3 * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
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.
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.
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
22 #ifndef AVCODEC_DNXHDDATA_H
23 #define AVCODEC_DNXHDDATA_H
27 #include "libavutil/internal.h"
28 #include "libavutil/intreadwrite.h"
30 /** Additional profile info flags */
31 #define DNXHD_INTERLACED (1<<0)
32 #define DNXHD_MBAFF (1<<1)
33 #define DNXHD_444 (1<<2)
35 /** Frame headers, extra 0x00 added to end for parser */
36 #define DNXHD_HEADER_INITIAL 0x000002800100
37 #define DNXHD_HEADER_444 0x000002800200
39 /** Indicate that a CIDEntry value must be read in the bitstream */
40 #define DNXHD_VARIABLE 0
42 typedef struct CIDEntry {
44 unsigned int width, height;
45 unsigned int frame_size;
46 unsigned int coding_unit_size;
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;
62 extern const CIDEntry ff_dnxhd_cid_table[];
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);
68 static av_always_inline uint64_t ff_dnxhd_check_header_prefix_hr(uint64_t prefix)
70 uint64_t data_offset = prefix >> 16;
71 if ((prefix & 0xFFFF0000FFFFLL) == 0x0300 &&
72 data_offset >= 0x0280 && data_offset <= 0x2170 &&
73 (data_offset & 3) == 0)
78 static av_always_inline uint64_t ff_dnxhd_check_header_prefix(uint64_t prefix)
80 if (prefix == DNXHD_HEADER_INITIAL ||
81 prefix == DNXHD_HEADER_444 ||
82 ff_dnxhd_check_header_prefix_hr(prefix))
87 static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf)
89 uint64_t prefix = AV_RB32(buf);
90 prefix = (prefix << 16) | buf[4] << 8;
91 return ff_dnxhd_check_header_prefix(prefix);
94 int avpriv_dnxhd_get_frame_size(int cid);
95 int avpriv_dnxhd_get_interlaced(int cid);
96 #if LIBAVCODEC_VERSION_MAJOR < 58
98 uint64_t avpriv_dnxhd_parse_header_prefix(const uint8_t *buf);
100 #endif /* AVCODEC_DNXHDDATA_H */