[vlc-devel] [PATCHv2 2/9] aout: add the vlc_audio_meter API

[Steve Lhomme]

On 2020-08-19 21:25, Thomas Guillem wrote:
> This API will be used by the aout, and could be used by any visualisation
> module needing audio measurements.
> 
> This API allows to create "audio meter" filters plugins. This new type of
> filter is measuring audio blocks without modifying them and send the
> measurement via audio filters callbacks. These events are then propagated to
> vlc_audio_meter events.

This doesn't sound very accurate. For example if you pause and play you 
get a value from blocks that will play in many ms ? I would prefer if 
the meter value could be attached to the block or at least sent as a 
timed stream (a new ES type ?). It could be turned to SPU accurately if 
you want to display them. That makes visualization totally independent 
of the metering algorithm.