text: /*
   * Copyright (c) 2016, Alliance for Open Media. All rights reserved
   *
   * This source code is subject to the terms of the BSD 2 Clause License and
   * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   * was not distributed with this source code in the LICENSE file, you can
   * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   * Media Patent License 1.0 was not distributed with this source code in the
   * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
   */
  
  #ifndef AOM_AV1_COMMON_QUANT_COMMON_H_
  #define AOM_AV1_COMMON_QUANT_COMMON_H_
  
  #include "aom/aom_codec.h"
  #include "av1/common/seg_common.h"
  #include "av1/common/enums.h"
  #include "av1/common/entropy.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #define MINQ 0
  #define MAXQ 255
  #define QINDEX_RANGE (MAXQ - MINQ + 1)
  #define QINDEX_BITS 8
  // Total number of QM sets stored
  #define QM_LEVEL_BITS 4
  #define NUM_QM_LEVELS (1 << QM_LEVEL_BITS)
  /* Range of QMS is between first and last value, with offset applied to inter
   * blocks*/
  #define DEFAULT_QM_Y 10
  #define DEFAULT_QM_U 11
  #define DEFAULT_QM_V 12
  #define DEFAULT_QM_FIRST 5
  #define DEFAULT_QM_LAST 9
  
  struct AV1Common;
  
  int16_t av1_dc_quant_Q3(int qindex, int delta, aom_bit_depth_t bit_depth);
  int16_t av1_ac_quant_Q3(int qindex, int delta, aom_bit_depth_t bit_depth);
  int16_t av1_dc_quant_QTX(int qindex, int delta, aom_bit_depth_t bit_depth);
  int16_t av1_ac_quant_QTX(int qindex, int delta, aom_bit_depth_t bit_depth);
  
  int av1_get_qindex(const struct segmentation *seg, int segment_id,
                     int base_qindex);
  // Reduce the large number of quantizers to a smaller number of levels for which
  // different matrices may be defined
  static INLINE int aom_get_qmlevel(int qindex, int first, int last) {
    return first + (qindex * (last + 1 - first)) / QINDEX_RANGE;
  }
  void av1_qm_init(struct AV1Common *cm);
  const qm_val_t *av1_iqmatrix(struct AV1Common *cm, int qindex, int comp,
                               TX_SIZE tx_size);
  const qm_val_t *av1_qmatrix(struct AV1Common *cm, int qindex, int comp,
                              TX_SIZE tx_size);
  
  #ifdef __cplusplus
  }  // extern "C"
  #endif
  
  #endif  // AOM_AV1_COMMON_QUANT_COMMON_H_
  