nihav-commonfmt/src/demuxers/avi.rs

   1 use nihav_core::demuxers::*;
   2 use nihav_registry::register;
   3 use nihav_core::demuxers::DemuxerError::*;
   4 use std::str::FromStr;
   5
   6 macro_rules! mktag {
   7     ($a:expr, $b:expr, $c:expr, $d:expr) => ({
   8         (($a as u32) << 24) | (($b as u32) << 16) | (($c as u32) << 8) | ($d as u32)
   9     });
  10     ($arr:expr) => ({
  11         (($arr[0] as u32) << 24) | (($arr[1] as u32) << 16) | (($arr[2] as u32) << 8) | ($arr[3] as u32)
  12     });
  13 }
  14
  15 struct StreamState {
  16     strm_no:    u8,
  17     got_strf:   bool,
  18     strm_type:  Option<StreamType>,
  19 }
  20
  21 impl StreamState {
  22     fn new() -> Self {
  23         StreamState { strm_no: 0, got_strf: true, strm_type: None }
  24     }
  25     fn reset(&mut self) {
  26         self.strm_type = None;
  27         self.got_strf  = true;
  28         self.strm_no  += 1;
  29     }
  30     fn valid_state(&self) -> bool {
  31         match self.strm_type {
  32             None => self.got_strf,
  33             _    => false,
  34         }
  35     }
  36 }
  37
  38 struct PalInfo {
  39     pal:        Arc<[u8; 1024]>,
  40     changed:    bool,
  41     stream_no:  usize,
  42 }
  43
  44 #[derive(Clone,Copy,Default)]
  45 struct RIFFSegment {
  46     pos:        u64,
  47     size:       usize,
  48     movi_pos:   u64,
  49     movi_size:  usize,
  50 }
  51
  52 impl RIFFSegment {
  53     fn contains(&self, pos: u64) -> bool {
  54         pos >= self.movi_pos && pos < self.movi_pos + (self.movi_size as u64)
  55     }
  56     fn get_end(&self) -> u64 {
  57         self.pos + (self.size as u64)
  58     }
  59 }
  60
  61 #[allow(dead_code)]
  62 struct AVIDemuxer<'a> {
  63     src:            &'a mut ByteReader<'a>,
  64     cur_frame:      Vec<u64>,
  65     num_streams:    u8,
  66     size:           usize,
  67     movi_size:      usize,
  68     movi_pos:       u64,
  69     movi_orig:      usize,
  70     sstate:         StreamState,
  71     tb_num:         u32,
  72     tb_den:         u32,
  73     strm_duration:  u32,
  74     key_offs:       Vec<u64>,
  75     pal:            Vec<PalInfo>,
  76     odml:           bool,
  77     odml_idx:       Vec<u64>,
  78     odml_riff:      Vec<RIFFSegment>,
  79 }
  80
  81 #[derive(Debug,Clone,Copy,PartialEq)]
  82 enum RIFFTag {
  83     Chunk(u32),
  84     List(u32,u32),
  85 }
  86
  87 struct RIFFParser {
  88     tag:   RIFFTag,
  89     parse: fn(&mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize>,
  90 }
  91
  92 impl<'a> DemuxCore<'a> for AVIDemuxer<'a> {
  93     fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> {
  94         self.read_header(strmgr, seek_index)?;
  95         Ok(())
  96     }
  97
  98     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
  99         if self.movi_size == 0 {
 100             if !self.odml {
 101                 return Err(EOF);
 102             }
 103             self.try_next_odml_chunk()?;
 104         }
 105         let mut tag: [u8; 4] = [0; 4];
 106         loop {
 107             if (self.src.tell() & 1) == 1 {
 108                 self.src.read_skip(1)?;
 109                 self.movi_size -= 1;
 110                 if self.movi_size == 0 {
 111                     if !self.odml {
 112                         return Err(EOF);
 113                     }
 114                     self.try_next_odml_chunk()?;
 115                 }
 116             }
 117             let is_keyframe = self.key_offs.binary_search(&self.src.tell()).is_ok();
 118             self.src.read_buf(&mut tag)?;
 119             let size = self.src.read_u32le()? as usize;
 120             if mktag!(tag) == mktag!(b"JUNK") {
 121                 self.movi_size -= size + 8;
 122                 self.src.read_skip(size)?;
 123                 if self.movi_size == 0 {
 124                     if !self.odml {
 125                         return Err(EOF);
 126                     }
 127                     self.try_next_odml_chunk()?;
 128                 }
 129                 continue;
 130             }
 131             if mktag!(tag) == mktag!(b"LIST") {
 132                 self.movi_size -= 12;
 133                 self.src.read_skip(4)?;
 134                 if self.movi_size == 0 {
 135                     if !self.odml {
 136                         return Err(EOF);
 137                     }
 138                     self.try_next_odml_chunk()?;
 139                 }
 140                 continue;
 141             }
 142             if (tag[0] == b'i' && tag[1] == b'x') || (&tag == b"idx1") {
 143                 if !self.odml {
 144                     return Err(EOF);
 145                 }
 146                 self.src.read_skip(size)?;
 147                 self.try_next_odml_chunk()?;
 148                 continue;
 149             }
 150             if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' {
 151                 return Err(InvalidData);
 152             }
 153             let stream_no = (tag[0] - b'0') * 10 + (tag[1] - b'0');
 154             if tag[2] == b'p' && tag[3] == b'c' {
 155                 self.parse_palette_change(stream_no as usize, size)?;
 156                 self.movi_size -= size;
 157                 if self.movi_size == 0 {
 158                     if !self.odml {
 159                         return Err(EOF);
 160                     }
 161                     self.try_next_odml_chunk()?;
 162                 }
 163                 continue;
 164             }
 165             let str = strmgr.get_stream(stream_no as usize);
 166             if str.is_none() { return Err(InvalidData); }
 167             let stream = str.unwrap();
 168             if size == 0 {
 169                 self.movi_size -= 8;
 170                 if self.movi_size == 0 {
 171                     if !self.odml {
 172                         return Err(EOF);
 173                     }
 174                     self.try_next_odml_chunk()?;
 175                 }
 176                 continue;
 177             }
 178             let (tb_num, tb_den) = stream.get_timebase();
 179             let mut ts = NATimeInfo::new(Some(self.cur_frame[stream_no as usize]), None, None, tb_num, tb_den);
 180             if stream.get_media_type() == StreamType::Audio && tb_num == 1 && stream.get_info().get_name() == "pcm" {
 181                 ts.pts = None;
 182             }
 183             let mut pkt = self.src.read_packet(stream, ts, is_keyframe, size)?;
 184             for pe in self.pal.iter_mut() {
 185                 if pe.stream_no == (stream_no as usize) {
 186                     pkt.add_side_data(NASideData::Palette(pe.changed, pe.pal.clone()));
 187                     pe.changed = false;
 188                     break;
 189                 }
 190             }
 191             self.cur_frame[stream_no as usize] += 1;
 192             self.movi_size -= size + 8;
 193
 194             return Ok(pkt);
 195         }
 196     }
 197
 198     fn seek(&mut self, time: NATimePoint, seek_index: &SeekIndex) -> DemuxerResult<()> {
 199         let ret = seek_index.find_pos(time);
 200         if ret.is_none() {
 201             return Err(DemuxerError::SeekError);
 202         }
 203         let seek_info = ret.unwrap();
 204
 205         if self.odml && ((seek_info.pos < self.movi_pos) || (seek_info.pos > self.movi_pos + (self.movi_orig as u64))) {
 206             let mut found = false;
 207             for riff_seg in self.odml_riff.iter() {
 208                 if riff_seg.contains(seek_info.pos) {
 209                     found = true;
 210                     self.movi_pos = riff_seg.movi_pos;
 211                     self.movi_orig = riff_seg.movi_size;
 212                     self.movi_size = riff_seg.movi_size;
 213                     break;
 214                 }
 215             }
 216             if !found {
 217                 let riff_seg = self.odml_riff.last().unwrap();
 218                 self.src.seek(SeekFrom::Start(riff_seg.get_end()))?;
 219                 loop {
 220                     let ret = self.try_next_odml_chunk();
 221                     if ret.is_err() {
 222                         return Err(DemuxerError::SeekError);
 223                     }
 224                     let riff_seg = self.odml_riff.last().unwrap();
 225                     if riff_seg.contains(seek_info.pos) {
 226                         self.movi_pos = riff_seg.movi_pos;
 227                         self.movi_orig = riff_seg.movi_size;
 228                         self.movi_size = riff_seg.movi_size;
 229                         break;
 230                     }
 231                     self.src.seek(SeekFrom::Start(riff_seg.get_end()))?;
 232                 }
 233             }
 234         }
 235         if seek_info.pos < self.movi_pos { return Err(DemuxerError::SeekError); }
 236         let skip_size = (seek_info.pos - self.movi_pos) as usize;
 237         if skip_size > self.movi_size { return Err(DemuxerError::SeekError); }
 238         self.movi_size = self.movi_orig - skip_size;
 239
 240         self.cur_frame[seek_info.str_id as usize] = seek_info.pts;
 241         self.src.seek(SeekFrom::Start(seek_info.pos))?;
 242
 243         Ok(())
 244     }
 245     fn get_duration(&self) -> u64 { 0 }
 246 }
 247
 248 impl<'a> NAOptionHandler for AVIDemuxer<'a> {
 249     fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
 250     fn set_options(&mut self, _options: &[NAOption]) { }
 251     fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
 252 }
 253
 254 impl<'a> AVIDemuxer<'a> {
 255     fn new(io: &'a mut ByteReader<'a>) -> Self {
 256         AVIDemuxer {
 257             cur_frame: Vec::new(),
 258             num_streams: 0,
 259             src: io,
 260             size: 0,
 261             movi_size: 0,
 262             movi_pos:  0,
 263             movi_orig: 0,
 264             sstate: StreamState::new(),
 265             tb_num: 0,
 266             tb_den: 0,
 267             strm_duration: 0,
 268             key_offs: Vec::new(),
 269             pal: Vec::new(),
 270             odml: false,
 271             odml_idx: Vec::new(),
 272             odml_riff: Vec::with_capacity(1),
 273         }
 274     }
 275
 276     fn parse_chunk(&mut self, strmgr: &mut StreamManager, end_tag: RIFFTag, csize: usize, depth: u16) -> DemuxerResult<(usize, bool)> {
 277         if csize < 8 { return Err(InvalidData); }
 278         if depth > 42 { return Err(InvalidData); }
 279
 280         let tag  = self.src.read_u32be()?;
 281         let size = self.src.read_u32le()? as usize;
 282         if size > csize { return Err(InvalidData); }
 283         if RIFFTag::Chunk(tag) == end_tag {
 284             return Ok((size, true));
 285         }
 286         let is_list = is_list_tag(tag);
 287         let ltag = if is_list { self.src.read_u32be()? } else { 0 };
 288         if RIFFTag::List(tag, ltag) == end_tag {
 289             return Ok((size, true));
 290         }
 291
 292         for chunk in CHUNKS.iter() {
 293             if RIFFTag::Chunk(tag) == chunk.tag {
 294                 let psize = (chunk.parse)(self, strmgr, size)?;
 295                 if psize != size { return Err(InvalidData); }
 296                 if (psize & 1) == 1 { self.src.read_skip(1)?; }
 297                 return Ok((size + 8, false));
 298             }
 299             if RIFFTag::List(tag, ltag) == chunk.tag {
 300                 let mut rest_size = size - 4;
 301                 let psize = (chunk.parse)(self, strmgr, rest_size)?;
 302                 if psize > rest_size { return Err(InvalidData); }
 303                 rest_size -= psize;
 304                 while rest_size > 0 {
 305                     let (psize, _) = self.parse_chunk(strmgr, end_tag, rest_size, depth+1)?;
 306                     if psize > rest_size { return Err(InvalidData); }
 307                     rest_size -= psize;
 308                     if ((psize & 1) == 1) && (rest_size > 0) {
 309                         rest_size -= 1;
 310                     }
 311                 }
 312
 313                 return Ok((size + 8, false));
 314             }
 315         }
 316         if !is_list {
 317             self.src.read_skip(size)?;
 318         } else {
 319             if size < 4 { return Err(InvalidData); }
 320             self.src.read_skip(size - 4)?;
 321         }
 322         if (size & 1) == 1 { self.src.read_skip(1)?; }
 323         Ok((size + 8, false))
 324     }
 325
 326     fn read_header(&mut self, strmgr: &mut StreamManager, seek_idx: &mut SeekIndex) -> DemuxerResult<()> {
 327         let riff_tag = self.src.read_u32be()?;
 328         let size     = self.src.read_u32le()? as usize;
 329         self.odml_riff.push(RIFFSegment { pos: self.src.tell() - 8, size: size + 8, movi_pos: 0, movi_size: 0});
 330         let avi_tag  = self.src.read_u32be()?;
 331         let mut matches = false;
 332         for rt in RIFF_TAGS.iter() {
 333             if rt[0] == riff_tag && rt[1] == avi_tag {
 334                 matches = true;
 335                 break;
 336             }
 337         }
 338         if !matches {
 339             return Err(InvalidData);
 340         }
 341         self.size = size;
 342         let mut rest_size = size;
 343         loop {
 344             let (csz, end) = self.parse_chunk(strmgr, RIFFTag::List(mktag!(b"LIST"), mktag!(b"movi")), rest_size,0)?;
 345             if end {
 346                 self.movi_size = csz - 4;
 347                 self.movi_orig = self.movi_size;
 348                 self.movi_pos = self.src.tell();
 349
 350                 self.odml_riff[0].movi_pos  = self.movi_pos;
 351                 self.odml_riff[0].movi_size = self.movi_size;
 352                 break;
 353             }
 354             rest_size -= csz;
 355         }
 356         if !seek_idx.skip_index {
 357             if !self.odml {
 358                 self.src.read_skip(self.movi_size)?;
 359                 while rest_size > 0 {
 360                     let ret = self.parse_chunk(strmgr, RIFFTag::Chunk(mktag!(b"idx1")), rest_size,0);
 361                     if ret.is_err() { break; }
 362                     let (csz, end) = ret.unwrap();
 363                     if end {
 364                         let _res = parse_idx1(self.src, strmgr, seek_idx, csz, self.movi_pos, &mut self.key_offs);
 365                         break;
 366                     }
 367                     rest_size -= csz;
 368                 }
 369             } else {
 370                 let mut start = 0;
 371                 let mut last_strm_no = 255;
 372                 for &offset in self.odml_idx.iter() {
 373                     if self.src.seek(SeekFrom::Start(offset)).is_err() {
 374                         break;
 375                     }
 376                     let ret = self.src.read_tag();
 377                     if ret.is_err() { break; }
 378                     let tag = ret.unwrap();
 379                     let ret = self.src.read_u32le();
 380                     if ret.is_err() { break; }
 381                     let size = ret.unwrap() as usize;
 382                     if &tag[..2] != b"ix" || tag[2] < b'0' || tag[2] > b'9' || tag[3] < b'0' || tag[3] > b'9'{
 383                         break;
 384                     }
 385                     let stream_no = ((tag[2] - b'0') * 10 + (tag[3] - b'0')) as usize;
 386
 387                     if last_strm_no != stream_no {
 388                         start = 0;
 389                         last_strm_no = stream_no;
 390                     }
 391                     let ret = parse_odml_ix(self.src, strmgr, seek_idx, stream_no, size, start);
 392                     if let Ok(new_start) = ret {
 393                         start = new_start;
 394                     } else {
 395                         break;
 396                     }
 397                 }
 398             }
 399         }
 400         if self.movi_pos != 0 {
 401             self.src.seek(SeekFrom::Start(self.movi_pos))?;
 402         } else {
 403             return Err(InvalidData);
 404         }
 405         if !self.sstate.valid_state() || self.sstate.strm_no != self.num_streams {
 406             return Err(InvalidData);
 407         }
 408         Ok(())
 409     }
 410
 411     fn read_extradata(&mut self, size: usize) -> DemuxerResult<Option<Vec<u8>>> {
 412         if size == 0 { return Ok(None); }
 413         let mut edvec: Vec<u8> = vec![0; size];
 414         self.src.read_buf(&mut edvec)?;
 415         Ok(Some(edvec))
 416     }
 417
 418     fn parse_palette_change(&mut self, stream_no: usize, size: usize) -> DemuxerResult<()> {
 419         for pe in self.pal.iter_mut() {
 420             if pe.stream_no == stream_no {
 421                 let start_clr           = self.src.read_byte()? as usize;
 422                 let len                 = self.src.read_byte()? as usize;
 423                 let _flags              = self.src.read_u16le()?;
 424                 validate!(start_clr + len <= 256);
 425                 validate!(len * 4 + 4 == size);
 426                 let mut newpal = *pe.pal;
 427                 for i in start_clr..(start_clr + len) {
 428                     newpal[i * 4]       = self.src.read_byte()?;
 429                     newpal[i * 4 + 1]   = self.src.read_byte()?;
 430                     newpal[i * 4 + 2]   = self.src.read_byte()?;
 431                     newpal[i * 4 + 3]   = 0;
 432                                           self.src.read_byte()?; // flags
 433                 }
 434                 pe.pal = Arc::new(newpal);
 435                 pe.changed = true;
 436                 return Ok(());
 437             }
 438         }
 439         self.src.read_skip(size)?;
 440         Ok(())
 441     }
 442     fn try_next_odml_chunk(&mut self) -> DemuxerResult<()> {
 443         let last_seg = self.odml_riff.last().unwrap();
 444         if self.src.tell() < last_seg.get_end() {
 445             for riff_seg in self.odml_riff.iter() {
 446                 if riff_seg.pos >= self.src.tell() {
 447                     self.src.seek(SeekFrom::Start(riff_seg.movi_pos))?;
 448                     self.movi_pos = riff_seg.movi_pos;
 449                     self.movi_size = riff_seg.movi_size;
 450                     return Ok(());
 451                 }
 452             }
 453         }
 454         self.src.seek(SeekFrom::Start(last_seg.get_end()))?;
 455
 456         let riff_pos = self.src.tell();
 457         let ret = self.src.read_tag();
 458         if let Ok([b'R', b'I', b'F', b'F']) = ret {
 459         } else {
 460             return Err(DemuxerError::EOF);
 461         }
 462         let riff_size = self.src.read_u32le()? as usize;
 463         let tag = self.src.read_tag()?;
 464         validate!(&tag == b"AVIX");
 465         let tag = self.src.read_tag()?;
 466         validate!(&tag == b"LIST");
 467         let list_size = self.src.read_u32le()? as usize;
 468         validate!(list_size >= 4);
 469         let tag = self.src.read_tag()?;
 470         validate!(&tag == b"movi");
 471         self.odml_riff.push(RIFFSegment{ pos: riff_pos, size: riff_size + 8, movi_pos: riff_pos + 24, movi_size: list_size - 4});
 472         self.movi_pos = riff_pos + 24;
 473         self.movi_size = list_size - 4;
 474         self.movi_orig = self.movi_size;
 475
 476         Ok(())
 477     }
 478 }
 479
 480 const RIFF_TAGS: &[[u32; 2]] = &[
 481     [ mktag!(b"RIFF"), mktag!(b"AVI ") ],
 482     [ mktag!(b"RIFF"), mktag!(b"AVIX") ],
 483     [ mktag!(b"ON2 "), mktag!(b"ON2f") ],
 484 ];
 485
 486 const CHUNKS: &[RIFFParser] = &[
 487     RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"hdrl")), parse: parse_hdrl },
 488     RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"strl")), parse: parse_strl },
 489     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"avih")), parse: parse_avih },
 490     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"ON2h")), parse: parse_avih },
 491     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strf")), parse: parse_strf },
 492     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strh")), parse: parse_strh },
 493     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"indx")), parse: parse_indx },
 494     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"JUNK")), parse: parse_junk },
 495     RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"odml")), parse: parse_odml },
 496 ];
 497
 498 fn is_list_tag(tag: u32) -> bool {
 499     for chunk in CHUNKS.iter() {
 500         if let RIFFTag::List(ltag, _) = chunk.tag {
 501             if tag == ltag {
 502                 return true;
 503             }
 504         }
 505     }
 506     false
 507 }
 508
 509 #[allow(unused_variables)]
 510 fn parse_hdrl(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 511     Ok(0)
 512 }
 513
 514 #[allow(unused_variables)]
 515 fn parse_strl(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 516     Ok(0)
 517 }
 518
 519 fn parse_odml(dmx: &mut AVIDemuxer, _strmgr: &mut StreamManager, _size: usize) -> DemuxerResult<usize> {
 520     dmx.odml = true;
 521     Ok(0)
 522 }
 523
 524 #[allow(unused_variables)]
 525 fn parse_strh(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 526     if size < 0x38 { return Err(InvalidData); }
 527     let tag = dmx.src.read_u32be()?; //stream type
 528     let fcc = dmx.src.read_u32be()?; //handler(fourcc)
 529     dmx.src.read_u32le()?; //flags
 530     dmx.src.read_skip(2)?; //priority
 531     dmx.src.read_skip(2)?; //language
 532     dmx.src.read_skip(4)?; //initial frames
 533     dmx.tb_num = dmx.src.read_u32le()?; //scale
 534     dmx.tb_den = dmx.src.read_u32le()?; //rate
 535     dmx.src.read_skip(4)?; //start
 536     dmx.strm_duration = dmx.src.read_u32le()?;
 537     dmx.src.read_skip(4)?; //buf size
 538     dmx.src.read_skip(4)?; //quality
 539     dmx.src.read_skip(4)?; //sample size
 540     let a = dmx.src.read_u16le()?;
 541     let b = dmx.src.read_u16le()?;
 542     let c = dmx.src.read_u16le()?;
 543     let d = dmx.src.read_u16le()?;
 544
 545     dmx.src.read_skip(size - 0x38)?;
 546
 547     if !dmx.sstate.valid_state() || dmx.sstate.strm_no >= dmx.num_streams {
 548         return Err(InvalidData);
 549     }
 550     if tag == mktag!(b"vids") {
 551         dmx.sstate.strm_type = Some(StreamType::Video);
 552     } else if tag == mktag!(b"auds") {
 553         dmx.sstate.strm_type = Some(StreamType::Audio);
 554     } else {
 555         dmx.sstate.strm_type = Some(StreamType::Data);
 556     }
 557     dmx.sstate.got_strf = false;
 558
 559     Ok(size)
 560 }
 561
 562 fn parse_strf(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 563     if dmx.sstate.strm_type.is_none() { return Err(InvalidData); }
 564     match dmx.sstate.strm_type.unwrap() {
 565         StreamType::Video    => parse_strf_vids(dmx, strmgr, size),
 566         StreamType::Audio    => parse_strf_auds(dmx, strmgr, size),
 567         _                    => parse_strf_xxxx(dmx, strmgr, size),
 568     }
 569 }
 570
 571 #[allow(unused_variables)]
 572 fn parse_strf_vids(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 573     if size < 40 { return Err(InvalidData); }
 574     let bi_size         = dmx.src.read_u32le()?;
 575     if (bi_size as usize) < 40 { return Err(InvalidData); }
 576     let width           = dmx.src.read_u32le()?;
 577     let height          = dmx.src.read_u32le()? as i32;
 578     let planes          = dmx.src.read_u16le()?;
 579     let bitcount        = dmx.src.read_u16le()?;
 580     let mut compression: [u8; 4] = [0; 4];
 581                           dmx.src.read_buf(&mut compression)?;
 582     let img_size        = dmx.src.read_u32le()?;
 583     let xdpi            = dmx.src.read_u32le()?;
 584     let ydpi            = dmx.src.read_u32le()?;
 585     let colors          = dmx.src.read_u32le()?;
 586     validate!(colors <= 256);
 587     let imp_colors      = dmx.src.read_u32le()?;
 588
 589     let flip = height < 0;
 590     let format = if bitcount > 8 { RGB24_FORMAT } else { PAL8_FORMAT };
 591     let mut vhdr = NAVideoInfo::new(width as usize, if flip { -height as usize } else { height as usize}, flip, format);
 592     vhdr.bits = (planes as u8) * (bitcount as u8);
 593     let cname = if find_raw_rgb_fmt(&compression, planes, bitcount, flip, &mut vhdr) {
 594             "rawvideo-ms"
 595         } else if find_raw_yuv_fmt(&compression, &mut vhdr) {
 596             "rawvideo"
 597         } else {
 598             match register::find_codec_from_avi_fourcc(&compression) {
 599                 None => "unknown",
 600                 Some(name) => name,
 601             }
 602         };
 603     let vci = NACodecTypeInfo::Video(vhdr);
 604     let edata = dmx.read_extradata(size - 40)?;
 605     if colors > 0 {
 606         if let Some(ref buf) = edata {
 607             let mut pal = [0u8; 1024];
 608             for (dpal, spal) in pal.chunks_mut(4).take(colors as usize).zip(buf.chunks(4)) {
 609                 dpal[0] = spal[2];
 610                 dpal[1] = spal[1];
 611                 dpal[2] = spal[0];
 612                 dpal[3] = 0;
 613             }
 614             let pal = PalInfo { pal: Arc::new(pal), changed: true, stream_no: strmgr.get_num_streams() };
 615             dmx.pal.push(pal);
 616         }
 617     }
 618     let vinfo = NACodecInfo::new(cname, vci, edata);
 619     let res = strmgr.add_stream(NAStream::new(StreamType::Video, u32::from(dmx.sstate.strm_no), vinfo, dmx.tb_num, dmx.tb_den, u64::from(dmx.strm_duration)));
 620     if res.is_none() { return Err(MemoryError); }
 621     dmx.sstate.reset();
 622     Ok(size)
 623 }
 624
 625 fn find_raw_rgb_fmt(compr: &[u8; 4], planes: u16, bitcount: u16, flip: bool, vhdr: &mut NAVideoInfo) -> bool {
 626     match compr {
 627         &[0, 0, 0, 0] | b"DIB " => {
 628             if planes != 1 {
 629                 return false;
 630             }
 631             let fmt_name = match bitcount {
 632                      8 => "pal8",
 633                     16 => "bgr555",
 634                     24 => "bgr24",
 635                     32 => "bgra24",
 636                     _ => return false,
 637                 };
 638             if let Ok(fmt) = NAPixelFormaton::from_str(fmt_name) {
 639                 vhdr.format = fmt;
 640                 vhdr.flipped = !flip;
 641                 true
 642             } else {
 643                 false
 644             }
 645         },
 646         _ => false,
 647     }
 648 }
 649
 650 fn find_raw_yuv_fmt(compr: &[u8; 4], vhdr: &mut NAVideoInfo) -> bool {
 651     let (fmt_name, swapuv) = match compr {
 652             b"UYVY" | b"UYNY" | b"UYNV" | b"2vuy" => ("uyvy", false),
 653             b"I420" | b"IYUV" => ("yuv420p", false),
 654             b"YV12" => ("yuv420p", true),
 655             b"YVU9" => ("yuv410p", true),
 656             _ => return false,
 657         };
 658     if let Ok(fmt) = NAPixelFormaton::from_str(fmt_name) {
 659         vhdr.format = fmt;
 660         if swapuv {
 661             vhdr.format.comp_info.swap(1, 2);
 662         }
 663         true
 664     } else {
 665         false
 666     }
 667 }
 668
 669 #[allow(unused_variables)]
 670 fn parse_strf_auds(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 671     if size < 16 { return Err(InvalidData); }
 672     let w_format_tag        = dmx.src.read_u16le()?;
 673     let channels            = dmx.src.read_u16le()?;
 674     let samplespersec       = dmx.src.read_u32le()?;
 675     let avgbytespersec      = dmx.src.read_u32le()?;
 676     let block_align         = dmx.src.read_u16le()?;
 677     let bits_per_sample     = dmx.src.read_u16le()?;
 678
 679     let signed = bits_per_sample > 8;
 680     let soniton = NASoniton::new(bits_per_sample as u8, if signed { SONITON_FLAG_SIGNED } else { 0 });
 681     let ahdr = NAAudioInfo::new(samplespersec, channels as u8, soniton, block_align as usize);
 682     let edata = if size > 16 {
 683             let edata_size  = dmx.src.read_u16le()? as usize;
 684             validate!(edata_size + 18 <= size);
 685             dmx.read_extradata(size - 18)?
 686         } else {
 687             None
 688         };
 689     let cname = match register::find_codec_from_wav_twocc(w_format_tag) {
 690                     None => "unknown",
 691                     Some(name) => name,
 692                 };
 693     let ainfo = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata);
 694     let res = strmgr.add_stream(NAStream::new(StreamType::Audio, u32::from(dmx.sstate.strm_no), ainfo, dmx.tb_num, dmx.tb_den, u64::from(dmx.strm_duration)));
 695     if res.is_none() { return Err(MemoryError); }
 696     dmx.sstate.reset();
 697     Ok(size)
 698 }
 699
 700 fn parse_strf_xxxx(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 701     let edata = dmx.read_extradata(size)?;
 702     let info = NACodecInfo::new("unknown", NACodecTypeInfo::None, edata);
 703     let res = strmgr.add_stream(NAStream::new(StreamType::Data, u32::from(dmx.sstate.strm_no), info, dmx.tb_num, dmx.tb_den, u64::from(dmx.strm_duration)));
 704     if res.is_none() { return Err(MemoryError); }
 705     dmx.sstate.reset();
 706     Ok(size)
 707 }
 708
 709 #[allow(unused_variables)]
 710 fn parse_avih(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 711     if size < 0x38 { return Err(InvalidData); }
 712     let timebase = dmx.src.read_u32le()?; //microsec per frame
 713     dmx.src.read_skip(4)?; //max frame size
 714     dmx.src.read_skip(4)?; //padding
 715     dmx.src.read_u32le()?; //flags
 716     let frames = dmx.src.read_u32le()?; //frames
 717     dmx.src.read_skip(4)?; //initial frames
 718     let streams = dmx.src.read_u32le()?; //streams
 719     if streams > 100 { return Err(InvalidData); }
 720     dmx.num_streams = streams as u8;
 721
 722     dmx.src.read_skip(4)?; //buf size
 723     let width = dmx.src.read_u32le()?; //width
 724     let height = dmx.src.read_u32le()? as i32; //height
 725     dmx.src.read_skip(16)?; //reserved
 726
 727     dmx.cur_frame.resize(streams as usize, 0);
 728     dmx.src.read_skip(size - 0x38)?;
 729     Ok(size)
 730 }
 731
 732 fn parse_indx(dmx: &mut AVIDemuxer, _strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 733     dmx.odml = true;
 734     validate!(size >= 24);
 735     let entry_size = dmx.src.read_u16le()? as usize;
 736     if entry_size != 4 {
 737         dmx.src.read_skip(size - 2)?;
 738         return Ok(size);
 739     }
 740     let sub_type = dmx.src.read_byte()?;
 741     let idx_type = dmx.src.read_byte()?;
 742     validate!(sub_type == 0 && idx_type == 0);
 743     let entries = dmx.src.read_u32le()? as usize;
 744     validate!(size >= 24 + entries * 4 * entry_size);
 745     dmx.src.read_tag()?; //chunk id
 746     dmx.src.read_skip(12)?; // reserved
 747     for _ in 0..entries {
 748         let offset = dmx.src.read_u64le()?;
 749         let _idx_len = dmx.src.read_u32le()?;
 750         let _nframes = dmx.src.read_u32le()?;
 751         dmx.odml_idx.push(offset);
 752     }
 753     dmx.src.read_skip(size - 24 - entries * 4 * entry_size)?;
 754     Ok(size)
 755 }
 756
 757 #[allow(unused_variables)]
 758 fn parse_junk(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 759     dmx.src.read_skip(size)?;
 760     Ok(size)
 761 }
 762
 763 #[allow(clippy::verbose_bit_mask)]
 764 fn parse_idx1(src: &mut ByteReader, strmgr: &mut StreamManager, seek_idx: &mut SeekIndex, size: usize, movi_pos: u64, key_offs: &mut Vec<u64>) -> DemuxerResult<usize> {
 765     validate!((size & 15) == 0);
 766     let mut tag = [0u8; 4];
 767     let num_entries = size >> 4;
 768     let mut counter = [0u64; 100];
 769     let mut add_offset = 0;
 770     let mut set_offset = false;
 771     for _ in 0..num_entries {
 772                               src.read_buf(&mut tag)?;
 773         let flags           = src.read_u32le()?;
 774         let mut offset      = src.read_u32le()? as u64;
 775         let _length         = src.read_u32le()?;
 776
 777         if !set_offset && offset < movi_pos {
 778             add_offset = movi_pos - offset;
 779         }
 780         set_offset = true;
 781
 782         offset += add_offset;
 783
 784         if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' {
 785             continue;
 786         }
 787         let stream_no = ((tag[0] - b'0') * 10 + (tag[1] - b'0')) as usize;
 788
 789         if (flags & 0x10) != 0 {
 790             if let Some(str) = strmgr.get_stream(stream_no) {
 791                 if str.get_media_type() == StreamType::Video {
 792                     let (tb_num, tb_den) = str.get_timebase();
 793                     let pts = counter[stream_no];
 794                     let time = NATimeInfo::ts_to_time(pts, 1000, tb_num, tb_den);
 795                     validate!(offset >= movi_pos);
 796                     seek_idx.add_entry(stream_no as u32, SeekEntry { time, pts, pos: offset });
 797                 }
 798                 key_offs.push(offset);
 799             }
 800         }
 801         counter[stream_no] += 1;
 802     }
 803     key_offs.sort_unstable();
 804     Ok(size)
 805 }
 806
 807 fn parse_odml_ix(src: &mut ByteReader, strmgr: &mut StreamManager, seek_idx: &mut SeekIndex, stream_no: usize, size: usize, start: u64) -> DemuxerResult<u64> {
 808     validate!(size >= 24);
 809     let entry_size = src.read_u16le()? as usize;
 810     if entry_size != 2 {
 811         return Err(DemuxerError::NotImplemented);
 812     }
 813     let sub_type = src.read_byte()?;
 814     let idx_type = src.read_byte()?;
 815     validate!(sub_type == 0 && idx_type == 1);
 816     let entries = src.read_u32le()? as usize;
 817     validate!(size == 24 + entries * 4 * entry_size);
 818     src.read_tag()?; //chunk id
 819     let base_offset = src.read_u64le()?;
 820     src.read_u32le()?; //reserved
 821     if let Some(stream) = strmgr.get_stream(stream_no) {
 822         if stream.get_media_type() == StreamType::Video {
 823             let (tb_num, tb_den) = stream.get_timebase();
 824
 825             for i in 0..entries {
 826                 let offset = src.read_u32le()?;
 827                 validate!(offset >= 8);
 828                 let _size  = src.read_u32le()?;
 829
 830                 let pts = start + (i as u64);
 831                 let time = NATimeInfo::ts_to_time(pts, 1000, tb_num, tb_den);
 832                 seek_idx.add_entry(stream_no as u32, SeekEntry { time, pts, pos: base_offset + u64::from(offset - 8) });
 833             }
 834
 835             Ok(start + (entries as u64))
 836         } else {
 837             Ok(0)
 838         }
 839     } else {
 840         Ok(0)
 841     }
 842 }
 843
 844 pub struct AVIDemuxerCreator { }
 845
 846 impl DemuxerCreator for AVIDemuxerCreator {
 847     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 848         Box::new(AVIDemuxer::new(br))
 849     }
 850     fn get_name(&self) -> &'static str { "avi" }
 851 }
 852
 853 #[cfg(test)]
 854 mod test {
 855     use super::*;
 856     use std::fs::File;
 857
 858     #[test]
 859     fn test_avi_demux() {
 860         //test sample: https://samples.mplayerhq.hu/V-codecs/RT21/320x240/laser05.avi
 861         let mut file = File::open("assets/Indeo/laser05.avi").unwrap();
 862         let mut fr = FileReader::new_read(&mut file);
 863         let mut br = ByteReader::new(&mut fr);
 864         let mut dmx = AVIDemuxer::new(&mut br);
 865         let mut sm = StreamManager::new();
 866         let mut si = SeekIndex::new();
 867         dmx.open(&mut sm, &mut si).unwrap();
 868
 869         loop {
 870             let pktres = dmx.get_frame(&mut sm);
 871             if let Err(e) = pktres {
 872                 if e == DemuxerError::EOF { break; }
 873                 panic!("error");
 874             }
 875             let pkt = pktres.unwrap();
 876             println!("Got {}", pkt);
 877         }
 878     }
 879 }