open source

2020-11-11 16:17:13 +08:00
parent 4d989f3ecb
commit bc4ca748de
2441 changed files with 623057 additions and 2 deletions
@@ -0,0 +1,115 @@
+#ifndef _AL_SOURCE_H_
+#define _AL_SOURCE_H_
+
+#define MAX_SENDS                 2
+
+#include "alFilter.h"
+#include "alu.h"
+#include "AL/al.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    POINT_RESAMPLER = 0,
+    LINEAR_RESAMPLER,
+    COSINE_RESAMPLER,
+
+    RESAMPLER_MAX,
+    RESAMPLER_MIN = -1,
+    RESAMPLER_DEFAULT = LINEAR_RESAMPLER
+} resampler_t;
+extern resampler_t DefaultResampler;
+
+typedef struct ALbufferlistitem
+{
+    struct ALbuffer         *buffer;
+    struct ALbufferlistitem *next;
+} ALbufferlistitem;
+
+typedef struct ALsource
+{
+    ALfloat      flPitch;
+    ALfloat      flGain;
+    ALfloat      flOuterGain;
+    ALfloat      flMinGain;
+    ALfloat      flMaxGain;
+    ALfloat      flInnerAngle;
+    ALfloat      flOuterAngle;
+    ALfloat      flRefDistance;
+    ALfloat      flMaxDistance;
+    ALfloat      flRollOffFactor;
+    ALfloat      vPosition[3];
+    ALfloat      vVelocity[3];
+    ALfloat      vOrientation[3];
+    ALboolean    bHeadRelative;
+    ALboolean    bLooping;
+    ALenum       DistanceModel;
+
+    resampler_t  Resampler;
+
+    ALenum       state;
+    ALuint       position;
+    ALuint       position_fraction;
+
+    struct ALbuffer *Buffer;
+
+    struct ALbufferlistitem *queue; // Linked list of buffers in queue
+    ALuint       BuffersInQueue;    // Number of buffers in queue
+    ALuint       BuffersPlayed;     // Number of buffers played on this loop
+
+    ALfilter DirectFilter;
+
+    struct {
+        struct ALeffectslot *Slot;
+        ALfilter WetFilter;
+    } Send[MAX_SENDS];
+
+    ALboolean DryGainHFAuto;
+    ALboolean WetGainAuto;
+    ALboolean WetGainHFAuto;
+    ALfloat   OuterGainHF;
+
+    ALfloat AirAbsorptionFactor;
+    ALfloat RoomRolloffFactor;
+    ALfloat DopplerFactor;
+
+    ALint  lOffset;
+    ALint  lOffsetType;
+
+    // Source Type (Static, Streaming, or Undetermined)
+    ALint  lSourceType;
+
+    // Current gains, which are ramped while mixed
+    ALfloat DryGains[OUTPUTCHANNELS];
+    ALfloat WetGains[MAX_SENDS];
+    ALboolean FirstStart;
+
+    // Current target parameters used for mixing
+    ALboolean NeedsUpdate;
+    struct {
+        ALfloat DryGains[OUTPUTCHANNELS];
+        ALfloat WetGains[MAX_SENDS];
+        ALfloat Pitch;
+
+        struct {
+            FILTER iirFilter;
+            ALfloat history[OUTPUTCHANNELS];
+        } Send[MAX_SENDS];
+
+        FILTER iirFilter;
+        ALfloat history[OUTPUTCHANNELS*2];
+    } Params;
+
+    // Index to itself
+    ALuint source;
+} ALsource;
+
+ALvoid ReleaseALSources(ALCcontext *Context);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif