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 <movit/init.h>
43 #include <movit/util.h>
46 using namespace std::chrono;
48 constexpr char frame_magic[] = "Ftbifrm0";
49 constexpr size_t frame_magic_len = 8;
51 mutex RefCountedGLsync::fence_lock;
52 atomic<bool> should_quit{false};
54 int64_t start_pts = -1;
56 // TODO: Replace by some sort of GUI control, I guess.
57 int64_t current_pts = 0;
61 unsigned filename_idx;
62 size_t frames_written_so_far = 0;
64 std::map<int, FrameFile> open_frame_files;
67 vector<FrameOnDisk> frames[MAX_STREAMS]; // Under frame_mu.
68 vector<string> frame_filenames; // Under frame_mu.
72 FrameOnDisk write_frame(int stream_idx, int64_t pts, const uint8_t *data, size_t size, DB *db)
74 if (open_frame_files.count(stream_idx) == 0) {
76 snprintf(filename, sizeof(filename), "%s/frames/cam%d-pts%09ld.frames",
77 global_flags.working_directory.c_str(), stream_idx, pts);
78 FILE *fp = fopen(filename, "wb");
84 lock_guard<mutex> lock(frame_mu);
85 unsigned filename_idx = frame_filenames.size();
86 frame_filenames.push_back(filename);
87 open_frame_files[stream_idx] = FrameFile{ fp, filename_idx, 0 };
90 FrameFile &file = open_frame_files[stream_idx];
91 unsigned filename_idx = file.filename_idx;
94 lock_guard<mutex> lock(frame_mu);
95 filename = frame_filenames[filename_idx];
99 hdr.set_stream_idx(stream_idx);
101 hdr.set_file_size(size);
104 if (!hdr.SerializeToString(&serialized)) {
105 fprintf(stderr, "Frame header serialization failed.\n");
108 uint32_t len = htonl(serialized.size());
110 if (fwrite(frame_magic, frame_magic_len, 1, file.fp) != 1) {
114 if (fwrite(&len, sizeof(len), 1, file.fp) != 1) {
118 if (fwrite(serialized.data(), serialized.size(), 1, file.fp) != 1) {
122 off_t offset = ftell(file.fp);
123 if (fwrite(data, size, 1, file.fp) != 1) {
127 fflush(file.fp); // No fsync(), though. We can accept losing a few frames.
128 global_disk_space_estimator->report_write(filename, 8 + sizeof(len) + serialized.size() + size, pts);
132 frame.filename_idx = filename_idx;
133 frame.offset = offset;
137 lock_guard<mutex> lock(frame_mu);
138 assert(stream_idx < MAX_STREAMS);
139 frames[stream_idx].push_back(frame);
142 if (++file.frames_written_so_far >= 1000) {
143 size_t size = ftell(file.fp);
145 // Start a new file next time.
146 if (fclose(file.fp) != 0) {
150 open_frame_files.erase(stream_idx);
152 // Write information about all frames in the finished file to SQLite.
153 // (If we crash before getting to do this, we'll be scanning through
154 // the file on next startup, and adding it to the database then.)
155 // NOTE: Since we don't fsync(), we could in theory get broken data
156 // but with the right size, but it would seem unlikely.
157 vector<DB::FrameOnDiskAndStreamIdx> frames_this_file;
159 lock_guard<mutex> lock(frame_mu);
160 for (size_t stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
161 for (const FrameOnDisk &frame : frames[stream_idx]) {
162 if (frame.filename_idx == filename_idx) {
163 frames_this_file.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(stream_idx) });
168 db->store_frame_file(filename, size, frames_this_file);
178 void load_existing_frames();
179 int record_thread_func();
181 int main(int argc, char **argv)
183 parse_flags(argc, argv);
184 if (optind == argc) {
185 global_flags.stream_source = "multiangle.mp4";
186 global_flags.slow_down_input = true;
187 } else if (optind + 1 == argc) {
188 global_flags.stream_source = argv[optind];
194 string frame_dir = global_flags.working_directory + "/frames";
197 if (stat(frame_dir.c_str(), &st) == -1) {
198 fprintf(stderr, "%s does not exist, creating it.\n", frame_dir.c_str());
199 if (mkdir(frame_dir.c_str(), 0777) == -1) {
200 perror(global_flags.working_directory.c_str());
205 avformat_network_init();
206 global_httpd = new HTTPD;
208 QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
211 fmt.setDepthBufferSize(0);
212 fmt.setStencilBufferSize(0);
213 fmt.setProfile(QSurfaceFormat::CoreProfile);
214 fmt.setMajorVersion(4);
215 fmt.setMinorVersion(5);
217 // Turn off vsync, since Qt generally gives us at most frame rate
218 // (display frequency) / (number of QGLWidgets active).
219 fmt.setSwapInterval(0);
221 QSurfaceFormat::setDefaultFormat(fmt);
223 QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
225 QApplication app(argc, argv);
226 global_share_widget = new QGLWidget();
227 if (!global_share_widget->isValid()) {
228 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
234 QSurface *surface = create_surface();
235 QOpenGLContext *context = create_context(surface);
236 make_current(context, surface);
237 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
238 delete_context(context);
239 // TODO: Delete the surface, too.
242 MainWindow main_window;
245 global_httpd->add_endpoint("/queue_status", bind(&MainWindow::get_queue_status, &main_window), HTTPD::NO_CORS_POLICY);
246 global_httpd->start(global_flags.http_port);
250 load_existing_frames();
251 thread record_thread(record_thread_func);
253 int ret = app.exec();
256 record_thread.join();
257 JPEGFrameView::shutdown();
262 void load_frame_file(const char *filename, unsigned filename_idx, DB *db)
265 if (stat(filename, &st) == -1) {
270 vector<DB::FrameOnDiskAndStreamIdx> all_frames = db->load_frame_file(filename, st.st_size, filename_idx);
271 if (!all_frames.empty()) {
272 // We already had this cached in the database, so no need to look in the file.
273 for (const DB::FrameOnDiskAndStreamIdx &frame : all_frames) {
274 if (frame.stream_idx >= 0 && frame.stream_idx < MAX_STREAMS) {
275 frames[frame.stream_idx].push_back(frame.frame);
276 start_pts = max(start_pts, frame.frame.pts);
282 FILE *fp = fopen(filename, "rb");
288 size_t magic_offset = 0;
289 size_t skipped_bytes = 0;
290 while (!feof(fp) && !ferror(fp)) {
295 if (ch != frame_magic[magic_offset++]) {
296 skipped_bytes += magic_offset;
300 if (magic_offset < frame_magic_len) {
301 // Still reading the magic (hopefully).
305 // OK, found the magic. Try to parse the frame header.
308 if (skipped_bytes > 0) {
309 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes in the middle.\n",
310 filename, skipped_bytes);
315 if (fread(&len, sizeof(len), 1, fp) != 1) {
316 fprintf(stderr, "WARNING: %s: Short read when getting length.\n", filename);
321 serialized.resize(ntohl(len));
322 if (fread(&serialized[0], serialized.size(), 1, fp) != 1) {
323 fprintf(stderr, "WARNING: %s: Short read when reading frame header (%zu bytes).\n", filename, serialized.size());
327 FrameHeaderProto hdr;
328 if (!hdr.ParseFromString(serialized)) {
329 fprintf(stderr, "WARNING: %s: Corrupted frame header.\n", filename);
334 frame.pts = hdr.pts();
335 frame.offset = ftell(fp);
336 frame.filename_idx = filename_idx;
337 frame.size = hdr.file_size();
339 if (fseek(fp, frame.offset + frame.size, SEEK_SET) == -1) {
340 fprintf(stderr, "WARNING: %s: Could not seek past frame (probably truncated).\n", filename);
344 if (hdr.stream_idx() >= 0 && hdr.stream_idx() < MAX_STREAMS) {
345 frames[hdr.stream_idx()].push_back(frame);
346 start_pts = max(start_pts, hdr.pts());
348 all_frames.emplace_back(DB::FrameOnDiskAndStreamIdx{ frame, unsigned(hdr.stream_idx()) });
351 if (skipped_bytes > 0) {
352 fprintf(stderr, "WARNING: %s: Skipped %zu garbage bytes at the end.\n",
353 filename, skipped_bytes);
356 size_t size = ftell(fp);
359 db->store_frame_file(filename, size, all_frames);
362 void load_existing_frames()
364 DB db(global_flags.working_directory + "/futatabi.db");
366 string frame_dir = global_flags.working_directory + "/frames";
367 DIR *dir = opendir(frame_dir.c_str());
368 if (dir == nullptr) {
376 dirent *de = readdir(dir);
385 if (de->d_type == DT_REG) {
386 string filename = frame_dir + "/" + de->d_name;
387 load_frame_file(filename.c_str(), frame_filenames.size(), &db);
388 frame_filenames.push_back(filename);
394 if (start_pts == -1) {
397 // Add a gap of one second from the old frames to the new ones.
398 start_pts += TIMEBASE;
401 for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
402 sort(frames[stream_idx].begin(), frames[stream_idx].end(),
403 [](const auto &a, const auto &b) { return a.pts < b.pts; });
407 int record_thread_func()
409 auto format_ctx = avformat_open_input_unique(global_flags.stream_source.c_str(), nullptr, nullptr);
410 if (format_ctx == nullptr) {
411 fprintf(stderr, "%s: Error opening file\n", global_flags.stream_source.c_str());
415 int64_t last_pts = -1;
417 DB db(global_flags.working_directory + "/futatabi.db");
419 while (!should_quit.load()) {
421 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
422 &pkt, av_packet_unref);
423 av_init_packet(&pkt);
427 // TODO: Make it possible to abort av_read_frame() (use an interrupt callback);
428 // right now, should_quit will be ignored if it's hung on I/O.
429 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
433 // Convert pts to our own timebase.
434 AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
435 int64_t pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
437 // Translate offset into our stream.
438 if (last_pts == -1) {
439 pts_offset = start_pts - pts;
441 pts = std::max(pts + pts_offset, start_pts);
443 //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
444 // pkt.stream_index, pts, pkt.size);
445 FrameOnDisk frame = write_frame(pkt.stream_index, pts, pkt.data, pkt.size, &db);
447 post_to_main_thread([pkt, frame] {
448 if (pkt.stream_index == 0) {
449 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, frame);
450 } else if (pkt.stream_index == 1) {
451 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, frame);
452 } else if (pkt.stream_index == 2) {
453 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, frame);
454 } else if (pkt.stream_index == 3) {
455 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, frame);
459 if (last_pts != -1 && global_flags.slow_down_input) {
460 this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));