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