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