Homebrew [Dev Question] Initializing MAD?

[YugamiSekai]

I'm trying to create a way to play a MP3 file with libMAD but I can't find anything on google about how to initialize it other than the official documentation which I still get errors afterwards. This is what I have so far:

/* MAD and LibCTRU streaming example
*  Author: Kaleb Provost (kprovost7314)
*  Desc: A PoC that plays MP3 Files
*/
#include <3ds.h>
#include <stdio.h>
#include <mad.h>

#include "Bokuboku_mp3.h"

struct mad_decoder decode;
struct mad_stream stream;
struct mad_header header;
struct mad_pcm output;



struct buffer {

	unsigned char const *start;
	unsigned long length;
};

struct buffer bufferData;

int main(int argc, char **argv)
{
	//Initialize gfx (note: not needed if you're using SF2Dlib)
	gfxInitDefault();
	
	consoleInit(GFX_TOP, NULL);
	printf("Streaming A MP3 file with MAD and LibCTRU\n");
	
	csndInit();
	mad_decoder_init(&decode, &bufferData, stream, 0, 0, output, 0, 0);

	
	// Main loop
	while (aptMainLoop())
	{
		//Scan all the inputs. This should be done once for each frame
		hidScanInput();
		
		//hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
		//hidKeysHeld returns information about which buttons are currently pressed (regardless if they were pressed or not pressed in the previous frame)
		//hidKeysUp returns information about which buttons are not pressed but were pressed in the previous frame
		u32 kDown = hidKeysDown();
		
		
		
		if (kDown & KEY_START) break; // break in order to return to hbmenu
		// YOU WANT TO LEAVE ME?????
		/*
		I'11 FL00D thE // SYSTEM f0r3v3r
		JK, Y0u'11 c0M3 b4ck
		1 kn0w y0u wi11
		*/
		
		
		// Flush and swap framebuffers, this is needed for rendering these will not be needed when using SF2D lib
		gfxFlushBuffers();
		gfxSwapBuffers();
		
		//Wait for VBlank, this is needed for rendering these will not be needed when using SF2D lib
		gspWaitForVBlank();
	}
	mad_decoder_finish(&decode);
	gfxExit();
	return 0;
}

How do I initialize it?