37 Expander::Expander() : threshold(-10), ratio(1), attack(1), release(1), makeup_gain(1), bypass(false) {
39 init_effect_details();
44 threshold(new_threshold), ratio(new_ratio), attack(new_attack), release(new_release), makeup_gain(new_makeup_gain), bypass(new_bypass)
47 init_effect_details();
51 void Expander::init_effect_details()
59 info.
description =
"Louder parts of audio becomes relatively louder and quieter parts becomes quieter.";
71 std::shared_ptr<openshot::Frame>
Expander::GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number)
74 const int num_input_channels = frame->audio->getNumChannels();
75 const int num_output_channels = frame->audio->getNumChannels();
76 const int num_samples = frame->audio->getNumSamples();
87 for (
int channel = 0; channel < num_input_channels; ++channel)
88 mixed_down_input.addFrom(0, 0, *frame->audio, channel, 0, num_samples, 1.0f / num_input_channels);
90 for (
int sample = 0; sample < num_samples; ++sample) {
98 const float average_factor = 0.9999f;
106 yg = T + (
xg - T) * R;
116 control = powf (10.0f, (gain -
yl) * 0.05f);
119 for (
int channel = 0; channel < num_input_channels; ++channel) {
120 float new_value = frame->audio->getSample(channel, sample)*
control;
121 frame->audio->setSample(channel, sample, new_value);
125 for (
int channel = num_input_channels; channel < num_output_channels; ++channel)
126 frame->audio->clear(channel, 0, num_samples);
174 catch (
const std::exception& e)
177 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)");
188 if (!root[
"threshold"].isNull())
191 if (!root[
"ratio"].isNull())
194 if (!root[
"attack"].isNull())
197 if (!root[
"release"].isNull())
200 if (!root[
"makeup_gain"].isNull())
203 if (!root[
"bypass"].isNull())
212 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
214 root[
"start"] =
add_property_json(
"Start",
Start(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
215 root[
"end"] =
add_property_json(
"End",
End(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
216 root[
"duration"] =
add_property_json(
"Duration",
Duration(),
"float",
"", NULL, 0, 1000 * 60 * 30,
true, requested_frame);
227 return root.toStyledString();
Header file for all Exception classes.
Header file for Expander audio effect class.
float End() const
Get end position (in seconds) of clip (trim end of video)
float Start() const
Get start position (in seconds) of clip (trim start of video)
float Duration() const
Get the length of this clip (in seconds)
std::string Id() const
Get the Id of this clip object.
int Layer() const
Get layer of clip on timeline (lower number is covered by higher numbers)
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.
virtual Json::Value JsonValue() const
Generate Json::Value for this object.
virtual void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
EffectInfoStruct info
Information about the current effect.
Expander()
Blank constructor, useful when using Json to load the effect properties.
float inverse_sample_rate
std::string PropertiesJSON(int64_t requested_frame) const override
void SetJsonValue(const Json::Value root) override
Load Json::Value into this object.
float calculateAttackOrRelease(float value)
void SetJson(const std::string value) override
Load JSON string into this object.
juce::AudioSampleBuffer mixed_down_input
Json::Value JsonValue() const override
Generate Json::Value for this object.
std::string Json() const override
Generate JSON string of this object.
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...
Exception for invalid JSON.
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
double GetValue(int64_t index) const
Get the value at a specific index.
Json::Value JsonValue() const
Generate Json::Value for this object.
This namespace is the default namespace for all code in the openshot library.
const Json::Value stringToJson(const std::string value)
bool has_video
Determines if this effect manipulates the image of a frame.
bool has_audio
Determines if this effect manipulates the audio of a frame.
std::string class_name
The class name of the effect.
std::string name
The name of the effect.
std::string description
The description of this effect and what it does.