Function MediaRecorderWrapper

src/__tests__/MediaStreamRecorder.js:1056–1366

* Implementation of https://dvcs.w3.org/hg/dap/raw-file/default/media-stream-capture/MediaRecorder.html * The MediaRecorder accepts a mediaStream as input source passed from UA. When recorder starts, * a MediaEncoder will be created and accept the mediaStream as input source. * Encoder will get t

(mediaStream)

 */

function MediaRecorderWrapper(mediaStream) {
    var self = this;

    /**
     * This method records MediaStream.
     * @method
     * @memberof MediaStreamRecorder
     * @example
     * recorder.start(5000);
     */
    this.start = function(timeSlice, __disableLogs) {
        this.timeSlice = timeSlice || 5000;

        if (!self.mimeType) {
            self.mimeType = 'video/webm';
        }

        if (self.mimeType.indexOf('audio') !== -1) {
            if (mediaStream.getVideoTracks().length && mediaStream.getAudioTracks().length) {
                var stream;
                if (!!navigator.mozGetUserMedia) {
                    stream = new MediaStream();
                    stream.addTrack(mediaStream.getAudioTracks()[0]);
                } else {
                    // webkitMediaStream
                    stream = new MediaStream(mediaStream.getAudioTracks());
                }
                mediaStream = stream;
            }
        }

        if (self.mimeType.indexOf('audio') !== -1) {
            self.mimeType = IsChrome ? 'audio/webm' : 'audio/ogg';
        }

        self.dontFireOnDataAvailableEvent = false;

        var recorderHints = {
            mimeType: self.mimeType
        };

        if (!self.disableLogs && !__disableLogs) {
            console.log('Passing following params over MediaRecorder API.', recorderHints);
        }

        if (mediaRecorder) {
            // mandatory to make sure Firefox doesn't fails to record streams 3-4 times without reloading the page.
            mediaRecorder = null;
        }

        if (IsChrome && !isMediaRecorderCompatible()) {
            // to support video-only recording on stable
            recorderHints = 'video/vp8';
        }

        // http://dxr.mozilla.org/mozilla-central/source/content/media/MediaRecorder.cpp
        // https://wiki.mozilla.org/Gecko:MediaRecorder
        // https://dvcs.w3.org/hg/dap/raw-file/default/media-stream-capture/MediaRecorder.html