EasyAACEncoder/PcmToAac.cpp at master · sin-z/EasyAACEncoder · GitHub

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#include "PcmToAac.h"

#include "outDebug.h"

PcmToAac::PcmToAac(void)
{
	m_nInputSamples=0;
	m_nMaxOutputBytes=0;
	m_nPCMBitSize = 16;
}


PcmToAac::~PcmToAac(void)
{
	if (NULL != hEncoder)
	{
		/*Close FAAC engine*/
		faacEncClose(hEncoder);
	}

}

bool PcmToAac::Init(InAudioInfo* info)
{
	unsigned int objectType = LOW;
	unsigned int mpegVersion = MPEG2;
	static unsigned int useTns = 0; //#define DEFAULT_TNS     0

	//TODO: config this
	unsigned int nChannels = /*1*/info->Channel();

	m_nPCMBitSize = /*16*/ info->PCMBitSize();
	unsigned long nInputSamples = 0;
	unsigned long nSampleRate = /*8000*/info->Samplerate();
	unsigned long nMaxOutputBytes = 0;


	/*open FAAC engine*/
	hEncoder = faacEncOpen(nSampleRate, nChannels, &nInputSamples, &nMaxOutputBytes);
	if (hEncoder == NULL)
	{
		if(AAC_DEBUG) printf("%s:[%d] failed to call faacEncOpen !\n", __FUNCTION__, __LINE__);
		//return -1;
		return false;
	}
	m_nInputSamples = nInputSamples;
	m_nMaxOutputBytes = nMaxOutputBytes;


	/*get current encoding configuration*/
	pConfiguration = faacEncGetCurrentConfiguration(hEncoder);
	pConfiguration->inputFormat = FAAC_INPUT_16BIT;

	/*0 - raw; 1 - ADTS*/
	pConfiguration->outputFormat = 1;
	pConfiguration->useTns = useTns;
	pConfiguration->aacObjectType = objectType;
	pConfiguration->mpegVersion = mpegVersion;

	/*set encoding configuretion*/
	faacEncSetConfiguration(hEncoder, pConfiguration);

	return true;
}

int PcmToAac::Encode(int32_t * pbPCMBuffer, unsigned int nPCMBufferSize, unsigned char * pbAACBuffer, unsigned int nMaxOutputBytes)
{
	unsigned int nPCMBitSize = GetPCMBitSize();


	unsigned int nInputSamples = (nPCMBufferSize / (nPCMBitSize / 8));
	if(AAC_DEBUG) printf("%s:[%d] G711A -> PCM faacEncEncode....\n",  __FUNCTION__, __LINE__);
	int nRet = faacEncEncode(hEncoder, (int*) pbPCMBuffer, nInputSamples, pbAACBuffer, nMaxOutputBytes);
	if(AAC_DEBUG) printf("%s:[%d] G711A -> PCM faacEncEncode\n",  __FUNCTION__, __LINE__);

	return nRet;
}