/*
 * Copyright (c) 2021, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 3-Clause Clear License
 * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
 * License was not distributed with this source code in the LICENSE file, you
 * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/.  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
 * aomedia.org/license/patent-license/.
 */

#include "third_party/googletest/src/googletest/include/gtest/gtest.h"

#include "config/aom_config.h"

#include "aom_mem/aom_mem.h"
#include "av1/common/av1_common_int.h"
#include "av1/common/blockd.h"
#include "av1/common/enums.h"
#include "av1/common/mv.h"
#include "av1/common/mvref_common.h"
#include "av1/common/tile_common.h"

namespace {
TEST(IntrabcTest, DvValidation) {
  struct DvTestCase {
    MV dv;
    int mi_row_offset;
    int mi_col_offset;
    BLOCK_SIZE bsize;
    bool valid;
  };
  const int kSubPelScale = 8;
  const int kTileMaxMibWidth = 8;
  const DvTestCase kDvCases[] = {
    { { 0, 0 }, 0, 0, BLOCK_128X128, false },
    { { 0, 0 }, 0, 0, BLOCK_64X64, false },
    { { 0, 0 }, 0, 0, BLOCK_32X32, false },
    { { 0, 0 }, 0, 0, BLOCK_16X16, false },
    { { 0, 0 }, 0, 0, BLOCK_8X8, false },
    { { 0, 0 }, 0, 0, BLOCK_4X4, false },
    { { -MAX_SB_SIZE * kSubPelScale, -MAX_SB_SIZE * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_16X16,
      true },
    { { 0, -MAX_SB_SIZE * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_16X16,
      false },
    { { -MAX_SB_SIZE * kSubPelScale, 0 },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_16X16,
      true },
    { { MAX_SB_SIZE * kSubPelScale, 0 },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_16X16,
      false },
    { { 0, MAX_SB_SIZE * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_16X16,
      false },
    { { -32 * kSubPelScale, -32 * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_32X32,
      true },
    { { -32 * kSubPelScale, -32 * kSubPelScale },
      32 / MI_SIZE,
      32 / MI_SIZE,
      BLOCK_32X32,
      false },
    { { -32 * kSubPelScale - kSubPelScale / 2, -32 * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_32X32,
#if CONFIG_IBC_SUBPEL_PRECISION
      true },
#else
      false },
#endif  // CONFIG_IBC_SUBPEL_PRECISION
    { { -33 * kSubPelScale, -32 * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_32X32,
      true },
    { { -32 * kSubPelScale, -32 * kSubPelScale - kSubPelScale / 2 },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_32X32,
#if CONFIG_IBC_SUBPEL_PRECISION
      true },
#else
      false },
#endif  // CONFIG_IBC_SUBPEL_PRECISION
    { { -32 * kSubPelScale, -33 * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_32X32,
      true },
    { { -MAX_SB_SIZE * kSubPelScale, -MAX_SB_SIZE * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      true },
    { { -(MAX_SB_SIZE + 1) * kSubPelScale, -MAX_SB_SIZE * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      false },
    { { -MAX_SB_SIZE * kSubPelScale, -(MAX_SB_SIZE + 1) * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      false },
    { { -(MAX_SB_SIZE - 1) * kSubPelScale, -MAX_SB_SIZE * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      false },
    { { -MAX_SB_SIZE * kSubPelScale, -(MAX_SB_SIZE - 1) * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      true },
    { { -(MAX_SB_SIZE - 1) * kSubPelScale, -(MAX_SB_SIZE - 1) * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      false },
    { { -MAX_SB_SIZE * kSubPelScale, MAX_SB_SIZE * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      false },
    { { -MAX_SB_SIZE * kSubPelScale,
        (kTileMaxMibWidth - 2) * MAX_SB_SIZE * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      false },
    { { -MAX_SB_SIZE * kSubPelScale,
        ((kTileMaxMibWidth - 2) * MAX_SB_SIZE + 1) * kSubPelScale },
      MAX_SB_SIZE / MI_SIZE,
      MAX_SB_SIZE / MI_SIZE,
      BLOCK_LARGEST,
      false },
  };

  auto xd = reinterpret_cast<MACROBLOCKD *>(
      aom_memalign(alignof(MACROBLOCKD), sizeof(MACROBLOCKD)));
  ASSERT_NE(xd, nullptr);
  memset(xd, 0, sizeof(*xd));
  xd->tile.mi_row_start = 8 * MAX_MIB_SIZE;
  xd->tile.mi_row_end = 16 * MAX_MIB_SIZE;
  xd->tile.mi_col_start = 24 * MAX_MIB_SIZE;
  xd->tile.mi_col_end = xd->tile.mi_col_start + kTileMaxMibWidth * MAX_MIB_SIZE;
  xd->plane[1].subsampling_x = 1;
  xd->plane[1].subsampling_y = 1;
  xd->plane[2].subsampling_x = 1;
  xd->plane[2].subsampling_y = 1;
  xd->mi = NULL;

  auto cm = reinterpret_cast<AV1_COMMON *>(
      aom_memalign(alignof(AV1_COMMON), sizeof(AV1_COMMON)));
  ASSERT_NE(cm, nullptr);
  memset(cm, 0, sizeof(*cm));
#if CONFIG_IBC_SR_EXT
  cm->features.allow_global_intrabc = 1;
#endif  // CONFIG_IBC_SR_EXT

  for (const DvTestCase &dv_case : kDvCases) {
    const int mi_row = xd->tile.mi_row_start + dv_case.mi_row_offset;
    const int mi_col = xd->tile.mi_col_start + dv_case.mi_col_offset;
    xd->is_chroma_ref = 1;
    EXPECT_EQ(static_cast<int>(dv_case.valid),
              av1_is_dv_valid(dv_case.dv, cm, xd, mi_row, mi_col, dv_case.bsize,
                              MAX_MIB_SIZE_LOG2));
  }

  aom_free(xd);
  aom_free(cm);
}
}  // namespace