path: root/rotord/rendercontext.cpp

#include "rotor.h"


using namespace Rotor;
void Render_context::runTask() {
	while (!isCancelled()) {
		int cmd=0;
		mutex.lock();
		if (work_queue.size()){
			cmd=work_queue[0];
			work_queue.pop_front();
		}
		mutex.unlock();
		if(cmd==ANALYSE_AUDIO) {
			state=ANALYSING_AUDIO;
			vector<Base_audio_processor*> processors;
			processors.push_back(audio_thumb);
			vector<Node*> analysers=graph.find_nodes("audio_analysis");
			for (auto a: analysers) {
				processors.push_back(dynamic_cast<Base_audio_processor*>(a));
			}
			if (load_audio(audio_filename,processors)) {
				audio_loaded=true;
				state=IDLE;
			}
			else {
				//an error occurred: TODO have to clean up allocated data. autoptr?
				audio_loaded=false;
				state=IDLE;
			}
		}
		if(cmd==RENDER) {
			state=RENDERING;
			if(graph.video_render(output_filename,audio_filename,output_framerate,progress)){
				state=IDLE;
			}
			else {
				//an error occurred: TODO have to clean up allocated data. autoptr?
				state=IDLE;
			}
		}
		sleep(100);
	}
	printf("Rotor: stopping thread\n");
}
void Render_context::add_queue(int item) {
	mutex.lock();
	work_queue.push_back(item);
	mutex.unlock();
}
Command_response Render_context::session_command(const std::vector<std::string>& command){
													//method,id,command1,{command2,}{body}
													//here we allow the controlling server to communicate with running tasks
	string ems="";
	for (auto i:command) ems=ems+i+":";

	cerr<<"Rotor: session command with "<<command.size()<<" arguments- "<<ems<<endl;

	Command_response response;
	response.status=HTTPResponse::HTTP_BAD_REQUEST;
	if (command[2]=="audio") {
	    if (command[0]=="PUT") {          			//get audio file location and initiate analysis
			if (command.size()>2) {
			    if (state==IDLE) {
					audio_filename=media_dir+command[3]; 			//for now, store session variables in memory									//check file exists
					Poco::File f=Poco::File(audio_filename);
					if (f.exists()) {
															//pass to worker thread ??if engine is ready?? ??what if engine has finished but results aren't read??
					    add_queue(ANALYSE_AUDIO);
					    response.status=HTTPResponse::HTTP_OK;
					    response.description="<status context='"+command[1]+"'>Starting audio analysis: "+command[3]+"</status>\n";
					}
					else {
					    response.status=HTTPResponse::HTTP_NOT_FOUND;
					    response.description="<status context='"+command[1]+"'>File "+command[3]+" not found</status>\n";
					}

			    }
			    else {
					response.status=HTTPResponse::HTTP_BAD_REQUEST;
					response.description="<status context='"+command[1]+"'>Rotor: session busy</status>\n";
			    }
			}
	    }
	     if (command[0]=="GET") {
		     if (state==ANALYSING_AUDIO) {
			     response.status=HTTPResponse::HTTP_OK;
			     response.description="<status context='"+command[1]+"'>Rotor: analysing audio</status>\n";
			     char c[20];
			     sprintf(c,"%02f",progress);
			     response.description+="<progress>"+string(c)+"</progress>\n";
		     }
			else if (audio_loaded) {
				//not sure about this-- should this state be retained?
				//can the data  only be read once?
				//for now
				response.status=HTTPResponse::HTTP_OK;
				response.description="<status context='"+command[1]+"'>Rotor: audio ready</status>\n";
				response.description+="<audio>\n";
				response.description+=audio_thumb->print();
				response.description+="</audio>";
			}
			else {
				response.status=HTTPResponse::HTTP_BAD_REQUEST;
				response.description="<status context='"+command[1]+"'>Rotor: no audio loaded</status>\n";
			}
	     }
	     if (command[0]=="DELETE") {
		     //for now
			audio_filename="";
			response.description="<status>1</status>\n";
			response.status=HTTPResponse::HTTP_OK;
	     }
	}
	if (command[2]=="graph") {
		if (command[0]=="GET") {
			if (graph.loaded) {
				response.status=HTTPResponse::HTTP_OK;
				response.description=graph.toString();
			}
			else {
				response.description="<status>Rotor: graph not loaded</status>\n";
			}
		}
		if (command[0]=="PUT") {     				//get new graph from file
			if (command.size()>2) {
													//should interrupt whatever is happening?
													//before begining to load from xml
				if (state==IDLE) {					//eventually not like this
					string graph_filename=graph_dir+command[3];
					Poco::File f=Poco::File(graph_filename);
					if (f.exists()) {
						if (graph.load(graph_filename)) {
							response.status=HTTPResponse::HTTP_OK;
							//response.description="<status context='"+command[1]+"'>Rotor: loaded graph "+command[3]+"</status>\n";
							response.description=graph.toString();
							//the graph could actually contain an xml object and we could just print it here?
							//or could our nodes even be subclassed from xml nodes?
							//the graph or the audio could load first- have to analyse the audio with vamp after the graph is loaded
							//for now the graph must load 1st
						}
						else {
							response.status=HTTPResponse::HTTP_INTERNAL_SERVER_ERROR; //~/sources/poco-1.4.6-all/Net/include/Poco/Net/HTTPResponse.h
							response.description="<status context='"+command[1]+"'>Rotor: could not load graph "+command[3]+"</status>\n";
						}
					}
					else {
					    response.status=HTTPResponse::HTTP_NOT_FOUND;
					    response.description="<status context='"+command[1]+"'>File "+command[3]+" not found</status>\n";
					}
				}
			}
		}
		if (command[0]=="DELETE") {
			 //for now
			graph=Graph();
			response.description="<status>1</status>\n";
			response.status=HTTPResponse::HTTP_OK;
		}
	}
	if (command[2]=="signal") {
		if (command[0]=="GET") {                                    	//generate xml from 1st signal output
			if (state==IDLE) {
				//direct call for testing
					float framerate=25.0f;
					if (command.size()>2) {
						framerate=ofToFloat(command[3]);
					}
					string signal_xml;
					if (graph.signal_render(signal_xml,framerate)){
						response.status=HTTPResponse::HTTP_OK;
						response.description=signal_xml;
					}
					else {
						response.status=HTTPResponse::HTTP_INTERNAL_SERVER_ERROR;
						response.description="<status context='"+command[1]+"'>Rotor: could not render output signal</status>\n";
					}
				}
				else {
					response.status=HTTPResponse::HTTP_NOT_FOUND;
					response.description="<status context='"+command[1]+"'>Signal output not found</status>\n";
				}
			}
			else {
				response.status=HTTPResponse::HTTP_SERVICE_UNAVAILABLE;
				response.description="<status context='"+command[1]+"'>Rotor: context busy</status>\n";
			}
		}
	if (command[2]=="video") {
		if (command[0]=="GET") {
													//DUMMY RESPONSE
			response.status=HTTPResponse::HTTP_OK;
			response.description="<status context='"+command[1]+"'>DUMMY RESPONSE Rotor: analysing video</status>\n";
			response.description+="<progress>45.2</progress>\n";
		}
		if (command[0]=="PUT") {                                    		//get vide file location and initiate analysis
			if (command.size()>4) { //there should be a filename + a destination node
			    if (state==IDLE) {
			    	string video_filename=media_dir+command[4];
													//check file exists
					Poco::File f=Poco::File(video_filename);
					if (f.exists()) {
						if (load_video(command[3],video_filename)) {
														//pass to worker thread ??if engine is ready?? ??what if engine has finished but results aren't read??
														//DUMMY RESPONSE
						response.description="<status context='"+command[1]+"'>Rotor: succesfully loaded "+command[4]+" into video node "+command[3]+"</status>\n";
						}
						else {
							response.status=HTTPResponse::HTTP_INTERNAL_SERVER_ERROR;
							response.description="<status context='"+command[1]+"'>Rotor: could not load "+command[4]+" into video node "+command[3]+"</status>\n";
						}
					}
					else {
					    response.status=HTTPResponse::HTTP_NOT_FOUND;
					    response.description="<status context='"+command[1]+"'>File '"+command[4]+"' not found</status>\n";
					}
			    }
			    else {
					response.status=HTTPResponse::HTTP_BAD_REQUEST;
					response.description="<status context='"+command[1]+"'>Rotor: session busy</status>\n";
			    }
			}
			else {
				response.status=HTTPResponse::HTTP_BAD_REQUEST;
				response.description="<status context='"+command[1]+"''>Rotor: bad request</status>\n";
			}
		}
		if (command[0]=="DELETE") {
		     //DUMMY RESPONSE
			response.description="<status context='"+command[1]+"''>DUMMY RESPONSE 1</status>\n";
			response.status=HTTPResponse::HTTP_OK;
	     }

	}
	if (command[2]=="render") {
		if (command[0]=="GET") {
													//DUMMY RESPONSE
			response.status=HTTPResponse::HTTP_OK;
			response.description="<status context='"+command[1]+"'>Rotor: rendering video</status>\n";
			response.description+="<progress>"+ofToString(progress)+"</progress>\n";
		}
		if (command[0]=="PUT") {
			if (command.size()>2) {
			    if (state==IDLE) {
						output_filename=output_dir+command[3];
						if (command.size()>3) {
//							output_framerate=ofToFloat(command[4]);
						}
					    add_queue(RENDER);
					    response.status=HTTPResponse::HTTP_OK;
					    response.description="<status context='"+command[1]+"'>Starting render: "+command[3]+"</status>\n";
			    }
			    else {
					response.status=HTTPResponse::HTTP_BAD_REQUEST;
					response.description="<status context='"+command[1]+"'>Rotor: session busy</status>\n";
		    	}
			}
			else {
				response.status=HTTPResponse::HTTP_BAD_REQUEST;
				response.description="<status context='"+command[1]+"'>Rotor: no output file specified</status>\n";
		    }
		}
		if (command[0]=="DELETE") {
													//DUMMY RESPONSE
													//SHOULD CHECK REQUIREMENTS
			response.status=HTTPResponse::HTTP_OK;
			response.description="<status context='"+command[1]+"'>DUMMY RESPONSE Rotor: cancelling render</status>\n";
		}
	}
	return response;
}


bool Render_context::load_audio(const string &filename,vector<Base_audio_processor*> processors){
	
	cerr<<"Rotor: starting audio analysis"<<endl;
	
	libav::audioloader loader;
	loader.setup(filename);

	graph.duration=((float)loader.formatContext->duration)/AV_TIME_BASE;

    int rate = loader.codecContext->sample_rate;
	int samples = ((loader.formatContext->duration + 5000)*rate)/AV_TIME_BASE; //why 5000 more?
	int channels= loader.codecContext->channels;
	int bits = loader.codecContext->bits_per_raw_sample;

	for (auto p: processors) {
		if(!p->init(channels,bits,samples,rate) ){
			cerr<<"Plugin failed to initialse"<<endl;
			return false;
		}
	}

	AVFrame* frame=loader.get_frame();
	int sample_processed=0;

	while (frame)
	{
		//now we can pass the data to the processor(s)
		for (auto p: processors) {
			p->process_frame(frame->data[0],frame->nb_samples);
		}
		sample_processed+=frame->nb_samples;
		//mutex.lock();
		progress=((float)sample_processed)/samples;
		//mutex.unlock();

		frame=loader.get_frame();
	}

	loader.close();

	for (auto p: processors) {
		p->cleanup();
		p->print_summary();
	}

	cerr<<"Rotor: finished audio analysis"<<endl;
}
bool Render_context::load_video(const string &nodeID,const string &filename){
	//this is a good standard example of how to find
	//a node of a specific type by ID and do something
	if (graph.nodes.find(nodeID)!=graph.nodes.end()){
		if (graph.nodes[nodeID]->type=="video_loader") {
			if (((Video_loader*)graph.nodes[nodeID])->load(filename)) {
				return true;
			}
		}
	}
	return false;
}