(8.D.2.2 ) SetWireProperties
- Catherine Spain
Overview
Overrides wire properties
Discussion
The SetWireProperties modules is used to override wire information in an Audio Weaver layout. It is used rarely when you need to change the channel or sample count, or the real/complex properties of a wire. One common use case is to convert a wire with 1 channel and a blockSize of N to a wire with N channels and a blockSize of 1. At instantiation time (in Module Name and Arguments in Audio Weaver Designer), you specify the output blockSize, channel count, sample rate, data type, and real/complex properties of the output wire.
Internally, the module just performs a copy operation. A copy operation is required because the wire's pinType data structure has changed. When bypassed, the module continues to operate. That is, the module's bypass function is set to the module's process function.
The module's prebuild function checks to make sure that the number of samples in the output wire equals the number of samples in the input wire. If there is a mismatch in the number of samples then an error is thrown.
Type Definition
typedef struct _ModuleSetWireProperties
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
} ModuleSetWirePropertiesClass;Pins
Input Pins
Name: in
Description: Input signal
Data type: {float, int, fract32}
Channel range: Unrestricted
Block size range: Unrestricted
Sample rate range: Unrestricted
Complex support: Real and Complex
Output Pins
Name: out
Description: Output signal
Data type: float
MATLAB Usage
File Name: set_wire_properties_module.m
M = set_wire_properties_module(NAME, NUMCHANNELS, BLOCKSIZE, SAMPLERATE, DATATYPE, ISCOMPLEX)
Creates a module which overrides wire properties (number of channels, block size,
sample rate, and real/complex). This module is used in rare cases, for example,
when you need to convert from a block of data to multiple individual channels.
Note, the number of samples in the output wire have to match the number
of samples in the input wire. Arguments:
NAME - name of the module.
NUMCHANNELS - number of interleaved channels in each output pin.
By default, NUMCHANNELS=1;
BLOCKSIZE - number of samples per output channel. By default,
BLOCKSIZE=32.
SAMPLERATE - sample rate of the output signal in Hz. By default,
SAMPLERATE=48000.
DATATYPE - specifies the data type of the output pin. Possible values are:
1 = 'float', 2 = 'fract32', 3 = 'int'. By default, DATATYPE = 1.
ISCOMPLEX - Boolean indicating whether the output holds complex data.
By default, ISCOMPLEX=0.Â