1 /*
2 * MSF 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/intreadwrite.h"
23 #include "avformat.h"
24 #include "internal.h"
25
msf_probe(const AVProbeData *p)26 static int msf_probe(const AVProbeData *p)
27 {
28 if (memcmp(p->buf, "MSF", 3))
29 return 0;
30
31 if (AV_RB32(p->buf+8) <= 0)
32 return 0;
33
34 if (AV_RB32(p->buf+16) <= 0)
35 return 0;
36
37 if (AV_RB32(p->buf+4) > 16)
38 return AVPROBE_SCORE_MAX / 5; //unsupported / unknown codec
39
40 return AVPROBE_SCORE_MAX / 3 * 2;
41 }
42
msf_read_header(AVFormatContext *s)43 static int msf_read_header(AVFormatContext *s)
44 {
45 unsigned codec, size;
46 AVStream *st;
47 int ret;
48
49 avio_skip(s->pb, 4);
50
51 st = avformat_new_stream(s, NULL);
52 if (!st)
53 return AVERROR(ENOMEM);
54
55 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
56 codec = avio_rb32(s->pb);
57 st->codecpar->ch_layout.nb_channels = avio_rb32(s->pb);
58 if (st->codecpar->ch_layout.nb_channels <= 0 ||
59 st->codecpar->ch_layout.nb_channels >= INT_MAX / 1024)
60 return AVERROR_INVALIDDATA;
61 size = avio_rb32(s->pb);
62 st->codecpar->sample_rate = avio_rb32(s->pb);
63 if (st->codecpar->sample_rate <= 0)
64 return AVERROR_INVALIDDATA;
65 // avio_rb32(s->pb); /* byte flags with encoder info */
66 switch (codec) {
67 case 0: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; break;
68 case 1: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break;
69 case 3: st->codecpar->block_align = 16 * st->codecpar->ch_layout.nb_channels;
70 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
71 case 4:
72 case 5:
73 case 6: st->codecpar->block_align = (codec == 4 ? 96 : codec == 5 ? 152 : 192) * st->codecpar->ch_layout.nb_channels;
74 if (st->codecpar->ch_layout.nb_channels > UINT16_MAX / 2048)
75 return AVERROR_INVALIDDATA;
76 ret = ff_alloc_extradata(st->codecpar, 14);
77 if (ret < 0)
78 return ret;
79 memset(st->codecpar->extradata, 0, st->codecpar->extradata_size);
80 AV_WL16(st->codecpar->extradata, 1); /* version */
81 AV_WL16(st->codecpar->extradata+2, 2048 * st->codecpar->ch_layout.nb_channels); /* unknown size */
82 AV_WL16(st->codecpar->extradata+6, codec == 4 ? 1 : 0); /* joint stereo */
83 AV_WL16(st->codecpar->extradata+8, codec == 4 ? 1 : 0); /* joint stereo (repeat?) */
84 AV_WL16(st->codecpar->extradata+10, 1);
85 st->codecpar->codec_id = AV_CODEC_ID_ATRAC3; break;
86 case 7: ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
87 st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
88 default:
89 avpriv_request_sample(s, "Codec %d", codec);
90 return AVERROR_PATCHWELCOME;
91 }
92 st->duration = av_get_audio_frame_duration2(st->codecpar, size);
93 avio_skip(s->pb, 0x40 - avio_tell(s->pb));
94 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
95
96 return 0;
97 }
98
msf_read_packet(AVFormatContext *s, AVPacket *pkt)99 static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
100 {
101 AVCodecParameters *par = s->streams[0]->codecpar;
102
103 return av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->ch_layout.nb_channels);
104 }
105
106 const AVInputFormat ff_msf_demuxer = {
107 .name = "msf",
108 .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"),
109 .read_probe = msf_probe,
110 .read_header = msf_read_header,
111 .read_packet = msf_read_packet,
112 .extensions = "msf",
113 };
114