git.sesse.net Git - nageru/blob - main.cpp

   1 #include <assert.h>
   2 #include <atomic>
   3 #include <chrono>
   4 #include <condition_variable>
   5 #include <dirent.h>
   6 #include <memory>
   7 #include <mutex>
   8 #include <stdint.h>
   9 #include <stdio.h>
  10 #include <string>
  11 #include <sys/types.h>
  12 #include <thread>
  13 #include <vector>
  14
  15 extern "C" {
  16 #include <libavformat/avformat.h>
  17 }
  18
  19 #include "clip_list.h"
  20 #include "context.h"
  21 #include "defs.h"
  22 #include "disk_space_estimator.h"
  23 #include "ffmpeg_raii.h"
  24 #include "httpd.h"
  25 #include "mainwindow.h"
  26 #include "player.h"
  27 #include "post_to_main_thread.h"
  28 #include "ref_counted_gl_sync.h"
  29 #include "timebase.h"
  30 #include "ui_mainwindow.h"
  31 #include "vaapi_jpeg_decoder.h"
  32
  33 #include <QApplication>
  34 #include <movit/init.h>
  35 #include <movit/util.h>
  36
  37 using namespace std;
  38 using namespace std::chrono;
  39
  40 mutex RefCountedGLsync::fence_lock;
  41 atomic<bool> should_quit{false};
  42
  43 int64_t start_pts = -1;
  44
  45 // TODO: Replace by some sort of GUI control, I guess.
  46 int64_t current_pts = 0;
  47
  48 string filename_for_frame(unsigned stream_idx, int64_t pts)
  49 {
  50         char filename[256];
  51         snprintf(filename, sizeof(filename), "frames/cam%d-pts%09ld.jpeg", stream_idx, pts);
  52         return filename;
  53 }
  54
  55 mutex frame_mu;
  56 vector<int64_t> frames[MAX_STREAMS];
  57 HTTPD *global_httpd;
  58
  59 void load_existing_frames();
  60 int record_thread_func();
  61
  62 int main(int argc, char **argv)
  63 {
  64         avformat_network_init();
  65         global_httpd = new HTTPD;
  66         global_httpd->start(DEFAULT_HTTPD_PORT);
  67
  68         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
  69
  70         QSurfaceFormat fmt;
  71         fmt.setDepthBufferSize(0);
  72         fmt.setStencilBufferSize(0);
  73         fmt.setProfile(QSurfaceFormat::CoreProfile);
  74         fmt.setMajorVersion(4);
  75         fmt.setMinorVersion(5);
  76
  77         // Turn off vsync, since Qt generally gives us at most frame rate
  78         // (display frequency) / (number of QGLWidgets active).
  79         fmt.setSwapInterval(0);
  80
  81         QSurfaceFormat::setDefaultFormat(fmt);
  82
  83         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
  84
  85         QApplication app(argc, argv);
  86         global_share_widget = new QGLWidget();
  87         if (!global_share_widget->isValid()) {
  88                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
  89                 exit(1);
  90         }
  91
  92         // Initialize Movit.
  93         {
  94                 QSurface *surface = create_surface();
  95                 QOpenGLContext *context = create_context(surface);
  96                 make_current(context, surface);
  97                 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
  98                 delete_context(context);
  99                 // TODO: Delete the surface, too.
 100         }
 101
 102         MainWindow mainWindow;
 103         mainWindow.show();
 104
 105         init_jpeg_vaapi();
 106
 107         load_existing_frames();
 108         thread record_thread(record_thread_func);
 109
 110         int ret = app.exec();
 111
 112         should_quit = true;
 113         record_thread.join();
 114         JPEGFrameView::shutdown();
 115
 116         return ret;
 117 }
 118
 119 void load_existing_frames()
 120 {
 121         DIR *dir = opendir("frames/");
 122         if (dir == nullptr) {
 123                 perror("frames/");
 124                 start_pts = 0;
 125                 return;
 126         }
 127
 128         for ( ;; ) {
 129                 errno = 0;
 130                 dirent *de = readdir(dir);
 131                 if (de == nullptr) {
 132                         if (errno != 0) {
 133                                 perror("readdir");
 134                                 exit(1);
 135                         }
 136                         break;
 137                 }
 138
 139                 int stream_idx;
 140                 int64_t pts;
 141                 if (sscanf(de->d_name, "cam%d-pts%ld.jpeg", &stream_idx, &pts) == 2 &&
 142                     stream_idx >= 0 && stream_idx < MAX_STREAMS) {
 143                         frames[stream_idx].push_back(pts);
 144                         start_pts = max(start_pts, pts);
 145                 }
 146         }
 147
 148         closedir(dir);
 149
 150         if (start_pts == -1) {
 151                 start_pts = 0;
 152         } else {
 153                 // Add a gap of one second from the old frames to the new ones.
 154                 start_pts += TIMEBASE;
 155         }
 156
 157         for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 158                 sort(frames[stream_idx].begin(), frames[stream_idx].end());
 159         }
 160 }
 161
 162 int record_thread_func()
 163 {
 164         auto format_ctx = avformat_open_input_unique("multiangle.mp4", nullptr, nullptr);
 165         if (format_ctx == nullptr) {
 166                 fprintf(stderr, "%s: Error opening file\n", "example.mp4");
 167                 return 1;
 168         }
 169
 170         int64_t last_pts = -1;
 171         int64_t pts_offset;
 172
 173         while (!should_quit.load()) {
 174                 AVPacket pkt;
 175                 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
 176                         &pkt, av_packet_unref);
 177                 av_init_packet(&pkt);
 178                 pkt.data = nullptr;
 179                 pkt.size = 0;
 180
 181                 // TODO: Make it possible to abort av_read_frame() (use an interrupt callback);
 182                 // right now, should_quit will be ignored if it's hung on I/O.
 183                 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
 184                         break;
 185                 }
 186
 187                 // Convert pts to our own timebase.
 188                 AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
 189                 int64_t pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
 190
 191                 // Translate offset into our stream.
 192                 if (last_pts == -1) {
 193                         pts_offset = start_pts - pts;
 194                 }
 195                 pts = std::max(pts + pts_offset, start_pts);
 196
 197                 //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
 198                 //      pkt.stream_index, pts, pkt.size);
 199                 string filename = filename_for_frame(pkt.stream_index, pts);
 200                 FILE *fp = fopen(filename.c_str(), "wb");
 201                 if (fp == nullptr) {
 202                         perror(filename.c_str());
 203                         exit(1);
 204                 }
 205                 fwrite(pkt.data, pkt.size, 1, fp);
 206                 fclose(fp);
 207
 208                 global_disk_space_estimator->report_write(filename, pts);
 209
 210                 post_to_main_thread([pkt, pts] {
 211                         if (pkt.stream_index == 0) {
 212                                 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 213                         } else if (pkt.stream_index == 1) {
 214                                 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 215                         } else if (pkt.stream_index == 2) {
 216                                 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 217                         } else if (pkt.stream_index == 3) {
 218                                 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 219                         }
 220                 });
 221
 222                 assert(pkt.stream_index < MAX_STREAMS);
 223                 frames[pkt.stream_index].push_back(pts);
 224
 225                 // Hack. Remove when we're dealing with live streams.
 226                 if (last_pts != -1) {
 227                         this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));
 228                 }
 229                 last_pts = pts;
 230                 current_pts = pts;
 231         }
 232
 233         return 0;
 234 }