mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
1.7 KiB
47 lines
1.7 KiB
/* |
|
* AC3 parser prototypes |
|
* Copyright (c) 2003 Fabrice Bellard. |
|
* Copyright (c) 2003 Michael Niedermayer. |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#ifndef AC3_PARSER_H |
|
#define AC3_PARSER_H |
|
|
|
#include "ac3.h" |
|
|
|
typedef enum { |
|
AC3_PARSE_ERROR_SYNC = -1, |
|
AC3_PARSE_ERROR_BSID = -2, |
|
AC3_PARSE_ERROR_SAMPLE_RATE = -3, |
|
AC3_PARSE_ERROR_FRAME_SIZE = -4, |
|
} AC3ParseError; |
|
|
|
/** |
|
* Parses AC-3 frame header. |
|
* Parses the header up to the lfeon element, which is the first 52 or 54 bits |
|
* depending on the audio coding mode. |
|
* @param buf[in] Array containing the first 7 bytes of the frame. |
|
* @param hdr[out] Pointer to struct where header info is written. |
|
* @return Returns 0 on success, -1 if there is a sync word mismatch, |
|
* -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate) |
|
* element is invalid, or -4 if the frmsizecod (bit rate) element is invalid. |
|
*/ |
|
int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr); |
|
|
|
#endif /* AC3_PARSER_H */
|
|
|