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 <movit/init.h>
  20 #include <movit/util.h>
  21
  22 #include "clip_list.h"
  23 #include "context.h"
  24 #include "defs.h"
  25 #include "mainwindow.h"
  26 #include "ffmpeg_raii.h"
  27 #include "httpd.h"
  28 #include "player.h"
  29 #include "post_to_main_thread.h"
  30 #include "ref_counted_gl_sync.h"
  31 #include "ui_mainwindow.h"
  32
  33 using namespace std;
  34 using namespace std::chrono;
  35
  36 std::mutex RefCountedGLsync::fence_lock;
  37
  38 // TODO: Replace by some sort of GUI control, I guess.
  39 int64_t current_pts = 0;
  40
  41 string filename_for_frame(unsigned stream_idx, int64_t pts)
  42 {
  43         char filename[256];
  44         snprintf(filename, sizeof(filename), "frames/cam%d-pts%09ld.jpeg", stream_idx, pts);
  45         return filename;
  46 }
  47
  48 mutex frame_mu;
  49 vector<int64_t> frames[MAX_STREAMS];
  50 HTTPD *global_httpd;
  51
  52 int record_thread_func();
  53
  54 int main(int argc, char **argv)
  55 {
  56         avformat_network_init();
  57         global_httpd = new HTTPD;
  58         global_httpd->start(DEFAULT_HTTPD_PORT);
  59
  60         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
  61
  62         QSurfaceFormat fmt;
  63         fmt.setDepthBufferSize(0);
  64         fmt.setStencilBufferSize(0);
  65         fmt.setProfile(QSurfaceFormat::CoreProfile);
  66         fmt.setMajorVersion(4);
  67         fmt.setMinorVersion(5);
  68
  69         // Turn off vsync, since Qt generally gives us at most frame rate
  70         // (display frequency) / (number of QGLWidgets active).
  71         fmt.setSwapInterval(0);
  72
  73         QSurfaceFormat::setDefaultFormat(fmt);
  74
  75         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
  76
  77         QApplication app(argc, argv);
  78         global_share_widget = new QGLWidget();
  79         if (!global_share_widget->isValid()) {
  80                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
  81                 exit(1);
  82         }
  83
  84         // Initialize Movit.
  85         {
  86                 QSurface *surface = create_surface();
  87                 QOpenGLContext *context = create_context(surface);
  88                 make_current(context, surface);
  89                 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
  90                 delete_context(context);
  91                 // TODO: Delete the surface, too.
  92         }
  93
  94         MainWindow mainWindow;
  95         mainWindow.show();
  96
  97         thread(record_thread_func).detach();
  98
  99         return app.exec();
 100 }
 101
 102 int record_thread_func()
 103 {
 104         auto format_ctx = avformat_open_input_unique("multiangle.mp4", nullptr, nullptr);
 105         if (format_ctx == nullptr) {
 106                 fprintf(stderr, "%s: Error opening file\n", "example.mp4");
 107                 return 1;
 108         }
 109
 110         int64_t last_pts = -1;
 111
 112         for ( ;; ) {
 113                 AVPacket pkt;
 114                 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
 115                         &pkt, av_packet_unref);
 116                 av_init_packet(&pkt);
 117                 pkt.data = nullptr;
 118                 pkt.size = 0;
 119                 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
 120                         break;
 121                 }
 122                 //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
 123                 //      pkt.stream_index, pkt.pts, pkt.size);
 124                 string filename = filename_for_frame(pkt.stream_index, pkt.pts);
 125                 FILE *fp = fopen(filename.c_str(), "wb");
 126                 if (fp == nullptr) {
 127                         perror(filename.c_str());
 128                         exit(1);
 129                 }
 130                 fwrite(pkt.data, pkt.size, 1, fp);
 131                 fclose(fp);
 132
 133                 post_to_main_thread([pkt] {
 134                         if (pkt.stream_index == 0) {
 135                                 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, pkt.pts);
 136                         } else if (pkt.stream_index == 1) {
 137                                 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, pkt.pts);
 138                         } else if (pkt.stream_index == 2) {
 139                                 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, pkt.pts);
 140                         } else if (pkt.stream_index == 3) {
 141                                 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, pkt.pts);
 142                         }
 143                 });
 144
 145                 assert(pkt.stream_index < MAX_STREAMS);
 146                 frames[pkt.stream_index].push_back(pkt.pts);
 147
 148                 // Hack. Assumes a given timebase.
 149                 if (last_pts != -1) {
 150                         this_thread::sleep_for(microseconds((pkt.pts - last_pts) * 1000000 / 12800));
 151                 }
 152                 last_pts = pkt.pts;
 153                 current_pts = pkt.pts;
 154         }
 155
 156         return 0;
 157 }