1 /* 2 * Copyright (c) 2017 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 "./vp9_rtcd.h" 12 #include "./vpx_dsp_rtcd.h" 13 #include "./vpx_scale_rtcd.h" 14 #include "vp9/common/vp9_blockd.h" 15 #include "vpx_dsp/vpx_filter.h" 16 #include "vpx_scale/yv12config.h" 17 18 void vp9_scale_and_extend_frame_c(const YV12_BUFFER_CONFIG *src, 19 YV12_BUFFER_CONFIG *dst, 20 INTERP_FILTER filter_type, int phase_scaler) { 21 const int src_w = src->y_crop_width; 22 const int src_h = src->y_crop_height; 23 const uint8_t *const srcs[3] = { src->y_buffer, src->u_buffer, 24 src->v_buffer }; 25 const int src_strides[3] = { src->y_stride, src->uv_stride, src->uv_stride }; 26 uint8_t *const dsts[3] = { dst->y_buffer, dst->u_buffer, dst->v_buffer }; 27 const int dst_strides[3] = { dst->y_stride, dst->uv_stride, dst->uv_stride }; 28 const InterpKernel *const kernel = vp9_filter_kernels[filter_type]; 29 int x, y, i; 30 31 #if HAVE_SSSE3 || HAVE_NEON 32 // TODO(linfengz): The 4:3 specialized C code is disabled by default since 33 // it's much slower than the general version which calls vpx_scaled_2d() even 34 // if vpx_scaled_2d() is not optimized. It will only be enabled as a reference 35 // for the platforms which have faster optimization. 36 if (4 * dst->y_crop_width == 3 * src_w && 37 4 * dst->y_crop_height == 3 * src_h) { 38 // Specialize 4 to 3 scaling. 39 // Example pixel locations. 40 // (O: Original pixel. S: Scaled pixel. X: Overlapped pixel.) 41 // phase_scaler = 0 | phase_scaler = 8 42 // | 43 // X O S O S O X | O O O O O 44 // | 45 // | 46 // | S S S 47 // | 48 // | 49 // O O O O O | O O O O O 50 // | 51 // S S S S | 52 // | 53 // | 54 // | S S S 55 // O O O O O | O O O O O 56 // | 57 // | 58 // | 59 // S S S S | 60 // | 61 // O O O O O | O O O O O 62 // | S S S 63 // | 64 // | 65 // | 66 // | 67 // X O S O S O X | O O O O O 68 69 const int dst_ws[3] = { dst->y_crop_width, dst->uv_crop_width, 70 dst->uv_crop_width }; 71 const int dst_hs[3] = { dst->y_crop_height, dst->uv_crop_height, 72 dst->uv_crop_height }; 73 for (i = 0; i < MAX_MB_PLANE; ++i) { 74 const int dst_w = dst_ws[i]; 75 const int dst_h = dst_hs[i]; 76 const int src_stride = src_strides[i]; 77 const int dst_stride = dst_strides[i]; 78 for (y = 0; y < dst_h; y += 3) { 79 for (x = 0; x < dst_w; x += 3) { 80 const uint8_t *src_ptr = srcs[i] + 4 * y / 3 * src_stride + 4 * x / 3; 81 uint8_t *dst_ptr = dsts[i] + y * dst_stride + x; 82 83 // Must call c function because its optimization doesn't support 3x3. 84 vpx_scaled_2d_c(src_ptr, src_stride, dst_ptr, dst_stride, kernel, 85 phase_scaler, 64 / 3, phase_scaler, 64 / 3, 3, 3); 86 } 87 } 88 } 89 } else 90 #endif 91 { 92 const int dst_w = dst->y_crop_width; 93 const int dst_h = dst->y_crop_height; 94 for (i = 0; i < MAX_MB_PLANE; ++i) { 95 const int factor = (i == 0 || i == 3 ? 1 : 2); 96 const int src_stride = src_strides[i]; 97 const int dst_stride = dst_strides[i]; 98 for (y = 0; y < dst_h; y += 16) { 99 const int y_q4 = y * (16 / factor) * src_h / dst_h + phase_scaler; 100 for (x = 0; x < dst_w; x += 16) { 101 const int x_q4 = x * (16 / factor) * src_w / dst_w + phase_scaler; 102 const uint8_t *src_ptr = srcs[i] + 103 (y / factor) * src_h / dst_h * src_stride + 104 (x / factor) * src_w / dst_w; 105 uint8_t *dst_ptr = dsts[i] + (y / factor) * dst_stride + (x / factor); 106 107 vpx_scaled_2d(src_ptr, src_stride, dst_ptr, dst_stride, kernel, 108 x_q4 & 0xf, 16 * src_w / dst_w, y_q4 & 0xf, 109 16 * src_h / dst_h, 16 / factor, 16 / factor); 110 } 111 } 112 } 113 } 114 115 vpx_extend_frame_borders(dst); 116 } 117
