mirror of
https://github.com/axiomatic-systems/Bento4.git
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216 lines
8.5 KiB
C++
216 lines
8.5 KiB
C++
/*****************************************************************
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| AP4 - ohdr Atoms
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| Copyright 2002-2008 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 "Ap4Utils.h"
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#include "Ap4OhdrAtom.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_OhdrAtom)
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/*----------------------------------------------------------------------
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| AP4_OhdrAtom::Create
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+---------------------------------------------------------------------*/
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AP4_OhdrAtom*
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AP4_OhdrAtom::Create(AP4_Size size,
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AP4_ByteStream& stream,
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AP4_AtomFactory& atom_factory)
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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_OhdrAtom(size, version, flags, stream, atom_factory);
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}
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/*----------------------------------------------------------------------
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| AP4_OhdrAtom::AP4_OhdrAtom
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+---------------------------------------------------------------------*/
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AP4_OhdrAtom::AP4_OhdrAtom(AP4_UI08 encryption_method,
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AP4_UI08 padding_scheme,
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AP4_UI64 plaintext_length,
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const char* content_id,
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const char* rights_issuer_url,
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const AP4_Byte* textual_headers,
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AP4_Size textual_headers_size) :
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AP4_ContainerAtom(AP4_ATOM_TYPE_OHDR, (AP4_UI32)0, (AP4_UI32)0),
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m_EncryptionMethod(encryption_method),
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m_PaddingScheme(padding_scheme),
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m_PlaintextLength(plaintext_length),
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m_ContentId(content_id),
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m_RightsIssuerUrl(rights_issuer_url),
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m_TextualHeaders(textual_headers, textual_headers_size)
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{
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m_Size32 += 1+1+8+2+2+2+m_ContentId.GetLength()+m_RightsIssuerUrl.GetLength()+textual_headers_size;
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}
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/*----------------------------------------------------------------------
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| AP4_OhdrAtom::AP4_OhdrAtom
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+---------------------------------------------------------------------*/
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AP4_OhdrAtom::AP4_OhdrAtom(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_AtomFactory& atom_factory) :
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AP4_ContainerAtom(AP4_ATOM_TYPE_OHDR, size, false, version, flags)
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{
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// encryption method
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stream.ReadUI08(m_EncryptionMethod);
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// padding scheme
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stream.ReadUI08(m_PaddingScheme);
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// plaintext length
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stream.ReadUI64(m_PlaintextLength);
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// string lengths
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AP4_UI16 content_id_length;
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AP4_UI16 rights_issuer_url_length;
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AP4_UI16 textual_headers_length;
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stream.ReadUI16(content_id_length);
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stream.ReadUI16(rights_issuer_url_length);
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stream.ReadUI16(textual_headers_length);
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// content id
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char* buffer = new char[content_id_length];
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stream.Read(buffer, content_id_length);
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m_ContentId.Assign(buffer, content_id_length);
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delete[] buffer;
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// rights issuer url
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buffer = new char[rights_issuer_url_length];
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stream.Read(buffer, rights_issuer_url_length);
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m_RightsIssuerUrl.Assign(buffer, rights_issuer_url_length);
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delete[] buffer;
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// textual headers
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buffer = new char[textual_headers_length];
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stream.Read(buffer, textual_headers_length);
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m_TextualHeaders.SetData((AP4_Byte*)buffer, textual_headers_length);
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delete[] buffer;
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// read the children
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AP4_Size bytes_used = AP4_FULL_ATOM_HEADER_SIZE+1+1+8+2+2+2+content_id_length+rights_issuer_url_length+textual_headers_length;
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if (bytes_used <= size) {
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ReadChildren(atom_factory, stream, size-bytes_used);
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}
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}
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/*----------------------------------------------------------------------
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| AP4_OhdrAtom::WriteFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_OhdrAtom::WriteFields(AP4_ByteStream& stream)
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{
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AP4_CHECK(stream.WriteUI08(m_EncryptionMethod));
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AP4_CHECK(stream.WriteUI08(m_PaddingScheme));
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AP4_CHECK(stream.WriteUI64(m_PlaintextLength));
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AP4_CHECK(stream.WriteUI16((AP4_UI16)m_ContentId.GetLength()));
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AP4_CHECK(stream.WriteUI16((AP4_UI16)m_RightsIssuerUrl.GetLength()));
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AP4_CHECK(stream.WriteUI16((AP4_UI16)m_TextualHeaders.GetDataSize()));
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AP4_CHECK(stream.Write(m_ContentId.GetChars(), m_ContentId.GetLength()));
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AP4_CHECK(stream.Write(m_RightsIssuerUrl.GetChars(), m_RightsIssuerUrl.GetLength()));
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AP4_CHECK(stream.Write(m_TextualHeaders.GetData(), m_TextualHeaders.GetDataSize()));
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// write the children
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return m_Children.Apply(AP4_AtomListWriter(stream));
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}
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/*----------------------------------------------------------------------
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| AP4_OhdrAtom::InspectFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_OhdrAtom::InspectFields(AP4_AtomInspector& inspector)
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{
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inspector.AddField("encryption_method", m_EncryptionMethod);
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inspector.AddField("padding_scheme", m_PaddingScheme);
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inspector.AddField("plaintext_length", (AP4_UI32)m_PlaintextLength);
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inspector.AddField("content_id", m_ContentId.GetChars());
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inspector.AddField("rights_issuer_url", m_RightsIssuerUrl.GetChars());
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{
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AP4_DataBuffer output_buffer;
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AP4_Result result;
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result = output_buffer.Reserve(1+m_TextualHeaders.GetDataSize());
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if (AP4_FAILED(result)) {
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inspector.AddField("textual_headers",
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m_TextualHeaders.UseData(),
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m_TextualHeaders.GetDataSize(),
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AP4_AtomInspector::HINT_HEX);
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} else {
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AP4_Size data_len = m_TextualHeaders.GetDataSize();
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AP4_Byte* textual_headers_string;
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AP4_Byte* curr;
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output_buffer.SetData((const AP4_Byte*)m_TextualHeaders.GetData(), m_TextualHeaders.GetDataSize());
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curr = textual_headers_string = output_buffer.UseData();
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textual_headers_string[m_TextualHeaders.GetDataSize()] = '\0';
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while(curr < textual_headers_string+data_len) {
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if ('\0' == *curr) {
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*curr = '\n';
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}
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curr++;
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}
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inspector.AddField("textual_headers", (const char*) textual_headers_string);
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}
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}
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return InspectChildren(inspector);
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}
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/*----------------------------------------------------------------------
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| AP4_OhdrAtom::Clone
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+---------------------------------------------------------------------*/
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AP4_Atom*
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AP4_OhdrAtom::Clone()
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{
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AP4_OhdrAtom* clone;
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clone = new AP4_OhdrAtom(m_EncryptionMethod,
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m_PaddingScheme,
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m_PlaintextLength,
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m_ContentId.GetChars(),
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m_RightsIssuerUrl.GetChars(),
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m_TextualHeaders.GetData(),
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m_TextualHeaders.GetDataSize());
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AP4_List<AP4_Atom>::Item* child_item = m_Children.FirstItem();
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while (child_item) {
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AP4_Atom* child_clone = child_item->GetData()->Clone();
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if (child_clone) clone->AddChild(child_clone);
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child_item = child_item->GetNext();
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}
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return clone;
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}
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