blob: 92050277ed193dc319d6c03f84bdad4fa46169dc
| 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 | * @param avctx codec context |
| 37 | * @param s Vorbis parser context |
| 38 | */ |
| 39 | AVVorbisParseContext *av_vorbis_parse_init(const uint8_t *extradata, |
| 40 | int extradata_size); |
| 41 | |
| 42 | /** |
| 43 | * Free the parser and everything associated with it. |
| 44 | */ |
| 45 | void av_vorbis_parse_free(AVVorbisParseContext **s); |
| 46 | |
| 47 | #define VORBIS_FLAG_HEADER 0x00000001 |
| 48 | #define VORBIS_FLAG_COMMENT 0x00000002 |
| 49 | #define VORBIS_FLAG_SETUP 0x00000004 |
| 50 | |
| 51 | /** |
| 52 | * Get the duration for a Vorbis packet. |
| 53 | * |
| 54 | * If @p flags is @c NULL, |
| 55 | * special frames are considered invalid. |
| 56 | * |
| 57 | * @param s Vorbis parser context |
| 58 | * @param buf buffer containing a Vorbis frame |
| 59 | * @param buf_size size of the buffer |
| 60 | * @param flags flags for special frames |
| 61 | */ |
| 62 | int av_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf, |
| 63 | int buf_size, int *flags); |
| 64 | |
| 65 | /** |
| 66 | * Get the duration for a Vorbis packet. |
| 67 | * |
| 68 | * @param s Vorbis parser context |
| 69 | * @param buf buffer containing a Vorbis frame |
| 70 | * @param buf_size size of the buffer |
| 71 | */ |
| 72 | int av_vorbis_parse_frame(AVVorbisParseContext *s, const uint8_t *buf, |
| 73 | int buf_size); |
| 74 | |
| 75 | void av_vorbis_parse_reset(AVVorbisParseContext *s); |
| 76 | |
| 77 | #endif /* AVCODEC_VORBIS_PARSER_H */ |
| 78 |