gecko-dev/media/libvpx/vp9/common/vp9_enums.h

/*
 *  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 VP9_COMMON_VP9_ENUMS_H_
#define VP9_COMMON_VP9_ENUMS_H_

#include "./vpx_config.h"

#ifdef __cplusplus
extern "C" {
#endif

#define MI_SIZE_LOG2 3
#define MI_BLOCK_SIZE_LOG2 (6 - MI_SIZE_LOG2)  // 64 = 2^6

#define MI_SIZE (1 << MI_SIZE_LOG2)  // pixels per mi-unit
#define MI_BLOCK_SIZE (1 << MI_BLOCK_SIZE_LOG2)  // mi-units per max block

#define MI_MASK (MI_BLOCK_SIZE - 1)

// Bitstream profiles indicated by 2-3 bits in the uncompressed header.
// 00: Profile 0.  8-bit 4:2:0 only.
// 10: Profile 1.  8-bit 4:4:4, 4:2:2, and 4:4:0.
// 01: Profile 2.  10-bit and 12-bit color only, with 4:2:0 sampling.
// 110: Profile 3. 10-bit and 12-bit color only, with 4:2:2/4:4:4/4:4:0
//                 sampling.
// 111: Undefined profile.
typedef enum BITSTREAM_PROFILE {
  PROFILE_0,
  PROFILE_1,
  PROFILE_2,
  PROFILE_3,
  MAX_PROFILES
} BITSTREAM_PROFILE;

typedef enum BLOCK_SIZE {
  BLOCK_4X4,
  BLOCK_4X8,
  BLOCK_8X4,
  BLOCK_8X8,
  BLOCK_8X16,
  BLOCK_16X8,
  BLOCK_16X16,
  BLOCK_16X32,
  BLOCK_32X16,
  BLOCK_32X32,
  BLOCK_32X64,
  BLOCK_64X32,
  BLOCK_64X64,
  BLOCK_SIZES,
  BLOCK_INVALID = BLOCK_SIZES
} BLOCK_SIZE;

typedef enum PARTITION_TYPE {
  PARTITION_NONE,
  PARTITION_HORZ,
  PARTITION_VERT,
  PARTITION_SPLIT,
  PARTITION_TYPES,
  PARTITION_INVALID = PARTITION_TYPES
} PARTITION_TYPE;

typedef char PARTITION_CONTEXT;
#define PARTITION_PLOFFSET   4  // number of probability models per block size
#define PARTITION_CONTEXTS (4 * PARTITION_PLOFFSET)

// block transform size
typedef enum {
  TX_4X4 = 0,                      // 4x4 transform
  TX_8X8 = 1,                      // 8x8 transform
  TX_16X16 = 2,                    // 16x16 transform
  TX_32X32 = 3,                    // 32x32 transform
  TX_SIZES
} TX_SIZE;

// frame transform mode
typedef enum {
  ONLY_4X4            = 0,        // only 4x4 transform used
  ALLOW_8X8           = 1,        // allow block transform size up to 8x8
  ALLOW_16X16         = 2,        // allow block transform size up to 16x16
  ALLOW_32X32         = 3,        // allow block transform size up to 32x32
  TX_MODE_SELECT      = 4,        // transform specified for each block
  TX_MODES            = 5,
} TX_MODE;

typedef enum {
  DCT_DCT   = 0,                      // DCT  in both horizontal and vertical
  ADST_DCT  = 1,                      // ADST in vertical, DCT in horizontal
  DCT_ADST  = 2,                      // DCT  in vertical, ADST in horizontal
  ADST_ADST = 3,                      // ADST in both directions
  TX_TYPES = 4
} TX_TYPE;

typedef enum {
  VP9_LAST_FLAG = 1 << 0,
  VP9_GOLD_FLAG = 1 << 1,
  VP9_ALT_FLAG = 1 << 2,
} VP9_REFFRAME;

typedef enum {
  PLANE_TYPE_Y  = 0,
  PLANE_TYPE_UV = 1,
  PLANE_TYPES
} PLANE_TYPE;

typedef enum {
  DC_PRED,         // Average of above and left pixels
  V_PRED,          // Vertical
  H_PRED,          // Horizontal
  D45_PRED,        // Directional 45  deg = round(arctan(1/1) * 180/pi)
  D135_PRED,       // Directional 135 deg = 180 - 45
  D117_PRED,       // Directional 117 deg = 180 - 63
  D153_PRED,       // Directional 153 deg = 180 - 27
  D207_PRED,       // Directional 207 deg = 180 + 27
  D63_PRED,        // Directional 63  deg = round(arctan(2/1) * 180/pi)
  TM_PRED,         // True-motion
  NEARESTMV,
  NEARMV,
  ZEROMV,
  NEWMV,
  MB_MODE_COUNT
} PREDICTION_MODE;

#define INTRA_MODES (TM_PRED + 1)

#define INTER_MODES (1 + NEWMV - NEARESTMV)

#define SKIP_CONTEXTS 3
#define INTER_MODE_CONTEXTS 7

/* Segment Feature Masks */
#define MAX_MV_REF_CANDIDATES 2

#define INTRA_INTER_CONTEXTS 4
#define COMP_INTER_CONTEXTS 5
#define REF_CONTEXTS 5

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // VP9_COMMON_VP9_ENUMS_H_