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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_dsp/vpx_dsp_common.h"
12 #include "vpx_mem/vpx_mem.h"
13 #include "vpx_ports/mem.h"
14 
15 #include "vp9/common/vp9_common.h"
16 #include "vp9/encoder/vp9_extend.h"
17 
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)18 static void copy_and_extend_plane(const uint8_t *src, int src_pitch,
19                                   uint8_t *dst, int dst_pitch, int w, int h,
20                                   int extend_top, int extend_left,
21                                   int extend_bottom, int extend_right) {
22   int i, linesize;
23 
24   // copy the left and right most columns out
25   const uint8_t *src_ptr1 = src;
26   const uint8_t *src_ptr2 = src + w - 1;
27   uint8_t *dst_ptr1 = dst - extend_left;
28   uint8_t *dst_ptr2 = dst + w;
29 
30   for (i = 0; i < h; i++) {
31     memset(dst_ptr1, src_ptr1[0], extend_left);
32     memcpy(dst_ptr1 + extend_left, src_ptr1, w);
33     memset(dst_ptr2, src_ptr2[0], extend_right);
34     src_ptr1 += src_pitch;
35     src_ptr2 += src_pitch;
36     dst_ptr1 += dst_pitch;
37     dst_ptr2 += dst_pitch;
38   }
39 
40   // Now copy the top and bottom lines into each line of the respective
41   // borders
42   src_ptr1 = dst - extend_left;
43   src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
44   dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
45   dst_ptr2 = dst + dst_pitch * (h)-extend_left;
46   linesize = extend_left + extend_right + w;
47 
48   for (i = 0; i < extend_top; i++) {
49     memcpy(dst_ptr1, src_ptr1, linesize);
50     dst_ptr1 += dst_pitch;
51   }
52 
53   for (i = 0; i < extend_bottom; i++) {
54     memcpy(dst_ptr2, src_ptr2, linesize);
55     dst_ptr2 += dst_pitch;
56   }
57 }
58 
59 #if CONFIG_VP9_HIGHBITDEPTH
highbd_copy_and_extend_plane(const uint8_t * src8,int src_pitch,uint8_t * dst8,int dst_pitch,int w,int h,int extend_top,int extend_left,int extend_bottom,int extend_right)60 static void highbd_copy_and_extend_plane(const uint8_t *src8, int src_pitch,
61                                          uint8_t *dst8, int dst_pitch, int w,
62                                          int h, int extend_top, int extend_left,
63                                          int extend_bottom, int extend_right) {
64   int i, linesize;
65   uint16_t *src = CONVERT_TO_SHORTPTR(src8);
66   uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
67 
68   // copy the left and right most columns out
69   const uint16_t *src_ptr1 = src;
70   const uint16_t *src_ptr2 = src + w - 1;
71   uint16_t *dst_ptr1 = dst - extend_left;
72   uint16_t *dst_ptr2 = dst + w;
73 
74   for (i = 0; i < h; i++) {
75     vpx_memset16(dst_ptr1, src_ptr1[0], extend_left);
76     memcpy(dst_ptr1 + extend_left, src_ptr1, w * sizeof(src_ptr1[0]));
77     vpx_memset16(dst_ptr2, src_ptr2[0], extend_right);
78     src_ptr1 += src_pitch;
79     src_ptr2 += src_pitch;
80     dst_ptr1 += dst_pitch;
81     dst_ptr2 += dst_pitch;
82   }
83 
84   // Now copy the top and bottom lines into each line of the respective
85   // borders
86   src_ptr1 = dst - extend_left;
87   src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
88   dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
89   dst_ptr2 = dst + dst_pitch * (h)-extend_left;
90   linesize = extend_left + extend_right + w;
91 
92   for (i = 0; i < extend_top; i++) {
93     memcpy(dst_ptr1, src_ptr1, linesize * sizeof(src_ptr1[0]));
94     dst_ptr1 += dst_pitch;
95   }
96 
97   for (i = 0; i < extend_bottom; i++) {
98     memcpy(dst_ptr2, src_ptr2, linesize * sizeof(src_ptr2[0]));
99     dst_ptr2 += dst_pitch;
100   }
101 }
102 #endif  // CONFIG_VP9_HIGHBITDEPTH
103 
vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG * src,YV12_BUFFER_CONFIG * dst)104 void vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG *src,
105                                YV12_BUFFER_CONFIG *dst) {
106   // Extend src frame in buffer
107   // Altref filtering assumes 16 pixel extension
108   const int et_y = 16;
109   const int el_y = 16;
110   // Motion estimation may use src block variance with the block size up
111   // to 64x64, so the right and bottom need to be extended to 64 multiple
112   // or up to 16, whichever is greater.
113   const int er_y =
114       VPXMAX(src->y_width + 16, ALIGN_POWER_OF_TWO(src->y_width, 6)) -
115       src->y_crop_width;
116   const int eb_y =
117       VPXMAX(src->y_height + 16, ALIGN_POWER_OF_TWO(src->y_height, 6)) -
118       src->y_crop_height;
119   const int uv_width_subsampling = (src->uv_width != src->y_width);
120   const int uv_height_subsampling = (src->uv_height != src->y_height);
121   const int et_uv = et_y >> uv_height_subsampling;
122   const int el_uv = el_y >> uv_width_subsampling;
123   const int eb_uv = eb_y >> uv_height_subsampling;
124   const int er_uv = er_y >> uv_width_subsampling;
125 
126 #if CONFIG_VP9_HIGHBITDEPTH
127   if (src->flags & YV12_FLAG_HIGHBITDEPTH) {
128     highbd_copy_and_extend_plane(src->y_buffer, src->y_stride, dst->y_buffer,
129                                  dst->y_stride, src->y_crop_width,
130                                  src->y_crop_height, et_y, el_y, eb_y, er_y);
131 
132     highbd_copy_and_extend_plane(
133         src->u_buffer, src->uv_stride, dst->u_buffer, dst->uv_stride,
134         src->uv_crop_width, src->uv_crop_height, et_uv, el_uv, eb_uv, er_uv);
135 
136     highbd_copy_and_extend_plane(
137         src->v_buffer, src->uv_stride, dst->v_buffer, dst->uv_stride,
138         src->uv_crop_width, src->uv_crop_height, et_uv, el_uv, eb_uv, er_uv);
139     return;
140   }
141 #endif  // CONFIG_VP9_HIGHBITDEPTH
142 
143   copy_and_extend_plane(src->y_buffer, src->y_stride, dst->y_buffer,
144                         dst->y_stride, src->y_crop_width, src->y_crop_height,
145                         et_y, el_y, eb_y, er_y);
146 
147   copy_and_extend_plane(src->u_buffer, src->uv_stride, dst->u_buffer,
148                         dst->uv_stride, src->uv_crop_width, src->uv_crop_height,
149                         et_uv, el_uv, eb_uv, er_uv);
150 
151   copy_and_extend_plane(src->v_buffer, src->uv_stride, dst->v_buffer,
152                         dst->uv_stride, src->uv_crop_width, src->uv_crop_height,
153                         et_uv, el_uv, eb_uv, er_uv);
154 }
155 
vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG * src,YV12_BUFFER_CONFIG * dst,int srcy,int srcx,int srch,int srcw)156 void vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG *src,
157                                          YV12_BUFFER_CONFIG *dst, int srcy,
158                                          int srcx, int srch, int srcw) {
159   // If the side is not touching the bounder then don't extend.
160   const int et_y = srcy ? 0 : dst->border;
161   const int el_y = srcx ? 0 : dst->border;
162   const int eb_y = srcy + srch != src->y_height
163                        ? 0
164                        : dst->border + dst->y_height - src->y_height;
165   const int er_y = srcx + srcw != src->y_width
166                        ? 0
167                        : dst->border + dst->y_width - src->y_width;
168   const int src_y_offset = srcy * src->y_stride + srcx;
169   const int dst_y_offset = srcy * dst->y_stride + srcx;
170 
171   const int et_uv = ROUND_POWER_OF_TWO(et_y, 1);
172   const int el_uv = ROUND_POWER_OF_TWO(el_y, 1);
173   const int eb_uv = ROUND_POWER_OF_TWO(eb_y, 1);
174   const int er_uv = ROUND_POWER_OF_TWO(er_y, 1);
175   const int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
176   const int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
177   const int srch_uv = ROUND_POWER_OF_TWO(srch, 1);
178   const int srcw_uv = ROUND_POWER_OF_TWO(srcw, 1);
179 
180   copy_and_extend_plane(src->y_buffer + src_y_offset, src->y_stride,
181                         dst->y_buffer + dst_y_offset, dst->y_stride, srcw, srch,
182                         et_y, el_y, eb_y, er_y);
183 
184   copy_and_extend_plane(src->u_buffer + src_uv_offset, src->uv_stride,
185                         dst->u_buffer + dst_uv_offset, dst->uv_stride, srcw_uv,
186                         srch_uv, et_uv, el_uv, eb_uv, er_uv);
187 
188   copy_and_extend_plane(src->v_buffer + src_uv_offset, src->uv_stride,
189                         dst->v_buffer + dst_uv_offset, dst->uv_stride, srcw_uv,
190                         srch_uv, et_uv, el_uv, eb_uv, er_uv);
191 }
192