5 #include <condition_variable>
14 #include <sys/types.h>
19 #include <libavformat/avformat.h>
22 #include "clip_list.h"
25 #include "disk_space_estimator.h"
26 #include "ffmpeg_raii.h"
28 #include "frame_on_disk.h"
31 #include "mainwindow.h"
33 #include "post_to_main_thread.h"
34 #include "ref_counted_gl_sync.h"
36 #include "ui_mainwindow.h"
37 #include "vaapi_jpeg_decoder.h"
39 #include <QApplication>
41 #include <QSurfaceFormat>
42 #include <QProgressDialog>
43 #include <movit/init.h>
44 #include <movit/util.h>
47 using namespace std::chrono;
49 constexpr char frame_magic[] = "Ftbifrm0";
50 constexpr size_t frame_magic_len = 8;
52 mutex RefCountedGLsync::fence_lock;
53 atomic<bool> should_quit{false};
55 int64_t start_pts = -1;
57 // TODO: Replace by some sort of GUI control, I guess.
58 int64_t current_pts = 0;
62 unsigned filename_idx;
63 size_t frames_written_so_far = 0;
65 std::map<int, FrameFile> open_frame_files;
68 vector<FrameOnDisk> frames[MAX_STREAMS]; // Under frame_mu.
69 vector<string> frame_filenames; // Under frame_mu.
73 FrameOnDisk write_frame(int stream_idx, int64_t pts, const uint8_t *data, size_t size, DB *db)
75 if (open_frame_files.count(stream_idx) == 0) {
77 snprintf(filename, sizeof(filename), "%s/frames/cam%d-pts%09ld.frames",
78 global_flags.working_directory.c_str(), stream_idx, pts);
79 FILE *fp = fopen(filename, "wb");
85 lock_guard<mutex> lock(frame_mu);
86 unsigned filename_idx = frame_filenames.size();
87 frame_filenames.push_back(filename);
88 open_frame_files[stream_idx] = FrameFile{ fp, filename_idx, 0 };
91 FrameFile &file = open_frame_files[stream_idx];
92 unsigned filename_idx = file.filename_idx;
95 lock_guard<mutex> lock(frame_mu);
96 filename = frame_filenames[filename_idx];
100 hdr.set_stream_idx(stream_idx);
102 hdr.set_file_size(size);
105 if (!hdr.SerializeToString(&serialized)) {
106 fprintf(stderr, "Frame header serialization failed.\n");
109 uint32_t len = htonl(serialized.size());
111 if (fwrite(frame_magic, frame_magic_len, 1, file.fp) != 1) {
115 if (fwrite(&len, sizeof(len), 1, file.fp) != 1) {
119 if (fwrite(serialized.data(), serialized.size(), 1, file.fp) != 1) {
123 off_t offset = ftell(file.fp);
124 if (fwrite(data, size, 1, file.fp) != 1) {
128 fflush(file.fp); // No fsync(), though. We can accept losing a few frames.
129 global_disk_space_estimator->report_write(filename, 8 + sizeof(len) + serialized.size() + size, pts);
133 frame.filename_idx = filename_idx;
134 frame.offset = offset;
138 lock_guard<mutex> lock(frame_mu);
139 assert(stream_idx < MAX_STREAMS);
140 frames[stream_idx].push_back(frame);
143 if (++file.frames_written_so_far >= 1000) {
144 size_t size = ftell(file.fp);
146 // Start a new file next time.
147 if (fclose(file.fp) != 0) {
151 open_frame_files.erase(stream_idx);
153 // Write information about all frames in the finished file to SQLite.
154 // (If we crash before getting to do this, we'll be scanning through
155 // the file on next startup, and adding it to the database then.)
156 // NOTE: Since we don't fsync(), we could in theory get broken data
157 // but with the right size, but it would seem unlikely.
158 vector<DB::FrameOnDiskAndStreamIdx> frames_this_file;
160 lock_guard<mutex> lock(frame_mu);
161 for (size_t stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
162 for (const FrameOnDisk &frame : frames[stream_idx]) {
163 if (frame.filename_idx == filename_idx) {
164 frames_this_file.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(stream_idx) });
169 db->store_frame_file(filename, size, frames_this_file);
179 void load_existing_frames();
180 int record_thread_func();
182 int main(int argc, char **argv)
184 parse_flags(argc, argv);
185 if (optind == argc) {
186 global_flags.stream_source = "multiangle.mp4";
187 global_flags.slow_down_input = true;
188 } else if (optind + 1 == argc) {
189 global_flags.stream_source = argv[optind];
195 string frame_dir = global_flags.working_directory + "/frames";
198 if (stat(frame_dir.c_str(), &st) == -1) {
199 fprintf(stderr, "%s does not exist, creating it.\n", frame_dir.c_str());
200 if (mkdir(frame_dir.c_str(), 0777) == -1) {
201 perror(global_flags.working_directory.c_str());
206 avformat_network_init();
207 global_httpd = new HTTPD;
209 QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
212 fmt.setDepthBufferSize(0);
213 fmt.setStencilBufferSize(0);
214 fmt.setProfile(QSurfaceFormat::CoreProfile);
215 fmt.setMajorVersion(4);
216 fmt.setMinorVersion(5);
218 // Turn off vsync, since Qt generally gives us at most frame rate
219 // (display frequency) / (number of QGLWidgets active).
220 fmt.setSwapInterval(0);
222 QSurfaceFormat::setDefaultFormat(fmt);
224 QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
226 QApplication app(argc, argv);
227 global_share_widget = new QGLWidget();
228 if (!global_share_widget->isValid()) {
229 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
235 QSurface *surface = create_surface();
236 QOpenGLContext *context = create_context(surface);
237 make_current(context, surface);
238 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
239 delete_context(context);
240 // TODO: Delete the surface, too.
243 load_existing_frames();
245 MainWindow main_window;
248 global_httpd->add_endpoint("/queue_status", bind(&MainWindow::get_queue_status, &main_window), HTTPD::NO_CORS_POLICY);
249 global_httpd->start(global_flags.http_port);
253 thread record_thread(record_thread_func);
255 int ret = app.exec();
258 record_thread.join();
259 JPEGFrameView::shutdown();
264 void load_frame_file(const char *filename, unsigned filename_idx, DB *db)
267 if (stat(filename, &st) == -1) {
272 vector<DB::FrameOnDiskAndStreamIdx> all_frames = db->load_frame_file(filename, st.st_size, filename_idx);
273 if (!all_frames.empty()) {
274 // We already had this cached in the database, so no need to look in the file.
275 for (const DB::FrameOnDiskAndStreamIdx &frame : all_frames) {
276 if (frame.stream_idx >= 0 && frame.stream_idx < MAX_STREAMS) {
277 frames[frame.stream_idx].push_back(frame.frame);
278 start_pts = max(start_pts, frame.frame.pts);
284 FILE *fp = fopen(filename, "rb");
290 size_t magic_offset = 0;
291 size_t skipped_bytes = 0;
292 while (!feof(fp) && !ferror(fp)) {
297 if (ch != frame_magic[magic_offset++]) {
298 skipped_bytes += magic_offset;
302 if (magic_offset < frame_magic_len) {
303 // Still reading the magic (hopefully).
307 // OK, found the magic. Try to parse the frame header.
310 if (skipped_bytes > 0) {
311 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes in the middle.\n",
312 filename, skipped_bytes);
317 if (fread(&len, sizeof(len), 1, fp) != 1) {
318 fprintf(stderr, "WARNING: %s: Short read when getting length.\n", filename);
323 serialized.resize(ntohl(len));
324 if (fread(&serialized[0], serialized.size(), 1, fp) != 1) {
325 fprintf(stderr, "WARNING: %s: Short read when reading frame header (%zu bytes).\n", filename, serialized.size());
329 FrameHeaderProto hdr;
330 if (!hdr.ParseFromString(serialized)) {
331 fprintf(stderr, "WARNING: %s: Corrupted frame header.\n", filename);
336 frame.pts = hdr.pts();
337 frame.offset = ftell(fp);
338 frame.filename_idx = filename_idx;
339 frame.size = hdr.file_size();
341 if (fseek(fp, frame.offset + frame.size, SEEK_SET) == -1) {
342 fprintf(stderr, "WARNING: %s: Could not seek past frame (probably truncated).\n", filename);
346 if (hdr.stream_idx() >= 0 && hdr.stream_idx() < MAX_STREAMS) {
347 frames[hdr.stream_idx()].push_back(frame);
348 start_pts = max(start_pts, hdr.pts());
350 all_frames.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(hdr.stream_idx()) });
353 if (skipped_bytes > 0) {
354 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes at the end.\n",
355 filename, skipped_bytes);
358 size_t size = ftell(fp);
361 db->store_frame_file(filename, size, all_frames);
364 void load_existing_frames()
366 QProgressDialog progress("Scanning frame directory...", "Abort", 0, 1);
367 progress.setWindowTitle("Futatabi");
368 progress.setWindowModality(Qt::WindowModal);
369 progress.setMinimumDuration(1000);
370 progress.setMaximum(1);
371 progress.setValue(0);
373 string frame_dir = global_flags.working_directory + "/frames";
374 DIR *dir = opendir(frame_dir.c_str());
375 if (dir == nullptr) {
383 dirent *de = readdir(dir);
392 if (de->d_type == DT_REG) {
393 string filename = frame_dir + "/" + de->d_name;
394 frame_filenames.push_back(filename);
397 if (progress.wasCanceled()) {
403 progress.setMaximum(frame_filenames.size() + 2);
404 progress.setValue(1);
406 progress.setLabelText("Opening database...");
407 DB db(global_flags.working_directory + "/futatabi.db");
409 progress.setLabelText("Reading frame files...");
410 progress.setValue(2);
412 for (size_t i = 0; i < frame_filenames.size(); ++i) {
413 load_frame_file(frame_filenames[i].c_str(), i, &db);
414 progress.setValue(i + 3);
415 if (progress.wasCanceled()) {
420 if (start_pts == -1) {
423 // Add a gap of one second from the old frames to the new ones.
424 start_pts += TIMEBASE;
427 for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
428 sort(frames[stream_idx].begin(), frames[stream_idx].end(),
429 [](const auto &a, const auto &b) { return a.pts < b.pts; });
433 int record_thread_func()
435 auto format_ctx = avformat_open_input_unique(global_flags.stream_source.c_str(), nullptr, nullptr);
436 if (format_ctx == nullptr) {
437 fprintf(stderr, "%s: Error opening file\n", global_flags.stream_source.c_str());
441 int64_t last_pts = -1;
443 DB db(global_flags.working_directory + "/futatabi.db");
445 while (!should_quit.load()) {
447 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
448 &pkt, av_packet_unref);
449 av_init_packet(&pkt);
453 // TODO: Make it possible to abort av_read_frame() (use an interrupt callback);
454 // right now, should_quit will be ignored if it's hung on I/O.
455 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
459 // Convert pts to our own timebase.
460 AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
461 int64_t pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
463 // Translate offset into our stream.
464 if (last_pts == -1) {
465 pts_offset = start_pts - pts;
467 pts = std::max(pts + pts_offset, start_pts);
469 //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
470 // pkt.stream_index, pts, pkt.size);
471 FrameOnDisk frame = write_frame(pkt.stream_index, pts, pkt.data, pkt.size, &db);
473 post_to_main_thread([pkt, frame] {
474 if (pkt.stream_index == 0) {
475 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, frame);
476 } else if (pkt.stream_index == 1) {
477 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, frame);
478 } else if (pkt.stream_index == 2) {
479 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, frame);
480 } else if (pkt.stream_index == 3) {
481 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, frame);
485 if (last_pts != -1 && global_flags.slow_down_input) {
486 this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));