libavcodec/aac_ac3_parser.h

   1 /*
   2  * Common AAC and AC-3 parser prototypes
   3  * Copyright (c) 2003 Fabrice Bellard
   4  * Copyright (c) 2003 Michael Niedermayer
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #ifndef AVCODEC_AAC_AC3_PARSER_H
  24 #define AVCODEC_AAC_AC3_PARSER_H
  25
  26 #include <stdint.h>
  27 #include "avcodec.h"
  28 #include "parser.h"
  29
  30 typedef enum {
  31     AAC_AC3_PARSE_ERROR_SYNC        = -1,
  32     AAC_AC3_PARSE_ERROR_BSID        = -2,
  33     AAC_AC3_PARSE_ERROR_SAMPLE_RATE = -3,
  34     AAC_AC3_PARSE_ERROR_FRAME_SIZE  = -4,
  35     AAC_AC3_PARSE_ERROR_FRAME_TYPE  = -5,
  36     AAC_AC3_PARSE_ERROR_CRC         = -6,
  37     AAC_AC3_PARSE_ERROR_CHANNEL_CFG = -7,
  38 } AACAC3ParseError;
  39
  40 typedef struct AACAC3ParseContext {
  41     ParseContext pc;
  42     int frame_size;
  43     int header_size;
  44     int (*sync)(uint64_t state, struct AACAC3ParseContext *hdr_info,
  45             int *need_next_header, int *new_frame_start);
  46
  47     int channels;
  48     int sample_rate;
  49     int bit_rate;
  50     int samples;
  51     int64_t channel_layout;
  52
  53     int remaining_size;
  54     uint64_t state;
  55
  56     int need_next_header;
  57     enum CodecID codec_id;
  58 } AACAC3ParseContext;
  59
  60 int ff_aac_ac3_parse(AVCodecParserContext *s1,
  61                      AVCodecContext *avctx,
  62                      const uint8_t **poutbuf, int *poutbuf_size,
  63                      const uint8_t *buf, int buf_size);
  64
  65 #endif /* AVCODEC_AAC_AC3_PARSER_H */