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 #include <string.h> 12 13 #include "vpx_config.h" 14 #include "./vpx_dsp_rtcd.h" 15 #include "vp8_rtcd.h" 16 #include "blockd.h" 17 #include "reconintra4x4.h" 18 #include "vp8/common/common.h" 19 #include "vpx_ports/mem.h" 20 21 typedef void (*intra_pred_fn)(uint8_t *dst, ptrdiff_t stride, 22 const uint8_t *above, const uint8_t *left); 23 24 static intra_pred_fn pred[10]; 25 26 void vp8_init_intra4x4_predictors_internal(void) { 27 pred[B_DC_PRED] = vpx_dc_predictor_4x4; 28 pred[B_TM_PRED] = vpx_tm_predictor_4x4; 29 pred[B_VE_PRED] = vpx_ve_predictor_4x4; 30 pred[B_HE_PRED] = vpx_he_predictor_4x4; 31 pred[B_LD_PRED] = vpx_d45e_predictor_4x4; 32 pred[B_RD_PRED] = vpx_d135_predictor_4x4; 33 pred[B_VR_PRED] = vpx_d117_predictor_4x4; 34 pred[B_VL_PRED] = vpx_d63e_predictor_4x4; 35 pred[B_HD_PRED] = vpx_d153_predictor_4x4; 36 pred[B_HU_PRED] = vpx_d207_predictor_4x4; 37 } 38 39 void vp8_intra4x4_predict(unsigned char *above, unsigned char *yleft, 40 int left_stride, B_PREDICTION_MODE b_mode, 41 unsigned char *dst, int dst_stride, 42 unsigned char top_left) { 43 /* Power PC implementation uses "vec_vsx_ld" to read 16 bytes from 44 Above (aka, Aboveb + 4). Play it safe by reserving enough stack 45 space here. Similary for "Left". */ 46 #if HAVE_VSX 47 unsigned char Aboveb[20]; 48 #else 49 unsigned char Aboveb[12]; 50 #endif 51 unsigned char *Above = Aboveb + 4; 52 #if HAVE_NEON 53 // Neon intrinsics are unable to load 32 bits, or 4 8 bit values. Instead, it 54 // over reads but does not use the extra 4 values. 55 unsigned char Left[8]; 56 #if VPX_WITH_ASAN 57 // Silence an 'uninitialized read' warning. Although uninitialized values are 58 // indeed read, they are not used. 59 vp8_zero_array(Left, 8); 60 #endif // VPX_WITH_ASAN 61 #elif HAVE_VSX 62 unsigned char Left[16]; 63 #else 64 unsigned char Left[4]; 65 #endif // HAVE_NEON 66 67 Left[0] = yleft[0]; 68 Left[1] = yleft[left_stride]; 69 Left[2] = yleft[2 * left_stride]; 70 Left[3] = yleft[3 * left_stride]; 71 memcpy(Above, above, 8); 72 Above[-1] = top_left; 73 74 pred[b_mode](dst, dst_stride, Above, Left); 75 } 76
