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Robotization.cpp
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Robotization.cpp
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/**
* @file
* @brief Source file for Robotization audio effect class
* @author
*
* @ref License
*/
/* LICENSE
*
* Copyright (c) 2008-2019 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Robotization.h"
#include "Exceptions.h"
using namespace openshot;
/// Blank constructor, useful when using Json to load the effect properties
Robotization::Robotization() : fft_size(FFT_SIZE_512), hop_size(HOP_SIZE_2), window_type(RECTANGULAR), stft(*this) {
// Init effect properties
init_effect_details();
}
// Default constructor
Robotization::Robotization(openshot::FFTSize new_fft_size, openshot::HopSize new_hop_size, openshot::WindowType new_window_type) :
fft_size(new_fft_size), hop_size(new_hop_size), window_type(new_window_type), stft(*this)
{
// Init effect properties
init_effect_details();
}
// Init effect settings
void Robotization::init_effect_details()
{
/// Initialize the values of the EffectInfo struct.
InitEffectInfo();
/// Set the effect info
info.class_name = "Robotization";
info.name = "Robotization";
info.description = "Transform the voice present in an audio track into a robotic voice effect.";
info.has_audio = true;
info.has_video = false;
}
// This method is required for all derived classes of EffectBase, and returns a
// modified openshot::Frame object
std::shared_ptr<openshot::Frame> Robotization::GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number)
{
const ScopedLock sl (lock);
ScopedNoDenormals noDenormals;
const int num_input_channels = frame->audio->getNumChannels();
const int num_output_channels = frame->audio->getNumChannels();
const int num_samples = frame->audio->getNumSamples();
const int hop_size_value = 1 << ((int)hop_size + 1);
const int fft_size_value = 1 << ((int)fft_size + 5);
stft.setup(num_output_channels);
stft.updateParameters((int)fft_size_value,
(int)hop_size_value,
(int)window_type);
stft.process(*frame->audio);
// return the modified frame
return frame;
}
void Robotization::RobotizationEffect::modification(const int channel)
{
fft->perform(time_domain_buffer, frequency_domain_buffer, false);
for (int index = 0; index < fft_size; ++index) {
float magnitude = abs(frequency_domain_buffer[index]);
frequency_domain_buffer[index].real(magnitude);
frequency_domain_buffer[index].imag(0.0f);
}
fft->perform(frequency_domain_buffer, time_domain_buffer, true);
}
// Generate JSON string of this object
std::string Robotization::Json() const {
// Return formatted string
return JsonValue().toStyledString();
}
// Generate Json::Value for this object
Json::Value Robotization::JsonValue() const {
// Create root json object
Json::Value root = EffectBase::JsonValue(); // get parent properties
root["type"] = info.class_name;
root["fft_size"] = fft_size;
root["hop_size"] = hop_size;
root["window_type"] = window_type;
// return JsonValue
return root;
}
// Load JSON string into this object
void Robotization::SetJson(const std::string value) {
// Parse JSON string into JSON objects
try
{
const Json::Value root = openshot::stringToJson(value);
// Set all values that match
SetJsonValue(root);
}
catch (const std::exception& e)
{
// Error parsing JSON (or missing keys)
throw InvalidJSON("JSON is invalid (missing keys or invalid data types)");
}
}
// Load Json::Value into this object
void Robotization::SetJsonValue(const Json::Value root) {
// Set parent data
EffectBase::SetJsonValue(root);
if (!root["fft_size"].isNull())
fft_size = (FFTSize)root["fft_size"].asInt();
if (!root["hop_size"].isNull())
hop_size = (HopSize)root["hop_size"].asInt();
if (!root["window_type"].isNull())
window_type = (WindowType)root["window_type"].asInt();
}
// Get all properties for a specific frame
std::string Robotization::PropertiesJSON(int64_t requested_frame) const {
// Generate JSON properties list
Json::Value root;
root["id"] = add_property_json("ID", 0.0, "string", Id(), NULL, -1, -1, true, requested_frame);
root["layer"] = add_property_json("Track", Layer(), "int", "", NULL, 0, 20, false, requested_frame);
root["start"] = add_property_json("Start", Start(), "float", "", NULL, 0, 1000 * 60 * 30, false, requested_frame);
root["end"] = add_property_json("End", End(), "float", "", NULL, 0, 1000 * 60 * 30, false, requested_frame);
root["duration"] = add_property_json("Duration", Duration(), "float", "", NULL, 0, 1000 * 60 * 30, true, requested_frame);
// Keyframes
root["fft_size"] = add_property_json("FFT Size", fft_size, "int", "", NULL, 0, 8, false, requested_frame);
root["hop_size"] = add_property_json("Hop Size", hop_size, "int", "", NULL, 0, 2, false, requested_frame);
root["window_type"] = add_property_json("Window Type", window_type, "int", "", NULL, 0, 3, false, requested_frame);
// Add fft_size choices (dropdown style)
root["fft_size"]["choices"].append(add_property_choice_json("128", FFT_SIZE_128, fft_size));
root["fft_size"]["choices"].append(add_property_choice_json("256", FFT_SIZE_256, fft_size));
root["fft_size"]["choices"].append(add_property_choice_json("512", FFT_SIZE_512, fft_size));
root["fft_size"]["choices"].append(add_property_choice_json("1024", FFT_SIZE_1024, fft_size));
root["fft_size"]["choices"].append(add_property_choice_json("2048", FFT_SIZE_2048, fft_size));
// Add hop_size choices (dropdown style)
root["hop_size"]["choices"].append(add_property_choice_json("1/2", HOP_SIZE_2, hop_size));
root["hop_size"]["choices"].append(add_property_choice_json("1/4", HOP_SIZE_4, hop_size));
root["hop_size"]["choices"].append(add_property_choice_json("1/8", HOP_SIZE_8, hop_size));
// Add window_type choices (dropdown style)
root["window_type"]["choices"].append(add_property_choice_json("Rectangular", RECTANGULAR, window_type));
root["window_type"]["choices"].append(add_property_choice_json("Bart Lett", BART_LETT, window_type));
root["window_type"]["choices"].append(add_property_choice_json("Hann", HANN, window_type));
root["window_type"]["choices"].append(add_property_choice_json("Hamming", HAMMING, window_type));
// Return formatted string
return root.toStyledString();
}