/*
 *  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 VP10_COMMON_BLOCKD_H_
#define VP10_COMMON_BLOCKD_H_

#include "./vpx_config.h"

#include "vpx_dsp/vpx_dsp_common.h"
#include "vpx_ports/mem.h"
#include "vpx_scale/yv12config.h"

#include "vp10/common/common_data.h"
#include "vp10/common/entropy.h"
#include "vp10/common/entropymode.h"
#include "vp10/common/mv.h"
#include "vp10/common/scale.h"
#include "vp10/common/seg_common.h"
#include "vp10/common/tile_common.h"

#ifdef __cplusplus
extern "C" {
#endif

#define MAX_MB_PLANE 3

typedef enum {
  KEY_FRAME = 0,
  INTER_FRAME = 1,
  FRAME_TYPES,
} FRAME_TYPE;

#if CONFIG_EXT_INTERP && SUPPORT_NONINTERPOLATING_FILTERS
#define IsInterpolatingFilter(filter) \
    (vp10_filter_kernels[filter][0][SUBPEL_TAPS / 2 - 1] == 128)
#else
#define IsInterpolatingFilter(filter)  (1)
#endif  // CONFIG_EXT_INTERP && SUPPORT_NONINTERPOLATING_FILTERS

static INLINE int is_inter_mode(PREDICTION_MODE mode) {
  return mode >= NEARESTMV && mode <= NEWMV;
}

/* For keyframes, intra block modes are predicted by the (already decoded)
   modes for the Y blocks to the left and above us; for interframes, there
   is a single probability table. */

typedef struct {
  PREDICTION_MODE as_mode;
  int_mv as_mv[2];  // first, second inter predictor motion vectors
} b_mode_info;

// Note that the rate-distortion optimization loop, bit-stream writer, and
// decoder implementation modules critically rely on the defined entry values
// specified herein. They should be refactored concurrently.

#define NONE           -1
#define INTRA_FRAME     0
#define LAST_FRAME      1
#if CONFIG_EXT_REFS
#define LAST2_FRAME     2
#define LAST3_FRAME     3
#define LAST4_FRAME     4
#define GOLDEN_FRAME    5
#define ALTREF_FRAME    6
#define MAX_REF_FRAMES  7
#else
#define GOLDEN_FRAME    2
#define ALTREF_FRAME    3
#define MAX_REF_FRAMES  4
#endif  // CONFIG_EXT_REFS
typedef int8_t MV_REFERENCE_FRAME;

typedef struct {
  // Number of base colors for Y (0) and UV (1)
  uint8_t palette_size[2];
  // Value of base colors for Y, U, and V
#if CONFIG_VP9_HIGHBITDEPTH
  uint16_t palette_colors[3 * PALETTE_MAX_SIZE];
#else
  uint8_t palette_colors[3 * PALETTE_MAX_SIZE];
#endif  // CONFIG_VP9_HIGHBITDEPTH
  // Only used by encoder to store the color index of the top left pixel.
  // TODO(huisu): move this to encoder
  uint8_t palette_first_color_idx[2];
} PALETTE_MODE_INFO;

#if CONFIG_EXT_INTRA
typedef struct {
  // 1: an ext intra mode is used; 0: otherwise.
  uint8_t use_ext_intra_mode[PLANE_TYPES];
  EXT_INTRA_MODE ext_intra_mode[PLANE_TYPES];
} EXT_INTRA_MODE_INFO;
#endif  // CONFIG_EXT_INTRA

// This structure now relates to 8x8 block regions.
typedef struct {
  // Common for both INTER and INTRA blocks
  BLOCK_SIZE sb_type;
  PREDICTION_MODE mode;
  TX_SIZE tx_size;
#if CONFIG_VAR_TX
  // TODO(jingning): This effectively assigned 64 entries for each 8x8 block.
  // Apparently it takes much more space than needed.
  TX_SIZE inter_tx_size[64];
#endif
  int8_t skip;
  int8_t has_no_coeffs;
  int8_t segment_id;
  int8_t seg_id_predicted;  // valid only when temporal_update is enabled

  // Only for INTRA blocks
  PREDICTION_MODE uv_mode;
  PALETTE_MODE_INFO palette_mode_info;

  // Only for INTER blocks
  INTERP_FILTER interp_filter;
  MV_REFERENCE_FRAME ref_frame[2];
#if CONFIG_EXT_TX
  TX_TYPE tx_type;
#endif  // CONFIG_EXT_TX

#if CONFIG_EXT_INTRA
  EXT_INTRA_MODE_INFO ext_intra_mode_info;
  int8_t angle_delta[2];
#endif  // CONFIG_EXT_INTRA

  int_mv mv[2];
  int_mv pred_mv[2];
} MB_MODE_INFO;

typedef struct MODE_INFO {
  MB_MODE_INFO mbmi;
  b_mode_info bmi[4];
} MODE_INFO;

static INLINE PREDICTION_MODE get_y_mode(const MODE_INFO *mi, int block) {
  return mi->mbmi.sb_type < BLOCK_8X8 ? mi->bmi[block].as_mode
                                      : mi->mbmi.mode;
}

static INLINE int is_inter_block(const MB_MODE_INFO *mbmi) {
  return mbmi->ref_frame[0] > INTRA_FRAME;
}

static INLINE int has_second_ref(const MB_MODE_INFO *mbmi) {
  return mbmi->ref_frame[1] > INTRA_FRAME;
}

PREDICTION_MODE vp10_left_block_mode(const MODE_INFO *cur_mi,
                                    const MODE_INFO *left_mi, int b);

PREDICTION_MODE vp10_above_block_mode(const MODE_INFO *cur_mi,
                                     const MODE_INFO *above_mi, int b);

enum mv_precision {
  MV_PRECISION_Q3,
  MV_PRECISION_Q4
};

struct buf_2d {
  uint8_t *buf;
  int stride;
};

struct macroblockd_plane {
  tran_low_t *dqcoeff;
  PLANE_TYPE plane_type;
  int subsampling_x;
  int subsampling_y;
  struct buf_2d dst;
  struct buf_2d pre[2];
  ENTROPY_CONTEXT *above_context;
  ENTROPY_CONTEXT *left_context;
  int16_t seg_dequant[MAX_SEGMENTS][2];
  uint8_t *color_index_map;

  // number of 4x4s in current block
  uint16_t n4_w, n4_h;
  // log2 of n4_w, n4_h
  uint8_t n4_wl, n4_hl;

  // encoder
  const int16_t *dequant;
};

#define BLOCK_OFFSET(x, i) ((x) + (i) * 16)

typedef struct RefBuffer {
  // TODO(dkovalev): idx is not really required and should be removed, now it
  // is used in vp10_onyxd_if.c
  int idx;
  YV12_BUFFER_CONFIG *buf;
  struct scale_factors sf;
} RefBuffer;

typedef struct macroblockd {
  struct macroblockd_plane plane[MAX_MB_PLANE];
  uint8_t bmode_blocks_wl;
  uint8_t bmode_blocks_hl;

  FRAME_COUNTS *counts;
  TileInfo tile;

  int mi_stride;

  MODE_INFO **mi;
  MODE_INFO *left_mi;
  MODE_INFO *above_mi;
  MB_MODE_INFO *left_mbmi;
  MB_MODE_INFO *above_mbmi;

  int up_available;
  int left_available;

  const vpx_prob (*partition_probs)[PARTITION_TYPES - 1];

  /* Distance of MB away from frame edges */
  int mb_to_left_edge;
  int mb_to_right_edge;
  int mb_to_top_edge;
  int mb_to_bottom_edge;

  FRAME_CONTEXT *fc;

  /* pointers to reference frames */
  RefBuffer *block_refs[2];

  /* pointer to current frame */
  const YV12_BUFFER_CONFIG *cur_buf;

  ENTROPY_CONTEXT *above_context[MAX_MB_PLANE];
  ENTROPY_CONTEXT left_context[MAX_MB_PLANE][16];

  PARTITION_CONTEXT *above_seg_context;
  PARTITION_CONTEXT left_seg_context[8];

#if CONFIG_VAR_TX
  TXFM_CONTEXT *above_txfm_context;
  TXFM_CONTEXT *left_txfm_context;
  TXFM_CONTEXT left_txfm_context_buffer[8];

  TX_SIZE max_tx_size;
#endif

  // dimension in the unit of 8x8 block of the current block
  uint8_t n8_w, n8_h;

#if CONFIG_REF_MV
  uint8_t ref_mv_count[MAX_REF_FRAMES];
  CANDIDATE_MV ref_mv_stack[MAX_REF_FRAMES][MAX_REF_MV_STACK_SIZE];
  uint8_t is_sec_rect;
#endif

#if CONFIG_VP9_HIGHBITDEPTH
  /* Bit depth: 8, 10, 12 */
  int bd;
#endif

  int lossless[MAX_SEGMENTS];
  int corrupted;

  struct vpx_internal_error_info *error_info;
} MACROBLOCKD;

static INLINE BLOCK_SIZE get_subsize(BLOCK_SIZE bsize,
                                     PARTITION_TYPE partition) {
  return subsize_lookup[partition][bsize];
}

static const TX_TYPE intra_mode_to_tx_type_lookup[INTRA_MODES] = {
  DCT_DCT,    // DC
  ADST_DCT,   // V
  DCT_ADST,   // H
  DCT_DCT,    // D45
  ADST_ADST,  // D135
  ADST_DCT,   // D117
  DCT_ADST,   // D153
  DCT_ADST,   // D207
  ADST_DCT,   // D63
  ADST_ADST,  // TM
};

#if CONFIG_EXT_TX
#define ALLOW_INTRA_EXT_TX 1

static const int num_ext_tx_set_inter[EXT_TX_SETS_INTER] = {
  1, 17, 10, 2
};
static const int num_ext_tx_set_intra[EXT_TX_SETS_INTRA] = {
  1, 17, 10
};

#define USE_IDTX_FOR_32X32 0
static INLINE int get_ext_tx_set(TX_SIZE tx_size, BLOCK_SIZE bs,
                                 int is_inter) {
  (void) is_inter;
  if (tx_size > TX_32X32 || bs < BLOCK_8X8) return 0;
#if USE_IDTX_FOR_32X32
  if (tx_size == TX_32X32) return is_inter ? 3 : 0;
#else
  if (tx_size == TX_32X32) return 0;
#endif
  return tx_size == TX_16X16 ? 2 : 1;
}

static INLINE int get_ext_tx_types(TX_SIZE tx_size, BLOCK_SIZE bs,
                                   int is_inter) {
  const int set = get_ext_tx_set(tx_size, bs, is_inter);
  return is_inter ? num_ext_tx_set_inter[set] : num_ext_tx_set_intra[set];
}

static const int use_intra_ext_tx_for_txsize[EXT_TX_SETS_INTRA][TX_SIZES] = {
  { 0, 0, 0, 0, },  // unused
  { 1, 1, 0, 0, },
  { 0, 0, 1, 0, },
};

static const int use_inter_ext_tx_for_txsize[EXT_TX_SETS_INTER][TX_SIZES] = {
  { 0, 0, 0, 0, },  // unused
  { 1, 1, 0, 0, },
  { 0, 0, 1, 0, },
  { 0, 0, 0, USE_IDTX_FOR_32X32, },
};

// Transform types used in each intra set
static const int ext_tx_used_intra[EXT_TX_SETS_INTRA][TX_TYPES] = {
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, },
  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, },
};

// Transform types used in each inter set
static const int ext_tx_used_inter[EXT_TX_SETS_INTER][TX_TYPES] = {
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, },
  { 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, },
};
#endif  // CONFIG_EXT_TX

#if CONFIG_EXT_INTRA
#define ALLOW_FILTER_INTRA_MODES 1
#define ANGLE_STEP 3
#define MAX_ANGLE_DELTAS 3
#define ANGLE_FAST_SEARCH 1
#define ANGLE_SKIP_THRESH 0.10

static uint8_t mode_to_angle_map[INTRA_MODES] = {
    0, 90, 180, 45, 135, 111, 157, 203, 67, 0,
};

static const TX_TYPE filter_intra_mode_to_tx_type_lookup[FILTER_INTRA_MODES] = {
  DCT_DCT,    // FILTER_DC
  ADST_DCT,   // FILTER_V
  DCT_ADST,   // FILTER_H
  DCT_DCT,    // FILTER_D45
  ADST_ADST,  // FILTER_D135
  ADST_DCT,   // FILTER_D117
  DCT_ADST,   // FILTER_D153
  DCT_ADST,   // FILTER_D207
  ADST_DCT,   // FILTER_D63
  ADST_ADST,  // FILTER_TM
};
#endif  // CONFIG_EXT_INTRA

static INLINE TX_TYPE get_tx_type(PLANE_TYPE plane_type,
                                  const MACROBLOCKD *xd,
                                  int block_idx, TX_SIZE tx_size) {
  const MODE_INFO *const mi = xd->mi[0];
  const MB_MODE_INFO *const mbmi = &mi->mbmi;

#if CONFIG_EXT_INTRA
  if (!is_inter_block(mbmi)) {
    const int use_ext_intra_mode_info =
        mbmi->ext_intra_mode_info.use_ext_intra_mode[plane_type];
    const EXT_INTRA_MODE ext_intra_mode =
        mbmi->ext_intra_mode_info.ext_intra_mode[plane_type];
    const PREDICTION_MODE mode = (plane_type == PLANE_TYPE_Y) ?
        get_y_mode(mi, block_idx) : mbmi->uv_mode;

    if (xd->lossless[mbmi->segment_id] || tx_size >= TX_32X32)
      return DCT_DCT;

#if CONFIG_EXT_TX
    if (mbmi->sb_type >= BLOCK_8X8 && plane_type == PLANE_TYPE_Y &&
        ALLOW_INTRA_EXT_TX)
      return mbmi->tx_type;
#endif  // CONFIG_EXT_TX

    if (use_ext_intra_mode_info)
      return filter_intra_mode_to_tx_type_lookup[ext_intra_mode];

    if (mode == DC_PRED) {
      return DCT_DCT;
    } else if (mode == TM_PRED) {
      return ADST_ADST;
    } else {
      int angle = mode_to_angle_map[mode];
      if (mbmi->sb_type >= BLOCK_8X8)
        angle += mbmi->angle_delta[plane_type] * ANGLE_STEP;
      assert(angle > 0 && angle < 270);
      if (angle == 135)
        return ADST_ADST;
      else if (angle < 45 || angle > 225)
        return DCT_DCT;
      else if (angle < 135)
        return ADST_DCT;
      else
        return DCT_ADST;
    }
  }
#endif  // CONFIG_EXT_INTRA

#if CONFIG_EXT_TX
#if USE_IDTX_FOR_32X32
  if (xd->lossless[mbmi->segment_id] || tx_size > TX_32X32 ||
      (tx_size >= TX_32X32 && !is_inter_block(mbmi)))
#else
  if (xd->lossless[mbmi->segment_id] || tx_size >= TX_32X32)
#endif
    return DCT_DCT;
  if (mbmi->sb_type >= BLOCK_8X8) {
    if (plane_type == PLANE_TYPE_Y) {
      if (is_inter_block(mbmi) || ALLOW_INTRA_EXT_TX)
      return mbmi->tx_type;
    }
    if (is_inter_block(mbmi))
      // UV Inter only
      return (mbmi->tx_type == IDTX && tx_size == TX_32X32 ?
              DCT_DCT : mbmi->tx_type);
  }

  // Sub8x8-Inter/Intra OR UV-Intra
  if (is_inter_block(mbmi))  // Sub8x8-Inter
    return DCT_DCT;
  else  // Sub8x8 Intra OR UV-Intra
    return intra_mode_to_tx_type_lookup[plane_type == PLANE_TYPE_Y ?
        get_y_mode(mi, block_idx) : mbmi->uv_mode];
#else
  if (plane_type != PLANE_TYPE_Y || xd->lossless[mbmi->segment_id] ||
       is_inter_block(mbmi) || tx_size >= TX_32X32)
    return DCT_DCT;
  return intra_mode_to_tx_type_lookup[get_y_mode(mi, block_idx)];
#endif  // CONFIG_EXT_TX
}

void vp10_setup_block_planes(MACROBLOCKD *xd, int ss_x, int ss_y);

static INLINE TX_SIZE get_uv_tx_size_impl(TX_SIZE y_tx_size, BLOCK_SIZE bsize,
                                          int xss, int yss) {
  if (bsize < BLOCK_8X8) {
    return TX_4X4;
  } else {
    const BLOCK_SIZE plane_bsize = ss_size_lookup[bsize][xss][yss];
    return VPXMIN(y_tx_size, max_txsize_lookup[plane_bsize]);
  }
}

static INLINE TX_SIZE get_uv_tx_size(const MB_MODE_INFO *mbmi,
                                     const struct macroblockd_plane *pd) {
  return get_uv_tx_size_impl(mbmi->tx_size, mbmi->sb_type, pd->subsampling_x,
                             pd->subsampling_y);
}

static INLINE BLOCK_SIZE get_plane_block_size(BLOCK_SIZE bsize,
    const struct macroblockd_plane *pd) {
  return ss_size_lookup[bsize][pd->subsampling_x][pd->subsampling_y];
}

static INLINE void reset_skip_context(MACROBLOCKD *xd, BLOCK_SIZE bsize) {
  int i;
  for (i = 0; i < MAX_MB_PLANE; i++) {
    struct macroblockd_plane *const pd = &xd->plane[i];
    const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
    memset(pd->above_context, 0,
           sizeof(ENTROPY_CONTEXT) * num_4x4_blocks_wide_lookup[plane_bsize]);
    memset(pd->left_context, 0,
           sizeof(ENTROPY_CONTEXT) * num_4x4_blocks_high_lookup[plane_bsize]);
  }
}

typedef void (*foreach_transformed_block_visitor)(int plane, int block,
                                                  int blk_row, int blk_col,
                                                  BLOCK_SIZE plane_bsize,
                                                  TX_SIZE tx_size,
                                                  void *arg);

void vp10_foreach_transformed_block_in_plane(
    const MACROBLOCKD *const xd, BLOCK_SIZE bsize, int plane,
    foreach_transformed_block_visitor visit, void *arg);

void vp10_foreach_transformed_block(
    const MACROBLOCKD* const xd, BLOCK_SIZE bsize,
    foreach_transformed_block_visitor visit, void *arg);

void vp10_set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd,
                      BLOCK_SIZE plane_bsize, TX_SIZE tx_size, int has_eob,
                      int aoff, int loff);

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

#endif  // VP10_COMMON_BLOCKD_H_