/*
 * Copyright (c) 2019, 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 "third_party/googletest/src/googletest/include/gtest/gtest.h"
#include "test/codec_factory.h"
#include "test/encode_test_driver.h"
#include "test/i420_video_source.h"
#include "test/util.h"

namespace {

static const struct GFMaxPyrHeightTestParam {
  int gf_max_pyr_height;
  double psnr_thresh;
} kTestParams[] = {
  { 0, 34.75 }, { 1, 34.75 }, { 2, 35.25 }, { 3, 35.50 }, { 4, 35.50 },
};

// Compiler may decide to add some padding to the struct above for alignment,
// which the gtest may try to print (on error for example). This would cause
// valgrind to complain that the padding is uninitialized. To avoid that, we
// provide our own function to print the struct.
// This also makes '--gtest_list_tests' output more understandable.
std::ostream &operator<<(std::ostream &os, const GFMaxPyrHeightTestParam &p) {
  os << "GFMaxPyrHeightTestParam { "
     << "gf_max_pyr_height = " << p.gf_max_pyr_height << ", "
     << "psnr_thresh = " << p.psnr_thresh << " }";
  return os;
}

// Params: encoding mode and GFMaxPyrHeightTestParam object.
class GFMaxPyrHeightTest
    : public ::libaom_test::CodecTestWith2Params<libaom_test::TestMode,
                                                 GFMaxPyrHeightTestParam>,
      public ::libaom_test::EncoderTest {
 protected:
  GFMaxPyrHeightTest()
      : EncoderTest(GET_PARAM(0)), encoding_mode_(GET_PARAM(1)) {
    gf_max_pyr_height_ = GET_PARAM(2).gf_max_pyr_height;
    psnr_threshold_ = GET_PARAM(2).psnr_thresh;
  }
  virtual ~GFMaxPyrHeightTest() {}

  virtual void SetUp() {
    InitializeConfig();
    SetMode(encoding_mode_);
    const aom_rational timebase = { 1, 30 };
    cfg_.g_timebase = timebase;
    cpu_used_ = 4;
    cfg_.rc_end_usage = AOM_VBR;
    cfg_.rc_target_bitrate = 200;
    cfg_.g_lag_in_frames = 19;
    cfg_.g_threads = 0;
    init_flags_ = AOM_CODEC_USE_PSNR;
  }

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

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

  virtual void PreEncodeFrameHook(::libaom_test::VideoSource *video,
                                  ::libaom_test::Encoder *encoder) {
    if (video->frame() == 0) {
      encoder->Control(AOME_SET_CPUUSED, cpu_used_);
      if (encoding_mode_ != ::libaom_test::kRealTime) {
        encoder->Control(AOME_SET_ENABLEAUTOALTREF, 1);
        encoder->Control(AOME_SET_ARNR_MAXFRAMES, 7);
        encoder->Control(AOME_SET_ARNR_STRENGTH, 5);
      }
      encoder->Control(AV1E_SET_GF_MAX_PYRAMID_HEIGHT, gf_max_pyr_height_);
    }
  }

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

  double GetPsnrThreshold() { return psnr_threshold_; }

  ::libaom_test::TestMode encoding_mode_;
  double psnr_threshold_;
  int gf_max_pyr_height_;
  int cpu_used_;
  int nframes_;
  double psnr_;
};

TEST_P(GFMaxPyrHeightTest, EncodeAndVerifyPSNR) {
  libaom_test::I420VideoSource video("hantro_collage_w352h288.yuv", 352, 288,
                                     cfg_.g_timebase.den, cfg_.g_timebase.num,
                                     0, 32);
  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
  EXPECT_GT(GetAveragePsnr(), GetPsnrThreshold())
      << "GF Max Pyramid Height = " << gf_max_pyr_height_;
}

AV1_INSTANTIATE_TEST_CASE(GFMaxPyrHeightTest,
                          ::testing::Values(::libaom_test::kTwoPassGood),
                          ::testing::ValuesIn(kTestParams));
}  // namespace