demuxers/avi.rs

   1 use nihav_core::demuxers::*;
   2 use nihav_registry::register;
   3 use nihav_core::demuxers::DemuxerError::*;
   4
   5 macro_rules! mktag {
   6     ($a:expr, $b:expr, $c:expr, $d:expr) => ({
   7         (($a as u32) << 24) | (($b as u32) << 16) | (($c as u32) << 8) | ($d as u32)
   8     });
   9     ($arr:expr) => ({
  10         (($arr[0] as u32) << 24) | (($arr[1] as u32) << 16) | (($arr[2] as u32) << 8) | ($arr[3] as u32)
  11     });
  12 }
  13
  14 struct StreamState {
  15     strm_no:    u8,
  16     got_strf:   bool,
  17     strm_type:  Option<StreamType>,
  18 }
  19
  20 impl StreamState {
  21     fn new() -> Self {
  22         StreamState { strm_no: 0, got_strf: true, strm_type: None }
  23     }
  24     fn reset(&mut self) {
  25         self.strm_type = None;
  26         self.got_strf  = true;
  27         self.strm_no  += 1;
  28     }
  29     fn valid_state(&self) -> bool {
  30         match self.strm_type {
  31             None => self.got_strf,
  32             _    => false,
  33         }
  34     }
  35 }
  36
  37 #[allow(dead_code)]
  38 struct AVIDemuxer<'a> {
  39     src:            &'a mut ByteReader<'a>,
  40     cur_frame:      Vec<u64>,
  41     num_streams:    u8,
  42     size:           usize,
  43     movi_size:      usize,
  44     movi_pos:       u64,
  45     movi_orig:      usize,
  46     sstate:         StreamState,
  47     tb_num:         u32,
  48     tb_den:         u32,
  49 }
  50
  51 #[derive(Debug,Clone,Copy,PartialEq)]
  52 enum RIFFTag {
  53     Chunk(u32),
  54     List(u32,u32),
  55 }
  56
  57 struct RIFFParser {
  58     tag:   RIFFTag,
  59     parse: fn(&mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize>,
  60 }
  61
  62 impl<'a> DemuxCore<'a> for AVIDemuxer<'a> {
  63     fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> {
  64         self.read_header(strmgr, seek_index)?;
  65         Ok(())
  66     }
  67
  68     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
  69         if self.movi_size == 0 { return Err(EOF); }
  70         let mut tag: [u8; 4] = [0; 4];
  71         loop {
  72             if (self.src.tell() & 1) == 1 {
  73                 self.src.read_skip(1)?;
  74                 self.movi_size -= 1;
  75                 if self.movi_size == 0 { return Err(EOF); }
  76             }
  77             self.src.read_buf(&mut tag)?;
  78             let size = self.src.read_u32le()? as usize;
  79             if mktag!(tag) == mktag!(b"JUNK") {
  80                 self.movi_size -= size + 8;
  81                 self.src.read_skip(size)?;
  82                 if self.movi_size == 0 { return Err(EOF); }
  83                 continue;
  84             }
  85             if mktag!(tag) == mktag!(b"LIST") {
  86                 self.movi_size -= 12;
  87                 self.src.read_skip(4)?;
  88                 if self.movi_size == 0 { return Err(EOF); }
  89                 continue;
  90             }
  91             if tag[0] == b'i' && tag[1] == b'x' {
  92                 return Err(EOF);
  93             }
  94             if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' {
  95                 return Err(InvalidData);
  96             }
  97             let stream_no = (tag[0] - b'0') * 10 + (tag[1] - b'0');
  98             let str = strmgr.get_stream(stream_no as usize);
  99             if str.is_none() { return Err(InvalidData); }
 100             let stream = str.unwrap();
 101             if size == 0 {
 102                 self.movi_size -= 8;
 103                 if self.movi_size == 0 { return Err(EOF); }
 104                 continue;
 105             }
 106             let (tb_num, tb_den) = stream.get_timebase();
 107             let ts = NATimeInfo::new(Some(self.cur_frame[stream_no as usize]), None, None, tb_num, tb_den);
 108             let pkt = self.src.read_packet(stream, ts, false, size)?;
 109             self.cur_frame[stream_no as usize] += 1;
 110             self.movi_size -= size + 8;
 111
 112             return Ok(pkt);
 113         }
 114     }
 115
 116     fn seek(&mut self, time: u64, seek_index: &SeekIndex) -> DemuxerResult<()> {
 117         let ret = seek_index.find_pos(time);
 118         if ret.is_none() {
 119             return Err(DemuxerError::SeekError);
 120         }
 121         let seek_info = ret.unwrap();
 122
 123         if seek_info.pos < self.movi_pos { return Err(DemuxerError::SeekError); }
 124         let skip_size = (seek_info.pos - self.movi_pos) as usize;
 125         if skip_size > self.movi_size { return Err(DemuxerError::SeekError); }
 126         self.movi_size = self.movi_orig - skip_size;
 127
 128         self.cur_frame[seek_info.str_id as usize] = seek_info.pts;
 129         self.src.seek(SeekFrom::Start(seek_info.pos))?;
 130
 131         Ok(())
 132     }
 133 }
 134
 135 impl<'a> AVIDemuxer<'a> {
 136     fn new(io: &'a mut ByteReader<'a>) -> Self {
 137         AVIDemuxer {
 138             cur_frame: Vec::new(),
 139             num_streams: 0,
 140             src: io,
 141             size: 0,
 142             movi_size: 0,
 143             movi_pos:  0,
 144             movi_orig: 0,
 145             sstate: StreamState::new(),
 146             tb_num: 0,
 147             tb_den: 0,
 148         }
 149     }
 150
 151     fn parse_chunk(&mut self, strmgr: &mut StreamManager, end_tag: RIFFTag, csize: usize, depth: u16) -> DemuxerResult<(usize, bool)> {
 152         if csize < 8 { return Err(InvalidData); }
 153         if depth > 42 { return Err(InvalidData); }
 154
 155         let tag  = self.src.read_u32be()?;
 156         let size = self.src.read_u32le()? as usize;
 157         if size > csize { return Err(InvalidData); }
 158         if RIFFTag::Chunk(tag) == end_tag {
 159             return Ok((size, true));
 160         }
 161         let is_list = is_list_tag(tag);
 162         let ltag = if is_list { self.src.read_u32be()? } else { 0 };
 163         if RIFFTag::List(tag, ltag) == end_tag {
 164             return Ok((size, true));
 165         }
 166
 167         for chunk in CHUNKS.iter() {
 168             if RIFFTag::Chunk(tag) == chunk.tag {
 169                 let psize = (chunk.parse)(self, strmgr, size)?;
 170                 if psize != size { return Err(InvalidData); }
 171                 if (psize & 1) == 1 { self.src.read_skip(1)?; }
 172                 return Ok((size + 8, false));
 173             }
 174             if RIFFTag::List(tag, ltag) == chunk.tag {
 175                 let mut rest_size = size - 4;
 176                 let psize = (chunk.parse)(self, strmgr, rest_size)?;
 177                 if psize > rest_size { return Err(InvalidData); }
 178                 rest_size -= psize;
 179                 while rest_size > 0 {
 180                     let (psize, _) = self.parse_chunk(strmgr, end_tag, rest_size, depth+1)?;
 181                     if psize > rest_size { return Err(InvalidData); }
 182                     rest_size -= psize;
 183                     if ((psize & 1) == 1) && (rest_size > 0) {
 184                         rest_size -= 1;
 185                     }
 186                 }
 187
 188                 return Ok((size + 8, false));
 189             }
 190         }
 191         if !is_list {
 192             self.src.read_skip(size)?;
 193         } else {
 194             if size < 4 { return Err(InvalidData); }
 195             self.src.read_skip(size - 4)?;
 196         }
 197         if (size & 1) == 1 { self.src.read_skip(1)?; }
 198         Ok((size + 8, false))
 199     }
 200
 201     fn read_header(&mut self, strmgr: &mut StreamManager, seek_idx: &mut SeekIndex) -> DemuxerResult<()> {
 202         let riff_tag = self.src.read_u32be()?;
 203         let size     = self.src.read_u32le()? as usize;
 204         let avi_tag  = self.src.read_u32be()?;
 205         let mut matches = false;
 206         for rt in RIFF_TAGS.iter() {
 207             if rt[0] == riff_tag && rt[1] == avi_tag {
 208                 matches = true;
 209                 break;
 210             }
 211         }
 212         if !matches {
 213             return Err(InvalidData);
 214         }
 215         self.size = size;
 216         let mut rest_size = size;
 217         loop {
 218             let (csz, end) = self.parse_chunk(strmgr, RIFFTag::List(mktag!(b"LIST"), mktag!(b"movi")), rest_size,0)?;
 219             if end {
 220                 self.movi_size = csz - 4;
 221                 self.movi_orig = self.movi_size;
 222                 self.movi_pos = self.src.tell();
 223                 break;
 224             }
 225             rest_size -= csz;
 226         }
 227         if !seek_idx.skip_index {
 228             self.src.read_skip(self.movi_size)?;
 229             while rest_size > 0 {
 230                 let ret = self.parse_chunk(strmgr, RIFFTag::Chunk(mktag!(b"idx1")), rest_size,0);
 231                 if ret.is_err() { break; }
 232                 let (csz, end) = ret.unwrap();
 233                 if end {
 234                     let _res = parse_idx1(&mut self.src, strmgr, seek_idx, csz, self.movi_pos);
 235                     break;
 236                 }
 237                 rest_size -= csz;
 238             }
 239         }
 240         if self.movi_pos != 0 {
 241             self.src.seek(SeekFrom::Start(self.movi_pos))?;
 242         } else {
 243             return Err(InvalidData);
 244         }
 245         if !self.sstate.valid_state() || self.sstate.strm_no != self.num_streams {
 246             return Err(InvalidData);
 247         }
 248         Ok(())
 249     }
 250
 251     fn read_extradata(&mut self, size: usize) -> DemuxerResult<Option<Vec<u8>>> {
 252         if size == 0 { return Ok(None); }
 253         let mut edvec: Vec<u8> = vec![0; size];
 254         self.src.read_buf(&mut edvec)?;
 255         Ok(Some(edvec))
 256     }
 257 }
 258
 259 const RIFF_TAGS: &[[u32; 2]] = &[
 260     [ mktag!(b"RIFF"), mktag!(b"AVI ") ],
 261     [ mktag!(b"RIFF"), mktag!(b"AVIX") ],
 262     [ mktag!(b"ON2 "), mktag!(b"ON2f") ],
 263 ];
 264
 265 const CHUNKS: [RIFFParser; 7] = [
 266     RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"hdrl")), parse: parse_hdrl },
 267     RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"strl")), parse: parse_strl },
 268     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"avih")), parse: parse_avih },
 269     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"ON2h")), parse: parse_avih },
 270     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strf")), parse: parse_strf },
 271     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strh")), parse: parse_strh },
 272     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"JUNK")), parse: parse_junk },
 273 ];
 274
 275 fn is_list_tag(tag: u32) -> bool {
 276     for chunk in CHUNKS.iter() {
 277         if let RIFFTag::List(ltag, _) = chunk.tag {
 278             if tag == ltag {
 279                 return true;
 280             }
 281         }
 282     }
 283     false
 284 }
 285
 286 #[allow(unused_variables)]
 287 fn parse_hdrl(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 288     Ok(0)
 289 }
 290
 291 #[allow(unused_variables)]
 292 fn parse_strl(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 293     Ok(0)
 294 }
 295
 296 #[allow(unused_variables)]
 297 fn parse_strh(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 298     if size < 0x38 { return Err(InvalidData); }
 299     let tag = dmx.src.read_u32be()?; //stream type
 300     let fcc = dmx.src.read_u32be()?; //handler(fourcc)
 301     dmx.src.read_u32le()?; //flags
 302     dmx.src.read_skip(2)?; //priority
 303     dmx.src.read_skip(2)?; //language
 304     dmx.src.read_skip(4)?; //initial frames
 305     dmx.tb_num = dmx.src.read_u32le()?; //scale
 306     dmx.tb_den = dmx.src.read_u32le()?; //rate
 307     dmx.src.read_skip(4)?; //start
 308     dmx.src.read_skip(4)?; //length
 309     dmx.src.read_skip(4)?; //buf size
 310     dmx.src.read_skip(4)?; //quality
 311     dmx.src.read_skip(4)?; //sample size
 312     let a = dmx.src.read_u16le()?;
 313     let b = dmx.src.read_u16le()?;
 314     let c = dmx.src.read_u16le()?;
 315     let d = dmx.src.read_u16le()?;
 316
 317     dmx.src.read_skip(size - 0x38)?;
 318
 319     if !dmx.sstate.valid_state() || dmx.sstate.strm_no >= dmx.num_streams {
 320         return Err(InvalidData);
 321     }
 322     if tag == mktag!(b"vids") {
 323         dmx.sstate.strm_type = Some(StreamType::Video);
 324     } else if tag == mktag!(b"auds") {
 325         dmx.sstate.strm_type = Some(StreamType::Audio);
 326     } else {
 327         dmx.sstate.strm_type = Some(StreamType::Data);
 328     }
 329     dmx.sstate.got_strf = false;
 330
 331     Ok(size)
 332 }
 333
 334 fn parse_strf(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 335     if dmx.sstate.strm_type.is_none() { return Err(InvalidData); }
 336     match dmx.sstate.strm_type.unwrap() {
 337         StreamType::Video    => parse_strf_vids(dmx, strmgr, size),
 338         StreamType::Audio    => parse_strf_auds(dmx, strmgr, size),
 339         _                    => parse_strf_xxxx(dmx, strmgr, size),
 340     }
 341 }
 342
 343 #[allow(unused_variables)]
 344 fn parse_strf_vids(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 345     if size < 40 { return Err(InvalidData); }
 346     let bi_size         = dmx.src.read_u32le()?;
 347     if (bi_size as usize) > size { return Err(InvalidData); }
 348     let width           = dmx.src.read_u32le()?;
 349     let height          = dmx.src.read_u32le()? as i32;
 350     let planes          = dmx.src.read_u16le()?;
 351     let bitcount        = dmx.src.read_u16le()?;
 352     let mut compression: [u8; 4] = [0; 4];
 353                           dmx.src.read_buf(&mut compression)?;
 354     let img_size        = dmx.src.read_u32le()?;
 355     let xdpi            = dmx.src.read_u32le()?;
 356     let ydpi            = dmx.src.read_u32le()?;
 357     let colors          = dmx.src.read_u32le()?;
 358     let imp_colors      = dmx.src.read_u32le()?;
 359
 360     let flip = height < 0;
 361     let format = if bitcount > 8 { RGB24_FORMAT } else { PAL8_FORMAT };
 362     let vhdr = NAVideoInfo::new(width as usize, if flip { -height as usize } else { height as usize}, flip, PAL8_FORMAT);
 363     let vci = NACodecTypeInfo::Video(vhdr);
 364     let edata = dmx.read_extradata(size - 40)?;
 365     let cname = match register::find_codec_from_avi_fourcc(&compression) {
 366                     None => "unknown",
 367                     Some(name) => name,
 368                 };
 369     let vinfo = NACodecInfo::new(cname, vci, edata);
 370     let res = strmgr.add_stream(NAStream::new(StreamType::Video, u32::from(dmx.sstate.strm_no), vinfo, dmx.tb_num, dmx.tb_den));
 371     if res.is_none() { return Err(MemoryError); }
 372     dmx.sstate.reset();
 373     Ok(size)
 374 }
 375
 376 #[allow(unused_variables)]
 377 fn parse_strf_auds(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 378     if size < 16 { return Err(InvalidData); }
 379     let w_format_tag        = dmx.src.read_u16le()?;
 380     let channels            = dmx.src.read_u16le()?;
 381     let samplespersec       = dmx.src.read_u32le()?;
 382     let avgbytespersec      = dmx.src.read_u32le()?;
 383     let block_align         = dmx.src.read_u16le()?;
 384     let bits_per_sample     = dmx.src.read_u16le()?;
 385
 386     let soniton = NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED);
 387     let ahdr = NAAudioInfo::new(samplespersec, channels as u8, soniton, block_align as usize);
 388     let edata = dmx.read_extradata(size - 16)?;
 389     let cname = match register::find_codec_from_wav_twocc(w_format_tag) {
 390                     None => "unknown",
 391                     Some(name) => name,
 392                 };
 393     let ainfo = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata);
 394     let res = strmgr.add_stream(NAStream::new(StreamType::Audio, u32::from(dmx.sstate.strm_no), ainfo, dmx.tb_num, dmx.tb_den));
 395     if res.is_none() { return Err(MemoryError); }
 396     dmx.sstate.reset();
 397     Ok(size)
 398 }
 399
 400 fn parse_strf_xxxx(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 401     let edata = dmx.read_extradata(size)?;
 402     let info = NACodecInfo::new("unknown", NACodecTypeInfo::None, edata);
 403     let res = strmgr.add_stream(NAStream::new(StreamType::Data, u32::from(dmx.sstate.strm_no), info, dmx.tb_num, dmx.tb_den));
 404     if res.is_none() { return Err(MemoryError); }
 405     dmx.sstate.reset();
 406     Ok(size)
 407 }
 408
 409 #[allow(unused_variables)]
 410 fn parse_avih(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 411     if size < 0x38 { return Err(InvalidData); }
 412     let timebase = dmx.src.read_u32le()?; //microsec per frame
 413     dmx.src.read_skip(4)?; //max frame size
 414     dmx.src.read_skip(4)?; //padding
 415     dmx.src.read_u32le()?; //flags
 416     let frames = dmx.src.read_u32le()?; //frames
 417     dmx.src.read_skip(4)?; //initial frames
 418     let streams = dmx.src.read_u32le()?; //streams
 419     if streams > 100 { return Err(InvalidData); }
 420     dmx.num_streams = streams as u8;
 421
 422     dmx.src.read_skip(4)?; //buf size
 423     let width = dmx.src.read_u32le()?; //width
 424     let height = dmx.src.read_u32le()? as i32; //height
 425     dmx.src.read_skip(16)?; //reserved
 426
 427     dmx.cur_frame.resize(streams as usize, 0);
 428     dmx.src.read_skip(size - 0x38)?;
 429     Ok(size)
 430 }
 431
 432 #[allow(unused_variables)]
 433 fn parse_junk(dmx: &mut AVIDemuxer, strmgr: &mut StreamManager, size: usize) -> DemuxerResult<usize> {
 434     dmx.src.read_skip(size)?;
 435     Ok(size)
 436 }
 437
 438 fn parse_idx1(src: &mut ByteReader, strmgr: &mut StreamManager, seek_idx: &mut SeekIndex, size: usize, movi_pos: u64) -> DemuxerResult<usize> {
 439     validate!((size & 15) == 0);
 440     let mut tag = [0u8; 4];
 441     let num_entries = size >> 4;
 442     let mut counter = [0u64; 100];
 443     for _ in 0..num_entries {
 444                               src.read_buf(&mut tag)?;
 445         let flags           = src.read_u32le()?;
 446         let offset          = src.read_u32le()? as u64;
 447         let _length         = src.read_u32le()?;
 448
 449         if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' {
 450             return Err(InvalidData);
 451         }
 452         let stream_no = ((tag[0] - b'0') * 10 + (tag[1] - b'0')) as usize;
 453
 454         if (flags & 0x10) != 0 {
 455             if let Some(str) = strmgr.get_stream(stream_no) {
 456                 if str.get_media_type() == StreamType::Video {
 457                     let (tb_num, tb_den) = str.get_timebase();
 458                     let pts = counter[stream_no];
 459                     let time = NATimeInfo::ts_to_time(pts, 1000, tb_num, tb_den);
 460                     seek_idx.add_entry(stream_no as u32, SeekEntry { time, pts, pos: offset + movi_pos - 4 });
 461                 }
 462             }
 463         }
 464         counter[stream_no] += 1;
 465     }
 466     Ok(size)
 467 }
 468
 469 pub struct AVIDemuxerCreator { }
 470
 471 impl DemuxerCreator for AVIDemuxerCreator {
 472     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 473         Box::new(AVIDemuxer::new(br))
 474     }
 475     fn get_name(&self) -> &'static str { "avi" }
 476 }
 477
 478 #[cfg(test)]
 479 mod test {
 480     use super::*;
 481     use std::fs::File;
 482
 483     #[test]
 484     fn test_avi_demux() {
 485         let mut file = File::open("assets/Indeo/laser05.avi").unwrap();
 486         let mut fr = FileReader::new_read(&mut file);
 487         let mut br = ByteReader::new(&mut fr);
 488         let mut dmx = AVIDemuxer::new(&mut br);
 489         let mut sm = StreamManager::new();
 490         let mut si = SeekIndex::new();
 491         dmx.open(&mut sm, &mut si).unwrap();
 492
 493         loop {
 494             let pktres = dmx.get_frame(&mut sm);
 495             if let Err(e) = pktres {
 496                 if e == DemuxerError::EOF { break; }
 497                 panic!("error");
 498             }
 499             let pkt = pktres.unwrap();
 500             println!("Got {}", pkt);
 501         }
 502     }
 503 }