blob: 6dbbfd8a535df5d0f9486a829a35eb38fefb5fb1
1 | /* |
2 | * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> |
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 | * Cook audio parser |
24 | * |
25 | * Determines subpacket duration from extradata. |
26 | */ |
27 | |
28 | #include <stdint.h> |
29 | |
30 | #include "libavutil/intreadwrite.h" |
31 | #include "parser.h" |
32 | |
33 | typedef struct CookParseContext { |
34 | int duration; |
35 | } CookParseContext; |
36 | |
37 | static int cook_parse(AVCodecParserContext *s1, AVCodecContext *avctx, |
38 | const uint8_t **poutbuf, int *poutbuf_size, |
39 | const uint8_t *buf, int buf_size) |
40 | { |
41 | CookParseContext *s = s1->priv_data; |
42 | |
43 | if (!s->duration && |
44 | avctx->extradata && avctx->extradata_size >= 8 && avctx->channels) |
45 | s->duration = AV_RB16(avctx->extradata + 4) / avctx->channels; |
46 | |
47 | s1->duration = s->duration; |
48 | |
49 | /* always return the full packet. this parser isn't doing any splitting or |
50 | combining, only setting packet duration */ |
51 | *poutbuf = buf; |
52 | *poutbuf_size = buf_size; |
53 | return buf_size; |
54 | } |
55 | |
56 | AVCodecParser ff_cook_parser = { |
57 | .codec_ids = { AV_CODEC_ID_COOK }, |
58 | .priv_data_size = sizeof(CookParseContext), |
59 | .parser_parse = cook_parse, |
60 | }; |
61 |