2 * Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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.
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"
20 // CQ level range: [kCQLevelMin, kCQLevelMax).
21 const int kCQLevelMin = 4;
22 const int kCQLevelMax = 63;
23 const int kCQLevelStep = 8;
24 const unsigned int kCQTargetBitrate = 2000;
26 class CQTest : public ::libvpx_test::EncoderTest,
27 public ::libvpx_test::CodecTestWithParam<int> {
29 // maps the cqlevel to the bitrate produced.
30 typedef std::map<int, uint32_t> BitrateMap;
32 static void SetUpTestCase() {
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;
51 CQTest() : EncoderTest(GET_PARAM(0)), cq_level_(GET_PARAM(1)) {
52 init_flags_ = VPX_CODEC_USE_PSNR;
57 virtual void SetUp() {
59 SetMode(libvpx_test::kTwoPassGood);
62 virtual void BeginPassHook(unsigned int /*pass*/) {
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_);
74 encoder->Control(VP8E_SET_CPUUSED, 3);
78 virtual void PSNRPktHook(const vpx_codec_cx_pkt_t *pkt) {
79 psnr_ += pow(10.0, pkt->data.psnr.psnr[0] / 10.0);
83 virtual void FramePktHook(const vpx_codec_cx_pkt_t *pkt) {
84 file_size_ += pkt->data.frame.sz;
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_;
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_; }
96 static BitrateMap bitrates_;
105 CQTest::BitrateMap CQTest::bitrates_;
107 TEST_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;
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;
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);
131 VP8_INSTANTIATE_TEST_CASE(CQTest,
132 ::testing::Range(kCQLevelMin, kCQLevelMax,