/* Seek to a file and a position */ void FioSeekToFile(uint8 slot, size_t pos) { FILE *f; #if defined(LIMITED_FDS) /* Make sure we have this file open */ FioRestoreFile(slot); #endif /* LIMITED_FDS */ f = _fio.handles[slot]; assert(f != NULL); _fio.cur_fh = f; _fio.filename = _fio.filenames[slot]; FioSeekTo(pos, SEEK_SET); }
void FioReadBlock(void *ptr, size_t size) { FioSeekTo(FioGetPos(), SEEK_SET); _fio.pos += fread(ptr, 1, size, _fio.cur_fh); }
static void OpenBankFile(const char *filename) { memset(_original_sounds, 0, sizeof(_original_sounds)); /* If there is no sound file (nosound set), don't load anything */ if (filename == NULL) return; FioOpenFile(SOUND_SLOT, filename); size_t pos = FioGetPos(); uint count = FioReadDword(); /* The new format has the highest bit always set */ bool new_format = HasBit(count, 31); ClrBit(count, 31); count /= 8; /* Simple check for the correct number of original sounds. */ if (count != ORIGINAL_SAMPLE_COUNT) { /* Corrupt sample data? Just leave the allocated memory as those tell * there is no sound to play (size = 0 due to calloc). Not allocating * the memory disables valid NewGRFs that replace sounds. */ DEBUG(misc, 6, "Incorrect number of sounds in '%s', ignoring.", filename); return; } FioSeekTo(pos, SEEK_SET); for (uint i = 0; i != ORIGINAL_SAMPLE_COUNT; i++) { _original_sounds[i].file_slot = SOUND_SLOT; _original_sounds[i].file_offset = GB(FioReadDword(), 0, 31) + pos; _original_sounds[i].file_size = FioReadDword(); } for (uint i = 0; i != ORIGINAL_SAMPLE_COUNT; i++) { SoundEntry *sound = &_original_sounds[i]; char name[255]; FioSeekTo(sound->file_offset, SEEK_SET); /* Check for special case, see else case */ FioReadBlock(name, FioReadByte()); // Read the name of the sound if (new_format || strcmp(name, "Corrupt sound") != 0) { FioSeekTo(12, SEEK_CUR); // Skip past RIFF header /* Read riff tags */ for (;;) { uint32 tag = FioReadDword(); uint32 size = FioReadDword(); if (tag == ' tmf') { FioReadWord(); // wFormatTag sound->channels = FioReadWord(); // wChannels sound->rate = FioReadDword(); // samples per second if (!new_format) sound->rate = 11025; // seems like all old samples should be played at this rate. FioReadDword(); // avg bytes per second FioReadWord(); // alignment sound->bits_per_sample = FioReadByte(); // bits per sample FioSeekTo(size - (2 + 2 + 4 + 4 + 2 + 1), SEEK_CUR); } else if (tag == 'atad') { sound->file_size = size; sound->file_slot = SOUND_SLOT; sound->file_offset = FioGetPos(); break; } else { sound->file_size = 0; break; } } } else { /* * Special case for the jackhammer sound * (name in sample.cat is "Corrupt sound") * It's no RIFF file, but raw PCM data */ sound->channels = 1; sound->rate = 11025; sound->bits_per_sample = 8; sound->file_slot = SOUND_SLOT; sound->file_offset = FioGetPos(); } } }