Function getMixedAudioStream

src/__tests__/MediaStreamRecorder.js:574–616

()

    }

    function getMixedAudioStream() {
        // via: @pehrsons
        if (!Storage.AudioContextConstructor) {
            Storage.AudioContextConstructor = new Storage.AudioContext();
        }

        self.audioContext = Storage.AudioContextConstructor;

        self.audioSources = [];

        if (self.useGainNode === true) {
            self.gainNode = self.audioContext.createGain();
            self.gainNode.connect(self.audioContext.destination);
            self.gainNode.gain.value = 0; // don't hear self
        }

        var audioTracksLength = 0;
        arrayOfMediaStreams.forEach(function(stream) {
            if (!stream.getAudioTracks().length) {
                return;
            }

            audioTracksLength++;

            var audioSource = self.audioContext.createMediaStreamSource(stream);

            if (self.useGainNode === true) {
                audioSource.connect(self.gainNode);
            }

            self.audioSources.push(audioSource);
        });

        if (!audioTracksLength) {
            return;
        }

        self.audioDestination = self.audioContext.createMediaStreamDestination();
        self.audioSources.forEach(function(audioSource) {
            audioSource.connect(self.audioDestination);
        });
        return self.audioDestination.stream;
    }

    function getVideo(stream) {
        var video = document.createElement('video');