/src/ffmpeg/libavformat/sdr2.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * SDR2 demuxer |
3 | | * Copyright (c) 2014 Paul B Mahol |
4 | | * |
5 | | * This file is part of FFmpeg. |
6 | | * |
7 | | * FFmpeg is free software; you can redistribute it and/or |
8 | | * modify it under the terms of the GNU Lesser General Public |
9 | | * License as published by the Free Software Foundation; either |
10 | | * version 2.1 of the License, or (at your option) any later version. |
11 | | * |
12 | | * FFmpeg is distributed in the hope that it will be useful, |
13 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | | * Lesser General Public License for more details. |
16 | | * |
17 | | * You should have received a copy of the GNU Lesser General Public |
18 | | * License along with FFmpeg; if not, write to the Free Software |
19 | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | | */ |
21 | | |
22 | | #include "libavutil/intreadwrite.h" |
23 | | #include "avformat.h" |
24 | | #include "demux.h" |
25 | | #include "internal.h" |
26 | | |
27 | | static int sdr2_probe(const AVProbeData *p) |
28 | 358k | { |
29 | 358k | if (AV_RL32(p->buf) != MKTAG('S', 'R', 'A', 1)) |
30 | 358k | return 0; |
31 | | |
32 | 348 | return AVPROBE_SCORE_EXTENSION; |
33 | 358k | } |
34 | | |
35 | 242k | #define FIRST 0xA8 |
36 | | |
37 | | static int sdr2_read_header(AVFormatContext *s) |
38 | 5.89k | { |
39 | 5.89k | AVStream *st, *ast; |
40 | | |
41 | 5.89k | ast = avformat_new_stream(s, 0); |
42 | 5.89k | if (!ast) |
43 | 0 | return AVERROR(ENOMEM); |
44 | | |
45 | 5.89k | st = avformat_new_stream(s, 0); |
46 | 5.89k | if (!st) |
47 | 0 | return AVERROR(ENOMEM); |
48 | | |
49 | 5.89k | avio_skip(s->pb, 20); |
50 | 5.89k | avpriv_set_pts_info(st, 64, 1, avio_rl32(s->pb)); |
51 | 5.89k | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
52 | 5.89k | st->codecpar->width = avio_rl32(s->pb); |
53 | 5.89k | st->codecpar->height = avio_rl32(s->pb); |
54 | 5.89k | st->codecpar->codec_id = AV_CODEC_ID_H264; |
55 | 5.89k | ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL; |
56 | | |
57 | 5.89k | ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
58 | 5.89k | ast->codecpar->ch_layout.nb_channels = 1; |
59 | 5.89k | ast->codecpar->sample_rate = 8000; |
60 | 5.89k | ast->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; |
61 | 5.89k | avpriv_set_pts_info(ast, 64, 1, 8000); |
62 | | |
63 | 5.89k | avio_seek(s->pb, FIRST, SEEK_SET); |
64 | | |
65 | 5.89k | return 0; |
66 | 5.89k | } |
67 | | |
68 | | static const uint8_t header[24] = { |
69 | | 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1e, |
70 | | 0xa6, 0x80, 0xb0, 0x7e, 0x40, 0x00, 0x00, 0x00, |
71 | | 0x01, 0x68, 0xce, 0x38, 0x80, 0x00, 0x00, 0x00 |
72 | | }; |
73 | | |
74 | | static int sdr2_read_packet(AVFormatContext *s, AVPacket *pkt) |
75 | 246k | { |
76 | 246k | int64_t pos; |
77 | 246k | unsigned next; |
78 | 246k | int flags, ret = 0, is_video; |
79 | | |
80 | 246k | pos = avio_tell(s->pb); |
81 | | |
82 | 246k | flags = avio_rl32(s->pb); |
83 | 246k | avio_skip(s->pb, 4); |
84 | | |
85 | 246k | next = avio_rl32(s->pb); |
86 | 246k | if (next <= 52) |
87 | 10.6k | return AVERROR_INVALIDDATA; |
88 | | |
89 | 236k | avio_skip(s->pb, 6); |
90 | 236k | is_video = avio_rl32(s->pb); |
91 | 236k | avio_skip(s->pb, 30); |
92 | | |
93 | 236k | if (pos == FIRST) { |
94 | 1.23k | if ((ret = av_new_packet(pkt, next - 52 + 24)) < 0) |
95 | 301 | return ret; |
96 | 935 | memcpy(pkt->data, header, 24); |
97 | 935 | ret = avio_read(s->pb, pkt->data + 24, next - 52); |
98 | 935 | if (ret < 0) { |
99 | 66 | return ret; |
100 | 66 | } |
101 | 869 | av_shrink_packet(pkt, ret + 24); |
102 | 234k | } else { |
103 | 234k | ret = av_get_packet(s->pb, pkt, next - 52); |
104 | 234k | } |
105 | 235k | pkt->stream_index = !!is_video; |
106 | 235k | pkt->pos = pos; |
107 | 235k | if (flags & (1 << 12)) |
108 | 7.28k | pkt->flags |= AV_PKT_FLAG_KEY; |
109 | | |
110 | 235k | return ret; |
111 | 236k | } |
112 | | |
113 | | const FFInputFormat ff_sdr2_demuxer = { |
114 | | .p.name = "sdr2", |
115 | | .p.long_name = NULL_IF_CONFIG_SMALL("SDR2"), |
116 | | .p.extensions= "sdr2", |
117 | | .p.flags = AVFMT_GENERIC_INDEX, |
118 | | .read_probe = sdr2_probe, |
119 | | .read_header = sdr2_read_header, |
120 | | .read_packet = sdr2_read_packet, |
121 | | }; |