OpenAL32/Include/alSource.h

   1 #ifndef _AL_SOURCE_H_
   2 #define _AL_SOURCE_H_
   3
   4 #define MAX_SENDS                 4
   5
   6 #include "alMain.h"
   7 #include "alu.h"
   8 #include "hrtf.h"
   9
  10 #ifdef __cplusplus
  11 extern "C" {
  12 #endif
  13
  14 struct ALbuffer;
  15 struct ALsource;
  16
  17 extern enum Resampler DefaultResampler;
  18
  19 extern const ALsizei ResamplerPadding[ResamplerMax];
  20 extern const ALsizei ResamplerPrePadding[ResamplerMax];
  21
  22
  23 typedef struct ALbufferlistitem {
  24     struct ALbuffer *buffer;
  25     struct ALbufferlistitem *volatile next;
  26     struct ALbufferlistitem *volatile prev;
  27 } ALbufferlistitem;
  28
  29
  30 typedef struct ALvoice {
  31     struct ALsource *volatile Source;
  32
  33     /** Method to update mixing parameters. */
  34     ALvoid (*Update)(struct ALvoice *self, const struct ALsource *source, const ALCcontext *context);
  35
  36     /** Current target parameters used for mixing. */
  37     ALint Step;
  38
  39     ALboolean IsHrtf;
  40
  41     ALuint Offset; /* Number of output samples mixed since starting. */
  42
  43     DirectParams Direct;
  44     SendParams Send[MAX_SENDS];
  45 } ALvoice;
  46
  47
  48 typedef struct ALsource {
  49     /** Source properties. */
  50     volatile ALfloat   Pitch;
  51     volatile ALfloat   Gain;
  52     volatile ALfloat   OuterGain;
  53     volatile ALfloat   MinGain;
  54     volatile ALfloat   MaxGain;
  55     volatile ALfloat   InnerAngle;
  56     volatile ALfloat   OuterAngle;
  57     volatile ALfloat   RefDistance;
  58     volatile ALfloat   MaxDistance;
  59     volatile ALfloat   RollOffFactor;
  60     volatile ALfloat   Position[3];
  61     volatile ALfloat   Velocity[3];
  62     volatile ALfloat   Orientation[3];
  63     volatile ALboolean HeadRelative;
  64     volatile ALboolean Looping;
  65     volatile enum DistanceModel DistanceModel;
  66     volatile ALboolean DirectChannels;
  67
  68     volatile ALboolean DryGainHFAuto;
  69     volatile ALboolean WetGainAuto;
  70     volatile ALboolean WetGainHFAuto;
  71     volatile ALfloat   OuterGainHF;
  72
  73     volatile ALfloat AirAbsorptionFactor;
  74     volatile ALfloat RoomRolloffFactor;
  75     volatile ALfloat DopplerFactor;
  76
  77     volatile ALfloat Radius;
  78
  79     enum Resampler Resampler;
  80
  81     /**
  82      * Last user-specified offset, and the offset type (bytes, samples, or
  83      * seconds).
  84      */
  85     ALdouble Offset;
  86     ALenum   OffsetType;
  87
  88     /** Source type (static, streaming, or undetermined) */
  89     volatile ALint SourceType;
  90
  91     /** Source state (initial, playing, paused, or stopped) */
  92     volatile ALenum state;
  93     ALenum new_state;
  94
  95     /**
  96      * Source offset in samples, relative to the currently playing buffer, NOT
  97      * the whole queue, and the fractional (fixed-point) offset to the next
  98      * sample.
  99      */
 100     ALuint position;
 101     ALuint position_fraction;
 102
 103     /** Source Buffer Queue info. */
 104     ATOMIC(ALbufferlistitem*) queue;
 105     ATOMIC(ALbufferlistitem*) current_buffer;
 106     RWLock queue_lock;
 107
 108     /** Current buffer sample info. */
 109     ALuint NumChannels;
 110     ALuint SampleSize;
 111
 112     /** Direct filter and auxiliary send info. */
 113     struct {
 114         ALfloat Gain;
 115         ALfloat GainHF;
 116         ALfloat HFReference;
 117         ALfloat GainLF;
 118         ALfloat LFReference;
 119     } Direct;
 120     struct {
 121         struct ALeffectslot *Slot;
 122         ALfloat Gain;
 123         ALfloat GainHF;
 124         ALfloat HFReference;
 125         ALfloat GainLF;
 126         ALfloat LFReference;
 127     } Send[MAX_SENDS];
 128
 129     /** Source needs to update its mixing parameters. */
 130     ATOMIC(ALenum) NeedsUpdate;
 131
 132     /** Self ID */
 133     ALuint id;
 134 } ALsource;
 135
 136 inline struct ALsource *LookupSource(ALCcontext *context, ALuint id)
 137 { return (struct ALsource*)LookupUIntMapKey(&context->SourceMap, id); }
 138 inline struct ALsource *RemoveSource(ALCcontext *context, ALuint id)
 139 { return (struct ALsource*)RemoveUIntMapKey(&context->SourceMap, id); }
 140
 141 ALvoid SetSourceState(ALsource *Source, ALCcontext *Context, ALenum state);
 142 ALboolean ApplyOffset(ALsource *Source);
 143
 144 ALvoid ReleaseALSources(ALCcontext *Context);
 145
 146 #ifdef __cplusplus
 147 }
 148 #endif
 149
 150 #endif