Function MediaStreamRecorder

src/__tests__/MediaStreamRecorder.js:18–140

(mediaStream)

// MediaStreamRecorder.js

function MediaStreamRecorder(mediaStream) {
    if (!mediaStream) {
        throw 'MediaStream is mandatory.';
    }

    // void start(optional long timeSlice)
    // timestamp to fire "ondataavailable"
    this.start = function(timeSlice) {
        var Recorder;

        if (typeof MediaRecorder !== 'undefined') {
            Recorder = MediaRecorderWrapper;
        } else if (IsChrome || IsOpera || IsEdge) {
            if (this.mimeType.indexOf('video') !== -1) {
                Recorder = WhammyRecorder;
            } else if (this.mimeType.indexOf('audio') !== -1) {
                Recorder = StereoAudioRecorder;
            }
        }

        // video recorder (in GIF format)
        if (this.mimeType === 'image/gif') {
            Recorder = GifRecorder;
        }

        // audio/wav is supported only via StereoAudioRecorder
        // audio/pcm (int16) is supported only via StereoAudioRecorder
        if (this.mimeType === 'audio/wav' || this.mimeType === 'audio/pcm') {
            Recorder = StereoAudioRecorder;
        }

        // allows forcing StereoAudioRecorder.js on Edge/Firefox
        if (this.recorderType) {
            Recorder = this.recorderType;
        }

        mediaRecorder = new Recorder(mediaStream);
        mediaRecorder.blobs = [];

        var self = this;
        mediaRecorder.ondataavailable = function(data) {
            mediaRecorder.blobs.push(data);
            self.ondataavailable(data);
        };
        mediaRecorder.onstop = this.onstop;
        mediaRecorder.onStartedDrawingNonBlankFrames = this.onStartedDrawingNonBlankFrames;

        // Merge all data-types except "function"
        mediaRecorder = mergeProps(mediaRecorder, this);

        mediaRecorder.start(timeSlice);
    };

    this.onStartedDrawingNonBlankFrames = function() {};
    this.clearOldRecordedFrames = function() {
        if (!mediaRecorder) {
            return;
        }