From 0fe38c053d8dd827e774fbe0aef121e7aa0a0f28 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Sun, 25 Apr 2021 11:36:37 -0700
Subject: Move some functions to core

And clean up more includes
---
 alc/alu.h | 85 ---------------------------------------------------------------
 1 file changed, 85 deletions(-)

(limited to 'alc/alu.h')

diff --git a/alc/alu.h b/alc/alu.h
index b75c040e..ac33de27 100644
--- a/alc/alu.h
+++ b/alc/alu.h
@@ -22,13 +22,6 @@ struct MixParams;
 #define MAX_SENDS  6
 
 
-using MixerFunc = void(*)(const al::span<const float> InSamples,
-    const al::span<FloatBufferLine> OutBuffer, float *CurrentGains, const float *TargetGains,
-    const size_t Counter, const size_t OutPos);
-
-extern MixerFunc MixSamples;
-
-
 constexpr float GainMixMax{1000.0f}; /* +60dB */
 
 constexpr float SpeedOfSoundMetersPerSec{343.3f};
@@ -55,84 +48,6 @@ void aluInitRenderer(ALCdevice *device, int hrtf_id, HrtfRequestMode hrtf_appreq
 
 void aluInitEffectPanning(EffectSlot *slot, ALCcontext *context);
 
-/**
- * Calculates ambisonic encoder coefficients using the X, Y, and Z direction
- * components, which must represent a normalized (unit length) vector, and the
- * spread is the angular width of the sound (0...tau).
- *
- * NOTE: The components use ambisonic coordinates. As a result:
- *
- * Ambisonic Y = OpenAL -X
- * Ambisonic Z = OpenAL Y
- * Ambisonic X = OpenAL -Z
- *
- * The components are ordered such that OpenAL's X, Y, and Z are the first,
- * second, and third parameters respectively -- simply negate X and Z.
- */
-std::array<float,MaxAmbiChannels> CalcAmbiCoeffs(const float y, const float z, const float x,
-    const float spread);
-
-/**
- * CalcDirectionCoeffs
- *
- * Calculates ambisonic coefficients based on an OpenAL direction vector. The
- * vector must be normalized (unit length), and the spread is the angular width
- * of the sound (0...tau).
- */
-inline std::array<float,MaxAmbiChannels> CalcDirectionCoeffs(const float (&dir)[3],
-    const float spread)
-{
-    /* Convert from OpenAL coords to Ambisonics. */
-    return CalcAmbiCoeffs(-dir[0], dir[1], -dir[2], spread);
-}
-
-/**
- * CalcAngleCoeffs
- *
- * Calculates ambisonic coefficients based on azimuth and elevation. The
- * azimuth and elevation parameters are in radians, going right and up
- * respectively.
- */
-inline std::array<float,MaxAmbiChannels> CalcAngleCoeffs(const float azimuth,
-    const float elevation, const float spread)
-{
-    const float x{-std::sin(azimuth) * std::cos(elevation)};
-    const float y{ std::sin(elevation)};
-    const float z{ std::cos(azimuth) * std::cos(elevation)};
-
-    return CalcAmbiCoeffs(x, y, z, spread);
-}
-
-
-/**
- * ComputePanGains
- *
- * Computes panning gains using the given channel decoder coefficients and the
- * pre-calculated direction or angle coefficients. For B-Format sources, the
- * coeffs are a 'slice' of a transform matrix for the input channel, used to
- * scale and orient the sound samples.
- */
-void ComputePanGains(const MixParams *mix, const float*RESTRICT coeffs, const float ingain,
-    const al::span<float,MAX_OUTPUT_CHANNELS> gains);
-
-
-/** Helper to set an identity/pass-through panning for ambisonic mixing (3D input). */
-template<typename T, typename I, typename F>
-auto SetAmbiPanIdentity(T iter, I count, F func) -> std::enable_if_t<std::is_integral<I>::value>
-{
-    if(count < 1) return;
-
-    std::array<float,MaxAmbiChannels> coeffs{{1.0f}};
-    func(*iter, coeffs);
-    ++iter;
-    for(I i{1};i < count;++i,++iter)
-    {
-        coeffs[i-1] = 0.0f;
-        coeffs[i  ] = 1.0f;
-        func(*iter, coeffs);
-    }
-}
-
 
 extern const float ConeScale;
 extern const float ZScale;
-- 
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