MP4EncvAtom::MP4EncvAtom()
: MP4Atom("encv")
{
AddReserved("reserved1", 6); /* 0 */
AddProperty( /* 1 */
new MP4Integer16Property("dataReferenceIndex"));
AddReserved("reserved2", 16); /* 2 */
AddProperty( /* 3 */
new MP4Integer16Property("width"));
AddProperty( /* 4 */
new MP4Integer16Property("height"));
AddReserved("reserved3", 14); /* 5 */
MP4StringProperty* pProp =
new MP4StringProperty("compressorName");
pProp->SetFixedLength(32);
pProp->SetValue("");
AddProperty(pProp); /* 6 */
AddReserved("reserved4", 4); /* 7 */
ExpectChildAtom("esds", Required, OnlyOne);
ExpectChildAtom("sinf", Required, OnlyOne);
ExpectChildAtom("avcC", Optional, OnlyOne);
}
MP4Mp4vAtom::MP4Mp4vAtom(MP4File &file)
: MP4Atom(file, "mp4v")
{
AddReserved(*this, "reserved1", 6); /* 0 */
AddProperty( /* 1 */
new MP4Integer16Property(*this, "dataReferenceIndex"));
AddReserved(*this, "reserved2", 16); /* 2 */
AddProperty( /* 3 */
new MP4Integer16Property(*this, "width"));
AddProperty( /* 4 */
new MP4Integer16Property(*this, "height"));
AddReserved(*this, "reserved3", 14); /* 5 */
MP4StringProperty* pProp =
new MP4StringProperty(*this, "compressorName");
pProp->SetFixedLength(32);
pProp->SetCountedFormat(true);
pProp->SetValue("");
AddProperty(pProp); /* 6 */
AddReserved(*this, "reserved4", 4); /* 7 */
ExpectChildAtom("colr", Optional, OnlyOne);
ExpectChildAtom("esds", Required, OnlyOne);
ExpectChildAtom("pasp", Optional, OnlyOne);
}
MP4AvspAtom::MP4AvspAtom()
: MP4Atom("avsp")
{
AddReserved("reserved1", 6); /* 0 */
AddProperty( /* 1 */
new MP4Integer16Property("dataReferenceIndex"));
AddReserved("reserved2", 16); /* 2 */
AddProperty( /* 3 */
new MP4Integer16Property("width"));
AddProperty( /* 4 */
new MP4Integer16Property("height"));
AddReserved("reserved3", 14); /* 5 */
MP4StringProperty* pProp =
new MP4StringProperty("compressorName");
pProp->SetFixedLength(32);
pProp->SetValue("AVS-M Parameters");
AddProperty(pProp); /* 6 */
AddReserved("reserved4", 4); /* 7 */
ExpectChildAtom("avsc", Required, OnlyOne);
ExpectChildAtom("btrt", Optional, OnlyOne);
// for now ExpectChildAtom("m4ds", Optional, OnlyOne);
}
MP4VideoAtom::MP4VideoAtom (const char *type)
: MP4Atom(type)
{
AddReserved("reserved1", 6); /* 0 */
AddProperty( /* 1 */
new MP4Integer16Property("dataReferenceIndex"));
AddReserved("reserved2", 16); /* 2 */
AddProperty( /* 3 */
new MP4Integer16Property("width"));
AddProperty( /* 4 */
new MP4Integer16Property("height"));
AddReserved("reserved3", 14); /* 5 */
MP4StringProperty* pProp =
new MP4StringProperty("compressorName");
pProp->SetFixedLength(32);
pProp->SetCountedFormat(true);
pProp->SetValue("");
AddProperty(pProp); /* 6 */
AddProperty(/* 7 */
new MP4Integer16Property("depth"));
AddProperty(/* 8 */
new MP4Integer16Property("colorTableId"));
ExpectChildAtom("smi ", Optional, OnlyOne);
}
void MP4RtpAtom::WriteHntiType()
{
// since length of string is implicit in size of atom
// we need to handle this specially, and not write the terminating \0
MP4StringProperty* pSdp = (MP4StringProperty*)m_pProperties[1];
pSdp->SetFixedLength(strlen(pSdp->GetValue()));
MP4Atom::Write();
pSdp->SetFixedLength(0);
}
void MP4RtpAtom::AddPropertiesHntiType()
{
MP4StringProperty* pProp =
new MP4StringProperty("descriptionFormat");
pProp->SetFixedLength(4);
AddProperty(pProp); /* 0 */
AddProperty( /* 1 */
new MP4StringProperty("sdpText"));
}
MP4HdlrAtom::MP4HdlrAtom()
: MP4Atom("hdlr")
{
AddVersionAndFlags(); /* 0, 1 */
AddReserved("reserved1", 4); /* 2 */
MP4StringProperty* pProp = new MP4StringProperty("handlerType");
pProp->SetFixedLength(4);
AddProperty(pProp); /* 3 */
AddReserved("reserved2", 12); /* 4 */
AddProperty( /* 5 */
new MP4StringProperty("name"));
}
void MP4SdpAtom::Write()
{
// since length of string is implicit in size of atom
// we need to handle this specially, and not write the terminating \0
MP4StringProperty* pSdp = (MP4StringProperty*)m_pProperties[0];
const char* sdpText = pSdp->GetValue();
if (sdpText) {
pSdp->SetFixedLength(strlen(sdpText));
}
MP4Atom::Write();
pSdp->SetFixedLength(0);
}
MP4ColrAtom::MP4ColrAtom()
: MP4Atom("colr")
{
MP4StringProperty* cpt = new MP4StringProperty("colorParameterType");
cpt->SetFixedLength(4);
AddProperty(cpt); /* 0 */
AddProperty( /* 1 */ new MP4Integer16Property("primariesIndex"));
AddProperty( /* 2 */ new MP4Integer16Property("transferFunctionIndex"));
AddProperty( /* 3 */ new MP4Integer16Property("matrixIndex"));
}
void MP4FtypAtom::Generate()
{
MP4Atom::Generate();
((MP4StringProperty*)m_pProperties[0])->SetValue("mp42");
MP4StringProperty* pBrandProperty = (MP4StringProperty*)
((MP4TableProperty*)m_pProperties[3])->GetProperty(0);
ASSERT(pBrandProperty);
pBrandProperty->AddValue("mp42");
pBrandProperty->AddValue("isom");
((MP4Integer32Property*)m_pProperties[2])->IncrementValue();
((MP4Integer32Property*)m_pProperties[2])->IncrementValue();
}
MP4FtypAtom::MP4FtypAtom()
: MP4Atom("ftyp")
{
MP4StringProperty* pProp = new MP4StringProperty("majorBrand");
pProp->SetFixedLength(4);
AddProperty(pProp); /* 0 */
AddProperty( /* 1 */
new MP4Integer32Property("minorVersion"));
MP4Integer32Property* pCount =
new MP4Integer32Property("compatibleBrandsCount");
pCount->SetImplicit();
AddProperty(pCount); /* 2 */
MP4TableProperty* pTable =
new MP4TableProperty("compatibleBrands", pCount);
AddProperty(pTable); /* 3 */
pProp = new MP4StringProperty("brand");
pProp->SetFixedLength(4);
pTable->AddProperty(pProp);
}
// There is a spec incompatiblity between QT and MP4
// QT says name field is a counted string
// MP4 says name field is a null terminated string
// Here we attempt to make all things work
void MP4HdlrAtom::Read()
{
// read all the properties but the "name" field
ReadProperties(0, 5);
// take a peek at the next byte
u_int8_t strLength;
m_pFile->PeekBytes(&strLength, 1);
// if the value matches the remaining atom length
if (m_pFile->GetPosition() + strLength + 1 == GetEnd()) {
// read a counted string
MP4StringProperty* pNameProp =
(MP4StringProperty*)m_pProperties[5];
pNameProp->SetCountedFormat(true);
ReadProperties(5);
pNameProp->SetCountedFormat(false);
} else {
// read a null terminated string
ReadProperties(5);
}
Skip(); // to end of atom
}
void MP4File::MakeFtypAtom(char* majorBrand, u_int32_t minorVersion, char** supportedBrands, u_int32_t supportedBrandsCount)
{
bool rewriteNeeded = false;
u_int32_t currentSupportedBrandsCount;
u_int32_t i;
MP4Atom* ftypAtom = m_pRootAtom->FindAtom("ftyp");
if (ftypAtom == NULL) {
ftypAtom = InsertChildAtom(m_pRootAtom, "ftyp", 0);
}
if (majorBrand == NULL)
return;
MP4StringProperty* pMajorBrandProperty;
if (!ftypAtom->FindProperty(
"ftyp.majorBrand",
(MP4Property**)&pMajorBrandProperty))
return;
pMajorBrandProperty->SetValue(majorBrand);
MP4Integer32Property* pMinorVersionProperty;
if (!ftypAtom->FindProperty(
"ftype.minorVersion",
(MP4Property**)&pMinorVersionProperty))
return;
pMinorVersionProperty->SetValue(minorVersion);
MP4Integer32Property* pCompatibleBrandsCountProperty;
if (!ftypAtom->FindProperty(
"ftyp.compatibleBrandsCount",
(MP4Property**)&pCompatibleBrandsCountProperty)) return;
currentSupportedBrandsCount = pCompatibleBrandsCountProperty->GetValue();
MP4TableProperty* pCompatibleBrandsProperty;
if (!ftypAtom->FindProperty(
"ftyp.compatibleBrands",
(MP4Property**)&pCompatibleBrandsProperty)) return;
MP4StringProperty* pBrandProperty = (MP4StringProperty*)
pCompatibleBrandsProperty->GetProperty(0);
ASSERT(pBrandProperty);
for (i = 0 ; i < ((currentSupportedBrandsCount > supportedBrandsCount) ? supportedBrandsCount : currentSupportedBrandsCount) ; i++) {
pBrandProperty->SetValue(supportedBrands[i], i);
}
if (i < supportedBrandsCount) {
for ( ; i < supportedBrandsCount ; i++) {
pBrandProperty->AddValue(supportedBrands[i]);
}
}
if (currentSupportedBrandsCount != supportedBrandsCount) {
rewriteNeeded = true;
pBrandProperty->SetCount(supportedBrandsCount);
pCompatibleBrandsCountProperty->SetReadOnly(false);
pCompatibleBrandsCountProperty->SetValue(supportedBrandsCount);
pCompatibleBrandsCountProperty->SetReadOnly(true);
}
}
FILE* MP4Track::GetSampleFile(MP4SampleId sampleId)
{
u_int32_t stscIndex =
GetSampleStscIndex(sampleId);
u_int32_t stsdIndex =
m_pStscSampleDescrIndexProperty->GetValue(stscIndex);
// check if the answer will be the same as last time
if (m_lastStsdIndex && stsdIndex == m_lastStsdIndex) {
return m_lastSampleFile;
}
MP4Atom* pStsdAtom =
m_pTrakAtom->FindAtom("trak.mdia.minf.stbl.stsd");
ASSERT(pStsdAtom);
MP4Atom* pStsdEntryAtom =
pStsdAtom->GetChildAtom(stsdIndex - 1);
ASSERT(pStsdEntryAtom);
MP4Integer16Property* pDrefIndexProperty = NULL;
pStsdEntryAtom->FindProperty(
"*.dataReferenceIndex",
(MP4Property**)&pDrefIndexProperty);
if (pDrefIndexProperty == NULL) {
throw new MP4Error("invalid stsd entry", "GetSampleFile");
}
u_int32_t drefIndex =
pDrefIndexProperty->GetValue();
MP4Atom* pDrefAtom =
m_pTrakAtom->FindAtom("trak.mdia.minf.dinf.dref");
ASSERT(pDrefAtom);
MP4Atom* pUrlAtom =
pDrefAtom->GetChildAtom(drefIndex - 1);
ASSERT(pUrlAtom);
FILE* pFile;
if (pUrlAtom->GetFlags() & 1) {
pFile = NULL; // self-contained
} else {
#ifndef USE_FILE_CALLBACKS
MP4StringProperty* pLocationProperty = NULL;
pUrlAtom->FindProperty(
"*.location",
(MP4Property**)&pLocationProperty);
ASSERT(pLocationProperty);
const char* url = pLocationProperty->GetValue();
VERBOSE_READ_SAMPLE(m_pFile->GetVerbosity(),
printf("dref url = %s\n", url));
pFile = (FILE*)-1;
// attempt to open url if it's a file url
// currently this is the only thing we understand
if (!strncmp(url, "file:", 5)) {
const char* fileName = url + 5;
if (!strncmp(fileName, "//", 2)) {
fileName = strchr(fileName + 2, '/');
}
if (fileName) {
pFile = fopen(fileName, "rb");
if (!pFile) {
pFile = (FILE*)-1;
}
}
}
#else
throw new MP4Error(errno, "Function not supported when using callbacks", "GetSampleFile");
#endif
}
if (m_lastSampleFile) {
#ifndef USE_FILE_CALLBACKS
fclose(m_lastSampleFile);
#else
throw new MP4Error(errno, "Function not supported when using callbacks", "GetSampleFile");
#endif
}
// cache the answer
m_lastStsdIndex = stsdIndex;
m_lastSampleFile = pFile;
return pFile;
}
MP4Descriptor* MP4File::CreateESD(
MP4DescriptorProperty* pEsProperty,
u_int32_t esid,
u_int8_t objectType,
u_int8_t streamType,
u_int32_t bufferSize,
u_int32_t bitrate,
u_int8_t* pConfig,
u_int32_t configLength,
char* url)
{
MP4IntegerProperty* pInt;
MP4StringProperty* pString;
MP4BytesProperty* pBytes;
MP4BitfieldProperty* pBits;
MP4Descriptor* pEsd =
pEsProperty->AddDescriptor(MP4ESDescrTag);
pEsd->Generate();
pEsd->FindProperty("ESID",
(MP4Property**)&pInt);
pInt->SetValue(esid);
pEsd->FindProperty("decConfigDescr.objectTypeId",
(MP4Property**)&pInt);
pInt->SetValue(objectType);
pEsd->FindProperty("decConfigDescr.streamType",
(MP4Property**)&pInt);
pInt->SetValue(streamType);
pEsd->FindProperty("decConfigDescr.bufferSizeDB",
(MP4Property**)&pInt);
pInt->SetValue(bufferSize);
pEsd->FindProperty("decConfigDescr.maxBitrate",
(MP4Property**)&pInt);
pInt->SetValue(bitrate);
pEsd->FindProperty("decConfigDescr.avgBitrate",
(MP4Property**)&pInt);
pInt->SetValue(bitrate);
MP4DescriptorProperty* pConfigDescrProperty;
pEsd->FindProperty("decConfigDescr.decSpecificInfo",
(MP4Property**)&pConfigDescrProperty);
MP4Descriptor* pConfigDescr =
pConfigDescrProperty->AddDescriptor(MP4DecSpecificDescrTag);
pConfigDescr->Generate();
pConfigDescrProperty->FindProperty("decSpecificInfo[0].info",
(MP4Property**)&pBytes);
pBytes->SetValue(pConfig, configLength);
pEsd->FindProperty("slConfigDescr.predefined",
(MP4Property**)&pInt);
// changed 12/5/02 from plugfest to value 0
pInt->SetValue(0);
pEsd->FindProperty("slConfig.useAccessUnitEndFlag",
(MP4Property **)&pBits);
pBits->SetValue(1);
if (url) {
pEsd->FindProperty("URLFlag",
(MP4Property**)&pInt);
pInt->SetValue(1);
pEsd->FindProperty("URL",
(MP4Property**)&pString);
pString->SetValue(url);
}
return pEsd;
}
void MP4File::CreateIsmaIodFromFile(
MP4TrackId odTrackId,
MP4TrackId sceneTrackId,
MP4TrackId audioTrackId,
MP4TrackId videoTrackId,
u_int8_t** ppBytes,
u_int64_t* pNumBytes)
{
MP4Descriptor* pIod = new MP4IODescriptor();
pIod->SetTag(MP4IODescrTag);
pIod->Generate();
MP4Atom* pIodsAtom = FindAtom("moov.iods");
ASSERT(pIodsAtom);
MP4DescriptorProperty* pSrcIod =
(MP4DescriptorProperty*)pIodsAtom->GetProperty(2);
CloneIntegerProperty(pIod, pSrcIod, "objectDescriptorId");
CloneIntegerProperty(pIod, pSrcIod, "ODProfileLevelId");
CloneIntegerProperty(pIod, pSrcIod, "sceneProfileLevelId");
CloneIntegerProperty(pIod, pSrcIod, "audioProfileLevelId");
CloneIntegerProperty(pIod, pSrcIod, "visualProfileLevelId");
CloneIntegerProperty(pIod, pSrcIod, "graphicsProfileLevelId");
// mutate esIds from MP4ESIDIncDescrTag to MP4ESDescrTag
MP4DescriptorProperty* pEsProperty;
pIod->FindProperty("esIds", (MP4Property**)&pEsProperty);
pEsProperty->SetTags(MP4ESDescrTag);
MP4IntegerProperty* pSetProperty;
MP4IntegerProperty* pSceneESID;
MP4IntegerProperty* pOdESID;
// OD
MP4Descriptor* pOdEsd =
pEsProperty->AddDescriptor(MP4ESDescrTag);
pOdEsd->Generate();
pOdEsd->FindProperty("ESID",
(MP4Property**)&pOdESID);
// we set the OD ESID to a non-zero unique value
pOdESID->SetValue(m_odTrackId);
pOdEsd->FindProperty("URLFlag",
(MP4Property**)&pSetProperty);
pSetProperty->SetValue(1);
u_int8_t* pBytes;
u_int64_t numBytes;
CreateIsmaODUpdateCommandFromFileForStream(
audioTrackId,
videoTrackId,
&pBytes,
&numBytes);
VERBOSE_ISMA(GetVerbosity(),
printf("OD data =\n"); MP4HexDump(pBytes, numBytes));
char* odCmdBase64 = MP4ToBase64(pBytes, numBytes);
char* urlBuf = (char*)MP4Malloc(strlen(odCmdBase64) + 64);
sprintf(urlBuf,
"data:application/mpeg4-od-au;base64,%s",
odCmdBase64);
MP4StringProperty* pUrlProperty;
pOdEsd->FindProperty("URL",
(MP4Property**)&pUrlProperty);
pUrlProperty->SetValue(urlBuf);
VERBOSE_ISMA(GetVerbosity(),
printf("OD data URL = \042%s\042\n", urlBuf));
MP4Free(odCmdBase64);
odCmdBase64 = NULL;
MP4Free(pBytes);
pBytes = NULL;
MP4Free(urlBuf);
urlBuf = NULL;
MP4DescriptorProperty* pSrcDcd = NULL;
// HACK temporarily point to scene decoder config
FindProperty(MakeTrackName(odTrackId,
"mdia.minf.stbl.stsd.mp4s.esds.decConfigDescr"),
(MP4Property**)&pSrcDcd);
ASSERT(pSrcDcd);
MP4Property* pOrgOdEsdProperty =
pOdEsd->GetProperty(8);
pOdEsd->SetProperty(8, pSrcDcd);
// bufferSizeDB needs to be set appropriately
MP4BitfieldProperty* pBufferSizeProperty = NULL;
pOdEsd->FindProperty("decConfigDescr.bufferSizeDB",
(MP4Property**)&pBufferSizeProperty);
ASSERT(pBufferSizeProperty);
pBufferSizeProperty->SetValue(numBytes);
// SL config needs to change from 2 (file) to 1 (null)
pOdEsd->FindProperty("slConfigDescr.predefined",
(MP4Property**)&pSetProperty);
pSetProperty->SetValue(1);
// Scene
MP4Descriptor* pSceneEsd =
pEsProperty->AddDescriptor(MP4ESDescrTag);
pSceneEsd->Generate();
pSceneEsd->FindProperty("ESID",
(MP4Property**)&pSceneESID);
// we set the Scene ESID to a non-zero unique value
pSceneESID->SetValue(sceneTrackId);
pSceneEsd->FindProperty("URLFlag",
(MP4Property**)&pSetProperty);
pSetProperty->SetValue(1);
CreateIsmaSceneCommand(
MP4_IS_VALID_TRACK_ID(audioTrackId),
MP4_IS_VALID_TRACK_ID(videoTrackId),
&pBytes,
&numBytes);
VERBOSE_ISMA(GetVerbosity(),
printf("Scene data =\n"); MP4HexDump(pBytes, numBytes));
char *sceneCmdBase64 = MP4ToBase64(pBytes, numBytes);
urlBuf = (char*)MP4Malloc(strlen(sceneCmdBase64) + 64);
sprintf(urlBuf,
"data:application/mpeg4-bifs-au;base64,%s",
sceneCmdBase64);
pSceneEsd->FindProperty("URL",
(MP4Property**)&pUrlProperty);
pUrlProperty->SetValue(urlBuf);
VERBOSE_ISMA(GetVerbosity(),
printf("Scene data URL = \042%s\042\n", urlBuf));
MP4Free(sceneCmdBase64);
sceneCmdBase64 = NULL;
MP4Free(urlBuf);
urlBuf = NULL;
MP4Free(pBytes);
pBytes = NULL;
// HACK temporarily point to scene decoder config
FindProperty(MakeTrackName(sceneTrackId,
"mdia.minf.stbl.stsd.mp4s.esds.decConfigDescr"),
(MP4Property**)&pSrcDcd);
ASSERT(pSrcDcd);
MP4Property* pOrgSceneEsdProperty =
pSceneEsd->GetProperty(8);
pSceneEsd->SetProperty(8, pSrcDcd);
// bufferSizeDB needs to be set
pBufferSizeProperty = NULL;
pSceneEsd->FindProperty("decConfigDescr.bufferSizeDB",
(MP4Property**)&pBufferSizeProperty);
ASSERT(pBufferSizeProperty);
pBufferSizeProperty->SetValue(numBytes);
// SL config needs to change from 2 (file) to 1 (null)
pSceneEsd->FindProperty("slConfigDescr.predefined",
(MP4Property**)&pSetProperty);
pSetProperty->SetValue(1);
// finally get the whole thing written to a memory
pIod->WriteToMemory(this, ppBytes, pNumBytes);
// now carefully replace esd properties before destroying
pOdEsd->SetProperty(8, pOrgOdEsdProperty);
pSceneEsd->SetProperty(8, pOrgSceneEsdProperty);
pSceneESID->SetValue(0); // restore 0 value
pOdESID->SetValue(0);
delete pIod;
VERBOSE_ISMA(GetVerbosity(),
printf("IOD data =\n"); MP4HexDump(*ppBytes, *pNumBytes));
}
