1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vpx_scale/generic/yv12extend.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,181 @@
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 <assert.h>
1.15 +#include "./vpx_config.h"
1.16 +#include "vpx/vpx_integer.h"
1.17 +#include "vpx_mem/vpx_mem.h"
1.18 +#include "vpx_scale/yv12config.h"
1.19 +
1.20 +static void extend_plane(uint8_t *const src, int src_stride,
1.21 + int width, int height,
1.22 + int extend_top, int extend_left,
1.23 + int extend_bottom, int extend_right) {
1.24 + int i;
1.25 + const int linesize = extend_left + extend_right + width;
1.26 +
1.27 + /* copy the left and right most columns out */
1.28 + uint8_t *src_ptr1 = src;
1.29 + uint8_t *src_ptr2 = src + width - 1;
1.30 + uint8_t *dst_ptr1 = src - extend_left;
1.31 + uint8_t *dst_ptr2 = src + width;
1.32 +
1.33 + for (i = 0; i < height; ++i) {
1.34 + vpx_memset(dst_ptr1, src_ptr1[0], extend_left);
1.35 + vpx_memset(dst_ptr2, src_ptr2[0], extend_right);
1.36 + src_ptr1 += src_stride;
1.37 + src_ptr2 += src_stride;
1.38 + dst_ptr1 += src_stride;
1.39 + dst_ptr2 += src_stride;
1.40 + }
1.41 +
1.42 + /* Now copy the top and bottom lines into each line of the respective
1.43 + * borders
1.44 + */
1.45 + src_ptr1 = src - extend_left;
1.46 + src_ptr2 = src + src_stride * (height - 1) - extend_left;
1.47 + dst_ptr1 = src + src_stride * -extend_top - extend_left;
1.48 + dst_ptr2 = src + src_stride * height - extend_left;
1.49 +
1.50 + for (i = 0; i < extend_top; ++i) {
1.51 + vpx_memcpy(dst_ptr1, src_ptr1, linesize);
1.52 + dst_ptr1 += src_stride;
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 += src_stride;
1.58 + }
1.59 +}
1.60 +
1.61 +void vp8_yv12_extend_frame_borders_c(YV12_BUFFER_CONFIG *ybf) {
1.62 + assert(ybf->y_height - ybf->y_crop_height < 16);
1.63 + assert(ybf->y_width - ybf->y_crop_width < 16);
1.64 + assert(ybf->y_height - ybf->y_crop_height >= 0);
1.65 + assert(ybf->y_width - ybf->y_crop_width >= 0);
1.66 +
1.67 + extend_plane(ybf->y_buffer, ybf->y_stride,
1.68 + ybf->y_crop_width, ybf->y_crop_height,
1.69 + ybf->border, ybf->border,
1.70 + ybf->border + ybf->y_height - ybf->y_crop_height,
1.71 + ybf->border + ybf->y_width - ybf->y_crop_width);
1.72 +
1.73 + extend_plane(ybf->u_buffer, ybf->uv_stride,
1.74 + (ybf->y_crop_width + 1) / 2, (ybf->y_crop_height + 1) / 2,
1.75 + ybf->border / 2, ybf->border / 2,
1.76 + (ybf->border + ybf->y_height - ybf->y_crop_height + 1) / 2,
1.77 + (ybf->border + ybf->y_width - ybf->y_crop_width + 1) / 2);
1.78 +
1.79 + extend_plane(ybf->v_buffer, ybf->uv_stride,
1.80 + (ybf->y_crop_width + 1) / 2, (ybf->y_crop_height + 1) / 2,
1.81 + ybf->border / 2, ybf->border / 2,
1.82 + (ybf->border + ybf->y_height - ybf->y_crop_height + 1) / 2,
1.83 + (ybf->border + ybf->y_width - ybf->y_crop_width + 1) / 2);
1.84 +}
1.85 +
1.86 +#if CONFIG_VP9
1.87 +static void extend_frame(YV12_BUFFER_CONFIG *const ybf,
1.88 + int subsampling_x, int subsampling_y,
1.89 + int ext_size) {
1.90 + const int c_w = ybf->uv_crop_width;
1.91 + const int c_h = ybf->uv_crop_height;
1.92 + const int c_ext_size = ext_size >> 1;
1.93 + const int c_et = c_ext_size;
1.94 + const int c_el = c_ext_size;
1.95 + const int c_eb = c_ext_size + ybf->uv_height - ybf->uv_crop_height;
1.96 + const int c_er = c_ext_size + ybf->uv_width - ybf->uv_crop_width;
1.97 +
1.98 + assert(ybf->y_height - ybf->y_crop_height < 16);
1.99 + assert(ybf->y_width - ybf->y_crop_width < 16);
1.100 + assert(ybf->y_height - ybf->y_crop_height >= 0);
1.101 + assert(ybf->y_width - ybf->y_crop_width >= 0);
1.102 +
1.103 + extend_plane(ybf->y_buffer, ybf->y_stride,
1.104 + ybf->y_crop_width, ybf->y_crop_height,
1.105 + ext_size, ext_size,
1.106 + ext_size + ybf->y_height - ybf->y_crop_height,
1.107 + ext_size + ybf->y_width - ybf->y_crop_width);
1.108 +
1.109 + extend_plane(ybf->u_buffer, ybf->uv_stride,
1.110 + c_w, c_h, c_et, c_el, c_eb, c_er);
1.111 +
1.112 + extend_plane(ybf->v_buffer, ybf->uv_stride,
1.113 + c_w, c_h, c_et, c_el, c_eb, c_er);
1.114 +}
1.115 +
1.116 +void vp9_extend_frame_borders_c(YV12_BUFFER_CONFIG *ybf,
1.117 + int subsampling_x, int subsampling_y) {
1.118 + extend_frame(ybf, subsampling_x, subsampling_y, ybf->border);
1.119 +}
1.120 +
1.121 +void vp9_extend_frame_inner_borders_c(YV12_BUFFER_CONFIG *ybf,
1.122 + int subsampling_x, int subsampling_y) {
1.123 + const int inner_bw = (ybf->border > VP9INNERBORDERINPIXELS) ?
1.124 + VP9INNERBORDERINPIXELS : ybf->border;
1.125 + extend_frame(ybf, subsampling_x, subsampling_y, inner_bw);
1.126 +}
1.127 +#endif // CONFIG_VP9
1.128 +
1.129 +// Copies the source image into the destination image and updates the
1.130 +// destination's UMV borders.
1.131 +// Note: The frames are assumed to be identical in size.
1.132 +void vp8_yv12_copy_frame_c(const YV12_BUFFER_CONFIG *src_ybc,
1.133 + YV12_BUFFER_CONFIG *dst_ybc) {
1.134 + int row;
1.135 + const uint8_t *src = src_ybc->y_buffer;
1.136 + uint8_t *dst = dst_ybc->y_buffer;
1.137 +
1.138 +#if 0
1.139 + /* These assertions are valid in the codec, but the libvpx-tester uses
1.140 + * this code slightly differently.
1.141 + */
1.142 + assert(src_ybc->y_width == dst_ybc->y_width);
1.143 + assert(src_ybc->y_height == dst_ybc->y_height);
1.144 +#endif
1.145 +
1.146 + for (row = 0; row < src_ybc->y_height; ++row) {
1.147 + vpx_memcpy(dst, src, src_ybc->y_width);
1.148 + src += src_ybc->y_stride;
1.149 + dst += dst_ybc->y_stride;
1.150 + }
1.151 +
1.152 + src = src_ybc->u_buffer;
1.153 + dst = dst_ybc->u_buffer;
1.154 +
1.155 + for (row = 0; row < src_ybc->uv_height; ++row) {
1.156 + vpx_memcpy(dst, src, src_ybc->uv_width);
1.157 + src += src_ybc->uv_stride;
1.158 + dst += dst_ybc->uv_stride;
1.159 + }
1.160 +
1.161 + src = src_ybc->v_buffer;
1.162 + dst = dst_ybc->v_buffer;
1.163 +
1.164 + for (row = 0; row < src_ybc->uv_height; ++row) {
1.165 + vpx_memcpy(dst, src, src_ybc->uv_width);
1.166 + src += src_ybc->uv_stride;
1.167 + dst += dst_ybc->uv_stride;
1.168 + }
1.169 +
1.170 + vp8_yv12_extend_frame_borders_c(dst_ybc);
1.171 +}
1.172 +
1.173 +void vpx_yv12_copy_y_c(const YV12_BUFFER_CONFIG *src_ybc,
1.174 + YV12_BUFFER_CONFIG *dst_ybc) {
1.175 + int row;
1.176 + const uint8_t *src = src_ybc->y_buffer;
1.177 + uint8_t *dst = dst_ybc->y_buffer;
1.178 +
1.179 + for (row = 0; row < src_ybc->y_height; ++row) {
1.180 + vpx_memcpy(dst, src, src_ybc->y_width);
1.181 + src += src_ybc->y_stride;
1.182 + dst += dst_ybc->y_stride;
1.183 + }
1.184 +}
