Radio Header

/*
Connections:
Rotary Encoder:
    +   -> 3.3v
    GND -> GND
    SW  -> D32
    DT  -> D34
    CLK -> D35
    OLD:
        SW  -> D13
        DT  -> D27
        CLK -> D14
Amplifier/Speakers:
    LRC  -> D25 (Both amps connected)
    BCLK -> D26 (Both amps connected)
    Din  -> D22 (Both amps connected)
    Gain -> will use this later
    SD   -> D33 (Left amp only! Connect from GPIO to right amp through resistors)
    GND  -> GND
    VIN  -> Din (5v)
RGB LED:
    Red   -> D14
    Green -> D13
    Blue  -> D12
SD Card:
    3V3  -> 3.3v
    CS   -> D5
    MOSI -> D23
    CLK  -> D18
    MISO -> D19
    GND  -> GND

*/

#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioSourceSD.h"
#include "AudioTools/AudioCodecs/CodecMP3Helix.h"

// Bluetooth Libraries==============================================================
#include <ESP_I2S.h>
#include <wav_header.h>
#include "BluetoothA2DPSink.h"

// Rotary Encoder Button Library (might not use this)===============================
#include <BfButton.h>

// RGB LEDs=========================================================================
#define LED_red   14
#define LED_green 13
#define LED_blue  12

// SD card Library and defines======================================================
#include <SD.h>
#define SD_sck  18
#define SD_miso 19
#define SD_mosi 23
#define SD_cs   5

I2SStream i2s;
I2SStream i2s_NoOutput;

auto SDConfig = i2s.defaultConfig(TX_MODE);
auto BTConfig = i2s.defaultConfig(TX_MODE);

AudioInfo BlueToothAudioInfo(44100, 2, 24);

// =====SDCard Variables=====:
const char *startFilePath="/";
const char* ext="mp3";
AudioSourceSD source(startFilePath, ext);
MP3DecoderHelix decoder;
AudioPlayer player(source, i2s, decoder);

BluetoothA2DPSink a2dp_sink(i2s);

// Other Libraries==================================================================
#include <string>
#include <cstdint>

int RE_DT     = 34;
int RE_CLK    = 35;
int RE_Button = 32;
int max_RE_Value = 98;
int min_RE_Value = 0;
BfButton btn(BfButton::STANDALONE_DIGITAL, RE_Button, true, LOW);

int counter = 0;
int aState;
int aLastState;
int reading = 0;
uint32_t runTime = -99999;

enum playbackMode
{
    initBluetooth,
    bluetoothMode,
    deInitBluetooth,
    initSDCard,
    SDcardMode,
    deInitSDCard
};

playbackMode currentState = initBluetooth; // This determines what mode we start in and is a global to maintain state;

// Function Prototypes =============================================================

void handleBluetooth();

void handleSDcard();

void avrc_metadata_callback(uint8_t data1, const uint8_t *data2);

void parseBluetoothData(uint8_t address, const uint8_t *data);

void pressHandler (BfButton *btn, BfButton::press_pattern_t pattern);

void printMetaData(MetaDataType type, const char* str, int len);