Method convert

source/cv/ImageProcess.cpp:124–168

}

ErrorCode ImageProcess::convert(const uint8_t* source, int iw, int ih, int stride, Tensor* destOrigin) {
    auto dest = destOrigin;
    if (nullptr == dest || nullptr == source) {
        MNN_ERROR("null dest or source for image process\n");
        return INPUT_DATA_ERROR;
    }
    if (TensorUtils::getDescribeOrigin(dest)->getBackend() == nullptr && destOrigin->buffer().host == nullptr) {
        MNN_ERROR("Invalid Tensor, the session may not be ready\n");
        return INPUT_DATA_ERROR;
    }
    std::shared_ptr<Tensor> tempTensor;
    auto ow              = dest->width();
    auto oh              = dest->height();
    auto bpp             = dest->channel();
    auto dimensionFormat = TensorUtils::getDescribe(dest)->dimensionFormat;
    auto tensorBn = TensorUtils::getDescribeOrigin(dest)->getBackend();
    auto bnType = MNN_FORWARD_CPU;
    if(tensorBn){
        bnType = tensorBn->type();
    }
    if (bnType != MNN_FORWARD_CPU) {
        tempTensor.reset(Tensor::create({1, bpp, oh, ow}, dest->getType(), nullptr, Tensor::CAFFE_C4),[destOrigin] (void* p) {
            auto hostTensor = (Tensor*)p;
            destOrigin->copyFromHostTensor(hostTensor);
            delete hostTensor;
        });
        dest = tempTensor.get();
    }
    else if (MNN_DATA_FORMAT_NCHW == dimensionFormat) {
        tempTensor.reset(Tensor::create(dest->shape(), dest->getType(), nullptr, Tensor::CAFFE_C4), [destOrigin](void* p) {
            auto hostTensor = (Tensor*)p;
            CPUTensorConverter::convert(hostTensor, destOrigin);
            delete hostTensor;
        });
        dest = tempTensor.get();
    }
    dimensionFormat = TensorUtils::getDescribe(dest)->dimensionFormat;
    if (dimensionFormat == MNN_DATA_FORMAT_NC4HW4) {
        bpp = 4;
    }
    int ic = _getBpp(mInside->config.sourceFormat);
    mInside->proc->setPadding(mPaddingValue);
    mInside->proc->resizeFunc(ic, iw, ih, bpp, ow, oh, dest->getType(), stride);
    return mInside->proc->execFunc(source, stride, dest->host<void>());
}

ErrorCode ImageProcess::convert(const uint8_t* source, int iw, int ih, int stride, void* dest, int ow, int oh,
                                int outputBpp, int outputStride, halide_type_t type) {