2 * Sony Playstation (PSX) STR File Demuxer
3 * Copyright (c) 2003 The ffmpeg Project
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
24 * PSX STR file demuxer
25 * by Mike Melanson (melanson@pcisys.net)
26 * This module handles streams that have been ripped from Sony Playstation
27 * CD games. This demuxer can handle either raw STR files (which are just
28 * concatenations of raw compact disc sectors) or STR files with 0x2C-byte
29 * RIFF headers, followed by CD sectors.
34 #define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
35 #define CDXA_TAG MKTAG('C', 'D', 'X', 'A')
37 #define RAW_CD_SECTOR_SIZE 2352
38 #define RAW_CD_SECTOR_DATA_SIZE 2304
39 #define VIDEO_DATA_CHUNK_SIZE 0x7E0
40 #define VIDEO_DATA_HEADER_SIZE 0x38
41 #define RIFF_HEADER_SIZE 0x2C
43 #define CDXA_TYPE_MASK 0x0E
44 #define CDXA_TYPE_DATA 0x08
45 #define CDXA_TYPE_AUDIO 0x04
46 #define CDXA_TYPE_VIDEO 0x02
48 #define STR_MAGIC (0x80010160)
50 typedef struct StrChannel
{
51 /* video parameters */
52 int video_stream_index
;
55 /* audio parameters */
56 int audio_stream_index
;
59 typedef struct StrDemuxContext
{
61 /* a STR file can contain up to 32 channels of data */
62 StrChannel channels
[32];
65 static const char sync_header
[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
67 static int str_probe(AVProbeData
*p
)
69 uint8_t *sector
= p
->buf
;
71 if (p
->buf_size
< RAW_CD_SECTOR_SIZE
)
74 if ((AV_RL32(&p
->buf
[0]) == RIFF_TAG
) &&
75 (AV_RL32(&p
->buf
[8]) == CDXA_TAG
)) {
77 /* RIFF header seen; skip 0x2C bytes */
78 sector
+= RIFF_HEADER_SIZE
;
81 /* look for CD sync header (00, 0xFF x 10, 00) */
82 if (memcmp(sector
,sync_header
,sizeof(sync_header
)))
85 if(sector
[0x11] >= 32)
87 if( (sector
[0x12] & CDXA_TYPE_MASK
) != CDXA_TYPE_VIDEO
88 && (sector
[0x12] & CDXA_TYPE_MASK
) != CDXA_TYPE_AUDIO
89 && (sector
[0x12] & CDXA_TYPE_MASK
) != CDXA_TYPE_DATA
)
92 /* MPEG files (like those ripped from VCDs) can also look like this;
93 * only return half certainty */
97 static int str_read_header(AVFormatContext
*s
,
98 AVFormatParameters
*ap
)
100 ByteIOContext
*pb
= s
->pb
;
101 StrDemuxContext
*str
= s
->priv_data
;
102 unsigned char sector
[RAW_CD_SECTOR_SIZE
];
106 /* skip over any RIFF header */
107 if (get_buffer(pb
, sector
, RIFF_HEADER_SIZE
) != RIFF_HEADER_SIZE
)
109 if (AV_RL32(§or
[0]) == RIFF_TAG
)
110 start
= RIFF_HEADER_SIZE
;
114 url_fseek(pb
, start
, SEEK_SET
);
117 str
->channels
[i
].video_stream_index
=
118 str
->channels
[i
].audio_stream_index
= -1;
121 s
->ctx_flags
|= AVFMTCTX_NOHEADER
;
126 static int str_read_packet(AVFormatContext
*s
,
129 ByteIOContext
*pb
= s
->pb
;
130 StrDemuxContext
*str
= s
->priv_data
;
131 unsigned char sector
[RAW_CD_SECTOR_SIZE
];
138 if (get_buffer(pb
, sector
, RAW_CD_SECTOR_SIZE
) != RAW_CD_SECTOR_SIZE
)
141 channel
= sector
[0x11];
143 return AVERROR_INVALIDDATA
;
145 switch (sector
[0x12] & CDXA_TYPE_MASK
) {
148 case CDXA_TYPE_VIDEO
:
151 int current_sector
= AV_RL16(§or
[0x1C]);
152 int sector_count
= AV_RL16(§or
[0x1E]);
153 int frame_size
= AV_RL32(§or
[0x24]);
156 && current_sector
< sector_count
157 && sector_count
*VIDEO_DATA_CHUNK_SIZE
>=frame_size
)){
158 av_log(s
, AV_LOG_ERROR
, "Invalid parameters %d %d %d\n", current_sector
, sector_count
, frame_size
);
162 if(str
->channels
[channel
].video_stream_index
< 0){
163 /* allocate a new AVStream */
164 st
= av_new_stream(s
, 0);
166 return AVERROR(ENOMEM
);
167 av_set_pts_info(st
, 64, 1, 15);
169 str
->channels
[channel
].video_stream_index
= st
->index
;
171 st
->codec
->codec_type
= CODEC_TYPE_VIDEO
;
172 st
->codec
->codec_id
= CODEC_ID_MDEC
;
173 st
->codec
->codec_tag
= 0; /* no fourcc */
174 st
->codec
->width
= AV_RL16(§or
[0x28]);
175 st
->codec
->height
= AV_RL16(§or
[0x2A]);
178 /* if this is the first sector of the frame, allocate a pkt */
179 pkt
= &str
->channels
[channel
].tmp_pkt
;
181 if(pkt
->size
!= sector_count
*VIDEO_DATA_CHUNK_SIZE
){
183 av_log(s
, AV_LOG_ERROR
, "missmatching sector_count\n");
185 if (av_new_packet(pkt
, sector_count
*VIDEO_DATA_CHUNK_SIZE
))
188 pkt
->pos
= url_ftell(pb
) - RAW_CD_SECTOR_SIZE
;
190 str
->channels
[channel
].video_stream_index
;
193 memcpy(pkt
->data
+ current_sector
*VIDEO_DATA_CHUNK_SIZE
,
194 sector
+ VIDEO_DATA_HEADER_SIZE
,
195 VIDEO_DATA_CHUNK_SIZE
);
197 if (current_sector
== sector_count
-1) {
198 pkt
->size
= frame_size
;
208 case CDXA_TYPE_AUDIO
:
209 if(str
->channels
[channel
].audio_stream_index
< 0){
210 int fmt
= sector
[0x13];
211 /* allocate a new AVStream */
212 st
= av_new_stream(s
, 0);
214 return AVERROR(ENOMEM
);
216 str
->channels
[channel
].audio_stream_index
= st
->index
;
218 st
->codec
->codec_type
= CODEC_TYPE_AUDIO
;
219 st
->codec
->codec_id
= CODEC_ID_ADPCM_XA
;
220 st
->codec
->codec_tag
= 0; /* no fourcc */
221 st
->codec
->channels
= (fmt
&1)?2:1;
222 st
->codec
->sample_rate
= (fmt
&4)?18900:37800;
223 // st->codec->bit_rate = 0; //FIXME;
224 st
->codec
->block_align
= 128;
226 av_set_pts_info(st
, 64, 128, st
->codec
->sample_rate
);
229 if (av_new_packet(pkt
, 2304))
231 memcpy(pkt
->data
,sector
+24,2304);
234 str
->channels
[channel
].audio_stream_index
;
238 av_log(s
, AV_LOG_WARNING
, "Unknown sector type %02X\n", sector
[0x12]);
239 /* drop the sector and move on */
248 static int str_read_close(AVFormatContext
*s
)
250 StrDemuxContext
*str
= s
->priv_data
;
253 if(str
->channels
[i
].tmp_pkt
.data
)
254 av_free_packet(&str
->channels
[i
].tmp_pkt
);
260 AVInputFormat str_demuxer
= {
262 NULL_IF_CONFIG_SMALL("Sony Playstation STR format"),
263 sizeof(StrDemuxContext
),