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rtphint.cpp
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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is MPEG4IP.
*
* The Initial Developer of the Original Code is Cisco Systems Inc.
* Portions created by Cisco Systems Inc. are
* Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
*
* Contributor(s):
* Dave Mackie [email protected]
*/
#include "src/impl.h"
namespace mp4v2 {
namespace impl {
///////////////////////////////////////////////////////////////////////////////
/* rtp hint track operations */
MP4RtpHintTrack::MP4RtpHintTrack(MP4File& file, MP4Atom& trakAtom)
: MP4Track(file, trakAtom)
{
m_pRefTrack = NULL;
m_pRtpMapProperty = NULL;
m_pPayloadNumberProperty = NULL;
m_pMaxPacketSizeProperty = NULL;
m_pSnroProperty = NULL;
m_pTsroProperty = NULL;
m_pReadHint = NULL;
m_pReadHintSample = NULL;
m_readHintSampleSize = 0;
m_pWriteHint = NULL;
m_writeHintId = MP4_INVALID_SAMPLE_ID;
m_writePacketId = 0;
m_pTrpy = NULL;
m_pNump = NULL;
m_pTpyl = NULL;
m_pMaxr = NULL;
m_pDmed = NULL;
m_pDimm = NULL;
m_pPmax = NULL;
m_pDmax = NULL;
m_pMaxPdu = NULL;
m_pAvgPdu = NULL;
m_pMaxBitRate = NULL;
m_pAvgBitRate = NULL;
m_thisSec = 0;
m_bytesThisSec = 0;
m_bytesThisHint = 0;
m_bytesThisPacket = 0;
}
MP4RtpHintTrack::~MP4RtpHintTrack()
{
delete m_pReadHint; m_pReadHint = NULL;
MP4Free( m_pReadHintSample ); m_pReadHintSample = NULL;
delete m_pWriteHint; m_pWriteHint = NULL;
}
void MP4RtpHintTrack::InitRefTrack()
{
if (m_pRefTrack == NULL) {
MP4Integer32Property* pRefTrackIdProperty = NULL;
(void)m_trakAtom.FindProperty(
"trak.tref.hint.entries[0].trackId",
(MP4Property**)&pRefTrackIdProperty);
ASSERT(pRefTrackIdProperty);
m_pRefTrack = m_File.GetTrack(pRefTrackIdProperty->GetValue());
}
}
void MP4RtpHintTrack::InitRtpStart()
{
number::srandom( time::getLocalTimeMilliseconds() );
(void)m_trakAtom.FindProperty(
"trak.udta.hnti.rtp .snro.offset",
(MP4Property**)&m_pSnroProperty);
if (m_pSnroProperty) {
m_rtpSequenceStart = m_pSnroProperty->GetValue();
} else {
m_rtpSequenceStart = number::random32();
}
(void)m_trakAtom.FindProperty(
"trak.udta.hnti.rtp .tsro.offset",
(MP4Property**)&m_pTsroProperty);
if (m_pTsroProperty) {
m_rtpTimestampStart = m_pTsroProperty->GetValue();
} else {
m_rtpTimestampStart = number::random32();
}
}
void MP4RtpHintTrack::ReadHint(
MP4SampleId hintSampleId,
uint16_t* pNumPackets)
{
if (m_pRefTrack == NULL) {
InitRefTrack();
InitRtpStart();
}
// dispose of any old hint
delete m_pReadHint; m_pReadHint = NULL;
MP4Free( m_pReadHintSample ); m_pReadHintSample = NULL;
m_readHintSampleSize = 0;
// read the desired hint sample into memory
ReadSample(
hintSampleId,
&m_pReadHintSample,
&m_readHintSampleSize,
&m_readHintTimestamp);
m_File.EnableMemoryBuffer(m_pReadHintSample, m_readHintSampleSize);
m_pReadHint = new MP4RtpHint(*this);
m_pReadHint->Read(m_File);
m_File.DisableMemoryBuffer();
if (pNumPackets) {
*pNumPackets = GetHintNumberOfPackets();
}
}
uint16_t MP4RtpHintTrack::GetHintNumberOfPackets()
{
if (m_pReadHint == NULL) {
throw new Exception("no hint has been read",
__FILE__, __LINE__, __FUNCTION__);
}
return m_pReadHint->GetNumberOfPackets();
}
bool MP4RtpHintTrack::GetPacketBFrame(uint16_t packetIndex)
{
if (m_pReadHint == NULL) {
throw new Exception("no hint has been read",
__FILE__, __LINE__, __FUNCTION__);
}
MP4RtpPacket* pPacket =
m_pReadHint->GetPacket(packetIndex);
return pPacket->IsBFrame();
}
uint16_t MP4RtpHintTrack::GetPacketTransmitOffset(uint16_t packetIndex)
{
if (m_pReadHint == NULL) {
throw new Exception("no hint has been read",
__FILE__, __LINE__, __FUNCTION__);
}
MP4RtpPacket* pPacket =
m_pReadHint->GetPacket(packetIndex);
return pPacket->GetTransmitOffset();
}
void MP4RtpHintTrack::ReadPacket(
uint16_t packetIndex,
uint8_t** ppBytes,
uint32_t* pNumBytes,
uint32_t ssrc,
bool addHeader,
bool addPayload)
{
if (m_pReadHint == NULL) {
throw new Exception("no hint has been read",
__FILE__, __LINE__, __FUNCTION__);
}
if (!addHeader && !addPayload) {
throw new Exception("no data requested",
__FILE__, __LINE__, __FUNCTION__);
}
MP4RtpPacket* pPacket =
m_pReadHint->GetPacket(packetIndex);
*pNumBytes = 0;
if (addHeader) {
*pNumBytes += 12;
}
if (addPayload) {
*pNumBytes += pPacket->GetDataSize();
}
// if needed, allocate the packet memory
bool buffer_malloc = false;
if (*ppBytes == NULL) {
*ppBytes = (uint8_t*)MP4Malloc(*pNumBytes);
buffer_malloc = true;
}
try {
uint8_t* pDest = *ppBytes;
if (addHeader) {
*pDest++ =
0x80 | (pPacket->GetPBit() << 5) | (pPacket->GetXBit() << 4);
*pDest++ =
(pPacket->GetMBit() << 7) | pPacket->GetPayload();
*((uint16_t*)pDest) =
MP4V2_HTONS(m_rtpSequenceStart + pPacket->GetSequenceNumber());
pDest += 2;
*((uint32_t*)pDest) =
MP4V2_HTONL(m_rtpTimestampStart + (uint32_t)m_readHintTimestamp);
pDest += 4;
*((uint32_t*)pDest) =
MP4V2_HTONL(ssrc);
pDest += 4;
}
if (addPayload) {
pPacket->GetData(pDest);
}
}
catch (Exception* x) {
if (buffer_malloc) {
MP4Free(*ppBytes);
*ppBytes = NULL;
}
throw x;
}
log.hexDump(0, MP4_LOG_VERBOSE1, *ppBytes, *pNumBytes,
"\"%s\": %u ", GetFile().GetFilename().c_str(),
packetIndex);
}
MP4Timestamp MP4RtpHintTrack::GetRtpTimestampStart()
{
if (m_pRefTrack == NULL) {
InitRefTrack();
InitRtpStart();
}
return m_rtpTimestampStart;
}
void MP4RtpHintTrack::SetRtpTimestampStart(MP4Timestamp start)
{
if (!m_pTsroProperty) {
MP4Atom* pTsroAtom =
m_File.AddDescendantAtoms(&m_trakAtom, "udta.hnti.rtp .tsro");
ASSERT(pTsroAtom);
(void)pTsroAtom->FindProperty("offset",
(MP4Property**)&m_pTsroProperty);
ASSERT(m_pTsroProperty);
}
m_pTsroProperty->SetValue(start);
m_rtpTimestampStart = start;
}
void MP4RtpHintTrack::InitPayload()
{
if (m_pRtpMapProperty == NULL) {
(void)m_trakAtom.FindProperty(
"trak.udta.hinf.payt.rtpMap",
(MP4Property**)&m_pRtpMapProperty);
}
if (m_pPayloadNumberProperty == NULL) {
(void)m_trakAtom.FindProperty(
"trak.udta.hinf.payt.payloadNumber",
(MP4Property**)&m_pPayloadNumberProperty);
}
if (m_pMaxPacketSizeProperty == NULL) {
(void)m_trakAtom.FindProperty(
"trak.mdia.minf.stbl.stsd.rtp .maxPacketSize",
(MP4Property**)&m_pMaxPacketSizeProperty);
}
}
void MP4RtpHintTrack::GetPayload(
char** ppPayloadName,
uint8_t* pPayloadNumber,
uint16_t* pMaxPayloadSize,
char **ppEncodingParams)
{
const char* pRtpMap;
const char* pSlash;
uint32_t length;
InitPayload();
if (ppPayloadName || ppEncodingParams) {
if (ppPayloadName)
*ppPayloadName = NULL;
if (ppEncodingParams)
*ppEncodingParams = NULL;
if (m_pRtpMapProperty) {
pRtpMap = m_pRtpMapProperty->GetValue();
pSlash = strchr(pRtpMap, '/');
if (pSlash) {
length = pSlash - pRtpMap;
} else {
length = (uint32_t)strlen(pRtpMap);
}
if (ppPayloadName) {
*ppPayloadName = (char*)MP4Calloc(length + 1);
strncpy(*ppPayloadName, pRtpMap, length);
}
if (pSlash && ppEncodingParams) {
pSlash++;
pSlash = strchr(pSlash, '/');
if (pSlash != NULL) {
pSlash++;
if ( *pSlash != '\0' ) {
length = (uint32_t)strlen(pRtpMap) - (pSlash - pRtpMap);
*ppEncodingParams = (char *)MP4Calloc(length + 1);
strncpy(*ppEncodingParams, pSlash, length);
}
}
}
}
}
if (pPayloadNumber) {
if (m_pPayloadNumberProperty) {
*pPayloadNumber = m_pPayloadNumberProperty->GetValue();
} else {
*pPayloadNumber = 0;
}
}
if (pMaxPayloadSize) {
if (m_pMaxPacketSizeProperty) {
*pMaxPayloadSize = m_pMaxPacketSizeProperty->GetValue();
} else {
*pMaxPayloadSize = 0;
}
}
}
void MP4RtpHintTrack::SetPayload(
const char* payloadName,
uint8_t payloadNumber,
uint16_t maxPayloadSize,
const char *encoding_parms,
bool include_rtp_map,
bool include_mpeg4_esid)
{
InitRefTrack();
InitPayload();
ASSERT(m_pRtpMapProperty);
ASSERT(m_pPayloadNumberProperty);
ASSERT(m_pMaxPacketSizeProperty);
size_t len = strlen(payloadName) + 16;
if (encoding_parms != NULL) {
size_t temp = strlen(encoding_parms);
if (temp == 0) {
encoding_parms = NULL;
} else {
len += temp;
}
}
char* rtpMapBuf = (char*)MP4Malloc(len);
snprintf(rtpMapBuf, len, "%s/%u%c%s",
payloadName,
GetTimeScale(),
encoding_parms != NULL ? '/' : '\0',
encoding_parms == NULL ? "" : encoding_parms);
m_pRtpMapProperty->SetValue(rtpMapBuf);
m_pPayloadNumberProperty->SetValue(payloadNumber);
if (maxPayloadSize == 0) {
maxPayloadSize = 1460;
}
m_pMaxPacketSizeProperty->SetValue(maxPayloadSize);
// set sdp media type
const char* sdpMediaType;
if (!strcmp(m_pRefTrack->GetType(), MP4_AUDIO_TRACK_TYPE)) {
sdpMediaType = "audio";
} else if (!strcmp(m_pRefTrack->GetType(), MP4_VIDEO_TRACK_TYPE)) {
sdpMediaType = "video";
} else if (!strcmp(m_pRefTrack->GetType(), MP4_CNTL_TRACK_TYPE)) {
sdpMediaType = "control";
} else {
sdpMediaType = "application";
}
uint32_t maxlen =
(uint32_t)strlen(sdpMediaType) + (uint32_t)strlen(rtpMapBuf) + 256;
char* sdpBuf = (char*)MP4Malloc(maxlen);
uint32_t buflen;
buflen = snprintf(sdpBuf, maxlen,
"m=%s 0 RTP/AVP %u\015\012"
"a=control:trackID=%u\015\012",
sdpMediaType, payloadNumber,
m_trackId);
if (include_rtp_map) {
buflen += snprintf(sdpBuf + buflen, maxlen - buflen,
"a=rtpmap:%u %s\015\012",
payloadNumber, rtpMapBuf);
}
if (include_mpeg4_esid) {
snprintf(sdpBuf + buflen, maxlen - buflen,
"a=mpeg4-esid:%u\015\012",
m_pRefTrack->GetId());
}
MP4StringProperty* pSdpProperty = NULL;
(void)m_trakAtom.FindProperty("trak.udta.hnti.sdp .sdpText",
(MP4Property**)&pSdpProperty);
ASSERT(pSdpProperty);
pSdpProperty->SetValue(sdpBuf);
// cleanup
MP4Free(rtpMapBuf);
MP4Free(sdpBuf);
}
void MP4RtpHintTrack::AddHint(bool isBFrame, uint32_t timestampOffset)
{
// on first hint, need to lookup the reference track
if (m_writeHintId == MP4_INVALID_SAMPLE_ID) {
InitRefTrack();
InitStats();
}
if (m_pWriteHint) {
throw new Exception("unwritten hint is still pending", __FILE__, __LINE__, __FUNCTION__);
}
m_pWriteHint = new MP4RtpHint(*this);
m_pWriteHint->SetBFrame(isBFrame);
m_pWriteHint->SetTimestampOffset(timestampOffset);
m_bytesThisHint = 0;
m_writeHintId++;
}
void MP4RtpHintTrack::AddPacket(bool setMbit, int32_t transmitOffset)
{
if (m_pWriteHint == NULL) {
throw new Exception("no hint pending", __FILE__, __LINE__, __FUNCTION__);
}
MP4RtpPacket* pPacket = m_pWriteHint->AddPacket();
ASSERT(m_pPayloadNumberProperty);
pPacket->Set(
m_pPayloadNumberProperty->GetValue(),
m_writePacketId++,
setMbit);
pPacket->SetTransmitOffset(transmitOffset);
m_bytesThisHint += 12;
if (m_bytesThisPacket > m_pPmax->GetValue()) {
m_pPmax->SetValue(m_bytesThisPacket);
}
m_bytesThisPacket = 12;
m_pNump->IncrementValue();
m_pTrpy->IncrementValue(12); // RTP packet header size
}
void MP4RtpHintTrack::AddImmediateData(
const uint8_t* pBytes,
uint32_t numBytes)
{
if (m_pWriteHint == NULL) {
throw new Exception("no hint pending", __FILE__, __LINE__, __FUNCTION__ );
}
MP4RtpPacket* pPacket = m_pWriteHint->GetCurrentPacket();
if (pPacket == NULL) {
throw new Exception("no packet pending", __FILE__, __LINE__, __FUNCTION__);
}
if (pBytes == NULL || numBytes == 0) {
throw new Exception("no data",
__FILE__, __LINE__, __FUNCTION__ );
}
if (numBytes > 14) {
throw new Exception("data size is larger than 14 bytes",
__FILE__, __LINE__, __FUNCTION__ );
}
MP4RtpImmediateData* pData = new MP4RtpImmediateData(*pPacket);
pData->Set(pBytes, numBytes);
pPacket->AddData(pData);
m_bytesThisHint += numBytes;
m_bytesThisPacket += numBytes;
m_pDimm->IncrementValue(numBytes);
m_pTpyl->IncrementValue(numBytes);
m_pTrpy->IncrementValue(numBytes);
}
void MP4RtpHintTrack::AddSampleData(
MP4SampleId sampleId,
uint32_t dataOffset,
uint32_t dataLength)
{
if (m_pWriteHint == NULL) {
throw new Exception("no hint pending", __FILE__, __LINE__, __FUNCTION__ );
}
MP4RtpPacket* pPacket = m_pWriteHint->GetCurrentPacket();
if (pPacket == NULL) {
throw new Exception("no packet pending", __FILE__, __LINE__, __FUNCTION__ );
}
MP4RtpSampleData* pData = new MP4RtpSampleData(*pPacket);
pData->SetReferenceSample(sampleId, dataOffset, dataLength);
pPacket->AddData(pData);
m_bytesThisHint += dataLength;
m_bytesThisPacket += dataLength;
m_pDmed->IncrementValue(dataLength);
m_pTpyl->IncrementValue(dataLength);
m_pTrpy->IncrementValue(dataLength);
}
void MP4RtpHintTrack::AddESConfigurationPacket()
{
if (m_pWriteHint == NULL) {
throw new Exception("no hint pending", __FILE__, __LINE__, __FUNCTION__ );
}
uint8_t* pConfig = NULL;
uint32_t configSize = 0;
m_File.GetTrackESConfiguration(m_pRefTrack->GetId(),
&pConfig, &configSize);
if (pConfig == NULL) {
return;
}
ASSERT(m_pMaxPacketSizeProperty);
if (configSize > m_pMaxPacketSizeProperty->GetValue()) {
throw new Exception("ES configuration is too large for RTP payload", __FILE__, __LINE__, __FUNCTION__ );
}
AddPacket(false);
MP4RtpPacket* pPacket = m_pWriteHint->GetCurrentPacket();
ASSERT(pPacket);
// This is ugly!
// To get the ES configuration data somewhere known
// we create a sample data reference that points to
// this hint track (not the media track)
// and this sample of the hint track
// the offset into this sample is filled in during the write process
MP4RtpSampleData* pData = new MP4RtpSampleData(*pPacket);
pData->SetEmbeddedImmediate(m_writeSampleId, pConfig, configSize);
pPacket->AddData(pData);
m_bytesThisHint += configSize;
m_bytesThisPacket += configSize;
m_pTpyl->IncrementValue(configSize);
m_pTrpy->IncrementValue(configSize);
}
void MP4RtpHintTrack::WriteHint(MP4Duration duration, bool isSyncSample)
{
if (m_pWriteHint == NULL) {
throw new Exception("no hint pending", __FILE__, __LINE__, __FUNCTION__ );
}
uint8_t* pBytes;
uint64_t numBytes;
m_File.EnableMemoryBuffer();
m_pWriteHint->Write(m_File);
m_File.DisableMemoryBuffer(&pBytes, &numBytes);
WriteSample(pBytes, numBytes, duration, 0, isSyncSample);
MP4Free(pBytes);
// update statistics
if (m_bytesThisPacket > m_pPmax->GetValue()) {
m_pPmax->SetValue(m_bytesThisPacket);
}
if (duration > m_pDmax->GetValue()) {
m_pDmax->SetValue(duration);
}
MP4Timestamp startTime;
GetSampleTimes(m_writeHintId, &startTime, NULL);
if (startTime < m_thisSec + GetTimeScale()) {
m_bytesThisSec += m_bytesThisHint;
} else {
if (m_bytesThisSec > m_pMaxr->GetValue()) {
m_pMaxr->SetValue(m_bytesThisSec);
}
m_thisSec = startTime - (startTime % GetTimeScale());
m_bytesThisSec = m_bytesThisHint;
}
// cleanup
delete m_pWriteHint;
m_pWriteHint = NULL;
}
void MP4RtpHintTrack::FinishWrite(uint32_t option)
{
if (m_writeHintId != MP4_INVALID_SAMPLE_ID) {
m_pMaxPdu->SetValue(m_pPmax->GetValue());
if (m_pNump->GetValue()) {
m_pAvgPdu->SetValue(m_pTrpy->GetValue() / m_pNump->GetValue());
}
m_pMaxBitRate->SetValue(m_pMaxr->GetValue() * 8);
if (GetDuration()) {
m_pAvgBitRate->SetValue(
m_pTrpy->GetValue() * 8 * GetTimeScale() / GetDuration());
}
}
MP4Track::FinishWrite();
}
void MP4RtpHintTrack::InitStats()
{
MP4Atom* pHinfAtom = m_trakAtom.FindAtom("trak.udta.hinf");
ASSERT(pHinfAtom);
(void)pHinfAtom->FindProperty("hinf.trpy.bytes", (MP4Property**)&m_pTrpy);
(void)pHinfAtom->FindProperty("hinf.nump.packets", (MP4Property**)&m_pNump);
(void)pHinfAtom->FindProperty("hinf.tpyl.bytes", (MP4Property**)&m_pTpyl);
(void)pHinfAtom->FindProperty("hinf.maxr.bytes", (MP4Property**)&m_pMaxr);
(void)pHinfAtom->FindProperty("hinf.dmed.bytes", (MP4Property**)&m_pDmed);
(void)pHinfAtom->FindProperty("hinf.dimm.bytes", (MP4Property**)&m_pDimm);
(void)pHinfAtom->FindProperty("hinf.pmax.bytes", (MP4Property**)&m_pPmax);
(void)pHinfAtom->FindProperty("hinf.dmax.milliSecs", (MP4Property**)&m_pDmax);
MP4Atom* pHmhdAtom = m_trakAtom.FindAtom("trak.mdia.minf.hmhd");
ASSERT(pHmhdAtom);
(void)pHmhdAtom->FindProperty("hmhd.maxPduSize", (MP4Property**)&m_pMaxPdu);
(void)pHmhdAtom->FindProperty("hmhd.avgPduSize", (MP4Property**)&m_pAvgPdu);
(void)pHmhdAtom->FindProperty("hmhd.maxBitRate", (MP4Property**)&m_pMaxBitRate);
(void)pHmhdAtom->FindProperty("hmhd.avgBitRate", (MP4Property**)&m_pAvgBitRate);
MP4Integer32Property* pMaxrPeriod = NULL;
(void)pHinfAtom->FindProperty("hinf.maxr.granularity",
(MP4Property**)&pMaxrPeriod);
if (pMaxrPeriod) {
pMaxrPeriod->SetValue(1000); // 1 second
}
}
MP4RtpHint::MP4RtpHint(MP4RtpHintTrack& track)
: m_track(track)
{
AddProperty( /* 0 */
new MP4Integer16Property(this->GetTrack().GetTrakAtom(), "packetCount"));
AddProperty( /* 1 */
new MP4Integer16Property(this->GetTrack().GetTrakAtom(), "reserved"));
}
MP4RtpHint::~MP4RtpHint()
{
for (uint32_t i = 0; i < m_rtpPackets.Size(); i++) {
delete m_rtpPackets[i];
}
}
MP4RtpPacket* MP4RtpHint::AddPacket()
{
MP4RtpPacket* pPacket = new MP4RtpPacket(*this);
m_rtpPackets.Add(pPacket);
// packetCount property
((MP4Integer16Property*)m_pProperties[0])->IncrementValue();
pPacket->SetBFrame(m_isBFrame);
pPacket->SetTimestampOffset(m_timestampOffset);
return pPacket;
}
void MP4RtpHint::Read(MP4File& file)
{
// call base class Read for required properties
MP4Container::Read(file);
uint16_t numPackets =
((MP4Integer16Property*)m_pProperties[0])->GetValue();
for (uint16_t i = 0; i < numPackets; i++) {
MP4RtpPacket* pPacket = new MP4RtpPacket(*this);
m_rtpPackets.Add(pPacket);
pPacket->Read(file);
}
if (log.verbosity >= MP4_LOG_VERBOSE1) {
log.verbose1f("\"%s\": ReadHint:", GetTrack().GetFile().GetFilename().c_str());
Dump(10, false);
}
}
void MP4RtpHint::Write(MP4File& file)
{
uint64_t hintStartPos = file.GetPosition();
MP4Container::Write(file);
uint64_t packetStartPos = file.GetPosition();
uint32_t i;
// first write out packet (and data) entries
for (i = 0; i < m_rtpPackets.Size(); i++) {
m_rtpPackets[i]->Write(file);
}
// now let packets write their extra data into the hint sample
for (i = 0; i < m_rtpPackets.Size(); i++) {
m_rtpPackets[i]->WriteEmbeddedData(file, hintStartPos);
}
uint64_t endPos = file.GetPosition();
file.SetPosition(packetStartPos);
// finally rewrite the packet and data entries
// which now contain the correct offsets for the embedded data
for (i = 0; i < m_rtpPackets.Size(); i++) {
m_rtpPackets[i]->Write(file);
}
file.SetPosition(endPos);
if (log.verbosity >= MP4_LOG_VERBOSE1) {
log.verbose1f("\"%s\": WriteRtpHint:", GetTrack().GetFile().GetFilename().c_str());
Dump(14, false);
}
}
void MP4RtpHint::Dump(uint8_t indent, bool dumpImplicits)
{
MP4Container::Dump(indent, dumpImplicits);
for (uint32_t i = 0; i < m_rtpPackets.Size(); i++) {
log.dump(indent, MP4_LOG_VERBOSE1,"\"%s\": RtpPacket: %u",
GetTrack().GetFile().GetFilename().c_str(), i);
m_rtpPackets[i]->Dump(indent + 1, dumpImplicits);
}
}
MP4RtpPacket::MP4RtpPacket(MP4RtpHint& hint)
: m_hint(hint)
{
AddProperty( /* 0 */
new MP4Integer32Property(this->GetHint().GetTrack().GetTrakAtom(), "relativeXmitTime"));
AddProperty( /* 1 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "reserved1", 2));
AddProperty( /* 2 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "Pbit", 1));
AddProperty( /* 3 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "Xbit", 1));
AddProperty( /* 4 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "reserved2", 4));
AddProperty( /* 5 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "Mbit", 1));
AddProperty( /* 6 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "payloadType", 7));
AddProperty( /* 7 */
new MP4Integer16Property(this->GetHint().GetTrack().GetTrakAtom(), "sequenceNumber"));
AddProperty( /* 8 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "reserved3", 13));
AddProperty( /* 9 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "extraFlag", 1));
AddProperty( /* 10 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "bFrameFlag", 1));
AddProperty( /* 11 */
new MP4BitfieldProperty(this->GetHint().GetTrack().GetTrakAtom(), "repeatFlag", 1));
AddProperty( /* 12 */
new MP4Integer16Property(this->GetHint().GetTrack().GetTrakAtom(), "entryCount"));
}
MP4RtpPacket::~MP4RtpPacket()
{
for (uint32_t i = 0; i < m_rtpData.Size(); i++) {
delete m_rtpData[i];
}
}
void MP4RtpPacket::AddExtraProperties()
{
AddProperty( /* 13 */
new MP4Integer32Property(this->GetHint().GetTrack().GetTrakAtom(), "extraInformationLength"));
// This is a bit of a hack, since the tlv entries are really defined
// as atoms but there is only one type defined now, rtpo, and getting
// our atom code hooked up here would be a major pain with little gain
AddProperty( /* 14 */
new MP4Integer32Property(this->GetHint().GetTrack().GetTrakAtom(), "tlvLength"));
AddProperty( /* 15 */
new MP4StringProperty(this->GetHint().GetTrack().GetTrakAtom(), "tlvType"));
AddProperty( /* 16 */
new MP4Integer32Property(this->GetHint().GetTrack().GetTrakAtom(), "timestampOffset"));
((MP4Integer32Property*)m_pProperties[13])->SetValue(16);
((MP4Integer32Property*)m_pProperties[14])->SetValue(12);
((MP4StringProperty*)m_pProperties[15])->SetFixedLength(4);
((MP4StringProperty*)m_pProperties[15])->SetValue("rtpo");
}
void MP4RtpPacket::Read(MP4File& file)
{
// call base class Read for required properties
MP4Container::Read(file);
// read extra info if present
// we only support the rtpo field!
if (((MP4BitfieldProperty*)m_pProperties[9])->GetValue() == 1) {
ReadExtra(file);
}
uint16_t numDataEntries =
((MP4Integer16Property*)m_pProperties[12])->GetValue();
// read data entries
for (uint16_t i = 0; i < numDataEntries; i++) {
uint8_t dataType;
file.PeekBytes(&dataType, 1);
MP4RtpData* pData;
switch (dataType) {
case 0:
pData = new MP4RtpNullData(*this);
break;
case 1:
pData = new MP4RtpImmediateData(*this);
break;
case 2:
pData = new MP4RtpSampleData(*this);
break;
case 3:
pData = new MP4RtpSampleDescriptionData(*this);
break;
default:
throw new Exception("unknown packet data entry type", __FILE__, __LINE__, __FUNCTION__ );
}
m_rtpData.Add(pData);
// read data entry's properties
pData->Read(file);
}
}
void MP4RtpPacket::ReadExtra(MP4File& file)
{
AddExtraProperties();
int32_t extraLength = (int32_t)file.ReadUInt32();
if (extraLength < 4) {
throw new Exception("bad packet extra info length", __FILE__, __LINE__, __FUNCTION__ );
}
extraLength -= 4;
while (extraLength > 0) {
uint32_t entryLength = file.ReadUInt32();
uint32_t entryTag = file.ReadUInt32();
if (entryLength < 8) {
throw new Exception("bad packet extra info entry length", __FILE__, __LINE__, __FUNCTION__ );
}
if (entryTag == STRTOINT32("rtpo") && entryLength == 12) {
// read the rtp timestamp offset
m_pProperties[16]->Read(file);
} else {
// ignore it, LATER carry it along
file.SetPosition(file.GetPosition() + entryLength - 8);
}
extraLength -= entryLength;
}
if (extraLength < 0) {
throw new Exception("invalid packet extra info length", __FILE__, __LINE__, __FUNCTION__ );
}
}
void MP4RtpPacket::Set(uint8_t payloadNumber,
uint32_t packetId, bool setMbit)
{
((MP4BitfieldProperty*)m_pProperties[5])->SetValue(setMbit);
((MP4BitfieldProperty*)m_pProperties[6])->SetValue(payloadNumber);
((MP4Integer16Property*)m_pProperties[7])->SetValue(packetId);
}
int32_t MP4RtpPacket::GetTransmitOffset()
{
return ((MP4Integer32Property*)m_pProperties[0])->GetValue();
}
void MP4RtpPacket::SetTransmitOffset(int32_t transmitOffset)
{
((MP4Integer32Property*)m_pProperties[0])->SetValue(transmitOffset);
}
bool MP4RtpPacket::GetPBit()
{
return ((MP4BitfieldProperty*)m_pProperties[2])->GetValue();
}
bool MP4RtpPacket::GetXBit()
{
return ((MP4BitfieldProperty*)m_pProperties[3])->GetValue();
}
bool MP4RtpPacket::GetMBit()
{
return ((MP4BitfieldProperty*)m_pProperties[5])->GetValue();
}
uint8_t MP4RtpPacket::GetPayload()
{
return ((MP4BitfieldProperty*)m_pProperties[6])->GetValue();
}
uint16_t MP4RtpPacket::GetSequenceNumber()
{
return ((MP4Integer16Property*)m_pProperties[7])->GetValue();
}
bool MP4RtpPacket::IsBFrame()
{
return ((MP4BitfieldProperty*)m_pProperties[10])->GetValue();
}
void MP4RtpPacket::SetBFrame(bool isBFrame)
{
((MP4BitfieldProperty*)m_pProperties[10])->SetValue(isBFrame);
}
void MP4RtpPacket::SetTimestampOffset(uint32_t timestampOffset)
{
if (timestampOffset == 0) {
return;
}