| Line | Branch | Exec | Source |
|---|---|---|---|
| 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/attributes.h" | ||
| 28 | #include "libavutil/intreadwrite.h" | ||
| 29 | #include "libavutil/rational.h" | ||
| 30 | |||
| 31 | /** Additional profile info flags */ | ||
| 32 | #define DNXHD_INTERLACED (1<<0) | ||
| 33 | #define DNXHD_MBAFF (1<<1) | ||
| 34 | #define DNXHD_444 (1<<2) | ||
| 35 | |||
| 36 | /** Frame headers, extra 0x00 added to end for parser */ | ||
| 37 | #define DNXHD_HEADER_INITIAL 0x000002800100 | ||
| 38 | #define DNXHD_HEADER_444 0x000002800200 | ||
| 39 | |||
| 40 | /** Indicate that a CIDEntry value must be read in the bitstream */ | ||
| 41 | #define DNXHD_VARIABLE 0 | ||
| 42 | |||
| 43 | typedef struct CIDEntry { | ||
| 44 | int cid; | ||
| 45 | unsigned int width, height; | ||
| 46 | unsigned int frame_size; | ||
| 47 | unsigned int coding_unit_size; | ||
| 48 | uint16_t flags; | ||
| 49 | int index_bits; | ||
| 50 | int bit_depth; | ||
| 51 | int eob_index; | ||
| 52 | const uint8_t *luma_weight, *chroma_weight; | ||
| 53 | const uint8_t *dc_codes, *dc_bits; | ||
| 54 | const uint16_t *ac_codes; | ||
| 55 | const uint8_t *ac_bits, *ac_info; | ||
| 56 | const uint16_t *run_codes; | ||
| 57 | const uint8_t *run_bits, *run; | ||
| 58 | int bit_rates[5]; ///< Helper to choose variants, rounded to nearest 5Mb/s | ||
| 59 | AVRational packet_scale; | ||
| 60 | } CIDEntry; | ||
| 61 | |||
| 62 | const CIDEntry *ff_dnxhd_get_cid_table(int cid); | ||
| 63 | int ff_dnxhd_find_cid(AVCodecContext *avctx, int bit_depth); | ||
| 64 | void ff_dnxhd_print_profiles(AVCodecContext *avctx, int loglevel); | ||
| 65 | |||
| 66 | 9899 | static av_always_inline uint64_t ff_dnxhd_check_header_prefix_hr(uint64_t prefix) | |
| 67 | { | ||
| 68 | 9899 | uint64_t data_offset = prefix >> 16; | |
| 69 |
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9899 | if ((prefix & 0xFFFF0000FFFFLL) == 0x0300 && |
| 70 |
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656 | data_offset >= 0x0280 && data_offset <= 0x2170 && |
| 71 |
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656 | (data_offset & 3) == 0) |
| 72 | 656 | return prefix; | |
| 73 | 9243 | return 0; | |
| 74 | } | ||
| 75 | |||
| 76 | 10235 | static av_always_inline uint64_t ff_dnxhd_check_header_prefix(uint64_t prefix) | |
| 77 | { | ||
| 78 |
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10235 | if (prefix == DNXHD_HEADER_INITIAL || |
| 79 |
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9791 | prefix == DNXHD_HEADER_444 || |
| 80 | 9791 | ff_dnxhd_check_header_prefix_hr(prefix)) | |
| 81 | 992 | return prefix; | |
| 82 | 9243 | return 0; | |
| 83 | } | ||
| 84 | |||
| 85 | 7709 | static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf) | |
| 86 | { | ||
| 87 | 7709 | uint64_t prefix = AV_RB32(buf); | |
| 88 | 7709 | prefix = (prefix << 16) | buf[4] << 8; | |
| 89 | 7709 | return ff_dnxhd_check_header_prefix(prefix); | |
| 90 | } | ||
| 91 | |||
| 92 | int ff_dnxhd_get_frame_size(int cid); | ||
| 93 | int ff_dnxhd_get_hr_frame_size(int cid, int w, int h); | ||
| 94 | |||
| 95 | #endif /* AVCODEC_DNXHDDATA_H */ | ||
| 96 |