135 строки
4.1 KiB
C++
135 строки
4.1 KiB
C++
/*
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* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <cmath>
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#include <map>
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#include "third_party/googletest/src/include/gtest/gtest.h"
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#include "test/codec_factory.h"
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#include "test/encode_test_driver.h"
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#include "test/i420_video_source.h"
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#include "test/util.h"
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namespace {
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// CQ level range: [kCQLevelMin, kCQLevelMax).
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const int kCQLevelMin = 4;
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const int kCQLevelMax = 63;
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const int kCQLevelStep = 8;
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const unsigned int kCQTargetBitrate = 2000;
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class CQTest : public ::libvpx_test::EncoderTest,
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public ::libvpx_test::CodecTestWithParam<int> {
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public:
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// maps the cqlevel to the bitrate produced.
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typedef std::map<int, uint32_t> BitrateMap;
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static void SetUpTestCase() {
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bitrates_.clear();
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}
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static void TearDownTestCase() {
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ASSERT_TRUE(!HasFailure())
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<< "skipping bitrate validation due to earlier failure.";
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uint32_t prev_actual_bitrate = kCQTargetBitrate;
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for (BitrateMap::const_iterator iter = bitrates_.begin();
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iter != bitrates_.end(); ++iter) {
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const uint32_t cq_actual_bitrate = iter->second;
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EXPECT_LE(cq_actual_bitrate, prev_actual_bitrate)
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<< "cq_level: " << iter->first
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<< ", bitrate should decrease with increase in CQ level.";
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prev_actual_bitrate = cq_actual_bitrate;
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}
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}
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protected:
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CQTest() : EncoderTest(GET_PARAM(0)), cq_level_(GET_PARAM(1)) {
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init_flags_ = VPX_CODEC_USE_PSNR;
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}
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virtual ~CQTest() {}
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virtual void SetUp() {
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InitializeConfig();
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SetMode(libvpx_test::kTwoPassGood);
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}
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virtual void BeginPassHook(unsigned int /*pass*/) {
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file_size_ = 0;
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psnr_ = 0.0;
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n_frames_ = 0;
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}
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virtual void PreEncodeFrameHook(libvpx_test::VideoSource *video,
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libvpx_test::Encoder *encoder) {
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if (video->frame() == 1) {
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if (cfg_.rc_end_usage == VPX_CQ) {
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encoder->Control(VP8E_SET_CQ_LEVEL, cq_level_);
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}
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encoder->Control(VP8E_SET_CPUUSED, 3);
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}
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}
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virtual void PSNRPktHook(const vpx_codec_cx_pkt_t *pkt) {
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psnr_ += pow(10.0, pkt->data.psnr.psnr[0] / 10.0);
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n_frames_++;
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}
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virtual void FramePktHook(const vpx_codec_cx_pkt_t *pkt) {
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file_size_ += pkt->data.frame.sz;
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}
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double GetLinearPSNROverBitrate() const {
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double avg_psnr = log10(psnr_ / n_frames_) * 10.0;
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return pow(10.0, avg_psnr / 10.0) / file_size_;
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}
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int cq_level() const { return cq_level_; }
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size_t file_size() const { return file_size_; }
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int n_frames() const { return n_frames_; }
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static BitrateMap bitrates_;
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private:
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int cq_level_;
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size_t file_size_;
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double psnr_;
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int n_frames_;
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};
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CQTest::BitrateMap CQTest::bitrates_;
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TEST_P(CQTest, LinearPSNRIsHigherForCQLevel) {
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const vpx_rational timebase = { 33333333, 1000000000 };
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cfg_.g_timebase = timebase;
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cfg_.rc_target_bitrate = kCQTargetBitrate;
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cfg_.g_lag_in_frames = 25;
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cfg_.rc_end_usage = VPX_CQ;
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libvpx_test::I420VideoSource video("hantro_collage_w352h288.yuv", 352, 288,
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timebase.den, timebase.num, 0, 30);
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ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
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const double cq_psnr_lin = GetLinearPSNROverBitrate();
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const unsigned int cq_actual_bitrate =
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static_cast<unsigned int>(file_size()) * 8 * 30 / (n_frames() * 1000);
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EXPECT_LE(cq_actual_bitrate, kCQTargetBitrate);
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bitrates_[cq_level()] = cq_actual_bitrate;
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// try targeting the approximate same bitrate with VBR mode
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cfg_.rc_end_usage = VPX_VBR;
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cfg_.rc_target_bitrate = cq_actual_bitrate;
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ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
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const double vbr_psnr_lin = GetLinearPSNROverBitrate();
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EXPECT_GE(cq_psnr_lin, vbr_psnr_lin);
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}
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VP8_INSTANTIATE_TEST_CASE(CQTest,
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::testing::Range(kCQLevelMin, kCQLevelMax,
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kCQLevelStep));
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} // namespace
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