I'm quite new to emscripten, so please be patient with me :)
My goal is to create a wrapper class with an instance of a VideoDecoder
object from WebCodecs API and pass some configurations inside it from C++.
I'm trying to pass an object called 'init' on the global "VideoDecoder"
object, which accepts a callback function on its members: output and error:
LVideoDecoderWebCodecs::LVideoDecoderWebCodecs()
{
val VideoDecoder = val::global("VideoDecoder");
if (!VideoDecoder.as<bool>()) {
EM_ASM(
console.error("WebCodecs API not available");
);
}
val config = val::object();
config.set("codec", val("vp8"));
config.set("codedWidth", val(640));
config.set("codedHeight", val(480));
val init = val::object();
init.set("output", [](val frame) {
EM_ASM(
console.log("Got frame: ", frame);
);
});
init.set("error", [](val e) {
EM_ASM(
console.error("Error initializing decoder: ", e);
);
});
val decoder = VideoDecoder.new_(init);
decoder.call<void>("configure", config);
}
The module compiles successfully but when I run it on the browser it says,
wasmapi.js:4543 Uncaught BindingError: _emval_take_value has unknown type
It seems that I can't set a callback function on the init object.
Is there a solution to this? Or what can you suggest I handle this one.
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