1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vp8/common/extend.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,188 @@
1.4 +/*
1.5 + * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +
1.15 +#include "extend.h"
1.16 +#include "vpx_mem/vpx_mem.h"
1.17 +
1.18 +
1.19 +static void copy_and_extend_plane
1.20 +(
1.21 + unsigned char *s, /* source */
1.22 + int sp, /* source pitch */
1.23 + unsigned char *d, /* destination */
1.24 + int dp, /* destination pitch */
1.25 + int h, /* height */
1.26 + int w, /* width */
1.27 + int et, /* extend top border */
1.28 + int el, /* extend left border */
1.29 + int eb, /* extend bottom border */
1.30 + int er /* extend right border */
1.31 +)
1.32 +{
1.33 + int i;
1.34 + unsigned char *src_ptr1, *src_ptr2;
1.35 + unsigned char *dest_ptr1, *dest_ptr2;
1.36 + int linesize;
1.37 +
1.38 + /* copy the left and right most columns out */
1.39 + src_ptr1 = s;
1.40 + src_ptr2 = s + w - 1;
1.41 + dest_ptr1 = d - el;
1.42 + dest_ptr2 = d + w;
1.43 +
1.44 + for (i = 0; i < h; i++)
1.45 + {
1.46 + vpx_memset(dest_ptr1, src_ptr1[0], el);
1.47 + vpx_memcpy(dest_ptr1 + el, src_ptr1, w);
1.48 + vpx_memset(dest_ptr2, src_ptr2[0], er);
1.49 + src_ptr1 += sp;
1.50 + src_ptr2 += sp;
1.51 + dest_ptr1 += dp;
1.52 + dest_ptr2 += dp;
1.53 + }
1.54 +
1.55 + /* Now copy the top and bottom lines into each line of the respective
1.56 + * borders
1.57 + */
1.58 + src_ptr1 = d - el;
1.59 + src_ptr2 = d + dp * (h - 1) - el;
1.60 + dest_ptr1 = d + dp * (-et) - el;
1.61 + dest_ptr2 = d + dp * (h) - el;
1.62 + linesize = el + er + w;
1.63 +
1.64 + for (i = 0; i < et; i++)
1.65 + {
1.66 + vpx_memcpy(dest_ptr1, src_ptr1, linesize);
1.67 + dest_ptr1 += dp;
1.68 + }
1.69 +
1.70 + for (i = 0; i < eb; i++)
1.71 + {
1.72 + vpx_memcpy(dest_ptr2, src_ptr2, linesize);
1.73 + dest_ptr2 += dp;
1.74 + }
1.75 +}
1.76 +
1.77 +
1.78 +void vp8_copy_and_extend_frame(YV12_BUFFER_CONFIG *src,
1.79 + YV12_BUFFER_CONFIG *dst)
1.80 +{
1.81 + int et = dst->border;
1.82 + int el = dst->border;
1.83 + int eb = dst->border + dst->y_height - src->y_height;
1.84 + int er = dst->border + dst->y_width - src->y_width;
1.85 +
1.86 + copy_and_extend_plane(src->y_buffer, src->y_stride,
1.87 + dst->y_buffer, dst->y_stride,
1.88 + src->y_height, src->y_width,
1.89 + et, el, eb, er);
1.90 +
1.91 + et = dst->border >> 1;
1.92 + el = dst->border >> 1;
1.93 + eb = (dst->border >> 1) + dst->uv_height - src->uv_height;
1.94 + er = (dst->border >> 1) + dst->uv_width - src->uv_width;
1.95 +
1.96 + copy_and_extend_plane(src->u_buffer, src->uv_stride,
1.97 + dst->u_buffer, dst->uv_stride,
1.98 + src->uv_height, src->uv_width,
1.99 + et, el, eb, er);
1.100 +
1.101 + copy_and_extend_plane(src->v_buffer, src->uv_stride,
1.102 + dst->v_buffer, dst->uv_stride,
1.103 + src->uv_height, src->uv_width,
1.104 + et, el, eb, er);
1.105 +}
1.106 +
1.107 +
1.108 +void vp8_copy_and_extend_frame_with_rect(YV12_BUFFER_CONFIG *src,
1.109 + YV12_BUFFER_CONFIG *dst,
1.110 + int srcy, int srcx,
1.111 + int srch, int srcw)
1.112 +{
1.113 + int et = dst->border;
1.114 + int el = dst->border;
1.115 + int eb = dst->border + dst->y_height - src->y_height;
1.116 + int er = dst->border + dst->y_width - src->y_width;
1.117 + int src_y_offset = srcy * src->y_stride + srcx;
1.118 + int dst_y_offset = srcy * dst->y_stride + srcx;
1.119 + int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
1.120 + int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
1.121 +
1.122 + /* If the side is not touching the bounder then don't extend. */
1.123 + if (srcy)
1.124 + et = 0;
1.125 + if (srcx)
1.126 + el = 0;
1.127 + if (srcy + srch != src->y_height)
1.128 + eb = 0;
1.129 + if (srcx + srcw != src->y_width)
1.130 + er = 0;
1.131 +
1.132 + copy_and_extend_plane(src->y_buffer + src_y_offset,
1.133 + src->y_stride,
1.134 + dst->y_buffer + dst_y_offset,
1.135 + dst->y_stride,
1.136 + srch, srcw,
1.137 + et, el, eb, er);
1.138 +
1.139 + et = (et + 1) >> 1;
1.140 + el = (el + 1) >> 1;
1.141 + eb = (eb + 1) >> 1;
1.142 + er = (er + 1) >> 1;
1.143 + srch = (srch + 1) >> 1;
1.144 + srcw = (srcw + 1) >> 1;
1.145 +
1.146 + copy_and_extend_plane(src->u_buffer + src_uv_offset,
1.147 + src->uv_stride,
1.148 + dst->u_buffer + dst_uv_offset,
1.149 + dst->uv_stride,
1.150 + srch, srcw,
1.151 + et, el, eb, er);
1.152 +
1.153 + copy_and_extend_plane(src->v_buffer + src_uv_offset,
1.154 + src->uv_stride,
1.155 + dst->v_buffer + dst_uv_offset,
1.156 + dst->uv_stride,
1.157 + srch, srcw,
1.158 + et, el, eb, er);
1.159 +}
1.160 +
1.161 +
1.162 +/* note the extension is only for the last row, for intra prediction purpose */
1.163 +void vp8_extend_mb_row(YV12_BUFFER_CONFIG *ybf,
1.164 + unsigned char *YPtr,
1.165 + unsigned char *UPtr,
1.166 + unsigned char *VPtr)
1.167 +{
1.168 + int i;
1.169 +
1.170 + YPtr += ybf->y_stride * 14;
1.171 + UPtr += ybf->uv_stride * 6;
1.172 + VPtr += ybf->uv_stride * 6;
1.173 +
1.174 + for (i = 0; i < 4; i++)
1.175 + {
1.176 + YPtr[i] = YPtr[-1];
1.177 + UPtr[i] = UPtr[-1];
1.178 + VPtr[i] = VPtr[-1];
1.179 + }
1.180 +
1.181 + YPtr += ybf->y_stride;
1.182 + UPtr += ybf->uv_stride;
1.183 + VPtr += ybf->uv_stride;
1.184 +
1.185 + for (i = 0; i < 4; i++)
1.186 + {
1.187 + YPtr[i] = YPtr[-1];
1.188 + UPtr[i] = UPtr[-1];
1.189 + VPtr[i] = VPtr[-1];
1.190 + }
1.191 +}
