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author | Michael Niedermayer <michaelni@gmx.at> | 2014-11-06 11:21:47 +0100 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2014-11-06 11:21:47 +0100 |
commit | 44fa2671e0db0bb1a92c365fb3c9c2d1cd7199ca (patch) | |
tree | 3eede210817e4cd60b1a868cfc74ccf6955495a7 /libavcodec/vorbis_parser_internal.h | |
parent | 5f7887ca8d056d2debdd2c3b205ada7305d9ac07 (diff) | |
parent | 5e80fb7ff226f136dbcf3fed00a2966bf8e9bd70 (diff) | |
download | ffmpeg-44fa2671e0db0bb1a92c365fb3c9c2d1cd7199ca.tar.gz |
Merge commit '5e80fb7ff226f136dbcf3fed00a2966bf8e9bd70'
* commit '5e80fb7ff226f136dbcf3fed00a2966bf8e9bd70':
lavc: add a public API for parsing vorbis packets.
Conflicts:
doc/APIchanges
libavcodec/Makefile
libavcodec/version.h
libavcodec/vorbis_parser.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/vorbis_parser_internal.h')
-rw-r--r-- | libavcodec/vorbis_parser_internal.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/libavcodec/vorbis_parser_internal.h b/libavcodec/vorbis_parser_internal.h new file mode 100644 index 0000000000..885793ff52 --- /dev/null +++ b/libavcodec/vorbis_parser_internal.h @@ -0,0 +1,71 @@ +/* + * Copyright (c) 2012 Justin Ruggles + * + * 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 + */ + +/** + * @file + * Vorbis audio parser + * + * Determines the duration for each packet. + */ + +#ifndef AVCODEC_VORBIS_PARSER_H +#define AVCODEC_VORBIS_PARSER_H + +#include "avcodec.h" +#include "vorbis_parser.h" + +struct AVVorbisParseContext { + const AVClass *class; + int extradata_parsed; ///< we have attempted to parse extradata + int valid_extradata; ///< extradata is valid, so we can calculate duration + int blocksize[2]; ///< short and long window sizes + int previous_blocksize; ///< previous window size + int mode_blocksize[64]; ///< window size mapping for each mode + int mode_count; ///< number of modes + int mode_mask; ///< bitmask used to get the mode in each packet + int prev_mask; ///< bitmask used to get the previous mode flag in each packet +}; + +#if LIBAVCODEC_VERSION_MAJOR < 57 +/** + * Initialize the Vorbis parser using headers in the extradata. + * + * @param avctx codec context + * @param s Vorbis parser context + */ +int avpriv_vorbis_parse_extradata(AVCodecContext *avctx, AVVorbisParseContext *s); + +/** + * Get the duration for a Vorbis packet. + * + * avpriv_vorbis_parse_extradata() must have been successfully called prior to + * this in order for a correct duration to be returned. + * + * @param s Vorbis parser context + * @param buf buffer containing a Vorbis frame + * @param buf_size size of the buffer + */ +int avpriv_vorbis_parse_frame(AVVorbisParseContext *s, const uint8_t *buf, + int buf_size); + +void avpriv_vorbis_parse_reset(AVVorbisParseContext *s); +#endif + +#endif /* AVCODEC_VORBIS_PARSER_H */ |