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throws error when trying to start recording when already recording

This commit is contained in:
nikvaessen 2016-07-11 18:53:13 +02:00
parent e6df3e3ecf
commit 85f2fe5838
1 changed files with 76 additions and 41 deletions
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117
modules/audioRecording/audioRecorder.js
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@ -1,17 +1,10 @@
/* global $, JitsiMeetJs, MediaRecorder*/
/**
* options passed along when the MediaRecorder gets created
* Possible audio formats MIME types
*/
const AUDIO_WEBM = "audio/webm";
const AUDIO_OGG = "audio/ogg";
const MEDIA_RECORDING_OPTIONS_CHROME = {mimeType: AUDIO_WEBM}; //for chrome
const MEDIA_RECORDING_OPTIONS_FIREFOX = {mimeType: AUDIO_OGG}; //for ff
/**
* File type to convert data into when it's downloaded
*/
const FILE_TYPE = {type: 'audio/webm'};
const AUDIO_WEBM = "audio/webm"; // Supported in chrome
const AUDIO_OGG = "audio/ogg"; // Supported in firefox
/**
* Object holding all the information needed for recording a single track
@ -22,9 +15,40 @@ var TrackRecorder = function(track){
// The MediaRecorder recording the stream
this.recorder = null;
// The array of data chunks recorded from the stream
// acts as a buffer until the data is stored on disk
this.data = null;
};
/**
* Creates a TrackRecorder object. Also creates the MediaRecorder and
* data array for the trackRecorder.
* @param track the JitsiTrack holding the audio MediaStream(s)
*/
function instantiateTrackRecorder(track)
{
var trackRecorder = new TrackRecorder(track);
// Create a new stream which only holds the audio track
var originalStream = trackRecorder.track.getOriginalStream();
var stream = createEmptyStream();
originalStream.getAudioTracks().forEach(function(track){
stream.addTrack(track);
});
// Create the MediaRecorder
trackRecorder.recorder = new MediaRecorder(stream,
{mimeType: audioRecorder.fileType});
//array for holding the recorder data. Resets it when
//audio already has been recorder once
trackRecorder.data = [];
// function handling a dataEvent, e.g the stream gets new data
trackRecorder.recorder.ondataavailable = function (dataEvent) {
if(dataEvent.data.size > 0) {
trackRecorder.data.push(dataEvent.data);
}
};
return trackRecorder;
}
/**
* Determines which kind of audio recording the browser supports
* chrome supports "audio/webm" and firefox supports "audio/ogg"
@ -39,10 +63,19 @@ function determineCorrectFileType()
}
else {
throw new Error("unable to create a MediaRecorder with the" +
"right mimetype!")
"right mimetype!");
}
}
/**
* Writes the TrackRecorder.data buffer to disk to free up RAM
* @param trackRecorder
*/
function writeBufferToDisk(trackRecorder)
{
}
/**
* main exported object of the file, holding all
* relevant functions and variables for the outside world
@ -53,7 +86,10 @@ var audioRecorder= {
recorders: [],
//get which file type is supported by the current browser
fileType: determineCorrectFileType()
fileType: determineCorrectFileType(),
//boolean flag for active recording
isRecording: false
};
/**
@ -63,45 +99,41 @@ var audioRecorder= {
*/
audioRecorder.giveTrack = function (track) {
if(track.isAudioTrack()) {
console.log("added a track to the audioRecorder module");
audioRecorder.recorders.push(new TrackRecorder(track));
//create the track recorder
var trackRecorder = instantiateTrackRecorder(track);
//push it to the local array of all recorders
audioRecorder.recorders.push(trackRecorder);
//is we're already recording, immediately start recording this new track
if(audioRecorder.isRecording) {
trackRecorder.recorder.start();
}
}
};
/**
* Notifies the module that a specific track has stopped, e.g partipant left
* the conference.
* This method will tell the MediaRecorder of the specific track to stop
* recording, if //todo determine constraints
*/
audioRecorder.notifyTrackStopped = function(track){
};
/**
* Starts the audio recording of every local and remote track
*/
audioRecorder.startAudioRecording = function () {
//loop through all stored tracks and create a mediaRecorder for each stream
audioRecorder.recorders.forEach(function(trackRecorder){
//creates the recorder if not already created
if(trackRecorder.recorder == null) {
// Create a new stream which only holds the audio track
var originalStream = trackRecorder.track.getOriginalStream();
var stream = createEmptyStream();
originalStream.getAudioTracks().forEach(function(track){
stream.addTrack(track);
});
// Create the recorder
trackRecorder.recorder = new MediaRecorder(stream,
{mimeType: audioRecorder.fileType});
// function handling a dataEvent, e.g the stream gets new data
trackRecorder.recorder.ondataavailable = function (dataEvent) {
if(dataEvent.data.size > 0) {
trackRecorder.data.push(dataEvent.data);
}
};
}
//array for holding the recorder data. Resets it when
//audio already has been recorder once
trackRecorder.data = [];
});
if(audioRecorder.isRecording) {
throw new Error("audiorecorder is already recording");
}
// set boolean isRecording flag to true so if new participants join the
// conference, that track can instantly start recording as well
audioRecorder.isRecording = true;
//start all the mediaRecorders
audioRecorder.recorders.forEach(function(trackRecorder){
trackRecorder.recorder.start();
});
//log that recording has started
console.log("Started the recording of the audio. There are currently " +
audioRecorder.recorders.length + " recorders active.");
@ -111,7 +143,10 @@ audioRecorder.startAudioRecording = function () {
* Stops the audio recording of every local and remote track
*/
audioRecorder.stopAudioRecording = function() {
audioRecorder.recorders.forEach(function(trackRecorder){
//set the boolean flag to false
audioRecorder.isRecording = false;
//stop all recorders
audioRecorder.recorders.forEach(function(trackRecorder){
trackRecorder.recorder.stop();
});
};