vp9/encoder/vp9_extend.c

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #include "vpx_mem/vpx_mem.h"
  12
  13 #include "vp9/common/vp9_common.h"
  14 #include "vp9/encoder/vp9_extend.h"
  15
  16 static void copy_and_extend_plane(const uint8_t *src, int src_pitch,
  17                                   uint8_t *dst, int dst_pitch,
  18                                   int w, int h,
  19                                   int extend_top, int extend_left,
  20                                   int extend_bottom, int extend_right) {
  21   int i, linesize;
  22
  23   // copy the left and right most columns out
  24   const uint8_t *src_ptr1 = src;
  25   const uint8_t *src_ptr2 = src + w - 1;
  26   uint8_t *dst_ptr1 = dst - extend_left;
  27   uint8_t *dst_ptr2 = dst + w;
  28
  29   for (i = 0; i < h; i++) {
  30     vpx_memset(dst_ptr1, src_ptr1[0], extend_left);
  31     vpx_memcpy(dst_ptr1 + extend_left, src_ptr1, w);
  32     vpx_memset(dst_ptr2, src_ptr2[0], extend_right);
  33     src_ptr1 += src_pitch;
  34     src_ptr2 += src_pitch;
  35     dst_ptr1 += dst_pitch;
  36     dst_ptr2 += dst_pitch;
  37   }
  38
  39   // Now copy the top and bottom lines into each line of the respective
  40   // borders
  41   src_ptr1 = dst - extend_left;
  42   src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
  43   dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
  44   dst_ptr2 = dst + dst_pitch * (h) - extend_left;
  45   linesize = extend_left + extend_right + w;
  46
  47   for (i = 0; i < extend_top; i++) {
  48     vpx_memcpy(dst_ptr1, src_ptr1, linesize);
  49     dst_ptr1 += dst_pitch;
  50   }
  51
  52   for (i = 0; i < extend_bottom; i++) {
  53     vpx_memcpy(dst_ptr2, src_ptr2, linesize);
  54     dst_ptr2 += dst_pitch;
  55   }
  56 }
  57
  58 #if CONFIG_VP9_HIGHBITDEPTH
  59 static void highbd_copy_and_extend_plane(const uint8_t *src8, int src_pitch,
  60                                          uint8_t *dst8, int dst_pitch,
  61                                          int w, int h,
  62                                          int extend_top, int extend_left,
  63                                          int extend_bottom, int extend_right) {
  64   int i, linesize;
  65   uint16_t *src = CONVERT_TO_SHORTPTR(src8);
  66   uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
  67
  68   // copy the left and right most columns out
  69   const uint16_t *src_ptr1 = src;
  70   const uint16_t *src_ptr2 = src + w - 1;
  71   uint16_t *dst_ptr1 = dst - extend_left;
  72   uint16_t *dst_ptr2 = dst + w;
  73
  74   for (i = 0; i < h; i++) {
  75     vpx_memset16(dst_ptr1, src_ptr1[0], extend_left);
  76     vpx_memcpy(dst_ptr1 + extend_left, src_ptr1, w * sizeof(uint16_t));
  77     vpx_memset16(dst_ptr2, src_ptr2[0], extend_right);
  78     src_ptr1 += src_pitch;
  79     src_ptr2 += src_pitch;
  80     dst_ptr1 += dst_pitch;
  81     dst_ptr2 += dst_pitch;
  82   }
  83
  84   // Now copy the top and bottom lines into each line of the respective
  85   // borders
  86   src_ptr1 = dst - extend_left;
  87   src_ptr2 = dst + dst_pitch * (h - 1) - extend_left;
  88   dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left;
  89   dst_ptr2 = dst + dst_pitch * (h) - extend_left;
  90   linesize = extend_left + extend_right + w;
  91
  92   for (i = 0; i < extend_top; i++) {
  93     vpx_memcpy(dst_ptr1, src_ptr1, linesize * sizeof(uint16_t));
  94     dst_ptr1 += dst_pitch;
  95   }
  96
  97   for (i = 0; i < extend_bottom; i++) {
  98     vpx_memcpy(dst_ptr2, src_ptr2, linesize * sizeof(uint16_t));
  99     dst_ptr2 += dst_pitch;
 100   }
 101 }
 102 #endif  // CONFIG_VP9_HIGHBITDEPTH
 103
 104 void vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG *src,
 105                                YV12_BUFFER_CONFIG *dst) {
 106   // Extend src frame in buffer
 107   // Altref filtering assumes 16 pixel extension
 108   const int et_y = 16;
 109   const int el_y = 16;
 110   // Motion estimation may use src block variance with the block size up
 111   // to 64x64, so the right and bottom need to be extended to 64 multiple
 112   // or up to 16, whichever is greater.
 113   const int eb_y = MAX(src->y_width + 16, ALIGN_POWER_OF_TWO(src->y_width, 6))
 114       - src->y_crop_width;
 115   const int er_y = MAX(src->y_height + 16, ALIGN_POWER_OF_TWO(src->y_height, 6))
 116       - src->y_crop_height;
 117   const int uv_width_subsampling = (src->uv_width != src->y_width);
 118   const int uv_height_subsampling = (src->uv_height != src->y_height);
 119   const int et_uv = et_y >> uv_height_subsampling;
 120   const int el_uv = el_y >> uv_width_subsampling;
 121   const int eb_uv = eb_y >> uv_height_subsampling;
 122   const int er_uv = er_y >> uv_width_subsampling;
 123
 124 #if CONFIG_VP9_HIGHBITDEPTH
 125   if (src->flags & YV12_FLAG_HIGHBITDEPTH) {
 126     highbd_copy_and_extend_plane(src->y_buffer, src->y_stride,
 127                                  dst->y_buffer, dst->y_stride,
 128                                  src->y_crop_width, src->y_crop_height,
 129                                  et_y, el_y, eb_y, er_y);
 130
 131     highbd_copy_and_extend_plane(src->u_buffer, src->uv_stride,
 132                                  dst->u_buffer, dst->uv_stride,
 133                                  src->uv_crop_width, src->uv_crop_height,
 134                                  et_uv, el_uv, eb_uv, er_uv);
 135
 136     highbd_copy_and_extend_plane(src->v_buffer, src->uv_stride,
 137                                  dst->v_buffer, dst->uv_stride,
 138                                  src->uv_crop_width, src->uv_crop_height,
 139                                  et_uv, el_uv, eb_uv, er_uv);
 140     return;
 141   }
 142 #endif  // CONFIG_VP9_HIGHBITDEPTH
 143
 144   copy_and_extend_plane(src->y_buffer, src->y_stride,
 145                         dst->y_buffer, dst->y_stride,
 146                         src->y_crop_width, src->y_crop_height,
 147                         et_y, el_y, eb_y, er_y);
 148
 149   copy_and_extend_plane(src->u_buffer, src->uv_stride,
 150                         dst->u_buffer, dst->uv_stride,
 151                         src->uv_crop_width, src->uv_crop_height,
 152                         et_uv, el_uv, eb_uv, er_uv);
 153
 154   copy_and_extend_plane(src->v_buffer, src->uv_stride,
 155                         dst->v_buffer, dst->uv_stride,
 156                         src->uv_crop_width, src->uv_crop_height,
 157                         et_uv, el_uv, eb_uv, er_uv);
 158 }
 159
 160 void vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG *src,
 161                                          YV12_BUFFER_CONFIG *dst,
 162                                          int srcy, int srcx,
 163                                          int srch, int srcw) {
 164   // If the side is not touching the bounder then don't extend.
 165   const int et_y = srcy ? 0 : dst->border;
 166   const int el_y = srcx ? 0 : dst->border;
 167   const int eb_y = srcy + srch != src->y_height ? 0 :
 168                       dst->border + dst->y_height - src->y_height;
 169   const int er_y = srcx + srcw != src->y_width ? 0 :
 170                       dst->border + dst->y_width - src->y_width;
 171   const int src_y_offset = srcy * src->y_stride + srcx;
 172   const int dst_y_offset = srcy * dst->y_stride + srcx;
 173
 174   const int et_uv = ROUND_POWER_OF_TWO(et_y, 1);
 175   const int el_uv = ROUND_POWER_OF_TWO(el_y, 1);
 176   const int eb_uv = ROUND_POWER_OF_TWO(eb_y, 1);
 177   const int er_uv = ROUND_POWER_OF_TWO(er_y, 1);
 178   const int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1);
 179   const int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1);
 180   const int srch_uv = ROUND_POWER_OF_TWO(srch, 1);
 181   const int srcw_uv = ROUND_POWER_OF_TWO(srcw, 1);
 182
 183   copy_and_extend_plane(src->y_buffer + src_y_offset, src->y_stride,
 184                         dst->y_buffer + dst_y_offset, dst->y_stride,
 185                         srcw, srch,
 186                         et_y, el_y, eb_y, er_y);
 187
 188   copy_and_extend_plane(src->u_buffer + src_uv_offset, src->uv_stride,
 189                         dst->u_buffer + dst_uv_offset, dst->uv_stride,
 190                         srcw_uv, srch_uv,
 191                         et_uv, el_uv, eb_uv, er_uv);
 192
 193   copy_and_extend_plane(src->v_buffer + src_uv_offset, src->uv_stride,
 194                         dst->v_buffer + dst_uv_offset, dst->uv_stride,
 195                         srcw_uv, srch_uv,
 196                         et_uv, el_uv, eb_uv, er_uv);
 197 }