kmixerAsync Demo

#define SDL_MAIN_HANDLED
#include <kit_sdl2/kit_all.h>


int main(int argc, char** argv){
  //initialize kmixer and core, which kmixer relies on
  if(kit_coreInit(0)<0) return 1;
  if(kit_kmixerInit(-0.5f)<0) return 2; //use only half the cpu cores present

  //set up device specification, which optionally doubles as voice 1's spec
  kit_kmixerVoiceSpec specO,spec={0};
  spec.callback = NULL;
  spec.freq     = 44100;
  spec.samples  = 4096;
  spec.stereo   = SDL_TRUE;
  spec.format   = 0; //AUDIO_F32;
  kit_kmixerDevice* device = kit_kmixerDeviceOpen(NULL,0,&spec,&specO);
  if(device==NULL) return 3;

  //todo: SOLVE THE PROBLEM WITH ADDING TRACKS
  Uint32 asyncID = kit_kmixerAsyncAdd(device, SDL_TRUE, SDL_TRUE, 0, 3);
  if(!asyncID){ SDL_Log("error=\"%s\"",SDL_GetError()); return 5; }


  kit_acodecPCM* bgm = kit_acodecWAVRead("dat/44100_f32_stereo_lotus.wav");
  if(!bgm){ SDL_Log("bgm error=\"%s\"",SDL_GetError()); return 4; }
  bgm->loopCount = 1;

  kit_acodecPCM* choir = kit_acodecWAVRead("dat/44100_f32_stereo_choir.wav");
  if(!choir){ SDL_Log("choir error=\"%s\"",SDL_GetError()); return 4; }

  kit_acodecPCM* jingle = kit_acodecWAVRead("dat/44100_f32_stereo_jingle.wav");
  if(!jingle){ SDL_Log("jingle error=\"%s\"",SDL_GetError()); return 4; }

  kit_acodecPCM* mboxA3 = kit_acodecWAVRead("dat/44100_f32_stereo_mboxA3.wav");
  if(!mboxA3){ SDL_Log("mboxA3 error=\"%s\"",SDL_GetError()); return 4; }



  kit_kmixerDeviceUnpauseAndWait(device);
  Uint32 trackNum;


  SDL_Log("play bgm (with 1 loop)");
  Uint32 bgmTrack = kit_kmixerAsyncPlayPVS(device, asyncID,  bgm,
                                           0.0f, 0.33f,0.33f, 0.8);
  SDL_Delay(2000);

  SDL_Log("pan left");
  kit_kmixerAsyncPlayP(device, asyncID, choir, -0.5f);
  SDL_Delay(2000);

  SDL_Log("pan right");
  kit_kmixerAsyncPlayP(device, asyncID, choir, 0.5f);
  SDL_Delay(2500);

  SDL_Log("speed up");
  trackNum = kit_kmixerAsyncPlayV(device, asyncID,  jingle, 0.6f,0.6f);
  kit_kmixerAsyncSetTrackDeltaS2(device, asyncID, trackNum, 1);
  while(kit_kmixerAsyncGetTrackPlayState(device,asyncID,trackNum)) SDL_Delay(100);

  SDL_Log("slow down");
  trackNum = kit_kmixerAsyncPlayV(device, asyncID,  jingle,  0.6f,0.6f);
  kit_kmixerAsyncSetTrackDeltaS2(device, asyncID, trackNum, -1);
  while(kit_kmixerAsyncGetTrackPlayState(device,asyncID,trackNum)) SDL_Delay(100);
  SDL_Delay(1000);

  for(int i=1; i<=4; ++i){
    SDL_Log("music box note at: A%i",i+2);
    trackNum = kit_kmixerAsyncPlayPVS(device, asyncID, mboxA3, 0.0f, 0.7f,0.7f, (double)i);
    SDL_Delay(750);
    kit_kmixerAsyncStopTrack(device, asyncID, trackNum);
  }

  kit_kmixerAsyncSetTrackDeltaS2(device, asyncID, bgmTrack, -2*0.8);
  while(kit_kmixerAsyncGetActiveTracks(device,asyncID)) SDL_Delay(100);


  kit_kmixerDevicePauseAndWait(device);


  kit_acodecPCMDestroy(&mboxA3);
  kit_acodecPCMDestroy(&jingle);
  kit_acodecPCMDestroy(&choir);
  kit_acodecPCMDestroy(&bgm);
  kit_kmixerDeviceClose(&device);

  kit_kmixerQuit();
  kit_coreQuit();
  kit_coreLog("(If this is a nonzero value, that means there's a memory leak!)");
  SDL_Quit(); //kit_coreQuit includes SDL_Quit, but the above log itself seems to use heap
  kit_coreLog("# of allocations = %i",SDL_GetNumAllocations());
  return 0;
}