548b4dd5f2
Removing redundant 'extern' keywords and parentheses, fixing indentation, making variable names lower case, using short expressions x *= c instead of x = x * c, minor code simplifications. Change-Id: If6a25fcf306d1db26e90d27e3c24a32735c607de
1641 lines
49 KiB
C
1641 lines
49 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/****************************************************************************
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* Notes:
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*
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* This implementation makes use of 16 bit fixed point verio of two multiply
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* constants:
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* 1. sqrt(2) * cos (pi/8)
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* 2. sqrt(2) * sin (pi/8)
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* Becuase the first constant is bigger than 1, to maintain the same 16 bit
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* fixed point precision as the second one, we use a trick of
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* x * a = x + x*(a-1)
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* so
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* x * sqrt(2) * cos (pi/8) = x + x * (sqrt(2) *cos(pi/8)-1).
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**************************************************************************/
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#include <assert.h>
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#include <math.h>
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#include "./vpx_config.h"
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#include "vp9/common/vp9_systemdependent.h"
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#include "vp9/common/vp9_blockd.h"
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#include "vp9/common/vp9_common.h"
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#include "vp9/common/vp9_idct.h"
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static const int16_t idct_i4[16] = {
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8192, 10703, 8192, 4433,
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8192, 4433, -8192, -10703,
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8192, -4433, -8192, 10703,
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8192, -10703, 8192, -4433
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};
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static const int16_t iadst_i4[16] = {
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3736, 9459, 10757, 7021,
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7021, 9459, -3736, -10757,
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9459, 0, -9459, 9459,
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10757, -9459, 7021, -3736
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};
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static const int16_t idct_i8[64] = {
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5793, 8035, 7568, 6811,
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5793, 4551, 3135, 1598,
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5793, 6811, 3135, -1598,
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-5793, -8035, -7568, -4551,
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5793, 4551, -3135, -8035,
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-5793, 1598, 7568, 6811,
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5793, 1598, -7568, -4551,
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5793, 6811, -3135, -8035,
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5793, -1598, -7568, 4551,
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5793, -6811, -3135, 8035,
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5793, -4551, -3135, 8035,
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-5793, -1598, 7568, -6811,
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5793, -6811, 3135, 1598,
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-5793, 8035, -7568, 4551,
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5793, -8035, 7568, -6811,
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5793, -4551, 3135, -1598
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};
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static const int16_t iadst_i8[64] = {
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1460, 4184, 6342, 7644,
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7914, 7114, 5354, 2871,
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2871, 7114, 7644, 4184,
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-1460, -6342, -7914, -5354,
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4184, 7914, 2871, -5354,
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-7644, -1460, 6342, 7114,
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5354, 6342, -4184, -7114,
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2871, 7644, -1460, -7914,
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6342, 2871, -7914, 1460,
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7114, -5354, -4184, 7644,
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7114, -1460, -5354, 7914,
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-4184, -2871, 7644, -6342,
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7644, -5354, 1460, 2871,
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-6342, 7914, -7114, 4184,
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7914, -7644, 7114, -6342,
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5354, -4184, 2871, -1460
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};
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static const int16_t idct_i16[256] = {
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4096, 5765, 5681, 5543, 5352, 5109, 4816, 4478,
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4096, 3675, 3218, 2731, 2217, 1682, 1130, 568,
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4096, 5543, 4816, 3675, 2217, 568, -1130, -2731,
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-4096, -5109, -5681, -5765, -5352, -4478, -3218, -1682,
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4096, 5109, 3218, 568, -2217, -4478, -5681, -5543,
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-4096, -1682, 1130, 3675, 5352, 5765, 4816, 2731,
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4096, 4478, 1130, -2731, -5352, -5543, -3218, 568,
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4096, 5765, 4816, 1682, -2217, -5109, -5681, -3675,
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4096, 3675, -1130, -5109, -5352, -1682, 3218, 5765,
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4096, -568, -4816, -5543, -2217, 2731, 5681, 4478,
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4096, 2731, -3218, -5765, -2217, 3675, 5681, 1682,
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-4096, -5543, -1130, 4478, 5352, 568, -4816, -5109,
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4096, 1682, -4816, -4478, 2217, 5765, 1130, -5109,
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-4096, 2731, 5681, 568, -5352, -3675, 3218, 5543,
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4096, 568, -5681, -1682, 5352, 2731, -4816, -3675,
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4096, 4478, -3218, -5109, 2217, 5543, -1130, -5765,
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4096, -568, -5681, 1682, 5352, -2731, -4816, 3675,
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4096, -4478, -3218, 5109, 2217, -5543, -1130, 5765,
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4096, -1682, -4816, 4478, 2217, -5765, 1130, 5109,
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-4096, -2731, 5681, -568, -5352, 3675, 3218, -5543,
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4096, -2731, -3218, 5765, -2217, -3675, 5681, -1682,
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-4096, 5543, -1130, -4478, 5352, -568, -4816, 5109,
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4096, -3675, -1130, 5109, -5352, 1682, 3218, -5765,
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4096, 568, -4816, 5543, -2217, -2731, 5681, -4478,
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4096, -4478, 1130, 2731, -5352, 5543, -3218, -568,
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4096, -5765, 4816, -1682, -2217, 5109, -5681, 3675,
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4096, -5109, 3218, -568, -2217, 4478, -5681, 5543,
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-4096, 1682, 1130, -3675, 5352, -5765, 4816, -2731,
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4096, -5543, 4816, -3675, 2217, -568, -1130, 2731,
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-4096, 5109, -5681, 5765, -5352, 4478, -3218, 1682,
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4096, -5765, 5681, -5543, 5352, -5109, 4816, -4478,
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4096, -3675, 3218, -2731, 2217, -1682, 1130, -568
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};
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#if CONFIG_INTHT
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static const int16_t iadst_i16[256] = {
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284, 850, 1407, 1951, 2476, 2977, 3450, 3889,
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4291, 4652, 4967, 5235, 5453, 5618, 5729, 5784,
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850, 2476, 3889, 4967, 5618, 5784, 5453, 4652,
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3450, 1951, 284, -1407, -2977, -4291, -5235, -5729,
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1407, 3889, 5453, 5729, 4652, 2476, -284, -2977,
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-4967, -5784, -5235, -3450, -850, 1951, 4291, 5618,
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1951, 4967, 5729, 3889, 284, -3450, -5618, -5235,
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-2476, 1407, 4652, 5784, 4291, 850, -2977, -5453,
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2476, 5618, 4652, 284, -4291, -5729, -2977, 1951,
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5453, 4967, 850, -3889, -5784, -3450, 1407, 5235,
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2977, 5784, 2476, -3450, -5729, -1951, 3889, 5618,
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1407, -4291, -5453, -850, 4652, 5235, 284, -4967,
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3450, 5453, -284, -5618, -2977, 3889, 5235, -850,
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-5729, -2476, 4291, 4967, -1407, -5784, -1951, 4652,
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3889, 4652, -2977, -5235, 1951, 5618, -850, -5784,
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-284, 5729, 1407, -5453, -2476, 4967, 3450, -4291,
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4291, 3450, -4967, -2476, 5453, 1407, -5729, -284,
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5784, -850, -5618, 1951, 5235, -2977, -4652, 3889,
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4652, 1951, -5784, 1407, 4967, -4291, -2476, 5729,
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-850, -5235, 3889, 2977, -5618, 284, 5453, -3450,
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4967, 284, -5235, 4652, 850, -5453, 4291, 1407,
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-5618, 3889, 1951, -5729, 3450, 2476, -5784, 2977,
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5235, -1407, -3450, 5784, -3889, -850, 4967, -5453,
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1951, 2977, -5729, 4291, 284, -4652, 5618, -2476,
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5453, -2977, -850, 4291, -5784, 4652, -1407, -2476,
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5235, -5618, 3450, 284, -3889, 5729, -4967, 1951,
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5618, -4291, 1951, 850, -3450, 5235, -5784, 4967,
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-2977, 284, 2476, -4652, 5729, -5453, 3889, -1407,
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5729, -5235, 4291, -2977, 1407, 284, -1951, 3450,
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-4652, 5453, -5784, 5618, -4967, 3889, -2476, 850,
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5784, -5729, 5618, -5453, 5235, -4967, 4652, -4291,
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3889, -3450, 2977, -2476, 1951, -1407, 850, -284
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};
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#else
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static const int16_t iadst_i16[256] = {
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542, 1607, 2614, 3526, 4311, 4940, 5390, 5646,
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5698, 5543, 5189, 4646, 3936, 3084, 2120, 1080,
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1080, 3084, 4646, 5543, 5646, 4940, 3526, 1607,
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-542, -2614, -4311, -5390, -5698, -5189, -3936, -2120,
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1607, 4311, 5646, 5189, 3084, 0, -3084, -5189,
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-5646, -4311, -1607, 1607, 4311, 5646, 5189, 3084,
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2120, 5189, 5390, 2614, -1607, -4940, -5543, -3084,
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1080, 4646, 5646, 3526, -542, -4311, -5698, -3936,
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2614, 5646, 3936, -1080, -5189, -4940, -542, 4311,
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5543, 2120, -3084, -5698, -3526, 1607, 5390, 4646,
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3084, 5646, 1607, -4311, -5189, 0, 5189, 4311,
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-1607, -5646, -3084, 3084, 5646, 1607, -4311, -5189,
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3526, 5189, -1080, -5698, -1607, 4940, 3936, -3084,
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-5390, 542, 5646, 2120, -4646, -4311, 2614, 5543,
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3936, 4311, -3526, -4646, 3084, 4940, -2614, -5189,
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2120, 5390, -1607, -5543, 1080, 5646, -542, -5698,
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4311, 3084, -5189, -1607, 5646, 0, -5646, 1607,
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5189, -3084, -4311, 4311, 3084, -5189, -1607, 5646,
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4646, 1607, -5698, 2120, 4311, -4940, -1080, 5646,
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-2614, -3936, 5189, 542, -5543, 3084, 3526, -5390,
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4940, 0, -4940, 4940, 0, -4940, 4940, 0,
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-4940, 4940, 0, -4940, 4940, 0, -4940, 4940,
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5189, -1607, -3084, 5646, -4311, 0, 4311, -5646,
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3084, 1607, -5189, 5189, -1607, -3084, 5646, -4311,
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5390, -3084, -542, 3936, -5646, 4940, -2120, -1607,
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4646, -5698, 4311, -1080, -2614, 5189, -5543, 3526,
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5543, -4311, 2120, 542, -3084, 4940, -5698, 5189,
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-3526, 1080, 1607, -3936, 5390, -5646, 4646, -2614,
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5646, -5189, 4311, -3084, 1607, 0, -1607, 3084,
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-4311, 5189, -5646, 5646, -5189, 4311, -3084, 1607,
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5698, -5646, 5543, -5390, 5189, -4940, 4646, -4311,
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3936, -3526, 3084, -2614, 2120, -1607, 1080, -542
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};
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#endif
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/* Converted the transforms to integer form. */
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#define HORIZONTAL_SHIFT 14 // 16
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#define HORIZONTAL_ROUNDING ((1 << (HORIZONTAL_SHIFT - 1)) - 1)
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#define VERTICAL_SHIFT 17 // 15
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#define VERTICAL_ROUNDING ((1 << (VERTICAL_SHIFT - 1)) - 1)
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void vp9_ihtllm_c(const int16_t *input, int16_t *output, int pitch,
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TX_TYPE tx_type, int tx_dim, uint16_t eobs) {
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int i, j, k;
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int nz_dim;
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int16_t imbuf[256];
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const int16_t *ip = input;
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int16_t *op = output;
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int16_t *im = &imbuf[0];
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/* pointers to vertical and horizontal transforms. */
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const int16_t *ptv = NULL, *pth = NULL;
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int shortpitch = pitch >> 1;
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switch (tx_type) {
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case ADST_ADST :
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ptv = pth = (tx_dim == 4) ? &iadst_i4[0]
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: ((tx_dim == 8) ? &iadst_i8[0]
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: &iadst_i16[0]);
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break;
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case ADST_DCT :
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ptv = (tx_dim == 4) ? &iadst_i4[0]
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: ((tx_dim == 8) ? &iadst_i8[0] : &iadst_i16[0]);
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pth = (tx_dim == 4) ? &idct_i4[0]
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: ((tx_dim == 8) ? &idct_i8[0] : &idct_i16[0]);
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break;
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case DCT_ADST :
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ptv = (tx_dim == 4) ? &idct_i4[0]
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: ((tx_dim == 8) ? &idct_i8[0] : &idct_i16[0]);
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pth = (tx_dim == 4) ? &iadst_i4[0]
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: ((tx_dim == 8) ? &iadst_i8[0] : &iadst_i16[0]);
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break;
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case DCT_DCT :
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ptv = pth = (tx_dim == 4) ? &idct_i4[0]
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: ((tx_dim == 8) ? &idct_i8[0]
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: &idct_i16[0]);
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break;
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default:
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assert(0);
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break;
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}
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nz_dim = tx_dim;
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if(tx_dim > 4) {
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if(eobs < 36) {
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vpx_memset(im, 0, 512);
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nz_dim = 8;
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if(eobs < 3) {
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nz_dim = 2;
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} else if(eobs < 10) {
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nz_dim = 4;
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}
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}
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}
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/* 2-D inverse transform X = M1*Z*Transposed_M2 is calculated in 2 steps
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* from right to left:
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* 1. horizontal transform: Y= Z*Transposed_M2
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* 2. vertical transform: X = M1*Y
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* In SIMD, doing this way could eliminate the transpose needed if it is
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* calculated from left to right.
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*/
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/* Horizontal transformation */
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for (j = 0; j < tx_dim; j++) {
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for (i = 0; i < nz_dim; i++) {
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int temp = 0;
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for (k = 0; k < nz_dim; k++) {
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temp += ip[k] * pth[k];
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}
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/* Calculate im and store it in its transposed position. */
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im[i] = (int16_t)((temp + HORIZONTAL_ROUNDING) >> HORIZONTAL_SHIFT);
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ip += tx_dim;
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}
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im += tx_dim;
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pth += tx_dim;
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ip = input;
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}
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/* Vertical transformation */
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im = &imbuf[0];
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for (i = 0; i < tx_dim; i++) {
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for (j = 0; j < tx_dim; j++) {
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int temp = 0;
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for (k = 0; k < nz_dim; k++) {
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temp += ptv[k] * im[k];
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}
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op[j] = (int16_t)((temp + VERTICAL_ROUNDING) >> VERTICAL_SHIFT);
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im += tx_dim;
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}
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im = &imbuf[0];
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ptv += tx_dim;
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op += shortpitch;
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}
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}
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void vp9_short_inv_walsh4x4_x8_c(int16_t *input, int16_t *output, int pitch) {
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int i;
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int a1, b1, c1, d1;
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int16_t *ip = input;
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int16_t *op = output;
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int shortpitch = pitch >> 1;
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for (i = 0; i < 4; i++) {
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a1 = ((ip[0] + ip[3])) >> WHT_UPSCALE_FACTOR;
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b1 = ((ip[1] + ip[2])) >> WHT_UPSCALE_FACTOR;
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c1 = ((ip[1] - ip[2])) >> WHT_UPSCALE_FACTOR;
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d1 = ((ip[0] - ip[3])) >> WHT_UPSCALE_FACTOR;
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op[0] = (a1 + b1 + 1) >> 1;
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op[1] = (c1 + d1) >> 1;
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op[2] = (a1 - b1) >> 1;
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op[3] = (d1 - c1) >> 1;
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ip += 4;
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op += shortpitch;
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}
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ip = output;
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op = output;
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for (i = 0; i < 4; i++) {
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a1 = ip[shortpitch * 0] + ip[shortpitch * 3];
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b1 = ip[shortpitch * 1] + ip[shortpitch * 2];
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c1 = ip[shortpitch * 1] - ip[shortpitch * 2];
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d1 = ip[shortpitch * 0] - ip[shortpitch * 3];
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op[shortpitch * 0] = (a1 + b1 + 1) >> 1;
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op[shortpitch * 1] = (c1 + d1) >> 1;
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op[shortpitch * 2] = (a1 - b1) >> 1;
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op[shortpitch * 3] = (d1 - c1) >> 1;
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ip++;
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op++;
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}
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}
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void vp9_short_inv_walsh4x4_1_x8_c(int16_t *in, int16_t *out, int pitch) {
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int i;
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int16_t tmp[4];
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int16_t *ip = in;
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int16_t *op = tmp;
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int shortpitch = pitch >> 1;
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op[0] = ((ip[0] >> WHT_UPSCALE_FACTOR) + 1) >> 1;
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op[1] = op[2] = op[3] = ((ip[0] >> WHT_UPSCALE_FACTOR) >> 1);
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ip = tmp;
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op = out;
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for (i = 0; i < 4; i++) {
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op[shortpitch * 0] = (ip[0] + 1) >> 1;
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op[shortpitch * 1] = op[shortpitch * 2] = op[shortpitch * 3] = ip[0] >> 1;
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ip++;
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op++;
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}
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}
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void vp9_dc_only_inv_walsh_add_c(int input_dc, uint8_t *pred_ptr,
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uint8_t *dst_ptr,
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int pitch, int stride) {
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|
int r, c;
|
|
int16_t dc = input_dc;
|
|
int16_t tmp[16];
|
|
vp9_short_inv_walsh4x4_1_x8_c(&dc, tmp, 4 << 1);
|
|
|
|
for (r = 0; r < 4; r++) {
|
|
for (c = 0; c < 4; c++) {
|
|
dst_ptr[c] = clip_pixel(tmp[r * 4 + c] + pred_ptr[c]);
|
|
}
|
|
|
|
dst_ptr += stride;
|
|
pred_ptr += pitch;
|
|
}
|
|
}
|
|
|
|
void idct4_1d(int16_t *input, int16_t *output) {
|
|
int16_t step[4];
|
|
int temp1, temp2;
|
|
// stage 1
|
|
temp1 = (input[0] + input[2]) * cospi_16_64;
|
|
temp2 = (input[0] - input[2]) * cospi_16_64;
|
|
step[0] = dct_const_round_shift(temp1);
|
|
step[1] = dct_const_round_shift(temp2);
|
|
temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64;
|
|
temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64;
|
|
step[2] = dct_const_round_shift(temp1);
|
|
step[3] = dct_const_round_shift(temp2);
|
|
|
|
// stage 2
|
|
output[0] = step[0] + step[3];
|
|
output[1] = step[1] + step[2];
|
|
output[2] = step[1] - step[2];
|
|
output[3] = step[0] - step[3];
|
|
}
|
|
|
|
void vp9_short_idct4x4llm_c(int16_t *input, int16_t *output, int pitch) {
|
|
int16_t out[4 * 4];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[4], temp_out[4];
|
|
// First transform rows
|
|
for (i = 0; i < 4; ++i) {
|
|
for (j = 0; j < 4; ++j)
|
|
temp_in[j] = input[j];
|
|
idct4_1d(temp_in, outptr);
|
|
input += 4;
|
|
outptr += 4;
|
|
}
|
|
// Then transform columns
|
|
for (i = 0; i < 4; ++i) {
|
|
for (j = 0; j < 4; ++j)
|
|
temp_in[j] = out[j * 4 + i];
|
|
idct4_1d(temp_in, temp_out);
|
|
for (j = 0; j < 4; ++j)
|
|
output[j * short_pitch + i] = (temp_out[j] + 8) >> 4;
|
|
}
|
|
}
|
|
|
|
void vp9_short_idct4x4llm_1_c(int16_t *input, int16_t *output, int pitch) {
|
|
int i;
|
|
int a1;
|
|
int16_t *op = output;
|
|
int shortpitch = pitch >> 1;
|
|
int tmp;
|
|
int16_t out;
|
|
tmp = input[0] * cospi_16_64;
|
|
out = dct_const_round_shift(tmp);
|
|
tmp = out * cospi_16_64;
|
|
out = dct_const_round_shift(tmp);
|
|
a1 = (out + 8) >> 4;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
op[0] = a1;
|
|
op[1] = a1;
|
|
op[2] = a1;
|
|
op[3] = a1;
|
|
op += shortpitch;
|
|
}
|
|
}
|
|
|
|
void vp9_dc_only_idct_add_c(int input_dc, uint8_t *pred_ptr,
|
|
uint8_t *dst_ptr, int pitch, int stride) {
|
|
int a1;
|
|
int r, c;
|
|
int tmp;
|
|
int16_t out;
|
|
tmp = input_dc * cospi_16_64;
|
|
out = dct_const_round_shift(tmp);
|
|
tmp = out * cospi_16_64;
|
|
out = dct_const_round_shift(tmp);
|
|
a1 = (out + 8) >> 4;
|
|
|
|
for (r = 0; r < 4; r++) {
|
|
for (c = 0; c < 4; c++) {
|
|
dst_ptr[c] = clip_pixel(a1 + pred_ptr[c]);
|
|
}
|
|
dst_ptr += stride;
|
|
pred_ptr += pitch;
|
|
}
|
|
}
|
|
|
|
void idct8_1d(int16_t *input, int16_t *output) {
|
|
int16_t step1[8], step2[8];
|
|
int temp1, temp2;
|
|
// stage 1
|
|
step1[0] = input[0];
|
|
step1[2] = input[4];
|
|
step1[1] = input[2];
|
|
step1[3] = input[6];
|
|
temp1 = input[1] * cospi_28_64 - input[7] * cospi_4_64;
|
|
temp2 = input[1] * cospi_4_64 + input[7] * cospi_28_64;
|
|
step1[4] = dct_const_round_shift(temp1);
|
|
step1[7] = dct_const_round_shift(temp2);
|
|
temp1 = input[5] * cospi_12_64 - input[3] * cospi_20_64;
|
|
temp2 = input[5] * cospi_20_64 + input[3] * cospi_12_64;
|
|
step1[5] = dct_const_round_shift(temp1);
|
|
step1[6] = dct_const_round_shift(temp2);
|
|
|
|
// stage 2 & stage 3 - even half
|
|
idct4_1d(step1, step1);
|
|
|
|
// stage 2 - odd half
|
|
step2[4] = step1[4] + step1[5];
|
|
step2[5] = step1[4] - step1[5];
|
|
step2[6] = -step1[6] + step1[7];
|
|
step2[7] = step1[6] + step1[7];
|
|
|
|
// stage 3 -odd half
|
|
step1[4] = step2[4];
|
|
temp1 = (step2[6] - step2[5]) * cospi_16_64;
|
|
temp2 = (step2[5] + step2[6]) * cospi_16_64;
|
|
step1[5] = dct_const_round_shift(temp1);
|
|
step1[6] = dct_const_round_shift(temp2);
|
|
step1[7] = step2[7];
|
|
|
|
// stage 4
|
|
output[0] = step1[0] + step1[7];
|
|
output[1] = step1[1] + step1[6];
|
|
output[2] = step1[2] + step1[5];
|
|
output[3] = step1[3] + step1[4];
|
|
output[4] = step1[3] - step1[4];
|
|
output[5] = step1[2] - step1[5];
|
|
output[6] = step1[1] - step1[6];
|
|
output[7] = step1[0] - step1[7];
|
|
}
|
|
|
|
void vp9_short_idct8x8_c(int16_t *input, int16_t *output, int pitch) {
|
|
int16_t out[8 * 8];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[8], temp_out[8];
|
|
|
|
// First transform rows
|
|
for (i = 0; i < 8; ++i) {
|
|
idct8_1d(input, outptr);
|
|
input += 8;
|
|
outptr += 8;
|
|
}
|
|
|
|
// Then transform columns
|
|
for (i = 0; i < 8; ++i) {
|
|
for (j = 0; j < 8; ++j)
|
|
temp_in[j] = out[j * 8 + i];
|
|
idct8_1d(temp_in, temp_out);
|
|
for (j = 0; j < 8; ++j)
|
|
output[j * short_pitch + i] = (temp_out[j] + 16) >> 5;
|
|
}
|
|
}
|
|
|
|
#if CONFIG_INTHT4X4
|
|
static void iadst4_1d(int16_t *input, int16_t *output) {
|
|
int x0, x1, x2, x3;
|
|
int s0, s1, s2, s3, s4, s5, s6, s7;
|
|
|
|
x0 = input[0];
|
|
x1 = input[1];
|
|
x2 = input[2];
|
|
x3 = input[3];
|
|
|
|
if (!(x0 | x1 | x2 | x3)) {
|
|
output[0] = output[1] = output[2] = output[3] = 0;
|
|
return;
|
|
}
|
|
|
|
s0 = sinpi_1_9 * x0;
|
|
s1 = sinpi_2_9 * x0;
|
|
s2 = sinpi_3_9 * x1;
|
|
s3 = sinpi_4_9 * x2;
|
|
s4 = sinpi_1_9 * x2;
|
|
s5 = sinpi_2_9 * x3;
|
|
s6 = sinpi_4_9 * x3;
|
|
s7 = x0 - x2 + x3;
|
|
|
|
x0 = s0 + s3 + s5;
|
|
x1 = s1 - s4 - s6;
|
|
x2 = sinpi_3_9 * s7;
|
|
x3 = s2;
|
|
|
|
s0 = x0 + x3;
|
|
s1 = x1 + x3;
|
|
s2 = x2;
|
|
s3 = x0 + x1 - x3;
|
|
|
|
// 1-D transform scaling factor is sqrt(2).
|
|
// The overall dynamic range is 14b (input) + 14b (multiplication scaling)
|
|
// + 1b (addition) = 29b.
|
|
// Hence the output bit depth is 15b.
|
|
output[0] = dct_const_round_shift(s0);
|
|
output[1] = dct_const_round_shift(s1);
|
|
output[2] = dct_const_round_shift(s2);
|
|
output[3] = dct_const_round_shift(s3);
|
|
}
|
|
|
|
void vp9_short_iht4x4_c(int16_t *input, int16_t *output,
|
|
int pitch, TX_TYPE tx_type) {
|
|
int16_t out[16];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[4], temp_out[4];
|
|
|
|
void (*invr)(int16_t*, int16_t*);
|
|
void (*invc)(int16_t*, int16_t*);
|
|
|
|
switch (tx_type) {
|
|
case ADST_ADST:
|
|
invc = &iadst4_1d;
|
|
invr = &iadst4_1d;
|
|
break;
|
|
case ADST_DCT:
|
|
invc = &iadst4_1d;
|
|
invr = &idct4_1d;
|
|
break;
|
|
case DCT_ADST:
|
|
invc = &idct4_1d;
|
|
invr = &iadst4_1d;
|
|
break;
|
|
case DCT_DCT:
|
|
invc = &idct4_1d;
|
|
invr = &idct4_1d;
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
|
|
// inverse transform row vectors
|
|
for (i = 0; i < 4; ++i) {
|
|
invr(input, outptr);
|
|
input += 4;
|
|
outptr += 4;
|
|
}
|
|
|
|
// inverse transform column vectors
|
|
for (i = 0; i < 4; ++i) {
|
|
for (j = 0; j < 4; ++j)
|
|
temp_in[j] = out[j * 4 + i];
|
|
invc(temp_in, temp_out);
|
|
for (j = 0; j < 4; ++j)
|
|
output[j * short_pitch + i] = (temp_out[j] + 8) >> 4;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if CONFIG_INTHT
|
|
static void iadst8_1d(int16_t *input, int16_t *output) {
|
|
int x0, x1, x2, x3, x4, x5, x6, x7;
|
|
int s0, s1, s2, s3, s4, s5, s6, s7;
|
|
|
|
x0 = input[7];
|
|
x1 = input[0];
|
|
x2 = input[5];
|
|
x3 = input[2];
|
|
x4 = input[3];
|
|
x5 = input[4];
|
|
x6 = input[1];
|
|
x7 = input[6];
|
|
|
|
if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7)) {
|
|
output[0] = output[1] = output[2] = output[3] = output[4]
|
|
= output[5] = output[6] = output[7] = 0;
|
|
return;
|
|
}
|
|
|
|
// stage 1
|
|
s0 = cospi_2_64 * x0 + cospi_30_64 * x1;
|
|
s1 = cospi_30_64 * x0 - cospi_2_64 * x1;
|
|
s2 = cospi_10_64 * x2 + cospi_22_64 * x3;
|
|
s3 = cospi_22_64 * x2 - cospi_10_64 * x3;
|
|
s4 = cospi_18_64 * x4 + cospi_14_64 * x5;
|
|
s5 = cospi_14_64 * x4 - cospi_18_64 * x5;
|
|
s6 = cospi_26_64 * x6 + cospi_6_64 * x7;
|
|
s7 = cospi_6_64 * x6 - cospi_26_64 * x7;
|
|
|
|
x0 = dct_const_round_shift(s0 + s4);
|
|
x1 = dct_const_round_shift(s1 + s5);
|
|
x2 = dct_const_round_shift(s2 + s6);
|
|
x3 = dct_const_round_shift(s3 + s7);
|
|
x4 = dct_const_round_shift(s0 - s4);
|
|
x5 = dct_const_round_shift(s1 - s5);
|
|
x6 = dct_const_round_shift(s2 - s6);
|
|
x7 = dct_const_round_shift(s3 - s7);
|
|
|
|
// stage 2
|
|
s0 = x0;
|
|
s1 = x1;
|
|
s2 = x2;
|
|
s3 = x3;
|
|
s4 = cospi_8_64 * x4 + cospi_24_64 * x5;
|
|
s5 = cospi_24_64 * x4 - cospi_8_64 * x5;
|
|
s6 = - cospi_24_64 * x6 + cospi_8_64 * x7;
|
|
s7 = cospi_8_64 * x6 + cospi_24_64 * x7;
|
|
|
|
x0 = s0 + s2;
|
|
x1 = s1 + s3;
|
|
x2 = s0 - s2;
|
|
x3 = s1 - s3;
|
|
x4 = dct_const_round_shift(s4 + s6);
|
|
x5 = dct_const_round_shift(s5 + s7);
|
|
x6 = dct_const_round_shift(s4 - s6);
|
|
x7 = dct_const_round_shift(s5 - s7);
|
|
|
|
// stage 3
|
|
s2 = cospi_16_64 * (x2 + x3);
|
|
s3 = cospi_16_64 * (x2 - x3);
|
|
s6 = cospi_16_64 * (x6 + x7);
|
|
s7 = cospi_16_64 * (x6 - x7);
|
|
|
|
x2 = dct_const_round_shift(s2);
|
|
x3 = dct_const_round_shift(s3);
|
|
x6 = dct_const_round_shift(s6);
|
|
x7 = dct_const_round_shift(s7);
|
|
|
|
output[0] = x0;
|
|
output[1] = - x4;
|
|
output[2] = x6;
|
|
output[3] = - x2;
|
|
output[4] = x3;
|
|
output[5] = - x7;
|
|
output[6] = x5;
|
|
output[7] = - x1;
|
|
|
|
return;
|
|
}
|
|
|
|
void vp9_short_iht8x8_c(int16_t *input, int16_t *output,
|
|
int pitch, TX_TYPE tx_type) {
|
|
int16_t out[8 * 8];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[8], temp_out[8];
|
|
|
|
void (*invr)(int16_t*, int16_t*);
|
|
void (*invc)(int16_t*, int16_t*);
|
|
|
|
switch (tx_type) {
|
|
case ADST_ADST:
|
|
invc = &iadst8_1d;
|
|
invr = &iadst8_1d;
|
|
break;
|
|
case ADST_DCT:
|
|
invc = &iadst8_1d;
|
|
invr = &idct8_1d;
|
|
break;
|
|
case DCT_ADST:
|
|
invc = &idct8_1d;
|
|
invr = &iadst8_1d;
|
|
break;
|
|
case DCT_DCT:
|
|
invc = &idct8_1d;
|
|
invr = &idct8_1d;
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
|
|
// inverse transform row vectors
|
|
for (i = 0; i < 8; ++i) {
|
|
invr(input, outptr);
|
|
input += 8;
|
|
outptr += 8;
|
|
}
|
|
|
|
// inverse transform column vectors
|
|
for (i = 0; i < 8; ++i) {
|
|
for (j = 0; j < 8; ++j)
|
|
temp_in[j] = out[j * 8 + i];
|
|
invc(temp_in, temp_out);
|
|
for (j = 0; j < 8; ++j)
|
|
output[j * short_pitch + i] = (temp_out[j] + 16) >> 5;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
void vp9_short_idct10_8x8_c(int16_t *input, int16_t *output, int pitch) {
|
|
int16_t out[8 * 8];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[8], temp_out[8];
|
|
|
|
vpx_memset(out, 0, sizeof(out));
|
|
// First transform rows
|
|
// only first 4 row has non-zero coefs
|
|
for (i = 0; i < 4; ++i) {
|
|
idct8_1d(input, outptr);
|
|
input += 8;
|
|
outptr += 8;
|
|
}
|
|
|
|
// Then transform columns
|
|
for (i = 0; i < 8; ++i) {
|
|
for (j = 0; j < 8; ++j)
|
|
temp_in[j] = out[j * 8 + i];
|
|
idct8_1d(temp_in, temp_out);
|
|
for (j = 0; j < 8; ++j)
|
|
output[j * short_pitch + i] = (temp_out[j] + 16) >> 5;
|
|
}
|
|
}
|
|
|
|
void vp9_short_idct1_8x8_c(int16_t *input, int16_t *output) {
|
|
int16_t out = dct_const_round_shift(input[0] * cospi_16_64);
|
|
out = dct_const_round_shift(out * cospi_16_64);
|
|
output[0] = (out + 16) >> 5;
|
|
}
|
|
|
|
void idct16_1d(int16_t *input, int16_t *output) {
|
|
int16_t step1[16], step2[16];
|
|
int temp1, temp2;
|
|
|
|
// stage 1
|
|
step1[0] = input[0/2];
|
|
step1[1] = input[16/2];
|
|
step1[2] = input[8/2];
|
|
step1[3] = input[24/2];
|
|
step1[4] = input[4/2];
|
|
step1[5] = input[20/2];
|
|
step1[6] = input[12/2];
|
|
step1[7] = input[28/2];
|
|
step1[8] = input[2/2];
|
|
step1[9] = input[18/2];
|
|
step1[10] = input[10/2];
|
|
step1[11] = input[26/2];
|
|
step1[12] = input[6/2];
|
|
step1[13] = input[22/2];
|
|
step1[14] = input[14/2];
|
|
step1[15] = input[30/2];
|
|
|
|
// stage 2
|
|
step2[0] = step1[0];
|
|
step2[1] = step1[1];
|
|
step2[2] = step1[2];
|
|
step2[3] = step1[3];
|
|
step2[4] = step1[4];
|
|
step2[5] = step1[5];
|
|
step2[6] = step1[6];
|
|
step2[7] = step1[7];
|
|
|
|
temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
|
|
temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
|
|
step2[8] = dct_const_round_shift(temp1);
|
|
step2[15] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
|
|
temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
|
|
step2[9] = dct_const_round_shift(temp1);
|
|
step2[14] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
|
|
temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
|
|
step2[10] = dct_const_round_shift(temp1);
|
|
step2[13] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
|
|
temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
|
|
step2[11] = dct_const_round_shift(temp1);
|
|
step2[12] = dct_const_round_shift(temp2);
|
|
|
|
// stage 3
|
|
step1[0] = step2[0];
|
|
step1[1] = step2[1];
|
|
step1[2] = step2[2];
|
|
step1[3] = step2[3];
|
|
|
|
temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
|
|
temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
|
|
step1[4] = dct_const_round_shift(temp1);
|
|
step1[7] = dct_const_round_shift(temp2);
|
|
temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
|
|
temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
|
|
step1[5] = dct_const_round_shift(temp1);
|
|
step1[6] = dct_const_round_shift(temp2);
|
|
|
|
step1[8] = step2[8] + step2[9];
|
|
step1[9] = step2[8] - step2[9];
|
|
step1[10] = -step2[10] + step2[11];
|
|
step1[11] = step2[10] + step2[11];
|
|
step1[12] = step2[12] + step2[13];
|
|
step1[13] = step2[12] - step2[13];
|
|
step1[14] = -step2[14] + step2[15];
|
|
step1[15] = step2[14] + step2[15];
|
|
|
|
temp1 = (step1[0] + step1[1]) * cospi_16_64;
|
|
temp2 = (step1[0] - step1[1]) * cospi_16_64;
|
|
step2[0] = dct_const_round_shift(temp1);
|
|
step2[1] = dct_const_round_shift(temp2);
|
|
temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
|
|
temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
|
|
step2[2] = dct_const_round_shift(temp1);
|
|
step2[3] = dct_const_round_shift(temp2);
|
|
step2[4] = step1[4] + step1[5];
|
|
step2[5] = step1[4] - step1[5];
|
|
step2[6] = -step1[6] + step1[7];
|
|
step2[7] = step1[6] + step1[7];
|
|
|
|
step2[8] = step1[8];
|
|
step2[15] = step1[15];
|
|
temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
|
|
temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
|
|
step2[9] = dct_const_round_shift(temp1);
|
|
step2[14] = dct_const_round_shift(temp2);
|
|
temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
|
|
temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
|
|
step2[10] = dct_const_round_shift(temp1);
|
|
step2[13] = dct_const_round_shift(temp2);
|
|
step2[11] = step1[11];
|
|
step2[12] = step1[12];
|
|
|
|
// stage 5
|
|
step1[0] = step2[0] + step2[3];
|
|
step1[1] = step2[1] + step2[2];
|
|
step1[2] = step2[1] - step2[2];
|
|
step1[3] = step2[0] - step2[3];
|
|
step1[4] = step2[4];
|
|
temp1 = (step2[6] - step2[5]) * cospi_16_64;
|
|
temp2 = (step2[5] + step2[6]) * cospi_16_64;
|
|
step1[5] = dct_const_round_shift(temp1);
|
|
step1[6] = dct_const_round_shift(temp2);
|
|
step1[7] = step2[7];
|
|
|
|
step1[8] = step2[8] + step2[11];
|
|
step1[9] = step2[9] + step2[10];
|
|
step1[10] = step2[9] - step2[10];
|
|
step1[11] = step2[8] - step2[11];
|
|
step1[12] = -step2[12] + step2[15];
|
|
step1[13] = -step2[13] + step2[14];
|
|
step1[14] = step2[13] + step2[14];
|
|
step1[15] = step2[12] + step2[15];
|
|
|
|
// stage 6
|
|
step2[0] = step1[0] + step1[7];
|
|
step2[1] = step1[1] + step1[6];
|
|
step2[2] = step1[2] + step1[5];
|
|
step2[3] = step1[3] + step1[4];
|
|
step2[4] = step1[3] - step1[4];
|
|
step2[5] = step1[2] - step1[5];
|
|
step2[6] = step1[1] - step1[6];
|
|
step2[7] = step1[0] - step1[7];
|
|
step2[8] = step1[8];
|
|
step2[9] = step1[9];
|
|
temp1 = (-step1[10] + step1[13]) * cospi_16_64;
|
|
temp2 = (step1[10] + step1[13]) * cospi_16_64;
|
|
step2[10] = dct_const_round_shift(temp1);
|
|
step2[13] = dct_const_round_shift(temp2);
|
|
temp1 = (-step1[11] + step1[12]) * cospi_16_64;
|
|
temp2 = (step1[11] + step1[12]) * cospi_16_64;
|
|
step2[11] = dct_const_round_shift(temp1);
|
|
step2[12] = dct_const_round_shift(temp2);
|
|
step2[14] = step1[14];
|
|
step2[15] = step1[15];
|
|
|
|
// stage 7
|
|
output[0] = step2[0] + step2[15];
|
|
output[1] = step2[1] + step2[14];
|
|
output[2] = step2[2] + step2[13];
|
|
output[3] = step2[3] + step2[12];
|
|
output[4] = step2[4] + step2[11];
|
|
output[5] = step2[5] + step2[10];
|
|
output[6] = step2[6] + step2[9];
|
|
output[7] = step2[7] + step2[8];
|
|
output[8] = step2[7] - step2[8];
|
|
output[9] = step2[6] - step2[9];
|
|
output[10] = step2[5] - step2[10];
|
|
output[11] = step2[4] - step2[11];
|
|
output[12] = step2[3] - step2[12];
|
|
output[13] = step2[2] - step2[13];
|
|
output[14] = step2[1] - step2[14];
|
|
output[15] = step2[0] - step2[15];
|
|
}
|
|
|
|
void vp9_short_idct16x16_c(int16_t *input, int16_t *output, int pitch) {
|
|
int16_t out[16 * 16];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[16], temp_out[16];
|
|
|
|
// First transform rows
|
|
for (i = 0; i < 16; ++i) {
|
|
idct16_1d(input, outptr);
|
|
input += short_pitch;
|
|
outptr += 16;
|
|
}
|
|
|
|
// Then transform columns
|
|
for (i = 0; i < 16; ++i) {
|
|
for (j = 0; j < 16; ++j)
|
|
temp_in[j] = out[j * 16 + i];
|
|
idct16_1d(temp_in, temp_out);
|
|
for (j = 0; j < 16; ++j)
|
|
output[j * 16 + i] = (temp_out[j] + 32) >> 6;
|
|
}
|
|
}
|
|
|
|
#if CONFIG_INTHT16X16
|
|
void iadst16_1d(int16_t *input, int16_t *output) {
|
|
int x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15;
|
|
int s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14, s15;
|
|
|
|
x0 = input[15];
|
|
x1 = input[0];
|
|
x2 = input[13];
|
|
x3 = input[2];
|
|
x4 = input[11];
|
|
x5 = input[4];
|
|
x6 = input[9];
|
|
x7 = input[6];
|
|
x8 = input[7];
|
|
x9 = input[8];
|
|
x10 = input[5];
|
|
x11 = input[10];
|
|
x12 = input[3];
|
|
x13 = input[12];
|
|
x14 = input[1];
|
|
x15 = input[14];
|
|
|
|
if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8
|
|
| x9 | x10 | x11 | x12 | x13 | x14 | x15)) {
|
|
output[0] = output[1] = output[2] = output[3] = output[4]
|
|
= output[5] = output[6] = output[7] = output[8]
|
|
= output[9] = output[10] = output[11] = output[12]
|
|
= output[13] = output[14] = output[15] = 0;
|
|
return;
|
|
}
|
|
|
|
// stage 1
|
|
s0 = x0 * cospi_1_64 + x1 * cospi_31_64;
|
|
s1 = x0 * cospi_31_64 - x1 * cospi_1_64;
|
|
s2 = x2 * cospi_5_64 + x3 * cospi_27_64;
|
|
s3 = x2 * cospi_27_64 - x3 * cospi_5_64;
|
|
s4 = x4 * cospi_9_64 + x5 * cospi_23_64;
|
|
s5 = x4 * cospi_23_64 - x5 * cospi_9_64;
|
|
s6 = x6 * cospi_13_64 + x7 * cospi_19_64;
|
|
s7 = x6 * cospi_19_64 - x7 * cospi_13_64;
|
|
s8 = x8 * cospi_17_64 + x9 * cospi_15_64;
|
|
s9 = x8 * cospi_15_64 - x9 * cospi_17_64;
|
|
s10 = x10 * cospi_21_64 + x11 * cospi_11_64;
|
|
s11 = x10 * cospi_11_64 - x11 * cospi_21_64;
|
|
s12 = x12 * cospi_25_64 + x13 * cospi_7_64;
|
|
s13 = x12 * cospi_7_64 - x13 * cospi_25_64;
|
|
s14 = x14 * cospi_29_64 + x15 * cospi_3_64;
|
|
s15 = x14 * cospi_3_64 - x15 * cospi_29_64;
|
|
|
|
x0 = dct_const_round_shift(s0 + s8);
|
|
x1 = dct_const_round_shift(s1 + s9);
|
|
x2 = dct_const_round_shift(s2 + s10);
|
|
x3 = dct_const_round_shift(s3 + s11);
|
|
x4 = dct_const_round_shift(s4 + s12);
|
|
x5 = dct_const_round_shift(s5 + s13);
|
|
x6 = dct_const_round_shift(s6 + s14);
|
|
x7 = dct_const_round_shift(s7 + s15);
|
|
x8 = dct_const_round_shift(s0 - s8);
|
|
x9 = dct_const_round_shift(s1 - s9);
|
|
x10 = dct_const_round_shift(s2 - s10);
|
|
x11 = dct_const_round_shift(s3 - s11);
|
|
x12 = dct_const_round_shift(s4 - s12);
|
|
x13 = dct_const_round_shift(s5 - s13);
|
|
x14 = dct_const_round_shift(s6 - s14);
|
|
x15 = dct_const_round_shift(s7 - s15);
|
|
|
|
// stage 2
|
|
s0 = x0;
|
|
s1 = x1;
|
|
s2 = x2;
|
|
s3 = x3;
|
|
s4 = x4;
|
|
s5 = x5;
|
|
s6 = x6;
|
|
s7 = x7;
|
|
s8 = x8 * cospi_4_64 + x9 * cospi_28_64;
|
|
s9 = x8 * cospi_28_64 - x9 * cospi_4_64;
|
|
s10 = x10 * cospi_20_64 + x11 * cospi_12_64;
|
|
s11 = x10 * cospi_12_64 - x11 * cospi_20_64;
|
|
s12 = - x12 * cospi_28_64 + x13 * cospi_4_64;
|
|
s13 = x12 * cospi_4_64 + x13 * cospi_28_64;
|
|
s14 = - x14 * cospi_12_64 + x15 * cospi_20_64;
|
|
s15 = x14 * cospi_20_64 + x15 * cospi_12_64;
|
|
|
|
x0 = s0 + s4;
|
|
x1 = s1 + s5;
|
|
x2 = s2 + s6;
|
|
x3 = s3 + s7;
|
|
x4 = s0 - s4;
|
|
x5 = s1 - s5;
|
|
x6 = s2 - s6;
|
|
x7 = s3 - s7;
|
|
x8 = dct_const_round_shift(s8 + s12);
|
|
x9 = dct_const_round_shift(s9 + s13);
|
|
x10 = dct_const_round_shift(s10 + s14);
|
|
x11 = dct_const_round_shift(s11 + s15);
|
|
x12 = dct_const_round_shift(s8 - s12);
|
|
x13 = dct_const_round_shift(s9 - s13);
|
|
x14 = dct_const_round_shift(s10 - s14);
|
|
x15 = dct_const_round_shift(s11 - s15);
|
|
|
|
// stage 3
|
|
s0 = x0;
|
|
s1 = x1;
|
|
s2 = x2;
|
|
s3 = x3;
|
|
s4 = x4 * cospi_8_64 + x5 * cospi_24_64;
|
|
s5 = x4 * cospi_24_64 - x5 * cospi_8_64;
|
|
s6 = - x6 * cospi_24_64 + x7 * cospi_8_64;
|
|
s7 = x6 * cospi_8_64 + x7 * cospi_24_64;
|
|
s8 = x8;
|
|
s9 = x9;
|
|
s10 = x10;
|
|
s11 = x11;
|
|
s12 = x12 * cospi_8_64 + x13 * cospi_24_64;
|
|
s13 = x12 * cospi_24_64 - x13 * cospi_8_64;
|
|
s14 = - x14 * cospi_24_64 + x15 * cospi_8_64;
|
|
s15 = x14 * cospi_8_64 + x15 * cospi_24_64;
|
|
|
|
x0 = s0 + s2;
|
|
x1 = s1 + s3;
|
|
x2 = s0 - s2;
|
|
x3 = s1 - s3;
|
|
x4 = dct_const_round_shift(s4 + s6);
|
|
x5 = dct_const_round_shift(s5 + s7);
|
|
x6 = dct_const_round_shift(s4 - s6);
|
|
x7 = dct_const_round_shift(s5 - s7);
|
|
x8 = s8 + s10;
|
|
x9 = s9 + s11;
|
|
x10 = s8 - s10;
|
|
x11 = s9 - s11;
|
|
x12 = dct_const_round_shift(s12 + s14);
|
|
x13 = dct_const_round_shift(s13 + s15);
|
|
x14 = dct_const_round_shift(s12 - s14);
|
|
x15 = dct_const_round_shift(s13 - s15);
|
|
|
|
// stage 4
|
|
s2 = (- cospi_16_64) * (x2 + x3);
|
|
s3 = cospi_16_64 * (x2 - x3);
|
|
s6 = cospi_16_64 * (x6 + x7);
|
|
s7 = cospi_16_64 * (- x6 + x7);
|
|
s10 = cospi_16_64 * (x10 + x11);
|
|
s11 = cospi_16_64 * (- x10 + x11);
|
|
s14 = (- cospi_16_64) * (x14 + x15);
|
|
s15 = cospi_16_64 * (x14 - x15);
|
|
|
|
x2 = dct_const_round_shift(s2);
|
|
x3 = dct_const_round_shift(s3);
|
|
x6 = dct_const_round_shift(s6);
|
|
x7 = dct_const_round_shift(s7);
|
|
x10 = dct_const_round_shift(s10);
|
|
x11 = dct_const_round_shift(s11);
|
|
x14 = dct_const_round_shift(s14);
|
|
x15 = dct_const_round_shift(s15);
|
|
|
|
output[0] = x0;
|
|
output[1] = - x8;
|
|
output[2] = x12;
|
|
output[3] = - x4;
|
|
output[4] = x6;
|
|
output[5] = x14;
|
|
output[6] = x10;
|
|
output[7] = x2;
|
|
output[8] = x3;
|
|
output[9] = x11;
|
|
output[10] = x15;
|
|
output[11] = x7;
|
|
output[12] = x5;
|
|
output[13] = - x13;
|
|
output[14] = x9;
|
|
output[15] = - x1;
|
|
}
|
|
|
|
void vp9_short_iht16x16_c(int16_t *input, int16_t *output,
|
|
int pitch, TX_TYPE tx_type) {
|
|
int16_t out[16 * 16];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[16], temp_out[16];
|
|
|
|
void (*invr)(int16_t*, int16_t*);
|
|
void (*invc)(int16_t*, int16_t*);
|
|
|
|
switch (tx_type) {
|
|
case ADST_ADST:
|
|
invc = &iadst16_1d;
|
|
invr = &iadst16_1d;
|
|
break;
|
|
case ADST_DCT:
|
|
invc = &iadst16_1d;
|
|
invr = &idct16_1d;
|
|
break;
|
|
case DCT_ADST:
|
|
invc = &idct16_1d;
|
|
invr = &iadst16_1d;
|
|
break;
|
|
case DCT_DCT:
|
|
invc = &idct16_1d;
|
|
invr = &idct16_1d;
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
|
|
// inverse transform row vectors
|
|
for (i = 0; i < 16; ++i) {
|
|
invr(input, outptr);
|
|
input += short_pitch;
|
|
outptr += 16;
|
|
}
|
|
|
|
// inverse transform column vectors
|
|
for (i = 0; i < 16; ++i) {
|
|
for (j = 0; j < 16; ++j)
|
|
temp_in[j] = out[j * 16 + i];
|
|
invc(temp_in, temp_out);
|
|
for (j = 0; j < 16; ++j)
|
|
output[j * 16 + i] = (temp_out[j] + 32) >> 6;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
void vp9_short_idct10_16x16_c(int16_t *input, int16_t *output, int pitch) {
|
|
int16_t out[16 * 16];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[16], temp_out[16];
|
|
|
|
/* First transform rows. Since all non-zero dct coefficients are in
|
|
* upper-left 4x4 area, we only need to calculate first 4 rows here.
|
|
*/
|
|
vpx_memset(out, 0, sizeof(out));
|
|
for (i = 0; i < 4; ++i) {
|
|
idct16_1d(input, outptr);
|
|
input += short_pitch;
|
|
outptr += 16;
|
|
}
|
|
|
|
// Then transform columns
|
|
for (i = 0; i < 16; ++i) {
|
|
for (j = 0; j < 16; ++j)
|
|
temp_in[j] = out[j*16 + i];
|
|
idct16_1d(temp_in, temp_out);
|
|
for (j = 0; j < 16; ++j)
|
|
output[j*16 + i] = (temp_out[j] + 32) >> 6;
|
|
}
|
|
}
|
|
|
|
|
|
void vp9_short_idct1_16x16_c(int16_t *input, int16_t *output) {
|
|
int tmp;
|
|
int16_t out;
|
|
tmp = input[0] * cospi_16_64;
|
|
out = dct_const_round_shift(tmp);
|
|
tmp = out * cospi_16_64;
|
|
out = dct_const_round_shift(tmp);
|
|
*output = (out + 32) >> 6;
|
|
}
|
|
|
|
void idct32_1d(int16_t *input, int16_t *output) {
|
|
int16_t step1[32], step2[32];
|
|
int temp1, temp2;
|
|
|
|
// stage 1
|
|
step1[0] = input[0];
|
|
step1[1] = input[16];
|
|
step1[2] = input[8];
|
|
step1[3] = input[24];
|
|
step1[4] = input[4];
|
|
step1[5] = input[20];
|
|
step1[6] = input[12];
|
|
step1[7] = input[28];
|
|
step1[8] = input[2];
|
|
step1[9] = input[18];
|
|
step1[10] = input[10];
|
|
step1[11] = input[26];
|
|
step1[12] = input[6];
|
|
step1[13] = input[22];
|
|
step1[14] = input[14];
|
|
step1[15] = input[30];
|
|
|
|
temp1 = input[1] * cospi_31_64 - input[31] * cospi_1_64;
|
|
temp2 = input[1] * cospi_1_64 + input[31] * cospi_31_64;
|
|
step1[16] = dct_const_round_shift(temp1);
|
|
step1[31] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = input[17] * cospi_15_64 - input[15] * cospi_17_64;
|
|
temp2 = input[17] * cospi_17_64 + input[15] * cospi_15_64;
|
|
step1[17] = dct_const_round_shift(temp1);
|
|
step1[30] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = input[9] * cospi_23_64 - input[23] * cospi_9_64;
|
|
temp2 = input[9] * cospi_9_64 + input[23] * cospi_23_64;
|
|
step1[18] = dct_const_round_shift(temp1);
|
|
step1[29] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = input[25] * cospi_7_64 - input[7] * cospi_25_64;
|
|
temp2 = input[25] * cospi_25_64 + input[7] * cospi_7_64;
|
|
step1[19] = dct_const_round_shift(temp1);
|
|
step1[28] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = input[5] * cospi_27_64 - input[27] * cospi_5_64;
|
|
temp2 = input[5] * cospi_5_64 + input[27] * cospi_27_64;
|
|
step1[20] = dct_const_round_shift(temp1);
|
|
step1[27] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = input[21] * cospi_11_64 - input[11] * cospi_21_64;
|
|
temp2 = input[21] * cospi_21_64 + input[11] * cospi_11_64;
|
|
step1[21] = dct_const_round_shift(temp1);
|
|
step1[26] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = input[13] * cospi_19_64 - input[19] * cospi_13_64;
|
|
temp2 = input[13] * cospi_13_64 + input[19] * cospi_19_64;
|
|
step1[22] = dct_const_round_shift(temp1);
|
|
step1[25] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = input[29] * cospi_3_64 - input[3] * cospi_29_64;
|
|
temp2 = input[29] * cospi_29_64 + input[3] * cospi_3_64;
|
|
step1[23] = dct_const_round_shift(temp1);
|
|
step1[24] = dct_const_round_shift(temp2);
|
|
|
|
// stage 2
|
|
step2[0] = step1[0];
|
|
step2[1] = step1[1];
|
|
step2[2] = step1[2];
|
|
step2[3] = step1[3];
|
|
step2[4] = step1[4];
|
|
step2[5] = step1[5];
|
|
step2[6] = step1[6];
|
|
step2[7] = step1[7];
|
|
|
|
temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
|
|
temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
|
|
step2[8] = dct_const_round_shift(temp1);
|
|
step2[15] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
|
|
temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
|
|
step2[9] = dct_const_round_shift(temp1);
|
|
step2[14] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
|
|
temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
|
|
step2[10] = dct_const_round_shift(temp1);
|
|
step2[13] = dct_const_round_shift(temp2);
|
|
|
|
temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
|
|
temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
|
|
step2[11] = dct_const_round_shift(temp1);
|
|
step2[12] = dct_const_round_shift(temp2);
|
|
|
|
step2[16] = step1[16] + step1[17];
|
|
step2[17] = step1[16] - step1[17];
|
|
step2[18] = -step1[18] + step1[19];
|
|
step2[19] = step1[18] + step1[19];
|
|
step2[20] = step1[20] + step1[21];
|
|
step2[21] = step1[20] - step1[21];
|
|
step2[22] = -step1[22] + step1[23];
|
|
step2[23] = step1[22] + step1[23];
|
|
step2[24] = step1[24] + step1[25];
|
|
step2[25] = step1[24] - step1[25];
|
|
step2[26] = -step1[26] + step1[27];
|
|
step2[27] = step1[26] + step1[27];
|
|
step2[28] = step1[28] + step1[29];
|
|
step2[29] = step1[28] - step1[29];
|
|
step2[30] = -step1[30] + step1[31];
|
|
step2[31] = step1[30] + step1[31];
|
|
|
|
// stage 3
|
|
step1[0] = step2[0];
|
|
step1[1] = step2[1];
|
|
step1[2] = step2[2];
|
|
step1[3] = step2[3];
|
|
|
|
temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
|
|
temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
|
|
step1[4] = dct_const_round_shift(temp1);
|
|
step1[7] = dct_const_round_shift(temp2);
|
|
temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
|
|
temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
|
|
step1[5] = dct_const_round_shift(temp1);
|
|
step1[6] = dct_const_round_shift(temp2);
|
|
|
|
step1[8] = step2[8] + step2[9];
|
|
step1[9] = step2[8] - step2[9];
|
|
step1[10] = -step2[10] + step2[11];
|
|
step1[11] = step2[10] + step2[11];
|
|
step1[12] = step2[12] + step2[13];
|
|
step1[13] = step2[12] - step2[13];
|
|
step1[14] = -step2[14] + step2[15];
|
|
step1[15] = step2[14] + step2[15];
|
|
|
|
step1[16] = step2[16];
|
|
step1[31] = step2[31];
|
|
temp1 = -step2[17] * cospi_4_64 + step2[30] * cospi_28_64;
|
|
temp2 = step2[17] * cospi_28_64 + step2[30] * cospi_4_64;
|
|
step1[17] = dct_const_round_shift(temp1);
|
|
step1[30] = dct_const_round_shift(temp2);
|
|
temp1 = -step2[18] * cospi_28_64 - step2[29] * cospi_4_64;
|
|
temp2 = -step2[18] * cospi_4_64 + step2[29] * cospi_28_64;
|
|
step1[18] = dct_const_round_shift(temp1);
|
|
step1[29] = dct_const_round_shift(temp2);
|
|
step1[19] = step2[19];
|
|
step1[20] = step2[20];
|
|
temp1 = -step2[21] * cospi_20_64 + step2[26] * cospi_12_64;
|
|
temp2 = step2[21] * cospi_12_64 + step2[26] * cospi_20_64;
|
|
step1[21] = dct_const_round_shift(temp1);
|
|
step1[26] = dct_const_round_shift(temp2);
|
|
temp1 = -step2[22] * cospi_12_64 - step2[25] * cospi_20_64;
|
|
temp2 = -step2[22] * cospi_20_64 + step2[25] * cospi_12_64;
|
|
step1[22] = dct_const_round_shift(temp1);
|
|
step1[25] = dct_const_round_shift(temp2);
|
|
step1[23] = step2[23];
|
|
step1[24] = step2[24];
|
|
step1[27] = step2[27];
|
|
step1[28] = step2[28];
|
|
|
|
// stage 4
|
|
temp1 = (step1[0] + step1[1]) * cospi_16_64;
|
|
temp2 = (step1[0] - step1[1]) * cospi_16_64;
|
|
step2[0] = dct_const_round_shift(temp1);
|
|
step2[1] = dct_const_round_shift(temp2);
|
|
temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
|
|
temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
|
|
step2[2] = dct_const_round_shift(temp1);
|
|
step2[3] = dct_const_round_shift(temp2);
|
|
step2[4] = step1[4] + step1[5];
|
|
step2[5] = step1[4] - step1[5];
|
|
step2[6] = -step1[6] + step1[7];
|
|
step2[7] = step1[6] + step1[7];
|
|
|
|
step2[8] = step1[8];
|
|
step2[15] = step1[15];
|
|
temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
|
|
temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
|
|
step2[9] = dct_const_round_shift(temp1);
|
|
step2[14] = dct_const_round_shift(temp2);
|
|
temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
|
|
temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
|
|
step2[10] = dct_const_round_shift(temp1);
|
|
step2[13] = dct_const_round_shift(temp2);
|
|
step2[11] = step1[11];
|
|
step2[12] = step1[12];
|
|
|
|
step2[16] = step1[16] + step1[19];
|
|
step2[17] = step1[17] + step1[18];
|
|
step2[18] = step1[17] - step1[18];
|
|
step2[19] = step1[16] - step1[19];
|
|
step2[20] = -step1[20] + step1[23];
|
|
step2[21] = -step1[21] + step1[22];
|
|
step2[22] = step1[21] + step1[22];
|
|
step2[23] = step1[20] + step1[23];
|
|
|
|
step2[24] = step1[24] + step1[27];
|
|
step2[25] = step1[25] + step1[26];
|
|
step2[26] = step1[25] - step1[26];
|
|
step2[27] = step1[24] - step1[27];
|
|
step2[28] = -step1[28] + step1[31];
|
|
step2[29] = -step1[29] + step1[30];
|
|
step2[30] = step1[29] + step1[30];
|
|
step2[31] = step1[28] + step1[31];
|
|
|
|
// stage 5
|
|
step1[0] = step2[0] + step2[3];
|
|
step1[1] = step2[1] + step2[2];
|
|
step1[2] = step2[1] - step2[2];
|
|
step1[3] = step2[0] - step2[3];
|
|
step1[4] = step2[4];
|
|
temp1 = (step2[6] - step2[5]) * cospi_16_64;
|
|
temp2 = (step2[5] + step2[6]) * cospi_16_64;
|
|
step1[5] = dct_const_round_shift(temp1);
|
|
step1[6] = dct_const_round_shift(temp2);
|
|
step1[7] = step2[7];
|
|
|
|
step1[8] = step2[8] + step2[11];
|
|
step1[9] = step2[9] + step2[10];
|
|
step1[10] = step2[9] - step2[10];
|
|
step1[11] = step2[8] - step2[11];
|
|
step1[12] = -step2[12] + step2[15];
|
|
step1[13] = -step2[13] + step2[14];
|
|
step1[14] = step2[13] + step2[14];
|
|
step1[15] = step2[12] + step2[15];
|
|
|
|
step1[16] = step2[16];
|
|
step1[17] = step2[17];
|
|
temp1 = -step2[18] * cospi_8_64 + step2[29] * cospi_24_64;
|
|
temp2 = step2[18] * cospi_24_64 + step2[29] * cospi_8_64;
|
|
step1[18] = dct_const_round_shift(temp1);
|
|
step1[29] = dct_const_round_shift(temp2);
|
|
temp1 = -step2[19] * cospi_8_64 + step2[28] * cospi_24_64;
|
|
temp2 = step2[19] * cospi_24_64 + step2[28] * cospi_8_64;
|
|
step1[19] = dct_const_round_shift(temp1);
|
|
step1[28] = dct_const_round_shift(temp2);
|
|
temp1 = -step2[20] * cospi_24_64 - step2[27] * cospi_8_64;
|
|
temp2 = -step2[20] * cospi_8_64 + step2[27] * cospi_24_64;
|
|
step1[20] = dct_const_round_shift(temp1);
|
|
step1[27] = dct_const_round_shift(temp2);
|
|
temp1 = -step2[21] * cospi_24_64 - step2[26] * cospi_8_64;
|
|
temp2 = -step2[21] * cospi_8_64 + step2[26] * cospi_24_64;
|
|
step1[21] = dct_const_round_shift(temp1);
|
|
step1[26] = dct_const_round_shift(temp2);
|
|
step1[22] = step2[22];
|
|
step1[23] = step2[23];
|
|
step1[24] = step2[24];
|
|
step1[25] = step2[25];
|
|
step1[30] = step2[30];
|
|
step1[31] = step2[31];
|
|
|
|
// stage 6
|
|
step2[0] = step1[0] + step1[7];
|
|
step2[1] = step1[1] + step1[6];
|
|
step2[2] = step1[2] + step1[5];
|
|
step2[3] = step1[3] + step1[4];
|
|
step2[4] = step1[3] - step1[4];
|
|
step2[5] = step1[2] - step1[5];
|
|
step2[6] = step1[1] - step1[6];
|
|
step2[7] = step1[0] - step1[7];
|
|
step2[8] = step1[8];
|
|
step2[9] = step1[9];
|
|
temp1 = (-step1[10] + step1[13]) * cospi_16_64;
|
|
temp2 = (step1[10] + step1[13]) * cospi_16_64;
|
|
step2[10] = dct_const_round_shift(temp1);
|
|
step2[13] = dct_const_round_shift(temp2);
|
|
temp1 = (-step1[11] + step1[12]) * cospi_16_64;
|
|
temp2 = (step1[11] + step1[12]) * cospi_16_64;
|
|
step2[11] = dct_const_round_shift(temp1);
|
|
step2[12] = dct_const_round_shift(temp2);
|
|
step2[14] = step1[14];
|
|
step2[15] = step1[15];
|
|
|
|
step2[16] = step1[16] + step1[23];
|
|
step2[17] = step1[17] + step1[22];
|
|
step2[18] = step1[18] + step1[21];
|
|
step2[19] = step1[19] + step1[20];
|
|
step2[20] = step1[19] - step1[20];
|
|
step2[21] = step1[18] - step1[21];
|
|
step2[22] = step1[17] - step1[22];
|
|
step2[23] = step1[16] - step1[23];
|
|
|
|
step2[24] = -step1[24] + step1[31];
|
|
step2[25] = -step1[25] + step1[30];
|
|
step2[26] = -step1[26] + step1[29];
|
|
step2[27] = -step1[27] + step1[28];
|
|
step2[28] = step1[27] + step1[28];
|
|
step2[29] = step1[26] + step1[29];
|
|
step2[30] = step1[25] + step1[30];
|
|
step2[31] = step1[24] + step1[31];
|
|
|
|
// stage 7
|
|
step1[0] = step2[0] + step2[15];
|
|
step1[1] = step2[1] + step2[14];
|
|
step1[2] = step2[2] + step2[13];
|
|
step1[3] = step2[3] + step2[12];
|
|
step1[4] = step2[4] + step2[11];
|
|
step1[5] = step2[5] + step2[10];
|
|
step1[6] = step2[6] + step2[9];
|
|
step1[7] = step2[7] + step2[8];
|
|
step1[8] = step2[7] - step2[8];
|
|
step1[9] = step2[6] - step2[9];
|
|
step1[10] = step2[5] - step2[10];
|
|
step1[11] = step2[4] - step2[11];
|
|
step1[12] = step2[3] - step2[12];
|
|
step1[13] = step2[2] - step2[13];
|
|
step1[14] = step2[1] - step2[14];
|
|
step1[15] = step2[0] - step2[15];
|
|
|
|
step1[16] = step2[16];
|
|
step1[17] = step2[17];
|
|
step1[18] = step2[18];
|
|
step1[19] = step2[19];
|
|
temp1 = (-step2[20] + step2[27]) * cospi_16_64;
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temp2 = (step2[20] + step2[27]) * cospi_16_64;
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step1[20] = dct_const_round_shift(temp1);
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step1[27] = dct_const_round_shift(temp2);
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temp1 = (-step2[21] + step2[26]) * cospi_16_64;
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temp2 = (step2[21] + step2[26]) * cospi_16_64;
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step1[21] = dct_const_round_shift(temp1);
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step1[26] = dct_const_round_shift(temp2);
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temp1 = (-step2[22] + step2[25]) * cospi_16_64;
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temp2 = (step2[22] + step2[25]) * cospi_16_64;
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step1[22] = dct_const_round_shift(temp1);
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step1[25] = dct_const_round_shift(temp2);
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temp1 = (-step2[23] + step2[24]) * cospi_16_64;
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temp2 = (step2[23] + step2[24]) * cospi_16_64;
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step1[23] = dct_const_round_shift(temp1);
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step1[24] = dct_const_round_shift(temp2);
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step1[28] = step2[28];
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step1[29] = step2[29];
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step1[30] = step2[30];
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step1[31] = step2[31];
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|
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// final stage
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output[0] = step1[0] + step1[31];
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output[1] = step1[1] + step1[30];
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output[2] = step1[2] + step1[29];
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output[3] = step1[3] + step1[28];
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output[4] = step1[4] + step1[27];
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output[5] = step1[5] + step1[26];
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output[6] = step1[6] + step1[25];
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output[7] = step1[7] + step1[24];
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|
output[8] = step1[8] + step1[23];
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output[9] = step1[9] + step1[22];
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|
output[10] = step1[10] + step1[21];
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|
output[11] = step1[11] + step1[20];
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|
output[12] = step1[12] + step1[19];
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|
output[13] = step1[13] + step1[18];
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|
output[14] = step1[14] + step1[17];
|
|
output[15] = step1[15] + step1[16];
|
|
output[16] = step1[15] - step1[16];
|
|
output[17] = step1[14] - step1[17];
|
|
output[18] = step1[13] - step1[18];
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|
output[19] = step1[12] - step1[19];
|
|
output[20] = step1[11] - step1[20];
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|
output[21] = step1[10] - step1[21];
|
|
output[22] = step1[9] - step1[22];
|
|
output[23] = step1[8] - step1[23];
|
|
output[24] = step1[7] - step1[24];
|
|
output[25] = step1[6] - step1[25];
|
|
output[26] = step1[5] - step1[26];
|
|
output[27] = step1[4] - step1[27];
|
|
output[28] = step1[3] - step1[28];
|
|
output[29] = step1[2] - step1[29];
|
|
output[30] = step1[1] - step1[30];
|
|
output[31] = step1[0] - step1[31];
|
|
}
|
|
|
|
void vp9_short_idct32x32_c(int16_t *input, int16_t *output, int pitch) {
|
|
int16_t out[32 * 32];
|
|
int16_t *outptr = &out[0];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
int16_t temp_in[32], temp_out[32];
|
|
|
|
// First transform rows
|
|
for (i = 0; i < 32; ++i) {
|
|
idct32_1d(input, outptr);
|
|
input += short_pitch;
|
|
outptr += 32;
|
|
}
|
|
// Then transform columns
|
|
for (i = 0; i < 32; ++i) {
|
|
for (j = 0; j < 32; ++j)
|
|
temp_in[j] = out[j * 32 + i];
|
|
idct32_1d(temp_in, temp_out);
|
|
for (j = 0; j < 32; ++j)
|
|
output[j * 32 + i] = (temp_out[j] + 32) >> 6;
|
|
}
|
|
}
|
|
|
|
void vp9_short_idct1_32x32_c(int16_t *input, int16_t *output) {
|
|
int16_t out = dct_const_round_shift(input[0] * cospi_16_64);
|
|
out = dct_const_round_shift(out * cospi_16_64);
|
|
output[0] = (out + 32) >> 6;
|
|
}
|