]> git.sesse.net Git - nageru/blob - main.cpp
Hook up the fourth camera display.
[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
43 int record_thread_func();
44
45 int main(int argc, char **argv)
46 {
47         av_register_all();
48         avformat_network_init();
49
50         QApplication app(argc, argv);
51         MainWindow mainWindow;
52         mainWindow.show();
53
54         thread(record_thread_func).detach();
55
56         return app.exec();
57 }
58
59 int record_thread_func()
60 {
61         auto format_ctx = avformat_open_input_unique("multiangle.mp4", nullptr, nullptr);
62         if (format_ctx == nullptr) {
63                 fprintf(stderr, "%s: Error opening file\n", "example.mp4");
64                 return 1;
65         }
66
67         int64_t last_pts = -1;
68
69         for ( ;; ) {
70                 AVPacket pkt;
71                 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
72                         &pkt, av_packet_unref);
73                 av_init_packet(&pkt);
74                 pkt.data = nullptr;
75                 pkt.size = 0;
76                 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
77                         break;
78                 }
79                 fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
80                         pkt.stream_index, pkt.pts, pkt.size);
81                 string filename = filename_for_frame(pkt.stream_index, pkt.pts);
82                 FILE *fp = fopen(filename.c_str(), "wb");
83                 if (fp == nullptr) {
84                         perror(filename.c_str());
85                         exit(1);
86                 }
87                 fwrite(pkt.data, pkt.size, 1, fp);
88                 fclose(fp);
89
90                 post_to_main_thread([pkt] {
91                         if (pkt.stream_index == 0) {
92                                 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, pkt.pts);
93                         } else if (pkt.stream_index == 1) {
94                                 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, pkt.pts);
95                         } else if (pkt.stream_index == 2) {
96                                 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, pkt.pts);
97                         } else if (pkt.stream_index == 3) {
98                                 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, pkt.pts);
99                         }
100                 });
101
102                 assert(pkt.stream_index < MAX_STREAMS);
103                 frames[pkt.stream_index].push_back(pkt.pts);
104
105                 // Hack. Assumes a given timebase.
106                 if (last_pts != -1) {
107                         this_thread::sleep_for(microseconds((pkt.pts - last_pts) * 1000000 / 12800));
108                 }
109                 last_pts = pkt.pts;
110                 current_pts = pkt.pts;
111         }
112
113         return 0;
114 }