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
27typedef struct DBEParseContext {
28    DBEContext dectx;
29} DBEParseContext;
30
31static 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
62end:
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
70const 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