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75 lines
2.2 KiB
75 lines
2.2 KiB
/* |
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* FLAC (Free Lossless Audio Codec) common stuff |
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* Copyright (c) 2008 Justin Ruggles |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* FLAC (Free Lossless Audio Codec) common stuff |
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*/ |
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#ifndef AVCODEC_FLAC_H |
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#define AVCODEC_FLAC_H |
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#include "libavutil/intreadwrite.h" |
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#define FLAC_STREAMINFO_SIZE 34 |
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#define FLAC_MAX_CHANNELS 8 |
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#define FLAC_MIN_BLOCKSIZE 16 |
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#define FLAC_MAX_BLOCKSIZE 65535 |
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#define FLAC_MIN_FRAME_SIZE 10 |
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enum { |
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FLAC_CHMODE_INDEPENDENT = 0, |
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FLAC_CHMODE_LEFT_SIDE = 1, |
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FLAC_CHMODE_RIGHT_SIDE = 2, |
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FLAC_CHMODE_MID_SIDE = 3, |
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}; |
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enum { |
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FLAC_METADATA_TYPE_STREAMINFO = 0, |
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FLAC_METADATA_TYPE_PADDING, |
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FLAC_METADATA_TYPE_APPLICATION, |
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FLAC_METADATA_TYPE_SEEKTABLE, |
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FLAC_METADATA_TYPE_VORBIS_COMMENT, |
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FLAC_METADATA_TYPE_CUESHEET, |
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FLAC_METADATA_TYPE_PICTURE, |
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FLAC_METADATA_TYPE_INVALID = 127 |
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}; |
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/** |
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* Parse the metadata block parameters from the header. |
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* @param[in] block_header header data, at least 4 bytes |
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* @param[out] last indicator for last metadata block |
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* @param[out] type metadata block type |
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* @param[out] size metadata block size |
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*/ |
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static av_always_inline void flac_parse_block_header(const uint8_t *block_header, |
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int *last, int *type, int *size) |
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{ |
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int tmp = *block_header; |
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if (last) |
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*last = tmp & 0x80; |
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if (type) |
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*type = tmp & 0x7F; |
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if (size) |
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*size = AV_RB24(block_header + 1); |
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} |
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#endif /* AVCODEC_FLAC_H */
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