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 packet_scale; |
59 |
|
|
} CIDEntry; |
60 |
|
|
|
61 |
|
|
extern const CIDEntry ff_dnxhd_cid_table[]; |
62 |
|
|
|
63 |
|
|
int ff_dnxhd_get_cid_table(int cid); |
64 |
|
|
int ff_dnxhd_find_cid(AVCodecContext *avctx, int bit_depth); |
65 |
|
|
void ff_dnxhd_print_profiles(AVCodecContext *avctx, int loglevel); |
66 |
|
|
|
67 |
|
9117 |
static av_always_inline uint64_t ff_dnxhd_check_header_prefix_hr(uint64_t prefix) |
68 |
|
|
{ |
69 |
|
9117 |
uint64_t data_offset = prefix >> 16; |
70 |
✓✓✓✓
|
9117 |
if ((prefix & 0xFFFF0000FFFFLL) == 0x0300 && |
71 |
✓✗ |
656 |
data_offset >= 0x0280 && data_offset <= 0x2170 && |
72 |
✓✗ |
656 |
(data_offset & 3) == 0) |
73 |
|
656 |
return prefix; |
74 |
|
8461 |
return 0; |
75 |
|
|
} |
76 |
|
|
|
77 |
|
9453 |
static av_always_inline uint64_t ff_dnxhd_check_header_prefix(uint64_t prefix) |
78 |
|
|
{ |
79 |
✓✓✓✓
|
9453 |
if (prefix == DNXHD_HEADER_INITIAL || |
80 |
✓✓ |
9009 |
prefix == DNXHD_HEADER_444 || |
81 |
|
9009 |
ff_dnxhd_check_header_prefix_hr(prefix)) |
82 |
|
992 |
return prefix; |
83 |
|
8461 |
return 0; |
84 |
|
|
} |
85 |
|
|
|
86 |
|
6927 |
static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf) |
87 |
|
|
{ |
88 |
|
6927 |
uint64_t prefix = AV_RB32(buf); |
89 |
|
6927 |
prefix = (prefix << 16) | buf[4] << 8; |
90 |
|
6927 |
return ff_dnxhd_check_header_prefix(prefix); |
91 |
|
|
} |
92 |
|
|
|
93 |
|
|
int avpriv_dnxhd_get_frame_size(int cid); |
94 |
|
|
int avpriv_dnxhd_get_hr_frame_size(int cid, int w, int h); |
95 |
|
|
int avpriv_dnxhd_get_interlaced(int cid); |
96 |
|
|
|
97 |
|
|
#endif /* AVCODEC_DNXHDDATA_H */ |