repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * AAC ADTS header decoding prototypes and structures | |
| 3 | * Copyright (c) 2003 Fabrice Bellard | |
| 4 | * Copyright (c) 2003 Michael Niedermayer | |
| 5 | * | |
| 6 | * This file is part of FFmpeg. | |
| 7 | * | |
| 8 | * FFmpeg is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU Lesser General Public | |
| 10 | * License as published by the Free Software Foundation; either | |
| 11 | * version 2.1 of the License, or (at your option) any later version. | |
| 12 | * | |
| 13 | * FFmpeg is distributed in the hope that it will be useful, | |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 | * Lesser General Public License for more details. | |
| 17 | * | |
| 18 | * You should have received a copy of the GNU Lesser General Public | |
| 19 | * License along with FFmpeg; if not, write to the Free Software | |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 21 | */ | |
| 22 | ||
| 23 | #ifndef AVCODEC_AACADTSDEC_H | |
| 24 | #define AVCODEC_AACADTSDEC_H | |
| 25 | ||
| 26 | #include <stdint.h> | |
| 27 | #include "get_bits.h" | |
| 28 | ||
| 29 | #define AAC_ADTS_HEADER_SIZE 7 | |
| 30 | ||
| 31 | typedef struct AACADTSHeaderInfo { | |
| 32 | uint32_t sample_rate; | |
| 33 | uint32_t samples; | |
| 34 | uint32_t bit_rate; | |
| 35 | uint8_t crc_absent; | |
| 36 | uint8_t object_type; | |
| 37 | uint8_t sampling_index; | |
| 38 | uint8_t chan_config; | |
| 39 | uint8_t num_aac_frames; | |
| 40 | } AACADTSHeaderInfo; | |
| 41 | ||
| 42 | /** | |
| 43 | * Parse AAC frame header. | |
| 44 | * Parse the ADTS frame header to the end of the variable header, which is | |
| 45 | * the first 54 bits. | |
| 46 | * @param[in] gbc BitContext containing the first 54 bits of the frame. | |
| 47 | * @param[out] hdr Pointer to struct where header info is written. | |
| 48 | * @return Returns 0 on success, -1 if there is a sync word mismatch, | |
| 49 | * -2 if the version element is invalid, -3 if the sample rate | |
| 50 | * element is invalid, or -4 if the bit rate element is invalid. | |
| 51 | */ | |
| 52 | int avpriv_aac_parse_header(GetBitContext *gbc, AACADTSHeaderInfo *hdr); | |
| 53 | ||
| 54 | #endif /* AVCODEC_AACADTSDEC_H */ |