vorbis_parser.h (2285B)
1 /* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 /** 20 * @file 21 * A public API for Vorbis parsing 22 * 23 * Determines the duration for each packet. 24 */ 25 26 #ifndef AVCODEC_VORBIS_PARSER_H 27 #define AVCODEC_VORBIS_PARSER_H 28 29 #include <stdint.h> 30 31 typedef struct AVVorbisParseContext AVVorbisParseContext; 32 33 /** 34 * Allocate and initialize the Vorbis parser using headers in the extradata. 35 */ 36 AVVorbisParseContext *av_vorbis_parse_init(const uint8_t *extradata, 37 int extradata_size); 38 39 /** 40 * Free the parser and everything associated with it. 41 */ 42 void av_vorbis_parse_free(AVVorbisParseContext **s); 43 44 #define VORBIS_FLAG_HEADER 0x00000001 45 #define VORBIS_FLAG_COMMENT 0x00000002 46 #define VORBIS_FLAG_SETUP 0x00000004 47 48 /** 49 * Get the duration for a Vorbis packet. 50 * 51 * If @p flags is @c NULL, 52 * special frames are considered invalid. 53 * 54 * @param s Vorbis parser context 55 * @param buf buffer containing a Vorbis frame 56 * @param buf_size size of the buffer 57 * @param flags flags for special frames 58 */ 59 int av_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf, 60 int buf_size, int *flags); 61 62 /** 63 * Get the duration for a Vorbis packet. 64 * 65 * @param s Vorbis parser context 66 * @param buf buffer containing a Vorbis frame 67 * @param buf_size size of the buffer 68 */ 69 int av_vorbis_parse_frame(AVVorbisParseContext *s, const uint8_t *buf, 70 int buf_size); 71 72 void av_vorbis_parse_reset(AVVorbisParseContext *s); 73 74 #endif /* AVCODEC_VORBIS_PARSER_H */