2 * Audio and Video frame extraction
3 * Copyright (c) 2003 Fabrice Bellard
4 * Copyright (c) 2003 Michael Niedermayer
6 * This file is part of FFmpeg.
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.
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.
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
24 #include "aac_ac3_parser.h"
25 #include "aacadtsdec.h"
27 #include "mpeg4audio.h"
29 static int aac_sync(uint64_t state
, AACAC3ParseContext
*hdr_info
,
30 int *need_next_header
, int *new_frame_start
)
33 AACADTSHeaderInfo hdr
;
37 uint8_t u8
[8 + FF_INPUT_BUFFER_PADDING_SIZE
];
40 tmp
.u64
= av_be2ne64(state
);
41 init_get_bits(&bits
, tmp
.u8
+8-AAC_ADTS_HEADER_SIZE
, AAC_ADTS_HEADER_SIZE
* 8);
43 if ((size
= avpriv_aac_parse_header(&bits
, &hdr
)) < 0)
45 *need_next_header
= 0;
47 hdr_info
->sample_rate
= hdr
.sample_rate
;
48 hdr_info
->channels
= ff_mpeg4audio_channels
[hdr
.chan_config
];
49 hdr_info
->samples
= hdr
.samples
;
50 hdr_info
->bit_rate
= hdr
.bit_rate
;
54 static av_cold
int aac_parse_init(AVCodecParserContext
*s1
)
56 AACAC3ParseContext
*s
= s1
->priv_data
;
57 s
->header_size
= AAC_ADTS_HEADER_SIZE
;
63 AVCodecParser ff_aac_parser
= {
64 .codec_ids
= { AV_CODEC_ID_AAC
},
65 .priv_data_size
= sizeof(AACAC3ParseContext
),
66 .parser_init
= aac_parse_init
,
67 .parser_parse
= ff_aac_ac3_parse
,
68 .parser_close
= ff_parse_close
,