FFmpeg
psxstr.c
Go to the documentation of this file.
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;
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++){
149  str->channels[i].audio_stream_index= -1;
150  }
151 
153 
154  return 0;
155 }
156 
158  AVPacket *ret_pkt)
159 {
160  AVIOContext *pb = s->pb;
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 
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");
215  av_packet_unref(pkt);
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 
221  pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
222  pkt->stream_index =
224  }
225 
226  memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
227  sector + VIDEO_DATA_HEADER_SIZE,
228  VIDEO_DATA_CHUNK_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 
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 =
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 {
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 };
StrChannel channels[32]
Definition: psxstr.c:66
#define NULL
Definition: coverity.c:32
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:383
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:4869
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:364
static int str_read_header(AVFormatContext *s)
Definition: psxstr.c:129
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define CDXA_TYPE_DATA
Definition: psxstr.c:48
int audio_stream_index
Definition: psxstr.c:60
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
Format I/O context.
Definition: avformat.h:1351
uint8_t
int width
Video only.
Definition: codec_par.h:126
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1295
#define CDXA_TAG
Definition: psxstr.c:39
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
AVInputFormat ff_str_demuxer
Definition: psxstr.c:302
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:381
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4450
#define VIDEO_DATA_HEADER_SIZE
Definition: psxstr.c:44
uint8_t * data
Definition: packet.h:363
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
channels
Definition: aptx.h:33
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:637
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:346
#define RIFF_TAG
Definition: psxstr.c:38
#define RAW_CD_SECTOR_SIZE
Definition: psxstr.c:41
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
common internal API header
#define VIDEO_DATA_CHUNK_SIZE
Definition: psxstr.c:43
int block_align
Audio only.
Definition: codec_par.h:177
audio channel layout utility functions
#define s(width, name)
Definition: cbs_vp9.c:257
#define CDXA_TYPE_VIDEO
Definition: psxstr.c:50
#define RIFF_HEADER_SIZE
Definition: psxstr.c:45
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
Stream structure.
Definition: avformat.h:876
AVPacket tmp_pkt
Definition: psxstr.c:57
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
static int str_read_packet(AVFormatContext *s, AVPacket *ret_pkt)
Definition: psxstr.c:157
static int str_probe(const AVProbeData *p)
Definition: psxstr.c:71
int frame_size
Definition: mxfenc.c:2166
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:606
static int FUNC() aud(CodedBitstreamContext *ctx, RWContext *rw, H264RawAUD *current)
static const uint8_t sync_header[12]
Definition: psxstr.c:69
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
#define flags(name, subs,...)
Definition: cbs_av1.c:560
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int video_stream_index
Definition: psxstr.c:56
int sample_rate
Audio only.
Definition: codec_par.h:170
#define CDXA_TYPE_AUDIO
Definition: psxstr.c:49
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:915
channel
Use these values when setting the channel map with ebur128_set_channel().
Definition: ebur128.h:39
static int str_read_close(AVFormatContext *s)
Definition: psxstr.c:290
#define AVFMT_NO_BYTE_SEEK
Format does not allow seeking by bytes.
Definition: avformat.h:470
void * priv_data
Format private data.
Definition: avformat.h:1379
int channels
Audio only.
Definition: codec_par.h:166
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:368
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
int stream_index
Definition: packet.h:365
#define CDXA_TYPE_MASK
Definition: psxstr.c:47
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
#define AV_CH_LAYOUT_MONO
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: packet.h:340
int i
Definition: input.c:407