2 * Copyright (c) 2010 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.
12 #include "./vpx_config.h"
13 #include "vpx/vpx_integer.h"
14 #include "vpx_mem/vpx_mem.h"
15 #include "vpx_scale/yv12config.h"
17 static void extend_plane(uint8_t *const src, int src_stride,
18 int width, int height,
19 int extend_top, int extend_left,
20 int extend_bottom, int extend_right) {
22 const int linesize = extend_left + extend_right + width;
24 /* copy the left and right most columns out */
25 uint8_t *src_ptr1 = src;
26 uint8_t *src_ptr2 = src + width - 1;
27 uint8_t *dst_ptr1 = src - extend_left;
28 uint8_t *dst_ptr2 = src + width;
30 for (i = 0; i < height; ++i) {
31 vpx_memset(dst_ptr1, src_ptr1[0], extend_left);
32 vpx_memset(dst_ptr2, src_ptr2[0], extend_right);
33 src_ptr1 += src_stride;
34 src_ptr2 += src_stride;
35 dst_ptr1 += src_stride;
36 dst_ptr2 += src_stride;
39 /* Now copy the top and bottom lines into each line of the respective
42 src_ptr1 = src - extend_left;
43 src_ptr2 = src + src_stride * (height - 1) - extend_left;
44 dst_ptr1 = src + src_stride * -extend_top - extend_left;
45 dst_ptr2 = src + src_stride * height - extend_left;
47 for (i = 0; i < extend_top; ++i) {
48 vpx_memcpy(dst_ptr1, src_ptr1, linesize);
49 dst_ptr1 += src_stride;
52 for (i = 0; i < extend_bottom; ++i) {
53 vpx_memcpy(dst_ptr2, src_ptr2, linesize);
54 dst_ptr2 += src_stride;
58 void vp8_yv12_extend_frame_borders_c(YV12_BUFFER_CONFIG *ybf) {
59 assert(ybf->y_height - ybf->y_crop_height < 16);
60 assert(ybf->y_width - ybf->y_crop_width < 16);
61 assert(ybf->y_height - ybf->y_crop_height >= 0);
62 assert(ybf->y_width - ybf->y_crop_width >= 0);
64 extend_plane(ybf->y_buffer, ybf->y_stride,
65 ybf->y_crop_width, ybf->y_crop_height,
66 ybf->border, ybf->border,
67 ybf->border + ybf->y_height - ybf->y_crop_height,
68 ybf->border + ybf->y_width - ybf->y_crop_width);
70 extend_plane(ybf->u_buffer, ybf->uv_stride,
71 (ybf->y_crop_width + 1) / 2, (ybf->y_crop_height + 1) / 2,
72 ybf->border / 2, ybf->border / 2,
73 (ybf->border + ybf->y_height - ybf->y_crop_height + 1) / 2,
74 (ybf->border + ybf->y_width - ybf->y_crop_width + 1) / 2);
76 extend_plane(ybf->v_buffer, ybf->uv_stride,
77 (ybf->y_crop_width + 1) / 2, (ybf->y_crop_height + 1) / 2,
78 ybf->border / 2, ybf->border / 2,
79 (ybf->border + ybf->y_height - ybf->y_crop_height + 1) / 2,
80 (ybf->border + ybf->y_width - ybf->y_crop_width + 1) / 2);
84 static void extend_frame(YV12_BUFFER_CONFIG *const ybf,
85 int subsampling_x, int subsampling_y,
87 const int c_w = (ybf->y_crop_width + subsampling_x) >> subsampling_x;
88 const int c_h = (ybf->y_crop_height + subsampling_y) >> subsampling_y;
89 const int c_et = ext_size >> subsampling_y;
90 const int c_el = ext_size >> subsampling_x;
91 const int c_eb = (ext_size + ybf->y_height - ybf->y_crop_height +
92 subsampling_y) >> subsampling_y;
93 const int c_er = (ext_size + ybf->y_width - ybf->y_crop_width +
94 subsampling_x) >> subsampling_x;
96 assert(ybf->y_height - ybf->y_crop_height < 16);
97 assert(ybf->y_width - ybf->y_crop_width < 16);
98 assert(ybf->y_height - ybf->y_crop_height >= 0);
99 assert(ybf->y_width - ybf->y_crop_width >= 0);
101 extend_plane(ybf->y_buffer, ybf->y_stride,
102 ybf->y_crop_width, ybf->y_crop_height,
104 ext_size + ybf->y_height - ybf->y_crop_height,
105 ext_size + ybf->y_width - ybf->y_crop_width);
107 extend_plane(ybf->u_buffer, ybf->uv_stride,
108 c_w, c_h, c_et, c_el, c_eb, c_er);
110 extend_plane(ybf->v_buffer, ybf->uv_stride,
111 c_w, c_h, c_et, c_el, c_eb, c_er);
114 void vp9_extend_frame_borders_c(YV12_BUFFER_CONFIG *ybf,
115 int subsampling_x, int subsampling_y) {
116 extend_frame(ybf, subsampling_x, subsampling_y, ybf->border);
119 void vp9_extend_frame_inner_borders_c(YV12_BUFFER_CONFIG *ybf,
120 int subsampling_x, int subsampling_y) {
121 const int inner_bw = (ybf->border > VP9INNERBORDERINPIXELS) ?
122 VP9INNERBORDERINPIXELS : ybf->border;
123 extend_frame(ybf, subsampling_x, subsampling_y, inner_bw);
127 // Copies the source image into the destination image and updates the
128 // destination's UMV borders.
129 // Note: The frames are assumed to be identical in size.
130 void vp8_yv12_copy_frame_c(const YV12_BUFFER_CONFIG *src_ybc,
131 YV12_BUFFER_CONFIG *dst_ybc) {
133 const uint8_t *src = src_ybc->y_buffer;
134 uint8_t *dst = dst_ybc->y_buffer;
137 /* These assertions are valid in the codec, but the libvpx-tester uses
138 * this code slightly differently.
140 assert(src_ybc->y_width == dst_ybc->y_width);
141 assert(src_ybc->y_height == dst_ybc->y_height);
144 for (row = 0; row < src_ybc->y_height; ++row) {
145 vpx_memcpy(dst, src, src_ybc->y_width);
146 src += src_ybc->y_stride;
147 dst += dst_ybc->y_stride;
150 src = src_ybc->u_buffer;
151 dst = dst_ybc->u_buffer;
153 for (row = 0; row < src_ybc->uv_height; ++row) {
154 vpx_memcpy(dst, src, src_ybc->uv_width);
155 src += src_ybc->uv_stride;
156 dst += dst_ybc->uv_stride;
159 src = src_ybc->v_buffer;
160 dst = dst_ybc->v_buffer;
162 for (row = 0; row < src_ybc->uv_height; ++row) {
163 vpx_memcpy(dst, src, src_ybc->uv_width);
164 src += src_ybc->uv_stride;
165 dst += dst_ybc->uv_stride;
168 vp8_yv12_extend_frame_borders_c(dst_ybc);
171 void vpx_yv12_copy_y_c(const YV12_BUFFER_CONFIG *src_ybc,
172 YV12_BUFFER_CONFIG *dst_ybc) {
174 const uint8_t *src = src_ybc->y_buffer;
175 uint8_t *dst = dst_ybc->y_buffer;
177 for (row = 0; row < src_ybc->y_height; ++row) {
178 vpx_memcpy(dst, src, src_ybc->y_width);
179 src += src_ybc->y_stride;
180 dst += dst_ybc->y_stride;