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.
32 #include "libavutil/channel_layout.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/intreadwrite.h"
38 #define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
39 #define CDXA_TAG MKTAG('C', 'D', 'X', 'A')
41 #define RAW_CD_SECTOR_SIZE 2352
42 #define RAW_CD_SECTOR_DATA_SIZE 2304
43 #define VIDEO_DATA_CHUNK_SIZE 0x7E0
44 #define VIDEO_DATA_HEADER_SIZE 0x38
45 #define RIFF_HEADER_SIZE 0x2C
47 #define CDXA_TYPE_MASK 0x0E
48 #define CDXA_TYPE_DATA 0x08
49 #define CDXA_TYPE_AUDIO 0x04
50 #define CDXA_TYPE_VIDEO 0x02
52 #define STR_MAGIC (0x80010160)
54 typedef struct StrChannel
{
55 /* video parameters */
56 int video_stream_index
;
59 /* audio parameters */
60 int audio_stream_index
;
63 typedef struct StrDemuxContext
{
65 /* a STR file can contain up to 32 channels of data */
66 StrChannel channels
[32];
69 static const uint8_t sync_header
[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
71 static int str_probe(AVProbeData
*p
)
73 const uint8_t *sector
= p
->buf
;
74 const uint8_t *end
= sector
+ p
->buf_size
;
77 if (p
->buf_size
< RAW_CD_SECTOR_SIZE
)
80 if ((AV_RL32(&p
->buf
[0]) == RIFF_TAG
) &&
81 (AV_RL32(&p
->buf
[8]) == CDXA_TAG
)) {
83 /* RIFF header seen; skip 0x2C bytes */
84 sector
+= RIFF_HEADER_SIZE
;
87 while (end
- sector
>= RAW_CD_SECTOR_SIZE
) {
88 /* look for CD sync header (00, 0xFF x 10, 00) */
89 if (memcmp(sector
,sync_header
,sizeof(sync_header
)))
92 if (sector
[0x11] >= 32)
95 switch (sector
[0x12] & CDXA_TYPE_MASK
) {
97 case CDXA_TYPE_VIDEO
: {
98 int current_sector
= AV_RL16(§or
[0x1C]);
99 int sector_count
= AV_RL16(§or
[0x1E]);
100 int frame_size
= AV_RL32(§or
[0x24]);
103 && current_sector
< sector_count
104 && sector_count
*VIDEO_DATA_CHUNK_SIZE
>=frame_size
)){
108 /*st->codec->width = AV_RL16(§or[0x28]);
109 st->codec->height = AV_RL16(§or[0x2A]);*/
111 // if (current_sector == sector_count-1) {
117 case CDXA_TYPE_AUDIO
:
118 if(sector
[0x13]&0x2A)
123 if(sector
[0x12] & CDXA_TYPE_MASK
)
126 sector
+= RAW_CD_SECTOR_SIZE
;
128 /* MPEG files (like those ripped from VCDs) can also look like this;
129 * only return half certainty */
130 if(vid
+aud
> 3) return AVPROBE_SCORE_EXTENSION
;
131 else if(vid
+aud
) return 1;
135 static int str_read_header(AVFormatContext
*s
)
137 AVIOContext
*pb
= s
->pb
;
138 StrDemuxContext
*str
= s
->priv_data
;
139 unsigned char sector
[RAW_CD_SECTOR_SIZE
];
143 /* skip over any RIFF header */
144 if (avio_read(pb
, sector
, RIFF_HEADER_SIZE
) != RIFF_HEADER_SIZE
)
146 if (AV_RL32(§or
[0]) == RIFF_TAG
)
147 start
= RIFF_HEADER_SIZE
;
151 avio_seek(pb
, start
, SEEK_SET
);
154 str
->channels
[i
].video_stream_index
=
155 str
->channels
[i
].audio_stream_index
= -1;
158 s
->ctx_flags
|= AVFMTCTX_NOHEADER
;
163 static int str_read_packet(AVFormatContext
*s
,
166 AVIOContext
*pb
= s
->pb
;
167 StrDemuxContext
*str
= s
->priv_data
;
168 unsigned char sector
[RAW_CD_SECTOR_SIZE
];
175 if (avio_read(pb
, sector
, RAW_CD_SECTOR_SIZE
) != RAW_CD_SECTOR_SIZE
)
178 channel
= sector
[0x11];
180 return AVERROR_INVALIDDATA
;
182 switch (sector
[0x12] & CDXA_TYPE_MASK
) {
185 case CDXA_TYPE_VIDEO
:
188 int current_sector
= AV_RL16(§or
[0x1C]);
189 int sector_count
= AV_RL16(§or
[0x1E]);
190 int frame_size
= AV_RL32(§or
[0x24]);
193 && current_sector
< sector_count
194 && sector_count
*VIDEO_DATA_CHUNK_SIZE
>=frame_size
)){
195 av_log(s
, AV_LOG_ERROR
, "Invalid parameters %d %d %d\n", current_sector
, sector_count
, frame_size
);
199 if(str
->channels
[channel
].video_stream_index
< 0){
200 /* allocate a new AVStream */
201 st
= avformat_new_stream(s
, NULL
);
203 return AVERROR(ENOMEM
);
204 avpriv_set_pts_info(st
, 64, 1, 15);
206 str
->channels
[channel
].video_stream_index
= st
->index
;
208 st
->codec
->codec_type
= AVMEDIA_TYPE_VIDEO
;
209 st
->codec
->codec_id
= AV_CODEC_ID_MDEC
;
210 st
->codec
->codec_tag
= 0; /* no fourcc */
211 st
->codec
->width
= AV_RL16(§or
[0x28]);
212 st
->codec
->height
= AV_RL16(§or
[0x2A]);
215 /* if this is the first sector of the frame, allocate a pkt */
216 pkt
= &str
->channels
[channel
].tmp_pkt
;
218 if(pkt
->size
!= sector_count
*VIDEO_DATA_CHUNK_SIZE
){
220 av_log(s
, AV_LOG_ERROR
, "missmatching sector_count\n");
222 if (av_new_packet(pkt
, sector_count
*VIDEO_DATA_CHUNK_SIZE
))
224 memset(pkt
->data
, 0, sector_count
*VIDEO_DATA_CHUNK_SIZE
);
226 pkt
->pos
= avio_tell(pb
) - RAW_CD_SECTOR_SIZE
;
228 str
->channels
[channel
].video_stream_index
;
231 memcpy(pkt
->data
+ current_sector
*VIDEO_DATA_CHUNK_SIZE
,
232 sector
+ VIDEO_DATA_HEADER_SIZE
,
233 VIDEO_DATA_CHUNK_SIZE
);
235 if (current_sector
== sector_count
-1) {
236 pkt
->size
= frame_size
;
241 #if FF_API_DESTRUCT_PACKET
242 FF_DISABLE_DEPRECATION_WARNINGS
243 pkt
->destruct
= NULL
;
244 FF_ENABLE_DEPRECATION_WARNINGS
252 case CDXA_TYPE_AUDIO
:
253 if(str
->channels
[channel
].audio_stream_index
< 0){
254 int fmt
= sector
[0x13];
255 /* allocate a new AVStream */
256 st
= avformat_new_stream(s
, NULL
);
258 return AVERROR(ENOMEM
);
260 str
->channels
[channel
].audio_stream_index
= st
->index
;
262 st
->codec
->codec_type
= AVMEDIA_TYPE_AUDIO
;
263 st
->codec
->codec_id
= AV_CODEC_ID_ADPCM_XA
;
264 st
->codec
->codec_tag
= 0; /* no fourcc */
266 st
->codec
->channels
= 2;
267 st
->codec
->channel_layout
= AV_CH_LAYOUT_STEREO
;
269 st
->codec
->channels
= 1;
270 st
->codec
->channel_layout
= AV_CH_LAYOUT_MONO
;
272 st
->codec
->sample_rate
= (fmt
&4)?18900:37800;
273 // st->codec->bit_rate = 0; //FIXME;
274 st
->codec
->block_align
= 128;
276 avpriv_set_pts_info(st
, 64, 18 * 224 / st
->codec
->channels
,
277 st
->codec
->sample_rate
);
281 if (av_new_packet(pkt
, 2304))
283 memcpy(pkt
->data
,sector
+24,2304);
286 str
->channels
[channel
].audio_stream_index
;
290 av_log(s
, AV_LOG_WARNING
, "Unknown sector type %02X\n", sector
[0x12]);
291 /* drop the sector and move on */
300 static int str_read_close(AVFormatContext
*s
)
302 StrDemuxContext
*str
= s
->priv_data
;
305 if(str
->channels
[i
].tmp_pkt
.data
)
306 av_free_packet(&str
->channels
[i
].tmp_pkt
);
312 AVInputFormat ff_str_demuxer
= {
314 .long_name
= NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
315 .priv_data_size
= sizeof(StrDemuxContext
),
316 .read_probe
= str_probe
,
317 .read_header
= str_read_header
,
318 .read_packet
= str_read_packet
,
319 .read_close
= str_read_close
,
320 .flags
= AVFMT_NO_BYTE_SEEK
,