mirror of
https://github.com/DarkFlippers/unleashed-firmware
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32 lines
1.4 KiB
C
32 lines
1.4 KiB
C
/* Copyright (C) 2022-2023 Salvatore Sanfilippo -- All Rights Reserved
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* See the LICENSE file for information about the license. */
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/* Our circular buffer of raw samples, used in order to display
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* the signal. */
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#define RAW_SAMPLES_NUM \
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2048 /* Use a power of two: we take the modulo
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of the index quite often to normalize inside
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the range, and division is slow. */
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typedef struct RawSamplesBuffer {
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FuriMutex* mutex;
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struct {
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uint16_t level : 1;
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uint16_t dur : 15;
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} samples[RAW_SAMPLES_NUM];
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uint32_t idx; /* Current idx (next to write). */
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uint32_t total; /* Total samples: same as RAW_SAMPLES_NUM, we provide
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this field for a cleaner interface with the user, but
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we always use RAW_SAMPLES_NUM when taking the modulo so
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the compiler can optimize % as bit masking. */
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/* Signal features. */
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uint32_t short_pulse_dur; /* Duration of the shortest pulse. */
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} RawSamplesBuffer;
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RawSamplesBuffer* raw_samples_alloc(void);
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void raw_samples_reset(RawSamplesBuffer* s);
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void raw_samples_center(RawSamplesBuffer* s, uint32_t offset);
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void raw_samples_add(RawSamplesBuffer* s, bool level, uint32_t dur);
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void raw_samples_get(RawSamplesBuffer* s, uint32_t idx, bool* level, uint32_t* dur);
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void raw_samples_copy(RawSamplesBuffer* dst, RawSamplesBuffer* src);
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void raw_samples_free(RawSamplesBuffer* s);
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