ESP32/main/Kconfig.projbuild

menu "Airplay ESP Configuration"
    # Board configuration is now in components/boards/Kconfig.projbuild
    
    menu "LED Configuration"
        config LED_STATUS_BRIGHTNESS
            int "Status LED brightness (0-100% duty for the on phase)"
            range 0 255
            default 60
            help
                Brightness level for the status LED (0=off, 255=max).

        config LED_STATUS_INVERT
            bool "Invert Status LED output (active-low)"
            default y
            help
                If enabled, the status LED output is inverted (active-low).
                Use this if your LED is connected with inverted logic
                (e.g., LED cathode to GPIO instead of anode).

        config LED_ERROR_INVERT
            bool "Invert Error LED output (active-low)"
            default y
            help
                If enabled, the error LED output is inverted (active-low).
                Use this if your LED is connected with inverted logic
                (e.g., LED cathode to GPIO instead of anode).

        menu "Status LED Behavior"
            choice LED_STATUS_ON_PLAYING
                prompt "Status LED when playing"
                default LED_STATUS_PLAYING_STEADY

                config LED_STATUS_PLAYING_STEADY
                    bool "Steady"
                config LED_STATUS_PLAYING_BLINK_FAST
                    bool "Blink fast"
                config LED_STATUS_PLAYING_VU
                    bool "VU meter"
            endchoice

            choice LED_STATUS_ON_PAUSED
                prompt "Status LED when paused"
                default LED_STATUS_PAUSED_BLINK_MEDIUM

                config LED_STATUS_PAUSED_OFF
                    bool "Off"
                config LED_STATUS_PAUSED_STEADY
                    bool "Steady"
                config LED_STATUS_PAUSED_BLINK_SLOW
                    bool "Blink slow"
                config LED_STATUS_PAUSED_BLINK_MEDIUM
                    bool "Blink medium"
            endchoice

            choice LED_STATUS_ON_STANDBY
                prompt "Status LED when standby"
                default LED_STATUS_STANDBY_BLINK_SLOW

                config LED_STATUS_STANDBY_OFF
                    bool "Off"
                config LED_STATUS_STANDBY_BLINK_SLOW
                    bool "Blink slow"
                config LED_STATUS_STANDBY_BLINK_MEDIUM
                    bool "Blink medium"
            endchoice
        endmenu

        menu "RGB LED Behavior"
            choice LED_RGB_ON_PLAYING
                prompt "RGB LED when playing"
                default LED_RGB_PLAYING_VU

                config LED_RGB_PLAYING_OFF
                    bool "Off"
                config LED_RGB_PLAYING_STEADY
                    bool "Steady color"
                config LED_RGB_PLAYING_VU
                    bool "VU meter"
            endchoice

            choice LED_RGB_ON_PAUSED
                prompt "RGB LED when paused"
                default LED_RGB_PAUSED_STEADY

                config LED_RGB_PAUSED_OFF
                    bool "Off"
                config LED_RGB_PAUSED_STEADY
                    bool "Steady color"
            endchoice

            choice LED_RGB_ON_STANDBY
                prompt "RGB LED when standby"
                default LED_RGB_STANDBY_OFF

                config LED_RGB_STANDBY_OFF
                    bool "Off"
                config LED_RGB_STANDBY_STEADY
                    bool "Steady color"
            endchoice

            config LED_RGB_COLOR_PAUSED
                hex "RGB color when paused (hex)"
                default 0x000033
                help
                    RGB color in hex (0xRRGGBB) for paused state.

            config LED_RGB_COLOR_STANDBY
                hex "RGB color when standby (hex)"
                default 0x001100
                help
                    RGB color in hex (0xRRGGBB) for standby state.
        endmenu
    endmenu

    menu "WiFi Configuration"
    config DEFAULT_AP_SSID
        string "Access Point SSID"
        default "ESP32-AirPlay-Setup"
        help
            SSID (network name) the ESP32 will broadcast.

    config DEFAULT_AP_PASSWORD
        string "Access Point Password"
        default ""
        help
            Password used for the Access Point. Leave empty and set AUTH MODE to WIFI_AUTH_OPEN for no password.

    config DEFAULT_AP_CHANNEL
        int "Access Point WiFi Channel"
        default 1
        help
            Be careful you might not see the access point if you use a channel not allowed in your country.
    endmenu

    menu "Audio Output"
    choice AUDIO_OUTPUT_TYPE
        prompt "Audio output type"
        default AUDIO_OUTPUT_I2S
        help
            Select the audio output backend.

        config AUDIO_OUTPUT_I2S
            bool "I2S (standard DAC)"

        config AUDIO_OUTPUT_SPDIF
            bool "SPDIF (bit-banged via I2S)"

        config AUDIO_OUTPUT_USB
            bool "USB Audio Class (UAC)"
            depends on IDF_TARGET_ESP32S3 || IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32P4
            help
                Output audio over USB as a UAC device.
                The ESP32 appears as a USB audio source to the connected host
                (e.g. a USB amplifier or a PC for testing with Audacity).
                Requires a chip with USB OTG support.
                The USB stream defaults to 48 kHz and must match the UAC
                sample-rate setting. AirPlay audio is resampled automatically
                when needed.
    endchoice

    choice OUTPUT_SAMPLE_RATE
        prompt "Output sample rate"
        default OUTPUT_SAMPLE_RATE_44100
        depends on !DAC_TAS57XX && !DAC_TAS58XX && !AUDIO_OUTPUT_USB
        help
            Sample rate for I2S/SPDIF output. If the AirPlay source sends a
            different rate, the audio is resampled automatically.

        config OUTPUT_SAMPLE_RATE_44100
            bool "44100 Hz (native AirPlay, no resampling)"
        config OUTPUT_SAMPLE_RATE_48000
            bool "48000 Hz (resampled from 44100)"
    endchoice

    config OUTPUT_SAMPLE_RATE_HZ
        int
        default 48000 if AUDIO_OUTPUT_USB
        default 48000 if OUTPUT_SAMPLE_RATE_48000
        default 44100

    config RESAMPLER_TAPS
        int "Resampler filter taps (quality)" if OUTPUT_SAMPLE_RATE_48000
        range 4 64
        default 28 if IDF_TARGET_ESP32S3
        default 12 if IDF_TARGET_ESP32
        default 16
        help
            Number of taps for the sinc resampler filters.
            More taps = better quality but higher CPU cost.
            Must be a multiple of 4.
            ESP32-S3 (hardware FPU): 28 recommended.
            ESP32 (no FPU): 12 recommended.

    endmenu

    menu "Bluetooth Configuration"
        depends on BT_A2DP_ENABLE

        config BT_PIN_CODE
            string "Bluetooth pairing PIN code"
            default "05032026"
            help
                Static PIN code used for legacy Bluetooth pairing.
                Must be 1-16 digits. Connecting devices will be
                prompted to enter this PIN.

        config BT_SSP_ENABLED
            bool "Enable Secure Simple Pairing (SSP)"
            default n
            help
                Enable SSP for Bluetooth 2.1+ devices. When enabled,
                modern devices use numeric comparison (both sides
                confirm a displayed number) instead of the legacy PIN.
                A screen is required for this.
    endmenu

    menu "Display Configuration"
        config DISPLAY_ENABLED
            bool "Enable display"
            default n
            help
                Enable an I2C or SPI OLED display for showing track metadata,
                playback position, and a progress bar.

        if DISPLAY_ENABLED
            choice DISPLAY_DRIVER
                prompt "Display driver"
                default DISPLAY_DRIVER_SSD1306
                help
                    Select the display controller IC.

                config DISPLAY_DRIVER_SSD1306
                    bool "SSD1306 (128x64) OLED"
                config DISPLAY_DRIVER_SH1106
                    bool "SH1106 (128x64) OLED"
                config DISPLAY_DRIVER_SSD1309
                    bool "SSD1309 (128x64) OLED"
                config DISPLAY_DRIVER_SH1107
                    bool "SH1107 (128x128) OLED"
                config DISPLAY_DRIVER_ST7789
                    bool "ST7789 TFT"
            endchoice

            choice DISPLAY_HEIGHT
                prompt "Display height"
                default DISPLAY_HEIGHT_64
                depends on !DISPLAY_DRIVER_ST7789
                help
                    Select the display pixel height. 128x32 displays use
                    a compact two-line layout with scrolling text.

                config DISPLAY_HEIGHT_64
                    bool "64 pixels (128x64)"
                config DISPLAY_HEIGHT_32
                    bool "32 pixels (128x32)"
                    depends on !DISPLAY_DRIVER_SSD1309 && !DISPLAY_DRIVER_SH1107
            endchoice

            choice DISPLAY_BUS
                prompt "Display bus"
                default DISPLAY_BUS_I2C
                depends on !DISPLAY_DRIVER_ST7789
                help
                    Select the communication bus for the display.

                config DISPLAY_BUS_I2C
                    bool "I2C"
                config DISPLAY_BUS_SPI
                    bool "SPI"
            endchoice

            if DISPLAY_BUS_I2C
                config DISPLAY_I2C_SDA
                    int "Display I2C SDA GPIO"
                    default 21
                    help
                        GPIO pin for the display I2C data line.

                config DISPLAY_I2C_SCL
                    int "Display I2C SCL GPIO"
                    default 22
                    help
                        GPIO pin for the display I2C clock line.

                config DISPLAY_I2C_ADDR
                    hex "Display I2C address (7-bit)"
                    default 0x3C
                    help
                        7-bit I2C address of the OLED display.
                        Common values: 0x3C or 0x3D.
            endif

            if DISPLAY_BUS_SPI || DISPLAY_DRIVER_ST7789
                config DISPLAY_SPI_CLK
                    int "Display SPI CLK GPIO"
                    default 18
                    help
                        GPIO pin for the display SPI clock line.

                config DISPLAY_SPI_MOSI
                    int "Display SPI MOSI GPIO"
                    default 23
                    help
                        GPIO pin for the display SPI data (MOSI) line.

                config DISPLAY_SPI_CS
                    int "Display SPI CS GPIO"
                    default 5
                    help
                        GPIO pin for the display SPI chip select.

                config DISPLAY_SPI_DC
                    int "Display SPI DC GPIO"
                    default 16
                    help
                        GPIO pin for the display SPI data/command select.

                config DISPLAY_SPI_RST
                    int "Display SPI RST GPIO"
                    default -1
                    help
                        GPIO pin for the display reset line.
                        Set to -1 if not connected.

                config DISPLAY_BL_GPIO
                    int "Display backlight GPIO"
                    default -1
                    depends on DISPLAY_DRIVER_ST7789
                    help
                        GPIO pin for the display backlight.
                        Set to -1 if not used or always on.

                config DISPLAY_ST7789_WIDTH
                    int "ST7789 display width"
                    default 320
                    depends on DISPLAY_DRIVER_ST7789
                    help
                        Horizontal resolution exposed to LVGL after panel
                        rotation/mirroring.

                config DISPLAY_ST7789_HEIGHT
                    int "ST7789 display height"
                    default 170
                    depends on DISPLAY_DRIVER_ST7789
                    help
                        Vertical resolution exposed to LVGL after panel
                        rotation/mirroring.

                config DISPLAY_ST7789_GAP_X
                    int "ST7789 panel X gap"
                    default 0
                    depends on DISPLAY_DRIVER_ST7789
                    help
                        X offset passed to esp_lcd_panel_set_gap().

                config DISPLAY_ST7789_GAP_Y
                    int "ST7789 panel Y gap"
                    default 35
                    depends on DISPLAY_DRIVER_ST7789
                    help
                        Y offset passed to esp_lcd_panel_set_gap().
            endif

            config DISPLAY_FLIP
                bool "Flip display 180 degrees"
                default n
                help
                    Rotate the display output 180 degrees.

            config DISPLAY_UPDATE_MS
                int "Display refresh interval (ms)"
                default 500
                range 100 5000
                help
                    How often the display redraws in milliseconds.
        endif
    endmenu

    menu "AirPlay Protocol"
        config AIRPLAY_FORCE_V1
            bool "Legacy mode: advertise AirPlay v1 (classic) only"
            default n
            help
                By default the receiver accepts BOTH AirPlay 1 (classic
                RAOP, used by TuneBlade, AirMusic, shairtunes2, older iOS
                fallback) and AirPlay 2 (HomeKit pairing, HAP-encrypted
                transport, used by current iOS). Protocol selection is
                automatic based on the request shape.

                Enable this option only if AirPlay 2 advertisement causes
                problems on your network (e.g. iOS preferring AirPlay 2
                with broken FairPlay verification). It hides the
                _airplay._tcp service entirely, leaving only _raop._tcp
                for classic RAOP clients. iOS will fall back to AirPlay 1
                with DACP remote control.

                When disabled (default), the receiver advertises as an
                AirPlay 2 device. Modern iOS uses the MRP (Media Remote
                Protocol) for remote control in AirPlay 2 mode, which
                is not implemented, so hardware play/pause falls back
                to local mute.

                Note: AirPlay v1 does not support RSA key exchange for
                audio encryption in this codebase. The receiver will
                advertise et=0 (no encryption). If iOS refuses to connect,
                audio encryption support may need to be added.

        config AIRPLAY_TIMING_THRESHOLD_MS
            int "Early/late timing threshold for buffered streams (ms)"
            default 10
            range 2 200
            help
                Maximum amount a frame may be early or late (in milliseconds)
                before the timing engine holds it as pending (early) or drops
                it (late). Buffered AirPlay 2 streams (AAC, type 103) have a
                deep jitter buffer, so a tight threshold keeps tight sync
                without causing drop-outs.

        config AIRPLAY_RT_TIMING_THRESHOLD_MS
            int "Early/late timing threshold for unbuffered streams (ms)"
            default 50
            range 2 500
            help
                Same as above but for unbuffered realtime streams (ALAC over
                UDP, type 96). Realtime streams have little or no jitter
                buffer to absorb scheduling hiccups (e.g. when image/metadata
                arrives on the RTSP connection), so a tight threshold causes
                audible drop-outs. A larger threshold tolerates the jitter at
                the cost of slightly looser sync. Increase this if you still
                hear drop-outs on AirPlay 1 / realtime playback.

        config ENABLE_AIRPLAY_ARTWORK
            bool "Enable cover-art / artwork reception"
            default n
            help
                Receive cover-art images. Enable it only if you have a display
                cabable of and want album art.
    endmenu

    menu "Button Configuration"
        config BTN_PLAY_PAUSE_GPIO
            int "Play/Pause button GPIO (-1 to disable)"
            default -1
            range -1 48
            help
                GPIO pin for the play/pause button (active-low, internal pull-up).
                Set to -1 to disable.

        config BTN_VOLUME_UP_GPIO
            int "Volume Up button GPIO (-1 to disable)"
            default -1
            range -1 48
            help
                GPIO pin for the volume up button (active-low, internal pull-up).
                Supports long-press auto-repeat.
                Set to -1 to disable.

        config BTN_VOLUME_DOWN_GPIO
            int "Volume Down button GPIO (-1 to disable)"
            default -1
            range -1 48
            help
                GPIO pin for the volume down button (active-low, internal pull-up).
                Supports long-press auto-repeat.
                Set to -1 to disable.

        config BTN_NEXT_GPIO
            int "Next Track button GPIO (-1 to disable)"
            default -1
            range -1 48
            help
                GPIO pin for the next track button (active-low, internal pull-up).
                Set to -1 to disable.

        config BTN_PREV_GPIO
            int "Previous Track button GPIO (-1 to disable)"
            default -1
            range -1 48
            help
                GPIO pin for the previous track button (active-low, internal pull-up).
                Set to -1 to disable.

        config BTN_PLAY_PAUSE_DOUBLE_CLICK
            bool "Play/Pause double-click cycles channel mode"
            default n
            help
                When enabled, a single play/pause press is deferred until the
                double-click window expires. Two presses within that window
                cycle the audio channel mode instead of play/pause.
    endmenu
endmenu