faac编码aac

// faacode.cpp : 定义控制台应用程序的入口点。

//



#include "stdafx.h"

#include <faac.h>

#include <stdio.h>



typedef unsigned long   ULONG;

typedef unsigned int    UINT;

typedef unsigned char   BYTE;

//typedef char            _TCHAR;



#pragma comment(lib,"libfaac.lib")



int main(int argc, _TCHAR* argv[])

{

	ULONG nSampleRate = 44100;  // 采样率

	UINT nChannels = 2;         // 声道数

	UINT nPCMBitSize = 16;      // 单样本位数

	ULONG nInputSamples = 0;

	ULONG nMaxOutputBytes = 0;



	int nRet;

	faacEncHandle hEncoder;

	faacEncConfigurationPtr pConfiguration; 



	int nBytesRead;

	int nPCMBufferSize;

	BYTE* pbPCMBuffer;

	BYTE* pbAACBuffer;



	FILE* fpIn; // WAV file for input

	FILE* fpOut; // AAC file for output



	fpIn = fopen("test.wav", "rb");//  resample.pcm

	fpOut = fopen("test.aac", "wb");//  resample.aac



	// (1) Open FAAC engine

	hEncoder = faacEncOpen(nSampleRate, nChannels, &nInputSamples, &nMaxOutputBytes);

	if(hEncoder == NULL)

	{

		printf("[ERROR] Failed to call faacEncOpen()\n");

		return -1;

	}



	nPCMBufferSize = nInputSamples * nPCMBitSize / 8;

	pbPCMBuffer = new BYTE [nPCMBufferSize];

	pbAACBuffer = new BYTE [nMaxOutputBytes];



	// (2.1) Get current encoding configuration

	pConfiguration = faacEncGetCurrentConfiguration(hEncoder);

	

	pConfiguration->inputFormat = FAAC_INPUT_16BIT;



	// (2.2) Set encoding configuration

	nRet = faacEncSetConfiguration(hEncoder, pConfiguration);



	//如果是wav格式,先读取前面的

	fseek(fpIn,58,SEEK_SET);

	for(int i = 0; 1; i++)

	{

		// 读入的实际字节数，最大不会超过nPCMBufferSize，
		nBytesRead = fread(pbPCMBuffer, 1, nPCMBufferSize, fpIn);

		// 输入样本数，用实际读入字节数计算，一般只有读到文件尾时才不是nPCMBufferSize/(nPCMBitSize/8);

		nInputSamples = nBytesRead / (nPCMBitSize / 8);

		// (3) Encode

		nRet = faacEncEncode(

			hEncoder, (int*) pbPCMBuffer, nInputSamples, pbAACBuffer, nMaxOutputBytes);



		fwrite(pbAACBuffer, 1, nRet, fpOut);



		printf("%d: faacEncEncode returns %d\n", i, nRet);



		if(nBytesRead <= 0)

		{

			break;

		}

	}







	// (4) Close FAAC engine

	nRet = faacEncClose(hEncoder);



	delete[] pbPCMBuffer;

	delete[] pbAACBuffer;

	fclose(fpIn);

	fclose(fpOut);



	//getchar();



	return 0;

}