FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/ftr_parser.c
Date: 2024-07-17 14:05:47
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 "adts_header.h"
29 #include "adts_parser.h"
30 #include "mpeg4audio.h"
31
32 typedef struct FTRParseContext {
33 ParseContext pc;
34 int skip;
35 int split;
36 int frame_index;
37 } FTRParseContext;
38
39 static int ftr_parse(AVCodecParserContext *s, AVCodecContext *avctx,
40 const uint8_t **poutbuf, int *poutbuf_size,
41 const uint8_t *buf, int buf_size)
42 {
43 uint8_t tmp[8 + AV_INPUT_BUFFER_PADDING_SIZE];
44 FTRParseContext *ftr = s->priv_data;
45 uint64_t state = ftr->pc.state64;
46 int next = END_NOT_FOUND;
47 AACADTSHeaderInfo hdr;
48 int size;
49
50 *poutbuf_size = 0;
51 *poutbuf = NULL;
52
53 if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
54 next = buf_size;
55 } else {
56 for (int i = 0; i < buf_size; i++) {
57 if (ftr->skip > 0) {
58 ftr->skip--;
59 if (ftr->skip == 0 && ftr->split) {
60 ftr->split = 0;
61 next = i;
62 s->duration = 1024;
63 s->key_frame = 1;
64 break;
65 } else if (ftr->skip > 0) {
66 continue;
67 }
68 }
69
70 state = (state << 8) | buf[i];
71 AV_WB64(tmp, state);
72 size = ff_adts_header_parse_buf(tmp + 8 - AV_AAC_ADTS_HEADER_SIZE, &hdr);
73
74 if (size > 0) {
75 ftr->skip = size - 6;
76 ftr->frame_index += ff_mpeg4audio_channels[hdr.chan_config];
77 if (ftr->frame_index >= avctx->ch_layout.nb_channels) {
78 ftr->frame_index = 0;
79 ftr->split = 1;
80 }
81 }
82 }
83
84 ftr->pc.state64 = state;
85
86 if (ff_combine_frame(&ftr->pc, next, &buf, &buf_size) < 0) {
87 *poutbuf = NULL;
88 *poutbuf_size = 0;
89 return buf_size;
90 }
91 }
92
93 *poutbuf = buf;
94 *poutbuf_size = buf_size;
95
96 return next;
97 }
98
99 const AVCodecParser ff_ftr_parser = {
100 .codec_ids = { AV_CODEC_ID_FTR },
101 .priv_data_size = sizeof(FTRParseContext),
102 .parser_parse = ftr_parse,
103 .parser_close = ff_parse_close,
104 };
105