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|
/*****************************************************************
|
| AP4 - saiz Atoms
|
| Copyright 2002-2011 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4Atom.h"
#include "Ap4SaizAtom.h"
#include "Ap4Utils.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_SaizAtom)
/*----------------------------------------------------------------------
| AP4_SaizAtom::Create
+---------------------------------------------------------------------*/
AP4_SaizAtom*
AP4_SaizAtom::Create(AP4_Size size, AP4_ByteStream& stream)
{
AP4_UI08 version;
AP4_UI32 flags;
if (AP4_FAILED(AP4_Atom::ReadFullHeader(stream, version, flags))) return NULL;
if (version > 0) return NULL;
return new AP4_SaizAtom(size, version, flags, stream);
}
/*----------------------------------------------------------------------
| AP4_SaizAtom::AP4_SaizAtom
+---------------------------------------------------------------------*/
AP4_SaizAtom::AP4_SaizAtom() :
AP4_Atom(AP4_ATOM_TYPE_SAIZ, AP4_FULL_ATOM_HEADER_SIZE+1+4, 0, 0),
m_AuxInfoType(0),
m_AuxInfoTypeParameter(0),
m_DefaultSampleInfoSize(0),
m_SampleCount(0)
{
}
/*----------------------------------------------------------------------
| AP4_SaizAtom::AP4_SaizAtom
+---------------------------------------------------------------------*/
AP4_SaizAtom::AP4_SaizAtom(AP4_UI32 size,
AP4_UI08 version,
AP4_UI32 flags,
AP4_ByteStream& stream) :
AP4_Atom(AP4_ATOM_TYPE_SAIZ, size, version, flags),
m_AuxInfoType(0),
m_AuxInfoTypeParameter(0)
{
AP4_UI32 remains = size-GetHeaderSize();
if (flags & 1) {
stream.ReadUI32(m_AuxInfoType);
stream.ReadUI32(m_AuxInfoTypeParameter);
remains -= 8;
}
stream.ReadUI08(m_DefaultSampleInfoSize);
stream.ReadUI32(m_SampleCount);
remains -= 5;
if (m_DefaultSampleInfoSize == 0) {
// means that the sample info entries have different sizes
if (m_SampleCount > remains) m_SampleCount = remains; // sanity check
AP4_Cardinal sample_count = m_SampleCount;
m_Entries.SetItemCount(sample_count);
unsigned char* buffer = new AP4_UI08[sample_count];
AP4_Result result = stream.Read(buffer, sample_count);
if (AP4_FAILED(result)) {
delete[] buffer;
return;
}
for (unsigned int i=0; i<sample_count; i++) {
m_Entries[i] = buffer[i];
}
delete[] buffer;
}
}
/*----------------------------------------------------------------------
| AP4_SaizAtom::SetSampleCount
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaizAtom::SetSampleCount(AP4_UI32 sample_count)
{
m_SampleCount = sample_count;
unsigned int extra = (m_Flags&1)?8:0;
if (m_DefaultSampleInfoSize == 0) {
if (sample_count) {
m_Entries.SetItemCount(sample_count);
} else {
m_Entries.Clear();
}
SetSize(AP4_FULL_ATOM_HEADER_SIZE+extra+1+4+sample_count);
} else {
SetSize(AP4_FULL_ATOM_HEADER_SIZE+extra+1+4);
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_SaizAtom::SetDefaultSampleInfoSize
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaizAtom::SetDefaultSampleInfoSize(AP4_UI08 sample_info_size)
{
m_DefaultSampleInfoSize = sample_info_size;
m_Entries.Clear();
unsigned int extra = (m_Flags&1)?8:0;
SetSize(AP4_FULL_ATOM_HEADER_SIZE+extra+1+4);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_SaizAtom::GetSampleInfoSize
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaizAtom::GetSampleInfoSize(AP4_Ordinal sample, AP4_UI08& sample_info_size)
{
if (m_DefaultSampleInfoSize) {
sample_info_size = m_DefaultSampleInfoSize;
} else {
// check the sample index
if (sample >= m_SampleCount) {
sample_info_size = 0;
return AP4_ERROR_OUT_OF_RANGE;
} else {
sample_info_size = m_Entries[sample];
}
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_SaizAtom::SetSampleInfoSize
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaizAtom::SetSampleInfoSize(AP4_Ordinal sample, AP4_UI08 sample_info_size)
{
// check the sample index
if (sample >= m_SampleCount) {
return AP4_ERROR_OUT_OF_RANGE;
} else {
if (m_DefaultSampleInfoSize) {
if (m_DefaultSampleInfoSize != sample_info_size) {
return AP4_ERROR_INVALID_STATE;
}
} else {
m_Entries[sample] = sample_info_size;
}
return AP4_SUCCESS;
}
}
/*----------------------------------------------------------------------
| AP4_SaizAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaizAtom::WriteFields(AP4_ByteStream& stream)
{
AP4_Result result;
if (m_Flags&1) {
result = stream.WriteUI32(m_AuxInfoType);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_AuxInfoTypeParameter);
if (AP4_FAILED(result)) return result;
}
result = stream.WriteUI08(m_DefaultSampleInfoSize);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_SampleCount);
if (AP4_FAILED(result)) return result;
if (m_DefaultSampleInfoSize == 0) {
for (AP4_UI32 i=0; i<m_SampleCount; i++) {
result = stream.WriteUI08(m_Entries[i]);
if (AP4_FAILED(result)) return result;
}
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_SaizAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaizAtom::InspectFields(AP4_AtomInspector& inspector)
{
if (m_Flags&1) {
inspector.AddField("aux info type", m_AuxInfoType, AP4_AtomInspector::HINT_HEX);
inspector.AddField("aux info type parameter", m_AuxInfoTypeParameter, AP4_AtomInspector::HINT_HEX);
}
inspector.AddField("default sample info size", m_DefaultSampleInfoSize);
inspector.AddField("sample count", m_SampleCount);
if (inspector.GetVerbosity() >= 2) {
char header[32];
for (AP4_Ordinal i=0; i<m_Entries.ItemCount(); i++) {
AP4_FormatString(header, sizeof(header), "entry %8d", i);
inspector.AddField(header, m_Entries[i]);
}
}
return AP4_SUCCESS;
}
|
