HalAudioSrc allows access to input of sound devices by specifying the corresponding persistent Unique Device Id (UDI) from the Hardware Abstraction Layer (HAL) in the udi property. It currently always embeds alsasrc or osssrc as HAL doesn't support other sound systems yet. You can also specify the UDI of a device that has ALSA or OSS subdevices. If both are present ALSA is preferred.

Examples

To list the UDIs of all your ALSA input devices :

hal-find-by-property --key alsa.type --string capture

Here is a pipeline to test your sound input :

gst-launch -v halaudiosrc udi=/org/freedesktop/Hal/devices/pci_8086_27d8_alsa_capture_0 ! autoaudiosink

You should now hear yourself with a small delay if you have a microphone connected to the specified sound device.

Element Information

GstHalAudioSrc

typedef struct _GstHalAudioSrc GstHalAudioSrc;

The "udi" property

  "udi"                      gchararray            : Read / Write

Unique Device Id.

Default value: NULL