View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0007795 | ardour | bugs | public | 2019-08-24 13:51 | 2020-04-19 20:18 |
| Reporter | kjetil | Assigned To | x42 | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Platform | Windows 10 | OS | Windows | OS Version | 10 |
| Product Version | 5.12 | ||||
| Summary | 0007795: GUI freeze when changing parameters in the "a-High/Low pass Filter" plugin. | ||||
| Description | (see "Summary" and "Steps To Reproduce") | ||||
| Steps To Reproduce | 1. Start Ardour 5.12 2. Create an "a-High/Low-Pass Filter" plugin. 3. Open GUI for that plugin. 4. Make sure "Plugin analysis" is visible. 5. Move a slider rapidly back and forth. 6. After a few seconds (if your computer is slow enough), GUI starts freezing. | ||||
| Additional Information | Tested on windows and linux, two different graphic cards, two different CPUs. Looks like it takes a lot of time to draw graphics, and when changing slider values, it can take so much time to update the graphics (probably caused by a flood of events) that the GUI freezes. A workaround is to remove the line with "siz = lpf_chunk" from the function dsp_run. This does not happen in Ardour 5.6.0. (clone of issue https://tracker.ardour.org/view.php?id=7787) | ||||
| Tags | No tags attached. | ||||
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OK. So this seems to be because the GUI thread uses 100% CPU. - Since Ardour 5.6.0 the analysis was updated from 2048 to 8192 frames. The required CPU power for plugin analysis increased by about a factor of 4. - a-hp/lp filter interpolates parameter changes every 64 samples, by recalculating biquad coefficients (crappy textbook DSP). This is rather CPU expensive. |
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Possibly fixed in 6.0-pre0-2246-g9ce5184993 See https://github.com/Ardour/ardour/commit/3f19db4180903425d5807a7a31262c9769683c8f for an explanation |
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Fixed in Ardour 6.0-pre1 |
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Issue has been closed automatically, by Trigger Close Plugin. Feel free to re-open with additional information if you think the issue is not resolved. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2019-08-24 13:51 | kjetil | New Issue | |
| 2019-08-24 13:51 | kjetil | Issue generated from: 0007787 | |
| 2019-08-24 14:00 | x42 | Relationship added | duplicate of 0007787 |
| 2019-08-24 14:25 | x42 | Note Added: 0020752 | |
| 2019-08-24 15:14 | x42 | Assigned To | => x42 |
| 2019-08-24 15:14 | x42 | Status | new => feedback |
| 2019-08-24 15:14 | x42 | Note Added: 0020753 | |
| 2019-08-24 15:17 | x42 | Relationship replaced | has duplicate 0007787 |
| 2020-04-06 18:56 | x42 | Status | feedback => resolved |
| 2020-04-06 18:56 | x42 | Resolution | open => fixed |
| 2020-04-06 18:56 | x42 | Note Added: 0021219 | |
| 2020-04-19 20:18 | system | Note Added: 0023801 | |
| 2020-04-19 20:18 | system | Status | resolved => closed |
