mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
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111 lines
4.5 KiB
PHP
111 lines
4.5 KiB
PHP
PipeWire's Pulseaudio emulation implements several Pulseaudio modules.
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It only supports its own built-in modules, and cannot load external
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modules written for Pulseaudio.
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# Loading modules
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The built-in modules can be loaded using Pulseaudio client programs,
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for example `pactl load-module <module-name> <module-options>`. They
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can also added to `pipewire-pulse.conf`, typically by a drop-in file
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in `~/.config/pipewire/pipewire-pulse.conf.d/` containing the module
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name and its arguments
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```
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pulse.cmd = [
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{ cmd = "load-module" args = "module-null-sink sink_name=foo" flags = [ ] }
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]
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```
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To list all modules currently loaded, with their arguments:
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```
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pactl list modules
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```
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For a short list of loaded modules:
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```
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pactl list modules short
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```
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Modules may be unloaded using either the module-name or index number:
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```
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pactl load-module <module-name> <parameters>
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pactl unload-module <module-name|index#>
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```
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# Common module options
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Most modules that create streams/devices support the following properties:
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## sink_name, source_name
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Name for the sink (resp. source). Allowed characters in the name are a-z, A-Z, numbers, period (.) and underscore (_). The length must be 1-128 characters.
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## format
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The sample format. The supported audio formats are:
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### PCM
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- u8: unsigned 8-bit integer
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- aLaw: A-law encoded 8-bit integer
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- uLaw: μ-law encoded 8-bit integer
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- s16le: signed 16-bit little-endian integer
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- s16be: signed 16-bit big-endian integer
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- s16, s16ne: native-endian aliases for s16le or s16be
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- s16re: reverse-endian alias for s16le or s16be
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- float32le: 32-bit little-endian float
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- float32be: 32-bit big-endian float
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- float32, float32ne: native-endian aliases for float32le or float32be
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- float32re: reverse-endian alias for float32le or float32be
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- s32le: signed 32-bit little-endian integer
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- s32be: signed 32-bit big-endian integer
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- s32, s32ne: native-endian aliases for s32le or s32be
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- s32re: reverse-endian alias for s32le or s32be
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- s24le: signed 24-bit little-endian integer (note: ALSA calls this "S24_3LE")
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- s24be: signed 24-bit big-endian integer (note: ALSA calls this "S24_3BE")
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- s24, s24ne: native-endian aliases for s24le or s24be
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- s24re: reverse-endian alias for s24le or s24be
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- s24-32le: signed 24-bit little-endian integer, packed into a 32-bit integer so that the 8 most significant bits are ignored (note: ALSA calls this "S24_LE")
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- s24-32be: signed 24-bit big-endian integer, packed into a 32-bit integer so that the 8 most significant bits are ignored (note: ALSA calls this "S24_BE")
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- s24-32, s24-32ne: native-endian aliases for s24-32le or s24-32be
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- s24-32re: reverse-endian alias for s24-32le or s24-32be
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### Compressed audio formats
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Below is a list of all supported compressed formats. The code at the beginning of each line is used whenever a textual identifier for a format is needed (for example in configuration files or on the command line). The formats whose identifier ends with -iec61937 have to be wrapped in IEC 61937 frames, which makes the compressed audio behave more like normal PCM audio.
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- ac3-iec61937: Dolby Digital (DD / AC-3 / A/52)
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- eac3-iec61937: Dolby Digital Plus (DD+ / E-AC-3)
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- mpeg-iec61937: MPEG-1 or MPEG-2 Part 3 (not MPEG-2 AAC)
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- dts-iec61937: DTS
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- mpeg2-aac-iec61937: MPEG-2 AAC (supported since PulseAudio 4.0)
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- truehd-iec61937: Dolby TrueHD (added in PulseAudio 13.0, but doesn't work yet in practice)
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- dtshd-iec61937: DTS-HD Master Audio (added in PulseAudio 13.0, but doesn't work yet in practice)
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- pcm: PCM (not a compressed format, but listed here, because pcm is one of the recognized encoding identifiers)
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- any: (special identifier for indicating that any encoding can be used)
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## rate
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The sample rate.
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##channels
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Number of audio channels.
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## channel_map
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A channel map. A list of comma-separated channel names. The currently defined channel names are:
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`left`, `right`, `mono`, `center`, `front-left`, `front-right`, `front-center`,
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`rear-center`, `rear-left`, `rear-right`, `lfe`, `subwoofer`, `front-left-of-center`,
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`front-right-of-center`, `side-left`, `side-right`, `aux0`, `aux1` to `aux15`, `top-center`,
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`top-front-left`, `top-front-right`, `top-front-center`, `top-rear-left`, `top-rear-right`,
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`top-rear-center`
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## sink_properties, source_properties
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Set additional properties of the sink/source. For example, you can set the description directly
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when the module is loaded by setting this parameter.
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```
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load-module module-alsa-sink sink_name=headphones sink_properties=device.description=Headphones
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```
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