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: #include "vpx_mem/vpx_mem.h"
michael@0: 
michael@0: #include "vp9/common/vp9_common.h"
michael@0: #include "vp9/common/vp9_extend.h"
michael@0: 
michael@0: static void copy_and_extend_plane(const uint8_t *src, int src_pitch,
michael@0:                                   uint8_t *dst, int dst_pitch,
michael@0:                                   int w, int h,
michael@0:                                   int extend_top, int extend_left,
michael@0:                                   int extend_bottom, int extend_right) {
michael@0:   int i, linesize;
michael@0: 
michael@0:   // copy the left and right most columns out
michael@0:   const uint8_t *src_ptr1 = src;
michael@0:   const uint8_t *src_ptr2 = src + w - 1;
michael@0:   uint8_t *dst_ptr1 = dst - extend_left;
michael@0:   uint8_t *dst_ptr2 = dst + w;
michael@0: 
michael@0:   for (i = 0; i < h; i++) {
michael@0:     vpx_memset(dst_ptr1, src_ptr1[0], extend_left);
michael@0:     vpx_memcpy(dst_ptr1 + extend_left, src_ptr1, w);
michael@0:     vpx_memset(dst_ptr2, src_ptr2[0], extend_right);
michael@0:     src_ptr1 += src_pitch;
michael@0:     src_ptr2 += src_pitch;
michael@0:     dst_ptr1 += dst_pitch;
michael@0:     dst_ptr2 += dst_pitch;
michael@0:   }
michael@0: 
michael@0:   // Now copy the top and bottom lines into each line of the respective
michael@0:   // borders
michael@0:   src_ptr1 = dst - extend_left;
michael@0:   src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
michael@0:   dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
michael@0:   dst_ptr2 = dst + dst_pitch * (h) - extend_left;
michael@0:   linesize = extend_left + extend_right + w;
michael@0: 
michael@0:   for (i = 0; i < extend_top; i++) {
michael@0:     vpx_memcpy(dst_ptr1, src_ptr1, linesize);
michael@0:     dst_ptr1 += dst_pitch;
michael@0:   }
michael@0: 
michael@0:   for (i = 0; i < extend_bottom; i++) {
michael@0:     vpx_memcpy(dst_ptr2, src_ptr2, linesize);
michael@0:     dst_ptr2 += dst_pitch;
michael@0:   }
michael@0: }
michael@0: 
michael@0: void vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG *src,
michael@0:                                YV12_BUFFER_CONFIG *dst) {
michael@0:   // Extend src frame in buffer
michael@0:   // Altref filtering assumes 16 pixel extension
michael@0:   const int et_y = 16;
michael@0:   const int el_y = 16;
michael@0:   // Motion estimation may use src block variance with the block size up
michael@0:   // to 64x64, so the right and bottom need to be extended to 64 multiple
michael@0:   // or up to 16, whichever is greater.
michael@0:   const int eb_y = MAX(ALIGN_POWER_OF_TWO(src->y_width, 6) - src->y_width,
michael@0:                        16);
michael@0:   const int er_y = MAX(ALIGN_POWER_OF_TWO(src->y_height, 6) - src->y_height,
michael@0:                        16);
michael@0:   const int uv_width_subsampling = (src->uv_width != src->y_width);
michael@0:   const int uv_height_subsampling = (src->uv_height != src->y_height);
michael@0:   const int et_uv = et_y >> uv_height_subsampling;
michael@0:   const int el_uv = el_y >> uv_width_subsampling;
michael@0:   const int eb_uv = eb_y >> uv_height_subsampling;
michael@0:   const int er_uv = er_y >> uv_width_subsampling;
michael@0: 
michael@0: #if CONFIG_ALPHA
michael@0:   const int et_a = dst->border >> (dst->alpha_height != dst->y_height);
michael@0:   const int el_a = dst->border >> (dst->alpha_width != dst->y_width);
michael@0:   const int eb_a = et_a + dst->alpha_height - src->alpha_height;
michael@0:   const int er_a = el_a + dst->alpha_width - src->alpha_width;
michael@0: 
michael@0:   copy_and_extend_plane(src->alpha_buffer, src->alpha_stride,
michael@0:                         dst->alpha_buffer, dst->alpha_stride,
michael@0:                         src->alpha_width, src->alpha_height,
michael@0:                         et_a, el_a, eb_a, er_a);
michael@0: #endif
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_width, src->y_height,
michael@0:                         et_y, el_y, eb_y, er_y);
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_width, src->uv_height,
michael@0:                         et_uv, el_uv, eb_uv, er_uv);
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_width, src->uv_height,
michael@0:                         et_uv, el_uv, eb_uv, er_uv);
michael@0: }
michael@0: 
michael@0: void vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG *src,
michael@0:                                          YV12_BUFFER_CONFIG *dst,
michael@0:                                          int srcy, int srcx,
michael@0:                                          int srch, int srcw) {
michael@0:   // If the side is not touching the bounder then don't extend.
michael@0:   const int et_y = srcy ? 0 : dst->border;
michael@0:   const int el_y = srcx ? 0 : dst->border;
michael@0:   const int eb_y = srcy + srch != src->y_height ? 0 :
michael@0:                       dst->border + dst->y_height - src->y_height;
michael@0:   const int er_y = srcx + srcw != src->y_width ? 0 :
michael@0:                       dst->border + dst->y_width - src->y_width;
michael@0:   const int src_y_offset = srcy * src->y_stride + srcx;
michael@0:   const int dst_y_offset = srcy * dst->y_stride + srcx;
michael@0: 
michael@0:   const int et_uv = ROUND_POWER_OF_TWO(et_y, 1);
michael@0:   const int el_uv = ROUND_POWER_OF_TWO(el_y, 1);
michael@0:   const int eb_uv = ROUND_POWER_OF_TWO(eb_y, 1);
michael@0:   const int er_uv = ROUND_POWER_OF_TWO(er_y, 1);
michael@0:   const int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
michael@0:   const int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
michael@0:   const int srch_uv = ROUND_POWER_OF_TWO(srch, 1);
michael@0:   const int srcw_uv = ROUND_POWER_OF_TWO(srcw, 1);
michael@0: 
michael@0:   copy_and_extend_plane(src->y_buffer + src_y_offset, src->y_stride,
michael@0:                         dst->y_buffer + dst_y_offset, dst->y_stride,
michael@0:                         srcw, srch,
michael@0:                         et_y, el_y, eb_y, er_y);
michael@0: 
michael@0:   copy_and_extend_plane(src->u_buffer + src_uv_offset, src->uv_stride,
michael@0:                         dst->u_buffer + dst_uv_offset, dst->uv_stride,
michael@0:                         srcw_uv, srch_uv,
michael@0:                         et_uv, el_uv, eb_uv, er_uv);
michael@0: 
michael@0:   copy_and_extend_plane(src->v_buffer + src_uv_offset, src->uv_stride,
michael@0:                         dst->v_buffer + dst_uv_offset, dst->uv_stride,
michael@0:                         srcw_uv, srch_uv,
michael@0:                         et_uv, el_uv, eb_uv, er_uv);
michael@0: }