Momentum-Apps/morse_code/morse_code_worker.c

#include "morse_code_worker.h"
#include <furi_hal.h>
#include <lib/flipper_format/flipper_format.h>


#define TAG "MorseCodeWorker"

#define MORSE_CODE_VERSION 0

//A-Z0-1
const char morse_array[36][6] ={
    ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-", ".-..", "--", "-.", "---", ".--.",
    "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--..", ".----", "..---", "...--", "....-", ".....",
    "-....", "--...", "---..", "----.", "-----"
    };
const char symbol_array[36] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
    'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0'};

struct MorseCodeWorker {
    FuriThread* thread;
    MorseCodeWorkerCallback callback;
    void* callback_context;
    bool is_running;
    bool play;
    float volume;
    uint32_t dit_delta;
    FuriString* buffer;
    FuriString* words;
};

void morse_code_worker_fill_buffer(MorseCodeWorker* instance, uint32_t duration){
    FURI_LOG_D("MorseCode: Duration", "%ld", duration);
    if( duration <= instance->dit_delta)
        furi_string_push_back(instance->buffer, *DOT);
    else if(duration <= (instance->dit_delta * 3))
        furi_string_push_back(instance->buffer, *LINE);
    if(furi_string_size(instance->buffer) > 5)
        furi_string_reset(instance->buffer);
    FURI_LOG_D("MorseCode: Buffer", "%s", furi_string_get_cstr(instance->buffer));
}

void morse_code_worker_fill_letter(MorseCodeWorker* instance){
    if(furi_string_size(instance->words) > 63)
        furi_string_reset(instance->words);
    for (size_t i = 0; i < sizeof(morse_array); i++){
            if(furi_string_cmp_str(instance->buffer, morse_array[i]) == 0){
                furi_string_push_back(instance->words, symbol_array[i]);
                furi_string_reset(instance->buffer);
                break;
            }        
        }
    FURI_LOG_D("MorseCode: Words", "%s", furi_string_get_cstr(instance->words));
}


static int32_t morse_code_worker_thread_callback(void* context) {
    furi_assert(context);
    MorseCodeWorker* instance = context;
    bool was_playing = false;
    uint32_t start_tick = 0;
    uint32_t end_tick = 0;
    bool pushed = true;
    bool spaced = true;
    while(instance->is_running){
        furi_delay_ms(SLEEP);
        if(instance->play){
            if(!was_playing){
                start_tick = furi_get_tick();
                furi_hal_speaker_start(FREQUENCY, instance->volume);
                was_playing = true;
            }
        }else{
            if(was_playing){
                pushed = false;
                spaced = false;
                furi_hal_speaker_stop();
                end_tick = furi_get_tick();
                was_playing = false;
                morse_code_worker_fill_buffer(instance, end_tick - start_tick);
                start_tick = 0;
            }
        }
       if(!pushed){
            if(end_tick + (instance->dit_delta * 3) < furi_get_tick()){
                //NEW LETTER
                morse_code_worker_fill_letter(instance);
                if(instance->callback)
                        instance->callback(instance->words, instance->callback_context);
                pushed = true;
            }
        }
        if(!spaced){
            if(end_tick + (instance->dit_delta * 7) < furi_get_tick()){
                //NEW WORD
                furi_string_push_back(instance->words, *SPACE);
                if(instance->callback)
                        instance->callback(instance->words, instance->callback_context);
                spaced = true;
            }
        }
    }
    return 0;
}

MorseCodeWorker* morse_code_worker_alloc() {
    MorseCodeWorker* instance = malloc(sizeof(MorseCodeWorker));
    instance->thread = furi_thread_alloc();
    furi_thread_set_name(instance->thread, "MorseCodeWorker");
    furi_thread_set_stack_size(instance->thread, 1024);
    furi_thread_set_context(instance->thread, instance);
    furi_thread_set_callback(instance->thread, morse_code_worker_thread_callback);
    instance->play = false;
    instance->volume = 1.0f;
    instance->dit_delta = 150;
    instance->buffer = furi_string_alloc_set_str("");
    instance->words = furi_string_alloc_set_str("");
    return instance;
}

void morse_code_worker_free(MorseCodeWorker* instance) {
    furi_assert(instance);
    furi_thread_free(instance->thread);
    free(instance);
}

void morse_code_worker_set_callback(
    MorseCodeWorker* instance,
    MorseCodeWorkerCallback callback,
    void* context) {
    furi_assert(instance);
    instance->callback = callback;
    instance->callback_context = context;
}

void morse_code_worker_play(MorseCodeWorker* instance, bool play){
    furi_assert(instance);
    instance->play = play;
}

void morse_code_worker_set_volume(MorseCodeWorker* instance, float level){
    furi_assert(instance);
    instance->volume = level;
}

void morse_code_worker_set_dit_delta(MorseCodeWorker* instance, uint32_t delta){
    furi_assert(instance);
    instance->dit_delta = delta;
}

void morse_code_worker_start(MorseCodeWorker* instance) {
    furi_assert(instance);
    furi_assert(instance->is_running == false);
    instance->is_running = true;
    furi_thread_start(instance->thread);
    FURI_LOG_D("MorseCode: Start", "is Running");
}

void morse_code_worker_stop(MorseCodeWorker* instance) {
    furi_assert(instance);
    furi_assert(instance->is_running == true);
    instance->is_running = false;
    furi_thread_join(instance->thread);
    FURI_LOG_D("MorseCode: Stop", "Stop");
}