diff options
author | James Almer <jamrial@gmail.com> | 2017-10-27 13:52:19 -0300 |
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committer | James Almer <jamrial@gmail.com> | 2017-10-27 18:15:37 -0300 |
commit | e0250cf3651e6417e0117486a7816b45fb2d34cd (patch) | |
tree | fd04f7310c17247d93843ea177ef6f9d644296c4 /libavcodec/ac3_parser_internal.h | |
parent | 5834cba05efbfd24dadedd187753f244ad7e0cab (diff) | |
parent | 50a1c66cf6ab7eb683daaa9e2da3869fa3a54609 (diff) |
Merge commit '50a1c66cf6ab7eb683daaa9e2da3869fa3a54609'
* commit '50a1c66cf6ab7eb683daaa9e2da3869fa3a54609':
ac3_parser: add a public function for parsing the data required by the demuxer
avpriv_ac3_parse_header() is left in place but without the
GetBitContext parameter, as the mov muxer requires a lot more fields
than just bitstream_id and frame_size from the AC3HeaderInfo struct.
Merged-by: James Almer <jamrial@gmail.com>
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 */ |