text: /*
   * 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 "config/aom_config.h"
  
  #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"
  #include "test/y4m_video_source.h"
  #include "aom/aom_codec.h"
  
  namespace datarate_test {
  namespace {
  class DatarateTest : public ::libaom_test::EncoderTest {
   public:
    explicit DatarateTest(const ::libaom_test::CodecFactory *codec)
        : EncoderTest(codec) {}
  
   protected:
    virtual ~DatarateTest() {}
  
    virtual void SetUp() {
      InitializeConfig();
      ResetModel();
    }
  
    virtual void ResetModel() {
      last_pts_ = 0;
      bits_in_buffer_model_ = cfg_.rc_target_bitrate * cfg_.rc_buf_initial_sz;
      frame_number_ = 0;
      tot_frame_number_ = 0;
      first_drop_ = 0;
      num_drops_ = 0;
      // Denoiser is off by default.
      denoiser_on_ = 0;
      bits_total_ = 0;
      denoiser_offon_test_ = 0;
      denoiser_offon_period_ = -1;
    }
  
    virtual void PreEncodeFrameHook(::libaom_test::VideoSource *video,
                                    ::libaom_test::Encoder *encoder) {
      if (video->frame() == 0) {
        encoder->Control(AOME_SET_CPUUSED, set_cpu_used_);
        encoder->Control(AV1E_SET_AQ_MODE, aq_mode_);
        if (cfg_.g_usage == AOM_USAGE_REALTIME) {
          encoder->Control(AV1E_SET_DELTAQ_MODE, 0);
          encoder->Control(AV1E_SET_ENABLE_TPL_MODEL, 0);
          encoder->Control(AV1E_SET_ENABLE_CDEF, 1);
          encoder->Control(AV1E_SET_COEFF_COST_UPD_FREQ, 2);
          encoder->Control(AV1E_SET_MODE_COST_UPD_FREQ, 2);
          encoder->Control(AV1E_SET_MV_COST_UPD_FREQ, 2);
        }
      }
  
      if (denoiser_offon_test_) {
        ASSERT_GT(denoiser_offon_period_, 0)
            << "denoiser_offon_period_ is not positive.";
        if ((video->frame() + 1) % denoiser_offon_period_ == 0) {
          // Flip denoiser_on_ periodically
          denoiser_on_ ^= 1;
        }
      }
  
      encoder->Control(AV1E_SET_NOISE_SENSITIVITY, denoiser_on_);
  
      const aom_rational_t tb = video->timebase();
      timebase_ = static_cast<double>(tb.num) / tb.den;
      duration_ = 0;
    }
  
    virtual void FramePktHook(const aom_codec_cx_pkt_t *pkt) {
      // Time since last timestamp = duration.
      aom_codec_pts_t duration = pkt->data.frame.pts - last_pts_;
  
      if (duration > 1) {
        // If first drop not set and we have a drop set it to this time.
        if (!first_drop_) first_drop_ = last_pts_ + 1;
        // Update the number of frame drops.
        num_drops_ += static_cast<int>(duration - 1);
        // Update counter for total number of frames (#frames input to encoder).
        // Needed for setting the proper layer_id below.
        tot_frame_number_ += static_cast<int>(duration - 1);
      }
  
      // Add to the buffer the bits we'd expect from a constant bitrate server.
      bits_in_buffer_model_ += static_cast<int64_t>(
          duration * timebase_ * cfg_.rc_target_bitrate * 1000);
  
      // Buffer should not go negative.
      ASSERT_GE(bits_in_buffer_model_, 0)
          << "Buffer Underrun at frame " << pkt->data.frame.pts;
  
      const size_t frame_size_in_bits = pkt->data.frame.sz * 8;
  
      // Update the total encoded bits.
      bits_total_ += frame_size_in_bits;
  
      // Update the most recent pts.
      last_pts_ = pkt->data.frame.pts;
      ++frame_number_;
      ++tot_frame_number_;
    }
  
    virtual void EndPassHook(void) {
      duration_ = (last_pts_ + 1) * timebase_;
      // Effective file datarate:
      effective_datarate_ = (bits_total_ / 1000.0) / duration_;
    }
  
    aom_codec_pts_t last_pts_;
    double timebase_;
    int frame_number_;      // Counter for number of non-dropped/encoded frames.
    int tot_frame_number_;  // Counter for total number of input frames.
    int64_t bits_total_;
    double duration_;
    double effective_datarate_;
    int set_cpu_used_;
    int64_t bits_in_buffer_model_;
    aom_codec_pts_t first_drop_;
    int num_drops_;
    int denoiser_on_;
    int denoiser_offon_test_;
    int denoiser_offon_period_;
    unsigned int aq_mode_;
  };
  
  }  // namespace
  }  // namespace datarate_test
  