/* * Audio and Video frame extraction * Copyright (c) 2003 Fabrice Bellard * Copyright (c) 2003 Michael Niedermayer * * 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 */ #include "parser.h"#include "aac_ac3_parser.h"#include "adts_header.h"#include "adts_parser.h"#include "libavutil/intreadwrite.h" static int aac_sync(uint64_t state, int *need_next_header, int *new_frame_start){    uint8_t tmp[8 + AV_INPUT_BUFFER_PADDING_SIZE];    AACADTSHeaderInfo hdr;    int size;     AV_WB64(tmp, state);     size = ff_adts_header_parse_buf(tmp + 8 - AV_AAC_ADTS_HEADER_SIZE, &hdr);    if (size < 0)        return 0;    *need_next_header = 0;    *new_frame_start  = 1;    return size;} static av_cold int aac_parse_init(AVCodecParserContext *s1){    AACAC3ParseContext *s = s1->priv_data;    s->header_size = AV_AAC_ADTS_HEADER_SIZE;    s->sync = aac_sync;    return 0;}  const AVCodecParser ff_aac_parser = {    .codec_ids      = { AV_CODEC_ID_AAC },    .priv_data_size = sizeof(AACAC3ParseContext),    .parser_init    = aac_parse_init,    .parser_parse   = ff_aac_ac3_parse,    .parser_close   = ff_parse_close,};