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 18void 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 int dst_w = dst->y_crop_width; 24 const int dst_h = dst->y_crop_height; 25 const uint8_t *const srcs[3] = { src->y_buffer, src->u_buffer, 26 src->v_buffer }; 27 const int src_strides[3] = { src->y_stride, src->uv_stride, src->uv_stride }; 28 uint8_t *const dsts[3] = { dst->y_buffer, dst->u_buffer, dst->v_buffer }; 29 const int dst_strides[3] = { dst->y_stride, dst->uv_stride, dst->uv_stride }; 30 const InterpKernel *const kernel = vp9_filter_kernels[filter_type]; 31 int x, y, i; 32 33 for (i = 0; i < MAX_MB_PLANE; ++i) { 34 const int factor = (i == 0 || i == 3 ? 1 : 2); 35 const int src_stride = src_strides[i]; 36 const int dst_stride = dst_strides[i]; 37 for (y = 0; y < dst_h; y += 16) { 38 const int y_q4 = y * (16 / factor) * src_h / dst_h + phase_scaler; 39 for (x = 0; x < dst_w; x += 16) { 40 const int x_q4 = x * (16 / factor) * src_w / dst_w + phase_scaler; 41 const uint8_t *src_ptr = srcs[i] + 42 (y / factor) * src_h / dst_h * src_stride + 43 (x / factor) * src_w / dst_w; 44 uint8_t *dst_ptr = dsts[i] + (y / factor) * dst_stride + (x / factor); 45 46 vpx_scaled_2d(src_ptr, src_stride, dst_ptr, dst_stride, 47 kernel[x_q4 & 0xf], 16 * src_w / dst_w, 48 kernel[y_q4 & 0xf], 16 * src_h / dst_h, 16 / factor, 49 16 / factor); 50 } 51 } 52 } 53 54 vpx_extend_frame_borders(dst); 55} 56