| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * FLAC (Free Lossless Audio Codec) common stuff | ||
| 3 | * Copyright (c) 2008 Justin Ruggles | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | /** | ||
| 23 | * @file | ||
| 24 | * FLAC (Free Lossless Audio Codec) common stuff | ||
| 25 | */ | ||
| 26 | |||
| 27 | #ifndef AVCODEC_FLAC_H | ||
| 28 | #define AVCODEC_FLAC_H | ||
| 29 | |||
| 30 | #include "libavutil/intreadwrite.h" | ||
| 31 | |||
| 32 | #define FLAC_STREAMINFO_SIZE 34 | ||
| 33 | #define FLAC_MAX_CHANNELS 8 | ||
| 34 | #define FLAC_MIN_BLOCKSIZE 16 | ||
| 35 | #define FLAC_MAX_BLOCKSIZE 65535 | ||
| 36 | #define FLAC_MIN_FRAME_SIZE 10 | ||
| 37 | |||
| 38 | enum { | ||
| 39 | FLAC_CHMODE_INDEPENDENT = 0, | ||
| 40 | FLAC_CHMODE_LEFT_SIDE = 1, | ||
| 41 | FLAC_CHMODE_RIGHT_SIDE = 2, | ||
| 42 | FLAC_CHMODE_MID_SIDE = 3, | ||
| 43 | }; | ||
| 44 | |||
| 45 | enum { | ||
| 46 | FLAC_METADATA_TYPE_STREAMINFO = 0, | ||
| 47 | FLAC_METADATA_TYPE_PADDING, | ||
| 48 | FLAC_METADATA_TYPE_APPLICATION, | ||
| 49 | FLAC_METADATA_TYPE_SEEKTABLE, | ||
| 50 | FLAC_METADATA_TYPE_VORBIS_COMMENT, | ||
| 51 | FLAC_METADATA_TYPE_CUESHEET, | ||
| 52 | FLAC_METADATA_TYPE_PICTURE, | ||
| 53 | FLAC_METADATA_TYPE_INVALID = 127 | ||
| 54 | }; | ||
| 55 | |||
| 56 | /** | ||
| 57 | * Parse the metadata block parameters from the header. | ||
| 58 | * @param[in] block_header header data, at least 4 bytes | ||
| 59 | * @param[out] last indicator for last metadata block | ||
| 60 | * @param[out] type metadata block type | ||
| 61 | * @param[out] size metadata block size | ||
| 62 | */ | ||
| 63 | 125 | static av_always_inline void flac_parse_block_header(const uint8_t *block_header, | |
| 64 | int *last, int *type, int *size) | ||
| 65 | { | ||
| 66 | 125 | int tmp = *block_header; | |
| 67 |
1/2✓ Branch 0 taken 125 times.
✗ Branch 1 not taken.
|
125 | if (last) |
| 68 | 125 | *last = tmp & 0x80; | |
| 69 |
1/2✓ Branch 0 taken 125 times.
✗ Branch 1 not taken.
|
125 | if (type) |
| 70 | 125 | *type = tmp & 0x7F; | |
| 71 |
1/2✓ Branch 0 taken 125 times.
✗ Branch 1 not taken.
|
125 | if (size) |
| 72 | 125 | *size = AV_RB24(block_header + 1); | |
| 73 | 125 | } | |
| 74 | |||
| 75 | #endif /* AVCODEC_FLAC_H */ | ||
| 76 |