[SOLVED] Async class for Image Treatment

[anthony.liot]

Hi, I have a script function who do some image treatment for generate 3D model. The treatment are basic (INPUT) Image -> [ Grayscale + Prewitt + Sobel + Canny + FloodFill ] -> Mesh (OUTPUT), for the moment I work only on the Image treatment.

 

The basic call are inside a for loop (sequential) : 

	log.message("AL --> Begin on '%d' images\n\n", images.size());

	foreach (string img; images) {
	
		begin_time = clock();
		log.message("\tAL --> Start Generator on '%s' \n", img);
		Generator gen = new Generator(img);
		gen.exec();
		delete gen;	
		log.message("\tAL --> Generate image '%s' in %.4f seconds (%d ms)\n\n", img, (clock() - begin_time), (clock() - begin_time) * 1000);
	}

	log.message("AL --> END '%d' images in %.4f seconds (%d ms)\n\n", images.size(), (clock() - global_time), (clock() - global_time) * 1000);

I want make a version faster, using Async class for paralyze the call of generator, I try something like that : 

namespace AsyncGenerator {

	int num_tasks = 0;
	float global_time = 0.0f;

	void run(Generator gen) {
		gen.exec();
	}

	void end() {
		num_tasks--;
		if (num_tasks <= 0) {
			num_tasks = 0;
			log.message("AL --> END all images in %.4f seconds (%d ms)\n\n", (clock() - global_time), (clock() - global_time) * 1000);
		}
	}	
};

		Generator asyncs[0];
		Generator gens[0];

		log.message("AL --> Begin on '%d' images\n\n", images.size());
		
		AsyncGenerator::num_tasks = images.size();
		AsyncGenerator::global_time = clock();

		foreach (string img; images) {
			Async async = new Async();
			Generator gen = new Generator(img);
			gen.setFinishCallback("AsyncGenerator::end");
			async.run("AsyncGenerator::run",gen);
			asyncs.append(async);
			gens.append(gen);
		}

Seems work only for the second image not the first, I have crash with an depth of instance is not zero.

 

Interpreter::runFunction(): depth of instance is not zero
		Grayscale image '3065890104549_1_UK.png' in 0.0030 seconds (2 ms)
		Square image '3065890104549_1_UK.png' in 0.0115 seconds (11 ms)
		Grayscale image '3065890104549_1_UK.png' in 0.0057 seconds (5 ms)
		Blur image '3065890104549_1_UK.png' in 0.0416 seconds (41 ms)

Unigine fatal error
/Users/aliot/Actisku/engine/software/source/engine/interpreter/Interpreter.cpp:511: throw(): unhandled exception: Machine::run(): "int: 0" is not a user class
Shutdown

I am not sure to understand rightly the Async class. It's possible to do this kind of work on image with Async ??

Thanks 

 

Tony

 

 

 

 

 

 

[ulf.schroeter]

Tony, I think no user class support yet. See this post for workaround

 

https://developer.unigine.com/forum/topic/2469-solved-truble-with-async-class/?p=13606

[anthony.liot]

Hi Ulf,

 

Thanks for the post you have right seems to be the trouble. 

 

Tony