/*
 * Copyright (c) 2017, 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.
 */
#include "av1/decoder/decoder.h"
#include "av1/decoder/inspection.h"
#include "av1/common/enums.h"
#include "av1/common/cdef.h"

static void ifd_init_mi_rc(insp_frame_data *fd, int mi_cols, int mi_rows) {
  fd->mi_cols = mi_cols;
  fd->mi_rows = mi_rows;
  fd->mi_grid = (insp_mi_data *)aom_malloc(sizeof(insp_mi_data) * fd->mi_rows *
                                           fd->mi_cols);
}

void ifd_init(insp_frame_data *fd, int frame_width, int frame_height) {
  int mi_cols = ALIGN_POWER_OF_TWO(frame_width, 3) >> MI_SIZE_LOG2;
  int mi_rows = ALIGN_POWER_OF_TWO(frame_height, 3) >> MI_SIZE_LOG2;
  ifd_init_mi_rc(fd, mi_cols, mi_rows);
}

void ifd_clear(insp_frame_data *fd) {
  aom_free(fd->mi_grid);
  fd->mi_grid = NULL;
}

/* TODO(negge) This function may be called by more than one thread when using
               a multi-threaded decoder and this may cause a data race. */
int ifd_inspect(insp_frame_data *fd, void *decoder) {
  struct AV1Decoder *pbi = (struct AV1Decoder *)decoder;
  AV1_COMMON *const cm = &pbi->common;

  if (fd->mi_rows != cm->mi_rows || fd->mi_cols != cm->mi_cols) {
    ifd_clear(fd);
    ifd_init_mi_rc(fd, cm->mi_rows, cm->mi_cols);
  }
  fd->show_existing_frame = cm->show_existing_frame;
  fd->frame_number = cm->current_video_frame;
  fd->show_frame = cm->show_frame;
  fd->frame_type = cm->frame_type;
  fd->base_qindex = cm->base_qindex;
  // Set width and height of the first tile until generic support can be added
  TileInfo tile_info;
  av1_tile_set_row(&tile_info, cm, 0);
  av1_tile_set_col(&tile_info, cm, 0);
  fd->tile_mi_cols = tile_info.mi_col_end - tile_info.mi_col_start;
  fd->tile_mi_rows = tile_info.mi_row_end - tile_info.mi_row_start;
  fd->delta_q_present_flag = cm->delta_q_present_flag;
  fd->delta_q_res = cm->delta_q_res;
#if CONFIG_ACCOUNTING
  fd->accounting = &pbi->accounting;
#endif
  // TODO(negge): copy per frame CDEF data
  int i, j;
  for (i = 0; i < MAX_SEGMENTS; i++) {
    for (j = 0; j < 2; j++) {
      fd->y_dequant[i][j] = cm->y_dequant_QTX[i][j];
      fd->u_dequant[i][j] = cm->u_dequant_QTX[i][j];
      fd->v_dequant[i][j] = cm->v_dequant_QTX[i][j];
    }
  }
  for (j = 0; j < cm->mi_rows; j++) {
    for (i = 0; i < cm->mi_cols; i++) {
      const MB_MODE_INFO *mbmi = cm->mi_grid_visible[j * cm->mi_stride + i];
      insp_mi_data *mi = &fd->mi_grid[j * cm->mi_cols + i];
      // Segment
      mi->segment_id = mbmi->segment_id;
      // Motion Vectors
      mi->mv[0].row = mbmi->mv[0].as_mv.row;
      mi->mv[0].col = mbmi->mv[0].as_mv.col;
      mi->mv[1].row = mbmi->mv[1].as_mv.row;
      mi->mv[1].col = mbmi->mv[1].as_mv.col;
      // Reference Frames
      mi->ref_frame[0] = mbmi->ref_frame[0];
      mi->ref_frame[1] = mbmi->ref_frame[1];
      // Prediction Mode
      mi->mode = mbmi->mode;
      // Prediction Mode for Chromatic planes
      if (mi->mode < INTRA_MODES) {
        mi->uv_mode = mbmi->uv_mode;
      } else {
        mi->uv_mode = UV_MODE_INVALID;
      }

      mi->motion_mode = mbmi->motion_mode;
      mi->compound_type = mbmi->interinter_comp.type;

      // Block Size
      mi->sb_type = mbmi->sb_type;
      // Skip Flag
      mi->skip = mbmi->skip;
      mi->filter[0] = av1_extract_interp_filter(mbmi->interp_filters, 0);
      mi->filter[1] = av1_extract_interp_filter(mbmi->interp_filters, 1);
      mi->dual_filter_type = mi->filter[0] * 3 + mi->filter[1];

      // Transform
      // TODO(anyone): extract tx type info from mbmi->txk_type[].

      const BLOCK_SIZE bsize = mbmi->sb_type;
      const int c = i % mi_size_wide[bsize];
      const int r = j % mi_size_high[bsize];
      if (is_inter_block(mbmi) || is_intrabc_block(mbmi))
        mi->tx_size = mbmi->inter_tx_size[av1_get_txb_size_index(bsize, r, c)];
      else
        mi->tx_size = mbmi->tx_size;

      mi->tx_type =
          (mi->skip ? 0 : mbmi->txk_type[av1_get_txk_type_index(bsize, r, c)]);

      mi->cdef_level =
          cm->cdef_strengths[mbmi->cdef_strength] / CDEF_SEC_STRENGTHS;
      mi->cdef_strength =
          cm->cdef_strengths[mbmi->cdef_strength] % CDEF_SEC_STRENGTHS;
      mi->cdef_strength += mi->cdef_strength == 3;
      if (mbmi->uv_mode == UV_CFL_PRED) {
        mi->cfl_alpha_idx = mbmi->cfl_alpha_idx;
        mi->cfl_alpha_sign = mbmi->cfl_alpha_signs;
      } else {
        mi->cfl_alpha_idx = 0;
        mi->cfl_alpha_sign = 0;
      }
      // delta_q
      mi->current_qindex = mbmi->current_qindex;
    }
  }
  return 1;
}