<?php

ini_set('display_startup_errors', 1);
ini_set('display_errors', 1);
error_reporting(-1);

ini_set("display_errors", "On");
// requires php5
define('UPLOAD_DIR', '../uploads/5/');
define('DISTORT_DIR', 'python-audio-effects/');
$img = $_POST['base64'];
$img = str_replace('data:audio/mp3;base64,', '', $img);
$img = str_replace(' ', '+', $img);
$data = base64_decode($img);
#$file = UPLOAD_DIR . uniqid() . '.mp3';
$file = UPLOAD_DIR . $_POST['name'] . '_'.$_POST['type'] .'.mp3';
// $file = DISTORT_DIR . $_POST['name'] . '_'.$_POST['type'] .'.mp3';
$success = file_put_contents($file, $data);
$wavfile = $file.'.wav';
$distortedfile = $wavfile.'.wav';
$distortedfile1 = $wavfile.'.1.wav';
$distortedfile2 = $wavfile.'.2.wav';
$distortedfile3 = $wavfile.'.3.wav';


shell_exec('ffmpeg -i "'.$file.'" "'.$wavfile.'"');

if ($_POST['type']=='echo'){
	// echo
	$command = '/home/lain/virtualenvs/radioactive/bin/python3 python-audio-effects/echo.py "'.$wavfile.'" "'.$distortedfile.'"';
	$output=shell_exec($command);
	print $output;
} 
elseif ($_POST['type']=='lowpass'){
	// lowpass
	$command = '/home/lain/virtualenvs/radioactive/bin/python3 python-audio-effects/lowpass.py "'.$wavfile.'" "'.$distortedfile.'"';
	$output=shell_exec($command);
	print $output;
}

elseif ($_POST['type']=='lowpitch'){

// lowpitch
$command = '/home/lain/virtualenvs/radioactive/bin/python3 python-audio-effects/lowpitch.py "'.$wavfile.'" "'.$distortedfile.'"';
$output=shell_exec($command);
print $output;
}

else {
	// collective
	$command = '/home/lain/virtualenvs/radioactive/bin/python3 python-audio-effects/echo.py "'.$wavfile.'" "'.$distortedfile1.'"';
	$output=shell_exec($command);
	print $output;
	$command = '/home/lain/virtualenvs/radioactive/bin/python3 python-audio-effects/lowpass.py "'.$wavfile.'" "'.$distortedfile2.'"';
	$output=shell_exec($command);
	print $output;
	$command = '/home/lain/virtualenvs/radioactive/bin/python3 python-audio-effects/lowpitch.py "'.$wavfile.'" "'.$distortedfile3.'"';
	$output=shell_exec($command);
	print $output;

	shell_exec('ffmpeg -i "'.$wavfile.'" -i "'.$distortedfile1.'" -i "'.$distortedfile2.'" -i "'.$distortedfile3.'" -filter_complex amix=inputs=4:duration=longest "'.$distortedfile.'"');
}


# make a database of recordings
$item=array('name'=>$_POST['name'],'type'=>$_POST['type'],'date'=>date("d/m/Y"), 'file'=>$distortedfile);
$handle=fopen('../uploads/5/index.jsons','a');
fwrite($handle,json_encode($item)."\n");
fclose($handle);
print $success ? $distortedfile : 'Unable to save the file.';
?>