Directory: | ../../../ffmpeg/ |
---|---|
File: | src/libavcodec/tak_parser.c |
Date: | 2022-07-07 01:21:54 |
Exec | Total | Coverage | |
---|---|---|---|
Lines: | 49 | 57 | 86.0% |
Branches: | 38 | 50 | 76.0% |
Line | Branch | Exec | Source |
---|---|---|---|
1 | /* | ||
2 | * TAK parser | ||
3 | * Copyright (c) 2012 Michael Niedermayer | ||
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 | /** | ||
23 | * @file | ||
24 | * TAK parser | ||
25 | **/ | ||
26 | |||
27 | #define BITSTREAM_READER_LE | ||
28 | #include "parser.h" | ||
29 | #include "tak.h" | ||
30 | |||
31 | typedef struct TAKParseContext { | ||
32 | ParseContext pc; | ||
33 | TAKStreamInfo ti; | ||
34 | int index; | ||
35 | } TAKParseContext; | ||
36 | |||
37 | 1026 | static int tak_parse(AVCodecParserContext *s, AVCodecContext *avctx, | |
38 | const uint8_t **poutbuf, int *poutbuf_size, | ||
39 | const uint8_t *buf, int buf_size) | ||
40 | { | ||
41 | 1026 | TAKParseContext *t = s->priv_data; | |
42 | 1026 | ParseContext *pc = &t->pc; | |
43 | 1026 | int next = END_NOT_FOUND; | |
44 | GetBitContext gb; | ||
45 | 1026 | int consumed = 0; | |
46 |
2/2✓ Branch 0 taken 1024 times.
✓ Branch 1 taken 2 times.
|
1026 | int needed = buf_size ? TAK_MAX_FRAME_HEADER_BYTES : 8; |
47 | int ret; | ||
48 | |||
49 | 1026 | *poutbuf = buf; | |
50 | 1026 | *poutbuf_size = buf_size; | |
51 | |||
52 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 1026 times.
|
1026 | if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { |
53 | TAKStreamInfo ti; | ||
54 | ✗ | if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0) | |
55 | ✗ | return buf_size; | |
56 | ✗ | if (!ff_tak_decode_frame_header(avctx, &gb, &ti, 127)) | |
57 | ✗ | s->duration = t->ti.last_frame_samples ? t->ti.last_frame_samples | |
58 | ✗ | : t->ti.frame_samples; | |
59 | ✗ | return buf_size; | |
60 | } | ||
61 | |||
62 |
4/4✓ Branch 0 taken 27687 times.
✓ Branch 1 taken 990 times.
✓ Branch 2 taken 1 times.
✓ Branch 3 taken 989 times.
|
28677 | while (buf_size || t->index + needed <= pc->index) { |
63 |
3/4✓ Branch 0 taken 27687 times.
✓ Branch 1 taken 1 times.
✓ Branch 2 taken 27687 times.
✗ Branch 3 not taken.
|
27688 | if (buf_size && t->index + TAK_MAX_FRAME_HEADER_BYTES > pc->index) { |
64 | 27687 | int tmp_buf_size = FFMIN(TAK_MAX_FRAME_HEADER_BYTES, | |
65 | buf_size); | ||
66 | 27687 | const uint8_t *tmp_buf = buf; | |
67 | |||
68 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 27687 times.
|
27687 | if (ff_combine_frame(pc, END_NOT_FOUND, &tmp_buf, &tmp_buf_size) != -1) |
69 | ✗ | goto fail; | |
70 | 27687 | consumed += tmp_buf_size; | |
71 | 27687 | buf += tmp_buf_size; | |
72 | 27687 | buf_size -= tmp_buf_size; | |
73 | } | ||
74 | |||
75 |
2/2✓ Branch 0 taken 1010250 times.
✓ Branch 1 taken 27651 times.
|
1037901 | for (; t->index + needed <= pc->index; t->index++) { |
76 |
2/2✓ Branch 0 taken 3663 times.
✓ Branch 1 taken 1006587 times.
|
1010250 | if (pc->buffer[ t->index ] == 0xFF && |
77 |
2/2✓ Branch 0 taken 86 times.
✓ Branch 1 taken 3577 times.
|
3663 | pc->buffer[ t->index + 1 ] == 0xA0) { |
78 | TAKStreamInfo ti; | ||
79 | |||
80 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 86 times.
|
86 | if ((ret = init_get_bits8(&gb, pc->buffer + t->index, |
81 | 86 | pc->index - t->index)) < 0) | |
82 | ✗ | goto fail; | |
83 |
2/2✓ Branch 1 taken 83 times.
✓ Branch 2 taken 3 times.
|
86 | if (!ff_tak_decode_frame_header(avctx, &gb, |
84 |
4/4✓ Branch 0 taken 48 times.
✓ Branch 1 taken 38 times.
✓ Branch 2 taken 75 times.
✓ Branch 3 taken 8 times.
|
169 | pc->frame_start_found ? &ti : &t->ti, 127) && |
85 | 83 | !ff_tak_check_crc(pc->buffer + t->index, | |
86 | 83 | get_bits_count(&gb) / 8)) { | |
87 |
2/2✓ Branch 0 taken 38 times.
✓ Branch 1 taken 37 times.
|
75 | if (!pc->frame_start_found) { |
88 | 38 | pc->frame_start_found = 1; | |
89 | 76 | s->duration = t->ti.last_frame_samples ? | |
90 |
2/2✓ Branch 0 taken 1 times.
✓ Branch 1 taken 37 times.
|
38 | t->ti.last_frame_samples : |
91 | t->ti.frame_samples; | ||
92 | 38 | s->key_frame = !!(t->ti.flags & TAK_FRAME_FLAG_HAS_INFO); | |
93 | } else { | ||
94 | 37 | pc->frame_start_found = 0; | |
95 | 37 | next = t->index - pc->index; | |
96 | 37 | t->index = 0; | |
97 | 37 | goto found; | |
98 | } | ||
99 | } | ||
100 | } | ||
101 | } | ||
102 | } | ||
103 | 989 | found: | |
104 | |||
105 |
7/8✓ Branch 0 taken 1024 times.
✓ Branch 1 taken 2 times.
✓ Branch 2 taken 990 times.
✓ Branch 3 taken 34 times.
✓ Branch 4 taken 3 times.
✓ Branch 5 taken 987 times.
✗ Branch 6 not taken.
✓ Branch 7 taken 39 times.
|
1065 | if (consumed && !buf_size && next == END_NOT_FOUND || |
106 | 39 | ff_combine_frame(pc, next, &buf, &buf_size) < 0) { | |
107 | 987 | goto fail; | |
108 | } | ||
109 | |||
110 |
2/2✓ Branch 0 taken 37 times.
✓ Branch 1 taken 2 times.
|
39 | if (next != END_NOT_FOUND) { |
111 | 37 | next += consumed; | |
112 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 37 times.
|
37 | pc->overread = FFMAX(0, -next); |
113 | } | ||
114 | |||
115 | 39 | *poutbuf = buf; | |
116 | 39 | *poutbuf_size = buf_size; | |
117 | 39 | return next; | |
118 | |||
119 | 987 | fail: | |
120 | 987 | *poutbuf = NULL; | |
121 | 987 | *poutbuf_size = 0; | |
122 | 987 | return buf_size + consumed; | |
123 | } | ||
124 | |||
125 | const AVCodecParser ff_tak_parser = { | ||
126 | .codec_ids = { AV_CODEC_ID_TAK }, | ||
127 | .priv_data_size = sizeof(TAKParseContext), | ||
128 | .parser_parse = tak_parse, | ||
129 | .parser_close = ff_parse_close, | ||
130 | }; | ||
131 |