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-rw-r--r--Alc/effects/reverb.c171
1 files changed, 50 insertions, 121 deletions
diff --git a/Alc/effects/reverb.c b/Alc/effects/reverb.c
index 000ba59a..60ff79b2 100644
--- a/Alc/effects/reverb.c
+++ b/Alc/effects/reverb.c
@@ -303,6 +303,30 @@ static ALvoid ALreverbState_Destruct(ALreverbState *State)
ALeffectState_Destruct(STATIC_CAST(ALeffectState,State));
}
+/* The B-Format to A-Format conversion matrix. The arrangement of rows is
+ * deliberately chosen to align the resulting lines to their spatial opposites
+ * (0:above front left <-> 3:above back right, 1:below front right <-> 2:below
+ * back left). It's not quite opposite, since the A-Format results in a
+ * tetrahedron, but it's close enough. Should the model be extended to 8-lines
+ * in the future, true opposites can be used.
+ */
+static const aluMatrixf B2A = {{
+ { 0.288675134595f, 0.288675134595f, 0.288675134595f, 0.288675134595f },
+ { 0.288675134595f, -0.288675134595f, -0.288675134595f, 0.288675134595f },
+ { 0.288675134595f, 0.288675134595f, -0.288675134595f, -0.288675134595f },
+ { 0.288675134595f, -0.288675134595f, 0.288675134595f, -0.288675134595f }
+}};
+
+/* Converts A-Format to B-Format (transposed). */
+static const aluMatrixf A2B = {{
+ { 0.8660254038f, 0.8660254038f, 0.8660254038f, 0.8660254038f },
+ { 0.8660254038f, -0.8660254038f, -0.8660254038f, 0.8660254038f },
+ { 0.8660254038f, 0.8660254038f, -0.8660254038f, -0.8660254038f },
+ { 0.8660254038f, -0.8660254038f, 0.8660254038f, -0.8660254038f }
+}};
+
+static const ALfloat FadeStep = 1.0f / FADE_SAMPLES;
+
/* This is a user config option for modifying the overall output of the reverb
* effect.
*/
@@ -1275,14 +1299,6 @@ static aluMatrixf GetTransformFromVector(const ALfloat *vec)
/* Update the early and late 3D panning gains. */
static ALvoid Update3DPanning(const ALCdevice *Device, const ALfloat *ReflectionsPan, const ALfloat *LateReverbPan, const ALfloat gain, const ALfloat earlyGain, const ALfloat lateGain, ALreverbState *State)
{
- /* Converts A-Format to B-Format (transposed). */
- static const aluMatrixf A2B = {{
- { 0.8660254038f, 0.8660254038f, 0.8660254038f, 0.8660254038f },
- { 0.8660254038f, -0.8660254038f, -0.8660254038f, 0.8660254038f },
- { 0.8660254038f, 0.8660254038f, -0.8660254038f, -0.8660254038f },
- { 0.8660254038f, -0.8660254038f, 0.8660254038f, -0.8660254038f }
- }};
-
aluMatrixf transform, rot;
ALsizei i;
@@ -1633,7 +1649,7 @@ static inline void VectorReverse(ALfloat vec[4])
*/
#define DECL_TEMPLATE(T) \
static ALvoid EarlyReflection_##T(ALreverbState *State, const ALsizei todo, \
- ALfloat fade, const ALfloat step, \
+ ALfloat fade, \
ALfloat (*restrict out)[MAX_UPDATE_SAMPLES])\
{ \
ALsizei offset = State->Offset; \
@@ -1675,7 +1691,7 @@ static ALvoid EarlyReflection_##T(ALreverbState *State, const ALsizei todo, \
f[j]); \
\
offset++; \
- fade = minf(1.0f, fade + step);/*fade += step;*/ \
+ fade = minf(1.0f, fade + FadeStep); \
} \
}
DECL_TEMPLATE(Unfaded)
@@ -1720,7 +1736,7 @@ static inline ALfloat LateT60Filter(const ALsizei index, const ALfloat in, ALrev
*/
#define DECL_TEMPLATE(T) \
static ALvoid LateReverb_##T(ALreverbState *State, const ALsizei todo, \
- ALfloat fade, const ALfloat step, \
+ ALfloat fade, \
ALfloat (*restrict out)[MAX_UPDATE_SAMPLES]) \
{ \
const ALfloat apFeedCoeff = State->ApFeedCoeff; \
@@ -1761,18 +1777,22 @@ static ALvoid LateReverb_##T(ALreverbState *State, const ALsizei todo, \
DelayLineIn(&State->Late.Delay[j], offset, f[j]); \
\
offset++; \
- fade = minf(1.0f, fade + step);/*fade += step;*/ \
+ fade = minf(1.0f, fade + FadeStep); \
} \
}
DECL_TEMPLATE(Unfaded)
DECL_TEMPLATE(Faded)
#undef DECL_TEMPLATE
+typedef ALfloat (*ProcMethodType)(ALreverbState *State, const ALsizei todo, ALfloat fade,
+ const ALfloat (*restrict input)[MAX_UPDATE_SAMPLES],
+ ALfloat (*restrict early)[MAX_UPDATE_SAMPLES], ALfloat (*restrict late)[MAX_UPDATE_SAMPLES]);
+
/* Perform the non-EAX reverb pass on a given input sample, resulting in
* four-channel output.
*/
static ALfloat VerbPass(ALreverbState *State, const ALsizei todo, ALfloat fade,
- const ALfloat step, ALfloat (*restrict input)[MAX_UPDATE_SAMPLES],
+ const ALfloat (*restrict input)[MAX_UPDATE_SAMPLES],
ALfloat (*restrict early)[MAX_UPDATE_SAMPLES],
ALfloat (*restrict late)[MAX_UPDATE_SAMPLES])
{
@@ -1793,19 +1813,19 @@ static ALfloat VerbPass(ALreverbState *State, const ALsizei todo, ALfloat fade,
if(fade < 1.0f)
{
/* Generate early reflections. */
- EarlyReflection_Faded(State, todo, fade, step, early);
+ EarlyReflection_Faded(State, todo, fade, early);
/* Generate late reverb. */
- LateReverb_Faded(State, todo, fade, step, late);
- fade = minf(1.0f, fade + todo*step);
+ LateReverb_Faded(State, todo, fade, late);
+ fade = minf(1.0f, fade + todo*FadeStep);
}
else
{
/* Generate early reflections. */
- EarlyReflection_Unfaded(State, todo, fade, step, early);
+ EarlyReflection_Unfaded(State, todo, fade, early);
/* Generate late reverb. */
- LateReverb_Unfaded(State, todo, fade, step, late);
+ LateReverb_Unfaded(State, todo, fade, late);
}
/* Step all delays forward one sample. */
@@ -1817,7 +1837,10 @@ static ALfloat VerbPass(ALreverbState *State, const ALsizei todo, ALfloat fade,
/* Perform the EAX reverb pass on a given input sample, resulting in four-
* channel output.
*/
-static ALfloat EAXVerbPass(ALreverbState *State, const ALsizei todo, ALfloat fade, const ALfloat step, ALfloat (*restrict input)[MAX_UPDATE_SAMPLES], ALfloat (*restrict early)[MAX_UPDATE_SAMPLES], ALfloat (*restrict late)[MAX_UPDATE_SAMPLES])
+static ALfloat EAXVerbPass(ALreverbState *State, const ALsizei todo, ALfloat fade,
+ const ALfloat (*restrict input)[MAX_UPDATE_SAMPLES],
+ ALfloat (*restrict early)[MAX_UPDATE_SAMPLES],
+ ALfloat (*restrict late)[MAX_UPDATE_SAMPLES])
{
ALsizei i, c;
@@ -1843,19 +1866,19 @@ static ALfloat EAXVerbPass(ALreverbState *State, const ALsizei todo, ALfloat fad
if(fade < 1.0f)
{
/* Generate early reflections. */
- EarlyReflection_Faded(State, todo, fade, step, early);
+ EarlyReflection_Faded(State, todo, fade, early);
/* Generate late reverb. */
- LateReverb_Faded(State, todo, fade, step, late);
- fade = minf(1.0f, fade + todo*step);
+ LateReverb_Faded(State, todo, fade, late);
+ fade = minf(1.0f, fade + todo*FadeStep);
}
else
{
/* Generate early reflections. */
- EarlyReflection_Unfaded(State, todo, fade, step, early);
+ EarlyReflection_Unfaded(State, todo, fade, early);
/* Generate late reverb. */
- LateReverb_Unfaded(State, todo, fade, step, late);
+ LateReverb_Unfaded(State, todo, fade, late);
}
/* Step all delays forward. */
@@ -1864,23 +1887,9 @@ static ALfloat EAXVerbPass(ALreverbState *State, const ALsizei todo, ALfloat fad
return fade;
}
-static ALvoid ALreverbState_processStandard(ALreverbState *State, const ALuint SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], const ALuint NumChannels)
+static ALvoid ALreverbState_process(ALreverbState *State, ALuint SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALuint NumChannels)
{
- /* The B-Format to A-Format conversion matrix. The arragement of rows
- * is deliberately chosen to align the resulting lines to their spatial
- * opposites (0:above front left <-> 3:above back right, 1:below front
- * right <-> 2:below back left). It's not quite opposite, since the
- * A-Format results in a tetrahedron, but it's close enough. Should the
- * model be extended to 8-lines in the future, true opposites can be
- * used.
- */
- static const aluMatrixf B2A = {{
- { 0.288675134595f, 0.288675134595f, 0.288675134595f, 0.288675134595f },
- { 0.288675134595f, -0.288675134595f, -0.288675134595f, 0.288675134595f },
- { 0.288675134595f, 0.288675134595f, -0.288675134595f, -0.288675134595f },
- { 0.288675134595f, -0.288675134595f, 0.288675134595f, -0.288675134595f }
- }};
- static const ALfloat FadeStep = 1.0f / FADE_SAMPLES;
+ ProcMethodType ReverbProc = State->IsEax ? EAXVerbPass : VerbPass;
ALfloat (*restrict afmt)[MAX_UPDATE_SAMPLES] = State->AFormatSamples;
ALfloat (*restrict early)[MAX_UPDATE_SAMPLES] = State->EarlySamples;
ALfloat (*restrict late)[MAX_UPDATE_SAMPLES] = State->ReverbSamples;
@@ -1901,78 +1910,7 @@ static ALvoid ALreverbState_processStandard(ALreverbState *State, const ALuint S
);
/* Process the samples for reverb. */
- fade = VerbPass(State, todo, fade, FadeStep, afmt, early, late);
- if(UNEXPECTED(fadeCount < FADE_SAMPLES) && (fadeCount += todo) >= FADE_SAMPLES)
- {
- /* Update the cross-fading delay line taps. */
- fadeCount = FADE_SAMPLES;
- for(c = 0;c < 4;c++)
- {
- State->EarlyDelayTap[c][0] = State->EarlyDelayTap[c][1];
- State->Early.Ap[c].Offset[0] = State->Early.Ap[c].Offset[1];
- State->Early.Offset[c][0] = State->Early.Offset[c][1];
- State->LateDelayTap[c][0] = State->LateDelayTap[c][1];
- State->Late.Ap[c].Offset[0] = State->Late.Ap[c].Offset[1];
- State->Late.Offset[c][0] = State->Late.Offset[c][1];
- }
- }
-
- /* Mix the A-Format results to output, implicitly converting back to
- * B-Format.
- */
- for(c = 0;c < 4;c++)
- MixSamples(early[c], NumChannels, SamplesOut,
- State->Early.CurrentGain[c], State->Early.PanGain[c],
- SamplesToDo-base, base, todo
- );
- for(c = 0;c < 4;c++)
- MixSamples(late[c], NumChannels, SamplesOut,
- State->Late.CurrentGain[c], State->Late.PanGain[c],
- SamplesToDo-base, base, todo
- );
-
- base += todo;
- }
- State->FadeCount = fadeCount;
-}
-
-static ALvoid ALreverbState_processEax(ALreverbState *State, const ALuint SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], const ALuint NumChannels)
-{
- /* The B-Format to A-Format conversion matrix. The arragement of rows
- * is deliberately chosen to align the resulting lines to their spatial
- * opposites (0:above front left <-> 3:above back right, 1:below front
- * right <-> 2:below back left). It's not quite opposite, since the
- * A-Format results in a tetrahedron, but it's close enough. Should the
- * model be extended to 8-lines in the future, true opposites can be
- * used.
- */
- static const aluMatrixf B2A = {{
- { 0.288675134595f, 0.288675134595f, 0.288675134595f, 0.288675134595f },
- { 0.288675134595f, -0.288675134595f, -0.288675134595f, 0.288675134595f },
- { 0.288675134595f, 0.288675134595f, -0.288675134595f, -0.288675134595f },
- { 0.288675134595f, -0.288675134595f, 0.288675134595f, -0.288675134595f }
- }};
- static const ALfloat FadeStep = 1.0f / FADE_SAMPLES;
- ALfloat (*restrict afmt)[MAX_UPDATE_SAMPLES] = State->AFormatSamples;
- ALfloat (*restrict early)[MAX_UPDATE_SAMPLES] = State->EarlySamples;
- ALfloat (*restrict late)[MAX_UPDATE_SAMPLES] = State->ReverbSamples;
- ALsizei fadeCount = State->FadeCount;
- ALfloat fade = (ALfloat)fadeCount / FADE_SAMPLES;
- ALuint base, c;
-
- /* Process reverb for these samples. */
- for(base = 0;base < SamplesToDo;)
- {
- ALsizei todo = minu(SamplesToDo-base, MAX_UPDATE_SAMPLES);
-
- memset(afmt, 0, 4*MAX_UPDATE_SAMPLES*sizeof(float));
- for(c = 0;c < 4;c++)
- MixRowSamples(afmt[c], B2A.m[c],
- SamplesIn, MAX_EFFECT_CHANNELS, base, todo
- );
-
- /* Process the samples for EAX reverb. */
- fade = EAXVerbPass(State, todo, fade, FadeStep, afmt, early, late);
+ fade = ReverbProc(State, todo, fade, afmt, early, late);
if(UNEXPECTED(fadeCount < FADE_SAMPLES) && (fadeCount += todo) >= FADE_SAMPLES)
{
/* Update the cross-fading delay line taps. */
@@ -2007,15 +1945,6 @@ static ALvoid ALreverbState_processEax(ALreverbState *State, const ALuint Sample
State->FadeCount = fadeCount;
}
-static ALvoid ALreverbState_process(ALreverbState *State, ALuint SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALuint NumChannels)
-{
- /* Process the EAX or non-EAX reverb effect. */
- if(State->IsEax)
- ALreverbState_processEax(State, SamplesToDo, SamplesIn, SamplesOut, NumChannels);
- else
- ALreverbState_processStandard(State, SamplesToDo, SamplesIn, SamplesOut, NumChannels);
-}
-
typedef struct ALreverbStateFactory {
DERIVE_FROM_TYPE(ALeffectStateFactory);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 13:11:00 +0000