PeerStreamer

/*

 * 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 FFMPEG_AC3_PARSER_H

#define FFMPEG_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 /* FFMPEG_AC3_PARSER_H */