/* * 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 "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 int kCQTargetBitrate = 2000; class CQTest : public ::libvpx_test::EncoderTest, public ::libvpx_test::CodecTestWithParam<int> { 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() == 1) { 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 file_size() const { return file_size_; } int n_frames() const { return n_frames_; } private: int cq_level_; int file_size_; double psnr_; int n_frames_; }; int prev_actual_bitrate = kCQTargetBitrate; 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 int cq_actual_bitrate = file_size() * 8 * 30 / (n_frames() * 1000); EXPECT_LE(cq_actual_bitrate, kCQTargetBitrate); EXPECT_LE(cq_actual_bitrate, prev_actual_bitrate); prev_actual_bitrate = 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_CASE(CQTest, ::testing::Range(kCQLevelMin, kCQLevelMax, kCQLevelStep)); } // namespace