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OpenCV-Erlang/Elixir binding.

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evision c_src modules evision_video_api.h
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c_src/modules/evision_video_api.h 

#ifdef HAVE_OPENCV_VIDEO



#ifndef EVISION_VIDEO_API_H

#define EVISION_VIDEO_API_H



template <>

ERL_NIF_TERM evision_from_as_map(ErlNifEnv *env, const cv::Ptr<cv::VideoCapture>& cap, ERL_NIF_TERM res_term) {

    const size_t num_items = 7;

    size_t item_index = 0;



    ERL_NIF_TERM keys[num_items];

    ERL_NIF_TERM values[num_items];



    keys[item_index] = enif_make_atom(env, "frame_width");

    values[item_index] = enif_make_double(env, cap->get(cv::CAP_PROP_FRAME_WIDTH));

    item_index++;



    keys[item_index] = enif_make_atom(env, "frame_height");

    values[item_index] = enif_make_double(env, cap->get(cv::CAP_PROP_FRAME_HEIGHT));

    item_index++;



    keys[item_index] = enif_make_atom(env, "fps");

    values[item_index] = enif_make_double(env, cap->get(cv::CAP_PROP_FPS));

    item_index++;



    keys[item_index] = enif_make_atom(env, "isOpened");

    values[item_index] = enif_make_atom(env, cap->isOpened() ? "true" : "false");

    item_index++;



    keys[item_index] = enif_make_atom(env, "frame_count");

    values[item_index] = enif_make_double(env, cap->get(cv::CAP_PROP_FRAME_COUNT));

    item_index++;



    keys[item_index] = enif_make_atom(env, "ref");

    values[item_index] = res_term;

    item_index++;



    keys[item_index] = enif_make_atom(env, "class");

    values[item_index] = enif_make_atom(env, "VideoCapture");

    item_index++;



    ERL_NIF_TERM map;

    if (enif_make_map_from_arrays(env, keys, values, item_index, &map)) {

        return map;

    } else {

        return enif_make_atom(env, "error when making map from arrays");

    }

}



#endif //  EVISION_VIDEO_API_H



#endif //  HAVE_OPENCV_VIDEO