1/* 2 * Copyright (c) 2012 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10#include <cmath> 11#include <map> 12#include "third_party/googletest/src/include/gtest/gtest.h" 13#include "test/codec_factory.h" 14#include "test/encode_test_driver.h" 15#include "test/i420_video_source.h" 16#include "test/util.h" 17 18namespace { 19 20// CQ level range: [kCQLevelMin, kCQLevelMax). 21const int kCQLevelMin = 4; 22const int kCQLevelMax = 63; 23const int kCQLevelStep = 8; 24const unsigned int kCQTargetBitrate = 2000; 25 26class CQTest : public ::libvpx_test::EncoderTest, 27 public ::libvpx_test::CodecTestWithParam<int> { 28 public: 29 // maps the cqlevel to the bitrate produced. 30 typedef std::map<int, uint32_t> BitrateMap; 31 32 static void SetUpTestCase() { bitrates_.clear(); } 33 34 static void TearDownTestCase() { 35 ASSERT_TRUE(!HasFailure()) 36 << "skipping bitrate validation due to earlier failure."; 37 uint32_t prev_actual_bitrate = kCQTargetBitrate; 38 for (BitrateMap::const_iterator iter = bitrates_.begin(); 39 iter != bitrates_.end(); ++iter) { 40 const uint32_t cq_actual_bitrate = iter->second; 41 EXPECT_LE(cq_actual_bitrate, prev_actual_bitrate) 42 << "cq_level: " << iter->first 43 << ", bitrate should decrease with increase in CQ level."; 44 prev_actual_bitrate = cq_actual_bitrate; 45 } 46 } 47 48 protected: 49 CQTest() : EncoderTest(GET_PARAM(0)), cq_level_(GET_PARAM(1)) { 50 init_flags_ = VPX_CODEC_USE_PSNR; 51 } 52 53 virtual ~CQTest() {} 54 55 virtual void SetUp() { 56 InitializeConfig(); 57 SetMode(libvpx_test::kTwoPassGood); 58 } 59 60 virtual void BeginPassHook(unsigned int /*pass*/) { 61 file_size_ = 0; 62 psnr_ = 0.0; 63 n_frames_ = 0; 64 } 65 66 virtual void PreEncodeFrameHook(libvpx_test::VideoSource *video, 67 libvpx_test::Encoder *encoder) { 68 if (video->frame() == 1) { 69 if (cfg_.rc_end_usage == VPX_CQ) { 70 encoder->Control(VP8E_SET_CQ_LEVEL, cq_level_); 71 } 72 encoder->Control(VP8E_SET_CPUUSED, 3); 73 } 74 } 75 76 virtual void PSNRPktHook(const vpx_codec_cx_pkt_t *pkt) { 77 psnr_ += pow(10.0, pkt->data.psnr.psnr[0] / 10.0); 78 n_frames_++; 79 } 80 81 virtual void FramePktHook(const vpx_codec_cx_pkt_t *pkt) { 82 file_size_ += pkt->data.frame.sz; 83 } 84 85 double GetLinearPSNROverBitrate() const { 86 double avg_psnr = log10(psnr_ / n_frames_) * 10.0; 87 return pow(10.0, avg_psnr / 10.0) / file_size_; 88 } 89 90 int cq_level() const { return cq_level_; } 91 size_t file_size() const { return file_size_; } 92 int n_frames() const { return n_frames_; } 93 94 static BitrateMap bitrates_; 95 96 private: 97 int cq_level_; 98 size_t file_size_; 99 double psnr_; 100 int n_frames_; 101}; 102 103CQTest::BitrateMap CQTest::bitrates_; 104 105TEST_P(CQTest, LinearPSNRIsHigherForCQLevel) { 106 const vpx_rational timebase = { 33333333, 1000000000 }; 107 cfg_.g_timebase = timebase; 108 cfg_.rc_target_bitrate = kCQTargetBitrate; 109 cfg_.g_lag_in_frames = 25; 110 111 cfg_.rc_end_usage = VPX_CQ; 112 libvpx_test::I420VideoSource video("hantro_collage_w352h288.yuv", 352, 288, 113 timebase.den, timebase.num, 0, 30); 114 ASSERT_NO_FATAL_FAILURE(RunLoop(&video)); 115 const double cq_psnr_lin = GetLinearPSNROverBitrate(); 116 const unsigned int cq_actual_bitrate = 117 static_cast<unsigned int>(file_size()) * 8 * 30 / (n_frames() * 1000); 118 EXPECT_LE(cq_actual_bitrate, kCQTargetBitrate); 119 bitrates_[cq_level()] = cq_actual_bitrate; 120 121 // try targeting the approximate same bitrate with VBR mode 122 cfg_.rc_end_usage = VPX_VBR; 123 cfg_.rc_target_bitrate = cq_actual_bitrate; 124 ASSERT_NO_FATAL_FAILURE(RunLoop(&video)); 125 const double vbr_psnr_lin = GetLinearPSNROverBitrate(); 126 EXPECT_GE(cq_psnr_lin, vbr_psnr_lin); 127} 128 129VP8_INSTANTIATE_TEST_CASE(CQTest, ::testing::Range(kCQLevelMin, kCQLevelMax, 130 kCQLevelStep)); 131} // namespace 132