How to use FadeOut function

Question

I am trying to use the fadeout function in NAudio. However, I cannot understand the meaning of signatures of function. I have no idea about buffer, offset and sourceSamplesRead.

private void FadeOut(float[] buffer, int offset, int sourceSamplesRead)
    {
        int sample = 0;
        while (sample < sourceSamplesRead)
        {
            float multiplier = 1.0f - (fadeSamplePosition / (float)fadeSampleCount);
            for (int ch = 0; ch < source.WaveFormat.Channels; ch++)
            {
                buffer[offset + sample++] *= multiplier;
            }
            fadeSamplePosition++;
            if (fadeSamplePosition > fadeSampleCount)
            {
                fadeState = FadeState.Silence;
                // clear out the end
                ClearBuffer(buffer, sample + offset, sourceSamplesRead - sample);
                break;
            }
        }
    }

The documentation of NAudio is here. I find the explanation of the parameters in other functions, but still cannot understand them.

Can anyone explain it to me? An example of using it can be perfect.

did u chk? https://stackoverflow.com/questions/9468083/fading-sound-in-out-using-naudio — Daniel B, Feb 07 '18 at 21:34
@DanielB yes, I did. It is useless for me. The answer is about fade out in a period, which is using BeginFadeOut function. I want to fade out at any moment. — Jieke Wei, Feb 07 '18 at 22:09
@DanielB oh right, i get a new idea by your tip! Thanks, man! — Jieke Wei, Feb 07 '18 at 22:16
Put your solution as an answer if it is way different than the link I suggested — Daniel B, Feb 08 '18 at 04:53

score 0 · Answer 1 · answered Feb 08 '18 at 08:25

0

The answer is use beginfadeout method with period of 0

answered Feb 08 '18 at 08:25

Jieke Wei

173
2
13

How to use FadeOut function

1 Answers1