1 /*
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
3 *
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.
9 */
10
11 #include <limits.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14
15 #include <map>
16 #include <string>
17 #include <vector>
18
19 #include "webrtc/tools/frame_analyzer/video_quality_analysis.h"
20 #include "webrtc/tools/simple_command_line_parser.h"
21
22 #define MAX_NUM_FRAMES_PER_FILE INT_MAX
23
CompareFiles(const char * reference_file_name,const char * test_file_name,const char * results_file_name,int width,int height)24 void CompareFiles(const char* reference_file_name, const char* test_file_name,
25 const char* results_file_name, int width, int height) {
26 // Check if the reference_file_name ends with "y4m".
27 bool y4m_mode = false;
28 if (std::string(reference_file_name).find("y4m") != std::string::npos) {
29 y4m_mode = true;
30 }
31
32 FILE* results_file = fopen(results_file_name, "w");
33
34 int size = webrtc::test::GetI420FrameSize(width, height);
35
36 // Allocate buffers for test and reference frames.
37 uint8_t* test_frame = new uint8_t[size];
38 uint8_t* ref_frame = new uint8_t[size];
39
40 bool read_result = true;
41 for (int frame_counter = 0; frame_counter < MAX_NUM_FRAMES_PER_FILE;
42 ++frame_counter) {
43 read_result &= (y4m_mode) ? webrtc::test::ExtractFrameFromY4mFile(
44 reference_file_name, width, height, frame_counter, ref_frame):
45 webrtc::test::ExtractFrameFromYuvFile(reference_file_name, width,
46 height, frame_counter, ref_frame);
47 read_result &= webrtc::test::ExtractFrameFromYuvFile(test_file_name, width,
48 height, frame_counter, test_frame);
49
50 if (!read_result)
51 break;
52
53 // Calculate the PSNR and SSIM.
54 double result_psnr = webrtc::test::CalculateMetrics(
55 webrtc::test::kPSNR, ref_frame, test_frame, width, height);
56 double result_ssim = webrtc::test::CalculateMetrics(
57 webrtc::test::kSSIM, ref_frame, test_frame, width, height);
58 fprintf(results_file, "Frame: %d, PSNR: %f, SSIM: %f\n", frame_counter,
59 result_psnr, result_ssim);
60 }
61 delete[] test_frame;
62 delete[] ref_frame;
63
64 fclose(results_file);
65 }
66
67 /*
68 * A tool running PSNR and SSIM analysis on two videos - a reference video and a
69 * test video. The two videos should be I420 YUV videos.
70 * The tool just runs PSNR and SSIM on the corresponding frames in the test and
71 * the reference videos until either the first or the second video runs out of
72 * frames. The result is written in a results text file in the format:
73 * Frame: <frame_number>, PSNR: <psnr_value>, SSIM: <ssim_value>
74 * Frame: <frame_number>, ........
75 *
76 * The max value for PSNR is 48.0 (between equal frames), as for SSIM it is 1.0.
77 *
78 * Usage:
79 * psnr_ssim_analyzer --reference_file=<name_of_file> --test_file=<name_of_file>
80 * --results_file=<name_of_file> --width=<width_of_frames>
81 * --height=<height_of_frames>
82 */
main(int argc,char ** argv)83 int main(int argc, char** argv) {
84 std::string program_name = argv[0];
85 std::string usage = "Runs PSNR and SSIM on two I420 videos and write the"
86 "results in a file.\n"
87 "Example usage:\n" + program_name + " --reference_file=ref.yuv "
88 "--test_file=test.yuv --results_file=results.txt --width=320 "
89 "--height=240\n"
90 "Command line flags:\n"
91 " - width(int): The width of the reference and test files. Default: -1\n"
92 " - height(int): The height of the reference and test files. "
93 " Default: -1\n"
94 " - reference_file(string): The reference YUV file to compare against."
95 " Default: ref.yuv\n"
96 " - test_file(string): The test YUV file to run the analysis for."
97 " Default: test_file.yuv\n"
98 " - results_file(string): The full name of the file where the results "
99 "will be written. Default: results.txt\n";
100
101 webrtc::test::CommandLineParser parser;
102
103 // Init the parser and set the usage message
104 parser.Init(argc, argv);
105 parser.SetUsageMessage(usage);
106
107 parser.SetFlag("width", "-1");
108 parser.SetFlag("height", "-1");
109 parser.SetFlag("results_file", "results.txt");
110 parser.SetFlag("reference_file", "ref.yuv");
111 parser.SetFlag("test_file", "test.yuv");
112 parser.SetFlag("results_file", "results.txt");
113 parser.SetFlag("help", "false");
114
115 parser.ProcessFlags();
116 if (parser.GetFlag("help") == "true") {
117 parser.PrintUsageMessage();
118 exit(EXIT_SUCCESS);
119 }
120 parser.PrintEnteredFlags();
121
122 int width = strtol((parser.GetFlag("width")).c_str(), NULL, 10);
123 int height = strtol((parser.GetFlag("height")).c_str(), NULL, 10);
124
125 if (width <= 0 || height <= 0) {
126 fprintf(stderr, "Error: width or height cannot be <= 0!\n");
127 return -1;
128 }
129
130 CompareFiles(parser.GetFlag("reference_file").c_str(),
131 parser.GetFlag("test_file").c_str(),
132 parser.GetFlag("results_file").c_str(), width, height);
133 }
134