River configuration file

Table of Contents

• Objectifs:
• Basis:
• Harware configuration:

Objectifs:

• Understand the architecture of the configuration file.
• all that can be done with it.

Basis:

The river configuration file is a json file. We use What is EJSON: to parse it then we have some writing facilities.

River provide a list a harware interface and virtual interface.

The hardware interface are provided by What is AUDIO-ORCHESTRA: then we will plug on every platform.

The file is simply architecture around a list of object:

{
    "speaker":{

    },
    "microphone":{

    },
    "mixed-in-out":{

    },
}

With this config we declare 3 interfaces : speaker, microphone and mixed-in-out.

Harware configuration:

In every interface we need to define some Element:

• "io" : Can be input/output/... depending of virtual interface...
• "map-on": An object to configure airtaudio interface.
• "frequency": 0 to automatic select one. Or the frequency to open harware device
• "channel-map": List of all channel in the stream:
  • "front-left"
  • "front-center"
  • "front-right"
  • "rear-left"
  • "rear-center"
  • "rear-right"
  • "surround-left",
  • "surround-right",
  • "sub-woofer",
  • "lfe"
• "type": Fomat to open the stream:
  • "auto": Detect the best type
  • "int8",
  • "int8-on-int16",
  • "int16",
  • "int16-on-int32",
  • "int24",
  • "int32",
  • "int32-on-int64",
  • "int64",
  • "float",
  • "double"
• "nb-chunk": Number of chunk to open the stream.