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