mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-10-31 22:25:38 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

filter-graph: add a zeroramp plugin

Browse source 
The filter detects unnatural gaps (consisting of 0.0 values) and will
ramp-down or ramp-up the volume when entering/leaving those gaps.

This makes it filter out the pops and clicks you typically get when
pausing and resuming a stream.

See #4745
This commit is contained in:
Wim Taymans 2025-06-17 09:14:18 +02:00
parent 75b4c3379d
commit 0b2b723a0e
2 changed files with 116 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/modules/module-filter-chain.c
View file

@ -606,6 +606,24 @@ extern struct spa_handle_factory spa_filter_graph_factory;
* - `command` the command to execute. It should consume samples from stdin and produce
* samples on stdout.
*
* ### Zeroramp
*
* The `zeroramp` plugin can be used to detect unnatural silence parts in the audio
* stream and ramp the volume down or up when entering or leaving the silent area
* respectively.
* This can be used to avoid loud pops and clicks that occur when the sample values
* suddenly drop to zero or jump from zero to a large value caused by a pause,
* resume or an error of the stream. It only detect areas where the sample values
* are absolute zero values, such as those inserted when pausing a stream.
*
* It has an "In" input port and an "Out" output data ports.
*
* There are also "Gap (s)" and an "Duration (s)" input control ports. "Gap (s)"
* determines how long the silence gap is in seconds (default 0.000666) and
* "Duration (s)" determines how long the fade-in and fade-out should last
* (default 0.000666).
*
*
* ## SOFA filters
*
* There is an optional `sofa` type available (when compiled with `libmysofa`).