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author | Anton Khirnov <anton@khirnov.net> | 2017-03-30 16:56:28 +0200 |
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committer | Diego Biurrun <diego@biurrun.de> | 2017-04-12 15:39:00 +0200 |
commit | 50a1c66cf6ab7eb683daaa9e2da3869fa3a54609 (patch) | |
tree | 4c967343ff0b2f0e6d61eb22b8782138c937bf8f /libavcodec/ac3_parser_internal.h | |
parent | 193b09189004ede4a6998e69192d1a9f63602088 (diff) | |
download | ffmpeg-50a1c66cf6ab7eb683daaa9e2da3869fa3a54609.tar.gz |
ac3_parser: add a public function for parsing the data required by the demuxer
Make the current semi-public avpriv_ac3_parse_header() private to lavc.
Signed-off-by: Diego Biurrun <diego@biurrun.de>
Diffstat (limited to 'libavcodec/ac3_parser_internal.h')
-rw-r--r-- | libavcodec/ac3_parser_internal.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libavcodec/ac3_parser_internal.h b/libavcodec/ac3_parser_internal.h new file mode 100644 index 0000000000..5e305e8352 --- /dev/null +++ b/libavcodec/ac3_parser_internal.h @@ -0,0 +1,39 @@ +/* + * AC-3 parser internal code + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; 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); + +#endif /* AVCODEC_AC3_PARSER_INTERNAL_H */ |