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I didn't get this buffer delay calculation in android HAL.

bufDelay = (long)(((int64_t)(mInputFramesIn + mProcFramesIn) * 1000000000)
                                / AUDIO_HW_IN_SAMPLERATE);

I didn't understand why they are subtracting (mInputFramesIn + mProcFramesIn) with AUDIO_HW_IN_SAMPLERATE (i think the value of this macro will be 44,100).can anyone help me in this.

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