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.
   */
  
  #ifndef VPX_VP9_ENCODER_VP9_RD_H_
  #define VPX_VP9_ENCODER_VP9_RD_H_
  
  #include <limits.h>
  
  #include "vp9/common/vp9_blockd.h"
  
  #include "vp9/encoder/vp9_block.h"
  #include "vp9/encoder/vp9_context_tree.h"
  #include "vp9/encoder/vp9_cost.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #define RDDIV_BITS 7
  #define RD_EPB_SHIFT 6
  
  #define RDCOST(RM, DM, R, D) \
    (ROUND_POWER_OF_TWO(((int64_t)R) * (RM), VP9_PROB_COST_SHIFT) + (D << DM))
  #define QIDX_SKIP_THRESH 115
  
  #define MV_COST_WEIGHT 108
  #define MV_COST_WEIGHT_SUB 120
  
  #define INVALID_MV 0x80008000
  
  #define MAX_MODES 30
  #define MAX_REFS 6
  
  #define RD_THRESH_INIT_FACT 32
  #define RD_THRESH_MAX_FACT 64
  #define RD_THRESH_INC 1
  
  #define VP9_DIST_SCALE_LOG2 4
  #define VP9_DIST_SCALE (1 << VP9_DIST_SCALE_LOG2)
  
  // This enumerator type needs to be kept aligned with the mode order in
  // const MODE_DEFINITION vp9_mode_order[MAX_MODES] used in the rd code.
  typedef enum {
    THR_NEARESTMV,
    THR_NEARESTA,
    THR_NEARESTG,
  
    THR_DC,
  
    THR_NEWMV,
    THR_NEWA,
    THR_NEWG,
  
    THR_NEARMV,
    THR_NEARA,
    THR_NEARG,
  
    THR_ZEROMV,
    THR_ZEROG,
    THR_ZEROA,
  
    THR_COMP_NEARESTLA,
    THR_COMP_NEARESTGA,
  
    THR_TM,
  
    THR_COMP_NEARLA,
    THR_COMP_NEWLA,
    THR_COMP_NEARGA,
    THR_COMP_NEWGA,
  
    THR_COMP_ZEROLA,
    THR_COMP_ZEROGA,
  
    THR_H_PRED,
    THR_V_PRED,
    THR_D135_PRED,
    THR_D207_PRED,
    THR_D153_PRED,
    THR_D63_PRED,
    THR_D117_PRED,
    THR_D45_PRED,
  } THR_MODES;
  
  typedef enum {
    THR_LAST,
    THR_GOLD,
    THR_ALTR,
    THR_COMP_LA,
    THR_COMP_GA,
    THR_INTRA,
  } THR_MODES_SUB8X8;
  
  typedef struct RD_OPT {
    // Thresh_mult is used to set a threshold for the rd score. A higher value
    // means that we will accept the best mode so far more often. This number
    // is used in combination with the current block size, and thresh_freq_fact
    // to pick a threshold.
    int thresh_mult[MAX_MODES];
    int thresh_mult_sub8x8[MAX_REFS];
  
    int threshes[MAX_SEGMENTS][BLOCK_SIZES][MAX_MODES];
  
    int64_t prediction_type_threshes[MAX_REF_FRAMES][REFERENCE_MODES];
  
    int64_t filter_threshes[MAX_REF_FRAMES][SWITCHABLE_FILTER_CONTEXTS];
  #if CONFIG_CONSISTENT_RECODE
    int64_t prediction_type_threshes_prev[MAX_REF_FRAMES][REFERENCE_MODES];
  
    int64_t filter_threshes_prev[MAX_REF_FRAMES][SWITCHABLE_FILTER_CONTEXTS];
  #endif
    int RDMULT;
    int RDDIV;
    double r0;
  } RD_OPT;
  
  typedef struct RD_COST {
    int rate;
    int64_t dist;
    int64_t rdcost;
  } RD_COST;
  
  // Reset the rate distortion cost values to maximum (invalid) value.
  void vp9_rd_cost_reset(RD_COST *rd_cost);
  // Initialize the rate distortion cost values to zero.
  void vp9_rd_cost_init(RD_COST *rd_cost);
  
  struct TileInfo;
  struct TileDataEnc;
  struct VP9_COMP;
  struct macroblock;
  
  int vp9_compute_rd_mult_based_on_qindex(const struct VP9_COMP *cpi, int qindex);
  
  int vp9_compute_rd_mult(const struct VP9_COMP *cpi, int qindex);
  
  int vp9_get_adaptive_rdmult(const struct VP9_COMP *cpi, double beta);
  
  void vp9_initialize_rd_consts(struct VP9_COMP *cpi);
  
  void vp9_initialize_me_consts(struct VP9_COMP *cpi, MACROBLOCK *x, int qindex);
  
  void vp9_model_rd_from_var_lapndz(unsigned int var, unsigned int n_log2,
                                    unsigned int qstep, int *rate, int64_t *dist);
  
  void vp9_model_rd_from_var_lapndz_vec(unsigned int var[MAX_MB_PLANE],
                                        unsigned int n_log2[MAX_MB_PLANE],
                                        unsigned int qstep[MAX_MB_PLANE],
                                        int64_t *rate_sum, int64_t *dist_sum);
  
  int vp9_get_switchable_rate(const struct VP9_COMP *cpi,
                              const MACROBLOCKD *const xd);
  
  int vp9_raster_block_offset(BLOCK_SIZE plane_bsize, int raster_block,
                              int stride);
  
  int16_t *vp9_raster_block_offset_int16(BLOCK_SIZE plane_bsize, int raster_block,
                                         int16_t *base);
  
  YV12_BUFFER_CONFIG *vp9_get_scaled_ref_frame(const struct VP9_COMP *cpi,
                                               int ref_frame);
  
  void vp9_init_me_luts(void);
  
  void vp9_get_entropy_contexts(BLOCK_SIZE bsize, TX_SIZE tx_size,
                                const struct macroblockd_plane *pd,
                                ENTROPY_CONTEXT t_above[16],
                                ENTROPY_CONTEXT t_left[16]);
  
  void vp9_set_rd_speed_thresholds(struct VP9_COMP *cpi);
  
  void vp9_set_rd_speed_thresholds_sub8x8(struct VP9_COMP *cpi);
  
  void vp9_update_rd_thresh_fact(int (*factor_buf)[MAX_MODES], int rd_thresh,
                                 int bsize, int best_mode_index);
  
  static INLINE int rd_less_than_thresh(int64_t best_rd, int thresh,
                                        const int *const thresh_fact) {
    return best_rd < ((int64_t)thresh * (*thresh_fact) >> 5) || thresh == INT_MAX;
  }
  
  static INLINE void set_error_per_bit(MACROBLOCK *x, int rdmult) {
    x->errorperbit = rdmult >> RD_EPB_SHIFT;
    x->errorperbit += (x->errorperbit == 0);
  }
  
  void vp9_mv_pred(struct VP9_COMP *cpi, MACROBLOCK *x, uint8_t *ref_y_buffer,
                   int ref_y_stride, int ref_frame, BLOCK_SIZE block_size);
  
  void vp9_setup_pred_block(const MACROBLOCKD *xd,
                            struct buf_2d dst[MAX_MB_PLANE],
                            const YV12_BUFFER_CONFIG *src, int mi_row, int mi_col,
                            const struct scale_factors *scale,
                            const struct scale_factors *scale_uv);
  
  int vp9_get_intra_cost_penalty(const struct VP9_COMP *const cpi,
                                 BLOCK_SIZE bsize, int qindex, int qdelta);
  
  unsigned int vp9_get_sby_variance(struct VP9_COMP *cpi,
                                    const struct buf_2d *ref, BLOCK_SIZE bs);
  unsigned int vp9_get_sby_perpixel_variance(struct VP9_COMP *cpi,
                                             const struct buf_2d *ref,
                                             BLOCK_SIZE bs);
  #if CONFIG_VP9_HIGHBITDEPTH
  unsigned int vp9_high_get_sby_variance(struct VP9_COMP *cpi,
                                         const struct buf_2d *ref, BLOCK_SIZE bs,
                                         int bd);
  unsigned int vp9_high_get_sby_perpixel_variance(struct VP9_COMP *cpi,
                                                  const struct buf_2d *ref,
                                                  BLOCK_SIZE bs, int bd);
  #endif
  
  #ifdef __cplusplus
  }  // extern "C"
  #endif
  
  #endif  // VPX_VP9_ENCODER_VP9_RD_H_
  