git.sesse.net Git - nageru/blob - main.cpp

   1 #include <assert.h>
   2 #include <atomic>
   3 #include <chrono>
   4 #include <condition_variable>
   5 #include <dirent.h>
   6 #include <getopt.h>
   7 #include <memory>
   8 #include <mutex>
   9 #include <stdint.h>
  10 #include <stdio.h>
  11 #include <string>
  12 #include <sys/types.h>
  13 #include <thread>
  14 #include <vector>
  15
  16 extern "C" {
  17 #include <libavformat/avformat.h>
  18 }
  19
  20 #include "clip_list.h"
  21 #include "context.h"
  22 #include "defs.h"
  23 #include "disk_space_estimator.h"
  24 #include "ffmpeg_raii.h"
  25 #include "flags.h"
  26 #include "httpd.h"
  27 #include "mainwindow.h"
  28 #include "player.h"
  29 #include "post_to_main_thread.h"
  30 #include "ref_counted_gl_sync.h"
  31 #include "timebase.h"
  32 #include "ui_mainwindow.h"
  33 #include "vaapi_jpeg_decoder.h"
  34
  35 #include <QApplication>
  36 #include <movit/init.h>
  37 #include <movit/util.h>
  38
  39 using namespace std;
  40 using namespace std::chrono;
  41
  42 mutex RefCountedGLsync::fence_lock;
  43 atomic<bool> should_quit{false};
  44
  45 int64_t start_pts = -1;
  46
  47 // TODO: Replace by some sort of GUI control, I guess.
  48 int64_t current_pts = 0;
  49
  50 string filename_for_frame(unsigned stream_idx, int64_t pts)
  51 {
  52         char filename[256];
  53         snprintf(filename, sizeof(filename), "frames/cam%d-pts%09ld.jpeg", stream_idx, pts);
  54         return filename;
  55 }
  56
  57 mutex frame_mu;
  58 vector<int64_t> frames[MAX_STREAMS];
  59 HTTPD *global_httpd;
  60
  61 void load_existing_frames();
  62 int record_thread_func();
  63
  64 int main(int argc, char **argv)
  65 {
  66         parse_flags(argc, argv);
  67         if (optind == argc) {
  68                 global_flags.stream_source = "multiangle.mp4";
  69                 global_flags.slow_down_input = true;
  70         } else if (optind + 1 == argc) {
  71                 global_flags.stream_source = argv[optind];
  72         } else {
  73                 usage();
  74                 exit(1);
  75         }
  76
  77         avformat_network_init();
  78         global_httpd = new HTTPD;
  79         global_httpd->start(DEFAULT_HTTPD_PORT);
  80
  81         QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
  82
  83         QSurfaceFormat fmt;
  84         fmt.setDepthBufferSize(0);
  85         fmt.setStencilBufferSize(0);
  86         fmt.setProfile(QSurfaceFormat::CoreProfile);
  87         fmt.setMajorVersion(4);
  88         fmt.setMinorVersion(5);
  89
  90         // Turn off vsync, since Qt generally gives us at most frame rate
  91         // (display frequency) / (number of QGLWidgets active).
  92         fmt.setSwapInterval(0);
  93
  94         QSurfaceFormat::setDefaultFormat(fmt);
  95
  96         QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
  97
  98         QApplication app(argc, argv);
  99         global_share_widget = new QGLWidget();
 100         if (!global_share_widget->isValid()) {
 101                 fprintf(stderr, "Failed to initialize OpenGL. Futatabi needs at least OpenGL 4.5 to function properly.\n");
 102                 exit(1);
 103         }
 104
 105         // Initialize Movit.
 106         {
 107                 QSurface *surface = create_surface();
 108                 QOpenGLContext *context = create_context(surface);
 109                 make_current(context, surface);
 110                 CHECK(movit::init_movit(MOVIT_SHADER_DIR, movit::MOVIT_DEBUG_OFF));
 111                 delete_context(context);
 112                 // TODO: Delete the surface, too.
 113         }
 114
 115         MainWindow mainWindow;
 116         mainWindow.show();
 117
 118         init_jpeg_vaapi();
 119
 120         load_existing_frames();
 121         thread record_thread(record_thread_func);
 122
 123         int ret = app.exec();
 124
 125         should_quit = true;
 126         record_thread.join();
 127         JPEGFrameView::shutdown();
 128
 129         return ret;
 130 }
 131
 132 void load_existing_frames()
 133 {
 134         DIR *dir = opendir("frames/");
 135         if (dir == nullptr) {
 136                 perror("frames/");
 137                 start_pts = 0;
 138                 return;
 139         }
 140
 141         for ( ;; ) {
 142                 errno = 0;
 143                 dirent *de = readdir(dir);
 144                 if (de == nullptr) {
 145                         if (errno != 0) {
 146                                 perror("readdir");
 147                                 exit(1);
 148                         }
 149                         break;
 150                 }
 151
 152                 int stream_idx;
 153                 int64_t pts;
 154                 if (sscanf(de->d_name, "cam%d-pts%ld.jpeg", &stream_idx, &pts) == 2 &&
 155                     stream_idx >= 0 && stream_idx < MAX_STREAMS) {
 156                         frames[stream_idx].push_back(pts);
 157                         start_pts = max(start_pts, pts);
 158                 }
 159         }
 160
 161         closedir(dir);
 162
 163         if (start_pts == -1) {
 164                 start_pts = 0;
 165         } else {
 166                 // Add a gap of one second from the old frames to the new ones.
 167                 start_pts += TIMEBASE;
 168         }
 169
 170         for (int stream_idx = 0; stream_idx < MAX_STREAMS; ++stream_idx) {
 171                 sort(frames[stream_idx].begin(), frames[stream_idx].end());
 172         }
 173 }
 174
 175 int record_thread_func()
 176 {
 177         auto format_ctx = avformat_open_input_unique(global_flags.stream_source.c_str(), nullptr, nullptr);
 178         if (format_ctx == nullptr) {
 179                 fprintf(stderr, "%s: Error opening file\n", global_flags.stream_source.c_str());
 180                 return 1;
 181         }
 182
 183         int64_t last_pts = -1;
 184         int64_t pts_offset;
 185
 186         while (!should_quit.load()) {
 187                 AVPacket pkt;
 188                 unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
 189                         &pkt, av_packet_unref);
 190                 av_init_packet(&pkt);
 191                 pkt.data = nullptr;
 192                 pkt.size = 0;
 193
 194                 // TODO: Make it possible to abort av_read_frame() (use an interrupt callback);
 195                 // right now, should_quit will be ignored if it's hung on I/O.
 196                 if (av_read_frame(format_ctx.get(), &pkt) != 0) {
 197                         break;
 198                 }
 199
 200                 // Convert pts to our own timebase.
 201                 AVRational stream_timebase = format_ctx->streams[pkt.stream_index]->time_base;
 202                 int64_t pts = av_rescale_q(pkt.pts, stream_timebase, AVRational{ 1, TIMEBASE });
 203
 204                 // Translate offset into our stream.
 205                 if (last_pts == -1) {
 206                         pts_offset = start_pts - pts;
 207                 }
 208                 pts = std::max(pts + pts_offset, start_pts);
 209
 210                 //fprintf(stderr, "Got a frame from camera %d, pts = %ld, size = %d\n",
 211                 //      pkt.stream_index, pts, pkt.size);
 212                 string filename = filename_for_frame(pkt.stream_index, pts);
 213                 FILE *fp = fopen(filename.c_str(), "wb");
 214                 if (fp == nullptr) {
 215                         perror(filename.c_str());
 216                         exit(1);
 217                 }
 218                 fwrite(pkt.data, pkt.size, 1, fp);
 219                 fclose(fp);
 220
 221                 global_disk_space_estimator->report_write(filename, pts);
 222
 223                 post_to_main_thread([pkt, pts] {
 224                         if (pkt.stream_index == 0) {
 225                                 global_mainwindow->ui->input1_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 226                         } else if (pkt.stream_index == 1) {
 227                                 global_mainwindow->ui->input2_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 228                         } else if (pkt.stream_index == 2) {
 229                                 global_mainwindow->ui->input3_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 230                         } else if (pkt.stream_index == 3) {
 231                                 global_mainwindow->ui->input4_display->setFrame(pkt.stream_index, pts, /*interpolated=*/false);
 232                         }
 233                 });
 234
 235                 assert(pkt.stream_index < MAX_STREAMS);
 236                 frames[pkt.stream_index].push_back(pts);
 237
 238                 if (last_pts != -1 && global_flags.slow_down_input) {
 239                         this_thread::sleep_for(microseconds((pts - last_pts) * 1000000 / TIMEBASE));
 240                 }
 241                 last_pts = pts;
 242                 current_pts = pts;
 243         }
 244
 245         return 0;
 246 }