/* *  Copyright (c) 2012 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 <cmath>#include <map>#include "third_party/googletest/src/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 { // CQ level range: [kCQLevelMin, kCQLevelMax).const int kCQLevelMin = 4;const int kCQLevelMax = 63;const int kCQLevelStep = 8;const unsigned int kCQTargetBitrate = 2000; class CQTest : public ::libvpx_test::EncoderTest,               public ::libvpx_test::CodecTestWithParam<int> { public:  // maps the cqlevel to the bitrate produced.  typedef std::map<int, uint32_t> BitrateMap;   static void SetUpTestSuite() { bitrates_.clear(); }   static void TearDownTestSuite() {    ASSERT_TRUE(!HasFailure())        << "skipping bitrate validation due to earlier failure.";    uint32_t prev_actual_bitrate = kCQTargetBitrate;    for (BitrateMap::const_iterator iter = bitrates_.begin();         iter != bitrates_.end(); ++iter) {      const uint32_t cq_actual_bitrate = iter->second;      EXPECT_LE(cq_actual_bitrate, prev_actual_bitrate)          << "cq_level: " << iter->first          << ", bitrate should decrease with increase in CQ level.";      prev_actual_bitrate = cq_actual_bitrate;    }  }  protected:  CQTest() : EncoderTest(GET_PARAM(0)), cq_level_(GET_PARAM(1)) {    init_flags_ = VPX_CODEC_USE_PSNR;  }   virtual ~CQTest() {}   virtual void SetUp() {    InitializeConfig();    SetMode(libvpx_test::kTwoPassGood);  }   virtual void BeginPassHook(unsigned int /*pass*/) {    file_size_ = 0;    psnr_ = 0.0;    n_frames_ = 0;  }   virtual void PreEncodeFrameHook(libvpx_test::VideoSource *video,                                  libvpx_test::Encoder *encoder) {    if (video->frame() == 0) {      if (cfg_.rc_end_usage == VPX_CQ) {        encoder->Control(VP8E_SET_CQ_LEVEL, cq_level_);      }      encoder->Control(VP8E_SET_CPUUSED, 3);    }  }   virtual void PSNRPktHook(const vpx_codec_cx_pkt_t *pkt) {    psnr_ += pow(10.0, pkt->data.psnr.psnr[0] / 10.0);    n_frames_++;  }   virtual void FramePktHook(const vpx_codec_cx_pkt_t *pkt) {    file_size_ += pkt->data.frame.sz;  }   double GetLinearPSNROverBitrate() const {    double avg_psnr = log10(psnr_ / n_frames_) * 10.0;    return pow(10.0, avg_psnr / 10.0) / file_size_;  }   int cq_level() const { return cq_level_; }  size_t file_size() const { return file_size_; }  int n_frames() const { return n_frames_; }   static BitrateMap bitrates_;  private:  int cq_level_;  size_t file_size_;  double psnr_;  int n_frames_;}; CQTest::BitrateMap CQTest::bitrates_; TEST_P(CQTest, LinearPSNRIsHigherForCQLevel) {  const vpx_rational timebase = { 33333333, 1000000000 };  cfg_.g_timebase = timebase;  cfg_.rc_target_bitrate = kCQTargetBitrate;  cfg_.g_lag_in_frames = 25;   cfg_.rc_end_usage = VPX_CQ;  libvpx_test::I420VideoSource video("hantro_collage_w352h288.yuv", 352, 288,                                     timebase.den, timebase.num, 0, 30);  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));  const double cq_psnr_lin = GetLinearPSNROverBitrate();  const unsigned int cq_actual_bitrate =      static_cast<unsigned int>(file_size()) * 8 * 30 / (n_frames() * 1000);  EXPECT_LE(cq_actual_bitrate, kCQTargetBitrate);  bitrates_[cq_level()] = cq_actual_bitrate;   // try targeting the approximate same bitrate with VBR mode  cfg_.rc_end_usage = VPX_VBR;  cfg_.rc_target_bitrate = cq_actual_bitrate;  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));  const double vbr_psnr_lin = GetLinearPSNROverBitrate();  EXPECT_GE(cq_psnr_lin, vbr_psnr_lin);} VP8_INSTANTIATE_TEST_SUITE(CQTest, ::testing::Range(kCQLevelMin, kCQLevelMax,                                                    kCQLevelStep));}  // namespace