mirror of
https://github.com/axiomatic-systems/Bento4.git
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126 lines
4.9 KiB
C++
126 lines
4.9 KiB
C++
/*****************************************************************
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| AP4 - tenc Atoms
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| Copyright 2002-2016 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 "Ap4TencAtom.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_TencAtom)
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/*----------------------------------------------------------------------
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| AP4_TencAtom::Create
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+---------------------------------------------------------------------*/
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AP4_TencAtom*
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AP4_TencAtom::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(ReadFullHeader(stream, version, flags))) return NULL;
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if (version > 1) return NULL;
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AP4_TencAtom* tenc = new AP4_TencAtom(size, version, flags);
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if (tenc == NULL) return NULL;
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AP4_Result result = tenc->Parse(stream);
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if (AP4_FAILED(result)) {
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delete tenc;
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return NULL;
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}
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return tenc;
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}
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/*----------------------------------------------------------------------
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| AP4_TencAtom::AP4_TencAtom
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+---------------------------------------------------------------------*/
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AP4_TencAtom::AP4_TencAtom(AP4_UI32 default_is_protected,
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AP4_UI08 default_per_sample_iv_size,
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const AP4_UI08* default_kid) :
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AP4_Atom(AP4_ATOM_TYPE_TENC, AP4_FULL_ATOM_HEADER_SIZE+20, 0, 0),
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AP4_CencTrackEncryption(0,
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default_is_protected,
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default_per_sample_iv_size,
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default_kid)
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{
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}
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/*----------------------------------------------------------------------
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| AP4_TencAtom::AP4_TencAtom
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+---------------------------------------------------------------------*/
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AP4_TencAtom::AP4_TencAtom(AP4_UI32 default_is_protected,
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AP4_UI08 default_per_sample_iv_size,
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const AP4_UI08* default_kid,
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AP4_UI08 default_constant_iv_size,
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const AP4_UI08* default_constant_iv,
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AP4_UI08 default_crypt_byte_block,
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AP4_UI08 default_skip_byte_block) :
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AP4_Atom(AP4_ATOM_TYPE_TENC, AP4_FULL_ATOM_HEADER_SIZE+20+(default_per_sample_iv_size?0:1+default_constant_iv_size), 1, 0),
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AP4_CencTrackEncryption(1,
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default_is_protected,
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default_per_sample_iv_size,
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default_kid,
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default_constant_iv_size,
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default_constant_iv,
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default_crypt_byte_block,
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default_skip_byte_block)
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{
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}
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/*----------------------------------------------------------------------
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| AP4_TencAtom::Create
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+---------------------------------------------------------------------*/
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AP4_TencAtom::AP4_TencAtom(AP4_UI32 size,
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AP4_UI08 version,
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AP4_UI32 flags) :
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AP4_Atom(AP4_ATOM_TYPE_TENC, size, version, flags),
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AP4_CencTrackEncryption(version)
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{
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}
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/*----------------------------------------------------------------------
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| AP4_TencAtom::WriteFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_TencAtom::WriteFields(AP4_ByteStream& stream)
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{
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return DoWriteFields(stream);
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}
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/*----------------------------------------------------------------------
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| AP4_TencAtom::InspectFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_TencAtom::InspectFields(AP4_AtomInspector& inspector)
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{
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return DoInspectFields(inspector);
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}
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