How to display song currenttime and duration by using AVAudioPlayerNode

Question

I'm making an audio player using AVAudioPlayerNode and playing a song with some effect (delay, pitch change, rate change etc) works, but I'm stuck on displaying song current time and duration. AVAudioPlayerNode seems not have like AVAudioPlayer.currentTime or .duration.

I'd really appreciate if you can help me to display currenttime and duration by using AVAudioPlayerNode.

score 14 · Answer 1 · answered Dec 11 '14 at 14:39

14

For the current time, this is what I use:

- (NSTimeInterval)currentTimeInSeconds
{
    AVAudioTime *nodeTime = self.playerNode.lastRenderTime;
    AVAudioTime *playerTime = [self.playerNode playerTimeForNodeTime:nodeTime];

    NSTimeInterval seconds = (double)playerTime.sampleTime / playerTime.sampleRate; 
    return seconds;
}

In addition to the render time in an abstract time base, the player node offers conversion of this time into its own playback timeline via playerTimeForNodeTime. Also respects pausing etc.

answered Dec 11 '14 at 14:39

Thorsten Karrer

1,345
9
19

1

@KeitaBickOhshiro if it works for you, you can mark the answer as correct or upvote it to make it visible for other members. – Thorsten Karrer Dec 16 '14 at 12:48
2

This gives the actual Position but if you do AudioNode.ScheduleSegment(...) the Position will not be resetted to 0, it just continues to count. – DirtyNative Nov 10 '17 at 09:17
How do solve this, @DanielDirtyNativeMartin. please reply – Arpit B Parekh Jan 15 '18 at 06:09

score 8 · Answer 2 · answered Feb 18 '16 at 18:50

8

Here it is in swift:

private func currentTime() -> NSTimeInterval {
    if let nodeTime: AVAudioTime = myAvAudioPlayer.lastRenderTime, playerTime: AVAudioTime = myAvAudioPlayer.playerTimeForNodeTime(nodeTime) {
       return Double(Double(playerTime.sampleTime) / playerTime.sampleRate)
    }
    return 0
}

Just replace myAvAudioPlayer with your AVAudioPlayerNode!

Happy coding!

answered Feb 18 '16 at 18:50

Tomte

1,331
12
19

1

This only appears to work if the node is playing. If stopped it returns zero. – dmann200 Dec 10 '19 at 23:17

score 5 · Answer 3 · answered Oct 29 '17 at 19:36

For the duration of the AVAudioPlayerNode SWIFT 4:

func durationOfNodePlayer(_ fileUrl: URL) -> TimeInterval {
    do {

        let file = try AVAudioFile(forReading: fileUrl)
        let audioNodeFileLength = AVAudioFrameCount(file.length)
        return Double(Double(audioNodeFileLength) / 44100) //Divide by the AVSampleRateKey in the recorder settings

       } catch {

          return 0
       }

}

dengApro · Answer 4 · 2019-10-06T09:11:25.453

Swift 5:

duration time, using AVAudioPlayrtNode's AVAudioFile

extension AVAudioFile{

    var duration: TimeInterval{
        let sampleRateSong = Double(processingFormat.sampleRate)
        let lengthSongSeconds = Double(length) / sampleRateSong
        return lengthSongSeconds
    }

}

according to WWDC 2014: whats new in core audio , mins 54

Then currentTime:

extension AVAudioPlayerNode{

    var current: TimeInterval{
        if let nodeTime = lastRenderTime,let playerTime = playerTime(forNodeTime: nodeTime) {
            return Double(playerTime.sampleTime) / playerTime.sampleRate
        }
        return 0
    }
}

Thanks @Brian Becker

score 3 · Answer 5 · answered Nov 03 '14 at 07:10

3

For the duration, .length property of AVAudioFile worked. I divided the number of sample frames in the file by the sample rates(44100hz).

For the currenttime, tentatively I use UISlider.value and synthesize the value with the sample frames.

answered Nov 03 '14 at 07:10

Bick

743
2
8
18

Brian Becker · Answer 6 · 2018-08-25T11:48:11.850

0

Something like this should give you that ability...

extension AVAudioPlayerNode {
    var currentTime: TimeInterval {
    get {
        if let nodeTime: AVAudioTime = self.lastRenderTime, let playerTime: AVAudioTime = self.playerTime(forNodeTime: nodeTime) {
            return Double(playerTime.sampleTime) / playerTime.sampleRate
        }
        return 0
    }
}

edited Aug 25 '18 at 11:48

answered Aug 24 '18 at 19:31

Brian Becker

31
8

How to display song currenttime and duration by using AVAudioPlayerNode

6 Answers6