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