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/*
* Copyright © 2018-2019, VideoLAN and dav1d authors
* Copyright © 2018-2019, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <stddef.h>
#include <stdint.h>
#include "common/intops.h"
#include "src/itx_1d.h"
#define CLIP(a) iclip(a, min, max)
/*
* In some places, we use the pattern like this:
* t2 = ((in1 * 1567 - in3 * (3784 - 4096) + 2048) >> 12) - in3;
* even though the reference code might use something like:
* t2 = (in1 * 1567 - in3 * 3784 + 2048) >> 12;
*
* The reason for this is that for 12 bits/component bitstreams (corrupt/
* invalid ones, but they are codable nonetheless), each coefficient or
* input can be 19(+sign) bits, and therefore if the combination of the
* two multipliers (each 12 bits) is >= 4096, the result of the add/sub
* after the pair of multiplies will exceed the 31+sign bit range. Signed
* integer overflows are UB in C, and we'd like to prevent that.
*
* To workaround this, we invert one of the two coefficients (or, if both are
* multiples of 2, we reduce their magnitude by one bit). It should be noted
* that SIMD implementations do not have to follow this exact behaviour. The
* AV1 spec clearly states that the result of the multiply/add pairs should
* fit in 31+sign bit intermediates, and that streams violating this convention
* are not AV1-compliant. So, as long as we don't trigger UB (which some people
* would consider a security vulnerability), we're fine. So, SIMD can simply
* use the faster implementation, even if that might in some cases result in
* integer overflows, since these are not considered valid AV1 anyway, and in
* e.g. x86 assembly, integer overflows are not considered UB, but they merely
* wrap around.
*/
static NOINLINE void
inv_dct4_1d_internal_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max, const int tx64)
{
assert(stride > 0);
const int in0 = c[0 * stride], in1 = c[1 * stride];
int t0, t1, t2, t3;
if (tx64) {
t0 = t1 = (in0 * 181 + 128) >> 8;
t2 = (in1 * 1567 + 2048) >> 12;
t3 = (in1 * 3784 + 2048) >> 12;
} else {
const int in2 = c[2 * stride], in3 = c[3 * stride];
t0 = ((in0 + in2) * 181 + 128) >> 8;
t1 = ((in0 - in2) * 181 + 128) >> 8;
t2 = ((in1 * 1567 - in3 * (3784 - 4096) + 2048) >> 12) - in3;
t3 = ((in1 * (3784 - 4096) + in3 * 1567 + 2048) >> 12) + in1;
}
c[0 * stride] = CLIP(t0 + t3);
c[1 * stride] = CLIP(t1 + t2);
c[2 * stride] = CLIP(t1 - t2);
c[3 * stride] = CLIP(t0 - t3);
}
static void inv_dct4_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
inv_dct4_1d_internal_c(c, stride, min, max, 0);
}
static NOINLINE void
inv_dct8_1d_internal_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max, const int tx64)
{
assert(stride > 0);
inv_dct4_1d_internal_c(c, stride << 1, min, max, tx64);
const int in1 = c[1 * stride], in3 = c[3 * stride];
int t4a, t5a, t6a, t7a;
if (tx64) {
t4a = (in1 * 799 + 2048) >> 12;
t5a = (in3 * -2276 + 2048) >> 12;
t6a = (in3 * 3406 + 2048) >> 12;
t7a = (in1 * 4017 + 2048) >> 12;
} else {
const int in5 = c[5 * stride], in7 = c[7 * stride];
t4a = ((in1 * 799 - in7 * (4017 - 4096) + 2048) >> 12) - in7;
t5a = (in5 * 1703 - in3 * 1138 + 1024) >> 11;
t6a = (in5 * 1138 + in3 * 1703 + 1024) >> 11;
t7a = ((in1 * (4017 - 4096) + in7 * 799 + 2048) >> 12) + in1;
}
const int t4 = CLIP(t4a + t5a);
t5a = CLIP(t4a - t5a);
const int t7 = CLIP(t7a + t6a);
t6a = CLIP(t7a - t6a);
const int t5 = ((t6a - t5a) * 181 + 128) >> 8;
const int t6 = ((t6a + t5a) * 181 + 128) >> 8;
const int t0 = c[0 * stride];
const int t1 = c[2 * stride];
const int t2 = c[4 * stride];
const int t3 = c[6 * stride];
c[0 * stride] = CLIP(t0 + t7);
c[1 * stride] = CLIP(t1 + t6);
c[2 * stride] = CLIP(t2 + t5);
c[3 * stride] = CLIP(t3 + t4);
c[4 * stride] = CLIP(t3 - t4);
c[5 * stride] = CLIP(t2 - t5);
c[6 * stride] = CLIP(t1 - t6);
c[7 * stride] = CLIP(t0 - t7);
}
static void inv_dct8_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
inv_dct8_1d_internal_c(c, stride, min, max, 0);
}
static NOINLINE void
inv_dct16_1d_internal_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max, int tx64)
{
assert(stride > 0);
inv_dct8_1d_internal_c(c, stride << 1, min, max, tx64);
const int in1 = c[1 * stride], in3 = c[3 * stride];
const int in5 = c[5 * stride], in7 = c[7 * stride];
int t8a, t9a, t10a, t11a, t12a, t13a, t14a, t15a;
if (tx64) {
t8a = (in1 * 401 + 2048) >> 12;
t9a = (in7 * -2598 + 2048) >> 12;
t10a = (in5 * 1931 + 2048) >> 12;
t11a = (in3 * -1189 + 2048) >> 12;
t12a = (in3 * 3920 + 2048) >> 12;
t13a = (in5 * 3612 + 2048) >> 12;
t14a = (in7 * 3166 + 2048) >> 12;
t15a = (in1 * 4076 + 2048) >> 12;
} else {
const int in9 = c[ 9 * stride], in11 = c[11 * stride];
const int in13 = c[13 * stride], in15 = c[15 * stride];
t8a = ((in1 * 401 - in15 * (4076 - 4096) + 2048) >> 12) - in15;
t9a = (in9 * 1583 - in7 * 1299 + 1024) >> 11;
t10a = ((in5 * 1931 - in11 * (3612 - 4096) + 2048) >> 12) - in11;
t11a = ((in13 * (3920 - 4096) - in3 * 1189 + 2048) >> 12) + in13;
t12a = ((in13 * 1189 + in3 * (3920 - 4096) + 2048) >> 12) + in3;
t13a = ((in5 * (3612 - 4096) + in11 * 1931 + 2048) >> 12) + in5;
t14a = (in9 * 1299 + in7 * 1583 + 1024) >> 11;
t15a = ((in1 * (4076 - 4096) + in15 * 401 + 2048) >> 12) + in1;
}
int t8 = CLIP(t8a + t9a);
int t9 = CLIP(t8a - t9a);
int t10 = CLIP(t11a - t10a);
int t11 = CLIP(t11a + t10a);
int t12 = CLIP(t12a + t13a);
int t13 = CLIP(t12a - t13a);
int t14 = CLIP(t15a - t14a);
int t15 = CLIP(t15a + t14a);
t9a = (( t14 * 1567 - t9 * (3784 - 4096) + 2048) >> 12) - t9;
t14a = (( t14 * (3784 - 4096) + t9 * 1567 + 2048) >> 12) + t14;
t10a = ((-(t13 * (3784 - 4096) + t10 * 1567) + 2048) >> 12) - t13;
t13a = (( t13 * 1567 - t10 * (3784 - 4096) + 2048) >> 12) - t10;
t8a = CLIP(t8 + t11);
t9 = CLIP(t9a + t10a);
t10 = CLIP(t9a - t10a);
t11a = CLIP(t8 - t11);
t12a = CLIP(t15 - t12);
t13 = CLIP(t14a - t13a);
t14 = CLIP(t14a + t13a);
t15a = CLIP(t15 + t12);
t10a = ((t13 - t10) * 181 + 128) >> 8;
t13a = ((t13 + t10) * 181 + 128) >> 8;
t11 = ((t12a - t11a) * 181 + 128) >> 8;
t12 = ((t12a + t11a) * 181 + 128) >> 8;
const int t0 = c[ 0 * stride];
const int t1 = c[ 2 * stride];
const int t2 = c[ 4 * stride];
const int t3 = c[ 6 * stride];
const int t4 = c[ 8 * stride];
const int t5 = c[10 * stride];
const int t6 = c[12 * stride];
const int t7 = c[14 * stride];
c[ 0 * stride] = CLIP(t0 + t15a);
c[ 1 * stride] = CLIP(t1 + t14);
c[ 2 * stride] = CLIP(t2 + t13a);
c[ 3 * stride] = CLIP(t3 + t12);
c[ 4 * stride] = CLIP(t4 + t11);
c[ 5 * stride] = CLIP(t5 + t10a);
c[ 6 * stride] = CLIP(t6 + t9);
c[ 7 * stride] = CLIP(t7 + t8a);
c[ 8 * stride] = CLIP(t7 - t8a);
c[ 9 * stride] = CLIP(t6 - t9);
c[10 * stride] = CLIP(t5 - t10a);
c[11 * stride] = CLIP(t4 - t11);
c[12 * stride] = CLIP(t3 - t12);
c[13 * stride] = CLIP(t2 - t13a);
c[14 * stride] = CLIP(t1 - t14);
c[15 * stride] = CLIP(t0 - t15a);
}
static void inv_dct16_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
inv_dct16_1d_internal_c(c, stride, min, max, 0);
}
static NOINLINE void
inv_dct32_1d_internal_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max, const int tx64)
{
assert(stride > 0);
inv_dct16_1d_internal_c(c, stride << 1, min, max, tx64);
const int in1 = c[ 1 * stride], in3 = c[ 3 * stride];
const int in5 = c[ 5 * stride], in7 = c[ 7 * stride];
const int in9 = c[ 9 * stride], in11 = c[11 * stride];
const int in13 = c[13 * stride], in15 = c[15 * stride];
int t16a, t17a, t18a, t19a, t20a, t21a, t22a, t23a;
int t24a, t25a, t26a, t27a, t28a, t29a, t30a, t31a;
if (tx64) {
t16a = (in1 * 201 + 2048) >> 12;
t17a = (in15 * -2751 + 2048) >> 12;
t18a = (in9 * 1751 + 2048) >> 12;
t19a = (in7 * -1380 + 2048) >> 12;
t20a = (in5 * 995 + 2048) >> 12;
t21a = (in11 * -2106 + 2048) >> 12;
t22a = (in13 * 2440 + 2048) >> 12;
t23a = (in3 * -601 + 2048) >> 12;
t24a = (in3 * 4052 + 2048) >> 12;
t25a = (in13 * 3290 + 2048) >> 12;
t26a = (in11 * 3513 + 2048) >> 12;
t27a = (in5 * 3973 + 2048) >> 12;
t28a = (in7 * 3857 + 2048) >> 12;
t29a = (in9 * 3703 + 2048) >> 12;
t30a = (in15 * 3035 + 2048) >> 12;
t31a = (in1 * 4091 + 2048) >> 12;
} else {
const int in17 = c[17 * stride], in19 = c[19 * stride];
const int in21 = c[21 * stride], in23 = c[23 * stride];
const int in25 = c[25 * stride], in27 = c[27 * stride];
const int in29 = c[29 * stride], in31 = c[31 * stride];
t16a = ((in1 * 201 - in31 * (4091 - 4096) + 2048) >> 12) - in31;
t17a = ((in17 * (3035 - 4096) - in15 * 2751 + 2048) >> 12) + in17;
t18a = ((in9 * 1751 - in23 * (3703 - 4096) + 2048) >> 12) - in23;
t19a = ((in25 * (3857 - 4096) - in7 * 1380 + 2048) >> 12) + in25;
t20a = ((in5 * 995 - in27 * (3973 - 4096) + 2048) >> 12) - in27;
t21a = ((in21 * (3513 - 4096) - in11 * 2106 + 2048) >> 12) + in21;
t22a = (in13 * 1220 - in19 * 1645 + 1024) >> 11;
t23a = ((in29 * (4052 - 4096) - in3 * 601 + 2048) >> 12) + in29;
t24a = ((in29 * 601 + in3 * (4052 - 4096) + 2048) >> 12) + in3;
t25a = (in13 * 1645 + in19 * 1220 + 1024) >> 11;
t26a = ((in21 * 2106 + in11 * (3513 - 4096) + 2048) >> 12) + in11;
t27a = ((in5 * (3973 - 4096) + in27 * 995 + 2048) >> 12) + in5;
t28a = ((in25 * 1380 + in7 * (3857 - 4096) + 2048) >> 12) + in7;
t29a = ((in9 * (3703 - 4096) + in23 * 1751 + 2048) >> 12) + in9;
t30a = ((in17 * 2751 + in15 * (3035 - 4096) + 2048) >> 12) + in15;
t31a = ((in1 * (4091 - 4096) + in31 * 201 + 2048) >> 12) + in1;
}
int t16 = CLIP(t16a + t17a);
int t17 = CLIP(t16a - t17a);
int t18 = CLIP(t19a - t18a);
int t19 = CLIP(t19a + t18a);
int t20 = CLIP(t20a + t21a);
int t21 = CLIP(t20a - t21a);
int t22 = CLIP(t23a - t22a);
int t23 = CLIP(t23a + t22a);
int t24 = CLIP(t24a + t25a);
int t25 = CLIP(t24a - t25a);
int t26 = CLIP(t27a - t26a);
int t27 = CLIP(t27a + t26a);
int t28 = CLIP(t28a + t29a);
int t29 = CLIP(t28a - t29a);
int t30 = CLIP(t31a - t30a);
int t31 = CLIP(t31a + t30a);
t17a = (( t30 * 799 - t17 * (4017 - 4096) + 2048) >> 12) - t17;
t30a = (( t30 * (4017 - 4096) + t17 * 799 + 2048) >> 12) + t30;
t18a = ((-(t29 * (4017 - 4096) + t18 * 799) + 2048) >> 12) - t29;
t29a = (( t29 * 799 - t18 * (4017 - 4096) + 2048) >> 12) - t18;
t21a = ( t26 * 1703 - t21 * 1138 + 1024) >> 11;
t26a = ( t26 * 1138 + t21 * 1703 + 1024) >> 11;
t22a = (-(t25 * 1138 + t22 * 1703 ) + 1024) >> 11;
t25a = ( t25 * 1703 - t22 * 1138 + 1024) >> 11;
t16a = CLIP(t16 + t19);
t17 = CLIP(t17a + t18a);
t18 = CLIP(t17a - t18a);
t19a = CLIP(t16 - t19);
t20a = CLIP(t23 - t20);
t21 = CLIP(t22a - t21a);
t22 = CLIP(t22a + t21a);
t23a = CLIP(t23 + t20);
t24a = CLIP(t24 + t27);
t25 = CLIP(t25a + t26a);
t26 = CLIP(t25a - t26a);
t27a = CLIP(t24 - t27);
t28a = CLIP(t31 - t28);
t29 = CLIP(t30a - t29a);
t30 = CLIP(t30a + t29a);
t31a = CLIP(t31 + t28);
t18a = (( t29 * 1567 - t18 * (3784 - 4096) + 2048) >> 12) - t18;
t29a = (( t29 * (3784 - 4096) + t18 * 1567 + 2048) >> 12) + t29;
t19 = (( t28a * 1567 - t19a * (3784 - 4096) + 2048) >> 12) - t19a;
t28 = (( t28a * (3784 - 4096) + t19a * 1567 + 2048) >> 12) + t28a;
t20 = ((-(t27a * (3784 - 4096) + t20a * 1567) + 2048) >> 12) - t27a;
t27 = (( t27a * 1567 - t20a * (3784 - 4096) + 2048) >> 12) - t20a;
t21a = ((-(t26 * (3784 - 4096) + t21 * 1567) + 2048) >> 12) - t26;
t26a = (( t26 * 1567 - t21 * (3784 - 4096) + 2048) >> 12) - t21;
t16 = CLIP(t16a + t23a);
t17a = CLIP(t17 + t22);
t18 = CLIP(t18a + t21a);
t19a = CLIP(t19 + t20);
t20a = CLIP(t19 - t20);
t21 = CLIP(t18a - t21a);
t22a = CLIP(t17 - t22);
t23 = CLIP(t16a - t23a);
t24 = CLIP(t31a - t24a);
t25a = CLIP(t30 - t25);
t26 = CLIP(t29a - t26a);
t27a = CLIP(t28 - t27);
t28a = CLIP(t28 + t27);
t29 = CLIP(t29a + t26a);
t30a = CLIP(t30 + t25);
t31 = CLIP(t31a + t24a);
t20 = ((t27a - t20a) * 181 + 128) >> 8;
t27 = ((t27a + t20a) * 181 + 128) >> 8;
t21a = ((t26 - t21 ) * 181 + 128) >> 8;
t26a = ((t26 + t21 ) * 181 + 128) >> 8;
t22 = ((t25a - t22a) * 181 + 128) >> 8;
t25 = ((t25a + t22a) * 181 + 128) >> 8;
t23a = ((t24 - t23 ) * 181 + 128) >> 8;
t24a = ((t24 + t23 ) * 181 + 128) >> 8;
const int t0 = c[ 0 * stride];
const int t1 = c[ 2 * stride];
const int t2 = c[ 4 * stride];
const int t3 = c[ 6 * stride];
const int t4 = c[ 8 * stride];
const int t5 = c[10 * stride];
const int t6 = c[12 * stride];
const int t7 = c[14 * stride];
const int t8 = c[16 * stride];
const int t9 = c[18 * stride];
const int t10 = c[20 * stride];
const int t11 = c[22 * stride];
const int t12 = c[24 * stride];
const int t13 = c[26 * stride];
const int t14 = c[28 * stride];
const int t15 = c[30 * stride];
c[ 0 * stride] = CLIP(t0 + t31);
c[ 1 * stride] = CLIP(t1 + t30a);
c[ 2 * stride] = CLIP(t2 + t29);
c[ 3 * stride] = CLIP(t3 + t28a);
c[ 4 * stride] = CLIP(t4 + t27);
c[ 5 * stride] = CLIP(t5 + t26a);
c[ 6 * stride] = CLIP(t6 + t25);
c[ 7 * stride] = CLIP(t7 + t24a);
c[ 8 * stride] = CLIP(t8 + t23a);
c[ 9 * stride] = CLIP(t9 + t22);
c[10 * stride] = CLIP(t10 + t21a);
c[11 * stride] = CLIP(t11 + t20);
c[12 * stride] = CLIP(t12 + t19a);
c[13 * stride] = CLIP(t13 + t18);
c[14 * stride] = CLIP(t14 + t17a);
c[15 * stride] = CLIP(t15 + t16);
c[16 * stride] = CLIP(t15 - t16);
c[17 * stride] = CLIP(t14 - t17a);
c[18 * stride] = CLIP(t13 - t18);
c[19 * stride] = CLIP(t12 - t19a);
c[20 * stride] = CLIP(t11 - t20);
c[21 * stride] = CLIP(t10 - t21a);
c[22 * stride] = CLIP(t9 - t22);
c[23 * stride] = CLIP(t8 - t23a);
c[24 * stride] = CLIP(t7 - t24a);
c[25 * stride] = CLIP(t6 - t25);
c[26 * stride] = CLIP(t5 - t26a);
c[27 * stride] = CLIP(t4 - t27);
c[28 * stride] = CLIP(t3 - t28a);
c[29 * stride] = CLIP(t2 - t29);
c[30 * stride] = CLIP(t1 - t30a);
c[31 * stride] = CLIP(t0 - t31);
}
static void inv_dct32_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
inv_dct32_1d_internal_c(c, stride, min, max, 0);
}
static void inv_dct64_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
assert(stride > 0);
inv_dct32_1d_internal_c(c, stride << 1, min, max, 1);
const int in1 = c[ 1 * stride], in3 = c[ 3 * stride];
const int in5 = c[ 5 * stride], in7 = c[ 7 * stride];
const int in9 = c[ 9 * stride], in11 = c[11 * stride];
const int in13 = c[13 * stride], in15 = c[15 * stride];
const int in17 = c[17 * stride], in19 = c[19 * stride];
const int in21 = c[21 * stride], in23 = c[23 * stride];
const int in25 = c[25 * stride], in27 = c[27 * stride];
const int in29 = c[29 * stride], in31 = c[31 * stride];
int t32a = (in1 * 101 + 2048) >> 12;
int t33a = (in31 * -2824 + 2048) >> 12;
int t34a = (in17 * 1660 + 2048) >> 12;
int t35a = (in15 * -1474 + 2048) >> 12;
int t36a = (in9 * 897 + 2048) >> 12;
int t37a = (in23 * -2191 + 2048) >> 12;
int t38a = (in25 * 2359 + 2048) >> 12;
int t39a = (in7 * -700 + 2048) >> 12;
int t40a = (in5 * 501 + 2048) >> 12;
int t41a = (in27 * -2520 + 2048) >> 12;
int t42a = (in21 * 2019 + 2048) >> 12;
int t43a = (in11 * -1092 + 2048) >> 12;
int t44a = (in13 * 1285 + 2048) >> 12;
int t45a = (in19 * -1842 + 2048) >> 12;
int t46a = (in29 * 2675 + 2048) >> 12;
int t47a = (in3 * -301 + 2048) >> 12;
int t48a = (in3 * 4085 + 2048) >> 12;
int t49a = (in29 * 3102 + 2048) >> 12;
int t50a = (in19 * 3659 + 2048) >> 12;
int t51a = (in13 * 3889 + 2048) >> 12;
int t52a = (in11 * 3948 + 2048) >> 12;
int t53a = (in21 * 3564 + 2048) >> 12;
int t54a = (in27 * 3229 + 2048) >> 12;
int t55a = (in5 * 4065 + 2048) >> 12;
int t56a = (in7 * 4036 + 2048) >> 12;
int t57a = (in25 * 3349 + 2048) >> 12;
int t58a = (in23 * 3461 + 2048) >> 12;
int t59a = (in9 * 3996 + 2048) >> 12;
int t60a = (in15 * 3822 + 2048) >> 12;
int t61a = (in17 * 3745 + 2048) >> 12;
int t62a = (in31 * 2967 + 2048) >> 12;
int t63a = (in1 * 4095 + 2048) >> 12;
int t32 = CLIP(t32a + t33a);
int t33 = CLIP(t32a - t33a);
int t34 = CLIP(t35a - t34a);
int t35 = CLIP(t35a + t34a);
int t36 = CLIP(t36a + t37a);
int t37 = CLIP(t36a - t37a);
int t38 = CLIP(t39a - t38a);
int t39 = CLIP(t39a + t38a);
int t40 = CLIP(t40a + t41a);
int t41 = CLIP(t40a - t41a);
int t42 = CLIP(t43a - t42a);
int t43 = CLIP(t43a + t42a);
int t44 = CLIP(t44a + t45a);
int t45 = CLIP(t44a - t45a);
int t46 = CLIP(t47a - t46a);
int t47 = CLIP(t47a + t46a);
int t48 = CLIP(t48a + t49a);
int t49 = CLIP(t48a - t49a);
int t50 = CLIP(t51a - t50a);
int t51 = CLIP(t51a + t50a);
int t52 = CLIP(t52a + t53a);
int t53 = CLIP(t52a - t53a);
int t54 = CLIP(t55a - t54a);
int t55 = CLIP(t55a + t54a);
int t56 = CLIP(t56a + t57a);
int t57 = CLIP(t56a - t57a);
int t58 = CLIP(t59a - t58a);
int t59 = CLIP(t59a + t58a);
int t60 = CLIP(t60a + t61a);
int t61 = CLIP(t60a - t61a);
int t62 = CLIP(t63a - t62a);
int t63 = CLIP(t63a + t62a);
t33a = ((t33 * (4096 - 4076) + t62 * 401 + 2048) >> 12) - t33;
t34a = ((t34 * -401 + t61 * (4096 - 4076) + 2048) >> 12) - t61;
t37a = (t37 * -1299 + t58 * 1583 + 1024) >> 11;
t38a = (t38 * -1583 + t57 * -1299 + 1024) >> 11;
t41a = ((t41 * (4096 - 3612) + t54 * 1931 + 2048) >> 12) - t41;
t42a = ((t42 * -1931 + t53 * (4096 - 3612) + 2048) >> 12) - t53;
t45a = ((t45 * -1189 + t50 * (3920 - 4096) + 2048) >> 12) + t50;
t46a = ((t46 * (4096 - 3920) + t49 * -1189 + 2048) >> 12) - t46;
t49a = ((t46 * -1189 + t49 * (3920 - 4096) + 2048) >> 12) + t49;
t50a = ((t45 * (3920 - 4096) + t50 * 1189 + 2048) >> 12) + t45;
t53a = ((t42 * (4096 - 3612) + t53 * 1931 + 2048) >> 12) - t42;
t54a = ((t41 * 1931 + t54 * (3612 - 4096) + 2048) >> 12) + t54;
t57a = (t38 * -1299 + t57 * 1583 + 1024) >> 11;
t58a = (t37 * 1583 + t58 * 1299 + 1024) >> 11;
t61a = ((t34 * (4096 - 4076) + t61 * 401 + 2048) >> 12) - t34;
t62a = ((t33 * 401 + t62 * (4076 - 4096) + 2048) >> 12) + t62;
t32a = CLIP(t32 + t35);
t33 = CLIP(t33a + t34a);
t34 = CLIP(t33a - t34a);
t35a = CLIP(t32 - t35);
t36a = CLIP(t39 - t36);
t37 = CLIP(t38a - t37a);
t38 = CLIP(t38a + t37a);
t39a = CLIP(t39 + t36);
t40a = CLIP(t40 + t43);
t41 = CLIP(t41a + t42a);
t42 = CLIP(t41a - t42a);
t43a = CLIP(t40 - t43);
t44a = CLIP(t47 - t44);
t45 = CLIP(t46a - t45a);
t46 = CLIP(t46a + t45a);
t47a = CLIP(t47 + t44);
t48a = CLIP(t48 + t51);
t49 = CLIP(t49a + t50a);
t50 = CLIP(t49a - t50a);
t51a = CLIP(t48 - t51);
t52a = CLIP(t55 - t52);
t53 = CLIP(t54a - t53a);
t54 = CLIP(t54a + t53a);
t55a = CLIP(t55 + t52);
t56a = CLIP(t56 + t59);
t57 = CLIP(t57a + t58a);
t58 = CLIP(t57a - t58a);
t59a = CLIP(t56 - t59);
t60a = CLIP(t63 - t60);
t61 = CLIP(t62a - t61a);
t62 = CLIP(t62a + t61a);
t63a = CLIP(t63 + t60);
t34a = ((t34 * (4096 - 4017) + t61 * 799 + 2048) >> 12) - t34;
t35 = ((t35a * (4096 - 4017) + t60a * 799 + 2048) >> 12) - t35a;
t36 = ((t36a * -799 + t59a * (4096 - 4017) + 2048) >> 12) - t59a;
t37a = ((t37 * -799 + t58 * (4096 - 4017) + 2048) >> 12) - t58;
t42a = (t42 * -1138 + t53 * 1703 + 1024) >> 11;
t43 = (t43a * -1138 + t52a * 1703 + 1024) >> 11;
t44 = (t44a * -1703 + t51a * -1138 + 1024) >> 11;
t45a = (t45 * -1703 + t50 * -1138 + 1024) >> 11;
t50a = (t45 * -1138 + t50 * 1703 + 1024) >> 11;
t51 = (t44a * -1138 + t51a * 1703 + 1024) >> 11;
t52 = (t43a * 1703 + t52a * 1138 + 1024) >> 11;
t53a = (t42 * 1703 + t53 * 1138 + 1024) >> 11;
t58a = ((t37 * (4096 - 4017) + t58 * 799 + 2048) >> 12) - t37;
t59 = ((t36a * (4096 - 4017) + t59a * 799 + 2048) >> 12) - t36a;
t60 = ((t35a * 799 + t60a * (4017 - 4096) + 2048) >> 12) + t60a;
t61a = ((t34 * 799 + t61 * (4017 - 4096) + 2048) >> 12) + t61;
t32 = CLIP(t32a + t39a);
t33a = CLIP(t33 + t38);
t34 = CLIP(t34a + t37a);
t35a = CLIP(t35 + t36);
t36a = CLIP(t35 - t36);
t37 = CLIP(t34a - t37a);
t38a = CLIP(t33 - t38);
t39 = CLIP(t32a - t39a);
t40 = CLIP(t47a - t40a);
t41a = CLIP(t46 - t41);
t42 = CLIP(t45a - t42a);
t43a = CLIP(t44 - t43);
t44a = CLIP(t44 + t43);
t45 = CLIP(t45a + t42a);
t46a = CLIP(t46 + t41);
t47 = CLIP(t47a + t40a);
t48 = CLIP(t48a + t55a);
t49a = CLIP(t49 + t54);
t50 = CLIP(t50a + t53a);
t51a = CLIP(t51 + t52);
t52a = CLIP(t51 - t52);
t53 = CLIP(t50a - t53a);
t54a = CLIP(t49 - t54);
t55 = CLIP(t48a - t55a);
t56 = CLIP(t63a - t56a);
t57a = CLIP(t62 - t57);
t58 = CLIP(t61a - t58a);
t59a = CLIP(t60 - t59);
t60a = CLIP(t60 + t59);
t61 = CLIP(t61a + t58a);
t62a = CLIP(t62 + t57);
t63 = CLIP(t63a + t56a);
t36 = ((t36a * (4096 - 3784) + t59a * 1567 + 2048) >> 12) - t36a;
t37a = ((t37 * (4096 - 3784) + t58 * 1567 + 2048) >> 12) - t37;
t38 = ((t38a * (4096 - 3784) + t57a * 1567 + 2048) >> 12) - t38a;
t39a = ((t39 * (4096 - 3784) + t56 * 1567 + 2048) >> 12) - t39;
t40a = ((t40 * -1567 + t55 * (4096 - 3784) + 2048) >> 12) - t55;
t41 = ((t41a * -1567 + t54a * (4096 - 3784) + 2048) >> 12) - t54a;
t42a = ((t42 * -1567 + t53 * (4096 - 3784) + 2048) >> 12) - t53;
t43 = ((t43a * -1567 + t52a * (4096 - 3784) + 2048) >> 12) - t52a;
t52 = ((t43a * (4096 - 3784) + t52a * 1567 + 2048) >> 12) - t43a;
t53a = ((t42 * (4096 - 3784) + t53 * 1567 + 2048) >> 12) - t42;
t54 = ((t41a * (4096 - 3784) + t54a * 1567 + 2048) >> 12) - t41a;
t55a = ((t40 * (4096 - 3784) + t55 * 1567 + 2048) >> 12) - t40;
t56a = ((t39 * 1567 + t56 * (3784 - 4096) + 2048) >> 12) + t56;
t57 = ((t38a * 1567 + t57a * (3784 - 4096) + 2048) >> 12) + t57a;
t58a = ((t37 * 1567 + t58 * (3784 - 4096) + 2048) >> 12) + t58;
t59 = ((t36a * 1567 + t59a * (3784 - 4096) + 2048) >> 12) + t59a;
t32a = CLIP(t32 + t47);
t33 = CLIP(t33a + t46a);
t34a = CLIP(t34 + t45);
t35 = CLIP(t35a + t44a);
t36a = CLIP(t36 + t43);
t37 = CLIP(t37a + t42a);
t38a = CLIP(t38 + t41);
t39 = CLIP(t39a + t40a);
t40 = CLIP(t39a - t40a);
t41a = CLIP(t38 - t41);
t42 = CLIP(t37a - t42a);
t43a = CLIP(t36 - t43);
t44 = CLIP(t35a - t44a);
t45a = CLIP(t34 - t45);
t46 = CLIP(t33a - t46a);
t47a = CLIP(t32 - t47);
t48a = CLIP(t63 - t48);
t49 = CLIP(t62a - t49a);
t50a = CLIP(t61 - t50);
t51 = CLIP(t60a - t51a);
t52a = CLIP(t59 - t52);
t53 = CLIP(t58a - t53a);
t54a = CLIP(t57 - t54);
t55 = CLIP(t56a - t55a);
t56 = CLIP(t56a + t55a);
t57a = CLIP(t57 + t54);
t58 = CLIP(t58a + t53a);
t59a = CLIP(t59 + t52);
t60 = CLIP(t60a + t51a);
t61a = CLIP(t61 + t50);
t62 = CLIP(t62a + t49a);
t63a = CLIP(t63 + t48);
t40a = ((t55 - t40 ) * 181 + 128) >> 8;
t41 = ((t54a - t41a) * 181 + 128) >> 8;
t42a = ((t53 - t42 ) * 181 + 128) >> 8;
t43 = ((t52a - t43a) * 181 + 128) >> 8;
t44a = ((t51 - t44 ) * 181 + 128) >> 8;
t45 = ((t50a - t45a) * 181 + 128) >> 8;
t46a = ((t49 - t46 ) * 181 + 128) >> 8;
t47 = ((t48a - t47a) * 181 + 128) >> 8;
t48 = ((t47a + t48a) * 181 + 128) >> 8;
t49a = ((t46 + t49 ) * 181 + 128) >> 8;
t50 = ((t45a + t50a) * 181 + 128) >> 8;
t51a = ((t44 + t51 ) * 181 + 128) >> 8;
t52 = ((t43a + t52a) * 181 + 128) >> 8;
t53a = ((t42 + t53 ) * 181 + 128) >> 8;
t54 = ((t41a + t54a) * 181 + 128) >> 8;
t55a = ((t40 + t55 ) * 181 + 128) >> 8;
const int t0 = c[ 0 * stride];
const int t1 = c[ 2 * stride];
const int t2 = c[ 4 * stride];
const int t3 = c[ 6 * stride];
const int t4 = c[ 8 * stride];
const int t5 = c[10 * stride];
const int t6 = c[12 * stride];
const int t7 = c[14 * stride];
const int t8 = c[16 * stride];
const int t9 = c[18 * stride];
const int t10 = c[20 * stride];
const int t11 = c[22 * stride];
const int t12 = c[24 * stride];
const int t13 = c[26 * stride];
const int t14 = c[28 * stride];
const int t15 = c[30 * stride];
const int t16 = c[32 * stride];
const int t17 = c[34 * stride];
const int t18 = c[36 * stride];
const int t19 = c[38 * stride];
const int t20 = c[40 * stride];
const int t21 = c[42 * stride];
const int t22 = c[44 * stride];
const int t23 = c[46 * stride];
const int t24 = c[48 * stride];
const int t25 = c[50 * stride];
const int t26 = c[52 * stride];
const int t27 = c[54 * stride];
const int t28 = c[56 * stride];
const int t29 = c[58 * stride];
const int t30 = c[60 * stride];
const int t31 = c[62 * stride];
c[ 0 * stride] = CLIP(t0 + t63a);
c[ 1 * stride] = CLIP(t1 + t62);
c[ 2 * stride] = CLIP(t2 + t61a);
c[ 3 * stride] = CLIP(t3 + t60);
c[ 4 * stride] = CLIP(t4 + t59a);
c[ 5 * stride] = CLIP(t5 + t58);
c[ 6 * stride] = CLIP(t6 + t57a);
c[ 7 * stride] = CLIP(t7 + t56);
c[ 8 * stride] = CLIP(t8 + t55a);
c[ 9 * stride] = CLIP(t9 + t54);
c[10 * stride] = CLIP(t10 + t53a);
c[11 * stride] = CLIP(t11 + t52);
c[12 * stride] = CLIP(t12 + t51a);
c[13 * stride] = CLIP(t13 + t50);
c[14 * stride] = CLIP(t14 + t49a);
c[15 * stride] = CLIP(t15 + t48);
c[16 * stride] = CLIP(t16 + t47);
c[17 * stride] = CLIP(t17 + t46a);
c[18 * stride] = CLIP(t18 + t45);
c[19 * stride] = CLIP(t19 + t44a);
c[20 * stride] = CLIP(t20 + t43);
c[21 * stride] = CLIP(t21 + t42a);
c[22 * stride] = CLIP(t22 + t41);
c[23 * stride] = CLIP(t23 + t40a);
c[24 * stride] = CLIP(t24 + t39);
c[25 * stride] = CLIP(t25 + t38a);
c[26 * stride] = CLIP(t26 + t37);
c[27 * stride] = CLIP(t27 + t36a);
c[28 * stride] = CLIP(t28 + t35);
c[29 * stride] = CLIP(t29 + t34a);
c[30 * stride] = CLIP(t30 + t33);
c[31 * stride] = CLIP(t31 + t32a);
c[32 * stride] = CLIP(t31 - t32a);
c[33 * stride] = CLIP(t30 - t33);
c[34 * stride] = CLIP(t29 - t34a);
c[35 * stride] = CLIP(t28 - t35);
c[36 * stride] = CLIP(t27 - t36a);
c[37 * stride] = CLIP(t26 - t37);
c[38 * stride] = CLIP(t25 - t38a);
c[39 * stride] = CLIP(t24 - t39);
c[40 * stride] = CLIP(t23 - t40a);
c[41 * stride] = CLIP(t22 - t41);
c[42 * stride] = CLIP(t21 - t42a);
c[43 * stride] = CLIP(t20 - t43);
c[44 * stride] = CLIP(t19 - t44a);
c[45 * stride] = CLIP(t18 - t45);
c[46 * stride] = CLIP(t17 - t46a);
c[47 * stride] = CLIP(t16 - t47);
c[48 * stride] = CLIP(t15 - t48);
c[49 * stride] = CLIP(t14 - t49a);
c[50 * stride] = CLIP(t13 - t50);
c[51 * stride] = CLIP(t12 - t51a);
c[52 * stride] = CLIP(t11 - t52);
c[53 * stride] = CLIP(t10 - t53a);
c[54 * stride] = CLIP(t9 - t54);
c[55 * stride] = CLIP(t8 - t55a);
c[56 * stride] = CLIP(t7 - t56);
c[57 * stride] = CLIP(t6 - t57a);
c[58 * stride] = CLIP(t5 - t58);
c[59 * stride] = CLIP(t4 - t59a);
c[60 * stride] = CLIP(t3 - t60);
c[61 * stride] = CLIP(t2 - t61a);
c[62 * stride] = CLIP(t1 - t62);
c[63 * stride] = CLIP(t0 - t63a);
}
static NOINLINE void
inv_adst4_1d_internal_c(const int32_t *const in, const ptrdiff_t in_s,
const int min, const int max,
int32_t *const out, const ptrdiff_t out_s)
{
assert(in_s > 0 && out_s != 0);
const int in0 = in[0 * in_s], in1 = in[1 * in_s];
const int in2 = in[2 * in_s], in3 = in[3 * in_s];
out[0 * out_s] = (( 1321 * in0 + (3803 - 4096) * in2 +
(2482 - 4096) * in3 + (3344 - 4096) * in1 + 2048) >> 12) +
in2 + in3 + in1;
out[1 * out_s] = (((2482 - 4096) * in0 - 1321 * in2 -
(3803 - 4096) * in3 + (3344 - 4096) * in1 + 2048) >> 12) +
in0 - in3 + in1;
out[2 * out_s] = (209 * (in0 - in2 + in3) + 128) >> 8;
out[3 * out_s] = (((3803 - 4096) * in0 + (2482 - 4096) * in2 -
1321 * in3 - (3344 - 4096) * in1 + 2048) >> 12) +
in0 + in2 - in1;
}
static NOINLINE void
inv_adst8_1d_internal_c(const int32_t *const in, const ptrdiff_t in_s,
const int min, const int max,
int32_t *const out, const ptrdiff_t out_s)
{
assert(in_s > 0 && out_s != 0);
const int in0 = in[0 * in_s], in1 = in[1 * in_s];
const int in2 = in[2 * in_s], in3 = in[3 * in_s];
const int in4 = in[4 * in_s], in5 = in[5 * in_s];
const int in6 = in[6 * in_s], in7 = in[7 * in_s];
const int t0a = (((4076 - 4096) * in7 + 401 * in0 + 2048) >> 12) + in7;
const int t1a = (( 401 * in7 - (4076 - 4096) * in0 + 2048) >> 12) - in0;
const int t2a = (((3612 - 4096) * in5 + 1931 * in2 + 2048) >> 12) + in5;
const int t3a = (( 1931 * in5 - (3612 - 4096) * in2 + 2048) >> 12) - in2;
int t4a = ( 1299 * in3 + 1583 * in4 + 1024) >> 11;
int t5a = ( 1583 * in3 - 1299 * in4 + 1024) >> 11;
int t6a = (( 1189 * in1 + (3920 - 4096) * in6 + 2048) >> 12) + in6;
int t7a = (((3920 - 4096) * in1 - 1189 * in6 + 2048) >> 12) + in1;
const int t0 = CLIP(t0a + t4a);
const int t1 = CLIP(t1a + t5a);
int t2 = CLIP(t2a + t6a);
int t3 = CLIP(t3a + t7a);
const int t4 = CLIP(t0a - t4a);
const int t5 = CLIP(t1a - t5a);
int t6 = CLIP(t2a - t6a);
int t7 = CLIP(t3a - t7a);
t4a = (((3784 - 4096) * t4 + 1567 * t5 + 2048) >> 12) + t4;
t5a = (( 1567 * t4 - (3784 - 4096) * t5 + 2048) >> 12) - t5;
t6a = (((3784 - 4096) * t7 - 1567 * t6 + 2048) >> 12) + t7;
t7a = (( 1567 * t7 + (3784 - 4096) * t6 + 2048) >> 12) + t6;
out[0 * out_s] = CLIP(t0 + t2 );
out[7 * out_s] = -CLIP(t1 + t3 );
t2 = CLIP(t0 - t2 );
t3 = CLIP(t1 - t3 );
out[1 * out_s] = -CLIP(t4a + t6a);
out[6 * out_s] = CLIP(t5a + t7a);
t6 = CLIP(t4a - t6a);
t7 = CLIP(t5a - t7a);
out[3 * out_s] = -(((t2 + t3) * 181 + 128) >> 8);
out[4 * out_s] = ((t2 - t3) * 181 + 128) >> 8;
out[2 * out_s] = ((t6 + t7) * 181 + 128) >> 8;
out[5 * out_s] = -(((t6 - t7) * 181 + 128) >> 8);
}
static NOINLINE void
inv_adst16_1d_internal_c(const int32_t *const in, const ptrdiff_t in_s,
const int min, const int max,
int32_t *const out, const ptrdiff_t out_s)
{
assert(in_s > 0 && out_s != 0);
const int in0 = in[ 0 * in_s], in1 = in[ 1 * in_s];
const int in2 = in[ 2 * in_s], in3 = in[ 3 * in_s];
const int in4 = in[ 4 * in_s], in5 = in[ 5 * in_s];
const int in6 = in[ 6 * in_s], in7 = in[ 7 * in_s];
const int in8 = in[ 8 * in_s], in9 = in[ 9 * in_s];
const int in10 = in[10 * in_s], in11 = in[11 * in_s];
const int in12 = in[12 * in_s], in13 = in[13 * in_s];
const int in14 = in[14 * in_s], in15 = in[15 * in_s];
int t0 = ((in15 * (4091 - 4096) + in0 * 201 + 2048) >> 12) + in15;
int t1 = ((in15 * 201 - in0 * (4091 - 4096) + 2048) >> 12) - in0;
int t2 = ((in13 * (3973 - 4096) + in2 * 995 + 2048) >> 12) + in13;
int t3 = ((in13 * 995 - in2 * (3973 - 4096) + 2048) >> 12) - in2;
int t4 = ((in11 * (3703 - 4096) + in4 * 1751 + 2048) >> 12) + in11;
int t5 = ((in11 * 1751 - in4 * (3703 - 4096) + 2048) >> 12) - in4;
int t6 = (in9 * 1645 + in6 * 1220 + 1024) >> 11;
int t7 = (in9 * 1220 - in6 * 1645 + 1024) >> 11;
int t8 = ((in7 * 2751 + in8 * (3035 - 4096) + 2048) >> 12) + in8;
int t9 = ((in7 * (3035 - 4096) - in8 * 2751 + 2048) >> 12) + in7;
int t10 = ((in5 * 2106 + in10 * (3513 - 4096) + 2048) >> 12) + in10;
int t11 = ((in5 * (3513 - 4096) - in10 * 2106 + 2048) >> 12) + in5;
int t12 = ((in3 * 1380 + in12 * (3857 - 4096) + 2048) >> 12) + in12;
int t13 = ((in3 * (3857 - 4096) - in12 * 1380 + 2048) >> 12) + in3;
int t14 = ((in1 * 601 + in14 * (4052 - 4096) + 2048) >> 12) + in14;
int t15 = ((in1 * (4052 - 4096) - in14 * 601 + 2048) >> 12) + in1;
int t0a = CLIP(t0 + t8 );
int t1a = CLIP(t1 + t9 );
int t2a = CLIP(t2 + t10);
int t3a = CLIP(t3 + t11);
int t4a = CLIP(t4 + t12);
int t5a = CLIP(t5 + t13);
int t6a = CLIP(t6 + t14);
int t7a = CLIP(t7 + t15);
int t8a = CLIP(t0 - t8 );
int t9a = CLIP(t1 - t9 );
int t10a = CLIP(t2 - t10);
int t11a = CLIP(t3 - t11);
int t12a = CLIP(t4 - t12);
int t13a = CLIP(t5 - t13);
int t14a = CLIP(t6 - t14);
int t15a = CLIP(t7 - t15);
t8 = ((t8a * (4017 - 4096) + t9a * 799 + 2048) >> 12) + t8a;
t9 = ((t8a * 799 - t9a * (4017 - 4096) + 2048) >> 12) - t9a;
t10 = ((t10a * 2276 + t11a * (3406 - 4096) + 2048) >> 12) + t11a;
t11 = ((t10a * (3406 - 4096) - t11a * 2276 + 2048) >> 12) + t10a;
t12 = ((t13a * (4017 - 4096) - t12a * 799 + 2048) >> 12) + t13a;
t13 = ((t13a * 799 + t12a * (4017 - 4096) + 2048) >> 12) + t12a;
t14 = ((t15a * 2276 - t14a * (3406 - 4096) + 2048) >> 12) - t14a;
t15 = ((t15a * (3406 - 4096) + t14a * 2276 + 2048) >> 12) + t15a;
t0 = CLIP(t0a + t4a);
t1 = CLIP(t1a + t5a);
t2 = CLIP(t2a + t6a);
t3 = CLIP(t3a + t7a);
t4 = CLIP(t0a - t4a);
t5 = CLIP(t1a - t5a);
t6 = CLIP(t2a - t6a);
t7 = CLIP(t3a - t7a);
t8a = CLIP(t8 + t12);
t9a = CLIP(t9 + t13);
t10a = CLIP(t10 + t14);
t11a = CLIP(t11 + t15);
t12a = CLIP(t8 - t12);
t13a = CLIP(t9 - t13);
t14a = CLIP(t10 - t14);
t15a = CLIP(t11 - t15);
t4a = ((t4 * (3784 - 4096) + t5 * 1567 + 2048) >> 12) + t4;
t5a = ((t4 * 1567 - t5 * (3784 - 4096) + 2048) >> 12) - t5;
t6a = ((t7 * (3784 - 4096) - t6 * 1567 + 2048) >> 12) + t7;
t7a = ((t7 * 1567 + t6 * (3784 - 4096) + 2048) >> 12) + t6;
t12 = ((t12a * (3784 - 4096) + t13a * 1567 + 2048) >> 12) + t12a;
t13 = ((t12a * 1567 - t13a * (3784 - 4096) + 2048) >> 12) - t13a;
t14 = ((t15a * (3784 - 4096) - t14a * 1567 + 2048) >> 12) + t15a;
t15 = ((t15a * 1567 + t14a * (3784 - 4096) + 2048) >> 12) + t14a;
out[ 0 * out_s] = CLIP(t0 + t2 );
out[15 * out_s] = -CLIP(t1 + t3 );
t2a = CLIP(t0 - t2 );
t3a = CLIP(t1 - t3 );
out[ 3 * out_s] = -CLIP(t4a + t6a );
out[12 * out_s] = CLIP(t5a + t7a );
t6 = CLIP(t4a - t6a );
t7 = CLIP(t5a - t7a );
out[ 1 * out_s] = -CLIP(t8a + t10a);
out[14 * out_s] = CLIP(t9a + t11a);
t10 = CLIP(t8a - t10a);
t11 = CLIP(t9a - t11a);
out[ 2 * out_s] = CLIP(t12 + t14 );
out[13 * out_s] = -CLIP(t13 + t15 );
t14a = CLIP(t12 - t14 );
t15a = CLIP(t13 - t15 );
out[ 7 * out_s] = -(((t2a + t3a) * 181 + 128) >> 8);
out[ 8 * out_s] = ((t2a - t3a) * 181 + 128) >> 8;
out[ 4 * out_s] = ((t6 + t7) * 181 + 128) >> 8;
out[11 * out_s] = -(((t6 - t7) * 181 + 128) >> 8);
out[ 6 * out_s] = ((t10 + t11) * 181 + 128) >> 8;
out[ 9 * out_s] = -(((t10 - t11) * 181 + 128) >> 8);
out[ 5 * out_s] = -(((t14a + t15a) * 181 + 128) >> 8);
out[10 * out_s] = ((t14a - t15a) * 181 + 128) >> 8;
}
#define inv_adst_1d(sz) \
static void inv_adst##sz##_1d_c(int32_t *const c, const ptrdiff_t stride, \
const int min, const int max) \
{ \
inv_adst##sz##_1d_internal_c(c, stride, min, max, c, stride); \
} \
static void inv_flipadst##sz##_1d_c(int32_t *const c, const ptrdiff_t stride, \
const int min, const int max) \
{ \
inv_adst##sz##_1d_internal_c(c, stride, min, max, \
&c[(sz - 1) * stride], -stride); \
}
inv_adst_1d( 4)
inv_adst_1d( 8)
inv_adst_1d(16)
#undef inv_adst_1d
static void inv_identity4_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
assert(stride > 0);
for (int i = 0; i < 4; i++) {
const int in = c[stride * i];
c[stride * i] = in + ((in * 1697 + 2048) >> 12);
}
}
static void inv_identity8_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
assert(stride > 0);
for (int i = 0; i < 8; i++)
c[stride * i] *= 2;
}
static void inv_identity16_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
assert(stride > 0);
for (int i = 0; i < 16; i++) {
const int in = c[stride * i];
c[stride * i] = 2 * in + ((in * 1697 + 1024) >> 11);
}
}
static void inv_identity32_1d_c(int32_t *const c, const ptrdiff_t stride,
const int min, const int max)
{
assert(stride > 0);
for (int i = 0; i < 32; i++)
c[stride * i] *= 4;
}
const itx_1d_fn dav1d_tx1d_fns[N_TX_SIZES][N_TX_1D_TYPES] = {
[TX_4X4] = {
[DCT] = inv_dct4_1d_c,
[ADST] = inv_adst4_1d_c,
[FLIPADST] = inv_flipadst4_1d_c,
[IDENTITY] = inv_identity4_1d_c,
}, [TX_8X8] = {
[DCT] = inv_dct8_1d_c,
[ADST] = inv_adst8_1d_c,
[FLIPADST] = inv_flipadst8_1d_c,
[IDENTITY] = inv_identity8_1d_c,
}, [TX_16X16] = {
[DCT] = inv_dct16_1d_c,
[ADST] = inv_adst16_1d_c,
[FLIPADST] = inv_flipadst16_1d_c,
[IDENTITY] = inv_identity16_1d_c,
}, [TX_32X32] = {
[DCT] = inv_dct32_1d_c,
[IDENTITY] = inv_identity32_1d_c,
}, [TX_64X64] = {
[DCT] = inv_dct64_1d_c,
},
};
const uint8_t /* enum Tx1dType */ dav1d_tx1d_types[N_TX_TYPES][2] = {
[DCT_DCT] = { DCT, DCT },
[ADST_DCT] = { ADST, DCT },
[DCT_ADST] = { DCT, ADST },
[ADST_ADST] = { ADST, ADST },
[FLIPADST_DCT] = { FLIPADST, DCT },
[DCT_FLIPADST] = { DCT, FLIPADST },
[FLIPADST_FLIPADST] = { FLIPADST, FLIPADST },
[ADST_FLIPADST] = { ADST, FLIPADST },
[FLIPADST_ADST] = { FLIPADST, ADST },
[IDTX] = { IDENTITY, IDENTITY },
[V_DCT] = { DCT, IDENTITY },
[H_DCT] = { IDENTITY, DCT },
[V_ADST] = { ADST, IDENTITY },
[H_ADST] = { IDENTITY, ADST },
[V_FLIPADST] = { FLIPADST, IDENTITY },
[H_FLIPADST] = { IDENTITY, FLIPADST },
};
#if !(HAVE_ASM && TRIM_DSP_FUNCTIONS && ( \
ARCH_AARCH64 || \
(ARCH_ARM && (defined(__ARM_NEON) || defined(__APPLE__) || defined(_WIN32))) \
))
void dav1d_inv_wht4_1d_c(int32_t *const c, const ptrdiff_t stride) {
assert(stride > 0);
const int in0 = c[0 * stride], in1 = c[1 * stride];
const int in2 = c[2 * stride], in3 = c[3 * stride];
const int t0 = in0 + in1;
const int t2 = in2 - in3;
const int t4 = (t0 - t2) >> 1;
const int t3 = t4 - in3;
const int t1 = t4 - in1;
c[0 * stride] = t0 - t3;
c[1 * stride] = t3;
c[2 * stride] = t1;
c[3 * stride] = t2 + t1;
}
#endif