/*
 *  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.
 */

#include "./vpx_config.h"
#include "./vp8_rtcd.h"
#include "test/clear_system_state.h"
#include "test/register_state_check.h"
#include "third_party/googletest/src/include/gtest/gtest.h"

#include "vpx/vpx_integer.h"

typedef void (*idct_fn_t)(int16_t *input, unsigned char *pred_ptr,
                          int pred_stride, unsigned char *dst_ptr,
                          int dst_stride);
namespace {
class IDCTTest : public ::testing::TestWithParam<idct_fn_t> {
 protected:
  virtual void SetUp() {
    int i;

    UUT = GetParam();
    memset(input, 0, sizeof(input));
    /* Set up guard blocks */
    for (i = 0; i < 256; i++) output[i] = ((i & 0xF) < 4 && (i < 64)) ? 0 : -1;
  }

  virtual void TearDown() { libvpx_test::ClearSystemState(); }

  idct_fn_t UUT;
  int16_t input[16];
  unsigned char output[256];
  unsigned char predict[256];
};

TEST_P(IDCTTest, TestGuardBlocks) {
  int i;

  for (i = 0; i < 256; i++)
    if ((i & 0xF) < 4 && i < 64)
      EXPECT_EQ(0, output[i]) << i;
    else
      EXPECT_EQ(255, output[i]);
}

TEST_P(IDCTTest, TestAllZeros) {
  int i;

  REGISTER_STATE_CHECK(UUT(input, output, 16, output, 16));

  for (i = 0; i < 256; i++)
    if ((i & 0xF) < 4 && i < 64)
      EXPECT_EQ(0, output[i]) << "i==" << i;
    else
      EXPECT_EQ(255, output[i]) << "i==" << i;
}

TEST_P(IDCTTest, TestAllOnes) {
  int i;

  input[0] = 4;
  REGISTER_STATE_CHECK(UUT(input, output, 16, output, 16));

  for (i = 0; i < 256; i++)
    if ((i & 0xF) < 4 && i < 64)
      EXPECT_EQ(1, output[i]) << "i==" << i;
    else
      EXPECT_EQ(255, output[i]) << "i==" << i;
}

TEST_P(IDCTTest, TestAddOne) {
  int i;

  for (i = 0; i < 256; i++) predict[i] = i;
  input[0] = 4;
  REGISTER_STATE_CHECK(UUT(input, predict, 16, output, 16));

  for (i = 0; i < 256; i++)
    if ((i & 0xF) < 4 && i < 64)
      EXPECT_EQ(i + 1, output[i]) << "i==" << i;
    else
      EXPECT_EQ(255, output[i]) << "i==" << i;
}

TEST_P(IDCTTest, TestWithData) {
  int i;

  for (i = 0; i < 16; i++) input[i] = i;

  REGISTER_STATE_CHECK(UUT(input, output, 16, output, 16));

  for (i = 0; i < 256; i++)
    if ((i & 0xF) > 3 || i > 63)
      EXPECT_EQ(255, output[i]) << "i==" << i;
    else if (i == 0)
      EXPECT_EQ(11, output[i]) << "i==" << i;
    else if (i == 34)
      EXPECT_EQ(1, output[i]) << "i==" << i;
    else if (i == 2 || i == 17 || i == 32)
      EXPECT_EQ(3, output[i]) << "i==" << i;
    else
      EXPECT_EQ(0, output[i]) << "i==" << i;
}

INSTANTIATE_TEST_CASE_P(C, IDCTTest, ::testing::Values(vp8_short_idct4x4llm_c));
#if HAVE_MMX
INSTANTIATE_TEST_CASE_P(MMX, IDCTTest,
                        ::testing::Values(vp8_short_idct4x4llm_mmx));
#endif
}