atom_avcC.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. 2004.  All Rights Reserved.
 * 
 * Contributor(s): 
 *		Bill May wmay@cisco.com
 */

#include "mp4common.h"

/*
 * SizeTableProperty is a special version of the MP4TableProperty - 
 * the BytesProperty will need to set the value before it can read
 * from the file
 */
class SizeTableProperty : public MP4TableProperty 
{
 public:
  SizeTableProperty(char *name, MP4IntegerProperty *pCountProperty) :
    MP4TableProperty(name, pCountProperty) {};
 protected:
  void ReadEntry(MP4File *pFile, u_int32_t index) {
    // Each table has a size, followed by the length field
    // first, read the length
    m_pProperties[0]->Read(pFile, index);
    MP4IntegerProperty *pIntProp = (MP4IntegerProperty *)m_pProperties[0];
    // set the size in the bytes property
    MP4BytesProperty *pBytesProp = (MP4BytesProperty *)m_pProperties[1];
    pBytesProp->SetValueSize(pIntProp->GetValue(index), index);
    // And read the bytes
    m_pProperties[1]->Read(pFile, index);
  };
};

MP4AvcCAtom::MP4AvcCAtom() 
	: MP4Atom("avcC")
{
  MP4BitfieldProperty *pCount;
  MP4TableProperty *pTable;

  AddProperty( new MP4Integer8Property("configurationVersion")); /* 0 */

  AddProperty( new MP4Integer8Property("AVCProfileIndication")); /* 1 */

  AddProperty( new MP4Integer8Property("profile_compatibility")); /* 2 */

  AddProperty( new MP4Integer8Property("AVCLevelIndication")); /* 3 */

  AddProperty( new MP4BitfieldProperty("reserved", 6)); /* 4 */
  AddProperty( new MP4BitfieldProperty("lengthSizeMinusOne", 2)); /* 5 */
  AddProperty( new MP4BitfieldProperty("reserved1", 3)); /* 6 */
  pCount = new MP4BitfieldProperty("numOfSequenceParameterSets", 5);
  AddProperty(pCount); /* 7 */

  pTable = new SizeTableProperty("sequenceEntries", pCount);
  AddProperty(pTable); /* 8 */
  pTable->AddProperty(new MP4Integer16Property("sequenceParameterSetLength"));
  pTable->AddProperty(new MP4BytesProperty("sequenceParameterSetNALUnit"));

  MP4Integer8Property *pCount2 = new MP4Integer8Property("numOfPictureParameterSets");
  AddProperty(pCount2); /* 9 */

  pTable = new SizeTableProperty("pictureEntries", pCount2);
  AddProperty(pTable); /* 10 */
  pTable->AddProperty(new MP4Integer16Property("pictureParameterSetLength"));
  pTable->AddProperty(new MP4BytesProperty("pictureParameterSetNALUnit"));
}

void MP4AvcCAtom::Generate()
{
	MP4Atom::Generate();

	((MP4Integer8Property*)m_pProperties[0])->SetValue(1);

	m_pProperties[4]->SetReadOnly(false);
	((MP4BitfieldProperty*)m_pProperties[4])->SetValue(0x3f);
	m_pProperties[4]->SetReadOnly(true);

	m_pProperties[6]->SetReadOnly(false);
	((MP4BitfieldProperty*)m_pProperties[6])->SetValue(0x7);
	m_pProperties[6]->SetReadOnly(true);
#if 0
	// property reserved4 has non-zero fixed values
	static u_int8_t reserved4[4] = {
		0x00, 0x18, 0xFF, 0xFF, 
	};
	m_pProperties[7]->SetReadOnly(false);
	((MP4BytesProperty*)m_pProperties[7])->
		SetValue(reserved4, sizeof(reserved4));
	m_pProperties[7]->SetReadOnly(true);
#endif
}