Paul Davis
30b087ab3d
Generated by tools/f2s. Some hand-editing will be required in a few places to fix up comments related to timecode and video in order to keep the legible
72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
#ifndef AUDIOGRAPHER_ROUTINES_H
|
|
#define AUDIOGRAPHER_ROUTINES_H
|
|
|
|
#include "types.h"
|
|
|
|
#include <cmath>
|
|
|
|
#include "audiographer/visibility.h"
|
|
|
|
namespace AudioGrapher
|
|
{
|
|
|
|
/// Allows overriding some routines with more efficient ones.
|
|
class LIBAUDIOGRAPHER_API Routines
|
|
{
|
|
public:
|
|
typedef uint32_t uint_type;
|
|
|
|
typedef float (*compute_peak_t) (float const *, uint_type, float);
|
|
typedef void (*apply_gain_to_buffer_t) (float *, uint_type, float);
|
|
|
|
static void override_compute_peak (compute_peak_t func) { _compute_peak = func; }
|
|
static void override_apply_gain_to_buffer (apply_gain_to_buffer_t func) { _apply_gain_to_buffer = func; }
|
|
|
|
/** Computes peak in float buffer
|
|
* \n RT safe
|
|
* \param data buffer from which the peak is computed
|
|
* \param samples length of the portion of \a buffer that is checked
|
|
* \param current_peak current peak of buffer, if calculated in several passes
|
|
* \return maximum of values in [\a data, \a data + \a samples) and \a current_peak
|
|
*/
|
|
static inline float compute_peak (float const * data, uint_type samples, float current_peak)
|
|
{
|
|
return (*_compute_peak) (data, samples, current_peak);
|
|
}
|
|
|
|
/** Applies constant gain to buffer
|
|
* \n RT safe
|
|
* \param data data to which the gain is applied
|
|
* \param samples length of data
|
|
* \param gain gain that is applied
|
|
*/
|
|
static inline void apply_gain_to_buffer (float * data, uint_type samples, float gain)
|
|
{
|
|
(*_apply_gain_to_buffer) (data, samples, gain);
|
|
}
|
|
|
|
private:
|
|
static inline float default_compute_peak (float const * data, uint_type samples, float current_peak)
|
|
{
|
|
for (uint_type i = 0; i < samples; ++i) {
|
|
float abs = std::fabs(data[i]);
|
|
if (abs > current_peak) { current_peak = abs; }
|
|
}
|
|
return current_peak;
|
|
}
|
|
|
|
static inline void default_apply_gain_to_buffer (float * data, uint_type samples, float gain)
|
|
{
|
|
for (uint_type i = 0; i < samples; ++i) {
|
|
data[i] *= gain;
|
|
}
|
|
}
|
|
|
|
static compute_peak_t _compute_peak;
|
|
static apply_gain_to_buffer_t _apply_gain_to_buffer;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
#endif // AUDIOGRAPHER_ROUTINES_H
|