FFmpeg
libavcodec
aac_parser.c
Go to the documentation of this file.
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/*
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* Audio and Video frame extraction
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* Copyright (c) 2003 Fabrice Bellard
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* Copyright (c) 2003 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "
parser.h
"
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#include "
aac_ac3_parser.h
"
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#include "
adts_header.h
"
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#include "
adts_parser.h
"
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#include "
libavutil/intreadwrite.h
"
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static
int
aac_sync
(uint64_t
state
,
int
*need_next_header,
int
*new_frame_start)
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{
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uint8_t
tmp
[8 +
AV_INPUT_BUFFER_PADDING_SIZE
];
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AACADTSHeaderInfo
hdr;
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int
size
;
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AV_WB64
(
tmp
,
state
);
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size
=
ff_adts_header_parse_buf
(
tmp
+ 8 -
AV_AAC_ADTS_HEADER_SIZE
, &hdr);
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if
(
size
< 0)
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return
0;
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*need_next_header = 0;
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*new_frame_start = 1;
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return
size
;
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}
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static
av_cold
int
aac_parse_init
(
AVCodecParserContext
*s1)
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{
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AACAC3ParseContext
*
s
= s1->
priv_data
;
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s
->header_size =
AV_AAC_ADTS_HEADER_SIZE
;
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s
->sync =
aac_sync
;
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return
0;
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}
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const
AVCodecParser
ff_aac_parser
= {
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.
codec_ids
= {
AV_CODEC_ID_AAC
},
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.priv_data_size =
sizeof
(
AACAC3ParseContext
),
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.parser_init =
aac_parse_init
,
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.parser_parse =
ff_aac_ac3_parse
,
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.parser_close =
ff_parse_close
,
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};
aac_sync
static int aac_sync(uint64_t state, int *need_next_header, int *new_frame_start)
Definition:
aac_parser.c:29
ff_aac_parser
const AVCodecParser ff_aac_parser
Definition:
aac_parser.c:54
AV_AAC_ADTS_HEADER_SIZE
#define AV_AAC_ADTS_HEADER_SIZE
Definition:
adts_parser.h:25
aac_ac3_parser.h
tmp
static uint8_t tmp[11]
Definition:
aes_ctr.c:28
ff_parse_close
void ff_parse_close(AVCodecParserContext *s)
Definition:
parser.c:290
AV_WB64
#define AV_WB64(p, v)
Definition:
intreadwrite.h:429
av_cold
#define av_cold
Definition:
attributes.h:90
ff_adts_header_parse_buf
int ff_adts_header_parse_buf(const uint8_t buf[AV_AAC_ADTS_HEADER_SIZE+AV_INPUT_BUFFER_PADDING_SIZE], AACADTSHeaderInfo *hdr)
Wrapper around ff_adts_header_parse() for users that don't already have a suitable GetBitContext.
Definition:
adts_header.c:76
intreadwrite.h
s
#define s(width, name)
Definition:
cbs_vp9.c:198
ff_aac_ac3_parse
int ff_aac_ac3_parse(AVCodecParserContext *s1, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)
Definition:
aac_ac3_parser.c:32
state
static struct @466 state
AACAC3ParseContext
Definition:
aac_ac3_parser.h:31
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition:
codec_id.h:448
AVCodecParser::codec_ids
int codec_ids[7]
Definition:
avcodec.h:2908
size
int size
Definition:
twinvq_data.h:10344
parser.h
AVCodecParserContext
Definition:
avcodec.h:2748
adts_parser.h
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition:
defs.h:40
aac_parse_init
static av_cold int aac_parse_init(AVCodecParserContext *s1)
Definition:
aac_parser.c:45
adts_header.h
AVCodecParser
Definition:
avcodec.h:2907
AVCodecParserContext::priv_data
void * priv_data
Definition:
avcodec.h:2749
AACADTSHeaderInfo
Definition:
adts_header.h:35
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