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 return AVPROBE_SCORE_MAX / 3 * 2;
40 static int msf_read_header(AVFormatContext *s)
42 unsigned codec, align, size;
47 st = avformat_new_stream(s, NULL);
49 return AVERROR(ENOMEM);
51 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
52 codec = avio_rb32(s->pb);
53 st->codec->channels = avio_rb32(s->pb);
54 if (st->codec->channels <= 0)
55 return AVERROR_INVALIDDATA;
56 size = avio_rb32(s->pb);
57 st->codec->sample_rate = avio_rb32(s->pb);
58 if (st->codec->sample_rate <= 0)
59 return AVERROR_INVALIDDATA;
60 align = avio_rb32(s->pb) ;
61 if (align > INT_MAX / st->codec->channels)
62 return AVERROR_INVALIDDATA;
63 st->codec->block_align = align;
65 case 0: st->codec->codec_id = AV_CODEC_ID_PCM_S16BE; break;
66 case 3: st->codec->block_align = 16 * st->codec->channels;
67 st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
68 case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
69 st->codec->codec_id = AV_CODEC_ID_MP3; break;
71 avpriv_request_sample(s, "Codec %d", codec);
72 return AVERROR_PATCHWELCOME;
74 st->duration = av_get_audio_frame_duration(st->codec, size);
75 avio_skip(s->pb, 0x40 - avio_tell(s->pb));
76 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
81 static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
83 AVCodecContext *codec = s->streams[0]->codec;
85 return av_get_packet(s->pb, pkt, codec->block_align ? codec->block_align : 1024 * codec->channels);
88 AVInputFormat ff_msf_demuxer = {
90 .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"),
91 .read_probe = msf_probe,
92 .read_header = msf_read_header,
93 .read_packet = msf_read_packet,