#define MA_NO_DECODING
#define MA_NO_ENCODING
#define MINIAUDIO_IMPLEMENTATION
     #include "miniaudio.h"
#define DEVICE_FORMAT       ma_format_f32
#define DEVICE_CHANNELS     1
#define DEVICE_SAMPLE_RATE  48000
#include "miniaudio.h"


void data_callback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uint32 frameCount){
/*In playback mode copy data to pOutput. In capture mode read data from pInput. In full-duplex mode, both
pOutput and pInput will be valid and you can move data from pInput into pOutput. Never process more than
frameCount frames.*/

     static float saw = 0;
     float* Samples = pOutput; /* "Samples" is just a (castless in this case) cast of the "pOutput" float pointer */
     ma_uint32 SampleIndex;
     float freq = 50;
     float amp = 0.2;

     MA_ASSERT(pDevice->playback.channels == DEVICE_CHANNELS);

     for(SampleIndex = 0; SampleIndex < frameCount; SampleIndex++){
          saw=saw*(saw<(DEVICE_SAMPLE_RATE/freq)); /* zeroes out sq every (1/freq) */
          *Samples = saw/(DEVICE_SAMPLE_RATE/freq)*amp;
          saw++; /* increases sq >> so I have a rising sawthoot */
          Samples++;}

     (void)pInput;}

int main(){

     ma_device_config deviceConfig;
     ma_device device;


     /* audio output device configuration */
     deviceConfig = ma_device_config_init(ma_device_type_playback); /* initialize for playback (not capture) */
     deviceConfig.playback.format   = DEVICE_FORMAT;
     deviceConfig.playback.channels = DEVICE_CHANNELS;
     deviceConfig.sampleRate        = DEVICE_SAMPLE_RATE;
     deviceConfig.dataCallback      = data_callback; /* name of the callback function */
     /*deviceConfig.pUserData         = &sineWave;*/ /* this data is fed to data_callback (Can be accessed from the device object (device.pUserData) inside the callback) */
     /*************************************/

     /* audio output device initialization */
     if(ma_device_init(NULL, &deviceConfig, &device) != MA_SUCCESS){
          printf("Failed to open playback device.\n");
          return -4;}
     /**************************************/

     printf("== Device Name: %s\n", device.playback.name);
     printf("== Press Enter to start...");
     getchar();

     /* this is the actual sound start */
     if (ma_device_start(&device) != MA_SUCCESS) {
          printf("== Failed to start playback device.\n");
          ma_device_uninit(&device);
          return -5;}

     /* Do something here. Probably your program's main loop. */

     printf("~~~ You should hear sound now ~~~\n");
     printf("== Press Enter to quit...");
     getchar();

     ma_device_uninit(&device); /* turn off sound */

    return 0;}