mirror of
https://github.com/axiomatic-systems/Bento4.git
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121 lines
4.4 KiB
C++
121 lines
4.4 KiB
C++
/*****************************************************************
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| AP4 - pdin Atoms
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| Copyright 2002-2011 Axiomatic Systems, LLC
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| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
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| Unless you have obtained Bento4 under a difference license,
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| this version of Bento4 is Bento4|GPL.
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| Bento4|GPL is free software; you can redistribute it and/or modify
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| it under the terms of the GNU General Public License as published by
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| the Free Software Foundation; either version 2, or (at your option)
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| any later version.
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| Bento4|GPL is distributed in the hope that it will be useful,
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| but WITHOUT ANY WARRANTY; without even the implied warranty of
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| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| GNU General Public License for more details.
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| You should have received a copy of the GNU General Public License
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| along with Bento4|GPL; see the file COPYING. If not, write to the
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| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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| 02111-1307, USA.
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****************************************************************/
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/*----------------------------------------------------------------------
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| includes
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+---------------------------------------------------------------------*/
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#include "Ap4PdinAtom.h"
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#include "Ap4Utils.h"
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/*----------------------------------------------------------------------
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| AP4_PdinAtom::Create
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+---------------------------------------------------------------------*/
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AP4_PdinAtom*
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AP4_PdinAtom::Create(AP4_Size size, AP4_ByteStream& stream)
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{
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AP4_UI08 version;
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AP4_UI32 flags;
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if (size < AP4_FULL_ATOM_HEADER_SIZE) return NULL;
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if (AP4_FAILED(AP4_Atom::ReadFullHeader(stream, version, flags))) return NULL;
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if (version > 1) return NULL;
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return new AP4_PdinAtom(size, version, flags, stream);
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}
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/*----------------------------------------------------------------------
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| AP4_PdinAtom::AP4_PdinAtom
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+---------------------------------------------------------------------*/
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AP4_PdinAtom::AP4_PdinAtom() :
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AP4_Atom(AP4_ATOM_TYPE_PDIN, AP4_FULL_ATOM_HEADER_SIZE, 0, 0)
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{
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}
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/*----------------------------------------------------------------------
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| AP4_PdinAtom::AddEntry
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_PdinAtom::AddEntry(AP4_UI32 rate, AP4_UI32 initial_delay)
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{
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Entry entry;
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entry.m_Rate = rate;
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entry.m_InitialDelay = initial_delay;
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m_Entries.Append(entry);
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SetSize(AP4_FULL_ATOM_HEADER_SIZE+m_Entries.ItemCount()*8);
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_PdinAtom::AP4_PdinAtom
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+---------------------------------------------------------------------*/
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AP4_PdinAtom::AP4_PdinAtom(AP4_UI32 size,
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AP4_UI08 version,
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AP4_UI32 flags,
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AP4_ByteStream& stream) :
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AP4_Atom(AP4_ATOM_TYPE_PDIN, size, version, flags)
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{
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AP4_UI32 entry_count = (size-AP4_FULL_ATOM_HEADER_SIZE)/8;
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m_Entries.SetItemCount(entry_count);
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for (unsigned int i=0; i<entry_count; i++) {
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stream.ReadUI32(m_Entries[i].m_Rate);
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stream.ReadUI32(m_Entries[i].m_InitialDelay);
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}
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}
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/*----------------------------------------------------------------------
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| AP4_PdinAtom::WriteFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_PdinAtom::WriteFields(AP4_ByteStream& stream)
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{
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AP4_Result result;
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for (unsigned int i=0; i<m_Entries.ItemCount(); i++) {
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result = stream.WriteUI32(m_Entries[i].m_Rate);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32(m_Entries[i].m_InitialDelay);
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if (AP4_FAILED(result)) return result;
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}
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_PdinAtom::InspectFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_PdinAtom::InspectFields(AP4_AtomInspector& inspector)
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{
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char header[32];
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for (AP4_Ordinal i=0; i<m_Entries.ItemCount(); i++) {
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AP4_FormatString(header, sizeof(header), "rate(%d)", i);
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inspector.AddField(header, m_Entries[i].m_Rate);
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AP4_FormatString(header, sizeof(header), "initial_delay(%d)", i);
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inspector.AddField(header, m_Entries[i].m_InitialDelay);
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}
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return AP4_SUCCESS;
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}
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