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

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