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60 lines
1.8 KiB
60 lines
1.8 KiB
13 years ago
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/*
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* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Cook audio parser
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*
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* Determines subpacket duration from extradata.
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*/
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#include <stdint.h>
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#include "libavutil/intreadwrite.h"
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#include "parser.h"
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typedef struct CookParseContext {
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int duration;
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} CookParseContext;
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static int cook_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
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const uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size)
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{
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CookParseContext *s = s1->priv_data;
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if (s->duration)
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s1->duration = s->duration;
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else if (avctx->extradata && avctx->extradata_size >= 8 && avctx->channels)
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s->duration = AV_RB16(avctx->extradata + 4) / avctx->channels;
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/* always return the full packet. this parser isn't doing any splitting or
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combining, only setting packet duration */
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*poutbuf = buf;
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*poutbuf_size = buf_size;
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return buf_size;
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}
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AVCodecParser ff_cook_parser = {
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.codec_ids = { CODEC_ID_COOK },
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.priv_data_size = sizeof(CookParseContext),
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.parser_parse = cook_parse,
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};
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