FFmpeg
psxstr.c
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1 /*
2  * Sony Playstation (PSX) STR File Demuxer
3  * Copyright (c) 2003 The FFmpeg project
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 /**
23  * @file
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.
30  */
31 
33 #include "libavutil/internal.h"
34 #include "libavutil/intreadwrite.h"
35 #include "avformat.h"
36 #include "internal.h"
37 
38 #define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
39 #define CDXA_TAG MKTAG('C', 'D', 'X', 'A')
40 
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
46 
47 #define CDXA_TYPE_MASK 0x0E
48 #define CDXA_TYPE_DATA 0x08
49 #define CDXA_TYPE_AUDIO 0x04
50 #define CDXA_TYPE_VIDEO 0x02
51 
52 #define STR_MAGIC (0x80010160)
53 
54 typedef struct StrChannel {
55  /* video parameters */
58 
59  /* audio parameters */
61 } StrChannel;
62 
63 typedef struct StrDemuxContext {
64 
65  /* a STR file can contain up to 32 channels of data */
68 
69 static const uint8_t sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
70 
71 static int str_probe(const AVProbeData *p)
72 {
73  const uint8_t *sector= p->buf;
74  const uint8_t *end= sector + p->buf_size;
75  int aud=0, vid=0;
76 
78  return 0;
79 
80  if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
81  (AV_RL32(&p->buf[8]) == CDXA_TAG)) {
82 
83  /* RIFF header seen; skip 0x2C bytes */
84  sector += RIFF_HEADER_SIZE;
85  }
86 
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)))
90  return 0;
91 
92  if (sector[0x11] >= 32)
93  return 0;
94 
95  switch (sector[0x12] & CDXA_TYPE_MASK) {
96  case CDXA_TYPE_DATA:
97  case CDXA_TYPE_VIDEO: {
98  int current_sector = AV_RL16(&sector[0x1C]);
99  int sector_count = AV_RL16(&sector[0x1E]);
100  int frame_size = AV_RL32(&sector[0x24]);
101 
102  if(!( frame_size>=0
103  && current_sector < sector_count
104  && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
105  return 0;
106  }
107  vid++;
108 
109  }
110  break;
111  case CDXA_TYPE_AUDIO:
112  if(sector[0x13]&0x2A)
113  return 0;
114  aud++;
115  break;
116  default:
117  if(sector[0x12] & CDXA_TYPE_MASK)
118  return 0;
119  }
120  sector += RAW_CD_SECTOR_SIZE;
121  }
122  /* MPEG files (like those ripped from VCDs) can also look like this;
123  * only return half certainty */
124  if(vid+aud > 3) return AVPROBE_SCORE_EXTENSION;
125  else if(vid+aud) return 1;
126  else return 0;
127 }
128 
130 {
131  AVIOContext *pb = s->pb;
132  StrDemuxContext *str = s->priv_data;
133  unsigned char sector[RAW_CD_SECTOR_SIZE];
134  int start;
135  int i;
136 
137  /* skip over any RIFF header */
138  if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
139  return AVERROR(EIO);
140  if (AV_RL32(&sector[0]) == RIFF_TAG)
141  start = RIFF_HEADER_SIZE;
142  else
143  start = 0;
144 
145  avio_seek(pb, start, SEEK_SET);
146 
147  for(i=0; i<32; i++){
148  str->channels[i].video_stream_index=
149  str->channels[i].audio_stream_index= -1;
150  }
151 
152  s->ctx_flags |= AVFMTCTX_NOHEADER;
153 
154  return 0;
155 }
156 
158  AVPacket *ret_pkt)
159 {
160  AVIOContext *pb = s->pb;
161  StrDemuxContext *str = s->priv_data;
162  unsigned char sector[RAW_CD_SECTOR_SIZE];
163  int channel, ret;
164  AVPacket *pkt;
165  AVStream *st;
166 
167  while (1) {
168 
169  if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
170  return AVERROR(EIO);
171 
172  channel = sector[0x11];
173  if (channel >= 32)
174  return AVERROR_INVALIDDATA;
175 
176  switch (sector[0x12] & CDXA_TYPE_MASK) {
177 
178  case CDXA_TYPE_DATA:
179  case CDXA_TYPE_VIDEO:
180  {
181 
182  int current_sector = AV_RL16(&sector[0x1C]);
183  int sector_count = AV_RL16(&sector[0x1E]);
184  int frame_size = AV_RL32(&sector[0x24]);
185 
186  if(!( frame_size>=0
187  && current_sector < sector_count
188  && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
189  av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
190  break;
191  }
192 
193  if(str->channels[channel].video_stream_index < 0){
194  /* allocate a new AVStream */
195  st = avformat_new_stream(s, NULL);
196  if (!st)
197  return AVERROR(ENOMEM);
198  avpriv_set_pts_info(st, 64, 1, 15);
199 
200  str->channels[channel].video_stream_index = st->index;
201 
204  st->codecpar->codec_tag = 0; /* no fourcc */
205  st->codecpar->width = AV_RL16(&sector[0x28]);
206  st->codecpar->height = AV_RL16(&sector[0x2A]);
207  }
208 
209  /* if this is the first sector of the frame, allocate a pkt */
210  pkt = &str->channels[channel].tmp_pkt;
211 
212  if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
213  if(pkt->data)
214  av_log(s, AV_LOG_ERROR, "mismatching sector_count\n");
216  ret = av_new_packet(pkt, sector_count * VIDEO_DATA_CHUNK_SIZE);
217  if (ret < 0)
218  return ret;
219  memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE);
220 
222  pkt->stream_index =
223  str->channels[channel].video_stream_index;
224  }
225 
226  memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
227  sector + VIDEO_DATA_HEADER_SIZE,
229 
230  if (current_sector == sector_count-1) {
231  pkt->size= frame_size;
232  *ret_pkt = *pkt;
233  pkt->data= NULL;
234  pkt->size= -1;
235  pkt->buf = NULL;
236  return 0;
237  }
238 
239  }
240  break;
241 
242  case CDXA_TYPE_AUDIO:
243  if(str->channels[channel].audio_stream_index < 0){
244  int fmt = sector[0x13];
245  /* allocate a new AVStream */
246  st = avformat_new_stream(s, NULL);
247  if (!st)
248  return AVERROR(ENOMEM);
249 
250  str->channels[channel].audio_stream_index = st->index;
251 
254  st->codecpar->codec_tag = 0; /* no fourcc */
255  if (fmt & 1) {
256  st->codecpar->channels = 2;
258  } else {
259  st->codecpar->channels = 1;
261  }
262  st->codecpar->sample_rate = (fmt&4)?18900:37800;
263  // st->codecpar->bit_rate = 0; //FIXME;
264  st->codecpar->block_align = 128;
265 
266  avpriv_set_pts_info(st, 64, 18 * 224 / st->codecpar->channels,
267  st->codecpar->sample_rate);
268  st->start_time = 0;
269  }
270  pkt = ret_pkt;
271  if ((ret = av_new_packet(pkt, 2304)) < 0)
272  return ret;
273  memcpy(pkt->data,sector+24,2304);
274 
275  pkt->stream_index =
276  str->channels[channel].audio_stream_index;
277  pkt->duration = 1;
278  return 0;
279  default:
280  av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
281  /* drop the sector and move on */
282  break;
283  }
284 
285  if (avio_feof(pb))
286  return AVERROR(EIO);
287  }
288 }
289 
291 {
292  StrDemuxContext *str = s->priv_data;
293  int i;
294  for(i=0; i<32; i++){
295  if(str->channels[i].tmp_pkt.data)
296  av_packet_unref(&str->channels[i].tmp_pkt);
297  }
298 
299  return 0;
300 }
301 
303  .name = "psxstr",
304  .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
305  .priv_data_size = sizeof(StrDemuxContext),
311 };
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:403
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:187
AVFMT_NO_BYTE_SEEK
#define AVFMT_NO_BYTE_SEEK
Format does not allow seeking by bytes.
Definition: avformat.h:475
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4376
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:90
StrChannel::audio_stream_index
int audio_stream_index
Definition: psxstr.c:60
AVPacket::data
uint8_t * data
Definition: packet.h:365
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:383
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
ff_str_demuxer
const AVInputFormat ff_str_demuxer
Definition: psxstr.c:302
RIFF_HEADER_SIZE
#define RIFF_HEADER_SIZE
Definition: psxstr.c:45
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:142
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:538
str_read_packet
static int str_read_packet(AVFormatContext *s, AVPacket *ret_pkt)
Definition: psxstr.c:157
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
AV_CODEC_ID_MDEC
@ AV_CODEC_ID_MDEC
Definition: codec_id.h:87
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:181
AVInputFormat
Definition: avformat.h:621
intreadwrite.h
sync_header
static const uint8_t sync_header[12]
Definition: psxstr.c:69
s
#define s(width, name)
Definition: cbs_vp9.c:257
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:94
str_probe
static int str_probe(const AVProbeData *p)
Definition: psxstr.c:71
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:626
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
frame_size
int frame_size
Definition: mxfenc.c:2206
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:126
StrDemuxContext
Definition: psxstr.c:63
channels
channels
Definition: aptx.h:33
CDXA_TYPE_VIDEO
#define CDXA_TYPE_VIDEO
Definition: psxstr.c:50
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:94
StrChannel
Definition: psxstr.c:54
AVFormatContext
Format I/O context.
Definition: avformat.h:1097
internal.h
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:348
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:984
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
NULL
#define NULL
Definition: coverity.c:32
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1046
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
CDXA_TAG
#define CDXA_TAG
Definition: psxstr.c:39
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:456
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
AV_CODEC_ID_ADPCM_XA
@ AV_CODEC_ID_ADPCM_XA
Definition: codec_id.h:360
aud
static int FUNC() aud(CodedBitstreamContext *ctx, RWContext *rw, H264RawAUD *current)
Definition: cbs_h264_syntax_template.c:759
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVPacket::size
int size
Definition: packet.h:366
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
StrChannel::tmp_pkt
AVPacket tmp_pkt
Definition: psxstr.c:57
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4801
RAW_CD_SECTOR_SIZE
#define RAW_CD_SECTOR_SIZE
Definition: psxstr.c:41
CDXA_TYPE_MASK
#define CDXA_TYPE_MASK
Definition: psxstr.c:47
StrChannel::video_stream_index
int video_stream_index
Definition: psxstr.c:56
CDXA_TYPE_AUDIO
#define CDXA_TYPE_AUDIO
Definition: psxstr.c:49
VIDEO_DATA_HEADER_SIZE
#define VIDEO_DATA_HEADER_SIZE
Definition: psxstr.c:44
VIDEO_DATA_CHUNK_SIZE
#define VIDEO_DATA_CHUNK_SIZE
Definition: psxstr.c:43
i
int i
Definition: input.c:407
RIFF_TAG
#define RIFF_TAG
Definition: psxstr.c:38
internal.h
AVCodecParameters::height
int height
Definition: codec_par.h:127
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:177
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:837
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:243
avformat.h
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:838
channel_layout.h
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:616
AVPacket::stream_index
int stream_index
Definition: packet.h:367
str_read_header
static int str_read_header(AVFormatContext *s)
Definition: psxstr.c:129
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:342
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:385
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
convert_header.str
string str
Definition: convert_header.py:20
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:870
channel
channel
Definition: ebur128.h:39
CDXA_TYPE_DATA
#define CDXA_TYPE_DATA
Definition: psxstr.c:48
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:354
str_read_close
static int str_read_close(AVFormatContext *s)
Definition: psxstr.c:290