1 /*
2 * Copyright (c) 2010 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 "vpx_mem/vpx_mem.h"
12
13 #include "vp9/common/vp9_common.h"
14 #include "vp9/encoder/vp9_extend.h"
15
copy_and_extend_plane(const uint8_t * src,int src_pitch,uint8_t * dst,int dst_pitch,int w,int h,int extend_top,int extend_left,int extend_bottom,int extend_right)16 static void copy_and_extend_plane(const uint8_t *src, int src_pitch,
17 uint8_t *dst, int dst_pitch,
18 int w, int h,
19 int extend_top, int extend_left,
20 int extend_bottom, int extend_right) {
21 int i, linesize;
22
23 // copy the left and right most columns out
24 const uint8_t *src_ptr1 = src;
25 const uint8_t *src_ptr2 = src + w - 1;
26 uint8_t *dst_ptr1 = dst - extend_left;
27 uint8_t *dst_ptr2 = dst + w;
28
29 for (i = 0; i < h; i++) {
30 vpx_memset(dst_ptr1, src_ptr1[0], extend_left);
31 vpx_memcpy(dst_ptr1 + extend_left, src_ptr1, w);
32 vpx_memset(dst_ptr2, src_ptr2[0], extend_right);
33 src_ptr1 += src_pitch;
34 src_ptr2 += src_pitch;
35 dst_ptr1 += dst_pitch;
36 dst_ptr2 += dst_pitch;
37 }
38
39 // Now copy the top and bottom lines into each line of the respective
40 // borders
41 src_ptr1 = dst - extend_left;
42 src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
43 dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
44 dst_ptr2 = dst + dst_pitch * (h) - extend_left;
45 linesize = extend_left + extend_right + w;
46
47 for (i = 0; i < extend_top; i++) {
48 vpx_memcpy(dst_ptr1, src_ptr1, linesize);
49 dst_ptr1 += dst_pitch;
50 }
51
52 for (i = 0; i < extend_bottom; i++) {
53 vpx_memcpy(dst_ptr2, src_ptr2, linesize);
54 dst_ptr2 += dst_pitch;
55 }
56 }
57
vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG * src,YV12_BUFFER_CONFIG * dst)58 void vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG *src,
59 YV12_BUFFER_CONFIG *dst) {
60 // Extend src frame in buffer
61 // Altref filtering assumes 16 pixel extension
62 const int et_y = 16;
63 const int el_y = 16;
64 // Motion estimation may use src block variance with the block size up
65 // to 64x64, so the right and bottom need to be extended to 64 multiple
66 // or up to 16, whichever is greater.
67 const int eb_y = MAX(ALIGN_POWER_OF_TWO(src->y_width, 6) - src->y_width,
68 16);
69 const int er_y = MAX(ALIGN_POWER_OF_TWO(src->y_height, 6) - src->y_height,
70 16);
71 const int uv_width_subsampling = (src->uv_width != src->y_width);
72 const int uv_height_subsampling = (src->uv_height != src->y_height);
73 const int et_uv = et_y >> uv_height_subsampling;
74 const int el_uv = el_y >> uv_width_subsampling;
75 const int eb_uv = eb_y >> uv_height_subsampling;
76 const int er_uv = er_y >> uv_width_subsampling;
77
78 copy_and_extend_plane(src->y_buffer, src->y_stride,
79 dst->y_buffer, dst->y_stride,
80 src->y_width, src->y_height,
81 et_y, el_y, eb_y, er_y);
82
83 copy_and_extend_plane(src->u_buffer, src->uv_stride,
84 dst->u_buffer, dst->uv_stride,
85 src->uv_width, src->uv_height,
86 et_uv, el_uv, eb_uv, er_uv);
87
88 copy_and_extend_plane(src->v_buffer, src->uv_stride,
89 dst->v_buffer, dst->uv_stride,
90 src->uv_width, src->uv_height,
91 et_uv, el_uv, eb_uv, er_uv);
92 }
93
vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG * src,YV12_BUFFER_CONFIG * dst,int srcy,int srcx,int srch,int srcw)94 void vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG *src,
95 YV12_BUFFER_CONFIG *dst,
96 int srcy, int srcx,
97 int srch, int srcw) {
98 // If the side is not touching the bounder then don't extend.
99 const int et_y = srcy ? 0 : dst->border;
100 const int el_y = srcx ? 0 : dst->border;
101 const int eb_y = srcy + srch != src->y_height ? 0 :
102 dst->border + dst->y_height - src->y_height;
103 const int er_y = srcx + srcw != src->y_width ? 0 :
104 dst->border + dst->y_width - src->y_width;
105 const int src_y_offset = srcy * src->y_stride + srcx;
106 const int dst_y_offset = srcy * dst->y_stride + srcx;
107
108 const int et_uv = ROUND_POWER_OF_TWO(et_y, 1);
109 const int el_uv = ROUND_POWER_OF_TWO(el_y, 1);
110 const int eb_uv = ROUND_POWER_OF_TWO(eb_y, 1);
111 const int er_uv = ROUND_POWER_OF_TWO(er_y, 1);
112 const int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
113 const int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
114 const int srch_uv = ROUND_POWER_OF_TWO(srch, 1);
115 const int srcw_uv = ROUND_POWER_OF_TWO(srcw, 1);
116
117 copy_and_extend_plane(src->y_buffer + src_y_offset, src->y_stride,
118 dst->y_buffer + dst_y_offset, dst->y_stride,
119 srcw, srch,
120 et_y, el_y, eb_y, er_y);
121
122 copy_and_extend_plane(src->u_buffer + src_uv_offset, src->uv_stride,
123 dst->u_buffer + dst_uv_offset, dst->uv_stride,
124 srcw_uv, srch_uv,
125 et_uv, el_uv, eb_uv, er_uv);
126
127 copy_and_extend_plane(src->v_buffer + src_uv_offset, src->uv_stride,
128 dst->v_buffer + dst_uv_offset, dst->uv_stride,
129 srcw_uv, srch_uv,
130 et_uv, el_uv, eb_uv, er_uv);
131 }
132