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receiver.js
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receiver.js
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let currentStream = null;
let mediaRecorder = null;
let recordedChunks = [];
let isRecording = false;
// Getting references to buttons and other elements
const toggleRecordingButton = document.getElementById('toggle-recording');
const downloadButton = document.getElementById('download-recording');
const player = document.getElementById('player');
const echoMessageElement = document.getElementById('echo-msg');
const transcriptionBox = document.getElementById('transcriptionBox');
function printErrorMessage(message) {
echoMessageElement.innerText = message;
console.error(message);
}
// Stop video play-out and stop the MediaStreamTracks.
function shutdownReceiver() {
if (!currentStream) {
return;
}
player.srcObject = null;
const tracks = currentStream.getTracks();
for (let i = 0; i < tracks.length; ++i) {
tracks[i].stop();
}
currentStream = null;
}
function playCapturedStream(stream) {
if (!stream) {
printErrorMessage(
'Error starting tab capture: ' +
(chrome.runtime.lastError.message || 'UNKNOWN')
);
return;
}
if (currentStream != null) {
shutdownReceiver();
}
currentStream = stream;
player.setAttribute('controls', '1');
player.srcObject = stream;
player.play();
}
function testGetMediaStreamId(targetTabId, consumerTabId) {
chrome.tabCapture.getMediaStreamId(
{ targetTabId, consumerTabId },
function (streamId) {
if (typeof streamId !== 'string') {
printErrorMessage(
'Failed to get media stream id: ' +
(chrome.runtime.lastError.message || 'UNKNOWN')
);
return;
}
navigator.webkitGetUserMedia(
{
audio: {
mandatory: {
chromeMediaSource: 'tab',
chromeMediaSourceId: streamId
}
},
video: false
},
function (stream) {
playCapturedStream(stream);
},
function (error) {
printErrorMessage(error);
}
);
}
);
}
toggleRecordingButton.addEventListener('click', function() {
if (isRecording) {
stopRecording();
} else {
startRecording();
}
});
downloadButton.addEventListener('click', function() {
downloadRecording();
});
let segmentLength = 4000; // 4 seconds in milliseconds
let currentTimer;
function startRecording() {
// Disable the download button when starting a new recording
downloadButton.disabled = true;
recordedChunks = [];
mediaRecorder = new MediaRecorder(currentStream);
mediaRecorder.ondataavailable = function(event) {
if (event.data.size > 0) {
recordedChunks.push(event.data);
}
};
// Start the recording
mediaRecorder.start();
currentTimer = setInterval(function() {
// Stop the current recording
mediaRecorder.stop();
// Process the chunks immediately after stopping
if (recordedChunks.length > 0) {
const segmentBlob = new Blob(recordedChunks, { type: 'audio/webm' });
sendToAPI(segmentBlob);
// Reset recordedChunks
recordedChunks = [];
}
// Start a new recording immediately
mediaRecorder.start();
}, segmentLength);
isRecording = true;
toggleRecordingButton.innerText = 'Stop Recording';
}
function stopRecording() {
if (!mediaRecorder) return;
clearInterval(currentTimer); // Stop the interval set for sending segments
mediaRecorder.stop();
// Process remaining chunks if any
if (recordedChunks.length > 0) {
const remainingBlob = new Blob(recordedChunks, { type: 'audio/webm' });
sendToAPI(remainingBlob);
}
isRecording = false;
toggleRecordingButton.innerText = 'Start Recording';
downloadButton.disabled = false;
shutdownReceiver();
window.close();
}
function downloadRecording() {
const blob = new Blob(recordedChunks, {
type: 'audio/webm'
});
// Send the blob to the API
sendToAPI(blob);
// Download the blob
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
document.body.appendChild(a);
a.style = 'display: none';
a.href = url;
a.download = 'recorded_audio.webm';
a.click();
window.URL.revokeObjectURL(url);
}
async function sendToAPI(audioBlob) {
if (!audioBlob) {
console.error("No audio data provided");
return;
}
const formData = new FormData();
formData.append('audio', audioBlob, 'audio.webm');
try {
const response = await fetch('https://podify-backend.onrender.com/transcribe', {
method: 'POST',
body: formData
});
if (!response.ok) {
const responseData = await response.text();
console.error(`Server responded with ${response.status}: ${responseData}`);
return { error: `Server responded with ${response.status}: ${responseData}` };
}
return { success: true };
} catch (error) {
console.error('There was a problem with the fetch operation:', error.message);
return { error: 'There was a problem with the fetch operation: ' + error.message };
}
}
function displayTranscription(result) {
if (result && result.transcript) {
transcriptionBox.value = result.transcript;
} else {
transcriptionBox.value = "Failed to get transcription.";
}
}
chrome.runtime.onMessage.addListener(function (request) {
const { targetTabId, consumerTabId } = request;
testGetMediaStreamId(targetTabId, consumerTabId);
});
window.addEventListener('beforeunload', shutdownReceiver);