ADDED: Audio stream input callback #2212 -WIP-

WARNING: This addition is based on a PR and it's still under review, not sure if it will be maintained in the future. In general, raylib tries to avoid callbacks usage mechanisms.

src/raylib.h

@@ -425,6 +425,8 @@ typedef struct Wave {
     void *data;                 // Buffer data pointer
 } Wave;
 
+// Opaque structs declaration
+// NOTE: Actual structs are defined internally in raudio module
 typedef struct rAudioBuffer rAudioBuffer;
 
 // AudioStream, custom audio stream
@@ -1472,6 +1474,7 @@ RLAPI RayCollision GetRayCollisionQuad(Ray ray, Vector3 p1, Vector3 p2, Vector3
 //------------------------------------------------------------------------------------
 // Audio Loading and Playing Functions (Module: audio)
 //------------------------------------------------------------------------------------
+typedef void (*AudioStreamCallback)(void *bufferData, unsigned int frames);
 
 // Audio device management functions
 RLAPI void InitAudioDevice(void);                                     // Initialize audio device and context
@@ -1539,6 +1542,7 @@ RLAPI void SetAudioStreamVolume(AudioStream stream, float volume);    // Set vol
 RLAPI void SetAudioStreamPitch(AudioStream stream, float pitch);      // Set pitch for audio stream (1.0 is base level)
 RLAPI void SetAudioStreamPan(AudioStream stream, float pan);          // Set pan for audio stream (0.5 is centered)
 RLAPI void SetAudioStreamBufferSizeDefault(int size);                 // Default size for new audio streams
+RLAPI void SetAudioStreamCallback(AudioStream stream, AudioStreamCallback callback);  // Audio thread callback to request new data
 
 #if defined(__cplusplus)
 }