FFmpeg
dolby_e_parser.c
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1 /*
2  * Copyright (C) 2017 foo86
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
22 #include "avcodec.h"
23 #include "dolby_e.h"
24 #include "get_bits.h"
25 #include "put_bits.h"
26 
27 typedef struct DBEParseContext {
30 
32  const uint8_t **poutbuf, int *poutbuf_size,
33  const uint8_t *buf, int buf_size)
34 {
35  DBEParseContext *s1 = s2->priv_data;
36  DBEContext *s = &s1->dectx;
37  int ret;
38 
39  if ((ret = ff_dolby_e_parse_header(s, buf, buf_size)) < 0)
40  goto end;
41 
42  s2->duration = FRAME_SAMPLES;
43  switch (s->metadata.nb_channels) {
44  case 4:
46  break;
47  case 6:
49  break;
50  case 8:
52  break;
53  }
54 
55  avctx->channels = s->metadata.nb_channels;
56  avctx->sample_rate = s->metadata.sample_rate;
58 
59 end:
60  /* always return the full packet. this parser isn't doing any splitting or
61  combining, only packet analysis */
62  *poutbuf = buf;
63  *poutbuf_size = buf_size;
64  return buf_size;
65 }
66 
69  .priv_data_size = sizeof(DBEParseContext),
70  .parser_parse = dolby_e_parse,
71 };
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
AVCodecContext::channel_layout
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1043
ff_dolby_e_parser
const AVCodecParser ff_dolby_e_parser
Definition: dolby_e_parser.c:67
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:992
ff_dolby_e_parse_header
int ff_dolby_e_parse_header(DBEContext *s, const uint8_t *buf, int buf_size)
Initialize DBEContext and parse Dolby E metadata.
Definition: dolby_e_parse.c:97
FRAME_SAMPLES
#define FRAME_SAMPLES
Definition: dolby_e.h:27
DBEContext
Definition: dolby_e.h:70
s
#define s(width, name)
Definition: cbs_vp9.c:257
s1
#define s1
Definition: regdef.h:38
get_bits.h
AV_CODEC_ID_DOLBY_E
@ AV_CODEC_ID_DOLBY_E
Definition: codec_id.h:507
AV_CH_LAYOUT_5POINT1
#define AV_CH_LAYOUT_5POINT1
Definition: channel_layout.h:101
s2
#define s2
Definition: regdef.h:39
AVCodecParser::codec_ids
int codec_ids[7]
Definition: avcodec.h:2935
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1000
AVCodecContext::channels
int channels
number of audio channels
Definition: avcodec.h:993
AV_CH_LAYOUT_7POINT1
#define AV_CH_LAYOUT_7POINT1
Definition: channel_layout.h:112
avcodec.h
AVCodecParserContext
Definition: avcodec.h:2775
ret
ret
Definition: filter_design.txt:187
AVCodecContext
main external API structure.
Definition: avcodec.h:383
channel_layout.h
dolby_e_parse
static int dolby_e_parse(AVCodecParserContext *s2, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)
Definition: dolby_e_parser.c:31
AVCodecParser
Definition: avcodec.h:2934
AV_CH_LAYOUT_4POINT0
#define AV_CH_LAYOUT_4POINT0
Definition: channel_layout.h:96
dolby_e.h
DBEParseContext::dectx
DBEContext dectx
Definition: dolby_e_parser.c:28
put_bits.h
DBEParseContext
Definition: dolby_e_parser.c:27