FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/gsm_parser.c
Date: 2021-09-22 23:55:11
Exec Total Coverage
Lines: 25 31 80.6%
Branches: 10 15 66.7%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2012 Justin Ruggles
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 /**
22 * @file
23 * GSM audio parser
24 *
25 * Splits packets into individual blocks.
26 */
27
28 #include "libavutil/avassert.h"
29 #include "parser.h"
30 #include "gsm.h"
31
32 typedef struct GSMParseContext {
33 ParseContext pc;
34 int block_size;
35 int duration;
36 int remaining;
37 } GSMParseContext;
38
39 90 static int gsm_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
40 const uint8_t **poutbuf, int *poutbuf_size,
41 const uint8_t *buf, int buf_size)
42 {
43 90 GSMParseContext *s = s1->priv_data;
44 90 ParseContext *pc = &s->pc;
45 int next;
46
47
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90 if (!s->block_size) {
48
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1 switch (avctx->codec_id) {
49 case AV_CODEC_ID_GSM:
50 s->block_size = GSM_BLOCK_SIZE;
51 s->duration = GSM_FRAME_SIZE;
52 break;
53 1 case AV_CODEC_ID_GSM_MS:
54 2 s->block_size = avctx->block_align ? avctx->block_align
55
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1 : GSM_MS_BLOCK_SIZE;
56 1 s->duration = GSM_FRAME_SIZE * 2;
57 1 break;
58 default:
59 av_assert0(0);
60 }
61 }
62
63
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90 if (!s->remaining)
64 90 s->remaining = s->block_size;
65
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90 if (s->remaining <= buf_size) {
66 89 next = s->remaining;
67 89 s->remaining = 0;
68 } else {
69 1 next = END_NOT_FOUND;
70 1 s->remaining -= buf_size;
71 }
72
73
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90 if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) {
74 1 *poutbuf = NULL;
75 1 *poutbuf_size = 0;
76 1 return buf_size;
77 }
78
79 89 s1->duration = s->duration;
80
81 89 *poutbuf = buf;
82 89 *poutbuf_size = buf_size;
83 89 return next;
84 }
85
86 const AVCodecParser ff_gsm_parser = {
87 .codec_ids = { AV_CODEC_ID_GSM, AV_CODEC_ID_GSM_MS },
88 .priv_data_size = sizeof(GSMParseContext),
89 .parser_parse = gsm_parse,
90 .parser_close = ff_parse_close,
91 };
92