FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
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(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++){
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;
161  StrDemuxContext *str = s->priv_data;
162  unsigned char sector[RAW_CD_SECTOR_SIZE];
163  int channel;
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");
215  av_packet_unref(pkt);
216  if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
217  return AVERROR(EIO);
218  memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE);
219 
220  pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
221  pkt->stream_index =
222  str->channels[channel].video_stream_index;
223  }
224 
225  memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
226  sector + VIDEO_DATA_HEADER_SIZE,
227  VIDEO_DATA_CHUNK_SIZE);
228 
229  if (current_sector == sector_count-1) {
230  pkt->size= frame_size;
231  *ret_pkt = *pkt;
232  pkt->data= NULL;
233  pkt->size= -1;
234  pkt->buf = NULL;
235  return 0;
236  }
237 
238  }
239  break;
240 
241  case CDXA_TYPE_AUDIO:
242  if(str->channels[channel].audio_stream_index < 0){
243  int fmt = sector[0x13];
244  /* allocate a new AVStream */
245  st = avformat_new_stream(s, NULL);
246  if (!st)
247  return AVERROR(ENOMEM);
248 
249  str->channels[channel].audio_stream_index = st->index;
250 
253  st->codecpar->codec_tag = 0; /* no fourcc */
254  if (fmt & 1) {
255  st->codecpar->channels = 2;
257  } else {
258  st->codecpar->channels = 1;
260  }
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->channels,
266  st->codecpar->sample_rate);
267  st->start_time = 0;
268  }
269  pkt = ret_pkt;
270  if (av_new_packet(pkt, 2304))
271  return AVERROR(EIO);
272  memcpy(pkt->data,sector+24,2304);
273 
274  pkt->stream_index =
275  str->channels[channel].audio_stream_index;
276  pkt->duration = 1;
277  return 0;
278  default:
279  av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
280  /* drop the sector and move on */
281  break;
282  }
283 
284  if (avio_feof(pb))
285  return AVERROR(EIO);
286  }
287 }
288 
290 {
291  StrDemuxContext *str = s->priv_data;
292  int i;
293  for(i=0; i<32; i++){
294  if(str->channels[i].tmp_pkt.data)
295  av_packet_unref(&str->channels[i].tmp_pkt);
296  }
297 
298  return 0;
299 }
300 
302  .name = "psxstr",
303  .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
304  .priv_data_size = sizeof(StrDemuxContext),
310 };
StrChannel channels[32]
Definition: psxstr.c:66
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
const char * fmt
Definition: avisynth_c.h:769
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1610
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:4504
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3953
int index
stream index in AVFormatContext
Definition: avformat.h:879
int size
Definition: avcodec.h:1591
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:230
#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:1376
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:1327
uint8_t
int width
Video only.
Definition: avcodec.h:4019
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1280
#define CDXA_TAG
Definition: psxstr.c:39
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVInputFormat ff_str_demuxer
Definition: psxstr.c:301
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1608
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4137
#define VIDEO_DATA_HEADER_SIZE
Definition: psxstr.c:44
uint8_t * data
Definition: avcodec.h:1590
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:511
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4055
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:604
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3949
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1573
#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:464
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
common internal API header
#define VIDEO_DATA_CHUNK_SIZE
Definition: psxstr.c:43
int block_align
Audio only.
Definition: avcodec.h:4070
audio channel layout utility functions
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
#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:514
Stream structure.
Definition: avformat.h:878
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(AVProbeData *p)
Definition: psxstr.c:71
int frame_size
Definition: mxfenc.c:1822
AVIOContext * pb
I/O context.
Definition: avformat.h:1369
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:563
static const uint8_t sync_header[12]
Definition: psxstr.c:69
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:471
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
static int flags
Definition: cpu.c:47
int video_stream_index
Definition: psxstr.c:56
int sample_rate
Audio only.
Definition: avcodec.h:4063
#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:925
static int str_read_close(AVFormatContext *s)
Definition: psxstr.c:289
#define AVFMT_NO_BYTE_SEEK
Format does not allow seeking by bytes.
Definition: avformat.h:494
void * priv_data
Format private data.
Definition: avformat.h:1355
int channels
Audio only.
Definition: avcodec.h:4059
void INT64 start
Definition: avisynth_c.h:690
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:662
AVCodecParameters * codecpar
Definition: avformat.h:1230
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3957
int stream_index
Definition: avcodec.h:1592
#define CDXA_TYPE_MASK
Definition: psxstr.c:47
#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: avcodec.h:1567