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);
}
TRANSPORTDEC_ERROR transportDec_SetParam ( const HANDLE_TRANSPORTDEC hTp,
const TPDEC_PARAM param,
const INT value)
{
TRANSPORTDEC_ERROR error = TRANSPORTDEC_OK;
switch (param) {
case TPDEC_PARAM_MINIMIZE_DELAY:
if (value) {
hTp->flags |= TPDEC_MINIMIZE_DELAY;
} else {
hTp->flags &= ~TPDEC_MINIMIZE_DELAY;
}
break;
case TPDEC_PARAM_EARLY_CONFIG:
if (value) {
hTp->flags |= TPDEC_EARLY_CONFIG;
} else {
hTp->flags &= ~TPDEC_EARLY_CONFIG;
}
break;
case TPDEC_PARAM_IGNORE_BUFFERFULLNESS:
if (value) {
hTp->flags |= TPDEC_IGNORE_BUFFERFULLNESS;
} else {
hTp->flags &= ~TPDEC_IGNORE_BUFFERFULLNESS;
}
break;
case TPDEC_PARAM_SET_BITRATE:
hTp->avgBitRate = value;
break;
case TPDEC_PARAM_BURST_PERIOD:
hTp->burstPeriod = value;
break;
case TPDEC_PARAM_RESET:
{
int i;
for (i=0; i<(1*2); i++) {
FDKresetBitbuffer(&hTp->bitStream[i]);
hTp->auLength[i] = 0;
hTp->accessUnitAnchor[i] = 0;
}
hTp->flags &= ~(TPDEC_SYNCOK|TPDEC_LOST_FRAMES_PENDING);
if (hTp->transportFmt != TT_MP4_ADIF) {
hTp->flags &= ~TPDEC_CONFIG_FOUND;
}
hTp->remainder = 0;
hTp->avgBitRate = 0;
hTp->missingAccessUnits = 0;
hTp->numberOfRawDataBlocks = 0;
hTp->globalFramePos = 0;
hTp->holdOffFrames = 0;
}
break;
}
return error;
}
int dabWrite_EncodeHeader(HANDLE_DAB hDab,
HANDLE_FDK_BITSTREAM hBitStream,
int buffer_fullness,
int frame_length)
{
INT crcIndex = 0;
FDK_ASSERT(((frame_length+hDab->headerBits)/8)<0x2000); /*13 bit*/
FDK_ASSERT(buffer_fullness<0x800); /* 11 bit */
FDKcrcReset(&hDab->crcInfo);
// fprintf(stderr, "dabWrite_EncodeHeader() hDab->currentBlock=%d, frame_length=%d, buffer_fullness=%d\n",
// hDab->currentBlock, frame_length, buffer_fullness);
// if (hDab->currentBlock == 0) {
// //hDab->subFrameStartPrev=dabWrite_GetHeaderBits(hDab);
// fprintf(stderr, "header bits[%d] [%d]\n", hDab->subFrameStartPrev, hDab->subFrameStartPrev >> 3);
// FDKresetBitbuffer(hBitStream, BS_WRITER);
// }
//hDab->subFrameStartBit = FDKgetValidBits(hBitStream);
// fprintf(stderr, "dabWrite_EncodeHeader() hDab->subFrameStartBit=%d [%d]\n", hDab->subFrameStartBit, hDab->subFrameStartBit >> 3);
//hDab->subFrameStartBit = FDKgetValidBits(hBitStream);
/* Skip new header if this is raw data block 1..n */
if (hDab->currentBlock == 0)
{
FDKresetBitbuffer(hBitStream, BS_WRITER);
// fprintf(stderr, "dabWrite_EncodeHeader() after FDKresetBitbuffer=%d [%d]\n", FDKgetValidBits(hBitStream), FDKgetValidBits(hBitStream) >> 3);
/* fixed header */
FDKwriteBits(hBitStream, 0, 16); //header_firecode
FDKwriteBits(hBitStream, 0, 1); //rfa
FDKwriteBits(hBitStream, hDab->dac_rate, 1);
FDKwriteBits(hBitStream, hDab->sbr_flag, 1);
FDKwriteBits(hBitStream, hDab->aac_channel_mode, 1);
FDKwriteBits(hBitStream, hDab->ps_flag, 1);
FDKwriteBits(hBitStream, hDab->mpeg_surround_config, 3);
/* variable header */
int i;
for(i=0; i<hDab->num_raw_blocks; i++)
FDKwriteBits(hBitStream, 0, 12);
/* padding */
if (hDab->dac_rate == 0 || hDab->sbr_flag == 0) {
FDKwriteBits(hBitStream, 0, 4);
}
} /* End of DAB header */
hDab->subFrameStartBit = FDKgetValidBits(hBitStream);
FDK_ASSERT(FDKgetValidBits(hBitStream) % 8 == 0); //only aligned header
// fprintf(stderr, "dabWrite_EncodeHeader() FDKgetValidBits(hBitStream)=%d [%d]\n", FDKgetValidBits(hBitStream), FDKgetValidBits(hBitStream) >> 3);
return 0;
}
int adtsWrite_EncodeHeader(HANDLE_ADTS hAdts,
HANDLE_FDK_BITSTREAM hBitStream,
int buffer_fullness,
int frame_length)
{
INT crcIndex = 0;
hAdts->headerBits = adtsWrite_GetHeaderBits(hAdts);
FDK_ASSERT(((frame_length+hAdts->headerBits)/8)<0x2000); /*13 bit*/
FDK_ASSERT(buffer_fullness<0x800); /* 11 bit */
if (!hAdts->protection_absent) {
FDKcrcReset(&hAdts->crcInfo);
}
if (hAdts->currentBlock == 0) {
FDKresetBitbuffer(hBitStream, BS_WRITER);
}
hAdts->subFrameStartBit = FDKgetValidBits(hBitStream);
/* Skip new header if this is raw data block 1..n */
if (hAdts->currentBlock == 0)
{
FDKresetBitbuffer(hBitStream, BS_WRITER);
if (hAdts->num_raw_blocks == 0) {
crcIndex = adtsWrite_CrcStartReg(hAdts, hBitStream, 0);
}
/* fixed header */
FDKwriteBits(hBitStream, 0xFFF, 12);
FDKwriteBits(hBitStream, hAdts->mpeg_id, 1);
FDKwriteBits(hBitStream, hAdts->layer, 2);
FDKwriteBits(hBitStream, hAdts->protection_absent, 1);
FDKwriteBits(hBitStream, hAdts->profile, 2);
FDKwriteBits(hBitStream, hAdts->sample_freq_index, 4);
FDKwriteBits(hBitStream, hAdts->private_bit, 1);
FDKwriteBits(hBitStream, getChannelConfig(hAdts->channel_mode), 3);
FDKwriteBits(hBitStream, hAdts->original, 1);
FDKwriteBits(hBitStream, hAdts->home, 1);
/* variable header */
FDKwriteBits(hBitStream, hAdts->copyright_id, 1);
FDKwriteBits(hBitStream, hAdts->copyright_start, 1);
FDKwriteBits(hBitStream, (frame_length + hAdts->headerBits)>>3, 13);
FDKwriteBits(hBitStream, buffer_fullness, 11);
FDKwriteBits(hBitStream, hAdts->num_raw_blocks, 2);
if (!hAdts->protection_absent) {
int i;
/* End header CRC portion for single raw data block and write dummy zero values for unknown fields. */
if (hAdts->num_raw_blocks == 0) {
adtsWrite_CrcEndReg(hAdts, hBitStream, crcIndex);
} else {
for (i=0; i<hAdts->num_raw_blocks; i++) {
FDKwriteBits(hBitStream, 0, 16);
}
}
FDKwriteBits(hBitStream, 0, 16);
}
} /* End of ADTS header */
void
FDKsbrEnc_AssembleSbrBitstream( HANDLE_COMMON_DATA hCmonData,
HANDLE_FDK_CRCINFO hCrcInfo,
INT crcRegion,
UINT sbrSyntaxFlags)
{
USHORT crcReg = SBR_CRCINIT;
INT numCrcBits,i;
/* check if SBR is present */
if ( hCmonData==NULL )
return;
hCmonData->sbrFillBits = 0; /* Fill bits are written only for GA streams */
if ( sbrSyntaxFlags & SBR_SYNTAX_DRM_CRC )
{
/*
* Calculate and write DRM CRC
*/
FDKcrcEndReg( hCrcInfo, &hCmonData->sbrBitbuf, crcRegion );
FDKwriteBits( &hCmonData->tmpWriteBitbuf, FDKcrcGetCRC(hCrcInfo)^0xFF, SI_SBR_DRM_CRC_BITS );
}
else
{
if ( !(sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) )
{
/* Do alignment here, because its defined as part of the sbr_extension_data */
int sbrLoad = hCmonData->sbrHdrBits + hCmonData->sbrDataBits;
if ( sbrSyntaxFlags & SBR_SYNTAX_CRC ) {
sbrLoad += SI_SBR_CRC_BITS;
}
sbrLoad += 4; /* Do byte Align with 4 bit offset. ISO/IEC 14496-3:2005(E) page 39. */
hCmonData->sbrFillBits = (8 - (sbrLoad % 8)) % 8;
/*
append fill bits
*/
FDKwriteBits(&hCmonData->sbrBitbuf, 0, hCmonData->sbrFillBits );
FDK_ASSERT(FDKgetValidBits(&hCmonData->sbrBitbuf) % 8 == 4);
}
/*
calculate crc
*/
if ( sbrSyntaxFlags & SBR_SYNTAX_CRC ) {
FDK_BITSTREAM tmpCRCBuf = hCmonData->sbrBitbuf;
FDKresetBitbuffer( &tmpCRCBuf, BS_READER );
numCrcBits = hCmonData->sbrHdrBits + hCmonData->sbrDataBits + hCmonData->sbrFillBits;
for(i=0;i<numCrcBits;i++){
INT bit;
bit = FDKreadBits(&tmpCRCBuf,1);
crcAdvance(SBR_CRC_POLY,SBR_CRC_MASK,&crcReg,bit,1);
}
crcReg &= (SBR_CRC_RANGE);
/*
* Write CRC data.
*/
FDKwriteBits (&hCmonData->tmpWriteBitbuf, crcReg, SI_SBR_CRC_BITS);
}
}
FDKsyncCache(&hCmonData->tmpWriteBitbuf);
}
