kit_sdl2_kmixerAsync.c as of 2023-10-12

#include "../include/kit_sdl2/kit_kmixer.h"
#include "../_private/include/_kit_privmacro.h"
#include "../_private/include/_kit_kmixerAllPrivate.h"
//todo: include mutexes where they should be



typedef struct _kit_kmixerAsyncTrack {
  kit_acodecPCM* pcm;
  //double
  Uint64     position;
  Uint32        index;
  Uint32    timeStamp;
  SDL_bool stopOnMute;
  Uint32     _padding;
} _kit_kmixerAsyncTrack;



//this should be contiguous with the AsyncTrack(s)
typedef struct _kit_kmixerAsyncUserdata {
  kit_kmixerVoiceSpec vspec;
  Uint32 numTracks;
  Uint32 padding;

  _kit_kmixerAsyncTrack* tracks;
} _kit_kmixerAsyncUserdata;



void _kit_kmixerAsyncRemoveCallback(void* userdata){  if(userdata != NULL) SDL_free(userdata);  }



void _kit_kmixerAsyncTrackCallback(void* userdata, void* _stream, int size, SDL_bool hasInput){
}



void _kit_kmixerAsyncVoiceCallback(void* userdata, void* _stream, int size, SDL_bool hasInput){
}




Uint32 kit_kmixerAsyncAdd(kit_kmixerDevice* device, kit_kmixerVoiceSpec* vspec,
                          Uint32 outputVoiceID, Uint32 numTracks)
{
  Uint32 newIndex = 0; //0 for error by default
  _DEVICE_VALIDITY_CHECK(0)
  _IF_SDLERR(outputVoiceID>=device->_raw->x,;,"outputVoiceID out of bounds")
  _IF_SDLERR(numTracks==0,;,"!numTracks")

  _IF_SDLERR(vspec==NULL,;,"!vspec")
  vspec->remove   = _kit_kmixerAsyncRemoveCallback;
  vspec->callback = _kit_kmixerAsyncVoiceCallback;

  //(then do userdata stuff here)

  newIndex = kit_kmixerVoiceAdd(device,vspec,outputVoiceID);

  _noerr_:
  _error_:
  return newIndex;
}