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

   1 #include <arpa/inet.h>
   2 #include <assert.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 "defs.h"
  25 #include "flags.h"
  26 #include "frame.pb.h"
  27 #include "frame_on_disk.h"
  28 #include "mainwindow.h"
  29 #include "player.h"
  30 #include "shared/context.h"
  31 #include "shared/disk_space_estimator.h"
  32 #include "shared/ffmpeg_raii.h"
  33 #include "shared/httpd.h"
  34 #include "shared/metrics.h"
  35 #include "shared/post_to_main_thread.h"
  36 #include "shared/ref_counted_gl_sync.h"
  37 #include "shared/timebase.h"
  38 #include "ui_mainwindow.h"
  39 #include "vaapi_jpeg_decoder.h"
  40
  41 #include <QApplication>
  42 #include <QGLFormat>
  43 #include <QProgressDialog>
  44 #include <QSurfaceFormat>
  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 Summary metric_received_frame_size_bytes;
  75
  76 namespace {
  77
  78 FrameOnDisk write_frame(int stream_idx, int64_t pts, const uint8_t *data, size_t size, DB *db)
  79 {
  80         if (open_frame_files.count(stream_idx) == 0) {
  81                 char filename[256];
  82                 snprintf(filename, sizeof(filename), "%s/frames/cam%d-pts%09ld.frames",
  83                          global_flags.working_directory.c_str(), stream_idx, pts);
  84                 FILE *fp = fopen(filename, "wb");
  85                 if (fp == nullptr) {
  86                         perror(filename);
  87                         exit(1);
  88                 }
  89
  90                 lock_guard<mutex> lock(frame_mu);
  91                 unsigned filename_idx = frame_filenames.size();
  92                 frame_filenames.push_back(filename);
  93                 open_frame_files[stream_idx] = FrameFile{ fp, filename_idx, 0 };
  94         }
  95
  96         FrameFile &file = open_frame_files[stream_idx];
  97         unsigned filename_idx = file.filename_idx;
  98         string filename;
  99         {
 100                 lock_guard<mutex> lock(frame_mu);
 101                 filename = frame_filenames[filename_idx];
 102         }
 103
 104         FrameHeaderProto hdr;
 105         hdr.set_stream_idx(stream_idx);
 106         hdr.set_pts(pts);
 107         hdr.set_file_size(size);
 108
 109         string serialized;
 110         if (!hdr.SerializeToString(&serialized)) {
 111                 fprintf(stderr, "Frame header serialization failed.\n");
 112                 exit(1);
 113         }
 114         uint32_t len = htonl(serialized.size());
 115
 116         if (fwrite(frame_magic, frame_magic_len, 1, file.fp) != 1) {
 117                 perror("fwrite");
 118                 exit(1);
 119         }
 120         if (fwrite(&len, sizeof(len), 1, file.fp) != 1) {
 121                 perror("fwrite");
 122                 exit(1);
 123         }
 124         if (fwrite(serialized.data(), serialized.size(), 1, file.fp) != 1) {
 125                 perror("fwrite");
 126                 exit(1);
 127         }
 128         off_t offset = ftell(file.fp);
 129         if (fwrite(data, size, 1, file.fp) != 1) {
 130                 perror("fwrite");
 131                 exit(1);
 132         }
 133         fflush(file.fp);  // No fsync(), though. We can accept losing a few frames.
 134         global_disk_space_estimator->report_write(filename, 8 + sizeof(len) + serialized.size() + size, pts);
 135
 136         FrameOnDisk frame;
 137         frame.pts = pts;
 138         frame.filename_idx = filename_idx;
 139         frame.offset = offset;
 140         frame.size = size;
 141
 142         {
 143                 lock_guard<mutex> lock(frame_mu);
 144                 assert(stream_idx < MAX_STREAMS);
 145                 frames[stream_idx].push_back(frame);
 146         }
 147
 148         if (++file.frames_written_so_far >= FRAMES_PER_FILE) {
 149                 size_t size = ftell(file.fp);
 150
 151                 // Start a new file next time.
 152                 if (fclose(file.fp) != 0) {
 153                         perror("fclose");
 154                         exit(1);
 155                 }
 156                 open_frame_files.erase(stream_idx);
 157
 158                 // Write information about all frames in the finished file to SQLite.
 159                 // (If we crash before getting to do this, we'll be scanning through
 160                 // the file on next startup, and adding it to the database then.)
 161                 // NOTE: Since we don't fsync(), we could in theory get broken data
 162                 // but with the right size, but it would seem unlikely.
 163                 vector<DB::FrameOnDiskAndStreamIdx> frames_this_file;
 164                 {
 165                         lock_guard<mutex> lock(frame_mu);
 166                         for (size_t stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 167                                 for (const FrameOnDisk &frame : frames[stream_idx]) {
 168                                         if (frame.filename_idx == filename_idx) {
 169                                                 frames_this_file.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(stream_idx) });
 170                                         }
 171                                 }
 172                         }
 173                 }
 174
 175                 const char *basename = filename.c_str();
 176                 while (strchr(basename, '/') != nullptr) {
 177                         basename = strchr(basename, '/') + 1;
 178                 }
 179                 db->store_frame_file(basename, size, frames_this_file);
 180         }
 181
 182         return frame;
 183 }
 184
 185 }  // namespace
 186
 187 HTTPD *global_httpd;
 188
 189 void load_existing_frames();
 190 void record_thread_func();
 191
 192 int main(int argc, char **argv)
 193 {
 194         parse_flags(argc, argv);
 195         if (optind == argc) {
 196                 global_flags.stream_source = "multiangle.mp4";
 197                 global_flags.slow_down_input = true;
 198         } else if (optind + 1 == argc) {
 199                 global_flags.stream_source = argv[optind];
 200         } else {
 201                 usage();
 202                 exit(1);
 203         }
 204
 205         string frame_dir = global_flags.working_directory + "/frames";
 206
 207         if (mkdir(frame_dir.c_str(), 0777) == 0) {
 208                 fprintf(stderr, "%s does not exist, creating it.\n", frame_dir.c_str());
 209         } else if (errno != EEXIST) {
 210                 perror(global_flags.working_directory.c_str());
 211                 exit(1);
 212         }
 213
 214         avformat_network_init();
 215         global_metrics.set_prefix("futatabi");
 216         global_httpd = new HTTPD;
 217         global_metrics.remove("num_connected_multicam_clients");
 218
 219         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
 220
 221         QSurfaceFormat fmt;
 222         fmt.setDepthBufferSize(0);
 223         fmt.setStencilBufferSize(0);
 224         fmt.setProfile(QSurfaceFormat::CoreProfile);
 225         fmt.setMajorVersion(4);
 226         fmt.setMinorVersion(5);
 227
 228         // Turn off vsync, since Qt generally gives us at most frame rate
 229         // (display frequency) / (number of QGLWidgets active).
 230         fmt.setSwapInterval(0);
 231
 232         QSurfaceFormat::setDefaultFormat(fmt);
 233
 234         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
 235
 236         QApplication app(argc, argv);
 237         global_share_widget = new QGLWidget();
 238         if (!global_share_widget->isValid()) {
 239                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
 240                 exit(1);
 241         }
 242
 243         // Initialize Movit.
 244         {
 245                 QSurface *surface = create_surface();
 246                 QOpenGLContext *context = create_context(surface);
 247                 if (!make_current(context, surface)) {
 248                         printf("oops\n");
 249                         exit(1);
 250                 }
 251                 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
 252                 delete_context(context);
 253                 // TODO: Delete the surface, too.
 254         }
 255
 256         load_existing_frames();
 257
 258         for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 259                 if (!frames[stream_idx].empty()) {
 260                         assert(start_pts > frames[stream_idx].back().pts);
 261                 }
 262         }
 263
 264         MainWindow main_window;
 265         main_window.show();
 266
 267         global_httpd->add_endpoint("/queue_status", bind(&MainWindow::get_queue_status, &main_window), HTTPD::NO_CORS_POLICY);
 268         global_httpd->start(global_flags.http_port);
 269
 270         init_jpeg_vaapi();
 271
 272         thread record_thread(record_thread_func);
 273
 274         int ret = app.exec();
 275
 276         should_quit = true;
 277         record_thread.join();
 278         JPEGFrameView::shutdown();
 279
 280         return ret;
 281 }
 282
 283 void load_frame_file(const char *filename, const string &basename, unsigned filename_idx, DB *db)
 284 {
 285         struct stat st;
 286         if (stat(filename, &st) == -1) {
 287                 perror(filename);
 288                 exit(1);
 289         }
 290
 291         vector<DB::FrameOnDiskAndStreamIdx> all_frames = db->load_frame_file(basename, st.st_size, filename_idx);
 292         if (!all_frames.empty()) {
 293                 // We already had this cached in the database, so no need to look in the file.
 294                 for (const DB::FrameOnDiskAndStreamIdx &frame : all_frames) {
 295                         if (frame.stream_idx < MAX_STREAMS) {
 296                                 frames[frame.stream_idx].push_back(frame.frame);
 297                                 start_pts = max(start_pts, frame.frame.pts);
 298                         }
 299                 }
 300                 return;
 301         }
 302
 303         FILE *fp = fopen(filename, "rb");
 304         if (fp == nullptr) {
 305                 perror(filename);
 306                 exit(1);
 307         }
 308
 309         size_t magic_offset = 0;
 310         size_t skipped_bytes = 0;
 311         while (!feof(fp) && !ferror(fp)) {
 312                 int ch = getc(fp);
 313                 if (ch == -1) {
 314                         break;
 315                 }
 316                 if (ch != frame_magic[magic_offset++]) {
 317                         skipped_bytes += magic_offset;
 318                         magic_offset = 0;
 319                         continue;
 320                 }
 321                 if (magic_offset < frame_magic_len) {
 322                         // Still reading the magic (hopefully).
 323                         continue;
 324                 }
 325
 326                 // OK, found the magic. Try to parse the frame header.
 327                 magic_offset = 0;
 328
 329                 if (skipped_bytes > 0) {
 330                         fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes in the middle.\n",
 331                                 filename, skipped_bytes);
 332                         skipped_bytes = 0;
 333                 }
 334
 335                 uint32_t len;
 336                 if (fread(&len, sizeof(len), 1, fp) != 1) {
 337                         fprintf(stderr, "WARNING: %s: Short read when getting length.\n", filename);
 338                         break;
 339                 }
 340
 341                 string serialized;
 342                 serialized.resize(ntohl(len));
 343                 if (fread(&serialized[0], serialized.size(), 1, fp) != 1) {
 344                         fprintf(stderr, "WARNING: %s: Short read when reading frame header (%zu bytes).\n", filename, serialized.size());
 345                         break;
 346                 }
 347
 348                 FrameHeaderProto hdr;
 349                 if (!hdr.ParseFromString(serialized)) {
 350                         fprintf(stderr, "WARNING: %s: Corrupted frame header.\n", filename);
 351                         continue;
 352                 }
 353
 354                 FrameOnDisk frame;
 355                 frame.pts = hdr.pts();
 356                 frame.offset = ftell(fp);
 357                 if (frame.offset == -1) {
 358                         fprintf(stderr, "WARNING: %s: ftell() failed (%s).\n", filename, strerror(errno));
 359                         break;
 360                 }
 361                 frame.filename_idx = filename_idx;
 362                 frame.size = hdr.file_size();
 363
 364                 if (fseek(fp, frame.offset + frame.size, SEEK_SET) == -1) {
 365                         fprintf(stderr, "WARNING: %s: Could not seek past frame (probably truncated).\n", filename);
 366                         continue;
 367                 }
 368
 369                 if (hdr.stream_idx() >= 0 && hdr.stream_idx() < MAX_STREAMS) {
 370                         frames[hdr.stream_idx()].push_back(frame);
 371                         start_pts = max(start_pts, hdr.pts());
 372                 }
 373                 all_frames.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(hdr.stream_idx()) });
 374         }
 375
 376         if (skipped_bytes > 0) {
 377                 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes at the end.\n",
 378                         filename, skipped_bytes);
 379         }
 380
 381         off_t size = ftell(fp);
 382         fclose(fp);
 383
 384         if (size == -1) {
 385                 fprintf(stderr, "WARNING: %s: ftell() failed (%s).\n", filename, strerror(errno));
 386                 return;
 387         }
 388
 389         db->store_frame_file(basename, size, all_frames);
 390 }
 391
 392 void load_existing_frames()
 393 {
 394         QProgressDialog progress("Scanning frame directory...", "Abort", 0, 1);
 395         progress.setWindowTitle("Futatabi");
 396         progress.setWindowModality(Qt::WindowModal);
 397         progress.setMinimumDuration(1000);
 398         progress.setMaximum(1);
 399         progress.setValue(0);
 400
 401         string frame_dir = global_flags.working_directory + "/frames";
 402         DIR *dir = opendir(frame_dir.c_str());
 403         if (dir == nullptr) {
 404                 perror("frames/");
 405                 start_pts = 0;
 406                 return;
 407         }
 408
 409         vector<string> frame_basenames;
 410         for (;;) {
 411                 errno = 0;
 412                 dirent *de = readdir(dir);
 413                 if (de == nullptr) {
 414                         if (errno != 0) {
 415                                 perror("readdir");
 416                                 exit(1);
 417                         }
 418                         break;
 419                 }
 420
 421                 if (de->d_type == DT_REG || de->d_type == DT_LNK) {
 422                         string filename = frame_dir + "/" + de->d_name;
 423                         frame_filenames.push_back(filename);
 424                         frame_basenames.push_back(de->d_name);
 425                 }
 426
 427                 if (progress.wasCanceled()) {
 428                         exit(1);
 429                 }
 430         }
 431         closedir(dir);
 432
 433         progress.setMaximum(frame_filenames.size() + 2);
 434         progress.setValue(1);
 435
 436         progress.setLabelText("Opening database...");
 437         DB db(global_flags.working_directory + "/futatabi.db");
 438
 439         progress.setLabelText("Reading frame files...");
 440         progress.setValue(2);
 441
 442         for (size_t i = 0; i < frame_filenames.size(); ++i) {
 443                 load_frame_file(frame_filenames[i].c_str(), frame_basenames[i], i, &db);
 444                 progress.setValue(i + 3);
 445                 if (progress.wasCanceled()) {
 446                         exit(1);
 447                 }
 448         }
 449
 450         if (start_pts == -1) {
 451                 start_pts = 0;
 452         } else {
 453                 // Add a gap of one second from the old frames to the new ones.
 454                 start_pts += TIMEBASE;
 455         }
 456         current_pts = start_pts;
 457
 458         for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 459                 sort(frames[stream_idx].begin(), frames[stream_idx].end(),
 460                      [](const auto &a, const auto &b) { return a.pts < b.pts; });
 461         }
 462
 463         db.clean_unused_frame_files(frame_basenames);
 464 }
 465
 466 void record_thread_func()
 467 {
 468         for (unsigned i = 0; i < MAX_STREAMS; ++i) {
 469                 global_metrics.add("received_frames", { { "stream", to_string(i) } }, &metric_received_frames[i]);
 470         }
 471         global_metrics.add("received_frame_size_bytes", &metric_received_frame_size_bytes);
 472
 473         if (global_flags.stream_source.empty() || global_flags.stream_source == "/dev/null") {
 474                 // Save the user from some repetitive messages.
 475                 return;
 476         }
 477
 478         pthread_setname_np(pthread_self(), "ReceiveFrames");
 479
 480         int64_t pts_offset = 0;  // Needs to be initialized due to a spurious GCC warning.
 481         DB db(global_flags.working_directory + "/futatabi.db");
 482
 483         while (!should_quit.load()) {
 484                 auto format_ctx = avformat_open_input_unique(global_flags.stream_source.c_str(), nullptr, nullptr);
 485                 if (format_ctx == nullptr) {
 486                         fprintf(stderr, "%s: Error opening file. Waiting one second and trying again...\n", global_flags.stream_source.c_str());
 487                         sleep(1);
 488                         continue;
 489                 }
 490
 491                 int64_t last_pts = -1;
 492
 493                 while (!should_quit.load()) {
 494                         AVPacket pkt;
 495                         unique_ptr<AVPacket, decltype(av_packet_unref) *> pkt_cleanup(
 496                                 &pkt, av_packet_unref);
 497                         av_init_packet(&pkt);
 498                         pkt.data = nullptr;
 499                         pkt.size = 0;
 500
 501                         // TODO: Make it possible to abort av_read_frame() (use an interrupt callback);
 502                         // right now, should_quit will be ignored if it's hung on I/O.
 503                         if (av_read_frame(format_ctx.get(), &pkt) != 0) {
 504                                 break;
 505                         }
 506                         if (pkt.stream_index >= MAX_STREAMS) {
 507                                 continue;
 508                         }
 509
 510                         ++metric_received_frames[pkt.stream_index];
 511                         metric_received_frame_size_bytes.count_event(pkt.size);
 512
 513                         // Convert pts to our own timebase.
 514                         AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
 515                         int64_t pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
 516
 517                         // Translate offset into our stream.
 518                         if (last_pts == -1) {
 519                                 pts_offset = start_pts - pts;
 520                         }
 521                         pts = std::max(pts + pts_offset, start_pts);
 522
 523                         //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
 524                         //      pkt.stream_index, pts, pkt.size);
 525                         FrameOnDisk frame = write_frame(pkt.stream_index, pts, pkt.data, pkt.size, &db);
 526
 527                         post_to_main_thread([pkt, frame] {
 528                                 global_mainwindow->display_frame(pkt.stream_index, frame);
 529                         });
 530
 531                         if (last_pts != -1 && global_flags.slow_down_input) {
 532                                 this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));
 533                         }
 534                         last_pts = pts;
 535                         current_pts = pts;
 536                 }
 537
 538                 fprintf(stderr, "%s: Hit EOF. Waiting one second and trying again...\n", global_flags.stream_source.c_str());
 539                 sleep(1);
 540
 541                 start_pts = last_pts + TIMEBASE;
 542         }
 543 }