Change Network and Hardware Latency

[ReComplexed]

Hi,
This is a feature request:
Is it possible to add 2 options for Latency:
One for the actual device DSP Buffer Size and one for the Network Buffer Size?

Im getting around 200-300 ms of latency, and I want to be able to reduce that to like 40 (I have tested it out on my Laptop, our network Infrastructure can handle such small latency).

Hope this feature get's added soon!

[gavv]

Hi,

Some notes on how it can be implemented.

Receiver's pipeline latency, which includes network buffer and dsp buffer, corresponds to targetLatency in receiver config: https://github.com/roc-streaming/roc-java/blob/f075447d89c91456d860ad135b59ee7601115c84/src/main/java/org/rocstreaming/roctoolkit/ReceiverConfig.java#L134

For sender, there is no such setting, because it does not have network buffer.

There is also audio I/O latency, which corresponds to buffer size of AudioTrack (from Android API). We already ask it to use minimum possible buffer, so I don't think it needs configuration from UI.

• roc-droid/app/src/main/java/org/rocstreaming/rocdroid/SenderReceiverService.kt

  Line 389 in 900a933

  val bufferSize = AudioTrack.getMinBufferSize(

• roc-droid/app/src/main/java/org/rocstreaming/rocdroid/SenderReceiverService.kt

  Line 399 in 900a933

  setPerformanceMode(AudioTrack.PERFORMANCE_MODE_LOW_LATENCY)

Hence, I think all we need is to add one new filed to receiver tab, say, "Target latency, milliseconds", set its default value to, say, 200ms, and pass its value to ReceiverConfig.targetLatency.

[ReComplexed]

Another thing to notice is that after a new value is entered in the GUI, the stream settings have to be reapplied or the stream has to be restarted.

(Sorry I accidentally posted with my ALT before)

[githubashutoshsoni]

Can I take this up? I see there is a way to add the entered value the 200 should be added to sampleRateHz in the getMinBufferSize as below?

AudioTrack.getMinBufferSize(
            200,
            audioFormat.channelMask,
            audioFormat.encoding
        )

[gavv]

See my comment above regarding I/O latency, it's already minimum. Also, sample rate has nothing to do with latency.