LossFunction

Enumerations | Functions

LossFunction

Enumerations
enum	miopenCTCLossAlgo_t { MIOPEN_CTC_LOSS_ALGO_DETERMINISTIC = 0 }

Functions
	MIOPEN_DECLARE_OBJECT (miopenCTCLossDescriptor)
	Creates the miopenCTCLossDescriptor_t type. More...
miopenStatus_t	miopenCreateCTCLossDescriptor (miopenCTCLossDescriptor_t *ctcLossDesc)
	Create a CTC loss function Descriptor. More...
miopenStatus_t	miopenGetCTCLossDescriptor (miopenCTCLossDescriptor_t ctcLossDesc, miopenDataType_t *dataType, int *blank_label_id, bool *apply_softmax_layer)
	Retrieves a CTC loss function descriptor's details. More...
miopenStatus_t	miopenDestroyCTCLossDescriptor (miopenCTCLossDescriptor_t ctcLossDesc)
	Destroys a CTC loss function descriptor object. More...
miopenStatus_t	miopenSetCTCLossDescriptor (miopenCTCLossDescriptor_t ctcLossDesc, miopenDataType_t dataType, const int blank_label_id, bool apply_softmax_layer)
	Set the details of a CTC loss function descriptor. More...
miopenStatus_t	miopenGetCTCLossWorkspaceSize (miopenHandle_t handle, const miopenTensorDescriptor_t probsDesc, const miopenTensorDescriptor_t gradientsDesc, const int *labels, const int *labelLengths, const int *inputLengths, miopenCTCLossAlgo_t algo, const miopenCTCLossDescriptor_t ctcLossDesc, size_t *workSpaceSize)
	Query the amount of memory required to execute miopenCTCLoss. More...
miopenStatus_t	miopenCTCLoss (miopenHandle_t handle, const miopenTensorDescriptor_t probsDesc, const void *probs, const int *labels, const int *labelLengths, const int *inputLengths, void *losses, const miopenTensorDescriptor_t gradientsDesc, void *gradients, miopenCTCLossAlgo_t algo, const miopenCTCLossDescriptor_t ctcLossDesc, void *workSpace, size_t workSpaceSize)
	Execute forward inference for CTCLoss layer. More...

Detailed Description

Enumeration Type Documentation

◆ miopenCTCLossAlgo_t

enum miopenCTCLossAlgo_t

Algorithms available to execute the CTC loss operation

Enumerator
MIOPEN_CTC_LOSS_ALGO_DETERMINISTIC	Results are guaranteed to be reproducible

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

Function Documentation

◆ MIOPEN_DECLARE_OBJECT()

MIOPEN_DECLARE_OBJECT

(

miopenCTCLossDescriptor

)

Creates the miopenCTCLossDescriptor_t type.

◆ miopenCreateCTCLossDescriptor()

miopenStatus_t miopenCreateCTCLossDescriptor

(

miopenCTCLossDescriptor_t *

ctcLossDesc

)

Create a CTC loss function Descriptor.

API for creating an uninitialized CTC loss function descriptor.

Parameters

ctcLossDesc

Pointer to the CTC loss function descriptor type (output)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenCTCLoss()

miopenStatus_t miopenCTCLoss	(	miopenHandle_t	handle,
		const miopenTensorDescriptor_t	probsDesc,
		const void *	probs,
		const int *	labels,
		const int *	labelLengths,
		const int *	inputLengths,
		void *	losses,
		const miopenTensorDescriptor_t	gradientsDesc,
		void *	gradients,
		miopenCTCLossAlgo_t	algo,
		const miopenCTCLossDescriptor_t	ctcLossDesc,
		void *	workSpace,
		size_t	workSpaceSize
	)

Execute forward inference for CTCLoss layer.

Interface for executing the forward inference pass on a CTCLoss.

Parameters

handle	MIOpen handle (input)
probsDesc	Tensor descriptor for probabilities (input)
probs	Pointer to the probabilities tensor (input)
labels	Pointer to the flattened labels list (input)
labelLengths	Pointer to the lengths list for "labels" (input)
inputLengths	Pointer to the list of the time steps in each batch (input)
losses	Pointer to the computed losses of CTC (Output)
gradientsDesc	Tensor descriptor for gradients (input)
gradients	Pointer to the computed gradients of CTC (Output)
algo	CTC loss algorithm selected (input)
ctcLossDesc	CTC loss function descriptor type (input)
workSpace	Pointer to memory allocated for execute CTC loss operation (input)
workSpaceSize	Number of bytes of workspace required for CTC loss operation with selected algorithm (input)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenDestroyCTCLossDescriptor()

miopenStatus_t miopenDestroyCTCLossDescriptor

(

miopenCTCLossDescriptor_t

ctcLossDesc

)

Destroys a CTC loss function descriptor object.

Parameters

ctcLossDesc

CTC loss function descriptor type (input)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenGetCTCLossDescriptor()

miopenStatus_t miopenGetCTCLossDescriptor	(	miopenCTCLossDescriptor_t	ctcLossDesc,
		miopenDataType_t *	dataType,
		int *	blank_label_id,
		bool *	apply_softmax_layer
	)

Retrieves a CTC loss function descriptor's details.

Parameters

ctcLossDesc	CTC loss function descriptor (input)
dataType	Data type used in this CTC loss operation, only fp32 currently supported (output)
blank_label_id	User defined index for blank label (output)
apply_softmax_layer	Boolean to toggle input layer property (output)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenGetCTCLossWorkspaceSize()

miopenStatus_t miopenGetCTCLossWorkspaceSize	(	miopenHandle_t	handle,
		const miopenTensorDescriptor_t	probsDesc,
		const miopenTensorDescriptor_t	gradientsDesc,
		const int *	labels,
		const int *	labelLengths,
		const int *	inputLengths,
		miopenCTCLossAlgo_t	algo,
		const miopenCTCLossDescriptor_t	ctcLossDesc,
		size_t *	workSpaceSize
	)

Query the amount of memory required to execute miopenCTCLoss.

This function calculates the amount of memory required to run the CTC loss function given a CTC loss function descriptor with the specified algorithm.

Parameters

handle	MIOpen handle (input)
probsDesc	Tensor descriptor for probabilities (input)
gradientsDesc	Tensor descriptor for gradients (input)
labels	Pointer to the flattened labels list (input)
labelLengths	Pointer to the lengths list for "labels" (input)
inputLengths	Pointer to the list of the time steps in each batch (input)
algo	CTC loss algorithm selected (input)
ctcLossDesc	CTC loss function descriptor type (input)
workSpaceSize	Number of bytes of workspace required for CTC loss operation with selected algorithm (output)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenSetCTCLossDescriptor()

miopenStatus_t miopenSetCTCLossDescriptor	(	miopenCTCLossDescriptor_t	ctcLossDesc,
		miopenDataType_t	dataType,
		const int	blank_label_id,
		bool	apply_softmax_layer
	)

Set the details of a CTC loss function descriptor.

Parameters

ctcLossDesc	CTC loss function descriptor type (input)
dataType	Data type used in this CTC loss operation, only fp32 currently supported (input)
blank_label_id	User defined index for blank label, default 0 (input)
apply_softmax_layer	Boolean to toggle input layer property (input)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.