5 #include <condition_variable>
14 #include <sys/types.h>
20 #include <libavformat/avformat.h>
23 #include "clip_list.h"
24 #include "shared/context.h"
26 #include "shared/disk_space_estimator.h"
27 #include "shared/ffmpeg_raii.h"
29 #include "frame_on_disk.h"
31 #include "shared/httpd.h"
32 #include "mainwindow.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"
41 #include <QApplication>
43 #include <QSurfaceFormat>
44 #include <QProgressDialog>
45 #include <movit/init.h>
46 #include <movit/util.h>
49 using namespace std::chrono;
51 constexpr char frame_magic[] = "Ftbifrm0";
52 constexpr size_t frame_magic_len = 8;
54 mutex RefCountedGLsync::fence_lock;
55 atomic<bool> should_quit{false};
57 int64_t start_pts = -1;
59 // TODO: Replace by some sort of GUI control, I guess.
60 int64_t current_pts = 0;
64 unsigned filename_idx;
65 size_t frames_written_so_far = 0;
67 std::map<int, FrameFile> open_frame_files;
70 vector<FrameOnDisk> frames[MAX_STREAMS]; // Under frame_mu.
71 vector<string> frame_filenames; // Under frame_mu.
73 atomic<int64_t> metric_received_frames[MAX_STREAMS]{{0}};
77 FrameOnDisk write_frame(int stream_idx, int64_t pts, const uint8_t *data, size_t size, DB *db)
79 if (open_frame_files.count(stream_idx) == 0) {
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");
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 };
95 FrameFile &file = open_frame_files[stream_idx];
96 unsigned filename_idx = file.filename_idx;
99 lock_guard<mutex> lock(frame_mu);
100 filename = frame_filenames[filename_idx];
103 FrameHeaderProto hdr;
104 hdr.set_stream_idx(stream_idx);
106 hdr.set_file_size(size);
109 if (!hdr.SerializeToString(&serialized)) {
110 fprintf(stderr, "Frame header serialization failed.\n");
113 uint32_t len = htonl(serialized.size());
115 if (fwrite(frame_magic, frame_magic_len, 1, file.fp) != 1) {
119 if (fwrite(&len, sizeof(len), 1, file.fp) != 1) {
123 if (fwrite(serialized.data(), serialized.size(), 1, file.fp) != 1) {
127 off_t offset = ftell(file.fp);
128 if (fwrite(data, size, 1, file.fp) != 1) {
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);
137 frame.filename_idx = filename_idx;
138 frame.offset = offset;
142 lock_guard<mutex> lock(frame_mu);
143 assert(stream_idx < MAX_STREAMS);
144 frames[stream_idx].push_back(frame);
147 if (++file.frames_written_so_far >= 1000) {
148 size_t size = ftell(file.fp);
150 // Start a new file next time.
151 if (fclose(file.fp) != 0) {
155 open_frame_files.erase(stream_idx);
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;
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) });
174 const char *basename = filename.c_str();
175 while (strchr(basename, '/') != nullptr) {
176 basename = strchr(basename, '/') + 1;
178 db->store_frame_file(basename, size, frames_this_file);
188 void load_existing_frames();
189 void record_thread_func();
191 int main(int argc, char **argv)
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];
204 string frame_dir = global_flags.working_directory + "/frames";
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());
213 avformat_network_init();
214 global_httpd = new HTTPD;
216 QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
219 fmt.setDepthBufferSize(0);
220 fmt.setStencilBufferSize(0);
221 fmt.setProfile(QSurfaceFormat::CoreProfile);
222 fmt.setMajorVersion(4);
223 fmt.setMinorVersion(5);
225 // Turn off vsync, since Qt generally gives us at most frame rate
226 // (display frequency) / (number of QGLWidgets active).
227 fmt.setSwapInterval(0);
229 QSurfaceFormat::setDefaultFormat(fmt);
231 QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
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");
242 QSurface *surface = create_surface();
243 QOpenGLContext *context = create_context(surface);
244 if (!make_current(context, surface)) {
248 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
249 delete_context(context);
250 // TODO: Delete the surface, too.
253 load_existing_frames();
255 MainWindow main_window;
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);
263 thread record_thread(record_thread_func);
265 int ret = app.exec();
268 record_thread.join();
269 JPEGFrameView::shutdown();
274 void load_frame_file(const char *filename, const string &basename, unsigned filename_idx, DB *db)
277 if (stat(filename, &st) == -1) {
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);
294 FILE *fp = fopen(filename, "rb");
300 size_t magic_offset = 0;
301 size_t skipped_bytes = 0;
302 while (!feof(fp) && !ferror(fp)) {
307 if (ch != frame_magic[magic_offset++]) {
308 skipped_bytes += magic_offset;
312 if (magic_offset < frame_magic_len) {
313 // Still reading the magic (hopefully).
317 // OK, found the magic. Try to parse the frame header.
320 if (skipped_bytes > 0) {
321 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes in the middle.\n",
322 filename, skipped_bytes);
327 if (fread(&len, sizeof(len), 1, fp) != 1) {
328 fprintf(stderr, "WARNING: %s: Short read when getting length.\n", filename);
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());
339 FrameHeaderProto hdr;
340 if (!hdr.ParseFromString(serialized)) {
341 fprintf(stderr, "WARNING: %s: Corrupted frame header.\n", filename);
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));
352 frame.filename_idx = filename_idx;
353 frame.size = hdr.file_size();
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);
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());
364 all_frames.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(hdr.stream_idx()) });
367 if (skipped_bytes > 0) {
368 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes at the end.\n",
369 filename, skipped_bytes);
372 off_t size = ftell(fp);
376 fprintf(stderr, "WARNING: %s: ftell() failed (%s).\n", filename, strerror(errno));
380 db->store_frame_file(basename, size, all_frames);
383 void load_existing_frames()
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);
392 string frame_dir = global_flags.working_directory + "/frames";
393 DIR *dir = opendir(frame_dir.c_str());
394 if (dir == nullptr) {
400 vector<string> frame_basenames;
403 dirent *de = readdir(dir);
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);
418 if (progress.wasCanceled()) {
424 progress.setMaximum(frame_filenames.size() + 2);
425 progress.setValue(1);
427 progress.setLabelText("Opening database...");
428 DB db(global_flags.working_directory + "/futatabi.db");
430 progress.setLabelText("Reading frame files...");
431 progress.setValue(2);
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()) {
441 if (start_pts == -1) {
444 // Add a gap of one second from the old frames to the new ones.
445 start_pts += TIMEBASE;
447 current_pts = start_pts;
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; });
454 db.clean_unused_frame_files(frame_basenames);
457 void record_thread_func()
459 for (unsigned i = 0; i < MAX_STREAMS; ++i) {
460 global_metrics.add("received_frames", {{ "stream", to_string(i) }}, &metric_received_frames[i]);
463 if (global_flags.stream_source.empty() || global_flags.stream_source == "/dev/null") {
464 // Save the user from some repetitive messages.
468 pthread_setname_np(pthread_self(), "ReceiveFrames");
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");
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());
481 int64_t last_pts = -1;
483 while (!should_quit.load()) {
485 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
486 &pkt, av_packet_unref);
487 av_init_packet(&pkt);
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) {
496 if (pkt.stream_index >= MAX_STREAMS) {
500 ++metric_received_frames[pkt.stream_index];
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 });
506 // Translate offset into our stream.
507 if (last_pts == -1) {
508 pts_offset = start_pts - pts;
510 pts = std::max(pts + pts_offset, start_pts);
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);
516 post_to_main_thread([pkt, frame] {
517 global_mainwindow->display_frame(pkt.stream_index, frame);
520 if (last_pts != -1 && global_flags.slow_down_input) {
521 this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));
527 fprintf(stderr, "%s: Hit EOF. Waiting one second and trying again...\n", global_flags.stream_source.c_str());
530 start_pts = last_pts + TIMEBASE;