Add a unit test for CQ mode.
Change-Id: I66c391987eabc5ea0159bf4a2a4fd8e8e163872f
diff --git a/test/cq_test.cc b/test/cq_test.cc
new file mode 100644
index 0000000..42ee2a2
--- /dev/null
+++ b/test/cq_test.cc
@@ -0,0 +1,106 @@
+/*
+ * 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/encode_test_driver.h"
+#include "test/i420_video_source.h"
+
+// CQ level range: [kCQLevelMin, kCQLevelMax).
+const int kCQLevelMin = 4;
+const int kCQLevelMax = 63;
+const int kCQLevelStep = 8;
+const int kCQTargetBitrate = 2000;
+
+namespace {
+
+class CQTest : public libvpx_test::EncoderTest,
+ public ::testing::TestWithParam<int> {
+ protected:
+ CQTest() : cq_level_(GetParam()) { 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 bool Continue() const {
+ return !HasFatalFailure() && !abort_;
+ }
+
+ 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);
+}
+
+INSTANTIATE_TEST_CASE_P(CQLevelRange, CQTest,
+ ::testing::Range(kCQLevelMin, kCQLevelMax,
+ kCQLevelStep));
+} // namespace
diff --git a/test/test.mk b/test/test.mk
index 0dfbdbe..fc4fa07 100644
--- a/test/test.mk
+++ b/test/test.mk
@@ -10,6 +10,7 @@
##
LIBVPX_TEST_SRCS-$(CONFIG_VP8_ENCODER) += altref_test.cc
LIBVPX_TEST_SRCS-$(CONFIG_VP8_ENCODER) += config_test.cc
+LIBVPX_TEST_SRCS-$(CONFIG_VP8_ENCODER) += cq_test.cc
LIBVPX_TEST_SRCS-$(CONFIG_VP8_ENCODER) += encode_test_driver.cc
LIBVPX_TEST_SRCS-$(CONFIG_VP8_ENCODER) += encode_test_driver.h
LIBVPX_TEST_SRCS-$(CONFIG_VP8_ENCODER) += i420_video_source.h
