36 lines
1.6 KiB
C
36 lines
1.6 KiB
C
// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include <stdbool.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define UNI_SWITCH2_HAPTICS_MAX_SAMPLES 3
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#define UNI_SWITCH2_HAPTICS_MAX_AMPLITUDE 453
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#define UNI_SWITCH2_HAPTICS_WATCHDOG_MS 50
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typedef struct {
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uint8_t count; // Zero leaves this side's host state/watchdog untouched.
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uint8_t samples[UNI_SWITCH2_HAPTICS_MAX_SAMPLES][5];
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} uni_switch2_haptics_side_t;
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typedef struct {
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uni_switch2_haptics_side_t sides[2]; // Physical left/right; Joy-Con uses side 0.
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} uni_switch2_haptics_frame_t;
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// Source indices64 mean160Hz(low)/320Hz(high); amplitudes are linear Q0.15.
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// Measured native frequency law: Hz ~=10*2^((code-1)/96), hence exact index mapping.
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// Linear amplitude scaling uses SDL's29000/65535 safety envelope (10-bit max453).
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void uni_switch2_haptics_encode_sample(uint8_t out[5], uint8_t low_index, uint8_t high_index,
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uint16_t low_q15, uint16_t high_q15);
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void uni_switch2_haptics_silence(uni_switch2_haptics_frame_t* frame);
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bool uni_switch2_haptics_valid(const uni_switch2_haptics_frame_t* frame);
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bool uni_switch2_haptics_is_stop(const uni_switch2_haptics_frame_t* frame);
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// Native callers validate the host envelope separately; conventional feedback
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// retains its existing full10-bit amplitude codes.
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// Requires count1..3; unused slots are zero, header selects only the valid samples.
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bool uni_switch2_haptics_write_block(uint8_t out[16], const uni_switch2_haptics_side_t* side,
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uint8_t sequence);
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#ifdef __cplusplus
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}
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#endif
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