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Per track meters #5861

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@Paul-Licameli Paul-Licameli commented Jan 12, 2024

Resolves: (direct link to the issue)

(short description of the changes and the motivation to make the changes)

  • I signed CLA
  • The title of the pull request describes an issue it addresses
  • If changes are extensive, then there is a sequence of easily reviewable commits
  • Each commit's message describes its purpose and effects
  • There are no behavior changes unnecessary for the stated purpose of the PR

Recommended:

  • Each commit compiles and runs on my machine without known undesirable changes of behavior

@Paul-Licameli Paul-Licameli added the Experimental Exploratory, proof-of-concept PRs, never to me merged label Jan 12, 2024
@Paul-Licameli Paul-Licameli self-assigned this Jan 12, 2024
@petersampsonaudacity
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petersampsonaudacity commented Jan 12, 2024

@Paul-Licameli

I just tested on W10 your branch: audacity-win-3.5.0-alpha-20240112+5d1bafd-x64

The per track meters seem to work properly.

One thing to note: just like the main meters these per track meters can only be reset by stopping and restarting:

See: #5658
No longer possible to reset the Maximum Peak and Clipping indicators in the meters #5658

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petersampsonaudacity commented Jan 12, 2024

@Paul-Licameli

The per track meters do not work while recording:
image

... The real work happens only in AILAProcess which is still not called without
the experimental flag turned on.
... see also f509d9c where GetMaxPeak became unused
... also consistency of signatures with the pure virtuals of MeterPanelBase
... Don't emit start events until success is known.

Only ProjectAudioManager cared, and anyway ignored start events.
... Control areas are narrower, for WaveTrack.  For other kinds of tracks,
which don't have meters, the control areas are now wider.
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