0,0 → 1,54 |
/* |
* AAC ADTS header decoding prototypes and structures |
* Copyright (c) 2003 Fabrice Bellard |
* Copyright (c) 2003 Michael Niedermayer |
* |
* 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 |
*/ |
|
#ifndef AVCODEC_AACADTSDEC_H |
#define AVCODEC_AACADTSDEC_H |
|
#include <stdint.h> |
#include "get_bits.h" |
|
#define AAC_ADTS_HEADER_SIZE 7 |
|
typedef struct AACADTSHeaderInfo { |
uint32_t sample_rate; |
uint32_t samples; |
uint32_t bit_rate; |
uint8_t crc_absent; |
uint8_t object_type; |
uint8_t sampling_index; |
uint8_t chan_config; |
uint8_t num_aac_frames; |
} AACADTSHeaderInfo; |
|
/** |
* Parse AAC frame header. |
* Parse the ADTS frame header to the end of the variable header, which is |
* the first 54 bits. |
* @param[in] gbc BitContext containing the first 54 bits of the frame. |
* @param[out] hdr Pointer to struct where header info is written. |
* @return Returns 0 on success, -1 if there is a sync word mismatch, |
* -2 if the version element is invalid, -3 if the sample rate |
* element is invalid, or -4 if the bit rate element is invalid. |
*/ |
int avpriv_aac_parse_header(GetBitContext *gbc, AACADTSHeaderInfo *hdr); |
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#endif /* AVCODEC_AACADTSDEC_H */ |