3 * Copyright (c) 2015 Paul B Mahol
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/intreadwrite.h"
26 static int msf_probe(AVProbeData *p)
28 if (memcmp(p->buf, "MSF", 3))
31 if (AV_RB32(p->buf+8) <= 0)
34 if (AV_RB32(p->buf+16) <= 0)
37 if (AV_RB32(p->buf+4) > 16)
38 return AVPROBE_SCORE_MAX / 5; //unsupported / unknown codec
40 return AVPROBE_SCORE_MAX / 3 * 2;
43 static int msf_read_header(AVFormatContext *s)
45 unsigned codec, align, size;
50 st = avformat_new_stream(s, NULL);
52 return AVERROR(ENOMEM);
54 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
55 codec = avio_rb32(s->pb);
56 st->codecpar->channels = avio_rb32(s->pb);
57 if (st->codecpar->channels <= 0 || st->codecpar->channels >= INT_MAX / 1024)
58 return AVERROR_INVALIDDATA;
59 size = avio_rb32(s->pb);
60 st->codecpar->sample_rate = avio_rb32(s->pb);
61 if (st->codecpar->sample_rate <= 0)
62 return AVERROR_INVALIDDATA;
63 align = avio_rb32(s->pb) ;
64 if (align > INT_MAX / st->codecpar->channels)
65 return AVERROR_INVALIDDATA;
66 st->codecpar->block_align = align;
68 case 0: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; break;
69 case 3: st->codecpar->block_align = 16 * st->codecpar->channels;
70 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
71 case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
72 st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
74 avpriv_request_sample(s, "Codec %d", codec);
75 return AVERROR_PATCHWELCOME;
77 st->duration = av_get_audio_frame_duration2(st->codecpar, size);
78 avio_skip(s->pb, 0x40 - avio_tell(s->pb));
79 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
84 static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
86 AVCodecParameters *par = s->streams[0]->codecpar;
88 return av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->channels);
91 AVInputFormat ff_msf_demuxer = {
93 .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"),
94 .read_probe = msf_probe,
95 .read_header = msf_read_header,
96 .read_packet = msf_read_packet,