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https://github.com/cemu-project/DS4Windows.git
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Use unsafe blocks in project
Memory pointer access is needed to improve performance with basic input report copying as well as CRC32 validation
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@ -276,7 +276,7 @@ namespace DS4Windows
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return crc;
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return crc;
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}
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}
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public static uint CalculateFasterBTHash(ref uint seed, ref byte[] buffer, ref int start, ref int size)
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public static unsafe uint CalculateFasterBTHash(ref uint seed, ref byte[] buffer, ref int start, ref int size)
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{
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{
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/*uint crc = seed;
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/*uint crc = seed;
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for (int i = start; i < size + start; i++)
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for (int i = start; i < size + start; i++)
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@ -288,24 +288,26 @@ namespace DS4Windows
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int i = start;
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int i = start;
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int bufsize = size;
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int bufsize = size;
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//while (bufsize >= 16)
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//while (bufsize >= 16)
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fixed (byte* byteP = buffer)
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{
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for (int j = 0; j < 4; j++)
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for (int j = 0; j < 4; j++)
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{
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{
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uint one = (buffer[i++] |
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uint one = (byteP[i++] |
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(uint)(buffer[i++] << 8) |
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(uint)(byteP[i++] << 8) |
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(uint)(buffer[i++] << 16) |
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(uint)(byteP[i++] << 16) |
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(uint)(buffer[i++] << 24)) ^ crc;
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(uint)(byteP[i++] << 24)) ^ crc;
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uint two = buffer[i++] |
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uint two = byteP[i++] |
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(uint)(buffer[i++] << 8) |
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(uint)(byteP[i++] << 8) |
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(uint)(buffer[i++] << 16) |
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(uint)(byteP[i++] << 16) |
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(uint)(buffer[i++] << 24);
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(uint)(byteP[i++] << 24);
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uint three = (buffer[i++] |
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uint three = (byteP[i++] |
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(uint)(buffer[i++] << 8) |
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(uint)(byteP[i++] << 8) |
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(uint)(buffer[i++] << 16) |
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(uint)(byteP[i++] << 16) |
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(uint)(buffer[i++] << 24));
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(uint)(byteP[i++] << 24));
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uint four = buffer[i++] |
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uint four = byteP[i++] |
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(uint)(buffer[i++] << 8) |
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(uint)(byteP[i++] << 8) |
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(uint)(buffer[i++] << 16) |
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(uint)(byteP[i++] << 16) |
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(uint)(buffer[i++] << 24);
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(uint)(byteP[i++] << 24);
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crc = secondLook[15, one & 0xFF] ^
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crc = secondLook[15, one & 0xFF] ^
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secondLook[14, (one >> 8) & 0xFF] ^
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secondLook[14, (one >> 8) & 0xFF] ^
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@ -330,14 +332,14 @@ namespace DS4Windows
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//while (bufsize >= 8)
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//while (bufsize >= 8)
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//if (bufsize >= 8)
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//if (bufsize >= 8)
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uint one8 = (buffer[i++] |
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uint one8 = (byteP[i++] |
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(uint)(buffer[i++] << 8) |
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(uint)(byteP[i++] << 8) |
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(uint)(buffer[i++] << 16) |
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(uint)(byteP[i++] << 16) |
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(uint)(buffer[i++] << 24)) ^ crc;
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(uint)(byteP[i++] << 24)) ^ crc;
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uint two8 = buffer[i++] |
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uint two8 = byteP[i++] |
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(uint)(buffer[i++] << 8) |
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(uint)(byteP[i++] << 8) |
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(uint)(buffer[i++] << 16) |
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(uint)(byteP[i++] << 16) |
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(uint)(buffer[i++] << 24);
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(uint)(byteP[i++] << 24);
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crc = secondLook[7, one8 & 0xFF] ^
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crc = secondLook[7, one8 & 0xFF] ^
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secondLook[6, (one8 >> 8) & 0xFF] ^
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secondLook[6, (one8 >> 8) & 0xFF] ^
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secondLook[5, (one8 >> 16) & 0xFF] ^
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secondLook[5, (one8 >> 16) & 0xFF] ^
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@ -363,9 +365,10 @@ namespace DS4Windows
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//while (--bufsize >= 0)
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//while (--bufsize >= 0)
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//{
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//{
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crc = (crc >> 8) ^ defaultTable[(crc & 0xFF) ^ buffer[i++]];// i++;
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crc = (crc >> 8) ^ defaultTable[(crc & 0xFF) ^ byteP[i++]];// i++;
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crc = (crc >> 8) ^ defaultTable[(crc & 0xFF) ^ buffer[i++]];// i++;
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crc = (crc >> 8) ^ defaultTable[(crc & 0xFF) ^ byteP[i++]];// i++;
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//}
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//}
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}
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return crc;
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return crc;
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}
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}
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@ -697,7 +697,7 @@ namespace DS4Windows
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const uint DefaultPolynomial = 0xedb88320u;
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const uint DefaultPolynomial = 0xedb88320u;
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uint HamSeed = 2351727372;
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uint HamSeed = 2351727372;
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private void performDs4Input()
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private unsafe void performDs4Input()
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{
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{
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firstActive = DateTime.UtcNow;
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firstActive = DateTime.UtcNow;
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NativeMethods.HidD_SetNumInputBuffers(hDevice.safeReadHandle.DangerousGetHandle(), 2);
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NativeMethods.HidD_SetNumInputBuffers(hDevice.safeReadHandle.DangerousGetHandle(), 2);
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@ -749,7 +749,18 @@ namespace DS4Windows
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timeoutEvent = false;
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timeoutEvent = false;
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if (res == HidDevice.ReadStatus.Success)
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if (res == HidDevice.ReadStatus.Success)
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{
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{
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Array.Copy(btInputReport, 2, inputReport, 0, inputReport.Length);
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//Array.Copy(btInputReport, 2, inputReport, 0, inputReport.Length);
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fixed (byte* byteP = &btInputReport[2], imp = inputReport)
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{
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byte* btImp = byteP;
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byte* finImp = imp;
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for (int j = 0; j < BT_INPUT_REPORT_LENGTH-2;j++)
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{
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finImp[j] = btImp[j];
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//*finImp = *btImp;
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//btImp++; finImp++;
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}
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}
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//uint recvCrc32 = BitConverter.ToUInt32(btInputReport, BT_INPUT_REPORT_CRC32_POS);
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//uint recvCrc32 = BitConverter.ToUInt32(btInputReport, BT_INPUT_REPORT_CRC32_POS);
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uint recvCrc32 = btInputReport[BT_INPUT_REPORT_CRC32_POS] |
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uint recvCrc32 = btInputReport[BT_INPUT_REPORT_CRC32_POS] |
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@ -92,6 +92,7 @@
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<GenerateSerializationAssemblies>On</GenerateSerializationAssemblies>
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<GenerateSerializationAssemblies>On</GenerateSerializationAssemblies>
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<LangVersion>6</LangVersion>
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<LangVersion>6</LangVersion>
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<DebugSymbols>false</DebugSymbols>
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<DebugSymbols>false</DebugSymbols>
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<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
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</PropertyGroup>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
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<PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
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<DebugSymbols>true</DebugSymbols>
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<DebugSymbols>true</DebugSymbols>
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