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