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 "predictdc.h" 15 #include "idct.h" 16 #include "vpx_mem/vpx_mem.h" 17 18 extern void vp8_short_idct4x4llm_c(short *input, short *output, int pitch) ; 19 extern void vp8_short_idct4x4llm_1_c(short *input, short *output, int pitch); 20 21 22 void vp8_dequantize_b_c(BLOCKD *d) 23 { 24 int i; 25 short *DQ = d->dqcoeff; 26 short *Q = d->qcoeff; 27 short *DQC = d->dequant; 28 29 for (i = 0; i < 16; i++) 30 { 31 DQ[i] = Q[i] * DQC[i]; 32 } 33 } 34 35 void vp8_dequant_idct_add_c(short *input, short *dq, unsigned char *pred, 36 unsigned char *dest, int pitch, int stride) 37 { 38 short output[16]; 39 short *diff_ptr = output; 40 int r, c; 41 int i; 42 43 for (i = 0; i < 16; i++) 44 { 45 input[i] = dq[i] * input[i]; 46 } 47 48 /* the idct halves ( >> 1) the pitch */ 49 vp8_short_idct4x4llm_c(input, output, 4 << 1); 50 51 vpx_memset(input, 0, 32); 52 53 for (r = 0; r < 4; r++) 54 { 55 for (c = 0; c < 4; c++) 56 { 57 int a = diff_ptr[c] + pred[c]; 58 59 if (a < 0) 60 a = 0; 61 62 if (a > 255) 63 a = 255; 64 65 dest[c] = (unsigned char) a; 66 } 67 68 dest += stride; 69 diff_ptr += 4; 70 pred += pitch; 71 } 72 } 73 74 void vp8_dequant_dc_idct_add_c(short *input, short *dq, unsigned char *pred, 75 unsigned char *dest, int pitch, int stride, 76 int Dc) 77 { 78 int i; 79 short output[16]; 80 short *diff_ptr = output; 81 int r, c; 82 83 input[0] = (short)Dc; 84 85 for (i = 1; i < 16; i++) 86 { 87 input[i] = dq[i] * input[i]; 88 } 89 90 /* the idct halves ( >> 1) the pitch */ 91 vp8_short_idct4x4llm_c(input, output, 4 << 1); 92 93 vpx_memset(input, 0, 32); 94 95 for (r = 0; r < 4; r++) 96 { 97 for (c = 0; c < 4; c++) 98 { 99 int a = diff_ptr[c] + pred[c]; 100 101 if (a < 0) 102 a = 0; 103 104 if (a > 255) 105 a = 255; 106 107 dest[c] = (unsigned char) a; 108 } 109 110 dest += stride; 111 diff_ptr += 4; 112 pred += pitch; 113 } 114 } 115