FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/dnxhddata.h
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 17 17 100.0%
Functions: 3 3 100.0%
Branches: 12 14 85.7%

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 9496 static av_always_inline uint64_t ff_dnxhd_check_header_prefix_hr(uint64_t prefix)
67 {
68 9496 uint64_t data_offset = prefix >> 16;
69
4/4
✓ Branch 0 taken 701 times.
✓ Branch 1 taken 8795 times.
✓ Branch 2 taken 656 times.
✓ Branch 3 taken 45 times.
9496 if ((prefix & 0xFFFF0000FFFFLL) == 0x0300 &&
70
1/2
✓ Branch 0 taken 656 times.
✗ Branch 1 not taken.
656 data_offset >= 0x0280 && data_offset <= 0x2170 &&
71
1/2
✓ Branch 0 taken 656 times.
✗ Branch 1 not taken.
656 (data_offset & 3) == 0)
72 656 return prefix;
73 8840 return 0;
74 }
75
76 9832 static av_always_inline uint64_t ff_dnxhd_check_header_prefix(uint64_t prefix)
77 {
78
4/4
✓ Branch 0 taken 9390 times.
✓ Branch 1 taken 442 times.
✓ Branch 2 taken 9388 times.
✓ Branch 3 taken 2 times.
9832 if (prefix == DNXHD_HEADER_INITIAL ||
79
2/2
✓ Branch 0 taken 548 times.
✓ Branch 1 taken 8840 times.
9388 prefix == DNXHD_HEADER_444 ||
80 9388 ff_dnxhd_check_header_prefix_hr(prefix))
81 992 return prefix;
82 8840 return 0;
83 }
84
85 7306 static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf)
86 {
87 7306 uint64_t prefix = AV_RB32(buf);
88 7306 prefix = (prefix << 16) | buf[4] << 8;
89 7306 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