🛠️🐜 Antkeeper superbuild with dependencies included
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
3.1 KiB
120 lines
3.1 KiB
#ifndef MAKEMHR_H
|
|
#define MAKEMHR_H
|
|
|
|
#include <vector>
|
|
#include <complex>
|
|
|
|
#include "polyphase_resampler.h"
|
|
|
|
|
|
// The maximum path length used when processing filenames.
|
|
#define MAX_PATH_LEN (256)
|
|
|
|
// The limit to the number of 'distances' listed in the data set definition.
|
|
// Must be less than 256
|
|
#define MAX_FD_COUNT (16)
|
|
|
|
// The limits to the number of 'elevations' listed in the data set definition.
|
|
// Must be less than 256.
|
|
#define MIN_EV_COUNT (5)
|
|
#define MAX_EV_COUNT (181)
|
|
|
|
// The limits for each of the 'azimuths' listed in the data set definition.
|
|
// Must be less than 256.
|
|
#define MIN_AZ_COUNT (1)
|
|
#define MAX_AZ_COUNT (255)
|
|
|
|
// The limits for the 'distance' from source to listener for each field in
|
|
// the definition file.
|
|
#define MIN_DISTANCE (0.05)
|
|
#define MAX_DISTANCE (2.50)
|
|
|
|
// The limits for the sample 'rate' metric in the data set definition and for
|
|
// resampling.
|
|
#define MIN_RATE (32000)
|
|
#define MAX_RATE (96000)
|
|
|
|
// The limits for the HRIR 'points' metric in the data set definition.
|
|
#define MIN_POINTS (16)
|
|
#define MAX_POINTS (8192)
|
|
|
|
|
|
using uint = unsigned int;
|
|
|
|
/* Complex double type. */
|
|
using complex_d = std::complex<double>;
|
|
|
|
|
|
enum ChannelModeT : bool {
|
|
CM_AllowStereo = false,
|
|
CM_ForceMono = true
|
|
};
|
|
|
|
// Sample and channel type enum values.
|
|
enum SampleTypeT {
|
|
ST_S16 = 0,
|
|
ST_S24 = 1
|
|
};
|
|
|
|
// Certain iterations rely on these integer enum values.
|
|
enum ChannelTypeT {
|
|
CT_NONE = -1,
|
|
CT_MONO = 0,
|
|
CT_STEREO = 1
|
|
};
|
|
|
|
// Structured HRIR storage for stereo azimuth pairs, elevations, and fields.
|
|
struct HrirAzT {
|
|
double mAzimuth{0.0};
|
|
uint mIndex{0u};
|
|
double mDelays[2]{0.0, 0.0};
|
|
double *mIrs[2]{nullptr, nullptr};
|
|
};
|
|
|
|
struct HrirEvT {
|
|
double mElevation{0.0};
|
|
uint mIrCount{0u};
|
|
uint mAzCount{0u};
|
|
HrirAzT *mAzs{nullptr};
|
|
};
|
|
|
|
struct HrirFdT {
|
|
double mDistance{0.0};
|
|
uint mIrCount{0u};
|
|
uint mEvCount{0u};
|
|
uint mEvStart{0u};
|
|
HrirEvT *mEvs{nullptr};
|
|
};
|
|
|
|
// The HRIR metrics and data set used when loading, processing, and storing
|
|
// the resulting HRTF.
|
|
struct HrirDataT {
|
|
uint mIrRate{0u};
|
|
SampleTypeT mSampleType{ST_S24};
|
|
ChannelTypeT mChannelType{CT_NONE};
|
|
uint mIrPoints{0u};
|
|
uint mFftSize{0u};
|
|
uint mIrSize{0u};
|
|
double mRadius{0.0};
|
|
uint mIrCount{0u};
|
|
uint mFdCount{0u};
|
|
|
|
std::vector<double> mHrirsBase;
|
|
std::vector<HrirEvT> mEvsBase;
|
|
std::vector<HrirAzT> mAzsBase;
|
|
|
|
std::vector<HrirFdT> mFds;
|
|
};
|
|
|
|
|
|
int PrepareHrirData(const uint fdCount, const double (&distances)[MAX_FD_COUNT], const uint (&evCounts)[MAX_FD_COUNT], const uint azCounts[MAX_FD_COUNT * MAX_EV_COUNT], HrirDataT *hData);
|
|
void MagnitudeResponse(const uint n, const complex_d *in, double *out);
|
|
void FftForward(const uint n, complex_d *inout);
|
|
void FftInverse(const uint n, complex_d *inout);
|
|
|
|
|
|
// Performs linear interpolation.
|
|
inline double Lerp(const double a, const double b, const double f)
|
|
{ return a + f * (b - a); }
|
|
|
|
#endif /* MAKEMHR_H */
|