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/intreadwrite.h"
34 #include "avformat.h"
35 #include "internal.h"
36 
37 #define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
38 #define CDXA_TAG MKTAG('C', 'D', 'X', 'A')
39 
40 #define RAW_CD_SECTOR_SIZE 2352
41 #define RAW_CD_SECTOR_DATA_SIZE 2304
42 #define VIDEO_DATA_CHUNK_SIZE 0x7E0
43 #define VIDEO_DATA_HEADER_SIZE 0x38
44 #define RIFF_HEADER_SIZE 0x2C
45 
46 #define CDXA_TYPE_MASK 0x0E
47 #define CDXA_TYPE_DATA 0x08
48 #define CDXA_TYPE_AUDIO 0x04
49 #define CDXA_TYPE_VIDEO 0x02
50 
51 #define STR_MAGIC (0x80010160)
52 
53 typedef struct StrChannel {
54  /* video parameters */
57 
58  /* audio parameters */
60 } StrChannel;
61 
62 typedef struct StrDemuxContext {
63 
64  /* a STR file can contain up to 32 channels of data */
67 
68 static const char sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
69 
70 static int str_probe(AVProbeData *p)
71 {
72  uint8_t *sector= p->buf;
73 
75  return 0;
76 
77  if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
78  (AV_RL32(&p->buf[8]) == CDXA_TAG)) {
79 
80  /* RIFF header seen; skip 0x2C bytes */
81  sector += RIFF_HEADER_SIZE;
82  }
83 
84  /* look for CD sync header (00, 0xFF x 10, 00) */
85  if (memcmp(sector,sync_header,sizeof(sync_header)))
86  return 0;
87 
88  if(sector[0x11] >= 32)
89  return 0;
90  if( (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_VIDEO
91  && (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_AUDIO
92  && (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_DATA)
93  return 0;
94 
95  /* MPEG files (like those ripped from VCDs) can also look like this;
96  * only return half certainty */
97  return 50;
98 }
99 
101 {
102  AVIOContext *pb = s->pb;
103  StrDemuxContext *str = s->priv_data;
104  unsigned char sector[RAW_CD_SECTOR_SIZE];
105  int start;
106  int i;
107 
108  /* skip over any RIFF header */
109  if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
110  return AVERROR(EIO);
111  if (AV_RL32(&sector[0]) == RIFF_TAG)
112  start = RIFF_HEADER_SIZE;
113  else
114  start = 0;
115 
116  avio_seek(pb, start, SEEK_SET);
117 
118  for(i=0; i<32; i++){
120  str->channels[i].audio_stream_index= -1;
121  }
122 
124 
125  return 0;
126 }
127 
129  AVPacket *ret_pkt)
130 {
131  AVIOContext *pb = s->pb;
132  StrDemuxContext *str = s->priv_data;
133  unsigned char sector[RAW_CD_SECTOR_SIZE];
134  int channel;
135  AVPacket *pkt;
136  AVStream *st;
137 
138  while (1) {
139 
140  if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
141  return AVERROR(EIO);
142 
143  channel = sector[0x11];
144  if (channel >= 32)
145  return AVERROR_INVALIDDATA;
146 
147  switch (sector[0x12] & CDXA_TYPE_MASK) {
148 
149  case CDXA_TYPE_DATA:
150  case CDXA_TYPE_VIDEO:
151  {
152 
153  int current_sector = AV_RL16(&sector[0x1C]);
154  int sector_count = AV_RL16(&sector[0x1E]);
155  int frame_size = AV_RL32(&sector[0x24]);
156 
157  if(!( frame_size>=0
158  && current_sector < sector_count
159  && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
160  av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
161  break;
162  }
163 
164  if(str->channels[channel].video_stream_index < 0){
165  /* allocate a new AVStream */
166  st = avformat_new_stream(s, NULL);
167  if (!st)
168  return AVERROR(ENOMEM);
169  avpriv_set_pts_info(st, 64, 1, 15);
170 
171  str->channels[channel].video_stream_index = st->index;
172 
175  st->codec->codec_tag = 0; /* no fourcc */
176  st->codec->width = AV_RL16(&sector[0x28]);
177  st->codec->height = AV_RL16(&sector[0x2A]);
178  }
179 
180  /* if this is the first sector of the frame, allocate a pkt */
181  pkt = &str->channels[channel].tmp_pkt;
182 
183  if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
184  if(pkt->data)
185  av_log(s, AV_LOG_ERROR, "missmatching sector_count\n");
186  av_free_packet(pkt);
187  if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
188  return AVERROR(EIO);
189 
190  pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
191  pkt->stream_index =
192  str->channels[channel].video_stream_index;
193  }
194 
195  memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
196  sector + VIDEO_DATA_HEADER_SIZE,
197  VIDEO_DATA_CHUNK_SIZE);
198 
199  if (current_sector == sector_count-1) {
200  pkt->size= frame_size;
201  *ret_pkt = *pkt;
202  pkt->data= NULL;
203  pkt->size= -1;
204  return 0;
205  }
206 
207  }
208  break;
209 
210  case CDXA_TYPE_AUDIO:
211  if(str->channels[channel].audio_stream_index < 0){
212  int fmt = sector[0x13];
213  /* allocate a new AVStream */
214  st = avformat_new_stream(s, NULL);
215  if (!st)
216  return AVERROR(ENOMEM);
217 
218  str->channels[channel].audio_stream_index = st->index;
219 
222  st->codec->codec_tag = 0; /* no fourcc */
223  if (fmt & 1) {
224  st->codec->channels = 2;
226  } else {
227  st->codec->channels = 1;
229  }
230  st->codec->sample_rate = (fmt&4)?18900:37800;
231  // st->codec->bit_rate = 0; //FIXME;
232  st->codec->block_align = 128;
233 
234  avpriv_set_pts_info(st, 64, 18 * 224 / st->codec->channels,
235  st->codec->sample_rate);
236  st->start_time = 0;
237  }
238  pkt = ret_pkt;
239  if (av_new_packet(pkt, 2304))
240  return AVERROR(EIO);
241  memcpy(pkt->data,sector+24,2304);
242 
243  pkt->stream_index =
244  str->channels[channel].audio_stream_index;
245  pkt->duration = 1;
246  return 0;
247  default:
248  av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
249  /* drop the sector and move on */
250  break;
251  }
252 
253  if (pb->eof_reached)
254  return AVERROR(EIO);
255  }
256 }
257 
259 {
260  StrDemuxContext *str = s->priv_data;
261  int i;
262  for(i=0; i<32; i++){
263  if(str->channels[i].tmp_pkt.data)
264  av_free_packet(&str->channels[i].tmp_pkt);
265  }
266 
267  return 0;
268 }
269 
271  .name = "psxstr",
272  .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
273  .priv_data_size = sizeof(StrDemuxContext),
279 };
StrChannel channels[32]
Definition: psxstr.c:65
Bytestream IO Context.
Definition: avio.h:68
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:153
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:940
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:3283
int index
stream index in AVFormatContext
Definition: avformat.h:623
int size
Definition: avcodec.h:916
static int str_read_header(AVFormatContext *s)
Definition: psxstr.c:100
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:47
int audio_stream_index
Definition: psxstr.c:59
#define AV_CH_LAYOUT_STEREO
int ctx_flags
Format-specific flags, see AVFMTCTX_xx.
Definition: avformat.h:864
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2141
Format I/O context.
Definition: avformat.h:828
uint8_t
#define CDXA_TAG
Definition: psxstr.c:38
AVInputFormat ff_str_demuxer
Definition: psxstr.c:270
#define VIDEO_DATA_HEADER_SIZE
Definition: psxstr.c:43
uint8_t * data
Definition: avcodec.h:915
static int flags
Definition: log.c:42
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:937
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:446
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:56
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
#define RIFF_TAG
Definition: psxstr.c:37
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
AVStream * avformat_new_stream(AVFormatContext *s, AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2736
#define RAW_CD_SECTOR_SIZE
Definition: psxstr.c:40
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2165
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:641
static const char sync_header[12]
Definition: psxstr.c:68
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:341
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:340
#define VIDEO_DATA_CHUNK_SIZE
Definition: psxstr.c:42
audio channel layout utility functions
struct StrDemuxContext StrDemuxContext
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:54
int width
picture width / height.
Definition: avcodec.h:1508
#define CDXA_TYPE_VIDEO
Definition: psxstr.c:49
#define AV_RL32
Definition: intreadwrite.h:146
#define RIFF_HEADER_SIZE
Definition: psxstr.c:44
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:536
Stream structure.
Definition: avformat.h:622
AVPacket tmp_pkt
Definition: psxstr.c:56
static int str_read_packet(AVFormatContext *s, AVPacket *ret_pkt)
Definition: psxstr.c:128
NULL
Definition: eval.c:52
static int str_probe(AVProbeData *p)
Definition: psxstr.c:70
enum AVMediaType codec_type
Definition: avcodec.h:1347
enum AVCodecID codec_id
Definition: avcodec.h:1350
int sample_rate
samples per second
Definition: avcodec.h:2104
AVIOContext * pb
I/O context.
Definition: avformat.h:861
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1365
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
This structure contains the data a format has to probe a file.
Definition: avformat.h:338
int video_stream_index
Definition: psxstr.c:55
#define CDXA_TYPE_AUDIO
Definition: psxstr.c:48
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:677
static int str_read_close(AVFormatContext *s)
Definition: psxstr.c:258
int eof_reached
true if eof reached
Definition: avio.h:96
int channels
number of audio channels
Definition: avcodec.h:2105
void * priv_data
Format private data.
Definition: avformat.h:848
struct StrChannel StrChannel
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:455
int stream_index
Definition: avcodec.h:917
#define CDXA_TYPE_MASK
Definition: psxstr.c:46
#define AV_CH_LAYOUT_MONO
This structure stores compressed data.
Definition: avcodec.h:898