AOAudioPlaybackAdaptor() -> new AOAudioPlaybackAdaptor
Expects to recieve data from standard inbox, and plays it using
libao. When it recieves a message on the control port: Sends a
producerConsumed to its outbox. Then shutsdown.
Requires libao and pyao (python bindings)
Example
A simple player:
Pipeline(
ReadFileAdaptor("somefile.ogg"),
VorbisDecode(),
AOAudioPlaybackAdaptor(),
).run()
Inboxes
- control : If a message is received here, the
component shutsdown
- inbox : Any raw PCM encoded data recieved here is
played through the default oss playback device
Outboxes
- outbox : UNUSED
- signal : When the component shutsdown, it sends a
producerFinished message out this outbox
Methods defined here
Warning!
You should be using the inbox/outbox interface, not these methods
(except construction). This documentation is designed as a roadmap as to
their functionalilty for maintainers and new component developers.
__init__(self)
x.__init__(...) initializes x; see x.__class__.__doc__ for
signature
main(self)
Performs the logic described above
VorbisDecode() -> new VorbisDecoder
A Vorbis decoder accepts data on its inbox "inbox", as would be read
from an ogg vorbis file, decodes it and sends on the decompressed data
on out of its outbox "outbox". It doesn't provide any further
information at this stage, such as bitrate, or any other frills.
Requires libvorbissimple and python bindings (see
kamaelia downloads)
Example
A simple player:
Pipeline(
ReadFileAdaptor("somefile.ogg"),
VorbisDecode(),
AOAudioPlaybackAdaptor(),
).run()
This component expects to recieve OGG VORBIS data as you would get
from a .ogg file containing vorbis data. (rather than raw vorbis
data)
Inboxes
- control : Receiving a message here causes component
shutdown
- inbox : Ogg wrapped vorbis data
Outboxes
- outbox : As data is decompresessed it is sent to
this outbox
- signal : When the component shuts down, it sends on
a producerFinished message
Methods defined here
Warning!
You should be using the inbox/outbox interface, not these methods
(except construction). This documentation is designed as a roadmap as to
their functionalilty for maintainers and new component developers.
__init__(self)
x.__init__(...) initializes x; see x.__class__.__doc__ for
signature
main(self)
This contains no user serviceable parts :-)
Theory of operation is simple. It simply repeatedly asks the decoder
object for audio. That decoded audio is sent to the component's outbox.
If the decoder object responds with RETRY, the component retries. If the
decoder object responds with NEEDDATA, the component waits for data on
any inbox until some is available (from an inbox)
