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Noise.cpp
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// Copyright (c) 2008-2019 OpenShot Studios, LLC
//
// SPDX-License-Identifier: LGPL-3.0-or-later
#include "Noise.h"
#include "Exceptions.h"
#include "Frame.h"
#include <AppConfig.h>
#include <juce_audio_basics/juce_audio_basics.h>
using namespace openshot;
Noise::Noise(): Noise::Noise(30) { }
Noise::Noise(Keyframe level) : level(level)
{
// Init effect properties
init_effect_details();
}
// Init effect settings
void Noise::init_effect_details()
{
InitEffectInfo();
info.class_name = "Noise";
info.name = "Noise";
info.description = "Random signal having equal intensity at different frequencies.";
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> Noise::GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number)
{
// Adding Noise
srand ( time(NULL) );
int noise = level.GetValue(frame_number);
for (int channel = 0; channel < frame->audio->getNumChannels(); channel++)
{
auto *buffer = frame->audio->getWritePointer(channel);
for (auto sample = 0; sample < frame->audio->getNumSamples(); ++sample)
{
buffer[sample] = buffer[sample]*(1 - (1+(float)noise)/100) + buffer[sample]*0.0001*(rand()%100+1)*noise;
}
}
// return the modified frame
return frame;
}
// Generate JSON string of this object
std::string Noise::Json() const {
// Return formatted string
return JsonValue().toStyledString();
}
// Generate Json::Value for this object
Json::Value Noise::JsonValue() const {
// Create root json object
Json::Value root = EffectBase::JsonValue(); // get parent properties
root["type"] = info.class_name;
root["level"] = level.JsonValue();
// return JsonValue
return root;
}
// Load JSON string into this object
void Noise::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 Noise::SetJsonValue(const Json::Value root) {
// Set parent data
EffectBase::SetJsonValue(root);
// Set data from Json (if key is found)
if (!root["level"].isNull())
level.SetJsonValue(root["level"]);
}
// Get all properties for a specific frame
std::string Noise::PropertiesJSON(int64_t requested_frame) const {
// Generate JSON properties list
Json::Value root = BasePropertiesJSON(requested_frame);
// Keyframes
root["level"] = add_property_json("Level", level.GetValue(requested_frame), "int", "", &level, 0, 100, false, requested_frame);
// Return formatted string
return root.toStyledString();
}
Exceptions.h
Header file for all Exception classes.
Frame.h
Header file for Frame class.
Noise.h
Header file for Noise audio effect class.
openshot::ClipBase::add_property_json
Json::Value add_property_json(std::string name, float value, std::string type, std::string memo, const Keyframe *keyframe, float min_value, float max_value, bool readonly, int64_t requested_frame) const
Generate JSON for a property.
Definition ClipBase.cpp:96
openshot::EffectBase::JsonValue
virtual Json::Value JsonValue() const
Generate Json::Value for this object.
Definition EffectBase.cpp:79
openshot::EffectBase::InitEffectInfo
void InitEffectInfo()
Definition EffectBase.cpp:24
openshot::EffectBase::BasePropertiesJSON
Json::Value BasePropertiesJSON(int64_t requested_frame) const
Generate JSON object of base properties (recommended to be used by all effects).
Definition EffectBase.cpp:179
openshot::EffectBase::SetJsonValue
virtual void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
Definition EffectBase.cpp:115
openshot::EffectBase::info
EffectInfoStruct info
Information about the current effect.
Definition EffectBase.h:69
openshot::InvalidJSON
Exception for invalid JSON.
Definition Exceptions.h:218
openshot::Keyframe
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
Definition KeyFrame.h:53
openshot::Noise::GetFrame
std::shared_ptr< openshot::Frame > GetFrame(int64_t frame_number) override
This method is required for all derived classes of ClipBase, and returns a new openshot::Frame object...
Definition Noise.h:52
openshot::Noise::SetJson
void SetJson(const std::string value) override
Load JSON string into this object.
Definition Noise.cpp:87
openshot::Noise::JsonValue
Json::Value JsonValue() const override
Generate Json::Value for this object.
Definition Noise.cpp:75
openshot::Noise::Json
std::string Json() const override
Generate JSON string of this object.
Definition Noise.cpp:68
openshot::Noise::PropertiesJSON
std::string PropertiesJSON(int64_t requested_frame) const override
Definition Noise.cpp:115
openshot::Noise::SetJsonValue
void SetJsonValue(const Json::Value root) override
Load Json::Value into this object.
Definition Noise.cpp:104
openshot::Noise::Noise
Noise()
Default constructor.
Definition Noise.cpp:22
openshot::Noise::level
Keyframe level
Noise level keyframe. The amount of noise inserted on the audio.
Definition Noise.h:42
openshot
This namespace is the default namespace for all code in the openshot library.
Definition Compressor.h:29
openshot::stringToJson
const Json::Value stringToJson(const std::string value)
Definition Json.cpp:16
openshot::EffectInfoStruct::has_video
bool has_video
Determines if this effect manipulates the image of a frame.
Definition EffectBase.h:40
openshot::EffectInfoStruct::has_audio
bool has_audio
Determines if this effect manipulates the audio of a frame.
Definition EffectBase.h:41
openshot::EffectInfoStruct::class_name
std::string class_name
The class name of the effect.
Definition EffectBase.h:36
openshot::EffectInfoStruct::name
std::string name
The name of the effect.
Definition EffectBase.h:37
openshot::EffectInfoStruct::description
std::string description
The description of this effect and what it does.
Definition EffectBase.h:38