1274 lines
40 KiB
C
1274 lines
40 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_ports/config.h"
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#include "vp8/common/idct.h"
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#include "vp8/common/systemdependent.h"
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#include "vp8/common/blockd.h"
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static const int cospi8sqrt2minus1 = 20091;
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static const int sinpi8sqrt2 = 35468;
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static const int rounding = 0;
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// TODO: these transforms can be further converted into integer forms
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// for complexity optimization
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float idct_4[16] = {
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0.500000000000000, 0.653281482438188, 0.500000000000000, 0.270598050073099,
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0.500000000000000, 0.270598050073099, -0.500000000000000, -0.653281482438188,
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0.500000000000000, -0.270598050073099, -0.500000000000000, 0.653281482438188,
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0.500000000000000, -0.653281482438188, 0.500000000000000, -0.270598050073099
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};
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float iadst_4[16] = {
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0.228013428883779, 0.577350269189626, 0.656538502008139, 0.428525073124360,
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0.428525073124360, 0.577350269189626, -0.228013428883779, -0.656538502008139,
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0.577350269189626, 0, -0.577350269189626, 0.577350269189626,
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0.656538502008139, -0.577350269189626, 0.428525073124359, -0.228013428883779
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};
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float idct_8[64] = {
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0.353553390593274, 0.490392640201615, 0.461939766255643, 0.415734806151273,
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0.353553390593274, 0.277785116509801, 0.191341716182545, 0.097545161008064,
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0.353553390593274, 0.415734806151273, 0.191341716182545, -0.097545161008064,
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-0.353553390593274, -0.490392640201615, -0.461939766255643, -0.277785116509801,
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0.353553390593274, 0.277785116509801, -0.191341716182545, -0.490392640201615,
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-0.353553390593274, 0.097545161008064, 0.461939766255643, 0.415734806151273,
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0.353553390593274, 0.097545161008064, -0.461939766255643, -0.277785116509801,
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0.353553390593274, 0.415734806151273, -0.191341716182545, -0.490392640201615,
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0.353553390593274, -0.097545161008064, -0.461939766255643, 0.277785116509801,
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0.353553390593274, -0.415734806151273, -0.191341716182545, 0.490392640201615,
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0.353553390593274, -0.277785116509801, -0.191341716182545, 0.490392640201615,
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-0.353553390593274, -0.097545161008064, 0.461939766255643, -0.415734806151273,
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0.353553390593274, -0.415734806151273, 0.191341716182545, 0.097545161008064,
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-0.353553390593274, 0.490392640201615, -0.461939766255643, 0.277785116509801,
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0.353553390593274, -0.490392640201615, 0.461939766255643, -0.415734806151273,
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0.353553390593274, -0.277785116509801, 0.191341716182545, -0.097545161008064
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};
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float iadst_8[64] = {
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0.089131608307533, 0.255357107325376, 0.387095214016349, 0.466553967085785,
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0.483002021635509, 0.434217976756762, 0.326790388032145, 0.175227946595735,
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0.175227946595735, 0.434217976756762, 0.466553967085785, 0.255357107325376,
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-0.089131608307533, -0.387095214016348, -0.483002021635509, -0.326790388032145,
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0.255357107325376, 0.483002021635509, 0.175227946595735, -0.326790388032145,
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-0.466553967085785, -0.089131608307533, 0.387095214016349, 0.434217976756762,
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0.326790388032145, 0.387095214016349, -0.255357107325376, -0.434217976756762,
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0.175227946595735, 0.466553967085786, -0.089131608307534, -0.483002021635509,
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0.387095214016349, 0.175227946595735, -0.483002021635509, 0.089131608307533,
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0.434217976756762, -0.326790388032145, -0.255357107325377, 0.466553967085785,
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0.434217976756762, -0.089131608307533, -0.326790388032145, 0.483002021635509,
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-0.255357107325376, -0.175227946595735, 0.466553967085785, -0.387095214016348,
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0.466553967085785, -0.326790388032145, 0.089131608307533, 0.175227946595735,
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-0.387095214016348, 0.483002021635509, -0.434217976756762, 0.255357107325376,
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0.483002021635509, -0.466553967085785, 0.434217976756762, -0.387095214016348,
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0.326790388032145, -0.255357107325375, 0.175227946595736, -0.089131608307532
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};
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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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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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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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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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float idct_16[256] = {
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0.250000, 0.351851, 0.346760, 0.338330, 0.326641, 0.311806, 0.293969, 0.273300,
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0.250000, 0.224292, 0.196424, 0.166664, 0.135299, 0.102631, 0.068975, 0.034654,
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0.250000, 0.338330, 0.293969, 0.224292, 0.135299, 0.034654, -0.068975, -0.166664,
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-0.250000, -0.311806, -0.346760, -0.351851, -0.326641, -0.273300, -0.196424, -0.102631,
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0.250000, 0.311806, 0.196424, 0.034654, -0.135299, -0.273300, -0.346760, -0.338330,
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-0.250000, -0.102631, 0.068975, 0.224292, 0.326641, 0.351851, 0.293969, 0.166664,
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0.250000, 0.273300, 0.068975, -0.166664, -0.326641, -0.338330, -0.196424, 0.034654,
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0.250000, 0.351851, 0.293969, 0.102631, -0.135299, -0.311806, -0.346760, -0.224292,
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0.250000, 0.224292, -0.068975, -0.311806, -0.326641, -0.102631, 0.196424, 0.351851,
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0.250000, -0.034654, -0.293969, -0.338330, -0.135299, 0.166664, 0.346760, 0.273300,
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0.250000, 0.166664, -0.196424, -0.351851, -0.135299, 0.224292, 0.346760, 0.102631,
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-0.250000, -0.338330, -0.068975, 0.273300, 0.326641, 0.034654, -0.293969, -0.311806,
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0.250000, 0.102631, -0.293969, -0.273300, 0.135299, 0.351851, 0.068975, -0.311806,
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-0.250000, 0.166664, 0.346760, 0.034654, -0.326641, -0.224292, 0.196424, 0.338330,
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0.250000, 0.034654, -0.346760, -0.102631, 0.326641, 0.166664, -0.293969, -0.224292,
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0.250000, 0.273300, -0.196424, -0.311806, 0.135299, 0.338330, -0.068975, -0.351851,
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0.250000, -0.034654, -0.346760, 0.102631, 0.326641, -0.166664, -0.293969, 0.224292,
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0.250000, -0.273300, -0.196424, 0.311806, 0.135299, -0.338330, -0.068975, 0.351851,
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0.250000, -0.102631, -0.293969, 0.273300, 0.135299, -0.351851, 0.068975, 0.311806,
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-0.250000, -0.166664, 0.346760, -0.034654, -0.326641, 0.224292, 0.196424, -0.338330,
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0.250000, -0.166664, -0.196424, 0.351851, -0.135299, -0.224292, 0.346760, -0.102631,
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-0.250000, 0.338330, -0.068975, -0.273300, 0.326641, -0.034654, -0.293969, 0.311806,
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0.250000, -0.224292, -0.068975, 0.311806, -0.326641, 0.102631, 0.196424, -0.351851,
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0.250000, 0.034654, -0.293969, 0.338330, -0.135299, -0.166664, 0.346760, -0.273300,
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0.250000, -0.273300, 0.068975, 0.166664, -0.326641, 0.338330, -0.196424, -0.034654,
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0.250000, -0.351851, 0.293969, -0.102631, -0.135299, 0.311806, -0.346760, 0.224292,
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0.250000, -0.311806, 0.196424, -0.034654, -0.135299, 0.273300, -0.346760, 0.338330,
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-0.250000, 0.102631, 0.068975, -0.224292, 0.326641, -0.351851, 0.293969, -0.166664,
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0.250000, -0.338330, 0.293969, -0.224292, 0.135299, -0.034654, -0.068975, 0.166664,
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-0.250000, 0.311806, -0.346760, 0.351851, -0.326641, 0.273300, -0.196424, 0.102631,
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0.250000, -0.351851, 0.346760, -0.338330, 0.326641, -0.311806, 0.293969, -0.273300,
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0.250000, -0.224292, 0.196424, -0.166664, 0.135299, -0.102631, 0.068975, -0.034654
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};
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float iadst_16[256] = {
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0.033094, 0.098087, 0.159534, 0.215215, 0.263118, 0.301511, 0.329007, 0.344612,
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0.347761, 0.338341, 0.316693, 0.283599, 0.240255, 0.188227, 0.129396, 0.065889,
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0.065889, 0.188227, 0.283599, 0.338341, 0.344612, 0.301511, 0.215215, 0.098087,
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-0.033094, -0.159534, -0.263118, -0.329007, -0.347761, -0.316693, -0.240255, -0.129396,
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0.098087, 0.263118, 0.344612, 0.316693, 0.188227, 0.000000, -0.188227, -0.316693,
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-0.344612, -0.263118, -0.098087, 0.098087, 0.263118, 0.344612, 0.316693, 0.188227,
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0.129396, 0.316693, 0.329007, 0.159534, -0.098087, -0.301511, -0.338341, -0.188227,
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0.065889, 0.283599, 0.344612, 0.215215, -0.033094, -0.263118, -0.347761, -0.240255,
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0.159534, 0.344612, 0.240255, -0.065889, -0.316693, -0.301511, -0.033094, 0.263118,
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0.338341, 0.129396, -0.188227, -0.347761, -0.215215, 0.098087, 0.329007, 0.283599,
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0.188227, 0.344612, 0.098087, -0.263118, -0.316693, -0.000000, 0.316693, 0.263118,
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-0.098087, -0.344612, -0.188227, 0.188227, 0.344612, 0.098087, -0.263118, -0.316693,
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0.215215, 0.316693, -0.065889, -0.347761, -0.098087, 0.301511, 0.240255, -0.188227,
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-0.329007, 0.033094, 0.344612, 0.129396, -0.283599, -0.263118, 0.159534, 0.338341,
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0.240255, 0.263118, -0.215215, -0.283599, 0.188227, 0.301511, -0.159534, -0.316693,
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0.129396, 0.329007, -0.098087, -0.338341, 0.065889, 0.344612, -0.033094, -0.347761,
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0.263118, 0.188227, -0.316693, -0.098087, 0.344612, 0.000000, -0.344612, 0.098087,
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0.316693, -0.188227, -0.263118, 0.263118, 0.188227, -0.316693, -0.098087, 0.344612,
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0.283599, 0.098087, -0.347761, 0.129396, 0.263118, -0.301511, -0.065889, 0.344612,
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-0.159534, -0.240255, 0.316693, 0.033094, -0.338341, 0.188227, 0.215215, -0.329007,
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0.301511, 0.000000, -0.301511, 0.301511, 0.000000, -0.301511, 0.301511, 0.000000,
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-0.301511, 0.301511, 0.000000, -0.301511, 0.301511, 0.000000, -0.301511, 0.301511,
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0.316693, -0.098087, -0.188227, 0.344612, -0.263118, -0.000000, 0.263118, -0.344612,
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0.188227, 0.098087, -0.316693, 0.316693, -0.098087, -0.188227, 0.344612, -0.263118,
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0.329007, -0.188227, -0.033094, 0.240255, -0.344612, 0.301511, -0.129396, -0.098087,
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0.283599, -0.347761, 0.263118, -0.065889, -0.159534, 0.316693, -0.338341, 0.215215,
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0.338341, -0.263118, 0.129396, 0.033094, -0.188227, 0.301511, -0.347761, 0.316693,
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-0.215215, 0.065889, 0.098087, -0.240255, 0.329007, -0.344612, 0.283599, -0.159534,
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0.344612, -0.316693, 0.263118, -0.188227, 0.098087, 0.000000, -0.098087, 0.188227,
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-0.263118, 0.316693, -0.344612, 0.344612, -0.316693, 0.263118, -0.188227, 0.098087,
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0.347761, -0.344612, 0.338341, -0.329007, 0.316693, -0.301511, 0.283599, -0.263118,
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0.240255, -0.215215, 0.188227, -0.159534, 0.129396, -0.098087, 0.065889, -0.033094
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};
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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,
|
|
4096, -5765, 4816, -1682, -2217, 5109, -5681, 3675,
|
|
4096, -5109, 3218, -568, -2217, 4478, -5681, 5543,
|
|
-4096, 1682, 1130, -3675, 5352, -5765, 4816, -2731,
|
|
4096, -5543, 4816, -3675, 2217, -568, -1130, 2731,
|
|
-4096, 5109, -5681, 5765, -5352, 4478, -3218, 1682,
|
|
4096, -5765, 5681, -5543, 5352, -5109, 4816, -4478,
|
|
4096, -3675, 3218, -2731, 2217, -1682, 1130, -568
|
|
};
|
|
|
|
const int16_t iadst_i16[256] = {
|
|
542, 1607, 2614, 3526, 4311, 4940, 5390, 5646,
|
|
5698, 5543, 5189, 4646, 3936, 3084, 2120, 1080,
|
|
1080, 3084, 4646, 5543, 5646, 4940, 3526, 1607,
|
|
-542, -2614, -4311, -5390, -5698, -5189, -3936, -2120,
|
|
1607, 4311, 5646, 5189, 3084, 0, -3084, -5189,
|
|
-5646, -4311, -1607, 1607, 4311, 5646, 5189, 3084,
|
|
2120, 5189, 5390, 2614, -1607, -4940, -5543, -3084,
|
|
1080, 4646, 5646, 3526, -542, -4311, -5698, -3936,
|
|
2614, 5646, 3936, -1080, -5189, -4940, -542, 4311,
|
|
5543, 2120, -3084, -5698, -3526, 1607, 5390, 4646,
|
|
3084, 5646, 1607, -4311, -5189, 0, 5189, 4311,
|
|
-1607, -5646, -3084, 3084, 5646, 1607, -4311, -5189,
|
|
3526, 5189, -1080, -5698, -1607, 4940, 3936, -3084,
|
|
-5390, 542, 5646, 2120, -4646, -4311, 2614, 5543,
|
|
3936, 4311, -3526, -4646, 3084, 4940, -2614, -5189,
|
|
2120, 5390, -1607, -5543, 1080, 5646, -542, -5698,
|
|
4311, 3084, -5189, -1607, 5646, 0, -5646, 1607,
|
|
5189, -3084, -4311, 4311, 3084, -5189, -1607, 5646,
|
|
4646, 1607, -5698, 2120, 4311, -4940, -1080, 5646,
|
|
-2614, -3936, 5189, 542, -5543, 3084, 3526, -5390,
|
|
4940, 0, -4940, 4940, 0, -4940, 4940, 0,
|
|
-4940, 4940, 0, -4940, 4940, 0, -4940, 4940,
|
|
5189, -1607, -3084, 5646, -4311, 0, 4311, -5646,
|
|
3084, 1607, -5189, 5189, -1607, -3084, 5646, -4311,
|
|
5390, -3084, -542, 3936, -5646, 4940, -2120, -1607,
|
|
4646, -5698, 4311, -1080, -2614, 5189, -5543, 3526,
|
|
5543, -4311, 2120, 542, -3084, 4940, -5698, 5189,
|
|
-3526, 1080, 1607, -3936, 5390, -5646, 4646, -2614,
|
|
5646, -5189, 4311, -3084, 1607, 0, -1607, 3084,
|
|
-4311, 5189, -5646, 5646, -5189, 4311, -3084, 1607,
|
|
5698, -5646, 5543, -5390, 5189, -4940, 4646, -4311,
|
|
3936, -3526, 3084, -2614, 2120, -1607, 1080, -542
|
|
};
|
|
|
|
/* For test */
|
|
#define TEST_INT 1
|
|
#if TEST_INT
|
|
#define vp8_ihtllm_int_c vp8_ihtllm_c
|
|
#else
|
|
#define vp8_ihtllm_float_c vp8_ihtllm_c
|
|
#endif
|
|
|
|
void vp8_ihtllm_float_c(const int16_t *input, int16_t *output, int pitch,
|
|
TX_TYPE tx_type, int tx_dim) {
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
{
|
|
int i, j, k;
|
|
float bufa[256], bufb[256]; // buffers are for floating-point test purpose
|
|
// the implementation could be simplified in
|
|
// conjunction with integer transform
|
|
const int16_t *ip = input;
|
|
int16_t *op = output;
|
|
int shortpitch = pitch >> 1;
|
|
|
|
float *pfa = &bufa[0];
|
|
float *pfb = &bufb[0];
|
|
|
|
// pointers to vertical and horizontal transforms
|
|
float *ptv, *pth;
|
|
|
|
assert(tx_type != DCT_DCT);
|
|
// load and convert residual array into floating-point
|
|
for(j = 0; j < tx_dim; j++) {
|
|
for(i = 0; i < tx_dim; i++) {
|
|
pfa[i] = (float)ip[i];
|
|
}
|
|
pfa += tx_dim;
|
|
ip += tx_dim;
|
|
}
|
|
|
|
// vertical transformation
|
|
pfa = &bufa[0];
|
|
pfb = &bufb[0];
|
|
|
|
switch(tx_type) {
|
|
case ADST_ADST :
|
|
case ADST_DCT :
|
|
ptv = (tx_dim == 4) ? &iadst_4[0] :
|
|
((tx_dim == 8) ? &iadst_8[0] : &iadst_16[0]);
|
|
break;
|
|
|
|
default :
|
|
ptv = (tx_dim == 4) ? &idct_4[0] :
|
|
((tx_dim == 8) ? &idct_8[0] : &idct_16[0]);
|
|
break;
|
|
}
|
|
|
|
for(j = 0; j < tx_dim; j++) {
|
|
for(i = 0; i < tx_dim; i++) {
|
|
pfb[i] = 0 ;
|
|
for(k = 0; k < tx_dim; k++) {
|
|
pfb[i] += ptv[k] * pfa[(k * tx_dim)];
|
|
}
|
|
pfa += 1;
|
|
}
|
|
|
|
pfb += tx_dim;
|
|
ptv += tx_dim;
|
|
pfa = &bufa[0];
|
|
}
|
|
|
|
// horizontal transformation
|
|
pfa = &bufa[0];
|
|
pfb = &bufb[0];
|
|
|
|
switch(tx_type) {
|
|
case ADST_ADST :
|
|
case DCT_ADST :
|
|
pth = (tx_dim == 4) ? &iadst_4[0] :
|
|
((tx_dim == 8) ? &iadst_8[0] : &iadst_16[0]);
|
|
break;
|
|
|
|
default :
|
|
pth = (tx_dim == 4) ? &idct_4[0] :
|
|
((tx_dim == 8) ? &idct_8[0] : &idct_16[0]);
|
|
break;
|
|
}
|
|
|
|
for(j = 0; j < tx_dim; j++) {
|
|
for(i = 0; i < tx_dim; i++) {
|
|
pfa[i] = 0;
|
|
for(k = 0; k < tx_dim; k++) {
|
|
pfa[i] += pfb[k] * pth[k];
|
|
}
|
|
pth += tx_dim;
|
|
}
|
|
|
|
pfa += tx_dim;
|
|
pfb += tx_dim;
|
|
|
|
switch(tx_type) {
|
|
case ADST_ADST :
|
|
case DCT_ADST :
|
|
pth = (tx_dim == 4) ? &iadst_4[0] :
|
|
((tx_dim == 8) ? &iadst_8[0] : &iadst_16[0]);
|
|
break;
|
|
|
|
default :
|
|
pth = (tx_dim == 4) ? &idct_4[0] :
|
|
((tx_dim == 8) ? &idct_8[0] : &idct_16[0]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// convert to short integer format and load BLOCKD buffer
|
|
op = output;
|
|
pfa = &bufa[0];
|
|
|
|
for(j = 0; j < tx_dim; j++) {
|
|
for(i = 0; i < tx_dim; i++) {
|
|
op[i] = (pfa[i] > 0 ) ? (int16_t)( pfa[i] / 8 + 0.49) :
|
|
-(int16_t)( - pfa[i] / 8 + 0.49);
|
|
}
|
|
|
|
op += shortpitch;
|
|
pfa += tx_dim;
|
|
}
|
|
}
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
}
|
|
|
|
/* Converted the transforms to integer form. */
|
|
#define VERTICAL_SHIFT 14 // 16
|
|
#define VERTICAL_ROUNDING ((1 << (VERTICAL_SHIFT - 1)) - 1)
|
|
#define HORIZONTAL_SHIFT 17 // 15
|
|
#define HORIZONTAL_ROUNDING ((1 << (HORIZONTAL_SHIFT - 1)) - 1)
|
|
void vp8_ihtllm_int_c(const int16_t *input, int16_t *output, int pitch,
|
|
TX_TYPE tx_type, int tx_dim) {
|
|
int i, j, k;
|
|
int16_t imbuf[256];
|
|
|
|
const int16_t *ip = input;
|
|
int16_t *op = output;
|
|
int16_t *im = &imbuf[0];
|
|
|
|
/* pointers to vertical and horizontal transforms. */
|
|
const int16_t *ptv = NULL, *pth = NULL;
|
|
int shortpitch = pitch >> 1;
|
|
|
|
switch (tx_type) {
|
|
case ADST_ADST :
|
|
ptv = pth = (tx_dim == 4) ? &iadst_i4[0]
|
|
: ((tx_dim == 8) ? &iadst_i8[0]
|
|
: &iadst_i16[0]);
|
|
break;
|
|
case ADST_DCT :
|
|
ptv = (tx_dim == 4) ? &iadst_i4[0]
|
|
: ((tx_dim == 8) ? &iadst_i8[0] : &iadst_i16[0]);
|
|
pth = (tx_dim == 4) ? &idct_i4[0]
|
|
: ((tx_dim == 8) ? &idct_i8[0] : &idct_i16[0]);
|
|
break;
|
|
case DCT_ADST :
|
|
ptv = (tx_dim == 4) ? &idct_i4[0]
|
|
: ((tx_dim == 8) ? &idct_i8[0] : &idct_i16[0]);
|
|
pth = (tx_dim == 4) ? &iadst_i4[0]
|
|
: ((tx_dim == 8) ? &iadst_i8[0] : &iadst_i16[0]);
|
|
break;
|
|
case DCT_DCT :
|
|
ptv = pth = (tx_dim == 4) ? &idct_i4[0]
|
|
: ((tx_dim == 8) ? &idct_i8[0]
|
|
: &idct_i16[0]);
|
|
break;
|
|
default:
|
|
assert(0);
|
|
break;
|
|
}
|
|
|
|
/* vertical transformation */
|
|
for (j = 0; j < tx_dim; j++) {
|
|
for (i = 0; i < tx_dim; i++) {
|
|
int temp = 0;
|
|
|
|
for (k = 0; k < tx_dim; k++) {
|
|
temp += ptv[k] * ip[(k * tx_dim)];
|
|
}
|
|
|
|
im[i] = (int16_t)((temp + VERTICAL_ROUNDING) >> VERTICAL_SHIFT);
|
|
ip++;
|
|
}
|
|
im += tx_dim; // 16
|
|
ptv += tx_dim;
|
|
ip = input;
|
|
}
|
|
|
|
/* horizontal transformation */
|
|
im = &imbuf[0];
|
|
|
|
for (j = 0; j < tx_dim; j++) {
|
|
const int16_t *pthc = pth;
|
|
|
|
for (i = 0; i < tx_dim; i++) {
|
|
int temp = 0;
|
|
|
|
for (k = 0; k < tx_dim; k++) {
|
|
temp += im[k] * pthc[k];
|
|
}
|
|
|
|
op[i] = (int16_t)((temp + HORIZONTAL_ROUNDING) >> HORIZONTAL_SHIFT);
|
|
pthc += tx_dim;
|
|
}
|
|
|
|
im += tx_dim; // 16
|
|
op += shortpitch;
|
|
}
|
|
}
|
|
|
|
void vp8_short_idct4x4llm_c(short *input, short *output, int pitch) {
|
|
int i;
|
|
int a1, b1, c1, d1;
|
|
|
|
short *ip = input;
|
|
short *op = output;
|
|
int temp1, temp2;
|
|
int shortpitch = pitch >> 1;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
a1 = ip[0] + ip[8];
|
|
b1 = ip[0] - ip[8];
|
|
|
|
temp1 = (ip[4] * sinpi8sqrt2 + rounding) >> 16;
|
|
temp2 = ip[12] + ((ip[12] * cospi8sqrt2minus1 + rounding) >> 16);
|
|
c1 = temp1 - temp2;
|
|
|
|
temp1 = ip[4] + ((ip[4] * cospi8sqrt2minus1 + rounding) >> 16);
|
|
temp2 = (ip[12] * sinpi8sqrt2 + rounding) >> 16;
|
|
d1 = temp1 + temp2;
|
|
|
|
op[shortpitch * 0] = a1 + d1;
|
|
op[shortpitch * 3] = a1 - d1;
|
|
|
|
op[shortpitch * 1] = b1 + c1;
|
|
op[shortpitch * 2] = b1 - c1;
|
|
|
|
ip++;
|
|
op++;
|
|
}
|
|
|
|
ip = output;
|
|
op = output;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
a1 = ip[0] + ip[2];
|
|
b1 = ip[0] - ip[2];
|
|
|
|
temp1 = (ip[1] * sinpi8sqrt2 + rounding) >> 16;
|
|
temp2 = ip[3] + ((ip[3] * cospi8sqrt2minus1 + rounding) >> 16);
|
|
c1 = temp1 - temp2;
|
|
|
|
temp1 = ip[1] + ((ip[1] * cospi8sqrt2minus1 + rounding) >> 16);
|
|
temp2 = (ip[3] * sinpi8sqrt2 + rounding) >> 16;
|
|
d1 = temp1 + temp2;
|
|
|
|
op[0] = (a1 + d1 + 16) >> 5;
|
|
op[3] = (a1 - d1 + 16) >> 5;
|
|
|
|
op[1] = (b1 + c1 + 16) >> 5;
|
|
op[2] = (b1 - c1 + 16) >> 5;
|
|
|
|
ip += shortpitch;
|
|
op += shortpitch;
|
|
}
|
|
}
|
|
|
|
void vp8_short_idct4x4llm_1_c(short *input, short *output, int pitch) {
|
|
int i;
|
|
int a1;
|
|
short *op = output;
|
|
int shortpitch = pitch >> 1;
|
|
a1 = ((input[0] + 16) >> 5);
|
|
for (i = 0; i < 4; i++) {
|
|
op[0] = a1;
|
|
op[1] = a1;
|
|
op[2] = a1;
|
|
op[3] = a1;
|
|
op += shortpitch;
|
|
}
|
|
}
|
|
|
|
void vp8_dc_only_idct_add_c(short input_dc, unsigned char *pred_ptr, unsigned char *dst_ptr, int pitch, int stride) {
|
|
int a1 = ((input_dc + 16) >> 5);
|
|
int r, c;
|
|
|
|
for (r = 0; r < 4; r++) {
|
|
for (c = 0; c < 4; c++) {
|
|
int a = a1 + pred_ptr[c];
|
|
|
|
if (a < 0)
|
|
a = 0;
|
|
|
|
if (a > 255)
|
|
a = 255;
|
|
|
|
dst_ptr[c] = (unsigned char) a;
|
|
}
|
|
|
|
dst_ptr += stride;
|
|
pred_ptr += pitch;
|
|
}
|
|
|
|
}
|
|
|
|
void vp8_short_inv_walsh4x4_c(short *input, short *output) {
|
|
int i;
|
|
int a1, b1, c1, d1;
|
|
short *ip = input;
|
|
short *op = output;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
a1 = ((ip[0] + ip[3]));
|
|
b1 = ((ip[1] + ip[2]));
|
|
c1 = ((ip[1] - ip[2]));
|
|
d1 = ((ip[0] - ip[3]));
|
|
|
|
op[0] = (a1 + b1 + 1) >> 1;
|
|
op[1] = (c1 + d1) >> 1;
|
|
op[2] = (a1 - b1) >> 1;
|
|
op[3] = (d1 - c1) >> 1;
|
|
|
|
ip += 4;
|
|
op += 4;
|
|
}
|
|
|
|
ip = output;
|
|
op = output;
|
|
for (i = 0; i < 4; i++) {
|
|
a1 = ip[0] + ip[12];
|
|
b1 = ip[4] + ip[8];
|
|
c1 = ip[4] - ip[8];
|
|
d1 = ip[0] - ip[12];
|
|
op[0] = (a1 + b1 + 1) >> 1;
|
|
op[4] = (c1 + d1) >> 1;
|
|
op[8] = (a1 - b1) >> 1;
|
|
op[12] = (d1 - c1) >> 1;
|
|
ip++;
|
|
op++;
|
|
}
|
|
}
|
|
|
|
void vp8_short_inv_walsh4x4_1_c(short *in, short *out) {
|
|
int i;
|
|
short tmp[4];
|
|
short *ip = in;
|
|
short *op = tmp;
|
|
|
|
op[0] = (ip[0] + 1) >> 1;
|
|
op[1] = op[2] = op[3] = (ip[0] >> 1);
|
|
|
|
ip = tmp;
|
|
op = out;
|
|
for (i = 0; i < 4; i++) {
|
|
op[0] = (ip[0] + 1) >> 1;
|
|
op[4] = op[8] = op[12] = (ip[0] >> 1);
|
|
ip++;
|
|
op++;
|
|
}
|
|
}
|
|
|
|
#if CONFIG_LOSSLESS
|
|
void vp8_short_inv_walsh4x4_lossless_c(short *input, short *output) {
|
|
int i;
|
|
int a1, b1, c1, d1;
|
|
short *ip = input;
|
|
short *op = output;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
a1 = ((ip[0] + ip[3])) >> Y2_WHT_UPSCALE_FACTOR;
|
|
b1 = ((ip[1] + ip[2])) >> Y2_WHT_UPSCALE_FACTOR;
|
|
c1 = ((ip[1] - ip[2])) >> Y2_WHT_UPSCALE_FACTOR;
|
|
d1 = ((ip[0] - ip[3])) >> Y2_WHT_UPSCALE_FACTOR;
|
|
|
|
op[0] = (a1 + b1 + 1) >> 1;
|
|
op[1] = (c1 + d1) >> 1;
|
|
op[2] = (a1 - b1) >> 1;
|
|
op[3] = (d1 - c1) >> 1;
|
|
|
|
ip += 4;
|
|
op += 4;
|
|
}
|
|
|
|
ip = output;
|
|
op = output;
|
|
for (i = 0; i < 4; i++) {
|
|
a1 = ip[0] + ip[12];
|
|
b1 = ip[4] + ip[8];
|
|
c1 = ip[4] - ip[8];
|
|
d1 = ip[0] - ip[12];
|
|
|
|
|
|
op[0] = ((a1 + b1 + 1) >> 1) << Y2_WHT_UPSCALE_FACTOR;
|
|
op[4] = ((c1 + d1) >> 1) << Y2_WHT_UPSCALE_FACTOR;
|
|
op[8] = ((a1 - b1) >> 1) << Y2_WHT_UPSCALE_FACTOR;
|
|
op[12] = ((d1 - c1) >> 1) << Y2_WHT_UPSCALE_FACTOR;
|
|
|
|
ip++;
|
|
op++;
|
|
}
|
|
}
|
|
|
|
void vp8_short_inv_walsh4x4_1_lossless_c(short *in, short *out) {
|
|
int i;
|
|
short tmp[4];
|
|
short *ip = in;
|
|
short *op = tmp;
|
|
|
|
op[0] = ((ip[0] >> Y2_WHT_UPSCALE_FACTOR) + 1) >> 1;
|
|
op[1] = op[2] = op[3] = ((ip[0] >> Y2_WHT_UPSCALE_FACTOR) >> 1);
|
|
|
|
ip = tmp;
|
|
op = out;
|
|
for (i = 0; i < 4; i++) {
|
|
op[0] = ((ip[0] + 1) >> 1) << Y2_WHT_UPSCALE_FACTOR;
|
|
op[4] = op[8] = op[12] = ((ip[0] >> 1)) << Y2_WHT_UPSCALE_FACTOR;
|
|
ip++;
|
|
op++;
|
|
}
|
|
}
|
|
|
|
void vp8_short_inv_walsh4x4_x8_c(short *input, short *output, int pitch) {
|
|
int i;
|
|
int a1, b1, c1, d1;
|
|
short *ip = input;
|
|
short *op = output;
|
|
int shortpitch = pitch >> 1;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
a1 = ((ip[0] + ip[3])) >> WHT_UPSCALE_FACTOR;
|
|
b1 = ((ip[1] + ip[2])) >> WHT_UPSCALE_FACTOR;
|
|
c1 = ((ip[1] - ip[2])) >> WHT_UPSCALE_FACTOR;
|
|
d1 = ((ip[0] - ip[3])) >> WHT_UPSCALE_FACTOR;
|
|
|
|
op[0] = (a1 + b1 + 1) >> 1;
|
|
op[1] = (c1 + d1) >> 1;
|
|
op[2] = (a1 - b1) >> 1;
|
|
op[3] = (d1 - c1) >> 1;
|
|
|
|
ip += 4;
|
|
op += shortpitch;
|
|
}
|
|
|
|
ip = output;
|
|
op = output;
|
|
for (i = 0; i < 4; i++) {
|
|
a1 = ip[shortpitch * 0] + ip[shortpitch * 3];
|
|
b1 = ip[shortpitch * 1] + ip[shortpitch * 2];
|
|
c1 = ip[shortpitch * 1] - ip[shortpitch * 2];
|
|
d1 = ip[shortpitch * 0] - ip[shortpitch * 3];
|
|
|
|
|
|
op[shortpitch * 0] = (a1 + b1 + 1) >> 1;
|
|
op[shortpitch * 1] = (c1 + d1) >> 1;
|
|
op[shortpitch * 2] = (a1 - b1) >> 1;
|
|
op[shortpitch * 3] = (d1 - c1) >> 1;
|
|
|
|
ip++;
|
|
op++;
|
|
}
|
|
}
|
|
|
|
void vp8_short_inv_walsh4x4_1_x8_c(short *in, short *out, int pitch) {
|
|
int i;
|
|
short tmp[4];
|
|
short *ip = in;
|
|
short *op = tmp;
|
|
int shortpitch = pitch >> 1;
|
|
|
|
op[0] = ((ip[0] >> WHT_UPSCALE_FACTOR) + 1) >> 1;
|
|
op[1] = op[2] = op[3] = ((ip[0] >> WHT_UPSCALE_FACTOR) >> 1);
|
|
|
|
|
|
ip = tmp;
|
|
op = out;
|
|
for (i = 0; i < 4; i++) {
|
|
op[shortpitch * 0] = (ip[0] + 1) >> 1;
|
|
op[shortpitch * 1] = op[shortpitch * 2] = op[shortpitch * 3] = ip[0] >> 1;
|
|
ip++;
|
|
op++;
|
|
}
|
|
}
|
|
|
|
void vp8_dc_only_inv_walsh_add_c(short input_dc, unsigned char *pred_ptr, unsigned char *dst_ptr, int pitch, int stride) {
|
|
int r, c;
|
|
short tmp[16];
|
|
vp8_short_inv_walsh4x4_1_x8_c(&input_dc, tmp, 4 << 1);
|
|
|
|
for (r = 0; r < 4; r++) {
|
|
for (c = 0; c < 4; c++) {
|
|
int a = tmp[r * 4 + c] + pred_ptr[c];
|
|
if (a < 0)
|
|
a = 0;
|
|
|
|
if (a > 255)
|
|
a = 255;
|
|
|
|
dst_ptr[c] = (unsigned char) a;
|
|
}
|
|
|
|
dst_ptr += stride;
|
|
pred_ptr += pitch;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void vp8_dc_only_idct_add_8x8_c(short input_dc,
|
|
unsigned char *pred_ptr,
|
|
unsigned char *dst_ptr,
|
|
int pitch, int stride) {
|
|
int a1 = ((input_dc + 16) >> 5);
|
|
int r, c, b;
|
|
unsigned char *orig_pred = pred_ptr;
|
|
unsigned char *orig_dst = dst_ptr;
|
|
for (b = 0; b < 4; b++) {
|
|
for (r = 0; r < 4; r++) {
|
|
for (c = 0; c < 4; c++) {
|
|
int a = a1 + pred_ptr[c];
|
|
|
|
if (a < 0)
|
|
a = 0;
|
|
|
|
if (a > 255)
|
|
a = 255;
|
|
|
|
dst_ptr[c] = (unsigned char) a;
|
|
}
|
|
|
|
dst_ptr += stride;
|
|
pred_ptr += pitch;
|
|
}
|
|
dst_ptr = orig_dst + (b + 1) % 2 * 4 + (b + 1) / 2 * 4 * stride;
|
|
pred_ptr = orig_pred + (b + 1) % 2 * 4 + (b + 1) / 2 * 4 * pitch;
|
|
}
|
|
}
|
|
|
|
#define W1 2841 /* 2048*sqrt(2)*cos(1*pi/16) */
|
|
#define W2 2676 /* 2048*sqrt(2)*cos(2*pi/16) */
|
|
#define W3 2408 /* 2048*sqrt(2)*cos(3*pi/16) */
|
|
#define W5 1609 /* 2048*sqrt(2)*cos(5*pi/16) */
|
|
#define W6 1108 /* 2048*sqrt(2)*cos(6*pi/16) */
|
|
#define W7 565 /* 2048*sqrt(2)*cos(7*pi/16) */
|
|
|
|
/* row (horizontal) IDCT
|
|
*
|
|
* 7 pi 1 dst[k] = sum c[l] * src[l] * cos( -- *
|
|
* ( k + - ) * l ) l=0 8 2
|
|
*
|
|
* where: c[0] = 128 c[1..7] = 128*sqrt(2) */
|
|
|
|
static void idctrow(int *blk) {
|
|
int x0, x1, x2, x3, x4, x5, x6, x7, x8;
|
|
/* shortcut */
|
|
if (!((x1 = blk[4] << 11) | (x2 = blk[6]) | (x3 = blk[2]) |
|
|
(x4 = blk[1]) | (x5 = blk[7]) | (x6 = blk[5]) | (x7 = blk[3]))) {
|
|
blk[0] = blk[1] = blk[2] = blk[3] = blk[4]
|
|
= blk[5] = blk[6] = blk[7] = blk[0] << 3;
|
|
return;
|
|
}
|
|
|
|
x0 = (blk[0] << 11) + 128; /* for proper rounding in the fourth stage */
|
|
/* first stage */
|
|
x8 = W7 * (x4 + x5);
|
|
x4 = x8 + (W1 - W7) * x4;
|
|
x5 = x8 - (W1 + W7) * x5;
|
|
x8 = W3 * (x6 + x7);
|
|
x6 = x8 - (W3 - W5) * x6;
|
|
x7 = x8 - (W3 + W5) * x7;
|
|
|
|
/* second stage */
|
|
x8 = x0 + x1;
|
|
x0 -= x1;
|
|
x1 = W6 * (x3 + x2);
|
|
x2 = x1 - (W2 + W6) * x2;
|
|
x3 = x1 + (W2 - W6) * x3;
|
|
x1 = x4 + x6;
|
|
x4 -= x6;
|
|
x6 = x5 + x7;
|
|
x5 -= x7;
|
|
|
|
/* third stage */
|
|
x7 = x8 + x3;
|
|
x8 -= x3;
|
|
x3 = x0 + x2;
|
|
x0 -= x2;
|
|
x2 = (181 * (x4 + x5) + 128) >> 8;
|
|
x4 = (181 * (x4 - x5) + 128) >> 8;
|
|
|
|
/* fourth stage */
|
|
blk[0] = (x7 + x1) >> 8;
|
|
blk[1] = (x3 + x2) >> 8;
|
|
blk[2] = (x0 + x4) >> 8;
|
|
blk[3] = (x8 + x6) >> 8;
|
|
blk[4] = (x8 - x6) >> 8;
|
|
blk[5] = (x0 - x4) >> 8;
|
|
blk[6] = (x3 - x2) >> 8;
|
|
blk[7] = (x7 - x1) >> 8;
|
|
}
|
|
|
|
/* column (vertical) IDCT
|
|
*
|
|
* 7 pi 1 dst[8*k] = sum c[l] * src[8*l] *
|
|
* cos( -- * ( k + - ) * l ) l=0 8 2
|
|
*
|
|
* where: c[0] = 1/1024 c[1..7] = (1/1024)*sqrt(2) */
|
|
static void idctcol(int *blk) {
|
|
int x0, x1, x2, x3, x4, x5, x6, x7, x8;
|
|
|
|
/* shortcut */
|
|
if (!((x1 = (blk[8 * 4] << 8)) | (x2 = blk[8 * 6]) | (x3 = blk[8 * 2]) |
|
|
(x4 = blk[8 * 1]) | (x5 = blk[8 * 7]) | (x6 = blk[8 * 5]) |
|
|
(x7 = blk[8 * 3]))) {
|
|
blk[8 * 0] = blk[8 * 1] = blk[8 * 2] = blk[8 * 3]
|
|
= blk[8 * 4] = blk[8 * 5] = blk[8 * 6]
|
|
= blk[8 * 7] = ((blk[8 * 0] + 32) >> 6);
|
|
return;
|
|
}
|
|
|
|
x0 = (blk[8 * 0] << 8) + 16384;
|
|
|
|
/* first stage */
|
|
x8 = W7 * (x4 + x5) + 4;
|
|
x4 = (x8 + (W1 - W7) * x4) >> 3;
|
|
x5 = (x8 - (W1 + W7) * x5) >> 3;
|
|
x8 = W3 * (x6 + x7) + 4;
|
|
x6 = (x8 - (W3 - W5) * x6) >> 3;
|
|
x7 = (x8 - (W3 + W5) * x7) >> 3;
|
|
|
|
/* second stage */
|
|
x8 = x0 + x1;
|
|
x0 -= x1;
|
|
x1 = W6 * (x3 + x2) + 4;
|
|
x2 = (x1 - (W2 + W6) * x2) >> 3;
|
|
x3 = (x1 + (W2 - W6) * x3) >> 3;
|
|
x1 = x4 + x6;
|
|
x4 -= x6;
|
|
x6 = x5 + x7;
|
|
x5 -= x7;
|
|
|
|
/* third stage */
|
|
x7 = x8 + x3;
|
|
x8 -= x3;
|
|
x3 = x0 + x2;
|
|
x0 -= x2;
|
|
x2 = (181 * (x4 + x5) + 128) >> 8;
|
|
x4 = (181 * (x4 - x5) + 128) >> 8;
|
|
|
|
/* fourth stage */
|
|
blk[8 * 0] = (x7 + x1) >> 14;
|
|
blk[8 * 1] = (x3 + x2) >> 14;
|
|
blk[8 * 2] = (x0 + x4) >> 14;
|
|
blk[8 * 3] = (x8 + x6) >> 14;
|
|
blk[8 * 4] = (x8 - x6) >> 14;
|
|
blk[8 * 5] = (x0 - x4) >> 14;
|
|
blk[8 * 6] = (x3 - x2) >> 14;
|
|
blk[8 * 7] = (x7 - x1) >> 14;
|
|
}
|
|
|
|
#define TX_DIM 8
|
|
void vp8_short_idct8x8_c(short *coefs, short *block, int pitch) {
|
|
int X[TX_DIM * TX_DIM];
|
|
int i, j;
|
|
int shortpitch = pitch >> 1;
|
|
|
|
for (i = 0; i < TX_DIM; i++) {
|
|
for (j = 0; j < TX_DIM; j++) {
|
|
X[i * TX_DIM + j] = (int)(coefs[i * TX_DIM + j] + 1
|
|
+ (coefs[i * TX_DIM + j] < 0)) >> 2;
|
|
}
|
|
}
|
|
for (i = 0; i < 8; i++)
|
|
idctrow(X + 8 * i);
|
|
|
|
for (i = 0; i < 8; i++)
|
|
idctcol(X + i);
|
|
|
|
for (i = 0; i < TX_DIM; i++) {
|
|
for (j = 0; j < TX_DIM; j++) {
|
|
block[i * shortpitch + j] = X[i * TX_DIM + j] >> 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void vp8_short_ihaar2x2_c(short *input, short *output, int pitch) {
|
|
int i;
|
|
short *ip = input; // 0,1, 4, 8
|
|
short *op = output;
|
|
for (i = 0; i < 16; i++) {
|
|
op[i] = 0;
|
|
}
|
|
|
|
op[0] = (ip[0] + ip[1] + ip[4] + ip[8] + 1) >> 1;
|
|
op[1] = (ip[0] - ip[1] + ip[4] - ip[8]) >> 1;
|
|
op[4] = (ip[0] + ip[1] - ip[4] - ip[8]) >> 1;
|
|
op[8] = (ip[0] - ip[1] - ip[4] + ip[8]) >> 1;
|
|
}
|
|
|
|
|
|
#if 0
|
|
// Keep a really bad float version as reference for now.
|
|
void vp8_short_idct16x16_c(short *input, short *output, int pitch) {
|
|
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
{
|
|
double x;
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j, k, l;
|
|
for (l = 0; l < 16; ++l) {
|
|
for (k = 0; k < 16; ++k) {
|
|
double s = 0;
|
|
for (i = 0; i < 16; ++i) {
|
|
for (j = 0; j < 16; ++j) {
|
|
x=cos(PI*j*(l+0.5)/16.0)*cos(PI*i*(k+0.5)/16.0)*input[i*16+j]/32;
|
|
if (i != 0)
|
|
x *= sqrt(2.0);
|
|
if (j != 0)
|
|
x *= sqrt(2.0);
|
|
s += x;
|
|
}
|
|
}
|
|
output[k*short_pitch+l] = (short)round(s);
|
|
}
|
|
}
|
|
}
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
}
|
|
#endif
|
|
|
|
static const double C1 = 0.995184726672197;
|
|
static const double C2 = 0.98078528040323;
|
|
static const double C3 = 0.956940335732209;
|
|
static const double C4 = 0.923879532511287;
|
|
static const double C5 = 0.881921264348355;
|
|
static const double C6 = 0.831469612302545;
|
|
static const double C7 = 0.773010453362737;
|
|
static const double C8 = 0.707106781186548;
|
|
static const double C9 = 0.634393284163646;
|
|
static const double C10 = 0.555570233019602;
|
|
static const double C11 = 0.471396736825998;
|
|
static const double C12 = 0.38268343236509;
|
|
static const double C13 = 0.290284677254462;
|
|
static const double C14 = 0.195090322016128;
|
|
static const double C15 = 0.098017140329561;
|
|
|
|
|
|
static void butterfly_16x16_idct_1d(double input[16], double output[16]) {
|
|
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
{
|
|
double step[16];
|
|
double intermediate[16];
|
|
double temp1, temp2;
|
|
|
|
|
|
// step 1 and 2
|
|
step[ 0] = input[0] + input[8];
|
|
step[ 1] = input[0] - input[8];
|
|
|
|
temp1 = input[4]*C12;
|
|
temp2 = input[12]*C4;
|
|
|
|
temp1 -= temp2;
|
|
temp1 *= C8;
|
|
|
|
step[ 2] = 2*(temp1);
|
|
|
|
temp1 = input[4]*C4;
|
|
temp2 = input[12]*C12;
|
|
temp1 += temp2;
|
|
temp1 = (temp1);
|
|
temp1 *= C8;
|
|
step[ 3] = 2*(temp1);
|
|
|
|
temp1 = input[2]*C8;
|
|
temp1 = 2*(temp1);
|
|
temp2 = input[6] + input[10];
|
|
|
|
step[ 4] = temp1 + temp2;
|
|
step[ 5] = temp1 - temp2;
|
|
|
|
temp1 = input[14]*C8;
|
|
temp1 = 2*(temp1);
|
|
temp2 = input[6] - input[10];
|
|
|
|
step[ 6] = temp2 - temp1;
|
|
step[ 7] = temp2 + temp1;
|
|
|
|
// for odd input
|
|
temp1 = input[3]*C12;
|
|
temp2 = input[13]*C4;
|
|
temp1 += temp2;
|
|
temp1 = (temp1);
|
|
temp1 *= C8;
|
|
intermediate[ 8] = 2*(temp1);
|
|
|
|
temp1 = input[3]*C4;
|
|
temp2 = input[13]*C12;
|
|
temp2 -= temp1;
|
|
temp2 = (temp2);
|
|
temp2 *= C8;
|
|
intermediate[ 9] = 2*(temp2);
|
|
|
|
intermediate[10] = 2*(input[9]*C8);
|
|
intermediate[11] = input[15] - input[1];
|
|
intermediate[12] = input[15] + input[1];
|
|
intermediate[13] = 2*((input[7]*C8));
|
|
|
|
temp1 = input[11]*C12;
|
|
temp2 = input[5]*C4;
|
|
temp2 -= temp1;
|
|
temp2 = (temp2);
|
|
temp2 *= C8;
|
|
intermediate[14] = 2*(temp2);
|
|
|
|
temp1 = input[11]*C4;
|
|
temp2 = input[5]*C12;
|
|
temp1 += temp2;
|
|
temp1 = (temp1);
|
|
temp1 *= C8;
|
|
intermediate[15] = 2*(temp1);
|
|
|
|
step[ 8] = intermediate[ 8] + intermediate[14];
|
|
step[ 9] = intermediate[ 9] + intermediate[15];
|
|
step[10] = intermediate[10] + intermediate[11];
|
|
step[11] = intermediate[10] - intermediate[11];
|
|
step[12] = intermediate[12] + intermediate[13];
|
|
step[13] = intermediate[12] - intermediate[13];
|
|
step[14] = intermediate[ 8] - intermediate[14];
|
|
step[15] = intermediate[ 9] - intermediate[15];
|
|
|
|
// step 3
|
|
output[0] = step[ 0] + step[ 3];
|
|
output[1] = step[ 1] + step[ 2];
|
|
output[2] = step[ 1] - step[ 2];
|
|
output[3] = step[ 0] - step[ 3];
|
|
|
|
temp1 = step[ 4]*C14;
|
|
temp2 = step[ 7]*C2;
|
|
temp1 -= temp2;
|
|
output[4] = (temp1);
|
|
|
|
temp1 = step[ 4]*C2;
|
|
temp2 = step[ 7]*C14;
|
|
temp1 += temp2;
|
|
output[7] = (temp1);
|
|
|
|
temp1 = step[ 5]*C10;
|
|
temp2 = step[ 6]*C6;
|
|
temp1 -= temp2;
|
|
output[5] = (temp1);
|
|
|
|
temp1 = step[ 5]*C6;
|
|
temp2 = step[ 6]*C10;
|
|
temp1 += temp2;
|
|
output[6] = (temp1);
|
|
|
|
output[8] = step[ 8] + step[11];
|
|
output[9] = step[ 9] + step[10];
|
|
output[10] = step[ 9] - step[10];
|
|
output[11] = step[ 8] - step[11];
|
|
output[12] = step[12] + step[15];
|
|
output[13] = step[13] + step[14];
|
|
output[14] = step[13] - step[14];
|
|
output[15] = step[12] - step[15];
|
|
|
|
// output 4
|
|
step[ 0] = output[0] + output[7];
|
|
step[ 1] = output[1] + output[6];
|
|
step[ 2] = output[2] + output[5];
|
|
step[ 3] = output[3] + output[4];
|
|
step[ 4] = output[3] - output[4];
|
|
step[ 5] = output[2] - output[5];
|
|
step[ 6] = output[1] - output[6];
|
|
step[ 7] = output[0] - output[7];
|
|
|
|
temp1 = output[8]*C7;
|
|
temp2 = output[15]*C9;
|
|
temp1 -= temp2;
|
|
step[ 8] = (temp1);
|
|
|
|
temp1 = output[9]*C11;
|
|
temp2 = output[14]*C5;
|
|
temp1 += temp2;
|
|
step[ 9] = (temp1);
|
|
|
|
temp1 = output[10]*C3;
|
|
temp2 = output[13]*C13;
|
|
temp1 -= temp2;
|
|
step[10] = (temp1);
|
|
|
|
temp1 = output[11]*C15;
|
|
temp2 = output[12]*C1;
|
|
temp1 += temp2;
|
|
step[11] = (temp1);
|
|
|
|
temp1 = output[11]*C1;
|
|
temp2 = output[12]*C15;
|
|
temp2 -= temp1;
|
|
step[12] = (temp2);
|
|
|
|
temp1 = output[10]*C13;
|
|
temp2 = output[13]*C3;
|
|
temp1 += temp2;
|
|
step[13] = (temp1);
|
|
|
|
temp1 = output[9]*C5;
|
|
temp2 = output[14]*C11;
|
|
temp2 -= temp1;
|
|
step[14] = (temp2);
|
|
|
|
temp1 = output[8]*C9;
|
|
temp2 = output[15]*C7;
|
|
temp1 += temp2;
|
|
step[15] = (temp1);
|
|
|
|
// step 5
|
|
output[0] = (step[0] + step[15]);
|
|
output[1] = (step[1] + step[14]);
|
|
output[2] = (step[2] + step[13]);
|
|
output[3] = (step[3] + step[12]);
|
|
output[4] = (step[4] + step[11]);
|
|
output[5] = (step[5] + step[10]);
|
|
output[6] = (step[6] + step[ 9]);
|
|
output[7] = (step[7] + step[ 8]);
|
|
|
|
output[15] = (step[0] - step[15]);
|
|
output[14] = (step[1] - step[14]);
|
|
output[13] = (step[2] - step[13]);
|
|
output[12] = (step[3] - step[12]);
|
|
output[11] = (step[4] - step[11]);
|
|
output[10] = (step[5] - step[10]);
|
|
output[9] = (step[6] - step[ 9]);
|
|
output[8] = (step[7] - step[ 8]);
|
|
}
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
}
|
|
|
|
// Remove once an int version of iDCT is written
|
|
#if 0
|
|
void reference_16x16_idct_1d(double input[16], double output[16]) {
|
|
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
{
|
|
const double kPi = 3.141592653589793238462643383279502884;
|
|
const double kSqrt2 = 1.414213562373095048801688724209698;
|
|
for (int k = 0; k < 16; k++) {
|
|
output[k] = 0.0;
|
|
for (int n = 0; n < 16; n++) {
|
|
output[k] += input[n]*cos(kPi*(2*k+1)*n/32.0);
|
|
if (n == 0)
|
|
output[k] = output[k]/kSqrt2;
|
|
}
|
|
}
|
|
}
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
}
|
|
#endif
|
|
|
|
void vp8_short_idct16x16_c(short *input, short *output, int pitch) {
|
|
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
{
|
|
double out[16*16], out2[16*16];
|
|
const int short_pitch = pitch >> 1;
|
|
int i, j;
|
|
// First transform rows
|
|
for (i = 0; i < 16; ++i) {
|
|
double temp_in[16], temp_out[16];
|
|
for (j = 0; j < 16; ++j)
|
|
temp_in[j] = input[j + i*short_pitch];
|
|
butterfly_16x16_idct_1d(temp_in, temp_out);
|
|
for (j = 0; j < 16; ++j)
|
|
out[j + i*16] = temp_out[j];
|
|
}
|
|
// Then transform columns
|
|
for (i = 0; i < 16; ++i) {
|
|
double temp_in[16], temp_out[16];
|
|
for (j = 0; j < 16; ++j)
|
|
temp_in[j] = out[j*16 + i];
|
|
butterfly_16x16_idct_1d(temp_in, temp_out);
|
|
for (j = 0; j < 16; ++j)
|
|
out2[j*16 + i] = temp_out[j];
|
|
}
|
|
for (i = 0; i < 16*16; ++i)
|
|
output[i] = round(out2[i]/128);
|
|
}
|
|
vp8_clear_system_state(); // Make it simd safe : __asm emms;
|
|
}
|