/*

  * 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);

 #endif /* AVCODEC_AACADTSDEC_H */