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
21 #include "libavutil/channel_layout.h"
22 #include "avcodec.h"
23 #include "dolby_e.h"
24 #include "get_bits.h"
25 #include "put_bits.h"
26
27 typedef struct DBEParseContext {
28 DBEContext dectx;
29 } DBEParseContext;
30
dolby_e_parse(AVCodecParserContext * s2,AVCodecContext * avctx,const uint8_t ** poutbuf,int * poutbuf_size,const uint8_t * buf,int buf_size)31 static int dolby_e_parse(AVCodecParserContext *s2, AVCodecContext *avctx,
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:
45 avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_4POINT0;
46 break;
47 case 6:
48 avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1;
49 break;
50 case 8:
51 avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_7POINT1;
52 break;
53 default:
54 avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
55 avctx->ch_layout.nb_channels = s->metadata.nb_channels;
56 break;
57 }
58
59 avctx->sample_rate = s->metadata.sample_rate;
60 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
61
62 end:
63 /* always return the full packet. this parser isn't doing any splitting or
64 combining, only packet analysis */
65 *poutbuf = buf;
66 *poutbuf_size = buf_size;
67 return buf_size;
68 }
69
70 const AVCodecParser ff_dolby_e_parser = {
71 .codec_ids = { AV_CODEC_ID_DOLBY_E },
72 .priv_data_size = sizeof(DBEParseContext),
73 .parser_parse = dolby_e_parse,
74 };
75