FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/ftr_parser.c
Date: 2022-12-05 03:11:11
Exec Total Coverage
Lines: 0 36 0.0%
Functions: 0 1 0.0%
Branches: 0 18 0.0%

Line Branch Exec Source
1 /*
2 * FTR parser
3 * Copyright (c) 2022 Paul B Mahol
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 * FTR parser
25 */
26
27 #include "parser.h"
28 #include "get_bits.h"
29 #include "adts_header.h"
30 #include "adts_parser.h"
31 #include "mpeg4audio.h"
32
33 typedef struct FTRParseContext {
34 ParseContext pc;
35 int skip;
36 int split;
37 int frame_index;
38 } FTRParseContext;
39
40 static int ftr_parse(AVCodecParserContext *s, AVCodecContext *avctx,
41 const uint8_t **poutbuf, int *poutbuf_size,
42 const uint8_t *buf, int buf_size)
43 {
44 uint8_t tmp[8 + AV_INPUT_BUFFER_PADDING_SIZE];
45 FTRParseContext *ftr = s->priv_data;
46 uint64_t state = ftr->pc.state64;
47 int next = END_NOT_FOUND;
48 GetBitContext bits;
49 AACADTSHeaderInfo hdr;
50 int size;
51
52 *poutbuf_size = 0;
53 *poutbuf = NULL;
54
55 if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
56 next = buf_size;
57 } else {
58 for (int i = 0; i < buf_size; i++) {
59 if (ftr->skip > 0) {
60 ftr->skip--;
61 if (ftr->skip == 0 && ftr->split) {
62 ftr->split = 0;
63 next = i;
64 s->duration = 1024;
65 s->key_frame = 1;
66 break;
67 } else if (ftr->skip > 0) {
68 continue;
69 }
70 }
71
72 state = (state << 8) | buf[i];
73 AV_WB64(tmp, state);
74 init_get_bits(&bits, tmp + 8 - AV_AAC_ADTS_HEADER_SIZE,
75 AV_AAC_ADTS_HEADER_SIZE * 8);
76
77 if ((size = ff_adts_header_parse(&bits, &hdr)) > 0) {
78 ftr->skip = size - 6;
79 ftr->frame_index += ff_mpeg4audio_channels[hdr.chan_config];
80 if (ftr->frame_index >= avctx->ch_layout.nb_channels) {
81 ftr->frame_index = 0;
82 ftr->split = 1;
83 }
84 }
85 }
86
87 ftr->pc.state64 = state;
88
89 if (ff_combine_frame(&ftr->pc, next, &buf, &buf_size) < 0) {
90 *poutbuf = NULL;
91 *poutbuf_size = 0;
92 return buf_size;
93 }
94 }
95
96 *poutbuf = buf;
97 *poutbuf_size = buf_size;
98
99 return next;
100 }
101
102 const AVCodecParser ff_ftr_parser = {
103 .codec_ids = { AV_CODEC_ID_FTR },
104 .priv_data_size = sizeof(FTRParseContext),
105 .parser_parse = ftr_parse,
106 .parser_close = ff_parse_close,
107 };
108