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/*
* Copyright (c) 2011 The WebRTC 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 "testsupport/metrics/video_metrics.h"
#include "gtest/gtest.h"
#include "testsupport/fileutils.h"
namespace webrtc {
static const char* kEmptyFileName = "video_metrics_unittest_empty_file.tmp";
static const char* kNonExistingFileName = "video_metrics_unittest_non_existing";
static const int kWidth = 352;
static const int kHeight = 288;
static const int kMissingReferenceFileReturnCode = -1;
static const int kMissingTestFileReturnCode = -2;
static const int kEmptyFileReturnCode = -3;
static const double kPsnrPerfectResult = 48.0;
static const double kSsimPerfectResult = 1.0;
class VideoMetricsTest: public testing::Test {
protected:
VideoMetricsTest() {
video_file_ = webrtc::test::ResourcePath("foreman_cif_short", "yuv");
}
virtual ~VideoMetricsTest() {}
void SetUp() {
// Create an empty file:
FILE* dummy = fopen(kEmptyFileName, "wb");
fclose(dummy);
}
void TearDown() {
std::remove(kEmptyFileName);
}
webrtc::test::QualityMetricsResult psnr_result_;
webrtc::test::QualityMetricsResult ssim_result_;
std::string video_file_;
};
// Tests that it is possible to run with the same reference as test file
TEST_F(VideoMetricsTest, ReturnsPerfectResultForIdenticalFilesPSNR) {
EXPECT_EQ(0, I420PSNRFromFiles(video_file_.c_str(), video_file_.c_str(),
kWidth, kHeight, &psnr_result_));
EXPECT_EQ(kPsnrPerfectResult, psnr_result_.average);
}
TEST_F(VideoMetricsTest, ReturnsPerfectResultForIdenticalFilesSSIM) {
EXPECT_EQ(0, I420SSIMFromFiles(video_file_.c_str(), video_file_.c_str(),
kWidth, kHeight, &ssim_result_));
EXPECT_EQ(kSsimPerfectResult, ssim_result_.average);
}
TEST_F(VideoMetricsTest, ReturnsPerfectResultForIdenticalFilesBothMetrics) {
EXPECT_EQ(0, I420MetricsFromFiles(video_file_.c_str(), video_file_.c_str(),
kWidth, kHeight, &psnr_result_,
&ssim_result_));
EXPECT_EQ(kPsnrPerfectResult, psnr_result_.average);
EXPECT_EQ(kSsimPerfectResult, ssim_result_.average);
}
// Tests that the right return code is given when the reference file is missing.
TEST_F(VideoMetricsTest, MissingReferenceFilePSNR) {
EXPECT_EQ(kMissingReferenceFileReturnCode,
I420PSNRFromFiles(kNonExistingFileName, video_file_.c_str(),
kWidth, kHeight, &ssim_result_));
}
TEST_F(VideoMetricsTest, MissingReferenceFileSSIM) {
EXPECT_EQ(kMissingReferenceFileReturnCode,
I420SSIMFromFiles(kNonExistingFileName, video_file_.c_str(),
kWidth, kHeight, &ssim_result_));
}
TEST_F(VideoMetricsTest, MissingReferenceFileBothMetrics) {
EXPECT_EQ(kMissingReferenceFileReturnCode,
I420MetricsFromFiles(kNonExistingFileName, video_file_.c_str(),
kWidth, kHeight,
&psnr_result_, &ssim_result_));
}
// Tests that the right return code is given when the test file is missing.
TEST_F(VideoMetricsTest, MissingTestFilePSNR) {
EXPECT_EQ(kMissingTestFileReturnCode,
I420PSNRFromFiles(video_file_.c_str(), kNonExistingFileName,
kWidth, kHeight, &ssim_result_));
}
TEST_F(VideoMetricsTest, MissingTestFileSSIM) {
EXPECT_EQ(kMissingTestFileReturnCode,
I420SSIMFromFiles(video_file_.c_str(), kNonExistingFileName,
kWidth, kHeight, &ssim_result_));
}
TEST_F(VideoMetricsTest, MissingTestFileBothMetrics) {
EXPECT_EQ(kMissingTestFileReturnCode,
I420MetricsFromFiles(video_file_.c_str(), kNonExistingFileName,
kWidth, kHeight,
&psnr_result_, &ssim_result_));
}
// Tests that the method can be executed with empty files.
TEST_F(VideoMetricsTest, EmptyFilesPSNR) {
EXPECT_EQ(kEmptyFileReturnCode,
I420PSNRFromFiles(kEmptyFileName, video_file_.c_str(),
kWidth, kHeight, &ssim_result_));
EXPECT_EQ(kEmptyFileReturnCode,
I420PSNRFromFiles(video_file_.c_str(), kEmptyFileName,
kWidth, kHeight, &ssim_result_));
}
TEST_F(VideoMetricsTest, EmptyFilesSSIM) {
EXPECT_EQ(kEmptyFileReturnCode,
I420SSIMFromFiles(kEmptyFileName, video_file_.c_str(),
kWidth, kHeight, &ssim_result_));
EXPECT_EQ(kEmptyFileReturnCode,
I420SSIMFromFiles(video_file_.c_str(), kEmptyFileName,
kWidth, kHeight, &ssim_result_));
}
TEST_F(VideoMetricsTest, EmptyFilesBothMetrics) {
EXPECT_EQ(kEmptyFileReturnCode,
I420MetricsFromFiles(kEmptyFileName, video_file_.c_str(),
kWidth, kHeight,
&psnr_result_, &ssim_result_));
EXPECT_EQ(kEmptyFileReturnCode,
I420MetricsFromFiles(video_file_.c_str(), kEmptyFileName,
kWidth, kHeight,
&psnr_result_, &ssim_result_));
}
} // namespace webrtc
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