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Diffstat (limited to 'src/descriptors.cpp')
| -rw-r--r-- | src/descriptors.cpp | 615 |
1 files changed, 615 insertions, 0 deletions
diff --git a/src/descriptors.cpp b/src/descriptors.cpp new file mode 100644 index 0000000..2896920 --- /dev/null +++ b/src/descriptors.cpp @@ -0,0 +1,615 @@ +/* + * 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 dmackie@cisco.com + */ + +#include "src/impl.h" + +namespace mp4v2 { +namespace impl { + +/////////////////////////////////////////////////////////////////////////////// + +MP4BaseDescriptor::MP4BaseDescriptor (uint8_t tag) : MP4Descriptor(tag) +{ + switch (tag) { + case MP4ESIDIncDescrTag: + AddProperty( /* 0 */ + new MP4Integer32Property("id")); + break; + case MP4ESIDRefDescrTag: + AddProperty( /* 0 */ + new MP4Integer16Property("refIndex")); + break; + case MP4IPIPtrDescrTag: + AddProperty( /* 0 */ + new MP4Integer16Property("IPIESId")); + break; + case MP4SupplContentIdDescrTag: + AddProperty( /* 0 */ + new MP4BytesProperty("languageCode", 3)); + AddProperty( /* 1 */ + new MP4StringProperty("title", Counted)); + AddProperty( /* 2 */ + new MP4StringProperty("value", Counted)); + break; + case MP4IPMPPtrDescrTag: + AddProperty( /* 0 */ + new MP4Integer8Property("IPMPDescriptorId")); + break; + case MP4ExtProfileLevelDescrTag: + AddProperty( /* 0 */ + new MP4Integer8Property("profileLevelIndicationIndex")); + AddProperty( /* 1 */ + new MP4Integer8Property("ODProfileLevelIndication")); + AddProperty( /* 2 */ + new MP4Integer8Property("sceneProfileLevelIndication")); + AddProperty( /* 3 */ + new MP4Integer8Property("audioProfileLevelIndication")); + AddProperty( /* 4 */ + new MP4Integer8Property("visualProfileLevelIndication")); + AddProperty( /* 5 */ + new MP4Integer8Property("graphicsProfileLevelIndication")); + AddProperty( /* 6 */ + new MP4Integer8Property("MPEGJProfileLevelIndication")); + break; + default: + MP4Printf("error in base descriptor - tag %u", tag); + break; + + } +} + +MP4BytesDescriptor::MP4BytesDescriptor (uint8_t tag) : MP4Descriptor(tag) +{ + m_size_offset = 0; + m_bytes_index = 0; + if (tag >= MP4ExtDescrTagsStart && tag <= MP4ExtDescrTagsEnd) { + AddProperty( /* 0 */ + new MP4BytesProperty("data")); + } else { + switch (tag) { + case MP4DecSpecificDescrTag: + AddProperty( /* 0 */ + new MP4BytesProperty("info")); + // no change to m_size + break; + case MP4IPMPDescrTag: + AddProperty( /* 0 */ + new MP4Integer8Property("IPMPDescriptorId")); + AddProperty( /* 1 */ + new MP4Integer16Property("IPMPSType")); + AddProperty( /* 2 */ + new MP4BytesProperty("IPMPData")); + /* note: if IPMPSType == 0, IPMPData is an URL */ + m_size_offset = 3; + m_bytes_index = 2; + break; + case MP4RegistrationDescrTag: + AddProperty( /* 0 */ + new MP4Integer32Property("formatIdentifier")); + AddProperty( /* 1 */ + new MP4BytesProperty("additionalIdentificationInfo")); + m_size_offset = 4; + m_bytes_index = 1; + break; + default: + MP4Printf("error in bytes descriptor - tag %u", tag); + break; + } + } +} + +void MP4BytesDescriptor::Read(MP4File *pFile) +{ + ReadHeader(pFile); + + /* byte properties need to know how long they are before reading */ + ((MP4BytesProperty*)m_pProperties[m_bytes_index])->SetValueSize(m_size - m_size_offset); + + ReadProperties(pFile); +} +MP4IODescriptor::MP4IODescriptor() + : MP4Descriptor(MP4FileIODescrTag) +{ + /* N.B. other member functions depend on the property indicies */ + AddProperty( /* 0 */ + new MP4BitfieldProperty("objectDescriptorId", 10)); + AddProperty( /* 1 */ + new MP4BitfieldProperty("URLFlag", 1)); + AddProperty( /* 2 */ + new MP4BitfieldProperty("includeInlineProfileLevelFlag", 1)); + AddProperty( /* 3 */ + new MP4BitfieldProperty("reserved", 4)); + AddProperty( /* 4 */ + new MP4StringProperty("URL", Counted)); + AddProperty( /* 5 */ + new MP4Integer8Property("ODProfileLevelId")); + AddProperty( /* 6 */ + new MP4Integer8Property("sceneProfileLevelId")); + AddProperty( /* 7 */ + new MP4Integer8Property("audioProfileLevelId")); + AddProperty( /* 8 */ + new MP4Integer8Property("visualProfileLevelId")); + AddProperty( /* 9 */ + new MP4Integer8Property("graphicsProfileLevelId")); + AddProperty( /* 10 */ + new MP4DescriptorProperty("esIds", + MP4ESIDIncDescrTag, 0, Required, Many)); + AddProperty( /* 11 */ + new MP4DescriptorProperty("ociDescr", + MP4OCIDescrTagsStart, MP4OCIDescrTagsEnd, Optional, Many)); + AddProperty( /* 12 */ + new MP4DescriptorProperty("ipmpDescrPtr", + MP4IPMPPtrDescrTag, 0, Optional, Many)); + AddProperty( /* 13 */ + new MP4DescriptorProperty("extDescr", + MP4ExtDescrTagsStart, MP4ExtDescrTagsEnd, Optional, Many)); + + SetReadMutate(2); +} + +void MP4IODescriptor::Generate() +{ + ((MP4BitfieldProperty*)m_pProperties[0])->SetValue(1); + ((MP4BitfieldProperty*)m_pProperties[3])->SetValue(0xF); + for (uint32_t i = 5; i <= 9; i++) { + ((MP4Integer8Property*)m_pProperties[i])->SetValue(0xFF); + } +} + +void MP4IODescriptor::Mutate() +{ + bool urlFlag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue(); + + m_pProperties[4]->SetImplicit(!urlFlag); + for (uint32_t i = 5; i <= 12; i++) { + m_pProperties[i]->SetImplicit(urlFlag); + } +} + +MP4ODescriptor::MP4ODescriptor() + : MP4Descriptor(MP4FileODescrTag) +{ + /* N.B. other member functions depend on the property indicies */ + AddProperty( /* 0 */ + new MP4BitfieldProperty("objectDescriptorId", 10)); + AddProperty( /* 1 */ + new MP4BitfieldProperty("URLFlag", 1)); + AddProperty( /* 2 */ + new MP4BitfieldProperty("reserved", 5)); + AddProperty( /* 3 */ + new MP4StringProperty("URL", Counted)); + AddProperty( /* 4 */ + new MP4DescriptorProperty("esIds", + MP4ESIDRefDescrTag, 0, Required, Many)); + AddProperty( /* 5 */ + new MP4DescriptorProperty("ociDescr", + MP4OCIDescrTagsStart, MP4OCIDescrTagsEnd, Optional, Many)); + AddProperty( /* 6 */ + new MP4DescriptorProperty("ipmpDescrPtr", + MP4IPMPPtrDescrTag, 0, Optional, Many)); + AddProperty( /* 7 */ + new MP4DescriptorProperty("extDescr", + MP4ExtDescrTagsStart, MP4ExtDescrTagsEnd, Optional, Many)); + + SetReadMutate(2); +} + +void MP4ODescriptor::Generate() +{ + ((MP4BitfieldProperty*)m_pProperties[2])->SetValue(0x1F); +} + +void MP4ODescriptor::Mutate() +{ + bool urlFlag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue(); + + m_pProperties[3]->SetImplicit(!urlFlag); + for (uint32_t i = 4; i <= 6; i++) { + m_pProperties[i]->SetImplicit(urlFlag); + } +} + +MP4ESDescriptor::MP4ESDescriptor() + : MP4Descriptor(MP4ESDescrTag) +{ + /* N.B. other class functions depend on the property indicies */ + AddProperty( /* 0 */ + new MP4Integer16Property("ESID")); + AddProperty( /* 1 */ + new MP4BitfieldProperty("streamDependenceFlag", 1)); + AddProperty( /* 2 */ + new MP4BitfieldProperty("URLFlag", 1)); + AddProperty( /* 3 */ + new MP4BitfieldProperty("OCRstreamFlag", 1)); + AddProperty( /* 4 */ + new MP4BitfieldProperty("streamPriority", 5)); + AddProperty( /* 5 */ + new MP4Integer16Property("dependsOnESID")); + AddProperty( /* 6 */ + new MP4StringProperty("URL", Counted)); + AddProperty( /* 7 */ + new MP4Integer16Property("OCRESID")); + AddProperty( /* 8 */ + new MP4DescriptorProperty("decConfigDescr", + MP4DecConfigDescrTag, 0, Required, OnlyOne)); + AddProperty( /* 9 */ + new MP4DescriptorProperty("slConfigDescr", + MP4SLConfigDescrTag, 0, Required, OnlyOne)); + AddProperty( /* 10 */ + new MP4DescriptorProperty("ipiPtr", + MP4IPIPtrDescrTag, 0, Optional, OnlyOne)); + AddProperty( /* 11 */ + new MP4DescriptorProperty("ipIds", + MP4ContentIdDescrTag, MP4SupplContentIdDescrTag, Optional, Many)); + AddProperty( /* 12 */ + new MP4DescriptorProperty("ipmpDescrPtr", + MP4IPMPPtrDescrTag, 0, Optional, Many)); + AddProperty( /* 13 */ + new MP4DescriptorProperty("langDescr", + MP4LanguageDescrTag, 0, Optional, Many)); + AddProperty( /* 14 */ + new MP4DescriptorProperty("qosDescr", + MP4QosDescrTag, 0, Optional, OnlyOne)); + AddProperty( /* 15 */ + new MP4DescriptorProperty("regDescr", + MP4RegistrationDescrTag, 0, Optional, OnlyOne)); + AddProperty( /* 16 */ + new MP4DescriptorProperty("extDescr", + MP4ExtDescrTagsStart, MP4ExtDescrTagsEnd, Optional, Many)); + + SetReadMutate(5); +} + +void MP4ESDescriptor::Mutate() +{ + bool streamDependFlag = + ((MP4BitfieldProperty*)m_pProperties[1])->GetValue(); + m_pProperties[5]->SetImplicit(!streamDependFlag); + + bool urlFlag = + ((MP4BitfieldProperty*)m_pProperties[2])->GetValue(); + m_pProperties[6]->SetImplicit(!urlFlag); + + bool ocrFlag = + ((MP4BitfieldProperty*)m_pProperties[3])->GetValue(); + m_pProperties[7]->SetImplicit(!ocrFlag); +} + +MP4DecConfigDescriptor::MP4DecConfigDescriptor() + : MP4Descriptor(MP4DecConfigDescrTag) +{ + AddProperty( /* 0 */ + new MP4Integer8Property("objectTypeId")); + AddProperty( /* 1 */ + new MP4BitfieldProperty("streamType", 6)); + AddProperty( /* 2 */ + new MP4BitfieldProperty("upStream", 1)); + AddProperty( /* 3 */ + new MP4BitfieldProperty("reserved", 1)); + AddProperty( /* 4 */ + new MP4BitfieldProperty("bufferSizeDB", 24)); + AddProperty( /* 5 */ + new MP4Integer32Property("maxBitrate")); + AddProperty( /* 6 */ + new MP4Integer32Property("avgBitrate")); + AddProperty( /* 7 */ + new MP4DescriptorProperty("decSpecificInfo", + MP4DecSpecificDescrTag, 0, Optional, OnlyOne)); + AddProperty( /* 8 */ + new MP4DescriptorProperty("profileLevelIndicationIndexDescr", + MP4ExtProfileLevelDescrTag, 0, Optional, Many)); +} + +void MP4DecConfigDescriptor::Generate() +{ + ((MP4BitfieldProperty*)m_pProperties[3])->SetValue(1); +} + +MP4SLConfigDescriptor::MP4SLConfigDescriptor() + : MP4Descriptor(MP4SLConfigDescrTag) +{ + AddProperty( /* 0 */ + new MP4Integer8Property("predefined")); + AddProperty( /* 1 */ + new MP4BitfieldProperty("useAccessUnitStartFlag", 1)); + AddProperty( /* 2 */ + new MP4BitfieldProperty("useAccessUnitEndFlag", 1)); + AddProperty( /* 3 */ + new MP4BitfieldProperty("useRandomAccessPointFlag", 1)); + AddProperty( /* 4 */ + new MP4BitfieldProperty("hasRandomAccessUnitsOnlyFlag", 1)); + AddProperty( /* 5 */ + new MP4BitfieldProperty("usePaddingFlag", 1)); + AddProperty( /* 6 */ + new MP4BitfieldProperty("useTimeStampsFlag", 1)); + AddProperty( /* 7 */ + new MP4BitfieldProperty("useIdleFlag", 1)); + AddProperty( /* 8 */ + new MP4BitfieldProperty("durationFlag", 1)); + AddProperty( /* 9 */ + new MP4Integer32Property("timeStampResolution")); + AddProperty( /* 10 */ + new MP4Integer32Property("OCRResolution")); + AddProperty( /* 11 */ + new MP4Integer8Property("timeStampLength")); + AddProperty( /* 12 */ + new MP4Integer8Property("OCRLength")); + AddProperty( /* 13 */ + new MP4Integer8Property("AULength")); + AddProperty( /* 14 */ + new MP4Integer8Property("instantBitrateLength")); + AddProperty( /* 15 */ + new MP4BitfieldProperty("degradationPriortyLength", 4)); + AddProperty( /* 16 */ + new MP4BitfieldProperty("AUSeqNumLength", 5)); + AddProperty( /* 17 */ + new MP4BitfieldProperty("packetSeqNumLength", 5)); + AddProperty( /* 18 */ + new MP4BitfieldProperty("reserved", 2)); + + // if durationFlag + AddProperty( /* 19 */ + new MP4Integer32Property("timeScale")); + AddProperty( /* 20 */ + new MP4Integer16Property("accessUnitDuration")); + AddProperty( /* 21 */ + new MP4Integer16Property("compositionUnitDuration")); + + // if !useTimeStampsFlag + AddProperty( /* 22 */ + new MP4BitfieldProperty("startDecodingTimeStamp", 64)); + AddProperty( /* 23 */ + new MP4BitfieldProperty("startCompositionTimeStamp", 64)); +} + +void MP4SLConfigDescriptor::Generate() +{ + // by default all tracks in an mp4 file + // use predefined SLConfig descriptor == 2 + ((MP4Integer8Property*)m_pProperties[0])->SetValue(2); + + // which implies UseTimestampsFlag = 1 + ((MP4BitfieldProperty*)m_pProperties[6])->SetValue(1); + + // reserved = 3 + ((MP4BitfieldProperty*)m_pProperties[18])->SetValue(3); +} + +void MP4SLConfigDescriptor::Read(MP4File* pFile) +{ + ReadHeader(pFile); + + // read the first property, 'predefined' + ReadProperties(pFile, 0, 1); + + // if predefined == 0 + if (((MP4Integer8Property*)m_pProperties[0])->GetValue() == 0) { + + /* read the next 18 properties */ + ReadProperties(pFile, 1, 18); + } + + // now mutate + Mutate(); + + // and read the remaining properties + ReadProperties(pFile, 19); +} + +void MP4SLConfigDescriptor::Mutate() +{ + uint32_t i; + uint8_t predefined = + ((MP4Integer8Property*)m_pProperties[0])->GetValue(); + + if (predefined) { + // properties 1-18 are implicit + for (i = 1; i < m_pProperties.Size(); i++) { + m_pProperties[i]->SetImplicit(true); + } + + if (predefined == 1) { + // UseTimestampsFlag = 0 + ((MP4BitfieldProperty*)m_pProperties[6])->SetValue(0); + + // TimestampResolution = 1000 + ((MP4Integer32Property*)m_pProperties[9])->SetValue(1000); + + // TimeStampLength = 32 + ((MP4Integer8Property*)m_pProperties[11])->SetValue(32); + + } else if (predefined == 2) { + // UseTimestampsFlag = 1 + ((MP4BitfieldProperty*)m_pProperties[6])->SetValue(1); + } + } else { +#if 1 + for (i = 1; i <= 18; i++) { + m_pProperties[i]->SetImplicit(false); + } + ((MP4BitfieldProperty*)m_pProperties[18])->SetValue(3); +#endif + } + + bool durationFlag = + ((MP4BitfieldProperty*)m_pProperties[8])->GetValue(); + + for (i = 19; i <= 21; i++) { + m_pProperties[i]->SetImplicit(!durationFlag); + } + + bool useTimeStampsFlag = + ((MP4BitfieldProperty*)m_pProperties[6])->GetValue(); + + for (i = 22; i <= 23; i++) { + m_pProperties[i]->SetImplicit(useTimeStampsFlag); + + uint8_t timeStampLength = min((uint8_t)64, + ((MP4Integer8Property*)m_pProperties[11])->GetValue()); + + ((MP4BitfieldProperty*)m_pProperties[i])->SetNumBits(timeStampLength); + + // handle a nonsensical situation gracefully + if (timeStampLength == 0) { + m_pProperties[i]->SetImplicit(true); + } + } +} + +MP4ContentIdDescriptor::MP4ContentIdDescriptor() + : MP4Descriptor(MP4ContentIdDescrTag) +{ + AddProperty( /* 0 */ + new MP4BitfieldProperty("compatibility", 2)); + AddProperty( /* 1 */ + new MP4BitfieldProperty("contentTypeFlag", 1)); + AddProperty( /* 2 */ + new MP4BitfieldProperty("contentIdFlag", 1)); + AddProperty( /* 3 */ + new MP4BitfieldProperty("protectedContent", 1)); + AddProperty( /* 4 */ + new MP4BitfieldProperty("reserved", 3)); + AddProperty( /* 5 */ + new MP4Integer8Property("contentType")); + AddProperty( /* 6 */ + new MP4Integer8Property("contentIdType")); + AddProperty( /* 7 */ + new MP4BytesProperty("contentId")); +} + +void MP4ContentIdDescriptor::Read(MP4File* pFile) +{ + ReadHeader(pFile); + + /* read the first property, 'compatiblity' */ + ReadProperties(pFile, 0, 1); + + /* if compatiblity != 0 */ + if (((MP4Integer8Property*)m_pProperties[0])->GetValue() != 0) { + /* we don't understand it */ + VERBOSE_READ(pFile->GetVerbosity(), + printf("incompatible content id descriptor\n")); + return; + } + + /* read the next four properties */ + ReadProperties(pFile, 1, 4); + + /* which allows us to reconfigure ourselves */ + Mutate(); + + bool contentTypeFlag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue(); + + bool contentIdFlag = ((MP4BitfieldProperty*)m_pProperties[2])->GetValue(); + + if (contentIdFlag) { + + uint32_t cIdOffset = 2; + + if (contentTypeFlag) { + + cIdOffset++; + + } + + ((MP4BytesProperty*)m_pProperties[7])->SetValueSize(m_size - cIdOffset); + + } + + + + /* read the remaining properties */ + ReadProperties(pFile, 5); +} + +void MP4ContentIdDescriptor::Mutate() +{ + bool contentTypeFlag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue(); + m_pProperties[5]->SetImplicit(!contentTypeFlag); + + bool contentIdFlag = ((MP4BitfieldProperty*)m_pProperties[2])->GetValue(); + m_pProperties[6]->SetImplicit(!contentIdFlag); + m_pProperties[7]->SetImplicit(!contentIdFlag); + +} + +MP4Descriptor* MP4DescriptorProperty::CreateDescriptor(uint8_t tag) +{ + MP4Descriptor* pDescriptor = NULL; + + switch (tag) { + case MP4ESDescrTag: + pDescriptor = new MP4ESDescriptor(); + break; + case MP4DecConfigDescrTag: + pDescriptor = new MP4DecConfigDescriptor(); + break; + case MP4DecSpecificDescrTag: + case MP4IPMPDescrTag: + case MP4RegistrationDescrTag: + pDescriptor = new MP4BytesDescriptor(tag); + break; + case MP4SLConfigDescrTag: + pDescriptor = new MP4SLConfigDescriptor(); + break; + case MP4ContentIdDescrTag: + pDescriptor = new MP4ContentIdDescriptor(); + break; + case MP4ESIDIncDescrTag: + case MP4ESIDRefDescrTag: + case MP4IPIPtrDescrTag: + case MP4SupplContentIdDescrTag: + case MP4IPMPPtrDescrTag: + case MP4ExtProfileLevelDescrTag: + pDescriptor = new MP4BaseDescriptor(tag); + break; + case MP4QosDescrTag: + pDescriptor = new MP4QosDescriptorBase(MP4QosDescrTag); + break; + case MP4IODescrTag: + case MP4FileIODescrTag: + pDescriptor = new MP4IODescriptor(); + pDescriptor->SetTag(tag); + break; + case MP4ODescrTag: + case MP4FileODescrTag: + pDescriptor = new MP4ODescriptor(); + pDescriptor->SetTag(tag); + break; + } + + if (pDescriptor == NULL) { + if (tag >= MP4OCIDescrTagsStart && tag <= MP4OCIDescrTagsEnd) { + pDescriptor = CreateOCIDescriptor(tag); + } + + if (tag >= MP4ExtDescrTagsStart && tag <= MP4ExtDescrTagsEnd) { + pDescriptor = new MP4BytesDescriptor(tag); + } + } + + return pDescriptor; +} + +/////////////////////////////////////////////////////////////////////////////// + +} +} // namespace mp4v2::impl |