AVPlayer streaming progress

Question

I\'m successfully using AVPlayer to stream audio from a server and what I want to do now is to show a custom UISlider who shows the progress of the

Answer 1

Personally I do not agree that the timeRanges value will always have a count of 1.

According to the documentation

The array contains NSValue objects containing a CMTimeRange value indicating the times ranges for which the player item has media data readily available. The time ranges returned may be discontinuous.

So this may have values similar to:

[(start1, end1), (start2, end2)]

From my experience with the hls.js framework within the desktop web world, the holes between these time ranges could be very small or large depending on a multitude of factors, ex: seeking, discontinuities, etc.

So to correctly get the total buffer length you would need to loop through the array and get the duration of each item and concat.

If you are looking for a buffer value from current play head you would need to filter the time ranges for a start time that's greater than the current time and an end time that's less than current time.

public extension AVPlayerItem {

    public func totalBuffer() -> Double {
        return self.loadedTimeRanges
            .map({ $0.timeRangeValue })
            .reduce(0, { acc, cur in
                return acc + CMTimeGetSeconds(cur.start) + CMTimeGetSeconds(cur.duration)
            })
    }

    public func currentBuffer() -> Double {
        let currentTime = self.currentTime()

        guard let timeRange = self.loadedTimeRanges.map({ $0.timeRangeValue })
            .first(where: { $0.containsTime(currentTime) }) else { return -1 }

        return CMTimeGetSeconds(timeRange.end) - currentTime.seconds
    }

}