** Changed in: qtubuntu-media (Ubuntu)
Importance: Undecided => Wishlist
** Also affects: qtubuntu-media (Ubuntu RTM)
Importance: Undecided
Status: New
** Changed in: qtubuntu-media (Ubuntu RTM)
Importance: Undecided => Wishlist
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SDK bug tracking, which is subscribed to qtubuntu-media in Ubuntu.
https://bugs.launchpad.net/bugs/1384876
Title:
Playing from named pipe does not work
Status in qtubuntu-media package in Ubuntu:
New
Status in qtubuntu-media package in Ubuntu RTM:
New
Bug description:
There is no way to generate audio mathematically at runtime in QML and
play it directly through the AudioeEngine API. Instead, one must ship
a named pipe file in the click package, and use it as an audio sample
source. However, when using a named pipe as a sample, the AudioEngine
seems to read the data, but does not actually play it through the
speakers. The following QML code can be added to an application for
testing:
Label {
id: label
objectName: "label"
text: i18n.tr("Play Audio Pipe")
AudioEngine {
id: audioengine
AudioSample {
name: "audiopipe"
source: "audiopipe"
}
Sound {
name: "audiopipe"
PlayVariation {
sample: "audiopipe"
}
}
}
MouseArea {
anchors.fill: parent
onPressed: {
audioengine.sounds["audiopipe"].play();
}
}
}
Running the following commands and then clicking the "Play Audio Pipe"
button should result in the sound being heard through the speakers,
but apparently only results in the data being read and unblocking the
input which is writing to the pipe.
mkfifo audiopipe
cat foo.wav > audiopipe
The file 'foo.wav' can be any valid wav audio file.
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