uint8 PV_LATM_Parser::composeSingleFrame(PVMFSharedMediaDataPtr& mediaDataIn)
{
int32 tmp = 0;
//changed
OsclRefCounterMemFrag memFragIn;
mediaDataIn->getMediaFragment(0, memFragIn);
// pool made for output data
OsclRefCounterMemFrag memFragOut;
mediaDataOut->getMediaFragment(0, memFragOut);
//uint8 * myData = newpkt->data;
uint8 * myData = (uint8*)memFragIn.getMemFrag().ptr;
/*
* Total Payload length, in bytes, includes
* length of the AudioMuxElement()
* AudioMuxElement()
* Other data (for RF3016 not supported)
*/
int32 pktsize = memFragIn.getMemFrag().len;
int32 m_bit = mediaDataIn->getMarkerInfo();
/*
* All streams have same time framing (there is only one stream anyway)
*/
if (firstBlock)
{
/*
* AudioMuxElement() fits in a single rtp packet or this is the first
* block of an AudioMuxElement() spread accross more than one rtp packet
*/
int32 bUsed = 0;
/*
* PayLoadlenghtInfo( )
*/
do
{
tmp = *(myData++); /* get payload lenght 8-bit in bytes */
framesize += tmp;
bUsed++;
}
while (tmp == 0xff); /* 0xff is the escape sequence for values bigger than 255 */
/*
* PayLoadMux( )
*/
bytesRead = (pktsize - bUsed);
// framesize must be equal to the bytesRead if mbit is 1
// or greater than bytesRead if mbit is 0
if ((m_bit && framesize != bytesRead && !sMC->otherDataPresent) ||
(!m_bit && framesize < bytesRead && !sMC->otherDataPresent))
{
// to update number of bytes copied
memFragOut.getMemFrag().len = 0;
mediaDataOut->setMediaFragFilledLen(0, 0);
bytesRead = 0;
return FRAME_ERROR;
}
oscl_memcpy((uint8*)memFragOut.getMemFrag().ptr, myData, bytesRead); //ptr +1 changed
if (sMC->otherDataPresent)
{
; /* dont' care at this point, no MUX other than aac supported */
}
}
else
{
/*
* We have an AudioMuxElement() spread accross more than one rtp packet
*/
if ((m_bit && framesize != pktsize + (bytesRead - 1) && !sMC->otherDataPresent) /* last block */ ||
(!m_bit && framesize < pktsize + (bytesRead - 1) && !sMC->otherDataPresent) /* intermediate block */)
{
// to update number of bytes copied
memFragOut.getMemFrag().len = 0;
mediaDataOut->setMediaFragFilledLen(0, 0);
return FRAME_ERROR;
}
/*
* Accumulate blocks until the full frame is complete
*/
oscl_memcpy((uint8*)memFragOut.getMemFrag().ptr + bytesRead, myData, pktsize);
bytesRead += pktsize;
}
// to update number of bytes copied
memFragOut.getMemFrag().len = bytesRead;
mediaDataOut->setMediaFragFilledLen(0, bytesRead);
mediaDataOut->setSeqNum(mediaDataIn->getSeqNum());
mediaDataOut->setTimestamp(mediaDataIn->getTimestamp());
firstBlock = false; /* we already processed the first block, so this should be false */
if (m_bit) /* check if it is a complete packet (m bit ==1) */
{
firstBlock = true; /* if m-bit is "1", then the farme fits in a block or this was the last
block of the frame, set for next call */
framesize = 0;
frameNum = 0;
bytesRead = 0;
compositenumframes = 0;
}
else
{
/*
* We have an AudioMuxElement() spread accross more than one rtp packet
*/
compositenumframes++;
if (compositenumframes < MAX_NUM_COMPOSITE_FRAMES)
{
// this is not yet a finished packet
return FRAME_INCOMPLETE;
}
else
{
return FRAME_ERROR;
}
}
return FRAME_COMPLETE;
}
/* ======================================================================== */
uint8 PV_LATM_Parser::composeMultipleFrame(PVMFSharedMediaDataPtr& mediaDataIn)
{
uint32 tmp;
uint8 * myData;
uint32 i;
OsclRefCounterMemFrag memFragIn;
mediaDataIn->getMediaFragment(0, memFragIn);
// pool made for output data
OsclRefCounterMemFrag memFragOut;
mediaDataOut->getMediaFragment(0, memFragOut);
int32 pktsize = memFragIn.getMemFrag().len;
// make sure we have enough memory to hold the data
if (bytesRead + pktsize > currSize)
{
uint8 * tempPtr = (uint8*) oscl_calloc(bytesRead + pktsize, sizeof(uint8));
if (tempPtr == NULL)
{
// memory problem?
return FRAME_ERROR;
}
currSize = bytesRead + pktsize;
oscl_memcpy(tempPtr, multiFrameBuf, bytesRead);
oscl_free(multiFrameBuf);
multiFrameBuf = tempPtr;
}
oscl_memcpy(multiFrameBuf + bytesRead, memFragIn.getMemFrag().ptr, pktsize);
bytesRead += pktsize;
//newpkt->frame_size = bytesRead;
// to update number of bytes copied
memFragOut.getMemFrag().len = bytesRead;
mediaDataOut->setMediaFragFilledLen(0, bytesRead);
mediaDataOut->setSeqNum(mediaDataIn->getSeqNum());
mediaDataOut->setTimestamp(mediaDataIn->getTimestamp());
if (mediaDataIn->getMarkerInfo())
{
// means this is the last packet for this audioMuxElement
myData = multiFrameBuf;
uint32 outPtrPos = 0;
for (i = 0;i <= sMC->numSubFrames;i++)
{
framesize = 0;
do
{
tmp = *(myData);
framesize += tmp;
}
while (*(myData++) == 0xff);
//int32 bUsed = (framesize/255)+1; // 0-254: 1, 255-511: 2 ...
// do a check on the last one
if (i == sMC->numSubFrames && !sMC->otherDataPresent)
{
if (framesize != bytesRead - (myData - multiFrameBuf))
{
// to update number of bytes copied
memFragOut.getMemFrag().len = 0;
mediaDataOut->setMediaFragFilledLen(0, 0);
return FRAME_INCOMPLETE;
}
}
oscl_memcpy((uint8*)memFragOut.getMemFrag().ptr + outPtrPos, myData, framesize);
myData += framesize;
outPtrPos += framesize;
}
// to update number of bytes copied
memFragOut.getMemFrag().len = outPtrPos;
mediaDataOut->setMediaFragFilledLen(0, outPtrPos);
bytesRead = 0;
framesize = 0;
compositenumframes = 0;
}
else
{
compositenumframes++;
if (compositenumframes < MAX_NUM_COMPOSITE_FRAMES)
{
return FRAME_INCOMPLETE;
}
else
{
return FRAME_ERROR;
}
}
return FRAME_COMPLETE;
}
OSCL_EXPORT_REF uint8 PV_LATM_Parser::compose(PVMFSharedMediaDataPtr& mediaDataIn)
{
uint8 retVal = 0;
OsclRefCounterMemFrag memFragIn;
mediaDataIn->getMediaFragment(0, memFragIn);
// Don't need the ref to iMediaData so unbind it
mediaDataOut.Unbind();
int errcode = 0;
OsclSharedPtr<PVMFMediaDataImpl> mediaDataImpl;
OSCL_TRY_NO_TLS(iOsclErrorTrapImp, errcode, mediaDataImpl = iMediaDataSimpleAlloc.allocate((uint32)memFragIn.getMemFrag().len));
OSCL_FIRST_CATCH_ANY(errcode, return FRAME_OUTPUTNOTAVAILABLE);
errcode = 0;
OSCL_TRY_NO_TLS(iOsclErrorTrapImp, errcode, mediaDataOut = PVMFMediaData::createMediaData(mediaDataImpl, &iMediaDataMemPool));
OSCL_FIRST_CATCH_ANY(errcode, return FRAME_OUTPUTNOTAVAILABLE);
OsclRefCounterMemFrag memFragOut;
mediaDataOut->getMediaFragment(0, memFragOut);
/*
* Latch for very first packet, sequence number is not established yet.
*/
int32 seqNum = mediaDataIn->getSeqNum();
if (!firstPacket)
{
if ((seqNum - last_sequence_num) > 1) /* detect any gap in sequence */
{
// means we missed an RTP packet.
dropFrames = true;
}
}
else
{
firstPacket = false;
}
last_timestamp = mediaDataIn->getTimestamp();
last_sequence_num = seqNum;
last_mbit = mediaDataIn->getMarkerInfo();
if (dropFrames)
{
if (mediaDataIn->getMarkerInfo())
{
/*
* try to recover packet as sequencing was broken, new packet could be valid
* it is possible that the received packet contains a complete audioMuxElement()
* so try to retrieve it.
*/
dropFrames = false;
}
else
{
/*
* we are in the middle of a spread audioMuxElement(), or faulty rtp header
* return error
*/
framesize = 0;
frameNum = 0;
bytesRead = 0;
compositenumframes = 0;
/*
* Drop frame as we are not certain if it is a valid frame
*/
memFragOut.getMemFrag().len = 0;
mediaDataOut->setMediaFragFilledLen(0, 0);
firstBlock = true; // set for next call
return FRAME_ERROR;
}
}
if (sMC->numSubFrames > 0 || (sMC->cpresent == 1 && ((*(uint8*)(memFragIn.getMemFrag().ptr)) &(0x80))))
{
// this is a less efficient version that must be used when you know an AudioMuxElement has
// more than one subFrame -- I also added the case where the StreamMuxConfig is inline
// The reason for this is that the StreamMuxConfig can be possibly large and there is no
// way to know its size without parsing it. (the problem is it can straddle an RTP boundary)
// it is less efficient because it composes the AudioMuxElement in a separate buffer (one
// oscl_memcpy() per rtp packet) then parses it (one oscl_memcpy() per audio frame to the output
// buffer (newpkt->outptr)) when it gets a whole AudioMuxElement.
// The function below does a oscl_memcpy() directly into the output buffer
// note, composeMultipleFrame will also work for the simple case in case there is another reason
// to have to use it..
retVal = composeMultipleFrame(mediaDataIn);
}
else
{
// this is an efficient version that can be used when you know an AudioMuxElement has
// only one subFrame
retVal = composeSingleFrame(mediaDataIn);
}
// set this to drop frames in the future -- till we find another marker bit
if (retVal == FRAME_ERROR)
{
dropFrames = true;
framesize = 0;
frameNum = 0;
bytesRead = 0;
compositenumframes = 0;
//changed
memFragOut.getMemFrag().len = 0;
mediaDataOut->setMediaFragFilledLen(0, 0);
firstBlock = true; // set for next call
}
return retVal;
}
