1 /* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 12 #include "vpx_ports/config.h" 13 #include "dequantize.h" 14 #include "vp8/common/idct.h" 15 #include "vpx_mem/vpx_mem.h" 16 17 extern void vp8_short_idct4x4llm_c(short *input, short *output, int pitch) ; 18 extern void vp8_short_idct4x4llm_1_c(short *input, short *output, int pitch); 19 20 21 void vp8_dequantize_b_c(BLOCKD *d) 22 { 23 int i; 24 short *DQ = d->dqcoeff; 25 short *Q = d->qcoeff; 26 short *DQC = d->dequant; 27 28 for (i = 0; i < 16; i++) 29 { 30 DQ[i] = Q[i] * DQC[i]; 31 } 32 } 33 34 void vp8_dequant_idct_add_c(short *input, short *dq, unsigned char *pred, 35 unsigned char *dest, int pitch, int stride) 36 { 37 short output[16]; 38 short *diff_ptr = output; 39 int r, c; 40 int i; 41 42 for (i = 0; i < 16; i++) 43 { 44 input[i] = dq[i] * input[i]; 45 } 46 47 /* the idct halves ( >> 1) the pitch */ 48 vp8_short_idct4x4llm_c(input, output, 4 << 1); 49 50 vpx_memset(input, 0, 32); 51 52 for (r = 0; r < 4; r++) 53 { 54 for (c = 0; c < 4; c++) 55 { 56 int a = diff_ptr[c] + pred[c]; 57 58 if (a < 0) 59 a = 0; 60 61 if (a > 255) 62 a = 255; 63 64 dest[c] = (unsigned char) a; 65 } 66 67 dest += stride; 68 diff_ptr += 4; 69 pred += pitch; 70 } 71 } 72 73 void vp8_dequant_dc_idct_add_c(short *input, short *dq, unsigned char *pred, 74 unsigned char *dest, int pitch, int stride, 75 int Dc) 76 { 77 int i; 78 short output[16]; 79 short *diff_ptr = output; 80 int r, c; 81 82 input[0] = (short)Dc; 83 84 for (i = 1; i < 16; i++) 85 { 86 input[i] = dq[i] * input[i]; 87 } 88 89 /* the idct halves ( >> 1) the pitch */ 90 vp8_short_idct4x4llm_c(input, output, 4 << 1); 91 92 vpx_memset(input, 0, 32); 93 94 for (r = 0; r < 4; r++) 95 { 96 for (c = 0; c < 4; c++) 97 { 98 int a = diff_ptr[c] + pred[c]; 99 100 if (a < 0) 101 a = 0; 102 103 if (a > 255) 104 a = 255; 105 106 dest[c] = (unsigned char) a; 107 } 108 109 dest += stride; 110 diff_ptr += 4; 111 pred += pitch; 112 } 113 } 114
