common_dec.h

// Copyright 2015 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// Definitions and macros common to encoding and decoding
//
// Author: Skal ([email protected])

#ifndef WEBP_DEC_COMMON_DEC_H_
#define WEBP_DEC_COMMON_DEC_H_

// intra prediction modes
enum { B_DC_PRED = 0,   // 4x4 modes
       B_TM_PRED = 1,
       B_VE_PRED = 2,
       B_HE_PRED = 3,
       B_RD_PRED = 4,
       B_VR_PRED = 5,
       B_LD_PRED = 6,
       B_VL_PRED = 7,
       B_HD_PRED = 8,
       B_HU_PRED = 9,
       NUM_BMODES = B_HU_PRED + 1 - B_DC_PRED,  // = 10

       // Luma16 or UV modes
       DC_PRED = B_DC_PRED, V_PRED = B_VE_PRED,
       H_PRED = B_HE_PRED, TM_PRED = B_TM_PRED,
       B_PRED = NUM_BMODES,   // refined I4x4 mode
       NUM_PRED_MODES = 4,

       // special modes
       B_DC_PRED_NOTOP = 4,
       B_DC_PRED_NOLEFT = 5,
       B_DC_PRED_NOTOPLEFT = 6,
       NUM_B_DC_MODES = 7 };

enum { MB_FEATURE_TREE_PROBS = 3,
       NUM_MB_SEGMENTS = 4,
       NUM_REF_LF_DELTAS = 4,
       NUM_MODE_LF_DELTAS = 4,    // I4x4, ZERO, *, SPLIT
       MAX_NUM_PARTITIONS = 8,
       // Probabilities
       NUM_TYPES = 4,   // 0: i16-AC,  1: i16-DC,  2:chroma-AC,  3:i4-AC
       NUM_BANDS = 8,
       NUM_CTX = 3,
       NUM_PROBAS = 11
     };

#endif  // WEBP_DEC_COMMON_DEC_H_