blob: 89262a13c1c33c25d99274ca70470636fffc74e3
| 1 | /* |
| 2 | * VC3/DNxHD decoder. |
| 3 | * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> |
| 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 | #ifndef AVCODEC_DNXHDDATA_H |
| 23 | #define AVCODEC_DNXHDDATA_H |
| 24 | |
| 25 | #include <stdint.h> |
| 26 | #include "avcodec.h" |
| 27 | #include "libavutil/internal.h" |
| 28 | #include "libavutil/intreadwrite.h" |
| 29 | |
| 30 | /** Additional profile info flags */ |
| 31 | #define DNXHD_INTERLACED (1<<0) |
| 32 | #define DNXHD_MBAFF (1<<1) |
| 33 | #define DNXHD_444 (1<<2) |
| 34 | |
| 35 | /** Frame headers, extra 0x00 added to end for parser */ |
| 36 | #define DNXHD_HEADER_INITIAL 0x000002800100 |
| 37 | #define DNXHD_HEADER_444 0x000002800200 |
| 38 | |
| 39 | /** Indicate that a CIDEntry value must be read in the bitstream */ |
| 40 | #define DNXHD_VARIABLE 0 |
| 41 | |
| 42 | typedef struct CIDEntry { |
| 43 | int cid; |
| 44 | unsigned int width, height; |
| 45 | unsigned int frame_size; |
| 46 | unsigned int coding_unit_size; |
| 47 | uint16_t flags; |
| 48 | int index_bits; |
| 49 | int bit_depth; |
| 50 | int eob_index; |
| 51 | const uint8_t *luma_weight, *chroma_weight; |
| 52 | const uint8_t *dc_codes, *dc_bits; |
| 53 | const uint16_t *ac_codes; |
| 54 | const uint8_t *ac_bits, *ac_info; |
| 55 | const uint16_t *run_codes; |
| 56 | const uint8_t *run_bits, *run; |
| 57 | int bit_rates[5]; ///< Helper to choose variants, rounded to nearest 5Mb/s |
| 58 | AVRational frame_rates[5]; |
| 59 | AVRational packet_scale; |
| 60 | } CIDEntry; |
| 61 | |
| 62 | extern const CIDEntry ff_dnxhd_cid_table[]; |
| 63 | |
| 64 | int ff_dnxhd_get_cid_table(int cid); |
| 65 | int ff_dnxhd_find_cid(AVCodecContext *avctx, int bit_depth); |
| 66 | void ff_dnxhd_print_profiles(AVCodecContext *avctx, int loglevel); |
| 67 | |
| 68 | static av_always_inline uint64_t ff_dnxhd_check_header_prefix_hr(uint64_t prefix) |
| 69 | { |
| 70 | uint64_t data_offset = prefix >> 16; |
| 71 | if ((prefix & 0xFFFF0000FFFFLL) == 0x0300 && |
| 72 | data_offset >= 0x0280 && data_offset <= 0x2170 && |
| 73 | (data_offset & 3) == 0) |
| 74 | return prefix; |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | static av_always_inline uint64_t ff_dnxhd_check_header_prefix(uint64_t prefix) |
| 79 | { |
| 80 | if (prefix == DNXHD_HEADER_INITIAL || |
| 81 | prefix == DNXHD_HEADER_444 || |
| 82 | ff_dnxhd_check_header_prefix_hr(prefix)) |
| 83 | return prefix; |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf) |
| 88 | { |
| 89 | uint64_t prefix = AV_RB32(buf); |
| 90 | prefix = (prefix << 16) | buf[4] << 8; |
| 91 | return ff_dnxhd_check_header_prefix(prefix); |
| 92 | } |
| 93 | |
| 94 | int avpriv_dnxhd_get_frame_size(int cid); |
| 95 | int avpriv_dnxhd_get_interlaced(int cid); |
| 96 | #if LIBAVCODEC_VERSION_MAJOR < 58 |
| 97 | attribute_deprecated |
| 98 | uint64_t avpriv_dnxhd_parse_header_prefix(const uint8_t *buf); |
| 99 | #endif |
| 100 | #endif /* AVCODEC_DNXHDDATA_H */ |
| 101 |