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79 lines
2 KiB
C++
79 lines
2 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is MPEG4IP.
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*
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* The Initial Developer of the Original Code is Cisco Systems Inc.
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* Portions created by Cisco Systems Inc. are
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* Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
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*
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* Contributor(s):
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* Dave Mackie dmackie@cisco.com
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*/
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#include "mp4common.h"
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MP4TrunAtom::MP4TrunAtom()
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: MP4Atom("trun")
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{
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AddVersionAndFlags(); /* 0, 1 */
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AddProperty( /* 2 */
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new MP4Integer32Property("sampleCount"));
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}
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void MP4TrunAtom::AddProperties(u_int32_t flags)
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{
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if (flags & 0x01) {
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// Note this is a signed 32 value
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AddProperty(
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new MP4Integer32Property("dataOffset"));
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}
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if (flags & 0x04) {
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AddProperty(
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new MP4Integer32Property("firstSampleFlags"));
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}
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MP4TableProperty* pTable =
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new MP4TableProperty("samples",
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(MP4Integer32Property *)m_pProperties[2]);
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AddProperty(pTable);
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if (flags & 0x100) {
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pTable->AddProperty(
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new MP4Integer32Property("sampleDuration"));
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}
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if (flags & 0x200) {
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pTable->AddProperty(
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new MP4Integer32Property("sampleSize"));
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}
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if (flags & 0x400) {
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pTable->AddProperty(
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new MP4Integer32Property("sampleFlags"));
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}
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if (flags & 0x800) {
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pTable->AddProperty(
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new MP4Integer32Property("sampleCompositionTimeOffset"));
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}
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}
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void MP4TrunAtom::Read()
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{
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/* read atom version, flags, and sampleCount */
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ReadProperties(0, 3);
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/* need to create the properties based on the atom flags */
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AddProperties(GetFlags());
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/* now we can read the remaining properties */
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ReadProperties(3);
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Skip(); // to end of atom
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}
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