DelayReader

Overview

Reads the data from a delay_state_writer_module with a given delay

Discussion

This module reads the data from a delay_state_writer module. The input is a single channel, single block, integer, which is the output from a delay_state_writer module. The output has the same number of channels, blocksize, and sample rate as the input to the delay_state_writer module. The currentDelay value is how much to delay the samples that are stored in the delay_state_writer module. This can be a non-integer value, in which case interpolation is applied to the samples. 2 types of interpolations are possible - linear or cubic. Limitations of this module is that it has to be on the same hierarchy as the delay state writer module and that it has to be directly connected to the delay_state_writer module with nothing (except markers) in between.

Type Definition

CODE

typedef struct _ModuleDelayReader
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    INT32 maxDelay;                               // Max Delay of the writer module (per channel)
    FLOAT32 currentDelay;                         // Current delay
    INT32 interpolationType;                      // Interpolation type - linear, cubic, etc
    INT32 dswObjectID;                            // Object ID of the upstream DelayStateWriter module
    void * dswObjectPtr;                          // Points to the upstream DelayStateWriter module
    INT32 * dataType;                             // Internal state variable to hold data type
} ModuleDelayReaderClass;

Variables

Properties

Name	Type	Usage	isHidden	Default value	Range	Units
maxDelay	int	const	0	100	Unrestricted	samples
currentDelay	float	parameter	0	0	0:100	samples
interpolationType	int	parameter	0	0	0:1
dswObjectID	int	state	1	-1	Unrestricted
dswObjectPtr	void *	state	1		Unrestricted
dataType	INT32 *	state	1		Unrestricted

Pins

Input Pins

Name: ID

Description: audio input

Data type: int

Channel range: 1

Block size range: 1

Sample rate range: Unrestricted

Complex support: Real

Output Pins

Name: out

Description: audio output

Data type: float

MATLAB Usage

File Name: delay_reader_module.m

CODE

 M=delay_reader_module(NAME, NUMCHANNELS, BLOCKSIZE, SAMPLERATE, DATATYPE, ISCOMPLEX)
 Creates a delay reader module. Delay reader module reads the samples 
 stored in a delay_state_writer module that is the input to this module. 
 Supports using linear interpolation or cubic interpolation for 
 non-integer delay. 
 Arguments:
   NAME - name of the module.
 Limitations - this module must be connected to a DelayStateWriter module.
 There cannot be anything except markers between these 2 modules. The
 modules must be on the same subsystem hierarchy.