#ifndef AudioParam_h
#define AudioParam_h
#include "AudioContext.h"
#include "AudioParamTimeline.h"
#include "PlatformString.h"
#include <sys/types.h>
#include <wtf/Float32Array.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class AudioNodeOutput;
class AudioParam : public RefCounted<AudioParam> {
public:
static const double DefaultSmoothingConstant;
static const double SnapThreshold;
static PassRefPtr<AudioParam> create(const String& name, double defaultValue, double minValue, double maxValue, unsigned units = 0)
{
return adoptRef(new AudioParam(name, defaultValue, minValue, maxValue, units));
}
AudioParam(const String& name, double defaultValue, double minValue, double maxValue, unsigned units = 0)
: m_name(name)
, m_value(defaultValue)
, m_defaultValue(defaultValue)
, m_minValue(minValue)
, m_maxValue(maxValue)
, m_units(units)
, m_smoothedValue(defaultValue)
, m_smoothingConstant(DefaultSmoothingConstant)
, m_audioRateSignal(0)
{
}
void setContext(AudioContext* context) { m_context = context; }
AudioContext* context() { return m_context.get(); }
float value();
void setValue(float);
String name() const { return m_name; }
float minValue() const { return static_cast<float>(m_minValue); }
float maxValue() const { return static_cast<float>(m_maxValue); }
float defaultValue() const { return static_cast<float>(m_defaultValue); }
unsigned units() const { return m_units; }
float smoothedValue();
bool smooth();
void resetSmoothedValue() { m_smoothedValue = m_value; }
void setSmoothingConstant(double k) { m_smoothingConstant = k; }
void setValueAtTime(float value, float time) { m_timeline.setValueAtTime(value, time); }
void linearRampToValueAtTime(float value, float time) { m_timeline.linearRampToValueAtTime(value, time); }
void exponentialRampToValueAtTime(float value, float time) { m_timeline.exponentialRampToValueAtTime(value, time); }
void setTargetValueAtTime(float targetValue, float time, float timeConstant) { m_timeline.setTargetValueAtTime(targetValue, time, timeConstant); }
void setValueCurveAtTime(Float32Array* curve, float time, float duration) { m_timeline.setValueCurveAtTime(curve, time, duration); }
void cancelScheduledValues(float startTime) { m_timeline.cancelScheduledValues(startTime); }
bool hasSampleAccurateValues() { return m_timeline.hasValues() || m_audioRateSignal; }
void calculateSampleAccurateValues(float* values, unsigned numberOfValues);
void connect(AudioNodeOutput*);
void disconnect(AudioNodeOutput*);
private:
void calculateAudioRateSignalValues(float* values, unsigned numberOfValues);
void calculateTimelineValues(float* values, unsigned numberOfValues);
RefPtr<AudioContext> m_context;
String m_name;
double m_value;
double m_defaultValue;
double m_minValue;
double m_maxValue;
unsigned m_units;
double m_smoothedValue;
double m_smoothingConstant;
AudioParamTimeline m_timeline;
AudioNodeOutput* m_audioRateSignal;
};
}
#endif // AudioParam_h