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 <getopt.h>
   7 #include <memory>
   8 #include <mutex>
   9 #include <stdint.h>
  10 #include <stdio.h>
  11 #include <string>
  12 #include <sys/types.h>
  13 #include <thread>
  14 #include <vector>
  15
  16 extern "C" {
  17 #include <libavformat/avformat.h>
  18 }
  19
  20 #include "clip_list.h"
  21 #include "context.h"
  22 #include "defs.h"
  23 #include "disk_space_estimator.h"
  24 #include "ffmpeg_raii.h"
  25 #include "flags.h"
  26 #include "httpd.h"
  27 #include "mainwindow.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 #include "vaapi_jpeg_decoder.h"
  34
  35 #include <QApplication>
  36 #include <movit/init.h>
  37 #include <movit/util.h>
  38
  39 using namespace std;
  40 using namespace std::chrono;
  41
  42 mutex RefCountedGLsync::fence_lock;
  43 atomic<bool> should_quit{false};
  44
  45 int64_t start_pts = -1;
  46
  47 // TODO: Replace by some sort of GUI control, I guess.
  48 int64_t current_pts = 0;
  49
  50 string filename_for_frame(unsigned stream_idx, int64_t pts)
  51 {
  52         char filename[256];
  53         snprintf(filename, sizeof(filename), "frames/cam%d-pts%09ld.jpeg", stream_idx, pts);
  54         return filename;
  55 }
  56
  57 mutex frame_mu;
  58 vector<int64_t> frames[MAX_STREAMS];
  59 HTTPD *global_httpd;
  60
  61 void load_existing_frames();
  62 int record_thread_func();
  63
  64 int main(int argc, char **argv)
  65 {
  66         parse_flags(argc, argv);
  67         if (optind == argc) {
  68                 global_flags.stream_source = "multiangle.mp4";
  69                 global_flags.slow_down_input = true;
  70         } else if (optind + 1 == argc) {
  71                 global_flags.stream_source = argv[optind];
  72         } else {
  73                 usage();
  74                 exit(1);
  75         }
  76
  77         avformat_network_init();
  78         global_httpd = new HTTPD;
  79
  80         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
  81
  82         QSurfaceFormat fmt;
  83         fmt.setDepthBufferSize(0);
  84         fmt.setStencilBufferSize(0);
  85         fmt.setProfile(QSurfaceFormat::CoreProfile);
  86         fmt.setMajorVersion(4);
  87         fmt.setMinorVersion(5);
  88
  89         // Turn off vsync, since Qt generally gives us at most frame rate
  90         // (display frequency) / (number of QGLWidgets active).
  91         fmt.setSwapInterval(0);
  92
  93         QSurfaceFormat::setDefaultFormat(fmt);
  94
  95         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
  96
  97         QApplication app(argc, argv);
  98         global_share_widget = new QGLWidget();
  99         if (!global_share_widget->isValid()) {
 100                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
 101                 exit(1);
 102         }
 103
 104         // Initialize Movit.
 105         {
 106                 QSurface *surface = create_surface();
 107                 QOpenGLContext *context = create_context(surface);
 108                 make_current(context, surface);
 109                 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
 110                 delete_context(context);
 111                 // TODO: Delete the surface, too.
 112         }
 113
 114         MainWindow main_window;
 115         main_window.show();
 116
 117         global_httpd->add_endpoint("/queue_status", bind(&MainWindow::get_queue_status, &main_window), HTTPD::NO_CORS_POLICY);
 118         global_httpd->start(DEFAULT_HTTPD_PORT);
 119
 120         init_jpeg_vaapi();
 121
 122         load_existing_frames();
 123         thread record_thread(record_thread_func);
 124
 125         int ret = app.exec();
 126
 127         should_quit = true;
 128         record_thread.join();
 129         JPEGFrameView::shutdown();
 130
 131         return ret;
 132 }
 133
 134 void load_existing_frames()
 135 {
 136         DIR *dir = opendir("frames/");
 137         if (dir == nullptr) {
 138                 perror("frames/");
 139                 start_pts = 0;
 140                 return;
 141         }
 142
 143         for ( ;; ) {
 144                 errno = 0;
 145                 dirent *de = readdir(dir);
 146                 if (de == nullptr) {
 147                         if (errno != 0) {
 148                                 perror("readdir");
 149                                 exit(1);
 150                         }
 151                         break;
 152                 }
 153
 154                 int stream_idx;
 155                 int64_t pts;
 156                 if (sscanf(de->d_name, "cam%d-pts%ld.jpeg", &stream_idx, &pts) == 2 &&
 157                     stream_idx >= 0 && stream_idx < MAX_STREAMS) {
 158                         frames[stream_idx].push_back(pts);
 159                         start_pts = max(start_pts, pts);
 160                 }
 161         }
 162
 163         closedir(dir);
 164
 165         if (start_pts == -1) {
 166                 start_pts = 0;
 167         } else {
 168                 // Add a gap of one second from the old frames to the new ones.
 169                 start_pts += TIMEBASE;
 170         }
 171
 172         for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 173                 sort(frames[stream_idx].begin(), frames[stream_idx].end());
 174         }
 175 }
 176
 177 int record_thread_func()
 178 {
 179         auto format_ctx = avformat_open_input_unique(global_flags.stream_source.c_str(), nullptr, nullptr);
 180         if (format_ctx == nullptr) {
 181                 fprintf(stderr, "%s: Error opening file\n", global_flags.stream_source.c_str());
 182                 return 1;
 183         }
 184
 185         int64_t last_pts = -1;
 186         int64_t pts_offset;
 187
 188         while (!should_quit.load()) {
 189                 AVPacket pkt;
 190                 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
 191                         &pkt, av_packet_unref);
 192                 av_init_packet(&pkt);
 193                 pkt.data = nullptr;
 194                 pkt.size = 0;
 195
 196                 // TODO: Make it possible to abort av_read_frame() (use an interrupt callback);
 197                 // right now, should_quit will be ignored if it's hung on I/O.
 198                 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
 199                         break;
 200                 }
 201
 202                 // Convert pts to our own timebase.
 203                 AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
 204                 int64_t pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
 205
 206                 // Translate offset into our stream.
 207                 if (last_pts == -1) {
 208                         pts_offset = start_pts - pts;
 209                 }
 210                 pts = std::max(pts + pts_offset, start_pts);
 211
 212                 //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
 213                 //      pkt.stream_index, pts, pkt.size);
 214                 string filename = filename_for_frame(pkt.stream_index, pts);
 215                 FILE *fp = fopen(filename.c_str(), "wb");
 216                 if (fp == nullptr) {
 217                         perror(filename.c_str());
 218                         exit(1);
 219                 }
 220                 fwrite(pkt.data, pkt.size, 1, fp);
 221                 fclose(fp);
 222
 223                 global_disk_space_estimator->report_write(filename, pts);
 224
 225                 post_to_main_thread([pkt, pts] {
 226                         if (pkt.stream_index == 0) {
 227                                 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 228                         } else if (pkt.stream_index == 1) {
 229                                 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 230                         } else if (pkt.stream_index == 2) {
 231                                 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 232                         } else if (pkt.stream_index == 3) {
 233                                 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 234                         }
 235                 });
 236
 237                 assert(pkt.stream_index < MAX_STREAMS);
 238                 frames[pkt.stream_index].push_back(pts);
 239
 240                 if (last_pts != -1 && global_flags.slow_down_input) {
 241                         this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));
 242                 }
 243                 last_pts = pts;
 244                 current_pts = pts;
 245         }
 246
 247         return 0;
 248 }