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  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        = -0x1030c0a,
  32.     AAC_AC3_PARSE_ERROR_BSID        = -0x2030c0a,
  33.     AAC_AC3_PARSE_ERROR_SAMPLE_RATE = -0x3030c0a,
  34.     AAC_AC3_PARSE_ERROR_FRAME_SIZE  = -0x4030c0a,
  35.     AAC_AC3_PARSE_ERROR_FRAME_TYPE  = -0x5030c0a,
  36.     AAC_AC3_PARSE_ERROR_CRC         = -0x6030c0a,
  37.     AAC_AC3_PARSE_ERROR_CHANNEL_CFG = -0x7030c0a,
  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.     uint64_t channel_layout;
  52.     int service_type;
  53.  
  54.     int remaining_size;
  55.     uint64_t state;
  56.  
  57.     int need_next_header;
  58.     enum AVCodecID codec_id;
  59. } AACAC3ParseContext;
  60.  
  61. int ff_aac_ac3_parse(AVCodecParserContext *s1,
  62.                      AVCodecContext *avctx,
  63.                      const uint8_t **poutbuf, int *poutbuf_size,
  64.                      const uint8_t *buf, int buf_size);
  65.  
  66. #endif /* AVCODEC_AAC_AC3_PARSER_H */
  67.