1474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/* 2474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 4474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * Use of this source code is governed by a BSD-style license 5474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * that can be found in the LICENSE file in the root of the source 6474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * tree. An additional intellectual property rights grant can be found 7474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * in the file PATENTS. All contributing project authors may 8474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * be found in the AUTHORS file in the root of the source tree. 9474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org */ 10474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 11474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 12474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org#include <math.h> 13474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 14474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgvoid vp8_short_fdct4x4_c(short *input, short *output, int pitch) 15474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org{ 16474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org int i; 17474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org int a1, b1, c1, d1; 18474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org short *ip = input; 19474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org short *op = output; 20474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 21474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org for (i = 0; i < 4; i++) 22474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org { 23085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org a1 = ((ip[0] + ip[3]) * 8); 24085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org b1 = ((ip[1] + ip[2]) * 8); 25085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org c1 = ((ip[1] - ip[2]) * 8); 26085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org d1 = ((ip[0] - ip[3]) * 8); 27474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 28474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[0] = a1 + b1; 29474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[2] = a1 - b1; 30474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 31474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[1] = (c1 * 2217 + d1 * 5352 + 14500)>>12; 32474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[3] = (d1 * 2217 - c1 * 5352 + 7500)>>12; 33474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 34474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ip += pitch / 2; 35474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op += 4; 36474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 37474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 38474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ip = output; 39474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op = output; 40474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org for (i = 0; i < 4; i++) 41474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org { 42474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org a1 = ip[0] + ip[12]; 43474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org b1 = ip[4] + ip[8]; 44474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org c1 = ip[4] - ip[8]; 45474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org d1 = ip[0] - ip[12]; 46474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 47474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[0] = ( a1 + b1 + 7)>>4; 48474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[8] = ( a1 - b1 + 7)>>4; 49474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 50474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[4] =((c1 * 2217 + d1 * 5352 + 12000)>>16) + (d1!=0); 51474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[12] = (d1 * 2217 - c1 * 5352 + 51000)>>16; 52474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 53474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ip++; 54474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op++; 55474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 56474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} 57474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 58474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgvoid vp8_short_fdct8x4_c(short *input, short *output, int pitch) 59474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org{ 60474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org vp8_short_fdct4x4_c(input, output, pitch); 61474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org vp8_short_fdct4x4_c(input + 4, output + 16, pitch); 62474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} 63474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 64474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgvoid vp8_short_walsh4x4_c(short *input, short *output, int pitch) 65474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org{ 66474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org int i; 67474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org int a1, b1, c1, d1; 68474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org int a2, b2, c2, d2; 69474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org short *ip = input; 70474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org short *op = output; 71474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 72474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 73474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org for (i = 0; i < 4; i++) 74474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org { 75085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org a1 = ((ip[0] + ip[2]) * 4); 76085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org d1 = ((ip[1] + ip[3]) * 4); 77085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org c1 = ((ip[1] - ip[3]) * 4); 78085cab8fbb48aa8b9f7e3e6d5a2694afd0ffe2e0johannkoenig@chromium.org b1 = ((ip[0] - ip[2]) * 4); 79474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 80474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[0] = a1 + d1 + (a1!=0); 81474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[1] = b1 + c1; 82474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[2] = b1 - c1; 83474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[3] = a1 - d1; 84474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ip += pitch / 2; 85474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op += 4; 86474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 87474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 88474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ip = output; 89474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op = output; 90474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 91474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org for (i = 0; i < 4; i++) 92474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org { 93474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org a1 = ip[0] + ip[8]; 94474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org d1 = ip[4] + ip[12]; 95474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org c1 = ip[4] - ip[12]; 96474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org b1 = ip[0] - ip[8]; 97474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 98474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org a2 = a1 + d1; 99474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org b2 = b1 + c1; 100474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org c2 = b1 - c1; 101474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org d2 = a1 - d1; 102474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 103474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org a2 += a2<0; 104474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org b2 += b2<0; 105474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org c2 += c2<0; 106474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org d2 += d2<0; 107474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 108474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[0] = (a2+3) >> 3; 109474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[4] = (b2+3) >> 3; 110474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[8] = (c2+3) >> 3; 111474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op[12]= (d2+3) >> 3; 112474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 113474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ip++; 114474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org op++; 115474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 116474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} 117