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| 4349 | Serge | 1 | /* |
| 2 | * AC-3 parser prototypes |
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| 3 | * Copyright (c) 2003 Fabrice Bellard |
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| 4 | * Copyright (c) 2003 Michael Niedermayer |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #ifndef AVCODEC_AC3_PARSER_H |
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| 24 | #define AVCODEC_AC3_PARSER_H |
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| 25 | |||
| 26 | #include "ac3.h" |
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| 27 | #include "get_bits.h" |
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| 28 | |||
| 29 | /** |
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| 30 | * Parse AC-3 frame header. |
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| 31 | * Parse the header up to the lfeon element, which is the first 52 or 54 bits |
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| 32 | * depending on the audio coding mode. |
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| 33 | * @param[in] gbc BitContext containing the first 54 bits of the frame. |
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| 34 | * @param[out] hdr Pointer to struct where header info is written. |
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| 35 | * @return Returns 0 on success, -1 if there is a sync word mismatch, |
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| 36 | * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate) |
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| 37 | * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid. |
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| 38 | */ |
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| 39 | int avpriv_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr); |
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| 40 | |||
| 41 | #endif /* AVCODEC_AC3_PARSER_H */ |