FFmpeg
aac_parser.c
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1 /*
2  * Audio and Video frame extraction
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 #include "parser.h"
24 #include "aac_ac3_parser.h"
25 #include "adts_header.h"
26 #include "adts_parser.h"
27 #include "libavutil/intreadwrite.h"
28 
29 static int aac_sync(uint64_t state, int *need_next_header, int *new_frame_start)
30 {
31  uint8_t tmp[8 + AV_INPUT_BUFFER_PADDING_SIZE];
33  int size;
34 
35  AV_WB64(tmp, state);
36 
38  if (size < 0)
39  return 0;
40  *need_next_header = 0;
41  *new_frame_start = 1;
42  return size;
43 }
44 
46 {
48  s->header_size = AV_AAC_ADTS_HEADER_SIZE;
49  s->sync = aac_sync;
50  return 0;
51 }
52 
53 
56  .priv_data_size = sizeof(AACAC3ParseContext),
57  .parser_init = aac_parse_init,
58  .parser_parse = ff_aac_ac3_parse,
59  .parser_close = ff_parse_close,
60 };
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