + /* sqrt(2) * (c7-c5) */
+ MULTIPLY(z2, -FIX_0_601344887) + /* sqrt(2) * (c5-c1) */
+ MULTIPLY(z3, FIX_0_899976223) + /* sqrt(2) * (c3-c7) */
+ MULTIPLY(z4, FIX_2_562915447); /* sqrt(2) * (c1+c3) */
/* Final output stage */
- outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp2,
- CONST_BITS+PASS1_BITS+3+1)
- & RANGE_MASK];
- outptr[3] = range_limit[(int) DESCALE(tmp10 - tmp2,
- CONST_BITS+PASS1_BITS+3+1)
- & RANGE_MASK];
- outptr[1] = range_limit[(int) DESCALE(tmp12 + tmp0,
- CONST_BITS+PASS1_BITS+3+1)
- & RANGE_MASK];
- outptr[2] = range_limit[(int) DESCALE(tmp12 - tmp0,
- CONST_BITS+PASS1_BITS+3+1)
- & RANGE_MASK];
+ outptr[0] = range_limit[(int)DESCALE(tmp10 + tmp2,
+ CONST_BITS + PASS1_BITS + 3 + 1) &
+ RANGE_MASK];
+ outptr[3] = range_limit[(int)DESCALE(tmp10 - tmp2,
+ CONST_BITS + PASS1_BITS + 3 + 1) &
+ RANGE_MASK];
+ outptr[1] = range_limit[(int)DESCALE(tmp12 + tmp0,
+ CONST_BITS + PASS1_BITS + 3 + 1) &
+ RANGE_MASK];
+ outptr[2] = range_limit[(int)DESCALE(tmp12 - tmp0,
+ CONST_BITS + PASS1_BITS + 3 + 1) &
+ RANGE_MASK];
wsptr += DCTSIZE; /* advance pointer to next row */
}
@@ -272,9 +276,9 @@
*/
GLOBAL(void)
-jpeg_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info *compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col)
+jpeg_idct_2x2(j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf,
+ JDIMENSION output_col)
{
JLONG tmp0, tmp10, z1;
JCOEFPTR inptr;
@@ -283,50 +287,52 @@
JSAMPROW outptr;
JSAMPLE *range_limit = IDCT_range_limit(cinfo);
int ctr;
- int workspace[DCTSIZE*2]; /* buffers data between passes */
+ int workspace[DCTSIZE * 2]; /* buffers data between passes */
SHIFT_TEMPS
/* Pass 1: process columns from input, store into work array. */
inptr = coef_block;
- quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
+ quantptr = (ISLOW_MULT_TYPE *)compptr->dct_table;
wsptr = workspace;
for (ctr = DCTSIZE; ctr > 0; inptr++, quantptr++, wsptr++, ctr--) {
/* Don't bother to process columns 2,4,6 */
- if (ctr == DCTSIZE-2 || ctr == DCTSIZE-4 || ctr == DCTSIZE-6)
+ if (ctr == DCTSIZE - 2 || ctr == DCTSIZE - 4 || ctr == DCTSIZE - 6)
continue;
- if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*3] == 0 &&
- inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*7] == 0) {
+ if (inptr[DCTSIZE * 1] == 0 && inptr[DCTSIZE * 3] == 0 &&
+ inptr[DCTSIZE * 5] == 0 && inptr[DCTSIZE * 7] == 0) {
/* AC terms all zero; we need not examine terms 2,4,6 for 2x2 output */
- int dcval = LEFT_SHIFT(DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]),
- PASS1_BITS);
+ int dcval = LEFT_SHIFT(DEQUANTIZE(inptr[DCTSIZE * 0],
+ quantptr[DCTSIZE * 0]), PASS1_BITS);
- wsptr[DCTSIZE*0] = dcval;
- wsptr[DCTSIZE*1] = dcval;
+ wsptr[DCTSIZE * 0] = dcval;
+ wsptr[DCTSIZE * 1] = dcval;
continue;
}
/* Even part */
- z1 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
- tmp10 = LEFT_SHIFT(z1, CONST_BITS+2);
+ z1 = DEQUANTIZE(inptr[DCTSIZE * 0], quantptr[DCTSIZE * 0]);
+ tmp10 = LEFT_SHIFT(z1, CONST_BITS + 2);
/* Odd part */
- z1 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
- tmp0 = MULTIPLY(z1, - FIX_0_720959822); /* sqrt(2) * (c7-c5+c3-c1) */
- z1 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
- tmp0 += MULTIPLY(z1, FIX_0_850430095); /* sqrt(2) * (-c1+c3+c5+c7) */
- z1 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
- tmp0 += MULTIPLY(z1, - FIX_1_272758580); /* sqrt(2) * (-c1+c3-c5-c7) */
- z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
- tmp0 += MULTIPLY(z1, FIX_3_624509785); /* sqrt(2) * (c1+c3+c5+c7) */
+ z1 = DEQUANTIZE(inptr[DCTSIZE * 7], quantptr[DCTSIZE * 7]);
+ tmp0 = MULTIPLY(z1, -FIX_0_720959822); /* sqrt(2) * ( c7-c5+c3-c1) */
+ z1 = DEQUANTIZE(inptr[DCTSIZE * 5], quantptr[DCTSIZE * 5]);
+ tmp0 += MULTIPLY(z1, FIX_0_850430095); /* sqrt(2) * (-c1+c3+c5+c7) */
+ z1 = DEQUANTIZE(inptr[DCTSIZE * 3], quantptr[DCTSIZE * 3]);
+ tmp0 += MULTIPLY(z1, -FIX_1_272758580); /* sqrt(2) * (-c1+c3-c5-c7) */
+ z1 = DEQUANTIZE(inptr[DCTSIZE * 1], quantptr[DCTSIZE * 1]);
+ tmp0 += MULTIPLY(z1, FIX_3_624509785); /* sqrt(2) * ( c1+c3+c5+c7) */
/* Final output stage */
- wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp0, CONST_BITS-PASS1_BITS+2);
- wsptr[DCTSIZE*1] = (int) DESCALE(tmp10 - tmp0, CONST_BITS-PASS1_BITS+2);
+ wsptr[DCTSIZE * 0] =
+ (int)DESCALE(tmp10 + tmp0, CONST_BITS - PASS1_BITS + 2);
+ wsptr[DCTSIZE * 1] =
+ (int)DESCALE(tmp10 - tmp0, CONST_BITS - PASS1_BITS + 2);
}
/* Pass 2: process 2 rows from work array, store into output array. */
@@ -339,8 +345,8 @@
#ifndef NO_ZERO_ROW_TEST
if (wsptr[1] == 0 && wsptr[3] == 0 && wsptr[5] == 0 && wsptr[7] == 0) {
/* AC terms all zero */
- JSAMPLE dcval = range_limit[(int) DESCALE((JLONG) wsptr[0], PASS1_BITS+3)
- & RANGE_MASK];
+ JSAMPLE dcval = range_limit[(int)DESCALE((JLONG)wsptr[0],
+ PASS1_BITS + 3) & RANGE_MASK];
outptr[0] = dcval;
outptr[1] = dcval;
@@ -352,23 +358,23 @@
/* Even part */
- tmp10 = LEFT_SHIFT((JLONG) wsptr[0], CONST_BITS+2);
+ tmp10 = LEFT_SHIFT((JLONG)wsptr[0], CONST_BITS + 2);
/* Odd part */
- tmp0 = MULTIPLY((JLONG) wsptr[7], - FIX_0_720959822) /* sqrt(2) * (c7-c5+c3-c1) */
- + MULTIPLY((JLONG) wsptr[5], FIX_0_850430095) /* sqrt(2) * (-c1+c3+c5+c7) */
- + MULTIPLY((JLONG) wsptr[3], - FIX_1_272758580) /* sqrt(2) * (-c1+c3-c5-c7) */
- + MULTIPLY((JLONG) wsptr[1], FIX_3_624509785); /* sqrt(2) * (c1+c3+c5+c7) */
+ tmp0 = MULTIPLY((JLONG)wsptr[7], -FIX_0_720959822) + /* sqrt(2) * ( c7-c5+c3-c1) */
+ MULTIPLY((JLONG)wsptr[5], FIX_0_850430095) + /* sqrt(2) * (-c1+c3+c5+c7) */
+ MULTIPLY((JLONG)wsptr[3], -FIX_1_272758580) + /* sqrt(2) * (-c1+c3-c5-c7) */
+ MULTIPLY((JLONG)wsptr[1], FIX_3_624509785); /* sqrt(2) * ( c1+c3+c5+c7) */
/* Final output stage */
- outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp0,
- CONST_BITS+PASS1_BITS+3+2)
- & RANGE_MASK];
- outptr[1] = range_limit[(int) DESCALE(tmp10 - tmp0,
- CONST_BITS+PASS1_BITS+3+2)
- & RANGE_MASK];
+ outptr[0] = range_limit[(int)DESCALE(tmp10 + tmp0,
+ CONST_BITS + PASS1_BITS + 3 + 2) &
+ RANGE_MASK];
+ outptr[1] = range_limit[(int)DESCALE(tmp10 - tmp0,
+ CONST_BITS + PASS1_BITS + 3 + 2) &
+ RANGE_MASK];
wsptr += DCTSIZE; /* advance pointer to next row */
}
@@ -381,9 +387,9 @@
*/
GLOBAL(void)
-jpeg_idct_1x1 (j_decompress_ptr cinfo, jpeg_component_info *compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col)
+jpeg_idct_1x1(j_decompress_ptr cinfo, jpeg_component_info *compptr,
+ JCOEFPTR coef_block, JSAMPARRAY output_buf,
+ JDIMENSION output_col)
{
int dcval;
ISLOW_MULT_TYPE *quantptr;
@@ -393,9 +399,9 @@
/* We hardly need an inverse DCT routine for this: just take the
* average pixel value, which is one-eighth of the DC coefficient.
*/
- quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
+ quantptr = (ISLOW_MULT_TYPE *)compptr->dct_table;
dcval = DEQUANTIZE(coef_block[0], quantptr[0]);
- dcval = (int) DESCALE((JLONG) dcval, 3);
+ dcval = (int)DESCALE((JLONG)dcval, 3);
output_buf[0][output_col] = range_limit[dcval & RANGE_MASK];
}