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#include "caffe2/core/context.h"
#include "caffe2/core/logging.h"
#include "caffe2/core/operator.h"
#include "caffe2/core/timer.h"
#include "snpe_ffi.h"
#include <dlfcn.h>
namespace caffe2 {
template <typename T>
using deleted_unique_ptr = std::unique_ptr<T, std::function<void(T*)>>;
class SNPEOp final : public Operator<CPUContext> {
public:
SNPEOp(const OperatorDef& def, Workspace* ws) : Operator<CPUContext>(def, ws),
model_buffer_(OperatorBase::GetSingleArgument<string>("model_buffer", "")),
input_name_(OperatorBase::GetSingleArgument<string>("input_name", "data"))
{
CAFFE_ENFORCE(gSNPELocation() != "", "SNPE library \"", gSNPELocation(), "\" does not exist.");
std::ostringstream snpe_ffi;
snpe_ffi << gSNPELocation() << "/" << snpe_ffi_so;
handle_ = deleted_unique_ptr<void>(dlopen(snpe_ffi.str().c_str(), RTLD_LAZY), [](void* handle) {
if (handle) {
dlclose(handle);
}
});
if (!handle_.get()) {
std::cerr << dlerror() << std::endl;
}
OPERATOR_NEEDS_FEATURE(handle_.get(), "Couldn't find ", snpe_ffi.str());
#define X(n) \
dlerror(); \
auto* n##_f = (decltype(&n))dlsym(handle_.get(), #n); \
OPERATOR_NEEDS_FEATURE(n##_f, dlerror());
{
X(snpe_has_gpu);
X(snpe_create);
X(snpe_destroy);
X(snpe_get_input_dims);
X(snpe_run);
X(snpe_copy_output_to);
}
X(snpe_has_gpu);
OPERATOR_NEEDS_FEATURE(snpe_has_gpu_f(), "No GPU found, cannot use SNPE.");
X(snpe_create)
#undef X
// Redefine to use CAFFE_ENFORCE instead of OPERATOR_NEEDS_FEATURE.
#define X(n) \
dlerror(); \
auto* n##_f = (decltype(&n))dlsym(handle_.get(), #n); \
CAFFE_ENFORCE(n##_f, dlerror());
CAFFE_ENFORCE(def.input_size(), "No inputs.");
if (input_name_ == "") {
input_name_ = def.input().Get(0);
}
ctx_ = deleted_unique_ptr<void>(snpe_create_f(reinterpret_cast<const unsigned char *>(model_buffer_.data()),
model_buffer_.length(), input_name_.c_str()), [this](void* ctx) {
if (ctx) {
X(snpe_destroy);
snpe_destroy_f(ctx);
}
});
}
bool RunOnDevice() override {
CAFFE_ENFORCE(gSNPELocation() != "", "SNPE library was never loaded.");
X(snpe_get_input_dims);
size_t const* dims;
size_t dimSize;
snpe_get_input_dims_f(ctx_.get(), &dims, &dimSize);
if (Input(0).ndim() != dimSize) {
if (dimSize == 3 && dimSize == Input(0).ndim() - 1 && Input(0).dim32(0) == 1) {
const int C = Input(0).dim32(1);
const int H = Input(0).dim32(2);
const int W = Input(0).dim32(3);
if (dims[0] != C ||
dims[1] != H ||
dims[2] != W) {
CAFFE_THROW("Input size must match what SNPE expects, which in this case is: ",
dims[0], " ", dims[1], " ", dims[2]);
}
} else {
CAFFE_THROW("SNPE input dimensions are not compatible.");
}
} else {
for (auto i = 0; i < Input(0).ndim(); ++i) {
CAFFE_ENFORCE_EQ(dims[i], Input(0).dim32(i), "SNPE input dimension is not compatible.");
}
}
X(snpe_run);
CAFFE_ENFORCE(ctx_.get(), "SNPE context doesn't exist.");
snpe_run_f(ctx_.get(), Input(0).data<float>(), Input(0).size(), &dims, &dimSize);
std::vector<int64_t> outputDims(dimSize + 1);
outputDims[0] = 1;
for (auto i = 0; i < dimSize; ++i) {
outputDims[i+1] = dims[i];
};
Output(0)->Resize(outputDims);
X(snpe_copy_output_to);
snpe_copy_output_to_f(ctx_.get(), Output(0)->mutable_data<float>());
CAFFE_ENFORCE(
Output(0)->data<float>(), "nullptr where output should be!\n");
return true;
}
private:
string model_buffer_;
string input_name_;
deleted_unique_ptr<void> handle_;
// needs to be destroyed *before* handle_
deleted_unique_ptr<void> ctx_;
};
REGISTER_CPU_OPERATOR(SNPE, SNPEOp);
}
#undef X
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