text: /*
   *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   *
   *  Use of this source code is governed by a BSD-style license
   *  that can be found in the LICENSE file in the root of the source
   *  tree. An additional intellectual property rights grant can be found
   *  in the file PATENTS.  All contributing project authors may
   *  be found in the AUTHORS file in the root of the source tree.
   */
  
  
  #include "./vpx_config.h"
  #include "./vpx_dsp_rtcd.h"
  #include "./vp8_rtcd.h"
  #include "vpx_mem/vpx_mem.h"
  #include "vpx_ports/vpx_once.h"
  #include "blockd.h"
  #include "vp8/common/reconintra.h"
  #include "vp8/common/reconintra4x4.h"
  
  enum {
      SIZE_16,
      SIZE_8,
      NUM_SIZES,
  };
  
  typedef void (*intra_pred_fn)(uint8_t *dst, ptrdiff_t stride,
                                const uint8_t *above, const uint8_t *left);
  
  static intra_pred_fn pred[4][NUM_SIZES];
  static intra_pred_fn dc_pred[2][2][NUM_SIZES];
  
  static void vp8_init_intra_predictors_internal(void)
  {
  #define INIT_SIZE(sz) \
      pred[V_PRED][SIZE_##sz] = vpx_v_predictor_##sz##x##sz; \
      pred[H_PRED][SIZE_##sz] = vpx_h_predictor_##sz##x##sz; \
      pred[TM_PRED][SIZE_##sz] = vpx_tm_predictor_##sz##x##sz; \
   \
      dc_pred[0][0][SIZE_##sz] = vpx_dc_128_predictor_##sz##x##sz; \
      dc_pred[0][1][SIZE_##sz] = vpx_dc_top_predictor_##sz##x##sz; \
      dc_pred[1][0][SIZE_##sz] = vpx_dc_left_predictor_##sz##x##sz; \
      dc_pred[1][1][SIZE_##sz] = vpx_dc_predictor_##sz##x##sz
  
      INIT_SIZE(16);
      INIT_SIZE(8);
      vp8_init_intra4x4_predictors_internal();
  }
  
  void vp8_build_intra_predictors_mby_s(MACROBLOCKD *x,
                                        unsigned char * yabove_row,
                                        unsigned char * yleft,
                                        int left_stride,
                                        unsigned char * ypred_ptr,
                                        int y_stride)
  {
      MB_PREDICTION_MODE mode = x->mode_info_context->mbmi.mode;
      DECLARE_ALIGNED(16, uint8_t, yleft_col[16]);
      int i;
      intra_pred_fn fn;
  
      for (i = 0; i < 16; i++)
      {
          yleft_col[i] = yleft[i* left_stride];
      }
  
      if (mode == DC_PRED)
      {
          fn = dc_pred[x->left_available][x->up_available][SIZE_16];
      }
      else
      {
          fn = pred[mode][SIZE_16];
      }
  
      fn(ypred_ptr, y_stride, yabove_row, yleft_col);
  }
  
  void vp8_build_intra_predictors_mbuv_s(MACROBLOCKD *x,
                                         unsigned char * uabove_row,
                                         unsigned char * vabove_row,
                                         unsigned char * uleft,
                                         unsigned char * vleft,
                                         int left_stride,
                                         unsigned char * upred_ptr,
                                         unsigned char * vpred_ptr,
                                         int pred_stride)
  {
      MB_PREDICTION_MODE uvmode = x->mode_info_context->mbmi.uv_mode;
      unsigned char uleft_col[8];
      unsigned char vleft_col[8];
      int i;
      intra_pred_fn fn;
  
      for (i = 0; i < 8; i++)
      {
          uleft_col[i] = uleft[i * left_stride];
          vleft_col[i] = vleft[i * left_stride];
      }
  
      if (uvmode == DC_PRED)
      {
          fn = dc_pred[x->left_available][x->up_available][SIZE_8];
      }
      else
      {
          fn = pred[uvmode][SIZE_8];
      }
  
      fn(upred_ptr, pred_stride, uabove_row, uleft_col);
      fn(vpred_ptr, pred_stride, vabove_row, vleft_col);
  }
  
  void vp8_init_intra_predictors(void)
  {
      once(vp8_init_intra_predictors_internal);
  }
  