2008-04-14 04:09:29 +00:00
|
|
|
|
/*
|
|
|
|
|
* Support for ISO/IEC 14496-3:2001(E) AAC ADTS audio streams.
|
|
|
|
|
*
|
|
|
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
|
|
|
* Version: MPL 1.1
|
|
|
|
|
*
|
|
|
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
|
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
|
|
|
* the License. You may obtain a copy of the License at
|
|
|
|
|
* http://www.mozilla.org/MPL/
|
|
|
|
|
*
|
|
|
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
|
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
|
|
|
* for the specific language governing rights and limitations under the
|
|
|
|
|
* License.
|
|
|
|
|
*
|
|
|
|
|
* The Original Code is the MPEG TS, PS and ES tools.
|
|
|
|
|
*
|
|
|
|
|
* The Initial Developer of the Original Code is Amino Communications Ltd.
|
|
|
|
|
* Portions created by the Initial Developer are Copyright (C) 2008
|
|
|
|
|
* the Initial Developer. All Rights Reserved.
|
|
|
|
|
*
|
|
|
|
|
* Contributor(s):
|
|
|
|
|
* Amino Communications Ltd, Swavesey, Cambridge UK
|
|
|
|
|
*
|
|
|
|
|
* ***** END LICENSE BLOCK *****
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifndef _adts_fns
|
|
|
|
|
#define _adts_fns
|
|
|
|
|
|
|
|
|
|
#include "adts_defns.h"
|
|
|
|
|
#include "audio_fns.h"
|
2008-08-11 22:30:47 +00:00
|
|
|
|
|
|
|
|
|
/* Specify this flag to indicate that there is no emphasis
|
|
|
|
|
* field in the ADTS header. Generally, MPEG-2 ADTS audio
|
|
|
|
|
* (ID=0) has no emphasis field and MPEG-4 (ID=1) has
|
|
|
|
|
* emphasis, but some H.264/AAC streams have
|
|
|
|
|
* MPEG-4 ADTS with no emphasis and in those cases, you'll
|
|
|
|
|
* need this flag.
|
|
|
|
|
*/
|
|
|
|
|
#define ADTS_FLAG_NO_EMPHASIS (1<<0)
|
|
|
|
|
|
|
|
|
|
/* Specify this flag to indicate that there is always an
|
|
|
|
|
* emphasis field, even if the ID says there isn't one -
|
|
|
|
|
* included for symmetry with NO_EMPHASIS.
|
|
|
|
|
*/
|
|
|
|
|
#define ADTS_FLAG_FORCE_EMPHASIS (1<<1)
|
|
|
|
|
|
|
|
|
|
|
2008-04-14 04:09:29 +00:00
|
|
|
|
/*
|
|
|
|
|
* Read the next ADTS frame.
|
|
|
|
|
*
|
|
|
|
|
* Assumes that the input stream is synchronised - i.e., it does not
|
|
|
|
|
* try to cope if the next three bytes are not '1111 1111 1111'.
|
|
|
|
|
*
|
|
|
|
|
* - `file` is the file descriptor of the ADTS file to read from
|
|
|
|
|
* - `frame` is the ADTS frame that is read
|
2008-07-21 21:33:14 +00:00
|
|
|
|
* - `flags` indicates if we are forcing the recognition of "emphasis"
|
|
|
|
|
* fields, etc.
|
2008-04-14 04:09:29 +00:00
|
|
|
|
*
|
|
|
|
|
* Returns 0 if all goes well, EOF if end-of-file is read, and 1 if something
|
|
|
|
|
* goes wrong.
|
|
|
|
|
*/
|
|
|
|
|
extern int read_next_adts_frame(int file,
|
2008-07-21 21:33:14 +00:00
|
|
|
|
audio_frame_p *frame,
|
|
|
|
|
unsigned int flags);
|
2008-04-14 04:09:29 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#endif // _adts_fns
|
2008-06-14 16:05:00 +00:00
|
|
|
|
|
|
|
|
|
// Local Variables:
|
|
|
|
|
// tab-width: 8
|
|
|
|
|
// indent-tabs-mode: nil
|
|
|
|
|
// c-basic-offset: 2
|
|
|
|
|
// End:
|
|
|
|
|
// vim: set tabstop=8 shiftwidth=2 expandtab:
|