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/*
* Copyright (c) 2012 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.
*/
#ifndef RTC_TOOLS_FRAME_ANALYZER_VIDEO_QUALITY_ANALYSIS_H_
#define RTC_TOOLS_FRAME_ANALYZER_VIDEO_QUALITY_ANALYSIS_H_
#include <stdio.h>
#include <string>
#include <vector>
#include "api/scoped_refptr.h"
#include "api/test/metrics/metrics_logger.h"
#include "api/video/video_frame_buffer.h"
#include "rtc_tools/video_file_reader.h"
namespace webrtc {
namespace test {
struct AnalysisResult {
AnalysisResult() {}
AnalysisResult(int frame_number, double psnr_value, double ssim_value)
: frame_number(frame_number),
psnr_value(psnr_value),
ssim_value(ssim_value) {}
int frame_number;
double psnr_value;
double ssim_value;
};
struct ResultsContainer {
ResultsContainer();
~ResultsContainer();
std::vector<AnalysisResult> frames;
int max_repeated_frames = 0;
int max_skipped_frames = 0;
int total_skipped_frames = 0;
int decode_errors_ref = 0;
int decode_errors_test = 0;
};
// A function to run the PSNR and SSIM analysis on the test file. The test file
// comprises the frames that were captured during the quality measurement test.
// There may be missing or duplicate frames. Also the frames start at a random
// position in the original video. We also need to provide a map from test frame
// indices to reference frame indices.
std::vector<AnalysisResult> RunAnalysis(
const rtc::scoped_refptr<webrtc::test::Video>& reference_video,
const rtc::scoped_refptr<webrtc::test::Video>& test_video,
const std::vector<size_t>& test_frame_indices);
// Compute PSNR for an I420 buffer (all planes). The max return value (in the
// case where the test and reference frames are exactly the same) will be 48.
double Psnr(const rtc::scoped_refptr<I420BufferInterface>& ref_buffer,
const rtc::scoped_refptr<I420BufferInterface>& test_buffer);
// Compute SSIM for an I420 buffer (all planes). The max return value (in the
// case where the test and reference frames are exactly the same) will be 1.
double Ssim(const rtc::scoped_refptr<I420BufferInterface>& ref_buffer,
const rtc::scoped_refptr<I420BufferInterface>& test_buffer);
// Prints the result from the analysis in Chromium performance
// numbers compatible format to stdout. If the results object contains no frames
// no output will be written.
void PrintAnalysisResults(const std::string& label,
ResultsContainer& results,
MetricsLogger& logger);
struct Cluster {
// Corresponding reference frame index for this cluster.
size_t index;
// The number of sequential frames that mapped to the same reference frame
// index.
int number_of_repeated_frames;
};
// Clusters sequentially repeated frames. For example, the sequence {100, 102,
// 102, 103} will be mapped to {{100, 1}, {102, 2}, {103, 1}}.
std::vector<Cluster> CalculateFrameClusters(const std::vector<size_t>& indices);
// Get number of max sequentially repeated frames in the test video. This number
// will be one if we only store unique frames in the test video.
int GetMaxRepeatedFrames(const std::vector<Cluster>& clusters);
// Get the longest sequence of skipped reference frames. This corresponds to the
// longest freeze in the test video.
int GetMaxSkippedFrames(const std::vector<Cluster>& clusters);
// Get total number of skipped frames in the test video.
int GetTotalNumberOfSkippedFrames(const std::vector<Cluster>& clusters);
} // namespace test
} // namespace webrtc
#endif // RTC_TOOLS_FRAME_ANALYZER_VIDEO_QUALITY_ANALYSIS_H_
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