Merge branch 'v1.19' of git://repo.or.cz/openal-soft into v1.19v1.19

1 files changed, 64 insertions, 20 deletions

diff --git a/Alc/hrtf.h b/Alc/hrtf.h
index 6dcd6948..ab68929b 100644
--- a/Alc/hrtf.h
+++ b/Alc/hrtf.h
@@ -4,37 +4,81 @@
 #include "AL/al.h"
 #include "AL/alc.h"
 
+#include "alMain.h"
 #include "alstring.h"
+#include "atomic.h"
 
-enum DevFmtChannels;
 
-struct Hrtf;
-
-typedef struct HrtfEntry {
-    al_string name;
-    al_string filename;
-
-    const struct Hrtf *hrtf;
-} HrtfEntry;
-TYPEDEF_VECTOR(HrtfEntry, vector_HrtfEntry)
+#define HRTF_HISTORY_BITS   (6)
+#define HRTF_HISTORY_LENGTH (1<<HRTF_HISTORY_BITS)
+#define HRTF_HISTORY_MASK   (HRTF_HISTORY_LENGTH-1)
 
 #define HRIR_BITS        (7)
 #define HRIR_LENGTH      (1<<HRIR_BITS)
 #define HRIR_MASK        (HRIR_LENGTH-1)
-#define HRTFDELAY_BITS    (20)
-#define HRTFDELAY_FRACONE (1<<HRTFDELAY_BITS)
-#define HRTFDELAY_MASK    (HRTFDELAY_FRACONE-1)
+
+
+struct HrtfEntry;
+
+struct Hrtf {
+    RefCount ref;
+
+    ALuint sampleRate;
+    ALsizei irSize;
+
+    ALfloat distance;
+    ALubyte evCount;
+
+    const ALubyte *azCount;
+    const ALushort *evOffset;
+    const ALfloat (*coeffs)[2];
+    const ALubyte (*delays)[2];
+};
+
+
+typedef struct HrtfState {
+    alignas(16) ALfloat History[HRTF_HISTORY_LENGTH];
+    alignas(16) ALfloat Values[HRIR_LENGTH][2];
+} HrtfState;
+
+typedef struct HrtfParams {
+    alignas(16) ALfloat Coeffs[HRIR_LENGTH][2];
+    ALsizei Delay[2];
+    ALfloat Gain;
+} HrtfParams;
+
+typedef struct DirectHrtfState {
+    /* HRTF filter state for dry buffer content */
+    ALsizei Offset;
+    ALsizei IrSize;
+    struct {
+        alignas(16) ALfloat Values[HRIR_LENGTH][2];
+        alignas(16) ALfloat Coeffs[HRIR_LENGTH][2];
+    } Chan[];
+} DirectHrtfState;
+
+struct AngularPoint {
+    ALfloat Elev;
+    ALfloat Azim;
+};
+
 
 void FreeHrtfs(void);
 
-vector_HrtfEntry EnumerateHrtf(const_al_string devname);
-void FreeHrtfList(vector_HrtfEntry *list);
+vector_EnumeratedHrtf EnumerateHrtf(const_al_string devname);
+void FreeHrtfList(vector_EnumeratedHrtf *list);
+struct Hrtf *GetLoadedHrtf(struct HrtfEntry *entry);
+void Hrtf_IncRef(struct Hrtf *hrtf);
+void Hrtf_DecRef(struct Hrtf *hrtf);
 
-ALuint GetHrtfSampleRate(const struct Hrtf *Hrtf);
-ALuint GetHrtfIrSize(const struct Hrtf *Hrtf);
+void GetHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat spread, ALfloat (*coeffs)[2], ALsizei *delays);
 
-void GetLerpedHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat dirfact, ALfloat gain, ALfloat (*coeffs)[2], ALuint *delays);
-ALuint GetMovingHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat dirfact, ALfloat gain, ALfloat delta, ALint counter, ALfloat (*coeffs)[2], ALuint *delays, ALfloat (*coeffStep)[2], ALint *delayStep);
-void GetBFormatHrtfCoeffs(const struct Hrtf *Hrtf, const ALuint num_chans, ALfloat (**coeffs_list)[2], ALuint **delay_list);
+/**
+ * Produces HRTF filter coefficients for decoding B-Format, given a set of
+ * virtual speaker positions, a matching decoding matrix, and per-order high-
+ * frequency gains for the decoder. The calculated impulse responses are
+ * ordered and scaled according to the matrix input.
+ */
+void BuildBFormatHrtf(const struct Hrtf *Hrtf, DirectHrtfState *state, ALsizei NumChannels, const struct AngularPoint *AmbiPoints, const ALfloat (*restrict AmbiMatrix)[MAX_AMBI_COEFFS], ALsizei AmbiCount, const ALfloat *restrict AmbiOrderHFGain);
 
 #endif /* ALC_HRTF_H */