145 lines
5.3 KiB
C++
145 lines
5.3 KiB
C++
/**************************************************************************/
|
|
/* audio_frame.h */
|
|
/**************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/**************************************************************************/
|
|
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
|
|
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/**************************************************************************/
|
|
|
|
#ifndef AUDIO_FRAME_H
|
|
#define AUDIO_FRAME_H
|
|
|
|
#include "core/math/vector2.h"
|
|
#include "core/typedefs.h"
|
|
|
|
static inline float undenormalise(volatile float f) {
|
|
union {
|
|
uint32_t i;
|
|
float f;
|
|
} v;
|
|
|
|
v.f = f;
|
|
|
|
// original: return (v.i & 0x7f800000) == 0 ? 0.0f : f;
|
|
// version from Tim Blechmann:
|
|
return (v.i & 0x7f800000) < 0x08000000 ? 0.0f : f;
|
|
}
|
|
|
|
static const float AUDIO_PEAK_OFFSET = 0.0000000001f;
|
|
static const float AUDIO_MIN_PEAK_DB = -200.0f; // linear2db(AUDIO_PEAK_OFFSET)
|
|
|
|
struct AudioFrame {
|
|
//left and right samples
|
|
float l = 0.f, r = 0.f;
|
|
|
|
_ALWAYS_INLINE_ const float &operator[](int idx) const { return idx == 0 ? l : r; }
|
|
_ALWAYS_INLINE_ float &operator[](int idx) { return idx == 0 ? l : r; }
|
|
|
|
_ALWAYS_INLINE_ AudioFrame operator+(const AudioFrame &p_frame) const { return AudioFrame(l + p_frame.l, r + p_frame.r); }
|
|
_ALWAYS_INLINE_ AudioFrame operator-(const AudioFrame &p_frame) const { return AudioFrame(l - p_frame.l, r - p_frame.r); }
|
|
_ALWAYS_INLINE_ AudioFrame operator*(const AudioFrame &p_frame) const { return AudioFrame(l * p_frame.l, r * p_frame.r); }
|
|
_ALWAYS_INLINE_ AudioFrame operator/(const AudioFrame &p_frame) const { return AudioFrame(l / p_frame.l, r / p_frame.r); }
|
|
|
|
_ALWAYS_INLINE_ AudioFrame operator+(float p_sample) const { return AudioFrame(l + p_sample, r + p_sample); }
|
|
_ALWAYS_INLINE_ AudioFrame operator-(float p_sample) const { return AudioFrame(l - p_sample, r - p_sample); }
|
|
_ALWAYS_INLINE_ AudioFrame operator*(float p_sample) const { return AudioFrame(l * p_sample, r * p_sample); }
|
|
_ALWAYS_INLINE_ AudioFrame operator/(float p_sample) const { return AudioFrame(l / p_sample, r / p_sample); }
|
|
|
|
_ALWAYS_INLINE_ void operator+=(const AudioFrame &p_frame) {
|
|
l += p_frame.l;
|
|
r += p_frame.r;
|
|
}
|
|
_ALWAYS_INLINE_ void operator-=(const AudioFrame &p_frame) {
|
|
l -= p_frame.l;
|
|
r -= p_frame.r;
|
|
}
|
|
_ALWAYS_INLINE_ void operator*=(const AudioFrame &p_frame) {
|
|
l *= p_frame.l;
|
|
r *= p_frame.r;
|
|
}
|
|
_ALWAYS_INLINE_ void operator/=(const AudioFrame &p_frame) {
|
|
l /= p_frame.l;
|
|
r /= p_frame.r;
|
|
}
|
|
|
|
_ALWAYS_INLINE_ void operator+=(float p_sample) {
|
|
l += p_sample;
|
|
r += p_sample;
|
|
}
|
|
_ALWAYS_INLINE_ void operator-=(float p_sample) {
|
|
l -= p_sample;
|
|
r -= p_sample;
|
|
}
|
|
_ALWAYS_INLINE_ void operator*=(float p_sample) {
|
|
l *= p_sample;
|
|
r *= p_sample;
|
|
}
|
|
_ALWAYS_INLINE_ void operator/=(float p_sample) {
|
|
l /= p_sample;
|
|
r /= p_sample;
|
|
}
|
|
|
|
_ALWAYS_INLINE_ void undenormalise() {
|
|
l = ::undenormalise(l);
|
|
r = ::undenormalise(r);
|
|
}
|
|
|
|
_FORCE_INLINE_ AudioFrame linear_interpolate(const AudioFrame &p_b, float p_t) const {
|
|
AudioFrame res = *this;
|
|
|
|
res.l += (p_t * (p_b.l - l));
|
|
res.r += (p_t * (p_b.r - r));
|
|
|
|
return res;
|
|
}
|
|
|
|
_ALWAYS_INLINE_ AudioFrame(float p_l, float p_r) {
|
|
l = p_l;
|
|
r = p_r;
|
|
}
|
|
_ALWAYS_INLINE_ AudioFrame(const AudioFrame &p_frame) {
|
|
l = p_frame.l;
|
|
r = p_frame.r;
|
|
}
|
|
|
|
_ALWAYS_INLINE_ AudioFrame operator=(const AudioFrame &p_frame) {
|
|
l = p_frame.l;
|
|
r = p_frame.r;
|
|
return *this;
|
|
}
|
|
|
|
_ALWAYS_INLINE_ operator Vector2() const {
|
|
return Vector2(l, r);
|
|
}
|
|
|
|
_ALWAYS_INLINE_ AudioFrame(const Vector2 &p_v2) {
|
|
l = p_v2.x;
|
|
r = p_v2.y;
|
|
}
|
|
_ALWAYS_INLINE_ AudioFrame() {}
|
|
};
|
|
|
|
#endif // AUDIO_FRAME_H
|