examples/avrcp_as_sink.html

<html>

<head>
    <style>
        * {
            font-family: sans-serif;
        }
    </style>
</head>
<body>
    Server Port <input id="port" type="text" value="8989"></input> <button id="connectButton" onclick="connect()">Connect</button><br>
    <div id="socketState"></div>
    <br>
    <div id="buttons"></div><br>
    <hr>
    <button onclick="onGetPlayStatusButtonClicked()">Get Play Status</button><br>
    <div id="getPlayStatusResponseTable"></div>
    <hr>
    <button onclick="onGetElementAttributesButtonClicked()">Get Element Attributes</button><br>
    <div id="getElementAttributesResponseTable"></div>
    <hr>
    <table>
        <tr>
            <b>VOLUME</b>:
            <button onclick="onVolumeDownButtonClicked()">-</button>
            <button onclick="onVolumeUpButtonClicked()">+</button>&nbsp;
            <span id="volumeText"></span><br>
        </tr>
        <tr>
            <td><b>PLAYBACK STATUS</b></td><td><span id="playbackStatusText"></span></td>
        </tr>
        <tr>
            <td><b>POSITION</b></td><td><span id="positionText"></span></td>
        </tr>
        <tr>
            <td><b>TRACK</b></td><td><span id="trackText"></span></td>
        </tr>
        <tr>
            <td><b>ADDRESSED PLAYER</b></td><td><span id="addressedPlayerText"></span></td>
        </tr>
        <tr>
            <td><b>UID COUNTER</b></td><td><span id="uidCounterText"></span></td>
        </tr>
        <tr>
            <td><b>SUPPORTED EVENTS</b></td><td><span id="supportedEventsText"></span></td>
        </tr>
        <tr>
            <td><b>PLAYER SETTINGS</b></td><td><div id="playerSettingsTable"></div></td>
        </tr>
    </table>
    <script>
        const portInput = document.getElementById("port")
        const connectButton = document.getElementById("connectButton")
        const socketState = document.getElementById("socketState")
        const volumeText = document.getElementById("volumeText")
        const positionText = document.getElementById("positionText")
        const trackText = document.getElementById("trackText")
        const playbackStatusText = document.getElementById("playbackStatusText")
        const addressedPlayerText = document.getElementById("addressedPlayerText")
        const uidCounterText = document.getElementById("uidCounterText")
        const supportedEventsText = document.getElementById("supportedEventsText")
        const playerSettingsTable = document.getElementById("playerSettingsTable")
        const getPlayStatusResponseTable = document.getElementById("getPlayStatusResponseTable")
        const getElementAttributesResponseTable = document.getElementById("getElementAttributesResponseTable")
        let socket
        let volume = 0

        const keyNames = [
            "SELECT",
            "UP",
            "DOWN",
            "LEFT",
            "RIGHT",
            "RIGHT_UP",
            "RIGHT_DOWN",
            "LEFT_UP",
            "LEFT_DOWN",
            "ROOT_MENU",
            "SETUP_MENU",
            "CONTENTS_MENU",
            "FAVORITE_MENU",
            "EXIT",
            "NUMBER_0",
            "NUMBER_1",
            "NUMBER_2",
            "NUMBER_3",
            "NUMBER_4",
            "NUMBER_5",
            "NUMBER_6",
            "NUMBER_7",
            "NUMBER_8",
            "NUMBER_9",
            "DOT",
            "ENTER",
            "CLEAR",
            "CHANNEL_UP",
            "CHANNEL_DOWN",
            "PREVIOUS_CHANNEL",
            "SOUND_SELECT",
            "INPUT_SELECT",
            "DISPLAY_INFORMATION",
            "HELP",
            "PAGE_UP",
            "PAGE_DOWN",
            "POWER",
            "VOLUME_UP",
            "VOLUME_DOWN",
            "MUTE",
            "PLAY",
            "STOP",
            "PAUSE",
            "RECORD",
            "REWIND",
            "FAST_FORWARD",
            "EJECT",
            "FORWARD",
            "BACKWARD",
            "ANGLE",
            "SUBPICTURE",
            "F1",
            "F2",
            "F3",
            "F4",
            "F5",
        ]

        document.addEventListener('keydown', onKeyDown)
        document.addEventListener('keyup', onKeyUp)

        const buttons = document.getElementById("buttons")
        keyNames.forEach(name => {
            const button = document.createElement("BUTTON")
            button.appendChild(document.createTextNode(name))
            button.addEventListener("mousedown", event => {
                send({type: 'send-key-down', key: name})
            })
            button.addEventListener("mouseup", event => {
                send({type: 'send-key-up', key: name})
            })
            buttons.appendChild(button)
        })

        updateVolume(0)

        function connect() {
            socket = new WebSocket(`ws://localhost:${portInput.value}`);
            socket.onopen = _ => {
                socketState.innerText = 'OPEN'
                connectButton.disabled = true
            }
            socket.onclose = _ => {
                socketState.innerText = 'CLOSED'
                connectButton.disabled = false
            }
            socket.onerror = (error) => {
                socketState.innerText = 'ERROR'
                console.log(`ERROR: ${error}`)
                connectButton.disabled = false
            }
            socket.onmessage = (message) => {
                onMessage(JSON.parse(message.data))
            }
        }

        function send(message) {
            if (socket && socket.readyState == WebSocket.OPEN) {
                socket.send(JSON.stringify(message))
            }
        }

        function hmsText(position) {
            const h_1 = 1000 * 60 * 60
            const h = Math.floor(position / h_1)
            position -= h * h_1
            const m_1 = 1000 * 60
            const m = Math.floor(position / m_1)
            position -= m * m_1
            const s_1 = 1000
            const s = Math.floor(position / s_1)
            position -= s * s_1

            return `${h}:${m.toString().padStart(2, "0")}:${s.toString().padStart(2, "0")}:${position}`
        }

        function setTableHead(table, columns) {
            let thead = table.createTHead()
            let row = thead.insertRow()
            for (let column of columns) {
                let th = document.createElement("th")
                let text = document.createTextNode(column)
                th.appendChild(text)
                row.appendChild(th)
            }
        }

        function createTable(rows) {
            const table = document.createElement("table")

            if (rows.length != 0) {
                columns = Object.keys(rows[0])
                setTableHead(table, columns)
            }
            for (let element of rows) {
                let row = table.insertRow()
                for (key in element) {
                    let cell = row.insertCell()
                    let text = document.createTextNode(element[key])
                    cell.appendChild(text)
                }
            }
            return table
        }

        function onMessage(message) {
            console.log(message)
            if (message.type == "set-volume") {
                updateVolume(message.params.volume)
            } else if (message.type == "supported-events") {
                supportedEventsText.innerText = JSON.stringify(message.params.events)
            } else if (message.type == "playback-position-changed") {
                positionText.innerText = hmsText(message.params.position)
            } else if (message.type == "playback-status-changed") {
                playbackStatusText.innerText = message.params.status
            } else if (message.type == "player-settings-changed") {
                playerSettingsTable.replaceChildren(message.params.settings)
            } else if (message.type == "track-changed") {
                trackText.innerText = message.params.identifier
            } else if (message.type == "addressed-player-changed") {
                addressedPlayerText.innerText = JSON.stringify(message.params.player)
            } else if (message.type == "uids-changed") {
                uidCounterText.innerText = message.params.uid_counter
            } else if (message.type == "get-play-status-response") {
                getPlayStatusResponseTable.replaceChildren(message.params)
            } else if (message.type == "get-element-attributes-response") {
                getElementAttributesResponseTable.replaceChildren(createTable(message.params))
            }
        }

        function updateVolume(newVolume) {
            volume = newVolume
            volumeText.innerText = `${volume} (${Math.round(100*volume/0x7F)}%)`
        }

        function onKeyDown(event) {
            console.log(event)
            send({ type: 'send-key-down', key: event.key })
        }

        function onKeyUp(event) {
            console.log(event)
            send({ type: 'send-key-up', key: event.key })
        }

        function onVolumeUpButtonClicked() {
            updateVolume(Math.min(volume + 5, 0x7F))
            send({ type: 'set-volume', volume })
        }

        function onVolumeDownButtonClicked() {
            updateVolume(Math.max(volume - 5, 0))
            send({ type: 'set-volume', volume })
        }

        function onGetPlayStatusButtonClicked() {
            send({ type: 'get-play-status', volume })
        }

        function onGetElementAttributesButtonClicked() {
            send({ type: 'get-element-attributes' })
        }
</script>
</body>

</html>