path: root/libavformat/msf.c (plain)
blob: 6bd18f29bd719f4e5542ab512f7b81c5be354a0c

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
26	static int msf_probe(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
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->channels = avio_rb32(s->pb);
58	if (st->codecpar->channels <= 0 || st->codecpar->channels >= INT_MAX / 1024)
59	return AVERROR_INVALIDDATA;
60	size = avio_rb32(s->pb);
61	st->codecpar->sample_rate = avio_rb32(s->pb);
62	if (st->codecpar->sample_rate <= 0)
63	return AVERROR_INVALIDDATA;
64	// avio_rb32(s->pb); /* byte flags with encoder info */
65	switch (codec) {
66	case 0: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; break;
67	case 1: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break;
68	case 3: st->codecpar->block_align = 16 * st->codecpar->channels;
69	st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
70	case 4:
71	case 5:
72	case 6: st->codecpar->block_align = (codec == 4 ? 96 : codec == 5 ? 152 : 192) * st->codecpar->channels;
73	ret = ff_alloc_extradata(st->codecpar, 14);
74	if (ret < 0)
75	return ret;
76	memset(st->codecpar->extradata, 0, st->codecpar->extradata_size);
77	AV_WL16(st->codecpar->extradata, 1); /* version */
78	AV_WL16(st->codecpar->extradata+2, 2048 * st->codecpar->channels); /* unknown size */
79	AV_WL16(st->codecpar->extradata+6, codec == 4 ? 1 : 0); /* joint stereo */
80	AV_WL16(st->codecpar->extradata+8, codec == 4 ? 1 : 0); /* joint stereo (repeat?) */
81	AV_WL16(st->codecpar->extradata+10, 1);
82	st->codecpar->codec_id = AV_CODEC_ID_ATRAC3; break;
83	case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
84	st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
85	default:
86	avpriv_request_sample(s, "Codec %d", codec);
87	return AVERROR_PATCHWELCOME;
88	}
89	st->duration = av_get_audio_frame_duration2(st->codecpar, size);
90	avio_skip(s->pb, 0x40 - avio_tell(s->pb));
91	avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
92
93	return 0;
94	}
95
96	static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
97	{
98	AVCodecParameters *par = s->streams[0]->codecpar;
99
100	return av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->channels);
101	}
102
103	AVInputFormat ff_msf_demuxer = {
104	.name = "msf",
105	.long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"),
106	.read_probe = msf_probe,
107	.read_header = msf_read_header,
108	.read_packet = msf_read_packet,
109	.extensions = "msf",
110	};
111