Arduino STK
4.6.2
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STK looping / oscillator class using a simple memory array as input. More...
#include <MemoryLoop.h>
Public Member Functions | |
MemoryLoop (unsigned long chunkSize=256) | |
Default constructor. | |
MemoryLoop (const char *fileName, const unsigned char *data, size_t size, unsigned long chunkSize=256) | |
Class constructor that opens a specified file. | |
MemoryLoop (const char *fileName, unsigned long chunkSize=256) | |
Class constructor that opens a specified file. The file must have been registered. | |
MemoryLoop (MemoryFS *data, unsigned long chunkSize=256) | |
Class constructor that uses a MemoryFS. | |
~MemoryLoop (void) | |
Class destructor. | |
virtual void | openFile (std::string fileName, bool raw=true, bool doNormalize=true, bool doInt2FloatScaling=true) |
Open the specified file and load its data. More... | |
virtual void | openFile (const char *fileName, bool raw=true, bool doNormalize=true, bool doInt2FloatScaling=true) |
Open the specified file and load its data. More... | |
void | addPhaseOffset (StkFloat angle) |
Add a phase offset to the current read pointer. More... | |
void | closeFile (void) |
Close the actual file. More... | |
bool | isOpen (void) |
Query whether a file is open. More... | |
StkFloat | getFileRate (void) |
Return the input file sample rate in Hz (not the data read rate). More... | |
virtual void | reset (void) |
Clear outputs and reset time (file) pointer to zero. | |
unsigned int | channelsOut (void) const |
Return the number of audio channels in the data or stream. | |
void | normalize (void) |
Normalize data to a maximum of +-1.0. More... | |
void | normalize (StkFloat peak) |
Normalize data to a maximum of +-peak. More... | |
unsigned long | getSize (void) const |
Return the file size in sample frames. | |
StkFloat | getFileRate (void) const |
Return the input file sample rate in Hz (not the data read rate). More... | |
void | setRate (StkFloat rate) |
Set the data read rate in samples. The rate can be negative. More... | |
void | setFrequency (StkFloat frequency) |
Set the data interpolation rate based on a looping frequency. More... | |
void | addTime (StkFloat time) |
Increment the read pointer by time samples, modulo file size. | |
void | addPhase (StkFloat angle) |
Increment current read pointer by angle, relative to a looping frequency. More... | |
StkFloat | lastOut (unsigned int channel=0) |
Return the specified channel value of the last computed frame. More... | |
StkFloat | tick (unsigned int channel=0) |
Compute a sample frame and return the specified channel value. More... | |
virtual StkFrames & | tick (StkFrames &frames, unsigned int channel=0) |
Fill the StkFrames object with computed sample frames, starting at the specified channel and return the same reference. More... | |
Protected Member Functions | |
virtual bool | isFinished (void) const |
Query whether reading is complete. | |
void | setInterpolate (bool doInterpolate) |
Turn linear interpolation on/off. More... | |
const StkFrames & | lastFrame (void) const |
Return an StkFrames reference to the last computed sample frame. More... | |
void | ignoreSampleRateChange (bool ignore=true) |
A function to enable/disable the automatic updating of class data when the STK sample rate changes. More... | |
void | handleError (StkError::Type type) const |
Internal function for error reporting that assumes message in oStream_ variable. | |
void | addSampleRateAlert (Stk *ptr) |
Add class pointer to list for sample rate change notification. | |
void | removeSampleRateAlert (Stk *ptr) |
Remove class pointer from list for sample rate change notification. | |
Static Protected Member Functions | |
static StkFloat | sampleRate (void) |
Static method that returns the current STK sample rate. | |
static void | setSampleRate (StkFloat rate) |
Static method that sets the STK sample rate. More... | |
static void | clear_alertList () |
Static method that frees memory from alertList_. | |
static std::string | rawwavePath (void) |
Static method that returns the current rawwave path. | |
static void | setRawwavePath (std::string path) |
Static method that sets the STK rawwave path. | |
static void | swap16 (unsigned char *ptr) |
Static method that byte-swaps a 16-bit data type. | |
static void | swap32 (unsigned char *ptr) |
Static method that byte-swaps a 32-bit data type. | |
static void | swap64 (unsigned char *ptr) |
Static method that byte-swaps a 64-bit data type. | |
static void | sleep (unsigned long milliseconds) |
Static cross-platform method to sleep for a number of milliseconds. | |
static bool | inRange (StkFloat value, StkFloat min, StkFloat max) |
Static method to check whether a value is within a specified range. | |
static void | handleError (const char *message, StkError::Type type) |
Static function for error reporting and handling using c-strings. | |
static void | handleError (std::string message, StkError::Type type) |
Static function for error reporting and handling using c++ strings. | |
static void | showWarnings (bool status) |
Toggle display of WARNING and STATUS messages. | |
static void | printErrors (bool status) |
Toggle display of error messages before throwing exceptions. | |
Static Protected Attributes | |
static const StkFormat | STK_SINT8 |
static const StkFormat | STK_SINT16 |
static const StkFormat | STK_SINT24 |
static const StkFormat | STK_SINT32 |
static const StkFormat | STK_FLOAT32 |
static const StkFormat | STK_FLOAT64 |
STK looping / oscillator class using a simple memory array as input.
A 'virtual' file can be registered so that a fileOpen call with a file name is working like in the corresponding FileWvIn class
This is basically a simplified version of the FileLoop
Phil Schatzmann
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virtual |
Open the specified file and load its data.
This method is provided to be compatible with the FileWvIn
Reimplemented from stk::FileLoop.
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virtual |
Open the specified file and load its data.
This method is provided to be compatible with the FileWvIn
void stk::MemoryLoop::addPhaseOffset | ( | StkFloat | angle | ) |
Add a phase offset to the current read pointer.
This function determines a time offset based on the file size and the current Stk::sampleRate. The angle value is a multiple of file size.
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virtual |
Close the actual file.
This method is provided to be compatible with the FileWvIn
Reimplemented from stk::FileLoop.
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virtual |
Query whether a file is open.
This does not have any importance since the data is available in the memory anyhow.
Reimplemented from stk::FileWvIn.
StkFloat stk::MemoryLoop::getFileRate | ( | void | ) |
Return the input file sample rate in Hz (not the data read rate).
STK RAW files have a sample rate of 22050 Hz
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inlinevirtualinherited |
Normalize data to a maximum of +-1.0.
This function has no effect when data is incrementally loaded from disk.
Reimplemented from stk::FileWvIn.
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inlinevirtualinherited |
Normalize data to a maximum of +-peak.
This function has no effect when data is incrementally loaded from disk.
Reimplemented from stk::FileWvIn.
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inlinevirtualinherited |
Return the input file sample rate in Hz (not the data read rate).
WAV, SND, and AIF formatted files specify a sample rate in their headers. STK RAW files have a sample rate of 22050 Hz by definition. MAT-files are assumed to have a rate of 44100 Hz.
Reimplemented from stk::FileWvIn.
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virtualinherited |
Set the data read rate in samples. The rate can be negative.
If the rate value is negative, the data is read in reverse order.
Reimplemented from stk::FileWvIn.
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inlineinherited |
Set the data interpolation rate based on a looping frequency.
This function determines the interpolation rate based on the file size and the current Stk::sampleRate. The frequency value corresponds to file cycles per second. The frequency can be negative, in which case the loop is read in reverse order.
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inherited |
Increment current read pointer by angle, relative to a looping frequency.
This function increments the read pointer based on the file size and the current Stk::sampleRate. The anAngle value is a multiple of file size.
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inlineinherited |
Return the specified channel value of the last computed frame.
For multi-channel files, use the lastFrame() function to get all values from the last computed frame. If no file data is loaded, the returned value is 0.0. The channel
argument must be less than the number of channels in the file data (the first channel is specified by 0). However, range checking is only performed if STK_DEBUG is defined during compilation, in which case an out-of-range value will trigger an StkError exception.
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virtualinherited |
Compute a sample frame and return the specified channel
value.
For multi-channel files, use the lastFrame() function to get all values from the computed frame. If no file data is loaded, the returned value is 0.0. The channel
argument must be less than the number of channels in the file data (the first channel is specified by 0). However, range checking is only performed if STK_DEBUG is defined during compilation, in which case an out-of-range value will trigger an StkError exception.
Reimplemented from stk::FileWvIn.
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virtualinherited |
Fill the StkFrames object with computed sample frames, starting at the specified channel and return the same reference.
The channel
argument plus the number of output channels must be less than the number of channels in the StkFrames argument (the first channel is specified by 0). However, range checking is only performed if STK_DEBUG is defined during compilation, in which case an out-of-range value will trigger an StkError exception.
Reimplemented from stk::FileWvIn.
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inlineinherited |
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inlineinherited |
Return an StkFrames reference to the last computed sample frame.
If no file data is loaded, an empty container is returned.
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staticinherited |
Static method that sets the STK sample rate.
The sample rate set using this method is queried by all STK classes that depend on its value. It is initialized to the default SRATE set in Stk.h. Many STK classes use the sample rate during instantiation. Therefore, if you wish to use a rate that is different from the default rate, it is imperative that it be set BEFORE STK objects are instantiated. A few classes that make use of the global STK sample rate are automatically notified when the rate changes so that internal class data can be appropriately updated. However, this has not been fully implemented. Specifically, classes that appropriately update their own data when either a setFrequency() or noteOn() function is called do not currently receive the automatic notification of rate change. If the user wants a specific class instance to ignore such notifications, perhaps in a multi-rate context, the function Stk::ignoreSampleRateChange() should be called.
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inlineinherited |
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staticinherited |
-128 to +127
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staticinherited |
-32768 to +32767
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staticinherited |
Lower 3 bytes of 32-bit signed integer.
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staticinherited |
-2147483648 to +2147483647.
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staticinherited |
Normalized between plus/minus 1.0.
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staticinherited |
Normalized between plus/minus 1.0.