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#include "rotor.h"
//float equality
bool fequal(const float u,const float v){
if (abs(u-v)<.001) return true;
else return false;
};
using namespace Rotor;
Node_factory::Node_factory(){
//for now, statically load prototype map in constructor
add_type("audio_analysis",new Audio_analysis());
add_type("divide",new Signal_divide());
add_type("bang",new Is_new_integer());
add_type("signal_output",new Signal_output());
add_type("testcard",new Testcard());
add_type("video_output",new Video_output());
add_type("video_input",new Video_input());
}
bool Signal_input::connect(Signal_node* source) {
if (source->output_type=="signal") {
connection=(Node*)source;
return true;
}
else return false;
}
bool Image_input::connect(Image_node* source) {
if (source->output_type=="image") {
connection=(Node*)source;
return true;
}
else return false;
}
bool Signal_output::render(const float duration, const float framerate,string &xml_out){
//testing signal routes
cerr << "Rotor: Signal_output rendering " << duration << " seconds at " << framerate << " frames per second" << endl;
float step=1.0f/framerate;
float v=0.0f;
for (float f=0.0f;f<duration;f+=step) {
float u=get_output(Time_spec(f,framerate));
if (!fequal(u,v)) {
xml_out+=("<signal time='"+ofToString(f)+"'>"+ofToString(u)+"</signal>\n");
v=u;
}
}
return true;
}
bool Audio_thumbnailer::init(int _channels,int _bits,int _samples,int _rate) {
//base_audio_processor::init(_channels,_bits,_samples);
channels=_channels;
bits=_bits;
samples=_samples;
samples_per_column=samples/width;
column=0; //point thumbnail bitmap
out_sample=0; //sample in whole track
offset=0x1<<(bits-1); //signed audio
scale=1.0/offset;
sample=0;
samples=0;
accum=0.0;
return true;
}
int Audio_thumbnailer::process_frame(uint8_t *_data,int samples_in_frame){
//begin by processing remaining samples
//samples per column could be larger than a frame! (probably is)
//but all we are doing is averaging
int bytes=(bits>>3);
int stride=channels*bytes;
int in_sample=0;
while (in_sample<samples_in_frame&&column<width) {
//continue the column
while (sample<samples_per_column&&in_sample<samples_in_frame) {
//accumulate samples for this column until we run out of samples
for (int i=0;i<channels;i++) {
unsigned int this_val=0;
for (int j=0;j<bytes;j++) {
this_val+=_data[(in_sample*stride)+(i*bytes)+j]<<(j*8);
}
//convert from integer data format - i.e s16p - to audio signal in -1..1 range
//presume 16 bits for now...
double val=((double)((int16_t)this_val))*scale;
accum+=val*val;
samples++;
}
in_sample++;
sample++;
out_sample++;
}
if (sample==samples_per_column) { //finished a column
//get root-mean
double mean=pow(accum/samples,0.5);
//if (column==0) {
// cerr << "first column total: "<< accum << " in " << samples << " samples, average " << (accum/samples)<<endl;
//}
int colheight=height*mean*0.5;
int hh=height>>1;
for (int i=0;i<height;i++) {
data[i*width+column]=abs(i-hh)<colheight?0xff:0x00;
}
column++;
sample=0;
samples=0;
accum=0.0;
}
}
return out_sample;
}
string Audio_thumbnailer::print(){
//base64 encode the image data output it
stringstream output;
Poco::Base64Encoder *enc=new Poco::Base64Encoder(output);
enc->write(data,width*height);
//tring output;
/*
for (int j=0;j<height;j++) {
for (int i=0;i<width;i++) {
output+=data[j*width+i]<0x7f?"0":"1";
}
output +="\n";
}
*/
enc->close();
delete enc;
return output.str();
}
bool Audio_analysis::init(int _channels,int _bits,int _samples, int _rate) {
//need these to make sense of data
channels=_channels;
bits=_bits;
samples=_samples;
return analyser.init(soname,id,_channels,_bits,_samples,_rate);
//attempt to load vamp plugin and prepare to receive frames of data
//should the audio analysis contain a vamphost or should it inherit?
//maybe neater to contain it in terms of headers etc
}
int Audio_analysis::process_frame(uint8_t *data,int samples_in_frame) {
analyser.process_frame(data,samples_in_frame);
return 1;
}
void Audio_analysis::cleanup() {
analyser.cleanup();
//print_features();
}
void Audio_analysis::print_features(){
for (auto i: analyser.features) {
cerr<<i.second<<" "<<i.first<<endl;
}
}
bool Video_output::render(const float duration, const float framerate,const string &output_filename,const string &audio_filename){
//
//setup defaults
int outW=640;
int outH=480;
int bitRate=4000000;
int frameRate=25;
AVCodecID codecId=AV_CODEC_ID_MPEG4;
std::string container ="mov";
std::string input ="01.mp3";
bool usingaudio=audioloader.setup(input);
if (exporter->setup(outW,outH,bitRate,frameRate,container)) { //codecId,
if (exporter->record(output_filename)) {
cerr << "Rotor: Video_output rendering " << duration << " seconds at " << framerate << " fps" << endl;
float step=1.0f/framerate;
float v=0.0f;
for (float f=0.0f;f<duration;f+=step) {
if (!exporter->encodeFrame(get_output(Frame_spec(f,framerate,outW,outH))->RGBdata,audioloader.get_samples(exporter->get_audio_framesize()))){
//if (!exporter->encodeFrame(get_output(Frame_spec(f,framerate,outW,outH))->RGBdata,audioloader.get_packet())){
cerr << "Rotor: video output failed"<<endl;
break;
}
}
exporter->finishRecord();
cerr << "Rotor: Video_output finished "<< endl;
return true;
}
}
return false;
}
bool Video_input::load(const string &filename){
if (player->loadMovie(filename)){
player->play();
player->setPaused(true);
cerr<<"loaded "<<filename<<", "<<player->getDuration()<<" seconds "<<", "<<player->getWidth()<<"x"<<player->getWidth()<<endl;
return true;
}
return false;
}
Image* Video_input::get_output(const Frame_spec &frame){
//wonder about the actual mechanism used by gstreamer
//have to implment callback when seek is ready?
//presume gstreamer caches a loaded frame?
//if (player->isLoaded()){
// image.setup(player)
//}
return nullptr;
};
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