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() { 33 bitrates_.clear(); 34 } 35 36 static void TearDownTestCase() { 37 ASSERT_TRUE(!HasFailure()) 38 << "skipping bitrate validation due to earlier failure."; 39 uint32_t prev_actual_bitrate = kCQTargetBitrate; 40 for (BitrateMap::const_iterator iter = bitrates_.begin(); 41 iter != bitrates_.end(); ++iter) { 42 const uint32_t cq_actual_bitrate = iter->second; 43 EXPECT_LE(cq_actual_bitrate, prev_actual_bitrate) 44 << "cq_level: " << iter->first 45 << ", bitrate should decrease with increase in CQ level."; 46 prev_actual_bitrate = cq_actual_bitrate; 47 } 48 } 49 50 protected: 51 CQTest() : EncoderTest(GET_PARAM(0)), cq_level_(GET_PARAM(1)) { 52 init_flags_ = VPX_CODEC_USE_PSNR; 53 } 54 55 virtual ~CQTest() {} 56 57 virtual void SetUp() { 58 InitializeConfig(); 59 SetMode(libvpx_test::kTwoPassGood); 60 } 61 62 virtual void BeginPassHook(unsigned int /*pass*/) { 63 file_size_ = 0; 64 psnr_ = 0.0; 65 n_frames_ = 0; 66 } 67 68 virtual void PreEncodeFrameHook(libvpx_test::VideoSource *video, 69 libvpx_test::Encoder *encoder) { 70 if (video->frame() == 1) { 71 if (cfg_.rc_end_usage == VPX_CQ) { 72 encoder->Control(VP8E_SET_CQ_LEVEL, cq_level_); 73 } 74 encoder->Control(VP8E_SET_CPUUSED, 3); 75 } 76 } 77 78 virtual void PSNRPktHook(const vpx_codec_cx_pkt_t *pkt) { 79 psnr_ += pow(10.0, pkt->data.psnr.psnr[0] / 10.0); 80 n_frames_++; 81 } 82 83 virtual void FramePktHook(const vpx_codec_cx_pkt_t *pkt) { 84 file_size_ += pkt->data.frame.sz; 85 } 86 87 double GetLinearPSNROverBitrate() const { 88 double avg_psnr = log10(psnr_ / n_frames_) * 10.0; 89 return pow(10.0, avg_psnr / 10.0) / file_size_; 90 } 91 92 int cq_level() const { return cq_level_; } 93 size_t file_size() const { return file_size_; } 94 int n_frames() const { return n_frames_; } 95 96 static BitrateMap bitrates_; 97 98 private: 99 int cq_level_; 100 size_t file_size_; 101 double psnr_; 102 int n_frames_; 103}; 104 105CQTest::BitrateMap CQTest::bitrates_; 106 107TEST_P(CQTest, LinearPSNRIsHigherForCQLevel) { 108 const vpx_rational timebase = { 33333333, 1000000000 }; 109 cfg_.g_timebase = timebase; 110 cfg_.rc_target_bitrate = kCQTargetBitrate; 111 cfg_.g_lag_in_frames = 25; 112 113 cfg_.rc_end_usage = VPX_CQ; 114 libvpx_test::I420VideoSource video("hantro_collage_w352h288.yuv", 352, 288, 115 timebase.den, timebase.num, 0, 30); 116 ASSERT_NO_FATAL_FAILURE(RunLoop(&video)); 117 const double cq_psnr_lin = GetLinearPSNROverBitrate(); 118 const unsigned int cq_actual_bitrate = 119 static_cast<unsigned int>(file_size()) * 8 * 30 / (n_frames() * 1000); 120 EXPECT_LE(cq_actual_bitrate, kCQTargetBitrate); 121 bitrates_[cq_level()] = cq_actual_bitrate; 122 123 // try targeting the approximate same bitrate with VBR mode 124 cfg_.rc_end_usage = VPX_VBR; 125 cfg_.rc_target_bitrate = cq_actual_bitrate; 126 ASSERT_NO_FATAL_FAILURE(RunLoop(&video)); 127 const double vbr_psnr_lin = GetLinearPSNROverBitrate(); 128 EXPECT_GE(cq_psnr_lin, vbr_psnr_lin); 129} 130 131VP8_INSTANTIATE_TEST_CASE(CQTest, 132 ::testing::Range(kCQLevelMin, kCQLevelMax, 133 kCQLevelStep)); 134} // namespace 135