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 #define CDXA_TYPE_EMPTY 0x00
52 
53 #define STR_MAGIC (0x80010160)
54 
55 typedef struct StrChannel {
56  /* video parameters */
59 
60  /* audio parameters */
62 } StrChannel;
63 
64 typedef struct StrDemuxContext {
65 
66  /* a STR file can contain up to 32 channels of data */
69 
70 static const uint8_t sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
71 
72 static int str_probe(const AVProbeData *p)
73 {
74  const uint8_t *sector= p->buf;
75  const uint8_t *end= sector + p->buf_size;
76  int aud=0, vid=0;
77 
79  return 0;
80 
81  if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
82  (AV_RL32(&p->buf[8]) == CDXA_TAG)) {
83 
84  /* RIFF header seen; skip 0x2C bytes */
85  sector += RIFF_HEADER_SIZE;
86  }
87 
88  while (end - sector >= RAW_CD_SECTOR_SIZE) {
89  /* look for CD sync header (00, 0xFF x 10, 00) */
90  if (memcmp(sector,sync_header,sizeof(sync_header)))
91  return 0;
92 
93  if (sector[0x11] >= 32)
94  return 0;
95 
96  switch (sector[0x12] & CDXA_TYPE_MASK) {
97  case CDXA_TYPE_DATA:
98  case CDXA_TYPE_VIDEO: {
99  int current_sector = AV_RL16(&sector[0x1C]);
100  int sector_count = AV_RL16(&sector[0x1E]);
101  int frame_size = AV_RL32(&sector[0x24]);
102 
103  if(!( frame_size>=0
104  && current_sector < sector_count
105  && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
106  return 0;
107  }
108  vid++;
109 
110  }
111  break;
112  case CDXA_TYPE_AUDIO:
113  if(sector[0x13]&0x2A)
114  return 0;
115  aud++;
116  break;
117  default:
118  if(sector[0x12] & CDXA_TYPE_MASK)
119  return 0;
120  }
121  sector += RAW_CD_SECTOR_SIZE;
122  }
123  /* MPEG files (like those ripped from VCDs) can also look like this;
124  * only return half certainty */
125  if(vid+aud > 3) return AVPROBE_SCORE_EXTENSION;
126  else if(vid+aud) return 1;
127  else return 0;
128 }
129 
131 {
132  AVIOContext *pb = s->pb;
133  StrDemuxContext *str = s->priv_data;
134  unsigned char sector[RAW_CD_SECTOR_SIZE];
135  int start;
136  int i;
137 
138  /* skip over any RIFF header */
139  if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
140  return AVERROR(EIO);
141  if (AV_RL32(&sector[0]) == RIFF_TAG)
142  start = RIFF_HEADER_SIZE;
143  else
144  start = 0;
145 
146  avio_seek(pb, start, SEEK_SET);
147 
148  for(i=0; i<32; i++){
150  str->channels[i].audio_stream_index= -1;
151  }
152 
153  s->ctx_flags |= AVFMTCTX_NOHEADER;
154 
155  return 0;
156 }
157 
159  AVPacket *ret_pkt)
160 {
161  AVIOContext *pb = s->pb;
162  StrDemuxContext *str = s->priv_data;
163  unsigned char sector[RAW_CD_SECTOR_SIZE];
164  int channel, ret;
165  AVPacket *pkt;
166  AVStream *st;
167 
168  while (1) {
169  int read = avio_read(pb, sector, RAW_CD_SECTOR_SIZE);
170 
171  if (read == AVERROR_EOF)
172  return AVERROR_EOF;
173 
174  if (read != RAW_CD_SECTOR_SIZE)
175  return AVERROR(EIO);
176 
177  channel = sector[0x11];
178  if (channel >= 32)
179  return AVERROR_INVALIDDATA;
180 
181  switch (sector[0x12] & CDXA_TYPE_MASK) {
182 
183  case CDXA_TYPE_DATA:
184  case CDXA_TYPE_VIDEO:
185  {
186 
187  int current_sector = AV_RL16(&sector[0x1C]);
188  int sector_count = AV_RL16(&sector[0x1E]);
189  int frame_size = AV_RL32(&sector[0x24]);
190 
191  if(!( frame_size>=0
192  && current_sector < sector_count
193  && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
194  av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
195  break;
196  }
197 
198  if(str->channels[channel].video_stream_index < 0){
199  /* allocate a new AVStream */
200  st = avformat_new_stream(s, NULL);
201  if (!st)
202  return AVERROR(ENOMEM);
203  avpriv_set_pts_info(st, 64, 1, 15);
204 
206 
209  st->codecpar->codec_tag = 0; /* no fourcc */
210  st->codecpar->width = AV_RL16(&sector[0x28]);
211  st->codecpar->height = AV_RL16(&sector[0x2A]);
212  }
213 
214  /* if this is the first sector of the frame, allocate a pkt */
215  pkt = &str->channels[channel].tmp_pkt;
216 
217  if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
218  if(pkt->data)
219  av_log(s, AV_LOG_ERROR, "mismatching sector_count\n");
221  ret = av_new_packet(pkt, sector_count * VIDEO_DATA_CHUNK_SIZE);
222  if (ret < 0)
223  return ret;
224  memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE);
225 
227  pkt->stream_index =
229  }
230 
231  memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
232  sector + VIDEO_DATA_HEADER_SIZE,
234 
235  if (current_sector == sector_count-1) {
236  pkt->size= frame_size;
237  *ret_pkt = *pkt;
238  pkt->data= NULL;
239  pkt->size= -1;
240  pkt->buf = NULL;
241  return 0;
242  }
243 
244  }
245  break;
246 
247  case CDXA_TYPE_AUDIO:
248  if(str->channels[channel].audio_stream_index < 0){
249  int fmt = sector[0x13];
250  /* allocate a new AVStream */
251  st = avformat_new_stream(s, NULL);
252  if (!st)
253  return AVERROR(ENOMEM);
254 
256 
259  st->codecpar->codec_tag = 0; /* no fourcc */
260  av_channel_layout_default(&st->codecpar->ch_layout, (fmt & 1) + 1);
261  st->codecpar->sample_rate = (fmt&4)?18900:37800;
262  // st->codecpar->bit_rate = 0; //FIXME;
263  st->codecpar->block_align = 128;
264 
265  avpriv_set_pts_info(st, 64, 18 * 224 / st->codecpar->ch_layout.nb_channels,
266  st->codecpar->sample_rate);
267  st->start_time = 0;
268  }
269  pkt = ret_pkt;
270  if ((ret = av_new_packet(pkt, 2304)) < 0)
271  return ret;
272  memcpy(pkt->data,sector+24,2304);
273 
274  pkt->stream_index =
276  pkt->duration = 1;
277  return 0;
278  case CDXA_TYPE_EMPTY: /* CD-ROM XA, May 1991, 4.3.2.3 */
279  /* NOTE this also catches 0x80 (EOF bit) because of CDXA_TYPE_MASK */
280  /* TODO consider refactoring so as to explicitly handle each case? */
281  break;
282  default:
283  av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
284  /* drop the sector and move on */
285  break;
286  }
287 
288  if (avio_feof(pb))
289  return AVERROR(EIO);
290  }
291 }
292 
294 {
295  StrDemuxContext *str = s->priv_data;
296  int i;
297  for(i=0; i<32; i++){
298  if(str->channels[i].tmp_pkt.data)
300  }
301 
302  return 0;
303 }
304 
306  .name = "psxstr",
307  .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
308  .priv_data_size = sizeof(StrDemuxContext),
314 };
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:427
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AVFMT_NO_BYTE_SEEK
#define AVFMT_NO_BYTE_SEEK
Format does not allow seeking by bytes.
Definition: avformat.h:488
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
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
StrChannel::audio_stream_index
int audio_stream_index
Definition: psxstr.c:61
AVPacket::data
uint8_t * data
Definition: packet.h:522
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:540
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:455
ff_str_demuxer
const AVInputFormat ff_str_demuxer
Definition: psxstr.c:305
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:323
RIFF_HEADER_SIZE
#define RIFF_HEADER_SIZE
Definition: psxstr.c:45
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:830
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:513
str_read_packet
static int str_read_packet(AVFormatContext *s, AVPacket *ret_pkt)
Definition: psxstr.c:158
AV_CODEC_ID_MDEC
@ AV_CODEC_ID_MDEC
Definition: codec_id.h:89
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:180
AVInputFormat
Definition: avformat.h:549
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:41
intreadwrite.h
sync_header
static const uint8_t sync_header[12]
Definition: psxstr.c:70
s
#define s(width, name)
Definition: cbs_vp9.c:198
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:98
str_probe
static int str_probe(const AVProbeData *p)
Definition: psxstr.c:72
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:554
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:454
frame_size
int frame_size
Definition: mxfenc.c:2422
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:121
StrDemuxContext
Definition: psxstr.c:64
channels
channels
Definition: aptx.h:31
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:55
AVFormatContext
Format I/O context.
Definition: avformat.h:1202
internal.h
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:505
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:864
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:550
NULL
#define NULL
Definition: coverity.c:32
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1153
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:452
CDXA_TAG
#define CDXA_TAG
Definition: psxstr.c:39
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:206
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:462
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:171
AV_CODEC_ID_ADPCM_XA
@ AV_CODEC_ID_ADPCM_XA
Definition: codec_id.h:378
aud
static int FUNC() aud(CodedBitstreamContext *ctx, RWContext *rw, H264RawAUD *current)
Definition: cbs_h264_syntax_template.c:842
AVIOContext
Bytestream IO Context.
Definition: avio.h:166
AVPacket::size
int size
Definition: packet.h:523
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:106
StrChannel::tmp_pkt
AVPacket tmp_pkt
Definition: psxstr.c:58
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:57
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
av_channel_layout_default
void av_channel_layout_default(AVChannelLayout *ch_layout, int nb_channels)
Get the default channel layout for a given number of channels.
Definition: channel_layout.c:1033
RIFF_TAG
#define RIFF_TAG
Definition: psxstr.c:38
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:245
internal.h
AVCodecParameters::height
int height
Definition: codec_par.h:122
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:178
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:841
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:278
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:847
channel_layout.h
CDXA_TYPE_EMPTY
#define CDXA_TYPE_EMPTY
Definition: psxstr.c:51
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:659
AVPacket::stream_index
int stream_index
Definition: packet.h:524
str_read_header
static int str_read_header(AVFormatContext *s)
Definition: psxstr.c:130
StrDemuxContext::channels
StrChannel channels[32]
Definition: psxstr.c:67
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:29
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:499
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:542
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
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:890
channel
channel
Definition: ebur128.h:39
read
static uint32_t BS_FUNC() read(BSCTX *bc, unsigned int n)
Return n bits from the buffer, n has to be in the 0-32 range.
Definition: bitstream_template.h:231
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:393
str_read_close
static int str_read_close(AVFormatContext *s)
Definition: psxstr.c:293