TI对OpenVX标准的实现-TIOVX

TIOVX是TI对OpenVX标准的实现

TIOVX允许用户使用OpenVX API创建视觉和计算应用程序。这些OpenVX应用程序可以在TDA2x、TDA3x和TDA4x等TI SoC上执行。TIOVX完全符合OpenVX v1.1规范。TIOVX还为C66x DSP提供了优化的OpenVX内核。扩展API允许用户集成自主开发的自定义内核，并使用OpenVX API调用它们。作为处理器SDK Vision的一部分，还提供了显示TIOVX作为更大系统的一部分使用的示例，例如，相机输入和显示输出。

TIOVX的顶级框图如下所示。

 

TIOVX框图

该图的组件描述如下

TIOVX Module	Description
Khronos Conformance Test	OpenVX conformance test from Khronos to make sure an implementation implements OpenVX according to specification
TI Extension Conformance Test	Additional test cases from TI to test TI extention interfaces
OpenVX API	OpenVX API as defined by Khronos
TIOVX API	TI extensions and additional APIs in order to efficiently use OpenVX on TI platforms
TIOVX Framework	TI's implementation of OpenVX spec. This layer is agnostic of underlying SoC, OS platform
TIOVX Platform	This layer binds TIOVX framework to a specific platform. Ex, Processor SDK platform for TDA4x SOCs. This layer also binds TIOVX framework to a specific OS like Linux or TI-RTOS.
TIOVX Kernel Wrapper	Kernel wrappers allow TI and customers to integrate a natively implemented kernel into the TIOVX framework.
Examples	These are examples which show usage of TIOVX with other system level compoenents. These are not included in TIOVX package. Users should refer to SDK for these examples.
User Kernels / Target Kernels	User kernels is an interface to integrate user kernels on HOST CPU using standard Khronos OpenVX APIs. Target kernels is a TI specific interface to integrate user kernels on target CPU like DSP

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Directory Structure

The following describes the contents of the package.

Folder	Desc
conformance_tests/kernels	Kernels added only for test purposes (to test target kernel APIs)
conformance_tests/test_conformance	Khronos OpenVX conformance test
conformance_tests/test_engine
conformance_tests/test_data	Data files used for Khronos Conformance test, TI test suite, and tutorial input data files
conformance_tests/test_executable	Khronos OpenVX conformance test executable (PC HOST emulation mode only)
conformance_tests/test_tiovx	Additional test cases for Khronos OpenVX APIs and TI extention APIs
docs	User documentation
include/VX	Khronos OpenVX interface
include/TI	TI OpenVX extension interface
kernels/openvx-core	OpenVX defined kernels
kernels*	TI vendor-specific kernels, including unit test for the kernels
source/framework	TI OpenVX implementation
source/include
source/vxu
source/platform	TI OpenVX platform adaptation layer
tools	OpenVX use case and kernel wrapper code generation tool
tutorial	TI OpenVX tutorials
utils	Helpful utilities like image readers
out	Build generated files and executables
lib	Pre-built dependency libraries (PC) and tiovx libraries copied from out folder at end of build

Note: since the 8.6 release the below folders have been moved to the following locations:

8.6 Location	9.0 (and beyond) Location
tiovx/concerto	sdk_builder/concerto
tiovx/kernels_j7/hwa	imaging/kernels/hwa
tiovx/kernels_j7/tidl	c7x-mma-tidl/arm-tidl/tiovx_kernels/tidl
Build Option	Description	Default Setting
PROFILE	Determines which profile to build for Valid values are: release, debug, all	all
BUILD_EMULATION_MODE	Builds PC emulation mode	yes
BUILD_EMULATION_ARCH	PC emulation architecture. Valid values are: X86 x86_64 all	x86_64
BUILD_TARGET_MODE	Builds for target SoC platform like TDAxx	yes
BUILD_CONFORMANCE_TEST	Builds entire test suite executable	yes
BUILD_IVISION_KERNELS	Builds iVision kernels (EVE_SW_PATH required to be set for this build)	no
BUILD_BAM	Builds DMA wrapper (DMAUTILS_PATH and ALGFRAMEWORK_PATH required to be set for this build)	no
BUILD_TUTORIAL	Builds OpenVX tutorial	yes
BUILD_LINUX_MPU	Builds for A72 Linux target (NOT used in PC HOST emulation mode	yes
BUILD_EVE	Builds for EVE platform (ARP32CGT_ROOT and EVE_SW_PATH required to be set for this build)	no
BUILD_SDK	Builds for SDK SW platform Valid values are, psdkra for Processor SDK RTOS J7 platform	psdkra
BUILD_IGNORE_LIB_ORDER	When set to yes, it ignores the static library order listed in makefiles when building on the PC.	yes
BUILD_CT_KHR	Builds and includes the Khronos OpenVX 1.1 conformance tests suite.	yes
BUILD_CT_TIOVX	Builds and includes the TI-added tests suite (for TI extensions and additional rohbustness testing).	yes
BUILD_CT_TIOVX_TEST_KERNELS	Builds and includes the TI-added tests suite (for testing custom kernel interface).	yes
BUILD_CT_TIOVX_IVISION	Builds and includes the tests for IVISION kernels test suite.	no
BUILD_CT_TIOVX_TIDL	Builds and includes the tests for TIDL kernel test suite.	yes
BUILD_CT_TIOVX_HWA	Builds and includes the tests for HWA kernels test suite.	yes
BUILD_CT_TIOVX_HWA_NEGATIVE_TESTS	Builds and includes a large set of negative tests for HWA kernels	yes
BUILD_CT_TIOVX_HWA_DISPLAY_TESTS	Builds and includes display test cases Note: in order to run on J7 platform, a display must be connected	no
BUILD_CT_TIOVX_HWA_CAPTURE_TESTS	Builds and includes a large set of negative tests for HWA kernels Note: in order to run on J7 platform, 4 IMX390 cameras must be connected to a Fusion board which is connected to the EVM	no
BUILD_CT_TIOVX_HWA_CSITX_TESTS	Builds and includes csitx test cases Note: in order to run on J7 platform, the following setup is required: EVM Board Configuration: By default DPHY is connected to FPD Panel (DSI-TX), it has to be changed to DSI FPC(CSI-TX). J7X LI(Leopard Imaging) Serial Capture Board FPC Cable: Connect Csitx to Csirx. This test uses CSIRX to receive the data transmitted by CSITX, hence lane speed for both modules should be same. This tests confgiures the CSITX lane speed to 800 Mbps.	no

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Kernel	C66x 1	C66x 2	HWA	PC Emulation Support
Absolute Difference	Cache	Cache		Yes
Accumulate	Cache	Cache		Yes
Accumulate Squared	Cache	Cache		Yes
Accumulate Weighted	Cache	Cache		Yes
Arithmetic Addition	Cache	Cache		Yes
Arithmetic Subtraction	Cache	Cache		Yes
Bitwise AND	Cache	Cache		Yes
Bitwise EXCLUSIVE OR	Cache	Cache		Yes
Bitwise INCLUSIVE OR	Cache	Cache		Yes
Bitwise NOT	Cache	Cache		Yes
Box Filter	Cache	Cache		Yes
Canny Edge Detector	Cache	Cache		Yes
Channel Combine	Cache	Cache		Yes
Channel Extract	Cache	Cache		Yes
Color Convert	Cache	Cache		Yes
Convert Bit depth	Cache	Cache		Yes
Custom Convolution	Cache	Cache		Yes
Dilate Image	Cache	Cache		Yes
Equalize Histogram	Cache	Cache		Yes
Erode Image	Cache	Cache		Yes
Fast Corners	Cache	Cache		Yes
Gaussian Filter	Cache	Cache		Yes
Non Linear Filter	Cache	Cache		Yes
Harris Corners	Cache	Cache		Yes
Histogram	Cache	Cache		Yes
Gaussian Image Pyramid	Cache	Cache	VPAC_MSC*	Yes
Laplacian Image Pyramid	Cache	Cache		Yes
Reconstruction from a Laplacian Image Pyramid	Cache	Cache		Yes
Integral Image	Cache	Cache		Yes
Magnitude	Cache	Cache		Yes
Mean and Standard Deviation	Cache	Cache		Yes
Median Filter	Cache	Cache		Yes
Min, Max Location	Cache	Cache		Yes
Optical Flow Pyramid (LK)	Cache	Cache		Yes
Phase	Cache	Cache		Yes
Pixel-wise Multiplication	Cache	Cache		Yes
Remap	Cache	Cache		Yes
Scale Image	Cache	Cache	VPAC_MSC*	Yes
Sobel 3x3	Cache	Cache		Yes
TableLookup	Cache	Cache		Yes
Thresholding	Cache	Cache		Yes
Warp Affine	Cache	Cache		Yes
Warp Perspective	Cache	Cache		Yes

• Subset of configuration options and or accuracy tradeoff to speed is to be considered for this HWA implementation.

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TI Extension Kernels

Note: the below node implementation locations have changed from the 8.6 to 9.0 releases. The new locations can be referenced in Directory Structure document.

Kernel	Target	PC Emulation Support
tivxCaptureNode	CSIRX	No
tivxDisplayNode	DSS	No
tivxTIDLNode	C7x + MMA	Yes
tivxVpacVissNode	VPAC_VISS	Yes
tivxVpacLdcNode	VPAC_LDC	Yes
tivxVpacNfGenericNode	VPAC_NF	Yes
tivxVpacNfBilateralNode	VPAC_NF	Yes
tivxVpacMscScaleNode	VPAC_MSC	Yes
tivxVpacMscPyramidNode	VPAC_MSC	Yes
tivxDmpacSdeNode	DMPAC_SDE	Yes
tivxDmpacDofNode	DMPAC_DOF	Yes
tivxCsitxNode	CSITX	No
tivxDisplayM2MNode	DSS	No

 

 

参考文献链接

https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/latest/exports/docs/tiovx/docs/user_guide/index.html