2 * Copyright (c) 2017 The WebM project authors. All Rights Reserved.
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.
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"
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 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,
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];
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);
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,
54 vpx_extend_frame_borders(dst);