void ZAAC::Init(ZFLV *flv,ZMP4 *mp4)//,ZRTMP*rtmp)
{
m_flv=flv;
m_mp4=mp4;
//m_rtmp=rtmp;
nSampleRate = 44100; // 采样率
nChannels = 2; // 声道数
nPCMBitSize = 16; // 单样本位数
ULONG nInputSamples = 0;//样本数
nMaxOutputBytes = 0;
ULONG nPCMByteSize=0;
hEncoder = faacEncOpen(nSampleRate, nChannels, &nInputSamples, &nMaxOutputBytes);
pConfiguration = faacEncGetCurrentConfiguration(hEncoder);
pConfiguration->inputFormat = FAAC_INPUT_16BIT;
pConfiguration->outputFormat=0;//0raw 1adst
pConfiguration->useTns=true;
pConfiguration->useLfe=false;
pConfiguration->aacObjectType=LOW;
pConfiguration->shortctl=SHORTCTL_NORMAL;
pConfiguration->quantqual=100;
pConfiguration->bandWidth=0;
pConfiguration->bitRate=0;
faacEncSetConfiguration(hEncoder, pConfiguration);
nPCMByteSize=nInputSamples*nPCMBitSize/8;
pbAACBuffer=(BYTE*)malloc(nMaxOutputBytes);
UINT SampIndex=GetSRIndex(nSampleRate);
FLVAACADST m_flvadst={0};
m_flvadst.OBjecttype=2;
m_flvadst.SamplIndex1=SampIndex>>1&0x03;
m_flvadst.SamplIndex2=SampIndex&0x01;
m_flvadst.channel=nChannels;
if(m_flv)
m_flv->InitAAC((unsigned char*)&m_flvadst,2,clock());
if (m_mp4)
m_mp4->InitAAC((unsigned char*)&m_flvadst,2,clock());
//if (m_rtmp)
// m_rtmp->InitAAC((unsigned char*)&m_flvadst,2,clock());
IsPlay=true;
}
faacEncHandle FAACAPI faacEncOpen(unsigned long sampleRate,
unsigned int numChannels,
unsigned long *inputSamples,
unsigned long *maxOutputBytes)
{
unsigned int channel;
faacEncHandle hEncoder;
*inputSamples = FRAME_LEN*numChannels;
*maxOutputBytes = (6144/8)*numChannels;
#ifdef DRM
*maxOutputBytes += 1; /* for CRC */
#endif
hEncoder = (faacEncStruct*)AllocMemory(sizeof(faacEncStruct));
SetMemory(hEncoder, 0, sizeof(faacEncStruct));
hEncoder->numChannels = numChannels;
hEncoder->sampleRate = sampleRate;
hEncoder->sampleRateIdx = GetSRIndex(sampleRate);
/* Initialize variables to default values */
hEncoder->frameNum = 0;
hEncoder->flushFrame = 0;
/* Default configuration */
hEncoder->config.version = FAAC_CFG_VERSION;
hEncoder->config.name = libfaacName;
hEncoder->config.copyright = libCopyright;
hEncoder->config.mpegVersion = MPEG4;
hEncoder->config.aacObjectType = LTP;
hEncoder->config.allowMidside = 1;
hEncoder->config.useLfe = 1;
hEncoder->config.useTns = 0;
hEncoder->config.bitRate = 0; /* default bitrate / channel */
hEncoder->config.bandWidth = bwfac * hEncoder->sampleRate;
if (hEncoder->config.bandWidth > bwbase)
hEncoder->config.bandWidth = bwbase;
hEncoder->config.quantqual = 100;
hEncoder->config.psymodellist = (psymodellist_t *)psymodellist;
hEncoder->config.psymodelidx = 0;
hEncoder->psymodel =
hEncoder->config.psymodellist[hEncoder->config.psymodelidx].model;
hEncoder->config.shortctl = SHORTCTL_NORMAL;
/* default channel map is straight-through */
for( channel = 0; channel < 64; channel++ )
hEncoder->config.channel_map[channel] = channel;
/*
by default we have to be compatible with all previous software
which assumes that we will generate ADTS
/AV
*/
hEncoder->config.outputFormat = 1;
/*
be compatible with software which assumes 24bit in 32bit PCM
*/
hEncoder->config.inputFormat = FAAC_INPUT_32BIT;
/* find correct sampling rate depending parameters */
hEncoder->srInfo = &srInfo[hEncoder->sampleRateIdx];
for (channel = 0; channel < numChannels; channel++)
{
hEncoder->coderInfo[channel].prev_window_shape = SINE_WINDOW;
hEncoder->coderInfo[channel].window_shape = SINE_WINDOW;
hEncoder->coderInfo[channel].block_type = ONLY_LONG_WINDOW;
hEncoder->coderInfo[channel].num_window_groups = 1;
hEncoder->coderInfo[channel].window_group_length[0] = 1;
/* FIXME: Use sr_idx here */
hEncoder->coderInfo[channel].max_pred_sfb = GetMaxPredSfb(hEncoder->sampleRateIdx);
hEncoder->sampleBuff[channel] = NULL;
hEncoder->nextSampleBuff[channel] = NULL;
hEncoder->next2SampleBuff[channel] = NULL;
hEncoder->ltpTimeBuff[channel] = (double*)AllocMemory(2*BLOCK_LEN_LONG*sizeof(double));
SetMemory(hEncoder->ltpTimeBuff[channel], 0, 2*BLOCK_LEN_LONG*sizeof(double));
}
/* Initialize coder functions */
fft_initialize( &hEncoder->fft_tables );
hEncoder->psymodel->PsyInit(&hEncoder->gpsyInfo, hEncoder->psyInfo, hEncoder->numChannels,
hEncoder->sampleRate, hEncoder->srInfo->cb_width_long,
hEncoder->srInfo->num_cb_long, hEncoder->srInfo->cb_width_short,
hEncoder->srInfo->num_cb_short);
FilterBankInit(hEncoder);
TnsInit(hEncoder);
LtpInit(hEncoder);
PredInit(hEncoder);
AACQuantizeInit(hEncoder->coderInfo, hEncoder->numChannels,
&(hEncoder->aacquantCfg));
HuffmanInit(hEncoder->coderInfo, hEncoder->numChannels);
/* Return handle */
return hEncoder;
}
