1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vp9/common/vp9_extend.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,143 @@
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 +#include "vpx_mem/vpx_mem.h"
1.15 +
1.16 +#include "vp9/common/vp9_common.h"
1.17 +#include "vp9/common/vp9_extend.h"
1.18 +
1.19 +static void copy_and_extend_plane(const uint8_t *src, int src_pitch,
1.20 + uint8_t *dst, int dst_pitch,
1.21 + int w, int h,
1.22 + int extend_top, int extend_left,
1.23 + int extend_bottom, int extend_right) {
1.24 + int i, linesize;
1.25 +
1.26 + // copy the left and right most columns out
1.27 + const uint8_t *src_ptr1 = src;
1.28 + const uint8_t *src_ptr2 = src + w - 1;
1.29 + uint8_t *dst_ptr1 = dst - extend_left;
1.30 + uint8_t *dst_ptr2 = dst + w;
1.31 +
1.32 + for (i = 0; i < h; i++) {
1.33 + vpx_memset(dst_ptr1, src_ptr1[0], extend_left);
1.34 + vpx_memcpy(dst_ptr1 + extend_left, src_ptr1, w);
1.35 + vpx_memset(dst_ptr2, src_ptr2[0], extend_right);
1.36 + src_ptr1 += src_pitch;
1.37 + src_ptr2 += src_pitch;
1.38 + dst_ptr1 += dst_pitch;
1.39 + dst_ptr2 += dst_pitch;
1.40 + }
1.41 +
1.42 + // Now copy the top and bottom lines into each line of the respective
1.43 + // borders
1.44 + src_ptr1 = dst - extend_left;
1.45 + src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
1.46 + dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
1.47 + dst_ptr2 = dst + dst_pitch * (h) - extend_left;
1.48 + linesize = extend_left + extend_right + w;
1.49 +
1.50 + for (i = 0; i < extend_top; i++) {
1.51 + vpx_memcpy(dst_ptr1, src_ptr1, linesize);
1.52 + dst_ptr1 += dst_pitch;
1.53 + }
1.54 +
1.55 + for (i = 0; i < extend_bottom; i++) {
1.56 + vpx_memcpy(dst_ptr2, src_ptr2, linesize);
1.57 + dst_ptr2 += dst_pitch;
1.58 + }
1.59 +}
1.60 +
1.61 +void vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG *src,
1.62 + YV12_BUFFER_CONFIG *dst) {
1.63 + // Extend src frame in buffer
1.64 + // Altref filtering assumes 16 pixel extension
1.65 + const int et_y = 16;
1.66 + const int el_y = 16;
1.67 + // Motion estimation may use src block variance with the block size up
1.68 + // to 64x64, so the right and bottom need to be extended to 64 multiple
1.69 + // or up to 16, whichever is greater.
1.70 + const int eb_y = MAX(ALIGN_POWER_OF_TWO(src->y_width, 6) - src->y_width,
1.71 + 16);
1.72 + const int er_y = MAX(ALIGN_POWER_OF_TWO(src->y_height, 6) - src->y_height,
1.73 + 16);
1.74 + const int uv_width_subsampling = (src->uv_width != src->y_width);
1.75 + const int uv_height_subsampling = (src->uv_height != src->y_height);
1.76 + const int et_uv = et_y >> uv_height_subsampling;
1.77 + const int el_uv = el_y >> uv_width_subsampling;
1.78 + const int eb_uv = eb_y >> uv_height_subsampling;
1.79 + const int er_uv = er_y >> uv_width_subsampling;
1.80 +
1.81 +#if CONFIG_ALPHA
1.82 + const int et_a = dst->border >> (dst->alpha_height != dst->y_height);
1.83 + const int el_a = dst->border >> (dst->alpha_width != dst->y_width);
1.84 + const int eb_a = et_a + dst->alpha_height - src->alpha_height;
1.85 + const int er_a = el_a + dst->alpha_width - src->alpha_width;
1.86 +
1.87 + copy_and_extend_plane(src->alpha_buffer, src->alpha_stride,
1.88 + dst->alpha_buffer, dst->alpha_stride,
1.89 + src->alpha_width, src->alpha_height,
1.90 + et_a, el_a, eb_a, er_a);
1.91 +#endif
1.92 +
1.93 + copy_and_extend_plane(src->y_buffer, src->y_stride,
1.94 + dst->y_buffer, dst->y_stride,
1.95 + src->y_width, src->y_height,
1.96 + et_y, el_y, eb_y, er_y);
1.97 +
1.98 + copy_and_extend_plane(src->u_buffer, src->uv_stride,
1.99 + dst->u_buffer, dst->uv_stride,
1.100 + src->uv_width, src->uv_height,
1.101 + et_uv, el_uv, eb_uv, er_uv);
1.102 +
1.103 + copy_and_extend_plane(src->v_buffer, src->uv_stride,
1.104 + dst->v_buffer, dst->uv_stride,
1.105 + src->uv_width, src->uv_height,
1.106 + et_uv, el_uv, eb_uv, er_uv);
1.107 +}
1.108 +
1.109 +void vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG *src,
1.110 + YV12_BUFFER_CONFIG *dst,
1.111 + int srcy, int srcx,
1.112 + int srch, int srcw) {
1.113 + // If the side is not touching the bounder then don't extend.
1.114 + const int et_y = srcy ? 0 : dst->border;
1.115 + const int el_y = srcx ? 0 : dst->border;
1.116 + const int eb_y = srcy + srch != src->y_height ? 0 :
1.117 + dst->border + dst->y_height - src->y_height;
1.118 + const int er_y = srcx + srcw != src->y_width ? 0 :
1.119 + dst->border + dst->y_width - src->y_width;
1.120 + const int src_y_offset = srcy * src->y_stride + srcx;
1.121 + const int dst_y_offset = srcy * dst->y_stride + srcx;
1.122 +
1.123 + const int et_uv = ROUND_POWER_OF_TWO(et_y, 1);
1.124 + const int el_uv = ROUND_POWER_OF_TWO(el_y, 1);
1.125 + const int eb_uv = ROUND_POWER_OF_TWO(eb_y, 1);
1.126 + const int er_uv = ROUND_POWER_OF_TWO(er_y, 1);
1.127 + const int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
1.128 + const int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
1.129 + const int srch_uv = ROUND_POWER_OF_TWO(srch, 1);
1.130 + const int srcw_uv = ROUND_POWER_OF_TWO(srcw, 1);
1.131 +
1.132 + copy_and_extend_plane(src->y_buffer + src_y_offset, src->y_stride,
1.133 + dst->y_buffer + dst_y_offset, dst->y_stride,
1.134 + srcw, srch,
1.135 + et_y, el_y, eb_y, er_y);
1.136 +
1.137 + copy_and_extend_plane(src->u_buffer + src_uv_offset, src->uv_stride,
1.138 + dst->u_buffer + dst_uv_offset, dst->uv_stride,
1.139 + srcw_uv, srch_uv,
1.140 + et_uv, el_uv, eb_uv, er_uv);
1.141 +
1.142 + copy_and_extend_plane(src->v_buffer + src_uv_offset, src->uv_stride,
1.143 + dst->v_buffer + dst_uv_offset, dst->uv_stride,
1.144 + srcw_uv, srch_uv,
1.145 + et_uv, el_uv, eb_uv, er_uv);
1.146 +}
