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/bswap.h"
26 static int xvag_probe(AVProbeData *p)
28 if (memcmp(p->buf, "XVAG", 4) ||
29 memcmp(p->buf+32, "fmat", 4))
32 return AVPROBE_SCORE_MAX;
35 static int xvag_read_header(AVFormatContext *s)
37 unsigned offset, big_endian, codec;
42 st = avformat_new_stream(s, NULL);
44 return AVERROR(ENOMEM);
46 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
48 offset = avio_rl32(s->pb);
49 big_endian = offset > av_bswap32(offset);
51 offset = av_bswap32(offset);
53 codec = avio_rb32(s->pb);
54 st->codecpar->channels = avio_rb32(s->pb);
56 st->duration = avio_rb32(s->pb);
58 st->codecpar->sample_rate = avio_rb32(s->pb);
61 codec = avio_rl32(s->pb);
62 st->codecpar->channels = avio_rl32(s->pb);
64 st->duration = avio_rl32(s->pb);
66 st->codecpar->sample_rate = avio_rl32(s->pb);
69 if (st->codecpar->sample_rate <= 0)
70 return AVERROR_INVALIDDATA;
71 if (st->codecpar->channels <= 0)
72 return AVERROR_INVALIDDATA;
76 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;
77 st->codecpar->block_align = 16 * st->codecpar->channels;
80 avpriv_request_sample(s, "codec %X", codec);
81 return AVERROR_PATCHWELCOME;
84 avio_skip(s->pb, offset - avio_tell(s->pb));
86 if (avio_rb16(s->pb) == 0xFFFB) {
87 st->codecpar->codec_id = AV_CODEC_ID_MP3;
88 st->codecpar->block_align = 0x1000;
89 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
93 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
98 static int xvag_read_packet(AVFormatContext *s, AVPacket *pkt)
100 AVCodecParameters *par = s->streams[0]->codecpar;
102 return av_get_packet(s->pb, pkt, par->block_align);
105 AVInputFormat ff_xvag_demuxer = {
107 .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 XVAG"),
108 .read_probe = xvag_probe,
109 .read_header = xvag_read_header,
110 .read_packet = xvag_read_packet,
111 .extensions = "xvag",