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Technical Documentation “Instreamer “ - V4.03 - 24th October 2013

3 General Interfaces

New in V3.15 are the Binary Discovery Protocol and support for GPIs. See Wikipedia description of GPIO.

3.1 Binary Discovery

The main purpose of the Binary Discovery Protocol is to enable Barix devices to be more easily found on a local LAN.

UDP packets are accepted on port 30718. Two commands are supported

–GET to obtain a limited amount of information from the device.

–SET to write information to the device typically an IP address.

A Java PC program which supports this protocol is available on the Barix web site.

A Barix Technical Note describing the Binary Discovery Protocol is available on request.

3.2 General Purpose Inputs (GPIs)

From version 3.15 of the Instreamer up to 8 General Purpose Inputs are supported. The exact number supported depends on the HW used .

The first intended use of this feature is on the Exstreamer 1000 which has 4 GPIs. The Inputs are used either to trigger streaming or to send contact

closures to a partner Exstreamer1000 which has SW loaded capable of decoding the information (e.g. Streaming Client V2.10 or later). Use of the

GPIs is configurable via the WEB UI and this is also described in the Instreamer Manual for V3.15.

3.3 GPI transport

If configured, contact closures are sent in a Shoutcast HTTP or RTP audio stream. For Shoucast up to 4 GPIs are supported, for RTP up to 8.

Shoutcast encoding

The following meta tag is inserted into the stream: StreamUrl='<GPI character>'.

Where <GPI character> = A + a bit map of the 4 inputs.

Example: Let's assume all 4 inputs are set so that <GPI character> = A+15 =P

This would give: StreamUrl='P'

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BARIX Instreamer Manual de usuario Pagina 34