23 init_effect_details();
27 void Delay::init_effect_details()
35 info.
description =
"Adjust the synchronism between the audio and video track.";
45 const float max_delay_time = 5;
61 std::shared_ptr<openshot::Frame>
Delay::GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number)
63 const float delay_time_value = (float)
delay_time.
GetValue(frame_number)*(float)frame->SampleRate();
64 int local_write_position;
68 for (
int channel = 0; channel < frame->audio->getNumChannels(); channel++)
70 float *channel_data = frame->audio->getWritePointer(channel);
71 float *delay_data =
delay_buffer.getWritePointer(channel);
74 for (
auto sample = 0; sample < frame->audio->getNumSamples(); ++sample)
76 const float in = (float)(channel_data[sample]);
79 float read_position = fmodf((
float)local_write_position - delay_time_value + (
float)
delay_buffer_samples, delay_buffer_samples);
80 int local_read_position = floorf(read_position);
82 if (local_read_position != local_write_position)
84 float fraction = read_position - (float)local_read_position;
85 float delayed1 = delay_data[(local_read_position + 0)];
86 float delayed2 = delay_data[(local_read_position + 1) % delay_buffer_samples];
87 out = (float)(delayed1 + fraction * (delayed2 - delayed1));
89 channel_data[sample] = in + (out - in);
90 delay_data[local_write_position] = in;
93 if (++local_write_position >= delay_buffer_samples)
133 catch (
const std::exception& e)
136 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)");
147 if (!root[
"delay_time"].isNull())
156 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
158 root[
"start"] =
add_property_json(
"Start",
Start(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
159 root[
"end"] =
add_property_json(
"End",
End(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
160 root[
"duration"] =
add_property_json(
"Duration",
Duration(),
"float",
"", NULL, 0, 1000 * 60 * 30,
true, requested_frame);
166 return root.toStyledString();
void SetJson(const std::string value) override
Load JSON string into this object.
std::string Json() const override
Generate JSON string of this object.
std::string Id() const
Get the Id of this clip object.
float Start() const
Get start position (in seconds) of clip (trim start of video)
virtual void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
virtual float End() const
Get end position (in seconds) of clip (trim end of video)
std::string PropertiesJSON(int64_t requested_frame) const override
const Json::Value stringToJson(const std::string value)
virtual Json::Value JsonValue() const
Generate Json::Value for this object.
Delay()
Default constructor.
Json::Value JsonValue() const override
Generate Json::Value for this object.
bool has_audio
Determines if this effect manipulates the audio of a frame.
Header file for all Exception classes.
Header file for Frame class.
void setup(std::shared_ptr< openshot::Frame > frame)
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...
int delay_buffer_channels
Header file for Delay audio effect class.
std::string class_name
The class name of the effect.
std::string name
The name of the effect.
float Duration() const
Get the length of this clip (in seconds)
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
juce::AudioBuffer< float > delay_buffer
This namespace is the default namespace for all code in the openshot library.
Json::Value JsonValue() const
Generate Json::Value for this object.
std::string description
The description of this effect and what it does.
bool has_video
Determines if this effect manipulates the image of a frame.
Exception for invalid JSON.
double GetValue(int64_t index) const
Get the value at a specific index.
This class adds a delay into the audio.
A Keyframe is a collection of Point instances, which is used to vary a number or property over time...
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.
int Layer() const
Get layer of clip on timeline (lower number is covered by higher numbers)
EffectInfoStruct info
Information about the current effect.
void SetJsonValue(const Json::Value root) override
Load Json::Value into this object.