src/demuxers/avi.rs

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