mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-11-28 06:30:48 +01:00
125 lines
3.1 KiB
C++
125 lines
3.1 KiB
C++
/*
|
|
* 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"
|
|
|
|
MP4RootAtom::MP4RootAtom()
|
|
: MP4Atom(NULL)
|
|
{
|
|
ExpectChildAtom("moov", Required, OnlyOne);
|
|
ExpectChildAtom("ftyp", Optional, OnlyOne);
|
|
ExpectChildAtom("mdat", Optional, Many);
|
|
ExpectChildAtom("free", Optional, Many);
|
|
ExpectChildAtom("skip", Optional, Many);
|
|
ExpectChildAtom("udta", Optional, Many);
|
|
ExpectChildAtom("moof", Optional, Many);
|
|
}
|
|
|
|
void MP4RootAtom::BeginWrite(bool use64)
|
|
{
|
|
// only call under MP4Create() control
|
|
WriteAtomType("ftyp", OnlyOne);
|
|
|
|
m_pChildAtoms[GetLastMdatIndex()]->BeginWrite(m_pFile->Use64Bits("mdat"));
|
|
}
|
|
|
|
void MP4RootAtom::Write()
|
|
{
|
|
// no-op
|
|
}
|
|
|
|
void MP4RootAtom::FinishWrite(bool use64)
|
|
{
|
|
// finish writing last mdat atom
|
|
u_int32_t mdatIndex = GetLastMdatIndex();
|
|
m_pChildAtoms[mdatIndex]->FinishWrite(m_pFile->Use64Bits("mdat"));
|
|
|
|
// write all atoms after last mdat
|
|
u_int32_t size = m_pChildAtoms.Size();
|
|
for (u_int32_t i = mdatIndex + 1; i < size; i++) {
|
|
m_pChildAtoms[i]->Write();
|
|
}
|
|
}
|
|
|
|
void MP4RootAtom::BeginOptimalWrite()
|
|
{
|
|
WriteAtomType("ftyp", OnlyOne);
|
|
WriteAtomType("moov", OnlyOne);
|
|
WriteAtomType("udta", Many);
|
|
|
|
m_pChildAtoms[GetLastMdatIndex()]->BeginWrite(m_pFile->Use64Bits("mdat"));
|
|
}
|
|
|
|
void MP4RootAtom::FinishOptimalWrite()
|
|
{
|
|
// finish writing mdat
|
|
m_pChildAtoms[GetLastMdatIndex()]->FinishWrite(m_pFile->Use64Bits("mdat"));
|
|
|
|
// find moov atom
|
|
u_int32_t size = m_pChildAtoms.Size();
|
|
MP4Atom* pMoovAtom = NULL;
|
|
|
|
u_int32_t i;
|
|
for (i = 0; i < size; i++) {
|
|
if (!strcmp("moov", m_pChildAtoms[i]->GetType())) {
|
|
pMoovAtom = m_pChildAtoms[i];
|
|
break;
|
|
}
|
|
}
|
|
ASSERT(i < size);
|
|
ASSERT(pMoovAtom != NULL);
|
|
|
|
// rewrite moov so that updated chunkOffsets are written to disk
|
|
m_pFile->SetPosition(pMoovAtom->GetStart());
|
|
u_int64_t oldSize = pMoovAtom->GetSize();
|
|
|
|
pMoovAtom->Write();
|
|
|
|
// sanity check
|
|
u_int64_t newSize = pMoovAtom->GetSize();
|
|
ASSERT(oldSize == newSize);
|
|
}
|
|
|
|
u_int32_t MP4RootAtom::GetLastMdatIndex()
|
|
{
|
|
for (int32_t i = m_pChildAtoms.Size() - 1; i >= 0; i--) {
|
|
if (!strcmp("mdat", m_pChildAtoms[i]->GetType())) {
|
|
return i;
|
|
}
|
|
}
|
|
ASSERT(false);
|
|
return (u_int32_t)-1;
|
|
}
|
|
|
|
void MP4RootAtom::WriteAtomType(const char* type, bool onlyOne)
|
|
{
|
|
u_int32_t size = m_pChildAtoms.Size();
|
|
|
|
for (u_int32_t i = 0; i < size; i++) {
|
|
if (!strcmp(type, m_pChildAtoms[i]->GetType())) {
|
|
m_pChildAtoms[i]->Write();
|
|
if (onlyOne) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|