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-rw-r--r--src/input_common/helpers/joycon_protocol/rumble.cpp299
1 files changed, 299 insertions, 0 deletions
diff --git a/src/input_common/helpers/joycon_protocol/rumble.cpp b/src/input_common/helpers/joycon_protocol/rumble.cpp
new file mode 100644
index 000000000..63b60c946
--- /dev/null
+++ b/src/input_common/helpers/joycon_protocol/rumble.cpp
@@ -0,0 +1,299 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <algorithm>
+#include <cmath>
+
+#include "common/logging/log.h"
+#include "input_common/helpers/joycon_protocol/rumble.h"
+
+namespace InputCommon::Joycon {
+
+RumbleProtocol::RumbleProtocol(std::shared_ptr<JoyconHandle> handle)
+ : JoyconCommonProtocol(std::move(handle)) {}
+
+DriverResult RumbleProtocol::EnableRumble(bool is_enabled) {
+ LOG_DEBUG(Input, "Enable Rumble");
+ ScopedSetBlocking sb(this);
+ const std::array<u8, 1> buffer{static_cast<u8>(is_enabled ? 1 : 0)};
+ return SendSubCommand(SubCommand::ENABLE_VIBRATION, buffer);
+}
+
+DriverResult RumbleProtocol::SendVibration(const VibrationValue& vibration) {
+ std::array<u8, sizeof(DefaultVibrationBuffer)> buffer{};
+
+ if (vibration.high_amplitude <= 0.0f && vibration.low_amplitude <= 0.0f) {
+ return SendVibrationReport(DefaultVibrationBuffer);
+ }
+
+ // Protect joycons from damage from strong vibrations
+ const f32 clamp_amplitude =
+ 1.0f / std::max(1.0f, vibration.high_amplitude + vibration.low_amplitude);
+
+ const u16 encoded_high_frequency = EncodeHighFrequency(vibration.high_frequency);
+ const u8 encoded_high_amplitude =
+ EncodeHighAmplitude(vibration.high_amplitude * clamp_amplitude);
+ const u8 encoded_low_frequency = EncodeLowFrequency(vibration.low_frequency);
+ const u16 encoded_low_amplitude = EncodeLowAmplitude(vibration.low_amplitude * clamp_amplitude);
+
+ buffer[0] = static_cast<u8>(encoded_high_frequency & 0xFF);
+ buffer[1] = static_cast<u8>(encoded_high_amplitude | ((encoded_high_frequency >> 8) & 0x01));
+ buffer[2] = static_cast<u8>(encoded_low_frequency | ((encoded_low_amplitude >> 8) & 0x80));
+ buffer[3] = static_cast<u8>(encoded_low_amplitude & 0xFF);
+
+ // Duplicate rumble for now
+ buffer[4] = buffer[0];
+ buffer[5] = buffer[1];
+ buffer[6] = buffer[2];
+ buffer[7] = buffer[3];
+
+ return SendVibrationReport(buffer);
+}
+
+u16 RumbleProtocol::EncodeHighFrequency(f32 frequency) const {
+ const u8 new_frequency =
+ static_cast<u8>(std::clamp(std::log2(frequency / 10.0f) * 32.0f, 0.0f, 255.0f));
+ return static_cast<u16>((new_frequency - 0x60) * 4);
+}
+
+u8 RumbleProtocol::EncodeLowFrequency(f32 frequency) const {
+ const u8 new_frequency =
+ static_cast<u8>(std::clamp(std::log2(frequency / 10.0f) * 32.0f, 0.0f, 255.0f));
+ return static_cast<u8>(new_frequency - 0x40);
+}
+
+u8 RumbleProtocol::EncodeHighAmplitude(f32 amplitude) const {
+ // More information about these values can be found here:
+ // https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering/blob/master/rumble_data_table.md
+
+ static constexpr std::array<std::pair<f32, int>, 101> high_fequency_amplitude{
+ std::pair<f32, int>{0.0f, 0x0},
+ {0.01f, 0x2},
+ {0.012f, 0x4},
+ {0.014f, 0x6},
+ {0.017f, 0x8},
+ {0.02f, 0x0a},
+ {0.024f, 0x0c},
+ {0.028f, 0x0e},
+ {0.033f, 0x10},
+ {0.04f, 0x12},
+ {0.047f, 0x14},
+ {0.056f, 0x16},
+ {0.067f, 0x18},
+ {0.08f, 0x1a},
+ {0.095f, 0x1c},
+ {0.112f, 0x1e},
+ {0.117f, 0x20},
+ {0.123f, 0x22},
+ {0.128f, 0x24},
+ {0.134f, 0x26},
+ {0.14f, 0x28},
+ {0.146f, 0x2a},
+ {0.152f, 0x2c},
+ {0.159f, 0x2e},
+ {0.166f, 0x30},
+ {0.173f, 0x32},
+ {0.181f, 0x34},
+ {0.189f, 0x36},
+ {0.198f, 0x38},
+ {0.206f, 0x3a},
+ {0.215f, 0x3c},
+ {0.225f, 0x3e},
+ {0.23f, 0x40},
+ {0.235f, 0x42},
+ {0.24f, 0x44},
+ {0.245f, 0x46},
+ {0.251f, 0x48},
+ {0.256f, 0x4a},
+ {0.262f, 0x4c},
+ {0.268f, 0x4e},
+ {0.273f, 0x50},
+ {0.279f, 0x52},
+ {0.286f, 0x54},
+ {0.292f, 0x56},
+ {0.298f, 0x58},
+ {0.305f, 0x5a},
+ {0.311f, 0x5c},
+ {0.318f, 0x5e},
+ {0.325f, 0x60},
+ {0.332f, 0x62},
+ {0.34f, 0x64},
+ {0.347f, 0x66},
+ {0.355f, 0x68},
+ {0.362f, 0x6a},
+ {0.37f, 0x6c},
+ {0.378f, 0x6e},
+ {0.387f, 0x70},
+ {0.395f, 0x72},
+ {0.404f, 0x74},
+ {0.413f, 0x76},
+ {0.422f, 0x78},
+ {0.431f, 0x7a},
+ {0.44f, 0x7c},
+ {0.45f, 0x7e},
+ {0.46f, 0x80},
+ {0.47f, 0x82},
+ {0.48f, 0x84},
+ {0.491f, 0x86},
+ {0.501f, 0x88},
+ {0.512f, 0x8a},
+ {0.524f, 0x8c},
+ {0.535f, 0x8e},
+ {0.547f, 0x90},
+ {0.559f, 0x92},
+ {0.571f, 0x94},
+ {0.584f, 0x96},
+ {0.596f, 0x98},
+ {0.609f, 0x9a},
+ {0.623f, 0x9c},
+ {0.636f, 0x9e},
+ {0.65f, 0xa0},
+ {0.665f, 0xa2},
+ {0.679f, 0xa4},
+ {0.694f, 0xa6},
+ {0.709f, 0xa8},
+ {0.725f, 0xaa},
+ {0.741f, 0xac},
+ {0.757f, 0xae},
+ {0.773f, 0xb0},
+ {0.79f, 0xb2},
+ {0.808f, 0xb4},
+ {0.825f, 0xb6},
+ {0.843f, 0xb8},
+ {0.862f, 0xba},
+ {0.881f, 0xbc},
+ {0.9f, 0xbe},
+ {0.92f, 0xc0},
+ {0.94f, 0xc2},
+ {0.96f, 0xc4},
+ {0.981f, 0xc6},
+ {1.003f, 0xc8},
+ };
+
+ for (const auto& [amplitude_value, code] : high_fequency_amplitude) {
+ if (amplitude <= amplitude_value) {
+ return static_cast<u8>(code);
+ }
+ }
+
+ return static_cast<u8>(high_fequency_amplitude[high_fequency_amplitude.size() - 1].second);
+}
+
+u16 RumbleProtocol::EncodeLowAmplitude(f32 amplitude) const {
+ // More information about these values can be found here:
+ // https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering/blob/master/rumble_data_table.md
+
+ static constexpr std::array<std::pair<f32, int>, 101> high_fequency_amplitude{
+ std::pair<f32, int>{0.0f, 0x0040},
+ {0.01f, 0x8040},
+ {0.012f, 0x0041},
+ {0.014f, 0x8041},
+ {0.017f, 0x0042},
+ {0.02f, 0x8042},
+ {0.024f, 0x0043},
+ {0.028f, 0x8043},
+ {0.033f, 0x0044},
+ {0.04f, 0x8044},
+ {0.047f, 0x0045},
+ {0.056f, 0x8045},
+ {0.067f, 0x0046},
+ {0.08f, 0x8046},
+ {0.095f, 0x0047},
+ {0.112f, 0x8047},
+ {0.117f, 0x0048},
+ {0.123f, 0x8048},
+ {0.128f, 0x0049},
+ {0.134f, 0x8049},
+ {0.14f, 0x004a},
+ {0.146f, 0x804a},
+ {0.152f, 0x004b},
+ {0.159f, 0x804b},
+ {0.166f, 0x004c},
+ {0.173f, 0x804c},
+ {0.181f, 0x004d},
+ {0.189f, 0x804d},
+ {0.198f, 0x004e},
+ {0.206f, 0x804e},
+ {0.215f, 0x004f},
+ {0.225f, 0x804f},
+ {0.23f, 0x0050},
+ {0.235f, 0x8050},
+ {0.24f, 0x0051},
+ {0.245f, 0x8051},
+ {0.251f, 0x0052},
+ {0.256f, 0x8052},
+ {0.262f, 0x0053},
+ {0.268f, 0x8053},
+ {0.273f, 0x0054},
+ {0.279f, 0x8054},
+ {0.286f, 0x0055},
+ {0.292f, 0x8055},
+ {0.298f, 0x0056},
+ {0.305f, 0x8056},
+ {0.311f, 0x0057},
+ {0.318f, 0x8057},
+ {0.325f, 0x0058},
+ {0.332f, 0x8058},
+ {0.34f, 0x0059},
+ {0.347f, 0x8059},
+ {0.355f, 0x005a},
+ {0.362f, 0x805a},
+ {0.37f, 0x005b},
+ {0.378f, 0x805b},
+ {0.387f, 0x005c},
+ {0.395f, 0x805c},
+ {0.404f, 0x005d},
+ {0.413f, 0x805d},
+ {0.422f, 0x005e},
+ {0.431f, 0x805e},
+ {0.44f, 0x005f},
+ {0.45f, 0x805f},
+ {0.46f, 0x0060},
+ {0.47f, 0x8060},
+ {0.48f, 0x0061},
+ {0.491f, 0x8061},
+ {0.501f, 0x0062},
+ {0.512f, 0x8062},
+ {0.524f, 0x0063},
+ {0.535f, 0x8063},
+ {0.547f, 0x0064},
+ {0.559f, 0x8064},
+ {0.571f, 0x0065},
+ {0.584f, 0x8065},
+ {0.596f, 0x0066},
+ {0.609f, 0x8066},
+ {0.623f, 0x0067},
+ {0.636f, 0x8067},
+ {0.65f, 0x0068},
+ {0.665f, 0x8068},
+ {0.679f, 0x0069},
+ {0.694f, 0x8069},
+ {0.709f, 0x006a},
+ {0.725f, 0x806a},
+ {0.741f, 0x006b},
+ {0.757f, 0x806b},
+ {0.773f, 0x006c},
+ {0.79f, 0x806c},
+ {0.808f, 0x006d},
+ {0.825f, 0x806d},
+ {0.843f, 0x006e},
+ {0.862f, 0x806e},
+ {0.881f, 0x006f},
+ {0.9f, 0x806f},
+ {0.92f, 0x0070},
+ {0.94f, 0x8070},
+ {0.96f, 0x0071},
+ {0.981f, 0x8071},
+ {1.003f, 0x0072},
+ };
+
+ for (const auto& [amplitude_value, code] : high_fequency_amplitude) {
+ if (amplitude <= amplitude_value) {
+ return static_cast<u16>(code);
+ }
+ }
+
+ return static_cast<u16>(high_fequency_amplitude[high_fequency_amplitude.size() - 1].second);
+}
+
+} // namespace InputCommon::Joycon
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