]> git.sesse.net Git - nageru/blob - main.cpp
av_register_all() is deprecated, so do not call it anymore (no replacement needed).
[nageru] / main.cpp
1 #include <assert.h>
2 #include <stdio.h>
3 #include <stdint.h>
4
5 #include <chrono>
6 #include <condition_variable>
7 #include <memory>
8 #include <mutex>
9 #include <string>
10 #include <thread>
11 #include <vector>
12
13 extern "C" {
14 #include <libavformat/avformat.h>
15 }
16
17 #include <QApplication>
18
19 #include "clip_list.h"
20 #include "defs.h"
21 #include "mainwindow.h"
22 #include "ffmpeg_raii.h"
23 #include "player.h"
24 #include "post_to_main_thread.h"
25 #include "ui_mainwindow.h"
26
27 using namespace std;
28 using namespace std::chrono;
29
30 // TODO: Replace by some sort of GUI control, I guess.
31 int64_t current_pts = 0;
32
33 string filename_for_frame(unsigned stream_idx, int64_t pts)
34 {
35         char filename[256];
36         snprintf(filename, sizeof(filename), "frames/cam%d-pts%09ld.jpeg", stream_idx, pts);
37         return filename;
38 }
39
40 mutex frame_mu;
41 vector<int64_t> frames[MAX_STREAMS];
42 QGLWidget *global_share_widget;
43
44 int record_thread_func();
45
46 int main(int argc, char **argv)
47 {
48         avformat_network_init();
49
50         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
51
52         QSurfaceFormat fmt;
53         fmt.setDepthBufferSize(0);
54         fmt.setStencilBufferSize(0);
55         fmt.setProfile(QSurfaceFormat::CoreProfile);
56         fmt.setMajorVersion(3);
57         fmt.setMinorVersion(1);
58
59         // Turn off vsync, since Qt generally gives us at most frame rate
60         // (display frequency) / (number of QGLWidgets active).
61         fmt.setSwapInterval(0);
62
63         QSurfaceFormat::setDefaultFormat(fmt);
64
65         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
66
67         QApplication app(argc, argv);
68         global_share_widget = new QGLWidget();
69         if (!global_share_widget->isValid()) {
70                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 3.1 to function properly.\n");
71                 exit(1);
72         }
73         MainWindow mainWindow;
74         mainWindow.show();
75
76         thread(record_thread_func).detach();
77
78         return app.exec();
79 }
80
81 int record_thread_func()
82 {
83         auto format_ctx = avformat_open_input_unique("multiangle.mp4", nullptr, nullptr);
84         if (format_ctx == nullptr) {
85                 fprintf(stderr, "%s: Error opening file\n", "example.mp4");
86                 return 1;
87         }
88
89         int64_t last_pts = -1;
90
91         for ( ;; ) {
92                 AVPacket pkt;
93                 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
94                         &pkt, av_packet_unref);
95                 av_init_packet(&pkt);
96                 pkt.data = nullptr;
97                 pkt.size = 0;
98                 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
99                         break;
100                 }
101                 //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
102                 //      pkt.stream_index, pkt.pts, pkt.size);
103                 string filename = filename_for_frame(pkt.stream_index, pkt.pts);
104                 FILE *fp = fopen(filename.c_str(), "wb");
105                 if (fp == nullptr) {
106                         perror(filename.c_str());
107                         exit(1);
108                 }
109                 fwrite(pkt.data, pkt.size, 1, fp);
110                 fclose(fp);
111
112                 post_to_main_thread([pkt] {
113                         if (pkt.stream_index == 0) {
114                                 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, pkt.pts);
115                         } else if (pkt.stream_index == 1) {
116                                 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, pkt.pts);
117                         } else if (pkt.stream_index == 2) {
118                                 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, pkt.pts);
119                         } else if (pkt.stream_index == 3) {
120                                 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, pkt.pts);
121                         }
122                 });
123
124                 assert(pkt.stream_index < MAX_STREAMS);
125                 frames[pkt.stream_index].push_back(pkt.pts);
126
127                 // Hack. Assumes a given timebase.
128                 if (last_pts != -1) {
129                         this_thread::sleep_for(microseconds((pkt.pts - last_pts) * 1000000 / 12800));
130                 }
131                 last_pts = pkt.pts;
132                 current_pts = pkt.pts;
133         }
134
135         return 0;
136 }