/src/ffmpeg/libavformat/vag.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * VAG demuxer |
3 | | * Copyright (c) 2015 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/channel_layout.h" |
23 | | #include "avformat.h" |
24 | | #include "demux.h" |
25 | | #include "internal.h" |
26 | | |
27 | | static int vag_probe(const AVProbeData *p) |
28 | 358k | { |
29 | 358k | if (memcmp(p->buf, "VAGp\0\0\0", 7)) |
30 | 357k | return 0; |
31 | | |
32 | 807 | return AVPROBE_SCORE_MAX; |
33 | 358k | } |
34 | | |
35 | | static int vag_read_header(AVFormatContext *s) |
36 | 5.25k | { |
37 | 5.25k | AVStream *st; |
38 | | |
39 | 5.25k | st = avformat_new_stream(s, NULL); |
40 | 5.25k | if (!st) |
41 | 0 | return AVERROR(ENOMEM); |
42 | | |
43 | 5.25k | avio_skip(s->pb, 4); |
44 | 5.25k | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
45 | 5.25k | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; |
46 | 5.25k | st->codecpar->ch_layout.nb_channels = 1 + (avio_rb32(s->pb) == 0x00000004); |
47 | 5.25k | avio_skip(s->pb, 4); |
48 | 5.25k | if (st->codecpar->ch_layout.nb_channels > 1) { |
49 | 64 | st->duration = avio_rb32(s->pb); |
50 | 5.19k | } else { |
51 | 5.19k | st->duration = avio_rb32(s->pb) / 16 * 28; |
52 | 5.19k | } |
53 | 5.25k | st->codecpar->sample_rate = avio_rb32(s->pb); |
54 | 5.25k | if (st->codecpar->sample_rate <= 0) |
55 | 4.46k | return AVERROR_INVALIDDATA; |
56 | 787 | avio_seek(s->pb, 0x1000, SEEK_SET); |
57 | 787 | if (avio_rl32(s->pb) == MKTAG('V','A','G','p')) { |
58 | 109 | st->codecpar->block_align = 0x1000 * st->codecpar->ch_layout.nb_channels; |
59 | 109 | avio_seek(s->pb, 0, SEEK_SET); |
60 | 109 | st->duration = st->duration / 16 * 28; |
61 | 678 | } else { |
62 | 678 | st->codecpar->block_align = 16 * st->codecpar->ch_layout.nb_channels; |
63 | 678 | avio_seek(s->pb, st->codecpar->ch_layout.nb_channels > 1 ? 0x80 : 0x30, SEEK_SET); |
64 | 678 | } |
65 | 787 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
66 | | |
67 | 787 | return 0; |
68 | 5.25k | } |
69 | | |
70 | | static int vag_read_packet(AVFormatContext *s, AVPacket *pkt) |
71 | 116k | { |
72 | 116k | AVCodecParameters *par = s->streams[0]->codecpar; |
73 | | |
74 | 116k | return av_get_packet(s->pb, pkt, par->block_align); |
75 | 116k | } |
76 | | |
77 | | const FFInputFormat ff_vag_demuxer = { |
78 | | .p.name = "vag", |
79 | | .p.long_name = NULL_IF_CONFIG_SMALL("Sony PS2 VAG"), |
80 | | .p.extensions = "vag", |
81 | | .read_probe = vag_probe, |
82 | | .read_header = vag_read_header, |
83 | | .read_packet = vag_read_packet, |
84 | | }; |