ref: 4b4241830d669436bff595a1deaa5148f9562d79
dir: /common/mp4v2/mp4atom.cpp/
/* * 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] * Alix Marchandise-Franquet [email protected] */ #include "mp4common.h" #include "atoms.h" MP4AtomInfo::MP4AtomInfo(const char* name, bool mandatory, bool onlyOne) { m_name = name; m_mandatory = mandatory; m_onlyOne = onlyOne; m_count = 0; } MP4Atom::MP4Atom(const char* type) { SetType(type); m_unknownType = FALSE; m_pFile = NULL; m_start = 0; m_end = 0; m_size = 0; m_pParentAtom = NULL; m_depth = 0xFF; } MP4Atom::~MP4Atom() { u_int32_t i; for (i = 0; i < m_pProperties.Size(); i++) { delete m_pProperties[i]; } for (i = 0; i < m_pChildAtomInfos.Size(); i++) { delete m_pChildAtomInfos[i]; } for (i = 0; i < m_pChildAtoms.Size(); i++) { delete m_pChildAtoms[i]; } } MP4Atom* MP4Atom::CreateAtom(const char* type) { MP4Atom* pAtom = NULL; if (type == NULL) { pAtom = new MP4RootAtom(); } else { switch(type[0]) { case 'c': if (ATOMID(type) == ATOMID("ctts")) { pAtom = new MP4CttsAtom(); } else if (ATOMID(type) == ATOMID("co64")) { pAtom = new MP4Co64Atom(); } else if (ATOMID(type) == ATOMID("cprt")) { pAtom = new MP4CprtAtom(); } else if (ATOMID(type) == ATOMID("cpil")) { /* Apple iTunes */ pAtom = new MP4CpilAtom(); } break; case 'd': if (ATOMID(type) == ATOMID("dinf")) { pAtom = new MP4DinfAtom(); } else if (ATOMID(type) == ATOMID("dref")) { pAtom = new MP4DrefAtom(); } else if (ATOMID(type) == ATOMID("dpnd")) { pAtom = new MP4TrefTypeAtom(type); } else if (ATOMID(type) == ATOMID("dmed")) { pAtom = new MP4DmedAtom(); } else if (ATOMID(type) == ATOMID("dimm")) { pAtom = new MP4DimmAtom(); } else if (ATOMID(type) == ATOMID("drep")) { pAtom = new MP4DrepAtom(); } else if (ATOMID(type) == ATOMID("dmax")) { pAtom = new MP4DmaxAtom(); } else if (ATOMID(type) == ATOMID("data")) { /* Apple iTunes */ pAtom = new MP4DataAtom(); } else if (ATOMID(type) == ATOMID("disk")) { /* Apple iTunes */ pAtom = new MP4DiskAtom(); } break; case 'e': if (ATOMID(type) == ATOMID("esds")) { pAtom = new MP4EsdsAtom(); } else if (ATOMID(type) == ATOMID("edts")) { pAtom = new MP4EdtsAtom(); } else if (ATOMID(type) == ATOMID("elst")) { pAtom = new MP4ElstAtom(); } else if (ATOMID(type) == ATOMID("enca")) { pAtom = new MP4EncaAtom(); } else if (ATOMID(type) == ATOMID("encv")) { pAtom = new MP4EncvAtom(); } break; case 'f': if (ATOMID(type) == ATOMID("free")) { pAtom = new MP4FreeAtom(); } else if (ATOMID(type) == ATOMID("frma")) { pAtom = new MP4FrmaAtom(); } else if (ATOMID(type) == ATOMID("ftyp")) { pAtom = new MP4FtypAtom(); } break; case 'g': if (ATOMID(type) == ATOMID("gnre")) { /* Apple iTunes */ pAtom = new MP4GnreAtom(); } break; case 'h': if (ATOMID(type) == ATOMID("hdlr")) { pAtom = new MP4HdlrAtom(); } else if (ATOMID(type) == ATOMID("hmhd")) { pAtom = new MP4HmhdAtom(); } else if (ATOMID(type) == ATOMID("hint")) { pAtom = new MP4TrefTypeAtom(type); } else if (ATOMID(type) == ATOMID("hnti")) { pAtom = new MP4HntiAtom(); } else if (ATOMID(type) == ATOMID("hinf")) { pAtom = new MP4HinfAtom(); } break; case 'i': if (ATOMID(type) == ATOMID("iKMS")) { pAtom = new MP4IKMSAtom(); } else if (ATOMID(type) == ATOMID("iSFM")) { pAtom = new MP4ISFMAtom(); } else if (ATOMID(type) == ATOMID("iods")) { pAtom = new MP4IodsAtom(); } else if (ATOMID(type) == ATOMID("ipir")) { pAtom = new MP4TrefTypeAtom(type); } else if (ATOMID(type) == ATOMID("ilst")) { /* Apple iTunes */ pAtom = new MP4IlstAtom(); } break; case 'm': if (ATOMID(type) == ATOMID("mdia")) { pAtom = new MP4MdiaAtom(); } else if (ATOMID(type) == ATOMID("minf")) { pAtom = new MP4MinfAtom(); } else if (ATOMID(type) == ATOMID("mdhd")) { pAtom = new MP4MdhdAtom(); } else if (ATOMID(type) == ATOMID("mdat")) { pAtom = new MP4MdatAtom(); } else if (ATOMID(type) == ATOMID("moov")) { pAtom = new MP4MoovAtom(); } else if (ATOMID(type) == ATOMID("mvhd")) { pAtom = new MP4MvhdAtom(); } else if (ATOMID(type) == ATOMID("mpod")) { pAtom = new MP4TrefTypeAtom(type); } else if (ATOMID(type) == ATOMID("mp4a")) { pAtom = new MP4Mp4aAtom(); } else if (ATOMID(type) == ATOMID("mp4s")) { pAtom = new MP4Mp4sAtom(); } else if (ATOMID(type) == ATOMID("mp4v")) { pAtom = new MP4Mp4vAtom(); } else if (ATOMID(type) == ATOMID("moof")) { pAtom = new MP4MoofAtom(); } else if (ATOMID(type) == ATOMID("mfhd")) { pAtom = new MP4MfhdAtom(); } else if (ATOMID(type) == ATOMID("mvex")) { pAtom = new MP4MvexAtom(); } else if (ATOMID(type) == ATOMID("maxr")) { pAtom = new MP4MaxrAtom(); } else if (ATOMID(type) == ATOMID("meta")) { /* Apple iTunes */ pAtom = new MP4MetaAtom(); } else if (ATOMID(type) == ATOMID("mean")) { /* Apple iTunes */ pAtom = new MP4MeanAtom(); } break; case 'n': if (ATOMID(type) == ATOMID("nmhd")) { pAtom = new MP4NmhdAtom(); } else if (ATOMID(type) == ATOMID("nump")) { pAtom = new MP4NumpAtom(); } else if (ATOMID(type) == ATOMID("name")) { pAtom = new MP4NameAtom(); } break; case 'p': if (ATOMID(type) == ATOMID("pmax")) { pAtom = new MP4PmaxAtom(); } else if (ATOMID(type) == ATOMID("payt")) { pAtom = new MP4PaytAtom(); } break; case 'r': if (ATOMID(type) == ATOMID("rtp ")) { pAtom = new MP4RtpAtom(); } break; case 's': if (ATOMID(type) == ATOMID("schi")) { pAtom = new MP4SchiAtom(); } else if (ATOMID(type) == ATOMID("schm")) { pAtom = new MP4SchmAtom(); } else if (ATOMID(type) == ATOMID("sinf")) { pAtom = new MP4SinfAtom(); } else if (ATOMID(type) == ATOMID("stbl")) { pAtom = new MP4StblAtom(); } else if (ATOMID(type) == ATOMID("stsd")) { pAtom = new MP4StsdAtom(); } else if (ATOMID(type) == ATOMID("stts")) { pAtom = new MP4SttsAtom(); } else if (ATOMID(type) == ATOMID("stsz")) { pAtom = new MP4StszAtom(); } else if (ATOMID(type) == ATOMID("stsc")) { pAtom = new MP4StscAtom(); } else if (ATOMID(type) == ATOMID("stco")) { pAtom = new MP4StcoAtom(); } else if (ATOMID(type) == ATOMID("stss")) { pAtom = new MP4StssAtom(); } else if (ATOMID(type) == ATOMID("stsh")) { pAtom = new MP4StshAtom(); } else if (ATOMID(type) == ATOMID("stdp")) { pAtom = new MP4StdpAtom(); } else if (ATOMID(type) == ATOMID("smhd")) { pAtom = new MP4SmhdAtom(); } else if (ATOMID(type) == ATOMID("sdp ")) { pAtom = new MP4SdpAtom(); } else if (ATOMID(type) == ATOMID("snro")) { pAtom = new MP4SnroAtom(); } else if (ATOMID(type) == ATOMID("sync")) { pAtom = new MP4TrefTypeAtom(type); } else if (ATOMID(type) == ATOMID("skip")) { pAtom = new MP4FreeAtom(); pAtom->SetType("skip"); } break; case 't': if (ATOMID(type) == ATOMID("trak")) { pAtom = new MP4TrakAtom(); } else if (ATOMID(type) == ATOMID("tkhd")) { pAtom = new MP4TkhdAtom(); } else if (ATOMID(type) == ATOMID("tref")) { pAtom = new MP4TrefAtom(); } else if (ATOMID(type) == ATOMID("traf")) { pAtom = new MP4TrafAtom(); } else if (ATOMID(type) == ATOMID("tfhd")) { pAtom = new MP4TfhdAtom(); } else if (ATOMID(type) == ATOMID("trex")) { pAtom = new MP4TrexAtom(); } else if (ATOMID(type) == ATOMID("trun")) { pAtom = new MP4TrunAtom(); } else if (ATOMID(type) == ATOMID("tmin")) { pAtom = new MP4TminAtom(); } else if (ATOMID(type) == ATOMID("tmax")) { pAtom = new MP4TmaxAtom(); } else if (ATOMID(type) == ATOMID("trpy")) { pAtom = new MP4TrpyAtom(); } else if (ATOMID(type) == ATOMID("tpyl")) { pAtom = new MP4TpylAtom(); } else if (ATOMID(type) == ATOMID("tims")) { pAtom = new MP4TimsAtom(); } else if (ATOMID(type) == ATOMID("tsro")) { pAtom = new MP4TsroAtom(); } else if (ATOMID(type) == ATOMID("trkn")) { /* Apple iTunes */ pAtom = new MP4TrknAtom(); } else if (ATOMID(type) == ATOMID("tmpo")) { /* Apple iTunes */ pAtom = new MP4TmpoAtom(); } break; case 'u': if (ATOMID(type) == ATOMID("udta")) { pAtom = new MP4UdtaAtom(); } else if (ATOMID(type) == ATOMID("url ")) { pAtom = new MP4UrlAtom(); } else if (ATOMID(type) == ATOMID("urn ")) { pAtom = new MP4UrnAtom(); } break; case 'v': if (ATOMID(type) == ATOMID("vmhd")) { pAtom = new MP4VmhdAtom(); } break; case '�': if (ATOMID(type) == ATOMID("�nam")) { pAtom = new MP4NamAtom(); } else if (ATOMID(type) == ATOMID("�ART")) { /* Apple iTunes */ pAtom = new MP4ArtAtom(); } else if (ATOMID(type) == ATOMID("�wrt")) { /* Apple iTunes */ pAtom = new MP4WrtAtom(); } else if (ATOMID(type) == ATOMID("�alb")) { /* Apple iTunes */ pAtom = new MP4AlbAtom(); } else if (ATOMID(type) == ATOMID("�day")) { /* Apple iTunes */ pAtom = new MP4DayAtom(); } else if (ATOMID(type) == ATOMID("�too")) { /* Apple iTunes */ pAtom = new MP4TooAtom(); } else if (ATOMID(type) == ATOMID("�cmt")) { /* Apple iTunes */ pAtom = new MP4CmtAtom(); } else if (ATOMID(type) == ATOMID("�gen")) { /* Apple iTunes */ pAtom = new MP4GenAtom(); } break; case '-': if (ATOMID(type) == ATOMID("----")) { /* Apple iTunes */ pAtom = new MP4DashAtom(); } } } if (pAtom == NULL) { pAtom = new MP4Atom(type); pAtom->SetUnknownType(true); } ASSERT(pAtom); return pAtom; } // generate a skeletal self void MP4Atom::Generate() { u_int32_t i; // for all properties for (i = 0; i < m_pProperties.Size(); i++) { // ask it to self generate m_pProperties[i]->Generate(); } // for all mandatory, single child atom types for (i = 0; i < m_pChildAtomInfos.Size(); i++) { if (m_pChildAtomInfos[i]->m_mandatory && m_pChildAtomInfos[i]->m_onlyOne) { // create the mandatory, single child atom MP4Atom* pChildAtom = CreateAtom(m_pChildAtomInfos[i]->m_name); AddChildAtom(pChildAtom); // and ask it to self generate pChildAtom->Generate(); } } } MP4Atom* MP4Atom::ReadAtom(MP4File* pFile, MP4Atom* pParentAtom) { u_int8_t hdrSize = 8; u_int8_t extendedType[16]; u_int64_t pos = pFile->GetPosition(); VERBOSE_READ(pFile->GetVerbosity(), printf("ReadAtom: pos = 0x"LLX"\n", pos)); u_int64_t dataSize = pFile->ReadUInt32(); char type[5]; pFile->ReadBytes((u_int8_t*)&type[0], 4); type[4] = '\0'; // extended size if (dataSize == 1) { dataSize = pFile->ReadUInt64(); hdrSize += 8; } // extended type if (ATOMID(type) == ATOMID("uuid")) { pFile->ReadBytes(extendedType, sizeof(extendedType)); hdrSize += sizeof(extendedType); } if (dataSize == 0) { // extends to EOF dataSize = pFile->GetSize() - pos; } dataSize -= hdrSize; VERBOSE_READ(pFile->GetVerbosity(), printf("ReadAtom: type = %s data-size = "LLU" (0x"LLX")\n", type, dataSize, dataSize)); if (pos + hdrSize + dataSize > pParentAtom->GetEnd()) { VERBOSE_READ(pFile->GetVerbosity(), printf("ReadAtom: invalid atom size, extends outside parent atom\n")); throw new MP4Error("invalid atom size", "ReadAtom"); } MP4Atom* pAtom = CreateAtom(type); pAtom->SetFile(pFile); pAtom->SetStart(pos); pAtom->SetEnd(pos + hdrSize + dataSize); pAtom->SetSize(dataSize); if (ATOMID(type) == ATOMID("uuid")) { pAtom->SetExtendedType(extendedType); } if (pAtom->IsUnknownType()) { if (!IsReasonableType(pAtom->GetType())) { VERBOSE_READ(pFile->GetVerbosity(), printf("Warning: atom type %s is suspect\n", pAtom->GetType())); } else { VERBOSE_READ(pFile->GetVerbosity(), printf("Info: atom type %s is unknown\n", pAtom->GetType())); } if (dataSize > 0) { pAtom->AddProperty( new MP4BytesProperty("data", dataSize)); } } pAtom->SetParentAtom(pParentAtom); pAtom->Read(); return pAtom; } bool MP4Atom::IsReasonableType(const char* type) { for (u_int8_t i = 0; i < 4; i++) { if (isalnum(type[i])) { continue; } if (i == 3 && type[i] == ' ') { continue; } return false; } return true; } // generic read void MP4Atom::Read() { ASSERT(m_pFile); if (ATOMID(m_type) != 0 && m_size > 1000000) { VERBOSE_READ(GetVerbosity(), printf("Warning: %s atom size "LLU" is suspect\n", m_type, m_size)); } ReadProperties(); // read child atoms, if we expect there to be some if (m_pChildAtomInfos.Size() > 0) { ReadChildAtoms(); } Skip(); // to end of atom } void MP4Atom::Skip() { if (m_pFile->GetPosition() != m_end) { VERBOSE_READ(m_pFile->GetVerbosity(), printf("Skip: "LLU" bytes\n", m_end - m_pFile->GetPosition())); } m_pFile->SetPosition(m_end); } MP4Atom* MP4Atom::FindAtom(const char* name) { if (!IsMe(name)) { return NULL; } if (!IsRootAtom()) { VERBOSE_FIND(m_pFile->GetVerbosity(), printf("FindAtom: matched %s\n", name)); name = MP4NameAfterFirst(name); // I'm the sought after atom if (name == NULL) { return this; } } // else it's one of my children return FindChildAtom(name); } bool MP4Atom::FindProperty(const char *name, MP4Property** ppProperty, u_int32_t* pIndex) { if (!IsMe(name)) { return false; } if (!IsRootAtom()) { VERBOSE_FIND(m_pFile->GetVerbosity(), printf("FindProperty: matched %s\n", name)); name = MP4NameAfterFirst(name); // no property name given if (name == NULL) { return false; } } return FindContainedProperty(name, ppProperty, pIndex); } bool MP4Atom::IsMe(const char* name) { if (name == NULL) { return false; } // root atom always matches if (!strcmp(m_type, "")) { return true; } // check if our atom name is specified as the first component if (!MP4NameFirstMatches(m_type, name)) { return false; } return true; } MP4Atom* MP4Atom::FindChildAtom(const char* name) { u_int32_t atomIndex = 0; // get the index if we have one, e.g. moov.trak[2].mdia... MP4NameFirstIndex(name, &atomIndex); // need to get to the index'th child atom of the right type for (u_int32_t i = 0; i < m_pChildAtoms.Size(); i++) { if (MP4NameFirstMatches(m_pChildAtoms[i]->GetType(), name)) { if (atomIndex == 0) { // this is the one, ask it to match return m_pChildAtoms[i]->FindAtom(name); } atomIndex--; } } return NULL; } bool MP4Atom::FindContainedProperty(const char *name, MP4Property** ppProperty, u_int32_t* pIndex) { u_int32_t numProperties = m_pProperties.Size(); u_int32_t i; // check all of our properties for (i = 0; i < numProperties; i++) { if (m_pProperties[i]->FindProperty(name, ppProperty, pIndex)) { return true; } } // not one of our properties, // presumably one of our children's properties // check child atoms... // check if we have an index, e.g. trak[2].mdia... u_int32_t atomIndex = 0; MP4NameFirstIndex(name, &atomIndex); // need to get to the index'th child atom of the right type for (i = 0; i < m_pChildAtoms.Size(); i++) { if (MP4NameFirstMatches(m_pChildAtoms[i]->GetType(), name)) { if (atomIndex == 0) { // this is the one, ask it to match return m_pChildAtoms[i]->FindProperty(name, ppProperty, pIndex); } atomIndex--; } } VERBOSE_FIND(m_pFile->GetVerbosity(), printf("FindProperty: no match for %s\n", name)); return false; } void MP4Atom::ReadProperties(u_int32_t startIndex, u_int32_t count) { u_int32_t numProperties = MIN(count, m_pProperties.Size() - startIndex); // read any properties of the atom for (u_int32_t i = startIndex; i < startIndex + numProperties; i++) { m_pProperties[i]->Read(m_pFile); if (m_pFile->GetPosition() > m_end) { VERBOSE_READ(GetVerbosity(), printf("ReadProperties: insufficient data for property: %s pos 0x"LLX" atom end 0x"LLX"\n", m_pProperties[i]->GetName(), m_pFile->GetPosition(), m_end)); throw new MP4Error("atom is too small", "Atom ReadProperties"); } if (m_pProperties[i]->GetType() == TableProperty) { VERBOSE_READ_TABLE(GetVerbosity(), printf("Read: "); m_pProperties[i]->Dump(stdout, 0, true)); } else if (m_pProperties[i]->GetType() != DescriptorProperty) { VERBOSE_READ(GetVerbosity(), printf("Read: "); m_pProperties[i]->Dump(stdout, 0, true)); } } } void MP4Atom::ReadChildAtoms() { VERBOSE_READ(GetVerbosity(), printf("ReadChildAtoms: of %s\n", m_type[0] ? m_type : "root")); // read any child atoms while (m_pFile->GetPosition() < m_end) { MP4Atom* pChildAtom = MP4Atom::ReadAtom(m_pFile, this); AddChildAtom(pChildAtom); MP4AtomInfo* pChildAtomInfo = FindAtomInfo(pChildAtom->GetType()); // if child atom is of known type // but not expected here print warning if (pChildAtomInfo == NULL && !pChildAtom->IsUnknownType()) { VERBOSE_READ(GetVerbosity(), printf("Warning: In atom %s unexpected child atom %s\n", GetType(), pChildAtom->GetType())); } // if child atoms should have just one instance // and this is more than one, print warning if (pChildAtomInfo) { pChildAtomInfo->m_count++; if (pChildAtomInfo->m_onlyOne && pChildAtomInfo->m_count > 1) { VERBOSE_READ(GetVerbosity(), printf("Warning: In atom %s multiple child atoms %s\n", GetType(), pChildAtom->GetType())); } } } // if mandatory child atom doesn't exist, print warning u_int32_t numAtomInfo = m_pChildAtomInfos.Size(); for (u_int32_t i = 0; i < numAtomInfo; i++) { if (m_pChildAtomInfos[i]->m_mandatory && m_pChildAtomInfos[i]->m_count == 0) { VERBOSE_READ(GetVerbosity(), printf("Warning: In atom %s missing child atom %s\n", GetType(), m_pChildAtomInfos[i]->m_name)); } } VERBOSE_READ(GetVerbosity(), printf("ReadChildAtoms: finished %s\n", m_type)); } MP4AtomInfo* MP4Atom::FindAtomInfo(const char* name) { u_int32_t numAtomInfo = m_pChildAtomInfos.Size(); for (u_int32_t i = 0; i < numAtomInfo; i++) { if (ATOMID(m_pChildAtomInfos[i]->m_name) == ATOMID(name)) { return m_pChildAtomInfos[i]; } } return NULL; } // generic write void MP4Atom::Write() { ASSERT(m_pFile); BeginWrite(); WriteProperties(); WriteChildAtoms(); FinishWrite(); } void MP4Atom::BeginWrite(bool use64) { m_start = m_pFile->GetPosition(); //use64 = m_pFile->Use64Bits(); if (use64) { m_pFile->WriteUInt32(1); } else { m_pFile->WriteUInt32(0); } m_pFile->WriteBytes((u_int8_t*)&m_type[0], 4); if (use64) { m_pFile->WriteUInt64(0); } if (ATOMID(m_type) == ATOMID("uuid")) { m_pFile->WriteBytes(m_extendedType, sizeof(m_extendedType)); } } void MP4Atom::FinishWrite(bool use64) { m_end = m_pFile->GetPosition(); m_size = (m_end - m_start); //use64 = m_pFile->Use64Bits(); if (use64) { m_pFile->SetPosition(m_start + 8); m_pFile->WriteUInt64(m_size); } else { ASSERT(m_size <= (u_int64_t)0xFFFFFFFF); m_pFile->SetPosition(m_start); m_pFile->WriteUInt32(m_size); } m_pFile->SetPosition(m_end); // adjust size to just reflect data portion of atom m_size -= (use64 ? 16 : 8); if (ATOMID(m_type) == ATOMID("uuid")) { m_size -= sizeof(m_extendedType); } } void MP4Atom::WriteProperties(u_int32_t startIndex, u_int32_t count) { u_int32_t numProperties = MIN(count, m_pProperties.Size() - startIndex); VERBOSE_WRITE(GetVerbosity(), printf("Write: type %s\n", m_type)); for (u_int32_t i = startIndex; i < startIndex + numProperties; i++) { m_pProperties[i]->Write(m_pFile); if (m_pProperties[i]->GetType() == TableProperty) { VERBOSE_WRITE_TABLE(GetVerbosity(), printf("Write: "); m_pProperties[i]->Dump(stdout, 0, false)); } else { VERBOSE_WRITE(GetVerbosity(), printf("Write: "); m_pProperties[i]->Dump(stdout, 0, false)); } } } void MP4Atom::WriteChildAtoms() { u_int32_t size = m_pChildAtoms.Size(); for (u_int32_t i = 0; i < size; i++) { m_pChildAtoms[i]->Write(); } VERBOSE_WRITE(GetVerbosity(), printf("Write: finished %s\n", m_type)); } void MP4Atom::AddProperty(MP4Property* pProperty) { ASSERT(pProperty); m_pProperties.Add(pProperty); pProperty->SetParentAtom(this); } void MP4Atom::AddVersionAndFlags() { AddProperty(new MP4Integer8Property("version")); AddProperty(new MP4Integer24Property("flags")); } void MP4Atom::AddReserved(char* name, u_int32_t size) { MP4BytesProperty* pReserved = new MP4BytesProperty(name, size); pReserved->SetReadOnly(); AddProperty(pReserved); } void MP4Atom::ExpectChildAtom(const char* name, bool mandatory, bool onlyOne) { m_pChildAtomInfos.Add(new MP4AtomInfo(name, mandatory, onlyOne)); } u_int8_t MP4Atom::GetVersion() { if (strcmp("version", m_pProperties[0]->GetName())) { return 0; } return ((MP4Integer8Property*)m_pProperties[0])->GetValue(); } void MP4Atom::SetVersion(u_int8_t version) { if (strcmp("version", m_pProperties[0]->GetName())) { return; } ((MP4Integer8Property*)m_pProperties[0])->SetValue(version); } u_int32_t MP4Atom::GetFlags() { if (strcmp("flags", m_pProperties[1]->GetName())) { return 0; } return ((MP4Integer24Property*)m_pProperties[1])->GetValue(); } void MP4Atom::SetFlags(u_int32_t flags) { if (strcmp("flags", m_pProperties[1]->GetName())) { return; } ((MP4Integer24Property*)m_pProperties[1])->SetValue(flags); } void MP4Atom::Dump(FILE* pFile, u_int8_t indent, bool dumpImplicits) { if (m_type[0] != '\0') { Indent(pFile, indent); fprintf(pFile, "type %s\n", m_type); } u_int32_t i; u_int32_t size; // dump our properties size = m_pProperties.Size(); for (i = 0; i < size; i++) { /* skip details of tables unless we're told to be verbose */ if (m_pProperties[i]->GetType() == TableProperty && !(GetVerbosity() & MP4_DETAILS_TABLE)) { Indent(pFile, indent + 1); fprintf(pFile, "<table entries suppressed>\n"); continue; } m_pProperties[i]->Dump(pFile, indent + 1, dumpImplicits); } // dump our children size = m_pChildAtoms.Size(); for (i = 0; i < size; i++) { m_pChildAtoms[i]->Dump(pFile, indent + 1, dumpImplicits); } } u_int32_t MP4Atom::GetVerbosity() { ASSERT(m_pFile); return m_pFile->GetVerbosity(); } u_int8_t MP4Atom::GetDepth() { if (m_depth < 0xFF) { return m_depth; } MP4Atom *pAtom = this; m_depth = 0; while ((pAtom = pAtom->GetParentAtom()) != NULL) { m_depth++; ASSERT(m_depth < 255); } return m_depth; }