You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
421 lines
12 KiB
421 lines
12 KiB
//==============================================================================
|
|
//
|
|
// Copyright (c) 2017-2020 Qualcomm Technologies, Inc.
|
|
// All Rights Reserved.
|
|
// Confidential and Proprietary - Qualcomm Technologies, Inc.
|
|
//
|
|
//==============================================================================
|
|
|
|
#ifndef _IUSER_BUFFER_HPP
|
|
#define _IUSER_BUFFER_HPP
|
|
|
|
#include "TensorShape.hpp"
|
|
#include "ZdlExportDefine.hpp"
|
|
#include <math.h>
|
|
|
|
namespace zdl {
|
|
namespace DlSystem {
|
|
|
|
/** @addtogroup c_plus_plus_apis C++
|
|
@{ */
|
|
|
|
|
|
/**
|
|
* @brief .
|
|
*
|
|
* A base class buffer encoding type
|
|
*/
|
|
class ZDL_EXPORT UserBufferEncoding {
|
|
public:
|
|
|
|
/**
|
|
* @brief .
|
|
*
|
|
* An enum class of all supported element types in a IUserBuffer
|
|
*/
|
|
enum class ElementType_t
|
|
{
|
|
/// Unknown element type.
|
|
UNKNOWN = 0,
|
|
|
|
/// Each element is presented by float.
|
|
FLOAT = 1,
|
|
|
|
/// Each element is presented by an unsigned int.
|
|
UNSIGNED8BIT = 2,
|
|
|
|
/// Each element is presented by an 8-bit quantized value.
|
|
TF8 = 10,
|
|
|
|
/// Each element is presented by an 16-bit quantized value.
|
|
TF16 = 11
|
|
};
|
|
|
|
/**
|
|
* @brief Retrieves the size of the element, in bytes.
|
|
*
|
|
* @return Size of the element, in bytes.
|
|
*/
|
|
virtual size_t getElementSize() const noexcept = 0;
|
|
|
|
/**
|
|
* @brief Retrieves the element type
|
|
*
|
|
* @return Element type
|
|
*/
|
|
ElementType_t getElementType() const noexcept {return m_ElementType;};
|
|
|
|
virtual ~UserBufferEncoding() {}
|
|
|
|
protected:
|
|
UserBufferEncoding(ElementType_t elementType) : m_ElementType(elementType) {};
|
|
private:
|
|
const ElementType_t m_ElementType;
|
|
};
|
|
|
|
/**
|
|
* @brief .
|
|
*
|
|
* A base class buffer source type
|
|
*
|
|
* @note User buffer from CPU support all kinds of runtimes;
|
|
* User buffer from GLBUFFER support only GPU runtime.
|
|
*/
|
|
class ZDL_EXPORT UserBufferSource {
|
|
public:
|
|
enum class SourceType_t
|
|
{
|
|
/// Unknown buffer source type.
|
|
UNKNOWN = 0,
|
|
|
|
/// The network inputs are from CPU buffer.
|
|
CPU = 1,
|
|
|
|
/// The network inputs are from OpenGL buffer.
|
|
GLBUFFER = 2
|
|
};
|
|
|
|
/**
|
|
* @brief Retrieves the source type
|
|
*
|
|
* @return Source type
|
|
*/
|
|
SourceType_t getSourceType() const noexcept {return m_SourceType;};
|
|
|
|
protected:
|
|
UserBufferSource(SourceType_t sourceType): m_SourceType(sourceType) {};
|
|
private:
|
|
const SourceType_t m_SourceType;
|
|
};
|
|
|
|
/**
|
|
* @brief .
|
|
*
|
|
* An source type where input data is delivered from OpenGL buffer
|
|
*/
|
|
class ZDL_EXPORT UserBufferSourceGLBuffer : public UserBufferSource{
|
|
public:
|
|
UserBufferSourceGLBuffer() : UserBufferSource(SourceType_t::GLBUFFER) {};
|
|
};
|
|
|
|
/**
|
|
* @brief .
|
|
*
|
|
* An encoding type where each element is represented by an unsigned int
|
|
*/
|
|
class ZDL_EXPORT UserBufferEncodingUnsigned8Bit : public UserBufferEncoding {
|
|
public:
|
|
UserBufferEncodingUnsigned8Bit() : UserBufferEncoding(ElementType_t::UNSIGNED8BIT) {};
|
|
size_t getElementSize() const noexcept override;
|
|
|
|
protected:
|
|
UserBufferEncodingUnsigned8Bit(ElementType_t elementType) : UserBufferEncoding(elementType) {};
|
|
|
|
};
|
|
|
|
/**
|
|
* @brief .
|
|
*
|
|
* An encoding type where each element is represented by a float
|
|
*/
|
|
class ZDL_EXPORT UserBufferEncodingFloat : public UserBufferEncoding {
|
|
public:
|
|
UserBufferEncodingFloat() : UserBufferEncoding(ElementType_t::FLOAT) {};
|
|
size_t getElementSize() const noexcept override;
|
|
|
|
};
|
|
|
|
/**
|
|
* @brief .
|
|
*
|
|
* An encoding type where each element is represented by tf8, which is an
|
|
* 8-bit quantizd value, which has an exact representation of 0.0
|
|
*/
|
|
|
|
class ZDL_EXPORT UserBufferEncodingTf8 : public UserBufferEncodingUnsigned8Bit {
|
|
public:
|
|
UserBufferEncodingTf8() = delete;
|
|
UserBufferEncodingTf8(unsigned char stepFor0, float stepSize) :
|
|
UserBufferEncodingUnsigned8Bit(ElementType_t::TF8),
|
|
m_StepExactly0(stepFor0),
|
|
m_QuantizedStepSize(stepSize) {};
|
|
|
|
UserBufferEncodingTf8(const zdl::DlSystem::UserBufferEncoding &ubEncoding) : UserBufferEncodingUnsigned8Bit(ubEncoding.getElementType()){
|
|
const zdl::DlSystem::UserBufferEncodingTf8* ubEncodingTf8
|
|
= dynamic_cast <const zdl::DlSystem::UserBufferEncodingTf8*> (&ubEncoding);
|
|
if (ubEncodingTf8) {
|
|
m_StepExactly0 = ubEncodingTf8->getStepExactly0();
|
|
m_QuantizedStepSize = ubEncodingTf8->getQuantizedStepSize();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Sets the step value that represents 0
|
|
*
|
|
* @param[in] stepExactly0 The step value that represents 0
|
|
*
|
|
*/
|
|
|
|
void setStepExactly0(const unsigned char stepExactly0) {
|
|
m_StepExactly0 = stepExactly0;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Sets the float value that each step represents
|
|
*
|
|
* @param[in] quantizedStepSize The float value of each step size
|
|
*
|
|
*/
|
|
|
|
void setQuantizedStepSize(const float quantizedStepSize) {
|
|
m_QuantizedStepSize = quantizedStepSize;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Retrieves the step that represents 0.0
|
|
*
|
|
* @return Step value
|
|
*/
|
|
|
|
unsigned char getStepExactly0() const {
|
|
return m_StepExactly0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Calculates the minimum floating point value that
|
|
* can be represented with this encoding.
|
|
*
|
|
* @return Minimum representable floating point value
|
|
*/
|
|
|
|
float getMin() const {
|
|
return m_QuantizedStepSize * (0 - m_StepExactly0);
|
|
}
|
|
|
|
|
|
/**
|
|
* Calculates the maximum floating point value that
|
|
* can be represented with this encoding.
|
|
*
|
|
* @return Maximum representable floating point value
|
|
*/
|
|
|
|
float getMax() const {
|
|
return m_QuantizedStepSize * (255 - m_StepExactly0);
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Retrieves the step size
|
|
*
|
|
* @return Step size
|
|
*/
|
|
|
|
float getQuantizedStepSize() const {
|
|
return m_QuantizedStepSize;
|
|
}
|
|
|
|
private:
|
|
unsigned char m_StepExactly0;
|
|
|
|
float m_QuantizedStepSize;
|
|
};
|
|
|
|
|
|
|
|
class ZDL_EXPORT UserBufferEncodingTfN : public UserBufferEncoding {
|
|
public:
|
|
UserBufferEncodingTfN() = delete;
|
|
UserBufferEncodingTfN(uint64_t stepFor0, float stepSize, uint8_t bWidth=8):
|
|
UserBufferEncoding(getTypeFromWidth(bWidth)),
|
|
bitWidth(bWidth),
|
|
m_StepExactly0(stepFor0),
|
|
m_QuantizedStepSize(stepSize){};
|
|
|
|
UserBufferEncodingTfN(const zdl::DlSystem::UserBufferEncoding &ubEncoding) : UserBufferEncoding(ubEncoding.getElementType()){
|
|
const zdl::DlSystem::UserBufferEncodingTfN* ubEncodingTfN
|
|
= dynamic_cast <const zdl::DlSystem::UserBufferEncodingTfN*> (&ubEncoding);
|
|
if (ubEncodingTfN) {
|
|
m_StepExactly0 = ubEncodingTfN->getStepExactly0();
|
|
m_QuantizedStepSize = ubEncodingTfN->getQuantizedStepSize();
|
|
bitWidth = ubEncodingTfN->bitWidth;
|
|
}
|
|
}
|
|
|
|
size_t getElementSize() const noexcept override;
|
|
/**
|
|
* @brief Sets the step value that represents 0
|
|
*
|
|
* @param[in] stepExactly0 The step value that represents 0
|
|
*
|
|
*/
|
|
void setStepExactly0(uint64_t stepExactly0) {
|
|
m_StepExactly0 = stepExactly0;
|
|
}
|
|
|
|
/**
|
|
* @brief Sets the float value that each step represents
|
|
*
|
|
* @param[in] quantizedStepSize The float value of each step size
|
|
*
|
|
*/
|
|
void setQuantizedStepSize(const float quantizedStepSize) {
|
|
m_QuantizedStepSize = quantizedStepSize;
|
|
}
|
|
|
|
/**
|
|
* @brief Retrieves the step that represents 0.0
|
|
*
|
|
* @return Step value
|
|
*/
|
|
uint64_t getStepExactly0() const {
|
|
return m_StepExactly0;
|
|
}
|
|
|
|
/**
|
|
* Calculates the minimum floating point value that
|
|
* can be represented with this encoding.
|
|
*
|
|
* @return Minimum representable floating point value
|
|
*/
|
|
float getMin() const {
|
|
return static_cast<float>(m_QuantizedStepSize * (0 - (double)m_StepExactly0));
|
|
}
|
|
|
|
/**
|
|
* Calculates the maximum floating point value that
|
|
* can be represented with this encoding.
|
|
*
|
|
* @return Maximum representable floating point value
|
|
*/
|
|
float getMax() const{
|
|
return static_cast<float>(m_QuantizedStepSize * (pow(2,bitWidth)-1 - (double)m_StepExactly0));
|
|
};
|
|
|
|
/**
|
|
* @brief Retrieves the step size
|
|
*
|
|
* @return Step size
|
|
*/
|
|
float getQuantizedStepSize() const {
|
|
return m_QuantizedStepSize;
|
|
}
|
|
|
|
ElementType_t getTypeFromWidth(uint8_t width);
|
|
|
|
uint8_t bitWidth;
|
|
private:
|
|
uint64_t m_StepExactly0;
|
|
float m_QuantizedStepSize;
|
|
};
|
|
|
|
|
|
/**
|
|
* @brief UserBuffer contains a pointer and info on how to walk it and interpret its content.
|
|
*/
|
|
class ZDL_EXPORT IUserBuffer {
|
|
public:
|
|
virtual ~IUserBuffer() = default;
|
|
|
|
/**
|
|
* @brief Retrieves the total number of bytes between elements in each dimension if
|
|
* the buffer were to be interpreted as a multi-dimensional array.
|
|
*
|
|
* @return Number of bytes between elements in each dimension.
|
|
* e.g. A tightly packed tensor of floats with dimensions [4, 3, 2] would
|
|
* return strides of [24, 8, 4].
|
|
*/
|
|
virtual const TensorShape& getStrides() const = 0;
|
|
|
|
/**
|
|
* @brief Retrieves the size of the buffer, in bytes.
|
|
*
|
|
* @return Size of the underlying buffer, in bytes.
|
|
*/
|
|
virtual size_t getSize() const = 0;
|
|
|
|
/**
|
|
* @brief Retrieves the size of the inference data in the buffer, in bytes.
|
|
*
|
|
* The inference results from a dynamic-sized model may not be exactly the same size
|
|
* as the UserBuffer provided to SNPE. This function can be used to get the amount
|
|
* of output inference data, which may be less or greater than the size of the UserBuffer.
|
|
*
|
|
* If the inference results fit in the UserBuffer, getOutputSize() would be less than
|
|
* or equal to getSize(). But if the inference results were more than the capacity of
|
|
* the provided UserBuffer, the results would be truncated to fit the UserBuffer. But,
|
|
* getOutputSize() would be greater than getSize(), which indicates a bigger buffer
|
|
* needs to be provided to SNPE to hold all of the inference results.
|
|
*
|
|
* @return Size required for the buffer to hold all inference results, which can be less
|
|
* or more than the size of the buffer, in bytes.
|
|
*/
|
|
virtual size_t getOutputSize() const = 0;
|
|
|
|
/**
|
|
* @brief Changes the underlying memory that backs the UserBuffer.
|
|
*
|
|
* This can be used to avoid creating multiple UserBuffer objects
|
|
* when the only thing that differs is the memory location.
|
|
*
|
|
* @param[in] buffer Pointer to the memory location
|
|
*
|
|
* @return Whether the set succeeds.
|
|
*/
|
|
virtual bool setBufferAddress(void *buffer) noexcept = 0;
|
|
|
|
/**
|
|
* @brief Gets a const reference to the data encoding object of
|
|
* the underlying buffer
|
|
*
|
|
* This is necessary when the UserBuffer is filled by SNPE with
|
|
* data types such as TF8, where the caller needs to know the quantization
|
|
* parameters in order to interpret the data properly
|
|
*
|
|
* @return A read-only encoding object
|
|
*/
|
|
virtual const UserBufferEncoding& getEncoding() const noexcept = 0;
|
|
|
|
/**
|
|
* @brief Gets a reference to the data encoding object of
|
|
* the underlying buffer
|
|
*
|
|
* This is necessary when the UserBuffer is re-used, and the encoding
|
|
* parameters can change. For example, each input can be quantized with
|
|
* different step sizes.
|
|
*
|
|
* @return Data encoding meta-data
|
|
*/
|
|
virtual UserBufferEncoding& getEncoding() noexcept = 0;
|
|
|
|
};
|
|
|
|
/** @} */ /* end_addtogroup c_plus_plus_apis C++ */
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|