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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2012 Justin Ruggles |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | * @file |
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| 23 | * Cook audio parser |
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| 24 | * |
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| 25 | * Determines subpacket duration from extradata. |
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| 26 | */ |
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| 27 | |||
| 28 | #include |
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| 29 | |||
| 30 | #include "libavutil/intreadwrite.h" |
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| 31 | #include "parser.h" |
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| 32 | |||
| 33 | typedef struct CookParseContext { |
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| 34 | int duration; |
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| 35 | } CookParseContext; |
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| 36 | |||
| 37 | static int cook_parse(AVCodecParserContext *s1, AVCodecContext *avctx, |
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| 38 | const uint8_t **poutbuf, int *poutbuf_size, |
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| 39 | const uint8_t *buf, int buf_size) |
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| 40 | { |
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| 41 | CookParseContext *s = s1->priv_data; |
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| 42 | |||
| 43 | if (s->duration) |
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| 44 | s1->duration = s->duration; |
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| 45 | else if (avctx->extradata && avctx->extradata_size >= 8 && avctx->channels) |
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| 46 | s->duration = AV_RB16(avctx->extradata + 4) / avctx->channels; |
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| 47 | |||
| 48 | /* always return the full packet. this parser isn't doing any splitting or |
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| 49 | combining, only setting packet duration */ |
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| 50 | *poutbuf = buf; |
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| 51 | *poutbuf_size = buf_size; |
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| 52 | return buf_size; |
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| 53 | } |
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| 54 | |||
| 55 | AVCodecParser ff_cook_parser = { |
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| 56 | .codec_ids = { AV_CODEC_ID_COOK }, |
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| 57 | .priv_data_size = sizeof(CookParseContext), |
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| 58 | .parser_parse = cook_parse, |
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| 59 | }; |