| /* |
| * FLAC (Free Lossless Audio Codec) common stuff |
| * Copyright (c) 2008 Justin Ruggles |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * FLAC (Free Lossless Audio Codec) common stuff |
| */ |
| |
| #ifndef AVCODEC_FLAC_H |
| #define AVCODEC_FLAC_H |
| |
| #include "libavutil/intreadwrite.h" |
| |
| #define FLAC_STREAMINFO_SIZE 34 |
| #define FLAC_MAX_CHANNELS 8 |
| #define FLAC_MIN_BLOCKSIZE 16 |
| #define FLAC_MAX_BLOCKSIZE 65535 |
| #define FLAC_MIN_FRAME_SIZE 10 |
| |
| enum { |
| FLAC_CHMODE_INDEPENDENT = 0, |
| FLAC_CHMODE_LEFT_SIDE = 1, |
| FLAC_CHMODE_RIGHT_SIDE = 2, |
| FLAC_CHMODE_MID_SIDE = 3, |
| }; |
| |
| enum { |
| FLAC_METADATA_TYPE_STREAMINFO = 0, |
| FLAC_METADATA_TYPE_PADDING, |
| FLAC_METADATA_TYPE_APPLICATION, |
| FLAC_METADATA_TYPE_SEEKTABLE, |
| FLAC_METADATA_TYPE_VORBIS_COMMENT, |
| FLAC_METADATA_TYPE_CUESHEET, |
| FLAC_METADATA_TYPE_PICTURE, |
| FLAC_METADATA_TYPE_INVALID = 127 |
| }; |
| |
| /** |
| * Parse the metadata block parameters from the header. |
| * @param[in] block_header header data, at least 4 bytes |
| * @param[out] last indicator for last metadata block |
| * @param[out] type metadata block type |
| * @param[out] size metadata block size |
| */ |
| static av_always_inline void flac_parse_block_header(const uint8_t *block_header, |
| int *last, int *type, int *size) |
| { |
| int tmp = *block_header; |
| if (last) |
| *last = tmp & 0x80; |
| if (type) |
| *type = tmp & 0x7F; |
| if (size) |
| *size = AV_RB24(block_header + 1); |
| } |
| |
| #endif /* AVCODEC_FLAC_H */ |