#ifndef _AACADTSDEC_H_d019ae44_
#define _AACADTSDEC_H_d019ae44_

/*
 * This file was stolen from ffmpeg and modified for usability here.
 *  The original is
 * 
 * Copyright (c) 2003 Fabrice Bellard
 * Copyright (c) 2003 Michael Niedermayer
 *
 * This version is a derivative work of that version.  It is not free
 *  software; it is licensed under the GNU Lesser General Public
 *  License version 2.1, which places nontrivial restrictions on what
 *  may be done with it.  (I'm not terribly happy about that, but for
 *  my purposes accepting LGPL-infected code is a lower price than
 *  reimplementing it all myself.)
 *
 * The LGPL v2.1 as distributed with ffmpeg is in the accompanying file
 *  `LGPL-v2.1'.
 */

#include <stdint.h>

#include "get_bits.h"

#define AAC_ADTS_HEADER_SIZE 7

typedef struct {
    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