FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/misc4_parser.c
Date: 2022-10-02 18:56:10
Exec Total Coverage
Lines: 0 29 0.0%
Branches: 0 13 0.0%

Line Branch Exec Source
1 /*
2 * Micronas SC-4 parser
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "parser.h"
22
23 typedef struct MISC4Context {
24 ParseContext pc;
25 } MISC4Context;
26
27 static int misc4_parse(AVCodecParserContext *s, AVCodecContext *avctx,
28 const uint8_t **poutbuf, int *poutbuf_size,
29 const uint8_t *buf, int buf_size)
30 {
31 MISC4Context *ctx = s->priv_data;
32 uint32_t state = ctx->pc.state;
33 int next = END_NOT_FOUND, i = 0;
34
35 *poutbuf_size = 0;
36 *poutbuf = NULL;
37
38 if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
39 next = buf_size;
40 } else {
41 uint32_t marker = 0;
42
43 switch (avctx->sample_rate) {
44 case 8000:
45 case 11025:
46 marker = 0x11b;
47 break;
48 case 16000:
49 case 32000:
50 marker = 0x2b2;
51 break;
52 }
53
54 for (; i < buf_size; i++) {
55 state = (state << 8) | buf[i];
56 if (state == marker && i > 3) {
57 next = i - 3;
58 break;
59 }
60 }
61
62 ctx->pc.state = state;
63 if (ff_combine_frame(&ctx->pc, next, &buf, &buf_size) < 0) {
64 *poutbuf = NULL;
65 *poutbuf_size = 0;
66 return buf_size;
67 }
68 }
69
70 *poutbuf = buf;
71 *poutbuf_size = buf_size;
72
73 return next;
74 }
75
76 const AVCodecParser ff_misc4_parser = {
77 .codec_ids = { AV_CODEC_ID_MISC4 },
78 .priv_data_size = sizeof(MISC4Context),
79 .parser_parse = misc4_parse,
80 .parser_close = ff_parse_close,
81 };
82