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_metrics.set_prefix("futatabi");
 215         global_httpd = new HTTPD;
 216
 217         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
 218
 219         QSurfaceFormat fmt;
 220         fmt.setDepthBufferSize(0);
 221         fmt.setStencilBufferSize(0);
 222         fmt.setProfile(QSurfaceFormat::CoreProfile);
 223         fmt.setMajorVersion(4);
 224         fmt.setMinorVersion(5);
 225
 226         // Turn off vsync, since Qt generally gives us at most frame rate
 227         // (display frequency) / (number of QGLWidgets active).
 228         fmt.setSwapInterval(0);
 229
 230         QSurfaceFormat::setDefaultFormat(fmt);
 231
 232         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
 233
 234         QApplication app(argc, argv);
 235         global_share_widget = new QGLWidget();
 236         if (!global_share_widget->isValid()) {
 237                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
 238                 exit(1);
 239         }
 240
 241         // Initialize Movit.
 242         {
 243                 QSurface *surface = create_surface();
 244                 QOpenGLContext *context = create_context(surface);
 245                 if (!make_current(context, surface)) {
 246                         printf("oops\n");
 247                         exit(1);
 248                 }
 249                 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
 250                 delete_context(context);
 251                 // TODO: Delete the surface, too.
 252         }
 253
 254         load_existing_frames();
 255
 256         MainWindow main_window;
 257         main_window.show();
 258
 259         global_httpd->add_endpoint("/queue_status", bind(&MainWindow::get_queue_status, &main_window), HTTPD::NO_CORS_POLICY);
 260         global_httpd->start(global_flags.http_port);
 261
 262         init_jpeg_vaapi();
 263
 264         thread record_thread(record_thread_func);
 265
 266         int ret = app.exec();
 267
 268         should_quit = true;
 269         record_thread.join();
 270         JPEGFrameView::shutdown();
 271
 272         return ret;
 273 }
 274
 275 void load_frame_file(const char *filename, const string &basename, unsigned filename_idx, DB *db)
 276 {
 277         struct stat st;
 278         if (stat(filename, &st) == -1) {
 279                 perror(filename);
 280                 exit(1);
 281         }
 282
 283         vector<DB::FrameOnDiskAndStreamIdx> all_frames = db->load_frame_file(basename, st.st_size, filename_idx);
 284         if (!all_frames.empty()) {
 285                 // We already had this cached in the database, so no need to look in the file.
 286                 for (const DB::FrameOnDiskAndStreamIdx &frame : all_frames) {
 287                         if (frame.stream_idx < MAX_STREAMS) {
 288                                 frames[frame.stream_idx].push_back(frame.frame);
 289                                 start_pts = max(start_pts, frame.frame.pts);
 290                         }
 291                 }
 292                 return;
 293         }
 294
 295         FILE *fp = fopen(filename, "rb");
 296         if (fp == nullptr) {
 297                 perror(filename);
 298                 exit(1);
 299         }
 300
 301         size_t magic_offset = 0;
 302         size_t skipped_bytes = 0;
 303         while (!feof(fp) && !ferror(fp)) {
 304                 int ch = getc(fp);
 305                 if (ch == -1) {
 306                         break;
 307                 }
 308                 if (ch != frame_magic[magic_offset++]) {
 309                         skipped_bytes += magic_offset;
 310                         magic_offset = 0;
 311                         continue;
 312                 }
 313                 if (magic_offset < frame_magic_len) {
 314                         // Still reading the magic (hopefully).
 315                         continue;
 316                 }
 317
 318                 // OK, found the magic. Try to parse the frame header.
 319                 magic_offset = 0;
 320
 321                 if (skipped_bytes > 0)  {
 322                         fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes in the middle.\n",
 323                                 filename, skipped_bytes);
 324                         skipped_bytes = 0;
 325                 }
 326
 327                 uint32_t len;
 328                 if (fread(&len, sizeof(len), 1, fp) != 1) {
 329                         fprintf(stderr, "WARNING: %s: Short read when getting length.\n", filename);
 330                         break;
 331                 }
 332
 333                 string serialized;
 334                 serialized.resize(ntohl(len));
 335                 if (fread(&serialized[0], serialized.size(), 1, fp) != 1) {
 336                         fprintf(stderr, "WARNING: %s: Short read when reading frame header (%zu bytes).\n", filename, serialized.size());
 337                         break;
 338                 }
 339
 340                 FrameHeaderProto hdr;
 341                 if (!hdr.ParseFromString(serialized)) {
 342                         fprintf(stderr, "WARNING: %s: Corrupted frame header.\n", filename);
 343                         continue;
 344                 }
 345
 346                 FrameOnDisk frame;
 347                 frame.pts = hdr.pts();
 348                 frame.offset = ftell(fp);
 349                 if (frame.offset == -1) {
 350                         fprintf(stderr, "WARNING: %s: ftell() failed (%s).\n", filename, strerror(errno));
 351                         break;
 352                 }
 353                 frame.filename_idx = filename_idx;
 354                 frame.size = hdr.file_size();
 355
 356                 if (fseek(fp, frame.offset + frame.size, SEEK_SET) == -1) {
 357                         fprintf(stderr, "WARNING: %s: Could not seek past frame (probably truncated).\n", filename);
 358                         continue;
 359                 }
 360
 361                 if (hdr.stream_idx() >= 0 && hdr.stream_idx() < MAX_STREAMS) {
 362                         frames[hdr.stream_idx()].push_back(frame);
 363                         start_pts = max(start_pts, hdr.pts());
 364                 }
 365                 all_frames.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(hdr.stream_idx()) });
 366         }
 367
 368         if (skipped_bytes > 0) {
 369                 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes at the end.\n",
 370                         filename, skipped_bytes);
 371         }
 372
 373         off_t size = ftell(fp);
 374         fclose(fp);
 375
 376         if (size == -1) {
 377                 fprintf(stderr, "WARNING: %s: ftell() failed (%s).\n", filename, strerror(errno));
 378                 return;
 379         }
 380
 381         db->store_frame_file(basename, size, all_frames);
 382 }
 383
 384 void load_existing_frames()
 385 {
 386         QProgressDialog progress("Scanning frame directory...", "Abort", 0, 1);
 387         progress.setWindowTitle("Futatabi");
 388         progress.setWindowModality(Qt::WindowModal);
 389         progress.setMinimumDuration(1000);
 390         progress.setMaximum(1);
 391         progress.setValue(0);
 392
 393         string frame_dir = global_flags.working_directory + "/frames";
 394         DIR *dir = opendir(frame_dir.c_str());
 395         if (dir == nullptr) {
 396                 perror("frames/");
 397                 start_pts = 0;
 398                 return;
 399         }
 400
 401         vector<string> frame_basenames;
 402         for ( ;; ) {
 403                 errno = 0;
 404                 dirent *de = readdir(dir);
 405                 if (de == nullptr) {
 406                         if (errno != 0) {
 407                                 perror("readdir");
 408                                 exit(1);
 409                         }
 410                         break;
 411                 }
 412
 413                 if (de->d_type == DT_REG || de->d_type == DT_LNK) {
 414                         string filename = frame_dir + "/" + de->d_name;
 415                         frame_filenames.push_back(filename);
 416                         frame_basenames.push_back(de->d_name);
 417                 }
 418
 419                 if (progress.wasCanceled()) {
 420                         exit(1);
 421                 }
 422         }
 423         closedir(dir);
 424
 425         progress.setMaximum(frame_filenames.size() + 2);
 426         progress.setValue(1);
 427
 428         progress.setLabelText("Opening database...");
 429         DB db(global_flags.working_directory + "/futatabi.db");
 430
 431         progress.setLabelText("Reading frame files...");
 432         progress.setValue(2);
 433
 434         for (size_t i = 0; i < frame_filenames.size(); ++i) {
 435                 load_frame_file(frame_filenames[i].c_str(), frame_basenames[i], i, &db);
 436                 progress.setValue(i + 3);
 437                 if (progress.wasCanceled()) {
 438                         exit(1);
 439                 }
 440         }
 441
 442         if (start_pts == -1) {
 443                 start_pts = 0;
 444         } else {
 445                 // Add a gap of one second from the old frames to the new ones.
 446                 start_pts += TIMEBASE;
 447         }
 448         current_pts = start_pts;
 449
 450         for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 451                 sort(frames[stream_idx].begin(), frames[stream_idx].end(),
 452                         [](const auto &a, const auto &b) { return a.pts < b.pts; });
 453         }
 454
 455         db.clean_unused_frame_files(frame_basenames);
 456 }
 457
 458 void record_thread_func()
 459 {
 460         for (unsigned i = 0; i < MAX_STREAMS; ++i) {
 461                 global_metrics.add("received_frames", {{ "stream", to_string(i) }}, &metric_received_frames[i]);
 462         }
 463
 464         if (global_flags.stream_source.empty() || global_flags.stream_source == "/dev/null") {
 465                 // Save the user from some repetitive messages.
 466                 return;
 467         }
 468
 469         pthread_setname_np(pthread_self(), "ReceiveFrames");
 470
 471         int64_t pts_offset = 0;  // Needs to be initialized due to a spurious GCC warning.
 472         DB db(global_flags.working_directory + "/futatabi.db");
 473
 474         while (!should_quit.load()) {
 475                 auto format_ctx = avformat_open_input_unique(global_flags.stream_source.c_str(), nullptr, nullptr);
 476                 if (format_ctx == nullptr) {
 477                         fprintf(stderr, "%s: Error opening file. Waiting one second and trying again...\n", global_flags.stream_source.c_str());
 478                         sleep(1);
 479                         continue;
 480                 }
 481
 482                 int64_t last_pts = -1;
 483
 484                 while (!should_quit.load()) {
 485                         AVPacket pkt;
 486                         unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
 487                                 &pkt, av_packet_unref);
 488                         av_init_packet(&pkt);
 489                         pkt.data = nullptr;
 490                         pkt.size = 0;
 491
 492                         // TODO: Make it possible to abort av_read_frame() (use an interrupt callback);
 493                         // right now, should_quit will be ignored if it's hung on I/O.
 494                         if (av_read_frame(format_ctx.get(), &pkt) != 0) {
 495                                 break;
 496                         }
 497                         if (pkt.stream_index >= MAX_STREAMS) {
 498                                 continue;
 499                         }
 500
 501                         ++metric_received_frames[pkt.stream_index];
 502
 503                         // Convert pts to our own timebase.
 504                         AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
 505                         int64_t pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
 506
 507                         // Translate offset into our stream.
 508                         if (last_pts == -1) {
 509                                 pts_offset = start_pts - pts;
 510                         }
 511                         pts = std::max(pts + pts_offset, start_pts);
 512
 513                         //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
 514                         //      pkt.stream_index, pts, pkt.size);
 515                         FrameOnDisk frame = write_frame(pkt.stream_index, pts, pkt.data, pkt.size, &db);
 516
 517                         post_to_main_thread([pkt, frame] {
 518                                 global_mainwindow->display_frame(pkt.stream_index, frame);
 519                         });
 520
 521                         if (last_pts != -1 && global_flags.slow_down_input) {
 522                                 this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));
 523                         }
 524                         last_pts = pts;
 525                         current_pts = pts;
 526                 }
 527
 528                 fprintf(stderr, "%s: Hit EOF. Waiting one second and trying again...\n", global_flags.stream_source.c_str());
 529                 sleep(1);
 530
 531                 start_pts = last_pts + TIMEBASE;
 532         }
 533 }