xref: /third_party/ffmpeg/libavformat/sdr2.c (revision cabdff1a)
1cabdff1aSopenharmony_ci/*
2cabdff1aSopenharmony_ci * SDR2 demuxer
3cabdff1aSopenharmony_ci * Copyright (c) 2014 Paul B Mahol
4cabdff1aSopenharmony_ci *
5cabdff1aSopenharmony_ci * This file is part of FFmpeg.
6cabdff1aSopenharmony_ci *
7cabdff1aSopenharmony_ci * FFmpeg is free software; you can redistribute it and/or
8cabdff1aSopenharmony_ci * modify it under the terms of the GNU Lesser General Public
9cabdff1aSopenharmony_ci * License as published by the Free Software Foundation; either
10cabdff1aSopenharmony_ci * version 2.1 of the License, or (at your option) any later version.
11cabdff1aSopenharmony_ci *
12cabdff1aSopenharmony_ci * FFmpeg is distributed in the hope that it will be useful,
13cabdff1aSopenharmony_ci * but WITHOUT ANY WARRANTY; without even the implied warranty of
14cabdff1aSopenharmony_ci * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15cabdff1aSopenharmony_ci * Lesser General Public License for more details.
16cabdff1aSopenharmony_ci *
17cabdff1aSopenharmony_ci * You should have received a copy of the GNU Lesser General Public
18cabdff1aSopenharmony_ci * License along with FFmpeg; if not, write to the Free Software
19cabdff1aSopenharmony_ci * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20cabdff1aSopenharmony_ci */
21cabdff1aSopenharmony_ci
22cabdff1aSopenharmony_ci#include "libavutil/intreadwrite.h"
23cabdff1aSopenharmony_ci#include "avformat.h"
24cabdff1aSopenharmony_ci#include "internal.h"
25cabdff1aSopenharmony_ci
26cabdff1aSopenharmony_cistatic int sdr2_probe(const AVProbeData *p)
27cabdff1aSopenharmony_ci{
28cabdff1aSopenharmony_ci    if (AV_RL32(p->buf) != MKTAG('S', 'R', 'A', 1))
29cabdff1aSopenharmony_ci        return 0;
30cabdff1aSopenharmony_ci
31cabdff1aSopenharmony_ci    return AVPROBE_SCORE_EXTENSION;
32cabdff1aSopenharmony_ci}
33cabdff1aSopenharmony_ci
34cabdff1aSopenharmony_ci#define FIRST 0xA8
35cabdff1aSopenharmony_ci
36cabdff1aSopenharmony_cistatic int sdr2_read_header(AVFormatContext *s)
37cabdff1aSopenharmony_ci{
38cabdff1aSopenharmony_ci    AVStream *st, *ast;
39cabdff1aSopenharmony_ci
40cabdff1aSopenharmony_ci    ast = avformat_new_stream(s, 0);
41cabdff1aSopenharmony_ci    if (!ast)
42cabdff1aSopenharmony_ci        return AVERROR(ENOMEM);
43cabdff1aSopenharmony_ci
44cabdff1aSopenharmony_ci    st = avformat_new_stream(s, 0);
45cabdff1aSopenharmony_ci    if (!st)
46cabdff1aSopenharmony_ci        return AVERROR(ENOMEM);
47cabdff1aSopenharmony_ci
48cabdff1aSopenharmony_ci    avio_skip(s->pb, 20);
49cabdff1aSopenharmony_ci    avpriv_set_pts_info(st, 64, 1, avio_rl32(s->pb));
50cabdff1aSopenharmony_ci    st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
51cabdff1aSopenharmony_ci    st->codecpar->width      = avio_rl32(s->pb);
52cabdff1aSopenharmony_ci    st->codecpar->height     = avio_rl32(s->pb);
53cabdff1aSopenharmony_ci    st->codecpar->codec_id   = AV_CODEC_ID_H264;
54cabdff1aSopenharmony_ci    ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL;
55cabdff1aSopenharmony_ci
56cabdff1aSopenharmony_ci    ast->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
57cabdff1aSopenharmony_ci    ast->codecpar->ch_layout.nb_channels = 1;
58cabdff1aSopenharmony_ci    ast->codecpar->sample_rate = 8000;
59cabdff1aSopenharmony_ci    ast->codecpar->codec_id    = AV_CODEC_ID_PCM_S16LE;
60cabdff1aSopenharmony_ci    avpriv_set_pts_info(ast, 64, 1, 8000);
61cabdff1aSopenharmony_ci
62cabdff1aSopenharmony_ci    avio_seek(s->pb, FIRST, SEEK_SET);
63cabdff1aSopenharmony_ci
64cabdff1aSopenharmony_ci    return 0;
65cabdff1aSopenharmony_ci}
66cabdff1aSopenharmony_ci
67cabdff1aSopenharmony_cistatic const uint8_t header[24] = {
68cabdff1aSopenharmony_ci    0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1e,
69cabdff1aSopenharmony_ci    0xa6, 0x80, 0xb0, 0x7e, 0x40, 0x00, 0x00, 0x00,
70cabdff1aSopenharmony_ci    0x01, 0x68, 0xce, 0x38, 0x80, 0x00, 0x00, 0x00
71cabdff1aSopenharmony_ci};
72cabdff1aSopenharmony_ci
73cabdff1aSopenharmony_cistatic int sdr2_read_packet(AVFormatContext *s, AVPacket *pkt)
74cabdff1aSopenharmony_ci{
75cabdff1aSopenharmony_ci    int64_t pos;
76cabdff1aSopenharmony_ci    unsigned next;
77cabdff1aSopenharmony_ci    int flags, ret = 0, is_video;
78cabdff1aSopenharmony_ci
79cabdff1aSopenharmony_ci    pos = avio_tell(s->pb);
80cabdff1aSopenharmony_ci
81cabdff1aSopenharmony_ci    flags = avio_rl32(s->pb);
82cabdff1aSopenharmony_ci    avio_skip(s->pb, 4);
83cabdff1aSopenharmony_ci
84cabdff1aSopenharmony_ci    next = avio_rl32(s->pb);
85cabdff1aSopenharmony_ci    if (next <= 52)
86cabdff1aSopenharmony_ci        return AVERROR_INVALIDDATA;
87cabdff1aSopenharmony_ci
88cabdff1aSopenharmony_ci    avio_skip(s->pb, 6);
89cabdff1aSopenharmony_ci    is_video = avio_rl32(s->pb);
90cabdff1aSopenharmony_ci    avio_skip(s->pb, 30);
91cabdff1aSopenharmony_ci
92cabdff1aSopenharmony_ci    if (pos == FIRST) {
93cabdff1aSopenharmony_ci        if ((ret = av_new_packet(pkt, next - 52 + 24)) < 0)
94cabdff1aSopenharmony_ci            return ret;
95cabdff1aSopenharmony_ci        memcpy(pkt->data, header, 24);
96cabdff1aSopenharmony_ci        ret = avio_read(s->pb, pkt->data + 24, next - 52);
97cabdff1aSopenharmony_ci        if (ret < 0) {
98cabdff1aSopenharmony_ci            return ret;
99cabdff1aSopenharmony_ci        }
100cabdff1aSopenharmony_ci        av_shrink_packet(pkt, ret + 24);
101cabdff1aSopenharmony_ci    } else {
102cabdff1aSopenharmony_ci        ret = av_get_packet(s->pb, pkt, next - 52);
103cabdff1aSopenharmony_ci    }
104cabdff1aSopenharmony_ci    pkt->stream_index = !!is_video;
105cabdff1aSopenharmony_ci    pkt->pos = pos;
106cabdff1aSopenharmony_ci    if (flags & (1 << 12))
107cabdff1aSopenharmony_ci        pkt->flags |= AV_PKT_FLAG_KEY;
108cabdff1aSopenharmony_ci
109cabdff1aSopenharmony_ci    return ret;
110cabdff1aSopenharmony_ci}
111cabdff1aSopenharmony_ci
112cabdff1aSopenharmony_ciconst AVInputFormat ff_sdr2_demuxer = {
113cabdff1aSopenharmony_ci    .name        = "sdr2",
114cabdff1aSopenharmony_ci    .long_name   = NULL_IF_CONFIG_SMALL("SDR2"),
115cabdff1aSopenharmony_ci    .read_probe  = sdr2_probe,
116cabdff1aSopenharmony_ci    .read_header = sdr2_read_header,
117cabdff1aSopenharmony_ci    .read_packet = sdr2_read_packet,
118cabdff1aSopenharmony_ci    .extensions  = "sdr2",
119cabdff1aSopenharmony_ci    .flags       = AVFMT_GENERIC_INDEX,
120cabdff1aSopenharmony_ci};
121