Function DemoPlaybackFile

Descent3/demofile.cpp:700–735

int DemoFrameCount = 0;

int DemoPlaybackFile(char *filename) {
  is_multi_demo = false;
  mprintf(0, "Playing back demo file!\n");
  MultiBuildMatchTables();
  if (FindArg("-makemovie")) {
    Demo_make_movie = true;
  }

  if (FindArg("-fastdemo")) {
    Demo_play_fast = true;
  }
  Demo_first_frame = true;
  for (int i = 0; i < MAX_OBJECTS; i++) {
    Demo_obj_map[i] = i;
  }

  if (Demo_flags == DF_RECORDING) {
    DemoToggleRecording();
  }
  Demo_cfp = cfopen(filename, "rb");

  if (Demo_cfp == NULL) {
    DoMessageBox(TXT_ERROR, TXT_CANTLOAD, MSGBOX_OK, UICOL_WINDOW_TITLE, UICOL_TEXT_NORMAL);
    return 0;
  }

  Demo_flags = DF_PLAYBACK;
  FrameDemoDelta = FrameCount;
  if (!DemoReadHeader()) {
    Demo_flags = DF_NONE;
    DoMessageBox(TXT_ERROR, TXT_BADDEMOFILE, MSGBOX_OK, UICOL_WINDOW_TITLE, UICOL_TEXT_NORMAL);
    return 0;
  }

  return 1;
}

extern bool IsRestoredGame;
int DemoReadHeader() {