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Edit File: descriptors.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		dmackie@cisco.com
 */

#include "mp4common.h"

MP4BaseDescriptor::MP4BaseDescriptor (u_int8_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 (u_int8_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 (u_int32_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 (u_int32_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 (u_int32_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()
{
	u_int32_t i;
	u_int8_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);

u_int8_t timeStampLength = MIN(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) {

u_int32_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(u_int8_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;
}