/*
 * Copyright (c) 2016, 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 <memory>
#include <ostream>
#include <unordered_map>

#include "gtest/gtest.h"

#include "test/codec_factory.h"
#include "test/encode_test_driver.h"
#include "test/util.h"
#include "test/y4m_video_source.h"
#include "test/yuv_video_source.h"

namespace {

const unsigned int kWidth = 160;
const unsigned int kHeight = 90;
const unsigned int kFramerate = 50;
const unsigned int kFrames = 10;
const int kBitrate = 500;
const unsigned int kCqLevel = 18;
// List of psnr thresholds for speed settings 0-8 and 4 encoding modes
const double kPsnrThreshold[][4] = {
  { 34.9, 44.4, 39.5, 41.9 }, { 34.9, 44.4, 39.5, 41.9 },
  { 34.9, 44.4, 39.4, 41.9 }, { 34.9, 44.4, 39.1, 41.8 },
  { 34.9, 44.4, 39.1, 41.8 }, { 34.9, 44.29, 38.5, 41.8 },
  { 34.9, 44.3, 38.5, 41.3 }, { 34.9, 44.3, 38.5, 40.8 },
  { 34.9, 44.3, 38.5, 40.8 }
};

struct TestVideoParam {
  const char *filename;
  unsigned int input_bit_depth;
  aom_img_fmt fmt;
  aom_bit_depth_t bit_depth;
  unsigned int profile;
};

std::ostream &operator<<(std::ostream &os, const TestVideoParam &test_arg) {
  return os << "TestVideoParam { filename:" << test_arg.filename
            << " input_bit_depth:" << test_arg.input_bit_depth
            << " fmt:" << test_arg.fmt << " bit_depth:" << test_arg.bit_depth
            << " profile:" << test_arg.profile << " }";
}

const TestVideoParam kTestVectors[] = {
  { "park_joy_90p_8_420.y4m", 8, AOM_IMG_FMT_I420, AOM_BITS_8, 0 },
  { "park_joy_90p_8_422.y4m", 8, AOM_IMG_FMT_I422, AOM_BITS_8, 2 },
  { "park_joy_90p_8_444.y4m", 8, AOM_IMG_FMT_I444, AOM_BITS_8, 1 },
#if CONFIG_AV1_HIGHBITDEPTH
  { "park_joy_90p_10_420.y4m", 10, AOM_IMG_FMT_I42016, AOM_BITS_10, 0 },
  { "park_joy_90p_10_422.y4m", 10, AOM_IMG_FMT_I42216, AOM_BITS_10, 2 },
  { "park_joy_90p_10_444.y4m", 10, AOM_IMG_FMT_I44416, AOM_BITS_10, 1 },
  { "park_joy_90p_12_420.y4m", 12, AOM_IMG_FMT_I42016, AOM_BITS_12, 2 },
  { "park_joy_90p_12_422.y4m", 12, AOM_IMG_FMT_I42216, AOM_BITS_12, 2 },
  { "park_joy_90p_12_444.y4m", 12, AOM_IMG_FMT_I44416, AOM_BITS_12, 2 },
#endif
};

// List of psnr thresholds for speed settings 1-3 and low complexity decode mode
// keys: content -> speed -> PSNR threshold
std::unordered_map<std::string, std::unordered_map<int, double>>
    kPsnrThresholdLcMode = { { "SDR_Animal_oqo7.y4m",
                               {
                                   { 1, 27.9 },
                                   { 2, 27.8 },
                                   { 3, 27.3 },
                               } },
                             { "SDR_Health_rtd0_720p.y4m",
                               {
                                   { 1, 41.8 },
                                   { 2, 41.4 },
                                   { 3, 41.1 },
                               } } };

// Encoding modes tested
const libaom_test::TestMode kEncodingModeVectors[] = {
  ::libaom_test::kTwoPassGood,
  ::libaom_test::kOnePassGood,
  ::libaom_test::kRealTime,
};

const TestVideoParam kTestVectorsLcMode[] = {
  { "SDR_Animal_oqo7.y4m", 8, AOM_IMG_FMT_I420, AOM_BITS_8, 0 },
  { "SDR_Health_rtd0_720p.y4m", 8, AOM_IMG_FMT_I420, AOM_BITS_8, 0 },
};

// Speed settings tested
const int kCpuUsedVectors[] = { 1, 2, 3, 5, 6 };

class EndToEndTest
    : public ::libaom_test::CodecTestWith3Params<libaom_test::TestMode,
                                                 TestVideoParam, int>,
      public ::libaom_test::EncoderTest {
 protected:
  EndToEndTest()
      : EncoderTest(GET_PARAM(0)), test_video_param_(GET_PARAM(2)),
        cpu_used_(GET_PARAM(3)), psnr_(0.0), nframes_(0),
        encoding_mode_(GET_PARAM(1)) {}

  ~EndToEndTest() override = default;

  void SetUp() override {
    InitializeConfig(encoding_mode_);
    if (encoding_mode_ == ::libaom_test::kOnePassGood ||
        encoding_mode_ == ::libaom_test::kTwoPassGood ||
        encoding_mode_ == ::libaom_test::kLowComplexityDecode) {
      cfg_.g_lag_in_frames = 5;
    } else if (encoding_mode_ == ::libaom_test::kRealTime) {
      cfg_.rc_buf_sz = 1000;
      cfg_.rc_buf_initial_sz = 500;
      cfg_.rc_buf_optimal_sz = 600;
    }
  }

  void BeginPassHook(unsigned int) override {
    psnr_ = 0.0;
    nframes_ = 0;
  }

  void PSNRPktHook(const aom_codec_cx_pkt_t *pkt) override {
    psnr_ += pkt->data.psnr.psnr[0];
    nframes_++;
  }

  void PreEncodeFrameHook(::libaom_test::VideoSource *video,
                          ::libaom_test::Encoder *encoder) override {
    if (video->frame() == 0) {
      if (encoding_mode_ == ::libaom_test::kLowComplexityDecode) {
        ASSERT_LE(cpu_used_, 3);
        encoder->Control(AV1E_SET_TILE_COLUMNS, 1);
        encoder->Control(AV1E_SET_TILE_ROWS, 1);
        encoder->Control(AV1E_SET_ENABLE_CDEF, 0);
        encoder->Control(AV1E_SET_ENABLE_LOW_COMPLEXITY_DECODE, 1);
      } else {
        encoder->Control(AV1E_SET_FRAME_PARALLEL_DECODING, 1);
        encoder->Control(AV1E_SET_TILE_COLUMNS, 4);
      }
      encoder->Control(AOME_SET_CPUUSED, cpu_used_);
      // Test screen coding tools at cpu_used = 1 && encoding mode is two-pass.
      if (cpu_used_ == 1 && encoding_mode_ == ::libaom_test::kTwoPassGood)
        encoder->Control(AV1E_SET_TUNE_CONTENT, AOM_CONTENT_SCREEN);
      else
        encoder->Control(AV1E_SET_TUNE_CONTENT, AOM_CONTENT_DEFAULT);
      if (encoding_mode_ == ::libaom_test::kOnePassGood ||
          encoding_mode_ == ::libaom_test::kTwoPassGood ||
          encoding_mode_ == ::libaom_test::kLowComplexityDecode) {
        encoder->Control(AOME_SET_ENABLEAUTOALTREF, 1);
        encoder->Control(AOME_SET_ARNR_MAXFRAMES, 7);
        encoder->Control(AOME_SET_ARNR_STRENGTH, 5);
      } else if (encoding_mode_ == ::libaom_test::kAllIntra) {
        encoder->Control(AOME_SET_CQ_LEVEL, kCqLevel);
      }
    }
  }

  double GetAveragePsnr() const {
    if (nframes_) return psnr_ / nframes_;
    return 0.0;
  }

  double GetPsnrThreshold() {
    if (encoding_mode_ == ::libaom_test::kLowComplexityDecode)
      return kPsnrThresholdLcMode[test_video_param_.filename][cpu_used_];
    else
      return kPsnrThreshold[cpu_used_][encoding_mode_];
  }

  void DoTest() {
    cfg_.rc_target_bitrate = kBitrate;
    cfg_.g_error_resilient = 0;
    cfg_.g_profile = test_video_param_.profile;
    cfg_.g_input_bit_depth = test_video_param_.input_bit_depth;
    cfg_.g_bit_depth = test_video_param_.bit_depth;
    init_flags_ = AOM_CODEC_USE_PSNR;
    if (cfg_.g_bit_depth > 8) init_flags_ |= AOM_CODEC_USE_HIGHBITDEPTH;

    std::unique_ptr<libaom_test::VideoSource> video;
    if (is_extension_y4m(test_video_param_.filename)) {
      video.reset(new libaom_test::Y4mVideoSource(test_video_param_.filename, 0,
                                                  kFrames));
    } else {
      video.reset(new libaom_test::YUVVideoSource(
          test_video_param_.filename, test_video_param_.fmt, kWidth, kHeight,
          kFramerate, 1, 0, kFrames));
    }
    ASSERT_NE(video, nullptr);

    ASSERT_NO_FATAL_FAILURE(RunLoop(video.get()));
    const double psnr = GetAveragePsnr();
    EXPECT_GT(psnr, GetPsnrThreshold() * 0.98)
        << "cpu used = " << cpu_used_ << ", encoding mode = " << encoding_mode_;
  }

  TestVideoParam test_video_param_;
  int cpu_used_;

 private:
  double psnr_;
  unsigned int nframes_;
  libaom_test::TestMode encoding_mode_;
};

class EndToEndTestLarge : public EndToEndTest {};

class EndToEndAllIntraTestLarge : public EndToEndTest {};

class EndToEndAllIntraTest : public EndToEndTest {};

class EndToEndLcModeTestLarge : public EndToEndTest {};

class EndToEndLcModeTest : public EndToEndTest {};

TEST_P(EndToEndTestLarge, EndtoEndPSNRTest) { DoTest(); }

TEST_P(EndToEndTest, EndtoEndPSNRTest) { DoTest(); }

TEST_P(EndToEndAllIntraTestLarge, EndtoEndPSNRTest) { DoTest(); }

TEST_P(EndToEndAllIntraTest, EndtoEndPSNRTest) { DoTest(); }

TEST_P(EndToEndLcModeTestLarge, EndtoEndPSNRTest) { DoTest(); }

TEST_P(EndToEndLcModeTest, EndtoEndPSNRTest) { DoTest(); }

AV1_INSTANTIATE_TEST_SUITE(EndToEndTestLarge,
                           ::testing::ValuesIn(kEncodingModeVectors),
                           ::testing::ValuesIn(kTestVectors),
                           ::testing::ValuesIn(kCpuUsedVectors));

AV1_INSTANTIATE_TEST_SUITE(EndToEndTest,
                           ::testing::Values(::libaom_test::kTwoPassGood),
                           ::testing::Values(kTestVectors[2]),  // 444
                           ::testing::Values(3));               // cpu_used

AV1_INSTANTIATE_TEST_SUITE(EndToEndAllIntraTestLarge,
                           ::testing::Values(::libaom_test::kAllIntra),
                           ::testing::ValuesIn(kTestVectors),
                           ::testing::Values(2, 4, 6, 8));  // cpu_used

AV1_INSTANTIATE_TEST_SUITE(EndToEndAllIntraTest,
                           ::testing::Values(::libaom_test::kAllIntra),
                           ::testing::Values(kTestVectors[0]),  // 420
                           ::testing::Values(6));               // cpu_used

AV1_INSTANTIATE_TEST_SUITE(
    EndToEndLcModeTestLarge,
    ::testing::Values(::libaom_test::kLowComplexityDecode),
    ::testing::ValuesIn(kTestVectorsLcMode),
    ::testing::Values(1, 3));  // cpu_used

AV1_INSTANTIATE_TEST_SUITE(
    EndToEndLcModeTest, ::testing::Values(::libaom_test::kLowComplexityDecode),
    ::testing::ValuesIn(kTestVectorsLcMode),
    ::testing::Values(2));  // cpu_used
}  // namespace