Function ReadAmbientData

Descent3/ambient.cpp:210–284

Reads data from the ambient sound data file

// Reads data from the ambient sound data file
void ReadAmbientData() {
  CFILE *ifile;
  char file_id[sizeof(AMBIENT_FILE_ID)];
  int version;

  // Get rid of any old data
  FreeAmbientSoundData();

  // Build filename
  ifile = cfopen(AMBIENT_FILE_NAME, "rb");

  if (!ifile) {
    Int3();
    return;
  }

  // Read file ID
  cf_ReadBytes((uint8_t *)file_id, strlen(AMBIENT_FILE_ID), ifile);
  if (strncmp(file_id, AMBIENT_FILE_ID, strlen(AMBIENT_FILE_ID)) != 0) {
    Int3();
    cfclose(ifile);
    return;
  }

  // Read version
  version = cf_ReadInt(ifile);

  if (version > AMBIENT_FILE_VERSION) {
    Int3();
    cfclose(ifile);
    return;
  }

  // Get the number of patterns
  Num_ambient_sound_patterns = cf_ReadInt(ifile);

  // Read the patterns
  for (int p = 0; p < Num_ambient_sound_patterns; p++) {

    asp *asp = &Ambient_sound_patterns[p];

    cf_ReadString(asp->name, sizeof(asp->name), ifile);

    asp->min_delay = cf_ReadFloat(ifile);
    asp->max_delay = cf_ReadFloat(ifile);

    asp->num_sounds = cf_ReadInt(ifile);

    if (asp->num_sounds > 0)
      asp->sounds = (ase *)mem_malloc(sizeof(*asp->sounds) * asp->num_sounds);
    else
      asp->sounds = NULL;

    int prob = 0;
    for (int s = 0; s < asp->num_sounds; s++) {
      char tbuf[PAGENAME_LEN];

      cf_ReadString(tbuf, sizeof(tbuf), ifile);