/* * AC-3 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 AVCODEC_AC3_PARSER_H #define AVCODEC_AC3_PARSER_H #include "ac3.h" #include "get_bits.h" /** * Parse AC-3 frame header. * Parse the header up to the lfeon element, which is the first 52 or 54 bits * depending on the audio coding mode. * @param[in] gbc BitContext containing the first 54 bits of the frame. * @param[out] hdr 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 avpriv_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr); #endif /* AVCODEC_AC3_PARSER_H */