SDL2 Play float audio

SDL2Float32.c

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <assert.h>
#include <SDL2/SDL.h>  
#define SAMPLE_RATE 44100 
#define CHANNELS 1
#define BUFFER_SIZE 4096
#ifndef AUDIO_F32SYS
#define AUDIO_F32SYS    0x8120
#endif
size_t GetFileSize(char *fileName){FILE *fp = fopen(fileName, "rb");assert(fp != NULL);fseek(fp, 0L, SEEK_END);size_t currentFileSize = ftell(fp);rewind(fp);fclose(fp);return currentFileSize;}
void PlayRawAudio(size_t numberOfAudioSamples, float *audioSamples)
{
	if(SDL_Init(SDL_INIT_AUDIO) < 0)
	{
		SDL_Log("Failed to initialize SDL: %s", SDL_GetError());
		exit(-1);
	}
	SDL_AudioSpec desiredSpec, obtainedSpec;
	SDL_zero(desiredSpec);
	desiredSpec.freq = SAMPLE_RATE;
	desiredSpec.format = AUDIO_F32SYS;
	desiredSpec.channels = CHANNELS;
	desiredSpec.samples = BUFFER_SIZE;
	desiredSpec.callback = NULL;
	SDL_AudioDeviceID audioDevice = SDL_OpenAudioDevice(NULL, 0, &desiredSpec, &obtainedSpec, 0);
	if(audioDevice < 0)
	{
		SDL_Log("Failed to open audio device : %s", SDL_GetError());
		SDL_Quit();
		exit(-1);
	}
	
	/*Queue audio*/
	int bytesToWrite = numberOfAudioSamples * sizeof(float);
	if(SDL_QueueAudio(audioDevice, audioSamples, bytesToWrite) != 0)
	{
		SDL_Log("Failed to queue audio: (%s)",  SDL_GetError());
		SDL_CloseAudioDevice(audioDevice);
		SDL_Quit();
		exit(-1);
	}
	
	SDL_PauseAudioDevice(audioDevice, 0);
	while(SDL_GetAudioDeviceStatus(audioDevice) == SDL_AUDIO_PLAYING)
	{
		//SDL_Delay(100);
	}
	SDL_CloseAudioDevice(audioDevice);
	SDL_Quit();
}

int main()
{
	char *audioFileName = "GeneratedAudio/audioData.raw";
	size_t audioFileSize = GetFileSize(audioFileName);
	size_t numberOfAudioSamples = audioFileSize / sizeof(float); 
	float *audioSamples = calloc(numberOfAudioSamples, sizeof(float));
	FILE *audioInputFile = fopen(audioFileName, "r");assert(audioInputFile != NULL);
	
	float currentSample = 0;
	for(size_t i = 0; i < numberOfAudioSamples; i++)
	{
		fread(&currentSample, sizeof(float), 1, audioInputFile);
		audioSamples[i] = currentSample;	
	}
	
	PlayRawAudio(numberOfAudioSamples, audioSamples);
	
	printf("%ld %.3f\n",numberOfAudioSamples, currentSample);
	fclose(audioInputFile);
	free(audioSamples);
	return 0;
}

Note: Change Sample rate to change frequency and speed