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OpenCV-Erlang/Elixir binding.
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c_src/evision_custom_headers/evision_ml.hpp
template<>
bool evision_to(ErlNifEnv *env, ERL_NIF_TERM obj, CvTermCriteria& dst, const ArgInfo& info)
{
CV_UNUSED(info);
if (evision::nif::check_nil(env, obj)) {
return true;
}
const ERL_NIF_TERM *terms;
int length;
if (!enif_get_tuple(env, obj, &length, &terms)) {
failmsg(env, "Can't parse '%s' as TermCriteria."
"Input argument is not a tuple",
info.name);
return false;
}
const std::size_t sequenceSize = length;
if (sequenceSize != 3)
{
failmsg(env, "Can't parse '%s' as CvTermCriteria. Expected sequence length 3, got %lu",
info.name, sequenceSize);
return false;
}
{
const String typeItemName = format("'%s' type", info.name);
const ArgInfo typeItemInfo(typeItemName.c_str(), false);
if (!evision_to(env, terms[0], dst.type, typeItemInfo))
{
return false;
}
}
{
const String maxIterItemName = format("'%s' max_iter", info.name);
const ArgInfo maxIterItemInfo(maxIterItemName.c_str(), false);
if (!evision_to(env, terms[1], dst.max_iter, maxIterItemInfo))
{
return false;
}
}
{
const String epsilonItemName = format("'%s' epsilon", info.name);
const ArgInfo epsilonItemInfo(epsilonItemName.c_str(), false);
if (!evision_to(env, terms[2], dst.epsilon, epsilonItemInfo))
{
return false;
}
}
return true;
}
template<>
bool evision_to(ErlNifEnv *env, ERL_NIF_TERM obj, CvSlice& r, const ArgInfo& info)
{
CV_UNUSED(info);
if (evision::nif::check_nil(env, obj)) {
return true;
}
const ERL_NIF_TERM *terms;
int length;
if (!enif_get_tuple(env, obj, &length, &terms)) {
failmsg(env, "Can't parse '%s' as TermCriteria."
"Input argument is not a tuple",
info.name);
return false;
}
const std::size_t sequenceSize = length;
if(sequenceSize == 0)
{
r = CV_WHOLE_SEQ;
return true;
}
if (sequenceSize != 2)
{
failmsg(env, "Can't parse '%s' as CvSlice. Expected sequence length 2, got %lu",
info.name, sequenceSize);
return false;
}
{
const String startIndexItemName = format("'%s' start index", info.name);
const ArgInfo startIndexItemInfo(startIndexItemName.c_str(), false);
if (!evision_to(env, terms[0], r.start_index, startIndexItemInfo))
{
return false;
}
}
{
const String endIndexItemName = format("'%s' end index", info.name);
const ArgInfo endIndexItemInfo(endIndexItemName.c_str(), false);
if (!evision_to(env, terms[1], r.end_index, endIndexItemInfo))
{
return false;
}
}
return true;
}