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.
13 #include "vpx_mem/vpx_mem.h"
16 static void copy_and_extend_plane
18 unsigned char *s, /* source */
19 int sp, /* source pitch */
20 unsigned char *d, /* destination */
21 int dp, /* destination pitch */
24 int et, /* extend top border */
25 int el, /* extend left border */
26 int eb, /* extend bottom border */
27 int er /* extend right border */
31 unsigned char *src_ptr1, *src_ptr2;
32 unsigned char *dest_ptr1, *dest_ptr2;
35 /* copy the left and right most columns out */
41 for (i = 0; i < h; i++)
43 vpx_memset(dest_ptr1, src_ptr1[0], el);
44 vpx_memcpy(dest_ptr1 + el, src_ptr1, w);
45 vpx_memset(dest_ptr2, src_ptr2[0], er);
52 /* Now copy the top and bottom lines into each line of the respective
56 src_ptr2 = d + dp * (h - 1) - el;
57 dest_ptr1 = d + dp * (-et) - el;
58 dest_ptr2 = d + dp * (h) - el;
59 linesize = el + er + w;
61 for (i = 0; i < et; i++)
63 vpx_memcpy(dest_ptr1, src_ptr1, linesize);
67 for (i = 0; i < eb; i++)
69 vpx_memcpy(dest_ptr2, src_ptr2, linesize);
75 void vp8_copy_and_extend_frame(YV12_BUFFER_CONFIG *src,
76 YV12_BUFFER_CONFIG *dst)
80 int eb = dst->border + dst->y_height - src->y_height;
81 int er = dst->border + dst->y_width - src->y_width;
83 copy_and_extend_plane(src->y_buffer, src->y_stride,
84 dst->y_buffer, dst->y_stride,
85 src->y_height, src->y_width,
88 et = dst->border >> 1;
89 el = dst->border >> 1;
90 eb = (dst->border >> 1) + dst->uv_height - src->uv_height;
91 er = (dst->border >> 1) + dst->uv_width - src->uv_width;
93 copy_and_extend_plane(src->u_buffer, src->uv_stride,
94 dst->u_buffer, dst->uv_stride,
95 src->uv_height, src->uv_width,
98 copy_and_extend_plane(src->v_buffer, src->uv_stride,
99 dst->v_buffer, dst->uv_stride,
100 src->uv_height, src->uv_width,
105 void vp8_copy_and_extend_frame_with_rect(YV12_BUFFER_CONFIG *src,
106 YV12_BUFFER_CONFIG *dst,
110 int et = dst->border;
111 int el = dst->border;
112 int eb = dst->border + dst->y_height - src->y_height;
113 int er = dst->border + dst->y_width - src->y_width;
114 int src_y_offset = srcy * src->y_stride + srcx;
115 int dst_y_offset = srcy * dst->y_stride + srcx;
116 int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
117 int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
119 // If the side is not touching the bounder then don't extend.
124 if (srcy + srch != src->y_height)
126 if (srcx + srcw != src->y_width)
129 copy_and_extend_plane(src->y_buffer + src_y_offset,
131 dst->y_buffer + dst_y_offset,
140 srch = (srch + 1) >> 1;
141 srcw = (srcw + 1) >> 1;
143 copy_and_extend_plane(src->u_buffer + src_uv_offset,
145 dst->u_buffer + dst_uv_offset,
150 copy_and_extend_plane(src->v_buffer + src_uv_offset,
152 dst->v_buffer + dst_uv_offset,
159 /* note the extension is only for the last row, for intra prediction purpose */
160 void vp8_extend_mb_row(YV12_BUFFER_CONFIG *ybf, unsigned char *YPtr, unsigned char *UPtr, unsigned char *VPtr)
164 YPtr += ybf->y_stride * 14;
165 UPtr += ybf->uv_stride * 6;
166 VPtr += ybf->uv_stride * 6;
168 for (i = 0; i < 4; i++)
175 YPtr += ybf->y_stride;
176 UPtr += ybf->uv_stride;
177 VPtr += ybf->uv_stride;
179 for (i = 0; i < 4; i++)