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

   1 #include <assert.h>
   2 #include <arpa/inet.h>
   3 #include <atomic>
   4 #include <chrono>
   5 #include <condition_variable>
   6 #include <dirent.h>
   7 #include <getopt.h>
   8 #include <memory>
   9 #include <mutex>
  10 #include <stdint.h>
  11 #include <stdio.h>
  12 #include <string>
  13 #include <sys/stat.h>
  14 #include <sys/types.h>
  15 #include <thread>
  16 #include <unistd.h>
  17 #include <vector>
  18
  19 extern "C" {
  20 #include <libavformat/avformat.h>
  21 }
  22
  23 #include "clip_list.h"
  24 #include "shared/context.h"
  25 #include "defs.h"
  26 #include "shared/disk_space_estimator.h"
  27 #include "shared/ffmpeg_raii.h"
  28 #include "flags.h"
  29 #include "frame_on_disk.h"
  30 #include "frame.pb.h"
  31 #include "shared/httpd.h"
  32 #include "mainwindow.h"
  33 #include "player.h"
  34 #include "shared/post_to_main_thread.h"
  35 #include "shared/ref_counted_gl_sync.h"
  36 #include "shared/timebase.h"
  37 #include "shared/metrics.h"
  38 #include "ui_mainwindow.h"
  39 #include "vaapi_jpeg_decoder.h"
  40
  41 #include <QApplication>
  42 #include <QGLFormat>
  43 #include <QSurfaceFormat>
  44 #include <QProgressDialog>
  45 #include <movit/init.h>
  46 #include <movit/util.h>
  47
  48 using namespace std;
  49 using namespace std::chrono;
  50
  51 constexpr char frame_magic[] = "Ftbifrm0";
  52 constexpr size_t frame_magic_len = 8;
  53
  54 mutex RefCountedGLsync::fence_lock;
  55 atomic<bool> should_quit{false};
  56
  57 int64_t start_pts = -1;
  58
  59 // TODO: Replace by some sort of GUI control, I guess.
  60 int64_t current_pts = 0;
  61
  62 struct FrameFile {
  63         FILE *fp = nullptr;
  64         unsigned filename_idx;
  65         size_t frames_written_so_far = 0;
  66 };
  67 std::map<int, FrameFile> open_frame_files;
  68
  69 mutex frame_mu;
  70 vector<FrameOnDisk> frames[MAX_STREAMS];  // Under frame_mu.
  71 vector<string> frame_filenames;  // Under frame_mu.
  72
  73 atomic<int64_t> metric_received_frames[MAX_STREAMS]{{0}};
  74
  75 namespace {
  76
  77 FrameOnDisk write_frame(int stream_idx, int64_t pts, const uint8_t *data, size_t size, DB *db)
  78 {
  79         if (open_frame_files.count(stream_idx) == 0) {
  80                 char filename[256];
  81                 snprintf(filename, sizeof(filename), "%s/frames/cam%d-pts%09ld.frames",
  82                         global_flags.working_directory.c_str(), stream_idx, pts);
  83                 FILE *fp = fopen(filename, "wb");
  84                 if (fp == nullptr) {
  85                         perror(filename);
  86                         exit(1);
  87                 }
  88
  89                 lock_guard<mutex> lock(frame_mu);
  90                 unsigned filename_idx = frame_filenames.size();
  91                 frame_filenames.push_back(filename);
  92                 open_frame_files[stream_idx] = FrameFile{ fp, filename_idx, 0 };
  93         }
  94
  95         FrameFile &file = open_frame_files[stream_idx];
  96         unsigned filename_idx = file.filename_idx;
  97         string filename;
  98         {
  99                 lock_guard<mutex> lock(frame_mu);
 100                 filename = frame_filenames[filename_idx];
 101         }
 102
 103         FrameHeaderProto hdr;
 104         hdr.set_stream_idx(stream_idx);
 105         hdr.set_pts(pts);
 106         hdr.set_file_size(size);
 107
 108         string serialized;
 109         if (!hdr.SerializeToString(&serialized)) {
 110                 fprintf(stderr, "Frame header serialization failed.\n");
 111                 exit(1);
 112         }
 113         uint32_t len = htonl(serialized.size());
 114
 115         if (fwrite(frame_magic, frame_magic_len, 1, file.fp) != 1) {
 116                 perror("fwrite");
 117                 exit(1);
 118         }
 119         if (fwrite(&len, sizeof(len), 1, file.fp) != 1) {
 120                 perror("fwrite");
 121                 exit(1);
 122         }
 123         if (fwrite(serialized.data(), serialized.size(), 1, file.fp) != 1) {
 124                 perror("fwrite");
 125                 exit(1);
 126         }
 127         off_t offset = ftell(file.fp);
 128         if (fwrite(data, size, 1, file.fp) != 1) {
 129                 perror("fwrite");
 130                 exit(1);
 131         }
 132         fflush(file.fp);  // No fsync(), though. We can accept losing a few frames.
 133         global_disk_space_estimator->report_write(filename, 8 + sizeof(len) + serialized.size() + size, pts);
 134
 135         FrameOnDisk frame;
 136         frame.pts = pts;
 137         frame.filename_idx = filename_idx;
 138         frame.offset = offset;
 139         frame.size = size;
 140
 141         {
 142                 lock_guard<mutex> lock(frame_mu);
 143                 assert(stream_idx < MAX_STREAMS);
 144                 frames[stream_idx].push_back(frame);
 145         }
 146
 147         if (++file.frames_written_so_far >= 1000) {
 148                 size_t size = ftell(file.fp);
 149
 150                 // Start a new file next time.
 151                 if (fclose(file.fp) != 0) {
 152                         perror("fclose");
 153                         exit(1);
 154                 }
 155                 open_frame_files.erase(stream_idx);
 156
 157                 // Write information about all frames in the finished file to SQLite.
 158                 // (If we crash before getting to do this, we'll be scanning through
 159                 // the file on next startup, and adding it to the database then.)
 160                 // NOTE: Since we don't fsync(), we could in theory get broken data
 161                 // but with the right size, but it would seem unlikely.
 162                 vector<DB::FrameOnDiskAndStreamIdx> frames_this_file;
 163                 {
 164                         lock_guard<mutex> lock(frame_mu);
 165                         for (size_t stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 166                                 for (const FrameOnDisk &frame : frames[stream_idx]) {
 167                                         if (frame.filename_idx == filename_idx) {
 168                                                 frames_this_file.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(stream_idx) });
 169                                         }
 170                                 }
 171                         }
 172                 }
 173
 174                 const char *basename = filename.c_str();
 175                 while (strchr(basename, '/') != nullptr) {
 176                         basename = strchr(basename, '/') + 1;
 177                 }
 178                 db->store_frame_file(basename, size, frames_this_file);
 179         }
 180
 181         return frame;
 182 }
 183
 184 } // namespace
 185
 186 HTTPD *global_httpd;
 187
 188 void load_existing_frames();
 189 void record_thread_func();
 190
 191 int main(int argc, char **argv)
 192 {
 193         parse_flags(argc, argv);
 194         if (optind == argc) {
 195                 global_flags.stream_source = "multiangle.mp4";
 196                 global_flags.slow_down_input = true;
 197         } else if (optind + 1 == argc) {
 198                 global_flags.stream_source = argv[optind];
 199         } else {
 200                 usage();
 201                 exit(1);
 202         }
 203
 204         string frame_dir = global_flags.working_directory + "/frames";
 205
 206         if (mkdir(frame_dir.c_str(), 0777) == 0) {
 207                 fprintf(stderr, "%s does not exist, creating it.\n", frame_dir.c_str());
 208         } else if (errno != EEXIST) {
 209                 perror(global_flags.working_directory.c_str());
 210                 exit(1);
 211         }
 212
 213         avformat_network_init();
 214         global_httpd = new HTTPD;
 215
 216         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
 217
 218         QSurfaceFormat fmt;
 219         fmt.setDepthBufferSize(0);
 220         fmt.setStencilBufferSize(0);
 221         fmt.setProfile(QSurfaceFormat::CoreProfile);
 222         fmt.setMajorVersion(4);
 223         fmt.setMinorVersion(5);
 224
 225         // Turn off vsync, since Qt generally gives us at most frame rate
 226         // (display frequency) / (number of QGLWidgets active).
 227         fmt.setSwapInterval(0);
 228
 229         QSurfaceFormat::setDefaultFormat(fmt);
 230
 231         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
 232
 233         QApplication app(argc, argv);
 234         global_share_widget = new QGLWidget();
 235         if (!global_share_widget->isValid()) {
 236                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
 237                 exit(1);
 238         }
 239
 240         // Initialize Movit.
 241         {
 242                 QSurface *surface = create_surface();
 243                 QOpenGLContext *context = create_context(surface);
 244                 if (!make_current(context, surface)) {
 245                         printf("oops\n");
 246                         exit(1);
 247                 }
 248                 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
 249                 delete_context(context);
 250                 // TODO: Delete the surface, too.
 251         }
 252
 253         load_existing_frames();
 254
 255         MainWindow main_window;
 256         main_window.show();
 257
 258         global_httpd->add_endpoint("/queue_status", bind(&MainWindow::get_queue_status, &main_window), HTTPD::NO_CORS_POLICY);
 259         global_httpd->start(global_flags.http_port);
 260
 261         init_jpeg_vaapi();
 262
 263         thread record_thread(record_thread_func);
 264
 265         int ret = app.exec();
 266
 267         should_quit = true;
 268         record_thread.join();
 269         JPEGFrameView::shutdown();
 270
 271         return ret;
 272 }
 273
 274 void load_frame_file(const char *filename, const string &basename, unsigned filename_idx, DB *db)
 275 {
 276         struct stat st;
 277         if (stat(filename, &st) == -1) {
 278                 perror(filename);
 279                 exit(1);
 280         }
 281
 282         vector<DB::FrameOnDiskAndStreamIdx> all_frames = db->load_frame_file(basename, st.st_size, filename_idx);
 283         if (!all_frames.empty()) {
 284                 // We already had this cached in the database, so no need to look in the file.
 285                 for (const DB::FrameOnDiskAndStreamIdx &frame : all_frames) {
 286                         if (frame.stream_idx < MAX_STREAMS) {
 287                                 frames[frame.stream_idx].push_back(frame.frame);
 288                                 start_pts = max(start_pts, frame.frame.pts);
 289                         }
 290                 }
 291                 return;
 292         }
 293
 294         FILE *fp = fopen(filename, "rb");
 295         if (fp == nullptr) {
 296                 perror(filename);
 297                 exit(1);
 298         }
 299
 300         size_t magic_offset = 0;
 301         size_t skipped_bytes = 0;
 302         while (!feof(fp) && !ferror(fp)) {
 303                 int ch = getc(fp);
 304                 if (ch == -1) {
 305                         break;
 306                 }
 307                 if (ch != frame_magic[magic_offset++]) {
 308                         skipped_bytes += magic_offset;
 309                         magic_offset = 0;
 310                         continue;
 311                 }
 312                 if (magic_offset < frame_magic_len) {
 313                         // Still reading the magic (hopefully).
 314                         continue;
 315                 }
 316
 317                 // OK, found the magic. Try to parse the frame header.
 318                 magic_offset = 0;
 319
 320                 if (skipped_bytes > 0)  {
 321                         fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes in the middle.\n",
 322                                 filename, skipped_bytes);
 323                         skipped_bytes = 0;
 324                 }
 325
 326                 uint32_t len;
 327                 if (fread(&len, sizeof(len), 1, fp) != 1) {
 328                         fprintf(stderr, "WARNING: %s: Short read when getting length.\n", filename);
 329                         break;
 330                 }
 331
 332                 string serialized;
 333                 serialized.resize(ntohl(len));
 334                 if (fread(&serialized[0], serialized.size(), 1, fp) != 1) {
 335                         fprintf(stderr, "WARNING: %s: Short read when reading frame header (%zu bytes).\n", filename, serialized.size());
 336                         break;
 337                 }
 338
 339                 FrameHeaderProto hdr;
 340                 if (!hdr.ParseFromString(serialized)) {
 341                         fprintf(stderr, "WARNING: %s: Corrupted frame header.\n", filename);
 342                         continue;
 343                 }
 344
 345                 FrameOnDisk frame;
 346                 frame.pts = hdr.pts();
 347                 frame.offset = ftell(fp);
 348                 if (frame.offset == -1) {
 349                         fprintf(stderr, "WARNING: %s: ftell() failed (%s).\n", filename, strerror(errno));
 350                         break;
 351                 }
 352                 frame.filename_idx = filename_idx;
 353                 frame.size = hdr.file_size();
 354
 355                 if (fseek(fp, frame.offset + frame.size, SEEK_SET) == -1) {
 356                         fprintf(stderr, "WARNING: %s: Could not seek past frame (probably truncated).\n", filename);
 357                         continue;
 358                 }
 359
 360                 if (hdr.stream_idx() >= 0 && hdr.stream_idx() < MAX_STREAMS) {
 361                         frames[hdr.stream_idx()].push_back(frame);
 362                         start_pts = max(start_pts, hdr.pts());
 363                 }
 364                 all_frames.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(hdr.stream_idx()) });
 365         }
 366
 367         if (skipped_bytes > 0) {
 368                 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes at the end.\n",
 369                         filename, skipped_bytes);
 370         }
 371
 372         off_t size = ftell(fp);
 373         fclose(fp);
 374
 375         if (size == -1) {
 376                 fprintf(stderr, "WARNING: %s: ftell() failed (%s).\n", filename, strerror(errno));
 377                 return;
 378         }
 379
 380         db->store_frame_file(basename, size, all_frames);
 381 }
 382
 383 void load_existing_frames()
 384 {
 385         QProgressDialog progress("Scanning frame directory...", "Abort", 0, 1);
 386         progress.setWindowTitle("Futatabi");
 387         progress.setWindowModality(Qt::WindowModal);
 388         progress.setMinimumDuration(1000);
 389         progress.setMaximum(1);
 390         progress.setValue(0);
 391
 392         string frame_dir = global_flags.working_directory + "/frames";
 393         DIR *dir = opendir(frame_dir.c_str());
 394         if (dir == nullptr) {
 395                 perror("frames/");
 396                 start_pts = 0;
 397                 return;
 398         }
 399
 400         vector<string> frame_basenames;
 401         for ( ;; ) {
 402                 errno = 0;
 403                 dirent *de = readdir(dir);
 404                 if (de == nullptr) {
 405                         if (errno != 0) {
 406                                 perror("readdir");
 407                                 exit(1);
 408                         }
 409                         break;
 410                 }
 411
 412                 if (de->d_type == DT_REG || de->d_type == DT_LNK) {
 413                         string filename = frame_dir + "/" + de->d_name;
 414                         frame_filenames.push_back(filename);
 415                         frame_basenames.push_back(de->d_name);
 416                 }
 417
 418                 if (progress.wasCanceled()) {
 419                         exit(1);
 420                 }
 421         }
 422         closedir(dir);
 423
 424         progress.setMaximum(frame_filenames.size() + 2);
 425         progress.setValue(1);
 426
 427         progress.setLabelText("Opening database...");
 428         DB db(global_flags.working_directory + "/futatabi.db");
 429
 430         progress.setLabelText("Reading frame files...");
 431         progress.setValue(2);
 432
 433         for (size_t i = 0; i < frame_filenames.size(); ++i) {
 434                 load_frame_file(frame_filenames[i].c_str(), frame_basenames[i], i, &db);
 435                 progress.setValue(i + 3);
 436                 if (progress.wasCanceled()) {
 437                         exit(1);
 438                 }
 439         }
 440
 441         if (start_pts == -1) {
 442                 start_pts = 0;
 443         } else {
 444                 // Add a gap of one second from the old frames to the new ones.
 445                 start_pts += TIMEBASE;
 446         }
 447         current_pts = start_pts;
 448
 449         for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 450                 sort(frames[stream_idx].begin(), frames[stream_idx].end(),
 451                         [](const auto &a, const auto &b) { return a.pts < b.pts; });
 452         }
 453
 454         db.clean_unused_frame_files(frame_basenames);
 455 }
 456
 457 void record_thread_func()
 458 {
 459         for (unsigned i = 0; i < MAX_STREAMS; ++i) {
 460                 global_metrics.add("received_frames", {{ "stream", to_string(i) }}, &metric_received_frames[i]);
 461         }
 462
 463         if (global_flags.stream_source.empty() || global_flags.stream_source == "/dev/null") {
 464                 // Save the user from some repetitive messages.
 465                 return;
 466         }
 467
 468         pthread_setname_np(pthread_self(), "ReceiveFrames");
 469
 470         int64_t pts_offset = 0;  // Needs to be initialized due to a spurious GCC warning.
 471         DB db(global_flags.working_directory + "/futatabi.db");
 472
 473         while (!should_quit.load()) {
 474                 auto format_ctx = avformat_open_input_unique(global_flags.stream_source.c_str(), nullptr, nullptr);
 475                 if (format_ctx == nullptr) {
 476                         fprintf(stderr, "%s: Error opening file. Waiting one second and trying again...\n", global_flags.stream_source.c_str());
 477                         sleep(1);
 478                         continue;
 479                 }
 480
 481                 int64_t last_pts = -1;
 482
 483                 while (!should_quit.load()) {
 484                         AVPacket pkt;
 485                         unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
 486                                 &pkt, av_packet_unref);
 487                         av_init_packet(&pkt);
 488                         pkt.data = nullptr;
 489                         pkt.size = 0;
 490
 491                         // TODO: Make it possible to abort av_read_frame() (use an interrupt callback);
 492                         // right now, should_quit will be ignored if it's hung on I/O.
 493                         if (av_read_frame(format_ctx.get(), &pkt) != 0) {
 494                                 break;
 495                         }
 496                         if (pkt.stream_index >= MAX_STREAMS) {
 497                                 continue;
 498                         }
 499
 500                         ++metric_received_frames[pkt.stream_index];
 501
 502                         // Convert pts to our own timebase.
 503                         AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
 504                         int64_t pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
 505
 506                         // Translate offset into our stream.
 507                         if (last_pts == -1) {
 508                                 pts_offset = start_pts - pts;
 509                         }
 510                         pts = std::max(pts + pts_offset, start_pts);
 511
 512                         //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
 513                         //      pkt.stream_index, pts, pkt.size);
 514                         FrameOnDisk frame = write_frame(pkt.stream_index, pts, pkt.data, pkt.size, &db);
 515
 516                         post_to_main_thread([pkt, frame] {
 517                                 global_mainwindow->display_frame(pkt.stream_index, frame);
 518                         });
 519
 520                         if (last_pts != -1 && global_flags.slow_down_input) {
 521                                 this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));
 522                         }
 523                         last_pts = pts;
 524                         current_pts = pts;
 525                 }
 526
 527                 fprintf(stderr, "%s: Hit EOF. Waiting one second and trying again...\n", global_flags.stream_source.c_str());
 528                 sleep(1);
 529
 530                 start_pts = last_pts + TIMEBASE;
 531         }
 532 }