mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-03 01:39:17 +00:00
93 lines
3.5 KiB
C
93 lines
3.5 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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#include <inttypes.h>
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#include <furi/core/string.h>
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#include <furi.h>
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#include <furi_hal.h>
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#include "raw_samples.h"
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/* Allocate and initialize a samples buffer. */
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RawSamplesBuffer* raw_samples_alloc(void) {
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RawSamplesBuffer* buf = malloc(sizeof(*buf));
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buf->mutex = furi_mutex_alloc(FuriMutexTypeNormal);
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raw_samples_reset(buf);
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return buf;
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}
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/* Free a sample buffer. Should be called when the mutex is released. */
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void raw_samples_free(RawSamplesBuffer* s) {
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furi_mutex_free(s->mutex);
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free(s);
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}
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/* This just set all the samples to zero and also resets the internal
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* index. There is no need to call it after raw_samples_alloc(), but only
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* when one wants to reset the whole buffer of samples. */
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void raw_samples_reset(RawSamplesBuffer* s) {
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furi_mutex_acquire(s->mutex, FuriWaitForever);
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s->total = RAW_SAMPLES_NUM;
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s->idx = 0;
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s->short_pulse_dur = 0;
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memset(s->samples, 0, sizeof(s->samples));
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furi_mutex_release(s->mutex);
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}
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/* Set the raw sample internal index so that what is currently at
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* offset 'offset', will appear to be at 0 index. */
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void raw_samples_center(RawSamplesBuffer* s, uint32_t offset) {
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s->idx = (s->idx + offset) % RAW_SAMPLES_NUM;
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}
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/* Add the specified sample in the circular buffer. */
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void raw_samples_add(RawSamplesBuffer* s, bool level, uint32_t dur) {
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furi_mutex_acquire(s->mutex, FuriWaitForever);
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s->samples[s->idx].level = level;
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s->samples[s->idx].dur = dur;
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s->idx = (s->idx + 1) % RAW_SAMPLES_NUM;
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furi_mutex_release(s->mutex);
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}
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/* This is like raw_samples_add(), however in case a sample of the
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* same level of the previous one is added, the duration of the last
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* sample is updated instead. Needed mainly for the decoders build_message()
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* methods: it is simpler to write an encoder of a signal like that,
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* just creating messages piece by piece.
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*
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* This function is a bit slower so the internal data sampling should
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* be performed with raw_samples_add(). */
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void raw_samples_add_or_update(RawSamplesBuffer* s, bool level, uint32_t dur) {
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furi_mutex_acquire(s->mutex, FuriWaitForever);
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uint32_t previdx = (s->idx - 1) % RAW_SAMPLES_NUM;
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if(s->samples[previdx].level == level && s->samples[previdx].dur != 0) {
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/* Update the last sample: it has the same level. */
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s->samples[previdx].dur += dur;
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} else {
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/* Add a new sample. */
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s->samples[s->idx].level = level;
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s->samples[s->idx].dur = dur;
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s->idx = (s->idx + 1) % RAW_SAMPLES_NUM;
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}
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furi_mutex_release(s->mutex);
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}
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/* Get the sample from the buffer. It is possible to use out of range indexes
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* as 'idx' because the modulo operation will rewind back from the start. */
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void raw_samples_get(RawSamplesBuffer* s, uint32_t idx, bool* level, uint32_t* dur) {
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furi_mutex_acquire(s->mutex, FuriWaitForever);
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idx = (s->idx + idx) % RAW_SAMPLES_NUM;
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*level = s->samples[idx].level;
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*dur = s->samples[idx].dur;
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furi_mutex_release(s->mutex);
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}
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/* Copy one buffer to the other, including current index. */
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void raw_samples_copy(RawSamplesBuffer* dst, RawSamplesBuffer* src) {
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furi_mutex_acquire(src->mutex, FuriWaitForever);
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furi_mutex_acquire(dst->mutex, FuriWaitForever);
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dst->idx = src->idx;
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dst->short_pulse_dur = src->short_pulse_dur;
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memcpy(dst->samples, src->samples, sizeof(dst->samples));
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furi_mutex_release(src->mutex);
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furi_mutex_release(dst->mutex);
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}
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