kopia lustrzana https://github.com/F5OEO/tstools
78 wiersze
2.3 KiB
C
78 wiersze
2.3 KiB
C
/*
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* Support for ISO/IEC 14496-3:2001(E) AAC ADTS audio streams.
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the MPEG TS, PS and ES tools.
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*
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* The Initial Developer of the Original Code is Amino Communications Ltd.
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Amino Communications Ltd, Swavesey, Cambridge UK
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*
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* ***** END LICENSE BLOCK *****
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*/
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#ifndef _adts_fns
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#define _adts_fns
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#include "adts_defns.h"
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#include "audio_fns.h"
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/* Specify this flag to indicate that there is no emphasis
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* field in the ADTS header. Generally, MPEG-2 ADTS audio
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* (ID=0) has no emphasis field and MPEG-4 (ID=1) has
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* emphasis, but some H.264/AAC streams have
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* MPEG-4 ADTS with no emphasis and in those cases, you'll
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* need this flag.
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*/
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#define ADTS_FLAG_NO_EMPHASIS (1<<0)
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/* Specify this flag to indicate that there is always an
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* emphasis field, even if the ID says there isn't one -
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* included for symmetry with NO_EMPHASIS.
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*/
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#define ADTS_FLAG_FORCE_EMPHASIS (1<<1)
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/*
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* Read the next ADTS frame.
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*
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* Assumes that the input stream is synchronised - i.e., it does not
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* try to cope if the next three bytes are not '1111 1111 1111'.
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*
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* - `file` is the file descriptor of the ADTS file to read from
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* - `frame` is the ADTS frame that is read
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* - `flags` indicates if we are forcing the recognition of "emphasis"
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* fields, etc.
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*
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* Returns 0 if all goes well, EOF if end-of-file is read, and 1 if something
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* goes wrong.
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*/
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extern int read_next_adts_frame(int file,
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audio_frame_p *frame,
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unsigned int flags);
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#endif // _adts_fns
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// Local Variables:
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// tab-width: 8
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// indent-tabs-mode: nil
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// c-basic-offset: 2
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// End:
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// vim: set tabstop=8 shiftwidth=2 expandtab:
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