void example_explore_parameters(vx_context context, vx_kernel kernel)
{
vx_uint32 p, numParams = 0;
vx_graph graph = vxCreateGraph(context);
vx_node node = vxCreateGenericNode(graph, kernel);
vxQueryKernel(kernel, VX_KERNEL_PARAMETERS, &numParams, sizeof(numParams));
for (p = 0; p < numParams; p++)
{
//! [Getting the ref]
vx_parameter param = vxGetParameterByIndex(node, p);
vx_reference ref;
vxQueryParameter(param, VX_PARAMETER_REF, &ref, sizeof(ref));
//! [Getting the ref]
if (ref)
{
//! [Getting the type]
vx_enum type;
vxQueryParameter(param, VX_PARAMETER_TYPE, &type, sizeof(type));
/* cast the ref to the correct vx_<type>. Atomics are now vx_scalar */
//! [Getting the type]
}
vxReleaseParameter(¶m);
}
vxReleaseNode(&node);
vxReleaseGraph(&graph);
}
//**************************************************************************
// EXPORTED FUNCTIONS
//**************************************************************************
static void Initialize(JNIEnv *env, jobject obj, jlong g, jlong k)
{
vx_graph graph = (vx_graph)g;
vx_kernel kernel = (vx_kernel)k;
vx_node n = vxCreateGenericNode(graph, kernel);
SetHandle(env, obj, NodeClass, parentName, g);
SetHandle(env, obj, NodeClass, handleName, (jlong)n);
}
vx_node vx_create_specific_sobel(vx_context context, vx_graph graph, vx_bool easy)
{
vx_node n = 0;
if (easy == vx_false_e) {
//! [firstmethod]
vx_kernel kernel = vxGetKernelByEnum(context, VX_KERNEL_SOBEL_3x3);
vx_node node = vxCreateGenericNode(graph, kernel);
//! [firstmethod]
#if defined(EXPERIMENTAL_USE_TARGET)
vx_target target = vxGetTargetByName(context, "gpu");
vxAssignNodeAffinity(node, target);
#endif
#if defined(EXPERIMENTAL_USE_VARIANTS)
//! [variant:firstmethod]
vxChooseKernelVariant(node, "faster");
//! [variant:firstmethod]
#endif
n = node;
} else {
#if defined(EXPERIMENTAL_USE_VARIANTS)
//! [variant:second]
#if defined(EXPERIMENTAL_USE_TARGET)
vx_kernel kernel = vxGetKernelByName(context, "cpu:org.khronos.openvx.sobel3x3:faster");
#else
vx_kernel kernel = vxGetKernelByName(context, "org.khronos.openvx.sobel3x3:faster");
#endif
vx_node node = vxCreateGenericNode(graph, kernel);
//! [variant:second]
#else /*defined(EXPERIMENTAL_USE_VARIANTS)*/
//! [secondmethod]
vx_kernel kernel = vxGetKernelByName(context, "org.khronos.openvx.sobel3x3");
vx_node node = vxCreateGenericNode(graph, kernel);
//! [secondmethod]
#endif
n = node;
}
return n;
}
//! [node]
vx_node vxXYZNode(vx_graph graph, vx_image input, vx_uint32 value, vx_image output, vx_array temp)
{
vx_uint32 i;
vx_node node = 0;
vx_context context = vxGetContext((vx_reference)graph);
vx_status status = vxLoadKernels(context, "xyz");
if (status == VX_SUCCESS)
{
//! [xyz node]
vx_kernel kernel = vxGetKernelByName(context, VX_KERNEL_NAME_KHR_XYZ);
if (kernel)
{
node = vxCreateGenericNode(graph, kernel);
if (vxGetStatus((vx_reference)node) == VX_SUCCESS)
{
vx_status statuses[4];
vx_scalar scalar = vxCreateScalar(context, VX_TYPE_INT32, &value);
statuses[0] = vxSetParameterByIndex(node, 0, (vx_reference)input);
statuses[1] = vxSetParameterByIndex(node, 1, (vx_reference)scalar);
statuses[2] = vxSetParameterByIndex(node, 2, (vx_reference)output);
statuses[3] = vxSetParameterByIndex(node, 3, (vx_reference)temp);
vxReleaseScalar(&scalar);
for (i = 0; i < dimof(statuses); i++)
{
if (statuses[i] != VX_SUCCESS)
{
status = VX_ERROR_INVALID_PARAMETERS;
vxReleaseNode(&node);
vxReleaseKernel(&kernel);
node = 0;
kernel = 0;
break;
}
}
}
else
{
vxReleaseKernel(&kernel);
}
}
else
{
vxUnloadKernels(context, "xyz");
}
//! [xyz node]
}
return node;
}
////////
// The node creation interface for the "app.userkernels.tensor_cos" kernel.
// This user kernel example expects parameters in the following order:
// parameter #0 -- input tensor of format VX_TYPE_INT16
// parameter #1 -- output tensor of format VX_TYPE_INT16
//
// TODO STEP 01:********
// 1. Use vxGetKernelByEnum API to get a kernel object from USER_KERNEL_TENSOR_COS.
// Note that you need to use vxGetContext API to get the context from a graph object.
// 2. Use vxCreateGenericNode API to create a node from the kernel object.
// 3. Use vxSetParameterByIndex API to set node arguments.
// 4. Release the kernel object that are not needed any more.
// 5. Use ERROR_CHECK_OBJECT and ERROR_CHECK_STATUS macros for error detection.
vx_node userTensorCosNode( vx_graph graph,
vx_tensor input,
vx_tensor output )
{
vx_context context = vxGetContext( ( vx_reference ) graph );
vx_kernel kernel = vxGetKernelByEnum( context, USER_KERNEL_TENSOR_COS );
ERROR_CHECK_OBJECT( kernel );
vx_node node = vxCreateGenericNode( graph, kernel );
ERROR_CHECK_OBJECT( node );
// ERROR_CHECK_STATUS( vxSetParameterByIndex( node, 0, ( vx_reference ) /* Fill in parameter */ ) );
// ERROR_CHECK_STATUS( vxSetParameterByIndex( node, 1, ( vx_reference ) /* Fill in parameter */ ) );
ERROR_CHECK_STATUS( vxReleaseKernel( &kernel ) );
return node;
}
vx_node vxCreateNodeByStructure(vx_graph graph,
vx_enum kernelenum,
vx_reference params[],
vx_uint32 num)
{
vx_status status = VX_SUCCESS;
vx_node node = 0;
vx_context context = vxGetContext((vx_reference)graph);
vx_kernel kernel = vxGetKernelByEnum(context, kernelenum);
if (kernel)
{
node = vxCreateGenericNode(graph, kernel);
if (node)
{
vx_uint32 p = 0;
for (p = 0; p < num; p++)
{
status = vxSetParameterByIndex(node,
p,
params[p]);
if (status != VX_SUCCESS)
{
vxAddLogEntry((vx_reference)graph, status, "Kernel %d Parameter %u is invalid.\n", kernelenum, p);
vxReleaseNode(&node);
node = 0;
break;
}
}
}
else
{
vxAddLogEntry((vx_reference)graph, VX_ERROR_INVALID_PARAMETERS, "Failed to create node with kernel enum %d\n", kernelenum);
status = VX_ERROR_NO_MEMORY;
}
vxReleaseKernel(&kernel);
}
else
{
vxAddLogEntry((vx_reference)graph, VX_ERROR_INVALID_PARAMETERS, "failed to retrieve kernel enum %d\n", kernelenum);
status = VX_ERROR_NOT_SUPPORTED;
}
return node;
}
static VALUE Node_init(int argc, VALUE *args, VALUE self)
{
vx_graph graph = 0;
vx_kernel kernel = 0;
Check_Type(self, T_DATA);
if (argc <= 1)
rb_raise(rb_eArgError, "Not enough arguments");
graph = (vx_graph)DATA_PTR(args[0]);
if (argc == 2) // Kernel
{
Check_Type(args[1], T_DATA);
kernel = (vx_kernel)DATA_PTR(args[1]);
DATA_PTR(self) = (void *)vxCreateGenericNode(graph, kernel);
}
else if (argc == 3) // graph, [string|enum], array of hashes
{
vx_node node = 0;
VALUE kern = args[1];
VALUE array = args[2];
long param = 0;
if (TYPE(kern) == T_STRING)
kernel = vxGetKernelByName(context, RSTRING_PTR(kern));
else if (TYPE(kern) == T_FIXNUM)
kernel = vxGetKernelByEnum(context, FIX2INT(kern));
else if (TYPE(kern) == T_DATA) // a OpenVX::Kernel
kernel = (vx_kernel)DATA_PTR(kern);
else
rb_raise(rb_eTypeError, "kernel must be a string, fixnum, or OpenVX::Kernel");
if (kernel == 0)
rb_raise(rb_eNameError, "kernel could not be found in OpenVX");
Check_Type(array, T_ARRAY);
node = vxCreateGenericNode(graph, kernel);
if (node == 0)
rb_raise(rb_eTypeError, "node could not be created!");
REXT_PRINT("Array of parameters has len = %ld\n", RARRAY_LEN(array));
for (param = 0; param < RARRAY_LEN(array) ; param++)
{
VALUE ref,hash;
vx_reference ref2 = 0;
vx_status status = 0;
const char *name = NULL;
hash = rb_ary_entry(array, param);
Check_Type(hash, T_HASH);
ref = rb_hash_aref(hash, ID2SYM(rb_intern("ref")));
name = rb_obj_classname(ref);
REXT_PRINT("ref class = %s\n", name);
Check_Type(ref, T_DATA);
ref2 = (vx_reference)DATA_PTR(ref);
status = vxSetParameterByIndex(node, param, ref2);
REXT_PRINT("status = %d\n", status);
}
DATA_PTR(self) = (void *)node;
}
else
{
rb_raise(rb_eArgError, "incorrect number of arguments");
}
return Qnil;
}
