re-applied the SDL_NewAudioStream deconstification, including to its definition

we should keep this to SDL3 only.

include/SDL3/SDL_audio.h

@@ -1008,12 +1008,12 @@ typedef struct _SDL_AudioStream SDL_AudioStream;
  * \sa SDL_AudioStreamClear
  * \sa SDL_FreeAudioStream
  */
-extern DECLSPEC SDL_AudioStream * SDLCALL SDL_NewAudioStream(const SDL_AudioFormat src_format,
-                                           const Uint8 src_channels,
-                                           const int src_rate,
-                                           const SDL_AudioFormat dst_format,
-                                           const Uint8 dst_channels,
-                                           const int dst_rate);
+extern DECLSPEC SDL_AudioStream *SDLCALL SDL_NewAudioStream(SDL_AudioFormat src_format,
+                                                            Uint8 src_channels,
+                                                            int src_rate,
+                                                            SDL_AudioFormat dst_format,
+                                                            Uint8 dst_channels,
+                                                            int dst_rate);
 
 /**
  * Add data to be converted/resampled to the stream.

src/audio/SDL_audiocvt.c

@@ -997,12 +997,12 @@ static void SDL_CleanupAudioStreamResampler(SDL_AudioStream *stream)
 }
 
 SDL_AudioStream *
-SDL_NewAudioStream(const SDL_AudioFormat src_format,
-                   const Uint8 src_channels,
-                   const int src_rate,
-                   const SDL_AudioFormat dst_format,
-                   const Uint8 dst_channels,
-                   const int dst_rate)
+SDL_NewAudioStream(SDL_AudioFormat src_format,
+                   Uint8 src_channels,
+                   int src_rate,
+                   SDL_AudioFormat dst_format,
+                   Uint8 dst_channels,
+                   int dst_rate)
 {
     int packetlen = 4096; /* !!! FIXME: good enough for now. */
     Uint8 pre_resample_channels;

src/dynapi/SDL_dynapi_procs.h

@@ -660,7 +660,7 @@ SDL_DYNAPI_PROC(void,SDL_UnlockJoysticks,(void),(),)
 SDL_DYNAPI_PROC(void,SDL_GetMemoryFunctions,(SDL_malloc_func *a, SDL_calloc_func *b, SDL_realloc_func *c, SDL_free_func *d),(a,b,c,d),)
 SDL_DYNAPI_PROC(int,SDL_SetMemoryFunctions,(SDL_malloc_func a, SDL_calloc_func b, SDL_realloc_func c, SDL_free_func d),(a,b,c,d),return)
 SDL_DYNAPI_PROC(int,SDL_GetNumAllocations,(void),(),return)
-SDL_DYNAPI_PROC(SDL_AudioStream*,SDL_NewAudioStream,(const SDL_AudioFormat a, const Uint8 b, const int c, const SDL_AudioFormat d, const Uint8 e, const int f),(a,b,c,d,e,f),return)
+SDL_DYNAPI_PROC(SDL_AudioStream*,SDL_NewAudioStream,(SDL_AudioFormat a, Uint8 b, int c, SDL_AudioFormat d, Uint8 e, int f),(a,b,c,d,e,f),return)
 SDL_DYNAPI_PROC(int,SDL_AudioStreamPut,(SDL_AudioStream *a, const void *b, int c),(a,b,c),return)
 SDL_DYNAPI_PROC(int,SDL_AudioStreamGet,(SDL_AudioStream *a, void *b, int c),(a,b,c),return)
 SDL_DYNAPI_PROC(void,SDL_AudioStreamClear,(SDL_AudioStream *a),(a),)