WAVInterp16OneShotSourceFract32

Overview

Periodic one shot WAV playback with linear interpolation

Discussion

Module Pack

Advanced

ClassID

classID = 1353

Type Definition

typedef struct _ModuleWAVInterp16OneShotSourceFract32
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
FLOAT32 smoothingTime;                        // Time constant of the smoothing process
INT32 circularBufferSize;                     // Size of the upstream circular buffer, in 16-bit words.
INT32 extensionSize;                          // Size of the extension region of the circular buffer,  in 16-bit words
FLOAT32 currentFRatio;                        // Specifies rate at which audio is read from the input buffer
FLOAT32 smoothingCoeff;                       // Smoothing coefficient
INT32 fIndex;                                 // 32-bit fractional state index
INT32 psObjectID;                             // Object ID of the upstream PeriodicStreaming module
ModuleInstanceDescriptor ** psObjectPtr;      // Points to the upstream PeriodicStreaming module
void * pOwnerPtr;                             // Pointer to hold owner AWEInstance pointer
} ModuleWAVInterp16OneShotSourceFract32Class;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
smoothingTime	float	parameter	0	10	0:1000	msec
circularBufferSize	int	const	0	0	Unrestricted
extensionSize	int	parameter	0	0	Unrestricted
currentFRatio	float	parameter	1	1	Unrestricted
smoothingCoeff	float	derived	1	0.09516	Unrestricted
fIndex	int	state	1	0	Unrestricted
psObjectID	int	state	1	-1	Unrestricted
psObjectPtr	ModuleInstanceDescriptor **	state	1		Unrestricted
pOwnerPtr	void *	state	1		Unrestricted

Pins

Input Pins


Name	ptr
Description	Pointer to the streaming transfer object
Data type	int
Channel range	1
Block size range	1
Sample rate range	Unrestricted
Complex support	Real


Name	trigger
Description	Boolean trigger signal
Data type	int
Channel range	1
Block size range	1
Sample rate range	Unrestricted
Complex support	Real


Name	fRatio
Description	Specifies sample rate ratio
Data type	float
Channel range	1
Block size range	1
Sample rate range	Unrestricted
Complex support	Real

Output Pins


Name	out
Description	output data
Data Type	fract32

Matlab Usage

File Name: wav_interp16_oneshot_source_fract32_module.m 
 M=wav_interp16_oneshot_source_fract32_module(NAME, NUMCHANNELS, BLOCKSIZE, SAMPLERATE) 
 Creates a source module that connects to a streaming buffer module and outputs blocks 
 of data.  The function includes linear interpolation allowing playback to be slowed down and 
 speeded up.  This version uses 16-bit WAV data and a 32-bit fIndex register for efficient 
 implementation.  This version is a "one shot player" in which the playback is triggered  
 by an input pin and then stops after the WAV data has been played once.  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.