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 "timebase.h"
  32 #include "ui_mainwindow.h"
  33
  34 using namespace std;
  35 using namespace std::chrono;
  36
  37 std::mutex RefCountedGLsync::fence_lock;
  38
  39 // TODO: Replace by some sort of GUI control, I guess.
  40 int64_t current_pts = 0;
  41
  42 string filename_for_frame(unsigned stream_idx, int64_t pts)
  43 {
  44         char filename[256];
  45         snprintf(filename, sizeof(filename), "frames/cam%d-pts%09ld.jpeg", stream_idx, pts);
  46         return filename;
  47 }
  48
  49 mutex frame_mu;
  50 vector<int64_t> frames[MAX_STREAMS];
  51 HTTPD *global_httpd;
  52
  53 int record_thread_func();
  54
  55 int main(int argc, char **argv)
  56 {
  57         avformat_network_init();
  58         global_httpd = new HTTPD;
  59         global_httpd->start(DEFAULT_HTTPD_PORT);
  60
  61         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
  62
  63         QSurfaceFormat fmt;
  64         fmt.setDepthBufferSize(0);
  65         fmt.setStencilBufferSize(0);
  66         fmt.setProfile(QSurfaceFormat::CoreProfile);
  67         fmt.setMajorVersion(4);
  68         fmt.setMinorVersion(5);
  69
  70         // Turn off vsync, since Qt generally gives us at most frame rate
  71         // (display frequency) / (number of QGLWidgets active).
  72         fmt.setSwapInterval(0);
  73
  74         QSurfaceFormat::setDefaultFormat(fmt);
  75
  76         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
  77
  78         QApplication app(argc, argv);
  79         global_share_widget = new QGLWidget();
  80         if (!global_share_widget->isValid()) {
  81                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
  82                 exit(1);
  83         }
  84
  85         // Initialize Movit.
  86         {
  87                 QSurface *surface = create_surface();
  88                 QOpenGLContext *context = create_context(surface);
  89                 make_current(context, surface);
  90                 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
  91                 delete_context(context);
  92                 // TODO: Delete the surface, too.
  93         }
  94
  95         MainWindow mainWindow;
  96         mainWindow.show();
  97
  98         thread(record_thread_func).detach();
  99
 100         return app.exec();
 101 }
 102
 103 int record_thread_func()
 104 {
 105         auto format_ctx = avformat_open_input_unique("multiangle.mp4", nullptr, nullptr);
 106         if (format_ctx == nullptr) {
 107                 fprintf(stderr, "%s: Error opening file\n", "example.mp4");
 108                 return 1;
 109         }
 110
 111         int64_t last_pts = -1;
 112
 113         for ( ;; ) {
 114                 AVPacket pkt;
 115                 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
 116                         &pkt, av_packet_unref);
 117                 av_init_packet(&pkt);
 118                 pkt.data = nullptr;
 119                 pkt.size = 0;
 120                 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
 121                         break;
 122                 }
 123
 124                 // Convert pts to our own timebase.
 125                 // TODO: Figure out offsets, too.
 126                 AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
 127                 pkt.pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
 128
 129                 //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
 130                 //      pkt.stream_index, pkt.pts, pkt.size);
 131                 string filename = filename_for_frame(pkt.stream_index, pkt.pts);
 132                 FILE *fp = fopen(filename.c_str(), "wb");
 133                 if (fp == nullptr) {
 134                         perror(filename.c_str());
 135                         exit(1);
 136                 }
 137                 fwrite(pkt.data, pkt.size, 1, fp);
 138                 fclose(fp);
 139
 140                 post_to_main_thread([pkt] {
 141                         if (pkt.stream_index == 0) {
 142                                 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, pkt.pts);
 143                         } else if (pkt.stream_index == 1) {
 144                                 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, pkt.pts);
 145                         } else if (pkt.stream_index == 2) {
 146                                 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, pkt.pts);
 147                         } else if (pkt.stream_index == 3) {
 148                                 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, pkt.pts);
 149                         }
 150                 });
 151
 152                 assert(pkt.stream_index < MAX_STREAMS);
 153                 frames[pkt.stream_index].push_back(pkt.pts);
 154
 155                 // Hack. Remove when we're dealing with live streams.
 156                 if (last_pts != -1) {
 157                         this_thread::sleep_for(microseconds((pkt.pts - last_pts) * 1000000 / TIMEBASE));
 158                 }
 159                 last_pts = pkt.pts;
 160                 current_pts = pkt.pts;
 161         }
 162
 163         return 0;
 164 }