BufferDown

Overview

Buffers the input into smaller block sizes. Non-overlapping

Discussion

This module is the interface between large block processing and small block processing. The module breaks up large blocks of data into smaller blocks. The larger blocks are executed in a lower priority thread compared to the smaller blocks. The module works on any 32-bit data type including integer, fract32, and floating-point.

The argument OUTBLOCKSIZE determines the blockSize of the output pin. If OUTBLOCKSIZE is positive, then the output blockSize equals OUTBLOCKSIZE. If OUTBLOCKSIZE is negative, then the output blockSize equals the input blockSize divided by (-OUTBLOCKSIZE).

When the module is Bypassed, it behaves same as Active. i.e. module process function is called even when the module is bypassed, to make sure corresponding FiFoIn and FiFoOut module are in sync.

Note, not all targets support this. Check the target documentation to see how many levels of audio processing are supported.

Module Pack

Advanced

ClassID

classID =

Type Definition

typedef struct _ModuleBufferDown
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
} ModuleBufferDownClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
outBlockSize	int	const	0	-1	Unrestricted

Pins

Input Pins


Name	in
Description	audio input
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	audio output
Data Type	{float, int, fract32}

Matlab Usage

File Name: buffer_down_subsystem.m 
 SYS=buffer_down_subsystem(NAME, OUTBLOCKSIZE) 
 Create a module which buffers data into a smaller block size.  The buffering 
 is non-overlapping and the downstream processing occurs at a higher block  
 rate.  Arguments: 
    NAME - name of the module. 
    OUTBLOCKSIZE - specifies the blockSize of the output pin.  If 
        OUTBLOCKSIZE is positive, then the output blockSize equals 
        OUTBLOCKSIZE.  If OUTBLOCKSIZE is negative, then the output blockSize 
        equals the input blockSize times (-OUTBLOCKSIZE).