Libav
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 Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
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 char 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  uint8_t *sector= p->buf;
74 
76  return 0;
77 
78  if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
79  (AV_RL32(&p->buf[8]) == CDXA_TAG)) {
80 
81  /* RIFF header seen; skip 0x2C bytes */
82  sector += RIFF_HEADER_SIZE;
83  }
84 
85  /* look for CD sync header (00, 0xFF x 10, 00) */
86  if (memcmp(sector,sync_header,sizeof(sync_header)))
87  return 0;
88 
89  if(sector[0x11] >= 32)
90  return 0;
91  if( (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_VIDEO
92  && (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_AUDIO
93  && (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_DATA)
94  return 0;
95 
96  /* MPEG files (like those ripped from VCDs) can also look like this;
97  * only return half certainty */
99 }
100 
102 {
103  AVIOContext *pb = s->pb;
104  StrDemuxContext *str = s->priv_data;
105  unsigned char sector[RAW_CD_SECTOR_SIZE];
106  int start;
107  int i;
108 
109  /* skip over any RIFF header */
110  if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
111  return AVERROR(EIO);
112  if (AV_RL32(&sector[0]) == RIFF_TAG)
113  start = RIFF_HEADER_SIZE;
114  else
115  start = 0;
116 
117  avio_seek(pb, start, SEEK_SET);
118 
119  for(i=0; i<32; i++){
121  str->channels[i].audio_stream_index= -1;
122  }
123 
125 
126  return 0;
127 }
128 
130  AVPacket *ret_pkt)
131 {
132  AVIOContext *pb = s->pb;
133  StrDemuxContext *str = s->priv_data;
134  unsigned char sector[RAW_CD_SECTOR_SIZE];
135  int channel;
136  AVPacket *pkt;
137  AVStream *st;
138 
139  while (1) {
140 
141  if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
142  return AVERROR(EIO);
143 
144  channel = sector[0x11];
145  if (channel >= 32)
146  return AVERROR_INVALIDDATA;
147 
148  switch (sector[0x12] & CDXA_TYPE_MASK) {
149 
150  case CDXA_TYPE_DATA:
151  case CDXA_TYPE_VIDEO:
152  {
153 
154  int current_sector = AV_RL16(&sector[0x1C]);
155  int sector_count = AV_RL16(&sector[0x1E]);
156  int frame_size = AV_RL32(&sector[0x24]);
157 
158  if(!( frame_size>=0
159  && current_sector < sector_count
160  && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
161  av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
162  break;
163  }
164 
165  if(str->channels[channel].video_stream_index < 0){
166  /* allocate a new AVStream */
167  st = avformat_new_stream(s, NULL);
168  if (!st)
169  return AVERROR(ENOMEM);
170  avpriv_set_pts_info(st, 64, 1, 15);
171 
172  str->channels[channel].video_stream_index = st->index;
173 
176  st->codec->codec_tag = 0; /* no fourcc */
177  st->codec->width = AV_RL16(&sector[0x28]);
178  st->codec->height = AV_RL16(&sector[0x2A]);
179  }
180 
181  /* if this is the first sector of the frame, allocate a pkt */
182  pkt = &str->channels[channel].tmp_pkt;
183 
184  if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
185  if(pkt->data)
186  av_log(s, AV_LOG_ERROR, "missmatching sector_count\n");
187  av_free_packet(pkt);
188  if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
189  return AVERROR(EIO);
190 
191  pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
192  pkt->stream_index =
193  str->channels[channel].video_stream_index;
194  }
195 
196  memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
197  sector + VIDEO_DATA_HEADER_SIZE,
198  VIDEO_DATA_CHUNK_SIZE);
199 
200  if (current_sector == sector_count-1) {
201  pkt->size= frame_size;
202  *ret_pkt = *pkt;
203  pkt->data= NULL;
204  pkt->size= -1;
205  pkt->buf = NULL;
206 #if FF_API_DESTRUCT_PACKET
208  pkt->destruct = NULL;
210 #endif
211  return 0;
212  }
213 
214  }
215  break;
216 
217  case CDXA_TYPE_AUDIO:
218  if(str->channels[channel].audio_stream_index < 0){
219  int fmt = sector[0x13];
220  /* allocate a new AVStream */
221  st = avformat_new_stream(s, NULL);
222  if (!st)
223  return AVERROR(ENOMEM);
224 
225  str->channels[channel].audio_stream_index = st->index;
226 
229  st->codec->codec_tag = 0; /* no fourcc */
230  if (fmt & 1) {
231  st->codec->channels = 2;
233  } else {
234  st->codec->channels = 1;
236  }
237  st->codec->sample_rate = (fmt&4)?18900:37800;
238  // st->codec->bit_rate = 0; //FIXME;
239  st->codec->block_align = 128;
240 
241  avpriv_set_pts_info(st, 64, 18 * 224 / st->codec->channels,
242  st->codec->sample_rate);
243  st->start_time = 0;
244  }
245  pkt = ret_pkt;
246  if (av_new_packet(pkt, 2304))
247  return AVERROR(EIO);
248  memcpy(pkt->data,sector+24,2304);
249 
250  pkt->stream_index =
251  str->channels[channel].audio_stream_index;
252  pkt->duration = 1;
253  return 0;
254  default:
255  av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
256  /* drop the sector and move on */
257  break;
258  }
259 
260  if (pb->eof_reached)
261  return AVERROR(EIO);
262  }
263 }
264 
266 {
267  StrDemuxContext *str = s->priv_data;
268  int i;
269  for(i=0; i<32; i++){
270  if(str->channels[i].tmp_pkt.data)
271  av_free_packet(&str->channels[i].tmp_pkt);
272  }
273 
274  return 0;
275 }
276 
278  .name = "psxstr",
279  .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
280  .priv_data_size = sizeof(StrDemuxContext),
286 };
StrChannel channels[32]
Definition: psxstr.c:66
Bytestream IO Context.
Definition: avio.h:68
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:243
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:998
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:2829
int index
stream index in AVFormatContext
Definition: avformat.h:700
int size
Definition: avcodec.h:974
static int str_read_header(AVFormatContext *s)
Definition: psxstr.c:101
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:186
#define AV_RL16
Definition: intreadwrite.h:42
#define CDXA_TYPE_DATA
Definition: psxstr.c:48
int audio_stream_index
Definition: psxstr.c:60
#define AV_CH_LAYOUT_STEREO
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:971
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:1844
Format I/O context.
Definition: avformat.h:922
uint8_t
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:901
attribute_deprecated void(* destruct)(struct AVPacket *)
Definition: avcodec.h:994
#define CDXA_TAG
Definition: psxstr.c:39
AVInputFormat ff_str_demuxer
Definition: psxstr.c:277
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
#define VIDEO_DATA_HEADER_SIZE
Definition: psxstr.c:44
uint8_t * data
Definition: avcodec.h:973
static int flags
Definition: log.c:44
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:219
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:991
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:452
static const uint8_t frame_size[4]
Definition: g723_1_data.h:47
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:81
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
#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:145
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:956
#define RIFF_TAG
Definition: psxstr.c:38
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
#define RAW_CD_SECTOR_SIZE
Definition: psxstr.c:41
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1868
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
static const char sync_header[12]
Definition: psxstr.c:69
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:398
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:397
common internal API header
#define VIDEO_DATA_CHUNK_SIZE
Definition: psxstr.c:43
audio channel layout utility functions
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
int width
picture width / height.
Definition: avcodec.h:1229
#define CDXA_TYPE_VIDEO
Definition: psxstr.c:50
#define AV_RL32
Definition: intreadwrite.h:146
#define RIFF_HEADER_SIZE
Definition: psxstr.c:45
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:544
Stream structure.
Definition: avformat.h:699
AVPacket tmp_pkt
Definition: psxstr.c:57
static int str_read_packet(AVFormatContext *s, AVPacket *ret_pkt)
Definition: psxstr.c:129
NULL
Definition: eval.c:55
static int str_probe(AVProbeData *p)
Definition: psxstr.c:71
enum AVMediaType codec_type
Definition: avcodec.h:1058
enum AVCodecID codec_id
Definition: avcodec.h:1067
int sample_rate
samples per second
Definition: avcodec.h:1807
AVIOContext * pb
I/O context.
Definition: avformat.h:964
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1082
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:402
This structure contains the data a format has to probe a file.
Definition: avformat.h:395
int video_stream_index
Definition: psxstr.c:56
#define CDXA_TYPE_AUDIO
Definition: psxstr.c:49
Main libavformat public API header.
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:76
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:749
static int str_read_close(AVFormatContext *s)
Definition: psxstr.c:265
#define AVFMT_NO_BYTE_SEEK
Format does not allow seeking by bytes.
Definition: avformat.h:424
int eof_reached
true if eof reached
Definition: avio.h:96
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:77
int channels
number of audio channels
Definition: avcodec.h:1808
void * priv_data
Format private data.
Definition: avformat.h:950
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525
int stream_index
Definition: avcodec.h:975
#define CDXA_TYPE_MASK
Definition: psxstr.c:47
#define AV_CH_LAYOUT_MONO
This structure stores compressed data.
Definition: avcodec.h:950