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/*
* 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]
*/
#include "src/impl.h"
namespace mp4v2 {
namespace impl {
///////////////////////////////////////////////////////////////////////////////
MP4RtpAtom::MP4RtpAtom(MP4File &file)
: MP4Atom(file, "rtp ")
{
// The atom type "rtp " is used in two complete unrelated ways
// i.e. it's real two atoms with the same name
// To handle that we need to postpone property creation until
// we know who our parent atom is (stsd or hnti) which gives us
// the context info we need to know who we are
}
void MP4RtpAtom::AddPropertiesStsdType()
{
AddReserved(*this, "reserved1", 6); /* 0 */
AddProperty( /* 1 */
new MP4Integer16Property(*this, "dataReferenceIndex"));
AddProperty( /* 2 */
new MP4Integer16Property(*this, "hintTrackVersion"));
AddProperty( /* 3 */
new MP4Integer16Property(*this, "highestCompatibleVersion"));
AddProperty( /* 4 */
new MP4Integer32Property(*this, "maxPacketSize"));
ExpectChildAtom("tims", Required, OnlyOne);
ExpectChildAtom("tsro", Optional, OnlyOne);
ExpectChildAtom("snro", Optional, OnlyOne);
}
void MP4RtpAtom::AddPropertiesHntiType()
{
MP4StringProperty* pProp =
new MP4StringProperty(*this, "descriptionFormat");
pProp->SetFixedLength(4);
AddProperty(pProp); /* 0 */
AddProperty( /* 1 */
new MP4StringProperty(*this, "sdpText"));
}
void MP4RtpAtom::Generate()
{
ASSERT(m_pParentAtom);
if (!strcmp(m_pParentAtom->GetType(), "stsd")) {
AddPropertiesStsdType();
GenerateStsdType();
} else if (!strcmp(m_pParentAtom->GetType(), "hnti")) {
AddPropertiesHntiType();
GenerateHntiType();
} else {
log.warningf("%s: \"%s\": rtp atom in unexpected context, can not generate",
__FUNCTION__, GetFile().GetFilename().c_str() );
}
}
void MP4RtpAtom::GenerateStsdType()
{
// generate children
MP4Atom::Generate();
((MP4Integer16Property*)m_pProperties[1])->SetValue(1);
((MP4Integer16Property*)m_pProperties[2])->SetValue(1);
((MP4Integer16Property*)m_pProperties[3])->SetValue(1);
}
void MP4RtpAtom::GenerateHntiType()
{
MP4Atom::Generate();
((MP4StringProperty*)m_pProperties[0])->SetValue("sdp ");
}
void MP4RtpAtom::Read()
{
ASSERT(m_pParentAtom);
if (!strcmp(m_pParentAtom->GetType(), "stsd")) {
AddPropertiesStsdType();
ReadStsdType();
} else if (!strcmp(m_pParentAtom->GetType(), "hnti")) {
AddPropertiesHntiType();
ReadHntiType();
} else {
log.verbose1f("rtp atom in unexpected context, can not read");
}
Skip(); // to end of atom
}
void MP4RtpAtom::ReadStsdType()
{
MP4Atom::Read();
}
void MP4RtpAtom::ReadHntiType()
{
ReadProperties(0, 1);
// read sdp string, length is implicit in size of atom
uint64_t size = GetEnd() - m_File.GetPosition();
char* data = (char*)MP4Malloc(size + 1);
ASSERT(data != NULL);
m_File.ReadBytes((uint8_t*)data, size);
data[size] = '\0';
((MP4StringProperty*)m_pProperties[1])->SetValue(data);
MP4Free(data);
}
void MP4RtpAtom::Write()
{
if (!strcmp(m_pParentAtom->GetType(), "hnti")) {
WriteHntiType();
} else {
MP4Atom::Write();
}
}
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((uint32_t)strlen(pSdp->GetValue()));
MP4Atom::Write();
pSdp->SetFixedLength(0);
}
///////////////////////////////////////////////////////////////////////////////
}
} // namespace mp4v2::impl
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