diff options
Diffstat (limited to 'libavcodec/ac3_parser_internal.h')
-rw-r--r-- | libavcodec/ac3_parser_internal.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/libavcodec/ac3_parser_internal.h b/libavcodec/ac3_parser_internal.h new file mode 100644 index 0000000000..3648802a73 --- /dev/null +++ b/libavcodec/ac3_parser_internal.h @@ -0,0 +1,42 @@ +/* + * AC-3 parser internal code + * + * 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_INTERNAL_H +#define AVCODEC_AC3_PARSER_INTERNAL_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 ff_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr); + +int avpriv_ac3_parse_header(AC3HeaderInfo **hdr, const uint8_t *buf, + size_t size); + +#endif /* AVCODEC_AC3_PARSER_INTERNAL_H */ |