Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / aacadtsdec.h
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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
31typedef 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 */
52int avpriv_aac_parse_header(GetBitContext *gbc, AACADTSHeaderInfo *hdr);
53
54#endif /* AVCODEC_AACADTSDEC_H */