Overview
Continuously outputs a buffer of fract32 data
Discussion
This module continuously outputs a stored buffer of fract32 data. The module starts with the first sample and continues to the end of the array. Once the end of the array is reached, the module wraps to the beginning of the buffer. Thus, the data values are circularly addressed. The modules supports an internal buffer size which can be different from the block size of the module. The module also supports an arbitrary number of output channels.
Type Definition
typedef struct _ModulePeriodicSourceFract32
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
INT32 L; // Number of (multi-channel) samples in the internal buffer.
INT32 numChannels; // Number of channels in the output. This is only needed for the MATLAB simulation.
INT32 blockSize; // Output blockSize. This is only needed for the MATLAB simulation.
INT32 stateIndex; // Index of the next data sample to output. This circularly wraps
fract32* value; // Output data array
} ModulePeriodicSourceFract32Class;
Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
L | int | const | 0 | 32 | Unrestricted | |
numChannels | int | const | 1 | 1 | Unrestricted | |
blockSize | int | const | 1 | 16 | Unrestricted | |
stateIndex | int | state | 1 | 0 | Unrestricted | |
value | fract32* | parameter | 0 | [32 x 1] | Unrestricted |
Pins
Output Pins
Name: out
Description: audio output
Data type: fract32
MATLAB Usage
File Name: periodic_source_fract32_module.m
M=periodic_source_fract32_module(NAME, L, NUMCHANNELS, BLOCKSIZE, SAMPLERATE)
Create a module which generates a periodic signal by repetitively
outputing a buffer of data. This version works with fract32 data. Arguments:
NAME - name of the module.
L - length of the repetition which equals the number of
samples in the buffer.
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.