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