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/* |
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* AAC ADTS header decoding prototypes and structures |
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* 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
*/
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#ifndef AVCODEC_AACADTSDEC_H
#define AVCODEC_AACADTSDEC_H |
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#include <stdint.h> |
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#include "get_bits.h" |
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|
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#define AAC_ADTS_HEADER_SIZE 7
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typedef struct AACADTSHeaderInfo { |
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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;
/** |
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* Parse AAC frame header.
* Parse the ADTS frame header to the end of the variable header, which is |
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* the first 54 bits. |
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* @param[in] gbc BitContext containing the first 54 bits of the frame.
* @param[out] hdr Pointer to struct where header info is written. |
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* @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.
*/ |
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int avpriv_aac_parse_header(GetBitContext *gbc, AACADTSHeaderInfo *hdr); |
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#endif /* AVCODEC_AACADTSDEC_H */ |