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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 "aacadtsdec.h"
26 #include "get_bits.h"
27 #include "mpeg4audio.h"
28 
29 static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info,
30  int *need_next_header, int *new_frame_start)
31 {
34  int size;
35  union {
36  uint64_t u64;
38  } tmp;
39 
40  tmp.u64 = av_be2ne64(state);
42 
43  if ((size = avpriv_aac_parse_header(&bits, &hdr)) < 0)
44  return 0;
45  *need_next_header = 0;
46  *new_frame_start = 1;
47  hdr_info->sample_rate = hdr.sample_rate;
49  hdr_info->samples = hdr.samples;
50  hdr_info->bit_rate = hdr.bit_rate;
51  return size;
52 }
53 
55 {
58  s->sync = aac_sync;
59  return 0;
60 }
61 
62 
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,
69 };
const char * s
Definition: avisynth_c.h:631
int codec_ids[5]
Definition: avcodec.h:5071
uint8_t bits
Definition: crc.c:296
uint8_t
#define av_cold
Definition: attributes.h:82
int(* sync)(uint64_t state, struct AACAC3ParseContext *hdr_info, int *need_next_header, int *new_frame_start)
bitstream reader API header.
ptrdiff_t size
Definition: opengl_enc.c:101
#define av_be2ne64(x)
Definition: bswap.h:94
uint8_t chan_config
Definition: aacadtsdec.h:38
void ff_parse_close(AVCodecParserContext *s)
Definition: parser.c:321
static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info, int *need_next_header, int *new_frame_start)
Definition: aac_parser.c:29
static av_cold int aac_parse_init(AVCodecParserContext *s1)
Definition: aac_parser.c:54
uint32_t samples
Definition: aacadtsdec.h:33
#define AAC_ADTS_HEADER_SIZE
Definition: aacadtsdec.h:29
static struct @211 state
int avpriv_aac_parse_header(GetBitContext *gbc, AACADTSHeaderInfo *hdr)
Parse AAC frame header.
Definition: aacadtsdec.c:29
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418
#define s1
Definition: regdef.h:38
uint32_t bit_rate
Definition: aacadtsdec.h:34
int ff_aac_ac3_parse(AVCodecParserContext *s1, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:725
AVCodecParser ff_aac_parser
Definition: aac_parser.c:63
const uint8_t ff_mpeg4audio_channels[8]
Definition: mpeg4audio.c:62
uint32_t sample_rate
Definition: aacadtsdec.h:32