mirror of
https://github.com/axiomatic-systems/Bento4.git
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234 lines
8.0 KiB
C++
234 lines
8.0 KiB
C++
/*****************************************************************
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| AP4 - saiz 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 "Ap4Atom.h"
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#include "Ap4SaizAtom.h"
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#include "Ap4Utils.h"
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/*----------------------------------------------------------------------
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| dynamic cast support
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+---------------------------------------------------------------------*/
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AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_SaizAtom)
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::Create
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+---------------------------------------------------------------------*/
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AP4_SaizAtom*
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AP4_SaizAtom::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 > 0) return NULL;
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return new AP4_SaizAtom(size, version, flags, stream);
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}
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::AP4_SaizAtom
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+---------------------------------------------------------------------*/
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AP4_SaizAtom::AP4_SaizAtom() :
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AP4_Atom(AP4_ATOM_TYPE_SAIZ, AP4_FULL_ATOM_HEADER_SIZE+1+4, 0, 0),
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m_AuxInfoType(0),
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m_AuxInfoTypeParameter(0),
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m_DefaultSampleInfoSize(0),
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m_SampleCount(0)
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{
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}
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::AP4_SaizAtom
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+---------------------------------------------------------------------*/
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AP4_SaizAtom::AP4_SaizAtom(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_SAIZ, size, version, flags),
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m_AuxInfoType(0),
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m_AuxInfoTypeParameter(0)
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{
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AP4_UI32 remains = size-GetHeaderSize();
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if (flags & 1) {
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stream.ReadUI32(m_AuxInfoType);
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stream.ReadUI32(m_AuxInfoTypeParameter);
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remains -= 8;
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}
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stream.ReadUI08(m_DefaultSampleInfoSize);
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stream.ReadUI32(m_SampleCount);
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remains -= 5;
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if (m_DefaultSampleInfoSize == 0) {
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// means that the sample info entries have different sizes
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if (m_SampleCount > remains) m_SampleCount = remains; // sanity check
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AP4_Cardinal sample_count = m_SampleCount;
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m_Entries.SetItemCount(sample_count);
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unsigned char* buffer = new AP4_UI08[sample_count];
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AP4_Result result = stream.Read(buffer, sample_count);
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if (AP4_FAILED(result)) {
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delete[] buffer;
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return;
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}
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for (unsigned int i=0; i<sample_count; i++) {
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m_Entries[i] = buffer[i];
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}
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delete[] buffer;
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}
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}
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::SetSampleCount
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_SaizAtom::SetSampleCount(AP4_UI32 sample_count)
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{
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m_SampleCount = sample_count;
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unsigned int extra = (m_Flags&1)?8:0;
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if (m_DefaultSampleInfoSize == 0) {
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if (sample_count) {
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m_Entries.SetItemCount(sample_count);
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} else {
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m_Entries.Clear();
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}
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SetSize(AP4_FULL_ATOM_HEADER_SIZE+extra+1+4+sample_count);
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} else {
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SetSize(AP4_FULL_ATOM_HEADER_SIZE+extra+1+4);
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}
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::SetDefaultSampleInfoSize
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_SaizAtom::SetDefaultSampleInfoSize(AP4_UI08 sample_info_size)
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{
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m_DefaultSampleInfoSize = sample_info_size;
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m_Entries.Clear();
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unsigned int extra = (m_Flags&1)?8:0;
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SetSize(AP4_FULL_ATOM_HEADER_SIZE+extra+1+4);
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::GetSampleInfoSize
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_SaizAtom::GetSampleInfoSize(AP4_Ordinal sample, AP4_UI08& sample_info_size)
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{
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if (m_DefaultSampleInfoSize) {
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sample_info_size = m_DefaultSampleInfoSize;
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} else {
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// check the sample index
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if (sample >= m_SampleCount) {
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sample_info_size = 0;
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return AP4_ERROR_OUT_OF_RANGE;
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} else {
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sample_info_size = m_Entries[sample];
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}
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}
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::SetSampleInfoSize
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_SaizAtom::SetSampleInfoSize(AP4_Ordinal sample, AP4_UI08 sample_info_size)
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{
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// check the sample index
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if (sample >= m_SampleCount) {
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return AP4_ERROR_OUT_OF_RANGE;
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} else {
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if (m_DefaultSampleInfoSize) {
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if (m_DefaultSampleInfoSize != sample_info_size) {
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return AP4_ERROR_INVALID_STATE;
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}
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} else {
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m_Entries[sample] = sample_info_size;
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}
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return AP4_SUCCESS;
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}
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}
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::WriteFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_SaizAtom::WriteFields(AP4_ByteStream& stream)
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{
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AP4_Result result;
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if (m_Flags&1) {
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result = stream.WriteUI32(m_AuxInfoType);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32(m_AuxInfoTypeParameter);
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if (AP4_FAILED(result)) return result;
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}
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result = stream.WriteUI08(m_DefaultSampleInfoSize);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32(m_SampleCount);
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if (AP4_FAILED(result)) return result;
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if (m_DefaultSampleInfoSize == 0) {
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for (AP4_UI32 i=0; i<m_SampleCount; i++) {
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result = stream.WriteUI08(m_Entries[i]);
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if (AP4_FAILED(result)) return result;
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}
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}
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_SaizAtom::InspectFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_SaizAtom::InspectFields(AP4_AtomInspector& inspector)
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{
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if (m_Flags&1) {
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inspector.AddField("aux info type", m_AuxInfoType, AP4_AtomInspector::HINT_HEX);
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inspector.AddField("aux info type parameter", m_AuxInfoTypeParameter, AP4_AtomInspector::HINT_HEX);
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}
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inspector.AddField("default sample info size", m_DefaultSampleInfoSize);
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inspector.AddField("sample count", m_SampleCount);
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if (inspector.GetVerbosity() >= 2) {
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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), "entry %8d", i);
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inspector.AddField(header, m_Entries[i]);
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}
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}
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return AP4_SUCCESS;
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}
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