/* * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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) s1->duration = s->duration; else if (avctx->extradata && avctx->extradata_size >= 8 && avctx->channels) s->duration = AV_RB16(avctx->extradata + 4) / avctx->channels; /* 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; } AVCodecParser ff_cook_parser = { .codec_ids = { AV_CODEC_ID_COOK }, .priv_data_size = sizeof(CookParseContext), .parser_parse = cook_parse, };