[alsa-devel] first and last audio sample timestamp

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Hi All,

Hello all,

I’m using aplay and arecord utilities for playback and capture. I need to capture the timestamps for the first and last audio samples that arrive at the driver level.

For this I’m capturing the CLOCK_MONOTONIC_RAW timestamp at the .trigger(for playback & capture) callback in SNDRV_PCM_TRIGGER_START case – is it the correct timestamp for the first audio sample arrived at the driver level?

Similarly does .trigger callbacks SNDRV_PCM_TRIGGER_STOP gives the last audio sample timestamp?