dualsense-ts
Version:
The natural interface for your DualSense and DualSense Access controllers, with Typescript
91 lines • 5.08 kB
JavaScript
;
// Ported from pydualsense/pydualsense/checksum.py
// Computes the Bluetooth output-report checksum for report 0x31.
Object.defineProperty(exports, "__esModule", { value: true });
exports.computeBluetoothReportChecksum = computeBluetoothReportChecksum;
exports.computeFeatureReportChecksum = computeFeatureReportChecksum;
const hashTable = new Uint32Array([
0xd202ef8d, 0xa505df1b, 0x3c0c8ea1, 0x4b0bbe37, 0xd56f2b94, 0xa2681b02,
0x3b614ab8, 0x4c667a2e, 0xdcd967bf, 0xabde5729, 0x32d70693, 0x45d03605,
0xdbb4a3a6, 0xacb39330, 0x35bac28a, 0x42bdf21c, 0xcfb5ffe9, 0xb8b2cf7f,
0x21bb9ec5, 0x56bcae53, 0xc8d83bf0, 0xbfdf0b66, 0x26d65adc, 0x51d16a4a,
0xc16e77db, 0xb669474d, 0x2f6016f7, 0x58672661, 0xc603b3c2, 0xb1048354,
0x280dd2ee, 0x5f0ae278, 0xe96ccf45, 0x9e6bffd3, 0x0762ae69, 0x70659eff,
0xee010b5c, 0x99063bca, 0x000f6a70, 0x77085ae6, 0xe7b74777, 0x90b077e1,
0x09b9265b, 0x7ebe16cd, 0xe0da836e, 0x97ddb3f8, 0x0ed4e242, 0x79d3d2d4,
0xf4dbdf21, 0x83dcefb7, 0x1ad5be0d, 0x6dd28e9b, 0xf3b61b38, 0x84b12bae,
0x1db87a14, 0x6abf4a82, 0xfa005713, 0x8d076785, 0x140e363f, 0x630906a9,
0xfd6d930a, 0x8a6aa39c, 0x1363f226, 0x6464c2b0, 0xa4deae1d, 0xd3d99e8b,
0x4ad0cf31, 0x3dd7ffa7, 0xa3b36a04, 0xd4b45a92, 0x4dbd0b28, 0x3aba3bbe,
0xaa05262f, 0xdd0216b9, 0x440b4703, 0x330c7795, 0xad68e236, 0xda6fd2a0,
0x4366831a, 0x3461b38c, 0xb969be79, 0xce6e8eef, 0x5767df55, 0x2060efc3,
0xbe047a60, 0xc9034af6, 0x500a1b4c, 0x270d2bda, 0xb7b2364b, 0xc0b506dd,
0x59bc5767, 0x2ebb67f1, 0xb0dff252, 0xc7d8c2c4, 0x5ed1937e, 0x29d6a3e8,
0x9fb08ed5, 0xe8b7be43, 0x71beeff9, 0x06b9df6f, 0x98dd4acc, 0xefda7a5a,
0x76d32be0, 0x01d41b76, 0x916b06e7, 0xe66c3671, 0x7f6567cb, 0x0862575d,
0x9606c2fe, 0xe101f268, 0x7808a3d2, 0x0f0f9344, 0x82079eb1, 0xf500ae27,
0x6c09ff9d, 0x1b0ecf0b, 0x856a5aa8, 0xf26d6a3e, 0x6b643b84, 0x1c630b12,
0x8cdc1683, 0xfbdb2615, 0x62d277af, 0x15d54739, 0x8bb1d29a, 0xfcb6e20c,
0x65bfb3b6, 0x12b88320, 0x3fba6cad, 0x48bd5c3b, 0xd1b40d81, 0xa6b33d17,
0x38d7a8b4, 0x4fd09822, 0xd6d9c998, 0xa1def90e, 0x3161e49f, 0x4666d409,
0xdf6f85b3, 0xa868b525, 0x360c2086, 0x410b1010, 0xd80241aa, 0xaf05713c,
0x220d7cc9, 0x550a4c5f, 0xcc031de5, 0xbb042d73, 0x2560b8d0, 0x52678846,
0xcb6ed9fc, 0xbc69e96a, 0x2cd6f4fb, 0x5bd1c46d, 0xc2d895d7, 0xb5dfa541,
0x2bbb30e2, 0x5cbc0074, 0xc5b551ce, 0xb2b26158, 0x04d44c65, 0x73d37cf3,
0xeada2d49, 0x9ddd1ddf, 0x03b9887c, 0x74beb8ea, 0xedb7e950, 0x9ab0d9c6,
0x0a0fc457, 0x7d08f4c1, 0xe401a57b, 0x930695ed, 0x0d62004e, 0x7a6530d8,
0xe36c6162, 0x946b51f4, 0x19635c01, 0x6e646c97, 0xf76d3d2d, 0x806a0dbb,
0x1e0e9818, 0x6909a88e, 0xf000f934, 0x8707c9a2, 0x17b8d433, 0x60bfe4a5,
0xf9b6b51f, 0x8eb18589, 0x10d5102a, 0x67d220bc, 0xfedb7106, 0x89dc4190,
0x49662d3d, 0x3e611dab, 0xa7684c11, 0xd06f7c87, 0x4e0be924, 0x390cd9b2,
0xa0058808, 0xd702b89e, 0x47bda50f, 0x30ba9599, 0xa9b3c423, 0xdeb4f4b5,
0x40d06116, 0x37d75180, 0xaede003a, 0xd9d930ac, 0x54d13d59, 0x23d60dcf,
0xbadf5c75, 0xcdd86ce3, 0x53bcf940, 0x24bbc9d6, 0xbdb2986c, 0xcab5a8fa,
0x5a0ab56b, 0x2d0d85fd, 0xb404d447, 0xc303e4d1, 0x5d677172, 0x2a6041e4,
0xb369105e, 0xc46e20c8, 0x72080df5, 0x050f3d63, 0x9c066cd9, 0xeb015c4f,
0x7565c9ec, 0x0262f97a, 0x9b6ba8c0, 0xec6c9856, 0x7cd385c7, 0x0bd4b551,
0x92dde4eb, 0xe5dad47d, 0x7bbe41de, 0x0cb97148, 0x95b020f2, 0xe2b71064,
0x6fbf1d91, 0x18b82d07, 0x81b17cbd, 0xf6b64c2b, 0x68d2d988, 0x1fd5e91e,
0x86dcb8a4, 0xf1db8832, 0x616495a3, 0x1663a535, 0x8f6af48f, 0xf86dc419,
0x660951ba, 0x110e612c, 0x88073096, 0xff000000,
]);
function computeBluetoothReportChecksum(buffer) {
let result = 0xeada2d49 >>> 0;
for (let i = 0; i < 74; i++) {
const idx = ((result & 0xff) ^ (buffer[i] & 0xff)) & 0xff;
result = (hashTable[idx] ^ (result >>> 8)) >>> 0;
}
return result >>> 0;
}
/** Standard CRC-32 lookup table (polynomial 0xEDB88320) */
const crc32Table = (() => {
const table = [];
for (let n = 0; n < 256; n++) {
let c = n;
for (let k = 0; k < 8; k++) {
c = c & 1 ? 0xedb88320 ^ (c >>> 1) : c >>> 1;
}
table[n] = c >>> 0;
}
return table;
})();
/**
* Compute CRC-32 for a Bluetooth feature report.
* The CRC covers the HID transaction header (0x53), the report ID,
* and all payload bytes except the last 4 (which hold the CRC itself).
* Uses standard CRC-32 with final inversion.
*/
function computeFeatureReportChecksum(reportId, buffer) {
let crc = 0xffffffff >>> 0;
// Feed prefix bytes: 0x53 (SET_REPORT feature) + report ID
crc = (crc >>> 8) ^ crc32Table[(crc ^ 0x53) & 0xff];
crc = (crc >>> 8) ^ crc32Table[(crc ^ reportId) & 0xff];
// Feed payload data (exclude last 4 bytes reserved for CRC)
const dataLen = buffer.length - 4;
for (let i = 0; i < dataLen; i++) {
crc = (crc >>> 8) ^ crc32Table[(crc ^ buffer[i]) & 0xff];
}
// Final XOR (standard CRC-32 finalization)
return (crc ^ 0xffffffff) >>> 0;
}
//# sourceMappingURL=bt_checksum.js.map