INT dabWrite_Init(HANDLE_DAB hDab, CODER_CONFIG *config)
{
/* Sanity checks */
if((int)config->aot > 4
|| (int)config->aot < 1 ) {
return -1;
}
/* Sanity checks DAB-specific */
if ( !(config->nSubFrames == 2 && config->samplingRate == 16000 && (config->flags & CC_SBR)) &&
!(config->nSubFrames == 3 && config->samplingRate == 24000 && (config->flags & CC_SBR)) &&
!(config->nSubFrames == 4 && config->samplingRate == 32000) &&
!(config->nSubFrames == 6 && config->samplingRate == 48000)) {
return -1;
}
hDab->dac_rate = 0;
hDab->aac_channel_mode=0;
hDab->sbr_flag = 0;
hDab->ps_flag = 0;
hDab->mpeg_surround_config=0;
hDab->subchannels_num=config->bitRate/8000;
if(config->samplingRate == 24000 || config->samplingRate == 48000)
hDab->dac_rate = 1;
if (config->extAOT==AOT_SBR || config->extAOT == AOT_PS)
hDab->sbr_flag = 1;
if(config->extAOT == AOT_PS)
hDab->ps_flag = 1;
if(config->channelMode == MODE_2)
hDab->aac_channel_mode = 1;
fprintf(stderr, "hDab->dac_rate=%d\n", hDab->dac_rate);
fprintf(stderr, "hDab->sbr_flag=%d\n", hDab->sbr_flag);
fprintf(stderr, "hDab->ps_flag=%d\n", hDab->ps_flag);
fprintf(stderr, "hDab->aac_channel_mode=%d\n", hDab->aac_channel_mode);
fprintf(stderr, "hDab->subchannels_num=%d\n", hDab->subchannels_num);
fprintf(stderr, "cc->nSubFrames=%d\n", config->nSubFrames);
hDab->num_raw_blocks=config->nSubFrames-1; /* 0 means 1 raw data block */
FDKcrcInit(&hDab->crcInfo, 0x1021, 0xFFFF, 16);
FDKcrcInit(&hDab->crcFire, 0x782d, 0, 16);
FDKcrcInit(&hDab->crcInfo2, 0x8005, 0xFFFF, 16);
hDab->currentBlock = 0;
hDab->headerBits = dabWrite_GetHeaderBits(hDab);
return 0;
}
INT FDKsbrEnc_InitSbrBitstream(HANDLE_COMMON_DATA hCmonData,
UCHAR *memoryBase, /*!< Pointer to bitstream buffer */
INT memorySize, /*!< Length of bitstream buffer in bytes */
HANDLE_FDK_CRCINFO hCrcInfo,
UINT sbrSyntaxFlags) /*!< SBR syntax flags */
{
INT crcRegion = 0;
/* reset bit buffer */
FDKresetBitbuffer(&hCmonData->sbrBitbuf, BS_WRITER);
FDKinitBitStream(&hCmonData->tmpWriteBitbuf, memoryBase,
memorySize, 0, BS_WRITER);
if (sbrSyntaxFlags & SBR_SYNTAX_CRC) {
if (sbrSyntaxFlags & SBR_SYNTAX_DRM_CRC)
{ /* Init and start CRC region */
FDKwriteBits (&hCmonData->sbrBitbuf, 0x0, SI_SBR_DRM_CRC_BITS);
FDKcrcInit( hCrcInfo, 0x001d, 0xFFFF, SI_SBR_DRM_CRC_BITS );
crcRegion = FDKcrcStartReg( hCrcInfo, &hCmonData->sbrBitbuf, 0 );
} else {
FDKwriteBits (&hCmonData->sbrBitbuf, 0x0, SI_SBR_CRC_BITS);
}
}
return (crcRegion);
}
/*
* Read the extension for height info.
* return 0 if successfull or -1 if the CRC failed.
*/
static
int CProgramConfig_ReadHeightExt(
CProgramConfig *pPce,
HANDLE_FDK_BITSTREAM bs,
int * const bytesAvailable,
const UINT alignmentAnchor
)
{
int err = 0;
FDK_CRCINFO crcInfo; /* CRC state info */
INT crcReg;
FDKcrcInit(&crcInfo, 0x07, 0xFF, 8);
crcReg = FDKcrcStartReg(&crcInfo, bs, 0);
UINT startAnchor = FDKgetValidBits(bs);
FDK_ASSERT(pPce != NULL);
FDK_ASSERT(bs != NULL);
FDK_ASSERT(bytesAvailable != NULL);
if ( (startAnchor >= 24) && (*bytesAvailable >= 3)
&& (FDKreadBits(bs,8) == PCE_HEIGHT_EXT_SYNC) )
{
int i;
for (i=0; i < pPce->NumFrontChannelElements; i++)
{
pPce->FrontElementHeightInfo[i] = (UCHAR) FDKreadBits(bs,2);
}
for (i=0; i < pPce->NumSideChannelElements; i++)
{
pPce->SideElementHeightInfo[i] = (UCHAR) FDKreadBits(bs,2);
}
for (i=0; i < pPce->NumBackChannelElements; i++)
{
pPce->BackElementHeightInfo[i] = (UCHAR) FDKreadBits(bs,2);
}
FDKbyteAlign(bs, alignmentAnchor);
FDKcrcEndReg(&crcInfo, bs, crcReg);
if ((USHORT)FDKreadBits(bs,8) != FDKcrcGetCRC(&crcInfo)) {
/* CRC failed */
err = -1;
}
}
else {
/* No valid extension data found -> restore the initial bitbuffer state */
FDKpushBack(bs, startAnchor - FDKgetValidBits(bs));
}
/* Always report the bytes read. */
*bytesAvailable -= (startAnchor - FDKgetValidBits(bs)) >> 3;
return (err);
}
INT adtsWrite_Init(HANDLE_ADTS hAdts, CODER_CONFIG *config)
{
/* Sanity checks */
if ( config->nSubFrames < 1
|| config->nSubFrames > 4
|| (int)config->aot > 4
|| (int)config->aot < 1 ) {
return -1;
}
/* fixed header */
if (config->flags & CC_MPEG_ID) {
hAdts->mpeg_id = 0; /* MPEG 4 */
} else {
hAdts->mpeg_id = 1; /* MPEG 2 */
}
hAdts->layer=0;
hAdts->protection_absent = ! (config->flags & CC_PROTECTION);
hAdts->profile = ((int)config->aot) - 1;
hAdts->sample_freq_index = getSamplingRateIndex(config->samplingRate);
hAdts->sample_freq = config->samplingRate;
hAdts->private_bit=0;
hAdts->channel_mode = config->channelMode;
hAdts->original=0;
hAdts->home=0;
/* variable header */
hAdts->copyright_id=0;
hAdts->copyright_start=0;
hAdts->num_raw_blocks=config->nSubFrames-1; /* 0 means 1 raw data block */
FDKcrcInit(&hAdts->crcInfo, 0x8005, 0xFFFF, 16);
hAdts->currentBlock = 0;
return 0;
}
void adtsRead_CrcInit(HANDLE_ADTS pAdts) /*!< pointer to adts crc info stucture */
{
FDKcrcInit(&pAdts->crcInfo, 0x8005, 0xFFFF, 16);
}
