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#ifndef ROTOR_NODES_AUDIO_ANALYSIS
#define ROTOR_NODES_AUDIO_ANALYSIS
#include "rotor.h"
#include "vampHost.h"
namespace Rotor {
#define VAMPHOST_Timeline 1
#define VAMPHOST_Timesteps 2
#define VAMPHOST_Valueline 3
#define VAMPHOST_Values 4
class Vamp_node: public Audio_processor {
//base class for vamp plugin hosts
public:
Vamp_node(){
create_attribute("mode","Data output mode","Mode","timeline",{"timeline","timesteps","valueline","values"});
};
bool init(int _channels,int _bits,int _samples,int _rate);
void cleanup();
int process_frame(uint8_t *data,int samples_in_frame);
const float output(const Time_spec &time) {
if (analyser.features.size()) {
auto i=analyser.features.upper_bound(time.time); //the first element in the container whose key is considered to go after k
if (i!=analyser.features.end()){
float uk=i->first;
float v1,v2;
v1=v2=0.0f;
if (i->second.values.size()) v2=i->second.values[0];
i--;
float lk=i->first;
int ln=i->second.number;
if (i->second.values.size()) v1=i->second.values[0];
int m=attributes["mode"]->intVal;
//
switch (attributes["mode"]->intVal){
case VAMPHOST_Timeline:
return (((time.time-lk)/(uk-lk))+ln);
case VAMPHOST_Timesteps:
return (float)ln;
case VAMPHOST_Valueline:
return ((((time.time-lk)/(uk-lk))*(v2-v1))+v1);
case VAMPHOST_Values:
return v1;
}
}
}
return 0.0f;
}
string get_features();
void print_summary(){
cerr<<"vamp plugin "<<id<<" of library "<<soname<<" found "<<analyser.features.size()<<" features "<<endl;
};
protected:
string soname,id;
int outputNo;
vampHost::Analyser analyser;
private:
//??
map <string,float> params;
};
class Audio_analysis: public Vamp_node {
//vamp node that allows the user to choose a plugin
public:
Audio_analysis(){
//create_attribute("soname","Plugin library to use","Plugin library","vamp-example-plugins",{"horiz","vert","horizR","vertR"});
//create_attribute("id","ID of Plugin to use","Plugin ID","percussiononsets",{"horiz","vert","horizR","vertR"});
create_attribute("analyser","Analyser Plugin to use","Analyser plugin","barbeattracker",{"barbeattracker","segmenter"});
create_parameter("outputNo","number","Plugin output to use","Output number",0.0f);
title="Audio analysis";
description="Analyse audio and output";
};
Audio_analysis(map<string,string> &settings):Audio_analysis() {
base_settings(settings);
soname=find_setting(settings,"soname");
id=find_setting(settings,"id");
outputNo=find_setting(settings,"outputNo",0);
};
~Audio_analysis(){};
Audio_analysis* clone(map<string,string> &_settings) { return new Audio_analysis(_settings);};
private:
};
class Act_segmenter: public Vamp_node {
//vamp node that applies a ruleset to manage a set of acts via a cycler
public:
Act_segmenter(){
create_parameter("outputNo","number","Plugin output to use","Output number",0.0f);
create_parameter("acts","number","Number of acts defined","Acts",1.0f);
title="Act manager";
description="Applies a ruleset to manage acts based on segments";
};
Act_segmenter(map<string,string> &settings):Act_segmenter() {
base_settings(settings);
soname="qm-vamp-plugins";
id="qm-segmenter";
outputNo=find_setting(settings,"outputNo",0);
};
~Act_segmenter(){};
Act_segmenter* clone(map<string,string> &_settings) { return new Act_segmenter(_settings);};
void cleanup(){
Vamp_node::cleanup();
map<float,vampHost::feature> acts; //temporary storage for new set of features
vector<int> act_count;
for (int i=0;i<(int)parameters["acts"]->value;i++) act_count.push_back(0);
map<float,int> durations; //list of segment durations
int i=0;
for (map<float,vampHost::feature>::iterator f=analyser.features.begin();f!=analyser.features.end();++f){
auto g=f;
if (++g!=analyser.features.end()){
durations[g->first-f->first]=i;
}
i++;
}
//distribute acts amongst segments;
if (analyser.features.size()==(int)parameters["acts"]->value+1){
for (auto f: analyser.features){
acts[f.first]=f.second;
}
}
else if (analyser.features.size()<(int)parameters["acts"]->value+1){
//iteratively split segments and refresh durations
//this could work well on the original data
//pick the longest and split it in two
//refresh durations - this can be a function
//keep going
//finally copy out
}
else { //there are extra segments to assign to acts
//assign act numbers to segments
//work through the segments
//have a list of segments that are to be filled
//start at the ends and work inwards
//have a list of how many times each segment has been used
//start with a set of the segments numbers
//(the aim: to access the segment numbers by the time that they start)
map<float,vampHost::feature> segments=analyser.features;
segments.erase(--segments.end());
//assign the acts from the beginning and end in towards the middle
bool take_start=true;
while (segments.size()){
int act=-1;
vampHost::feature f;
float t;
if (take_start){
f=(*segments.begin()).second;
t=(*segments.begin()).first;
segments.erase(segments.begin());
for (int i=0;i<(int)parameters["acts"]->value-1;i++) {
if (act_count[i]==0||(act_count[i+1]>act_count[i]&&act_count[i]<i)) {
act=i;
break;
}
}
}
else {
f=(*--segments.end()).second;
t=(*--segments.end()).first;
segments.erase(--segments.end());
for (int i=(int)parameters["acts"]->value-1;i>0;i--) {
if (act_count[i]==0||(act_count[i-1]>act_count[i]&&act_count[i]<(int)parameters["acts"]->value-i)) {
act=i;
break;
}
}
}
if (act==-1){ //all slots are filled equally
act=(int)parameters["acts"]->value/2;
}
act_count[act]++;
f.number=act;
acts[t]=f;
take_start=!take_start;
}
}
//add last item back on
acts[(*--analyser.features.end()).first]=analyser.features[(*--analyser.features.end()).first];
analyser.features=acts;
}
private:
};
}
#endif
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