(61d00a474) v0.9.7.1
This commit is contained in:
Regalis
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/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "extend.h"
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#include "vpx_mem/vpx_mem.h"
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static void copy_and_extend_plane(unsigned char *s, /* source */
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int sp, /* source pitch */
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unsigned char *d, /* destination */
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int dp, /* destination pitch */
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int h, /* height */
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int w, /* width */
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int et, /* extend top border */
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int el, /* extend left border */
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int eb, /* extend bottom border */
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int er) { /* extend right border */
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int i;
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unsigned char *src_ptr1, *src_ptr2;
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unsigned char *dest_ptr1, *dest_ptr2;
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int linesize;
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/* copy the left and right most columns out */
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src_ptr1 = s;
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src_ptr2 = s + w - 1;
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dest_ptr1 = d - el;
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dest_ptr2 = d + w;
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for (i = 0; i < h; ++i) {
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memset(dest_ptr1, src_ptr1[0], el);
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memcpy(dest_ptr1 + el, src_ptr1, w);
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memset(dest_ptr2, src_ptr2[0], er);
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src_ptr1 += sp;
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src_ptr2 += sp;
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dest_ptr1 += dp;
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dest_ptr2 += dp;
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}
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/* Now copy the top and bottom lines into each line of the respective
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* borders
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*/
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src_ptr1 = d - el;
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src_ptr2 = d + dp * (h - 1) - el;
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dest_ptr1 = d + dp * (-et) - el;
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dest_ptr2 = d + dp * (h)-el;
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linesize = el + er + w;
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for (i = 0; i < et; ++i) {
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memcpy(dest_ptr1, src_ptr1, linesize);
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dest_ptr1 += dp;
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}
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for (i = 0; i < eb; ++i) {
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memcpy(dest_ptr2, src_ptr2, linesize);
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dest_ptr2 += dp;
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}
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}
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void vp8_copy_and_extend_frame(YV12_BUFFER_CONFIG *src,
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YV12_BUFFER_CONFIG *dst) {
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int et = dst->border;
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int el = dst->border;
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int eb = dst->border + dst->y_height - src->y_height;
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int er = dst->border + dst->y_width - src->y_width;
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copy_and_extend_plane(src->y_buffer, src->y_stride, dst->y_buffer,
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dst->y_stride, src->y_height, src->y_width, et, el, eb,
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er);
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et = dst->border >> 1;
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el = dst->border >> 1;
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eb = (dst->border >> 1) + dst->uv_height - src->uv_height;
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er = (dst->border >> 1) + dst->uv_width - src->uv_width;
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copy_and_extend_plane(src->u_buffer, src->uv_stride, dst->u_buffer,
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dst->uv_stride, src->uv_height, src->uv_width, et, el,
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eb, er);
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copy_and_extend_plane(src->v_buffer, src->uv_stride, dst->v_buffer,
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dst->uv_stride, src->uv_height, src->uv_width, et, el,
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eb, er);
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}
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void vp8_copy_and_extend_frame_with_rect(YV12_BUFFER_CONFIG *src,
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YV12_BUFFER_CONFIG *dst, int srcy,
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int srcx, int srch, int srcw) {
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int et = dst->border;
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int el = dst->border;
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int eb = dst->border + dst->y_height - src->y_height;
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int er = dst->border + dst->y_width - src->y_width;
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int src_y_offset = srcy * src->y_stride + srcx;
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int dst_y_offset = srcy * dst->y_stride + srcx;
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int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
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int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
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/* If the side is not touching the bounder then don't extend. */
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if (srcy) et = 0;
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if (srcx) el = 0;
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if (srcy + srch != src->y_height) eb = 0;
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if (srcx + srcw != src->y_width) er = 0;
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copy_and_extend_plane(src->y_buffer + src_y_offset, src->y_stride,
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dst->y_buffer + dst_y_offset, dst->y_stride, srch, srcw,
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et, el, eb, er);
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et = (et + 1) >> 1;
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el = (el + 1) >> 1;
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eb = (eb + 1) >> 1;
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er = (er + 1) >> 1;
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srch = (srch + 1) >> 1;
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srcw = (srcw + 1) >> 1;
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copy_and_extend_plane(src->u_buffer + src_uv_offset, src->uv_stride,
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dst->u_buffer + dst_uv_offset, dst->uv_stride, srch,
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srcw, et, el, eb, er);
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copy_and_extend_plane(src->v_buffer + src_uv_offset, src->uv_stride,
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dst->v_buffer + dst_uv_offset, dst->uv_stride, srch,
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srcw, et, el, eb, er);
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}
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/* note the extension is only for the last row, for intra prediction purpose */
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void vp8_extend_mb_row(YV12_BUFFER_CONFIG *ybf, unsigned char *YPtr,
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unsigned char *UPtr, unsigned char *VPtr) {
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int i;
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YPtr += ybf->y_stride * 14;
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UPtr += ybf->uv_stride * 6;
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VPtr += ybf->uv_stride * 6;
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for (i = 0; i < 4; ++i) {
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YPtr[i] = YPtr[-1];
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UPtr[i] = UPtr[-1];
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VPtr[i] = VPtr[-1];
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}
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YPtr += ybf->y_stride;
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UPtr += ybf->uv_stride;
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VPtr += ybf->uv_stride;
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for (i = 0; i < 4; ++i) {
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YPtr[i] = YPtr[-1];
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UPtr[i] = UPtr[-1];
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VPtr[i] = VPtr[-1];
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}
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}
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