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/*
* Support for MPEG layer 2 audio streams.
*
* (actually, support for
*
* - MPEG-1 audio (described in ISO/IEC 11172-3), layers 1..3
* - MPEG-2 audio (described in ISO/IEC 13818-3), layer 2
* - unofficial MPEG-2.5
*
* but MPEG-2 layer 2 is the main target)
*
* ***** 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 _l2audio_fns
#define _l2audio_fns
#include "audio_defns.h"
/*
* Tidy up and free an audio frame datastructure when we've finished with it
*
* Empties the datastructure, frees it, and sets `frame` to NULL.
*
* If `frame` is already NULL, does nothing.
*/
extern void free_audio_frame(audio_frame_p *frame);
/*
* Read the next audio 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 audio file to read from
* - `frame` is the audio frame that is read
*
* Returns 0 if all goes well, EOF if end-of-file is read, and 1 if something
* goes wrong.
*/
extern int read_next_l2audio_frame(int file,
audio_frame_p *frame);
#endif // _l2audio_fns
// Local Variables:
// tab-width: 8
// indent-tabs-mode: nil
// c-basic-offset: 2
// End:
// vim: set tabstop=8 shiftwidth=2 expandtab:
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