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     dmx:            Demuxer,
  47     size:           usize,
  48     movi_size:      usize,
  49     sstate:         StreamState,
  50     tb_num:         u32,
  51     tb_den:         u32,
  52 }
  53
  54 #[derive(Debug,Clone,Copy,PartialEq)]
  55 enum RIFFTag {
  56     Chunk(u32),
  57     List(u32,u32),
  58 }
  59
  60 struct RIFFParser {
  61     tag:   RIFFTag,
  62     parse: fn(&mut AVIDemuxer, size: usize) -> DemuxerResult<usize>,
  63 }
  64
  65 impl<'a> Demux<'a> for AVIDemuxer<'a> {
  66     #[allow(unused_variables)]
  67     fn open(&mut self) -> DemuxerResult<()> {
  68         self.read_header()?;
  69         self.opened = true;
  70         Ok(())
  71     }
  72
  73     fn get_num_streams(&self) -> usize { self.dmx.get_num_streams() }
  74     fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> { self.dmx.get_stream(idx) }
  75
  76     fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
  77         if !self.opened { return Err(NoSuchInput); }
  78         if self.movi_size == 0 { return Err(EOF); }
  79         let mut tag: [u8; 4] = [0; 4];
  80         loop {
  81             if (self.src.tell() & 1) == 1 {
  82                 self.src.read_skip(1)?;
  83                 self.movi_size -= 1;
  84                 if self.movi_size == 0 { return Err(EOF); }
  85             }
  86             self.src.read_buf(&mut tag)?;
  87             let size = self.src.read_u32le()? as usize;
  88             if mktag!(tag) == mktag!(b"JUNK") {
  89                 self.movi_size -= size + 8;
  90                 self.src.read_skip(size)?;
  91                 if self.movi_size == 0 { return Err(EOF); }
  92                 continue;
  93             }
  94             if mktag!(tag) == mktag!(b"LIST") {
  95                 self.movi_size -= 12;
  96                 self.src.read_skip(4)?;
  97                 if self.movi_size == 0 { return Err(EOF); }
  98                 continue;
  99             }
 100             if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' {
 101                 return Err(InvalidData);
 102             }
 103             let stream_no = (tag[0] - b'0') * 10 + (tag[1] - b'0');
 104             let str = self.dmx.get_stream(stream_no as usize);
 105             if let None = str { return Err(InvalidData); }
 106             let stream = str.unwrap();
 107             if size == 0 {
 108                 self.movi_size -= 8;
 109                 if self.movi_size == 0 { return Err(EOF); }
 110                 continue;
 111             }
 112             let (tb_num, tb_den) = stream.get_timebase();
 113             let ts = NATimeInfo::new(Some(self.cur_frame[stream_no as usize]), None, None, tb_num, tb_den);
 114             let pkt = self.src.read_packet(stream, ts, false, size)?;
 115             self.cur_frame[stream_no as usize] += 1;
 116             self.movi_size -= size + 8;
 117
 118             return Ok(pkt);
 119         }
 120     }
 121
 122     #[allow(unused_variables)]
 123     fn seek(&mut self, time: u64) -> DemuxerResult<()> {
 124         if !self.opened { return Err(NoSuchInput); }
 125         Err(NotImplemented)
 126     }
 127 }
 128
 129 impl<'a> AVIDemuxer<'a> {
 130     fn new(io: &'a mut ByteReader<'a>) -> Self {
 131         AVIDemuxer {
 132             cur_frame: Vec::new(),
 133             num_streams: 0,
 134             opened: false,
 135             src: io,
 136             size: 0,
 137             movi_size: 0,
 138             sstate: StreamState::new(),
 139             tb_num: 0,
 140             tb_den: 0,
 141             dmx: Demuxer::new()
 142         }
 143     }
 144
 145     fn parse_chunk(&mut self, end_tag: RIFFTag, csize: usize, depth: u16) -> DemuxerResult<(usize, bool)> {
 146         if csize < 8 { return Err(InvalidData); }
 147         if depth > 42 { return Err(InvalidData); }
 148
 149         let tag  = self.src.read_u32be()?;
 150         let size = self.src.read_u32le()? as usize;
 151         if size > csize { return Err(InvalidData); }
 152         if RIFFTag::Chunk(tag) == end_tag {
 153             return Ok((size, true));
 154         }
 155         let is_list = is_list_tag(tag);
 156         let ltag = if is_list { self.src.read_u32be()? } else { 0 };
 157         if RIFFTag::List(tag, ltag) == end_tag {
 158             return Ok((size, true));
 159         }
 160
 161         for i in 0..CHUNKS.len() {
 162             if RIFFTag::Chunk(tag) == CHUNKS[i].tag {
 163                 let psize = (CHUNKS[i].parse)(self, size)?;
 164                 if psize != size { return Err(InvalidData); }
 165                 if (psize & 1) == 1 { self.src.read_skip(1)?; }
 166                 return Ok((size + 8, false));
 167             }
 168             if RIFFTag::List(tag, ltag) == CHUNKS[i].tag {
 169                 let mut rest_size = size - 4;
 170                 let psize = (CHUNKS[i].parse)(self, rest_size)?;
 171                 if psize > rest_size { return Err(InvalidData); }
 172                 rest_size -= psize;
 173                 while rest_size > 0 {
 174                     let (psize, _) = self.parse_chunk(end_tag, rest_size, depth+1)?;
 175                     if psize > rest_size { return Err(InvalidData); }
 176                     rest_size -= psize;
 177                     if (psize & 1) == 1 {
 178                         if rest_size > 0 {
 179                             rest_size -= 1;
 180                         }
 181                     }
 182                 }
 183
 184                 return Ok((size + 8, false));
 185             }
 186         }
 187         if !is_list {
 188             self.src.read_skip(size)?;
 189         } else {
 190             if size < 4 { return Err(InvalidData); }
 191             self.src.read_skip(size - 4)?;
 192         }
 193         if (size & 1) == 1 { self.src.read_skip(1)?; }
 194         return Ok((size + 8, false));
 195     }
 196
 197     fn read_header(&mut self) -> DemuxerResult<()> {
 198         let riff_tag = self.src.read_u32be()?;
 199         let size     = self.src.read_u32le()? as usize;
 200         let avi_tag  = self.src.read_u32be()?;
 201         if riff_tag != mktag!(b"RIFF") || avi_tag != mktag!(b"AVI ") {
 202             return Err(InvalidData);
 203         }
 204         self.size = size;
 205         let mut rest_size = size;
 206         loop {
 207             let (csz, end) = self.parse_chunk(RIFFTag::List(mktag!(b"LIST"), mktag!(b"movi")), rest_size,0)?;
 208             if end { self.movi_size = csz - 4; break; }
 209             rest_size -= csz;
 210         }
 211         if !self.sstate.valid_state() || self.sstate.strm_no != self.num_streams {
 212             return Err(InvalidData);
 213         }
 214         Ok(())
 215     }
 216
 217     fn read_extradata(&mut self, size: usize) -> DemuxerResult<Option<Vec<u8>>> {
 218         if size == 0 { return Ok(None); }
 219         let mut edvec: Vec<u8> = Vec::with_capacity(size);
 220         edvec.resize(size, 0);
 221         self.src.read_buf(&mut edvec)?;
 222         Ok(Some(edvec))
 223     }
 224 }
 225
 226 const CHUNKS: [RIFFParser; 6] = [
 227     RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"hdrl")), parse: parse_hdrl },
 228     RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"strl")), parse: parse_strl },
 229     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"avih")), parse: parse_avih },
 230     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strf")), parse: parse_strf },
 231     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strh")), parse: parse_strh },
 232     RIFFParser { tag: RIFFTag::Chunk(mktag!(b"JUNK")), parse: parse_junk },
 233 ];
 234
 235 fn is_list_tag(tag: u32) -> bool {
 236     for i in 0..CHUNKS.len() {
 237         if let RIFFTag::List(ltag, _) = CHUNKS[i].tag {
 238             if tag == ltag {
 239                 return true;
 240             }
 241         }
 242     }
 243     false
 244 }
 245
 246 #[allow(unused_variables)]
 247 fn parse_hdrl(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 248     Ok(0)
 249 }
 250
 251 #[allow(unused_variables)]
 252 fn parse_strl(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 253     Ok(0)
 254 }
 255
 256 #[allow(unused_variables)]
 257 fn parse_strh(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 258     if size < 0x38 { return Err(InvalidData); }
 259     let tag = dmx.src.read_u32be()?; //stream type
 260     let fcc = dmx.src.read_u32be()?; //handler(fourcc)
 261     dmx.src.read_u32le()?; //flags
 262     dmx.src.read_skip(2)?; //priority
 263     dmx.src.read_skip(2)?; //language
 264     dmx.src.read_skip(4)?; //initial frames
 265     dmx.tb_num = dmx.src.read_u32le()?; //scale
 266     dmx.tb_den = dmx.src.read_u32le()?; //rate
 267     dmx.src.read_skip(4)?; //start
 268     dmx.src.read_skip(4)?; //length
 269     dmx.src.read_skip(4)?; //buf size
 270     dmx.src.read_skip(4)?; //quality
 271     dmx.src.read_skip(4)?; //sample size
 272     let a = dmx.src.read_u16le()?;
 273     let b = dmx.src.read_u16le()?;
 274     let c = dmx.src.read_u16le()?;
 275     let d = dmx.src.read_u16le()?;
 276
 277     dmx.src.read_skip(size - 0x38)?;
 278
 279     if !dmx.sstate.valid_state() || dmx.sstate.strm_no >= dmx.num_streams {
 280         return Err(InvalidData);
 281     }
 282     if tag == mktag!(b"vids") {
 283         dmx.sstate.strm_type = Some(StreamType::Video);
 284     } else if tag == mktag!(b"auds") {
 285         dmx.sstate.strm_type = Some(StreamType::Audio);
 286     } else {
 287         dmx.sstate.strm_type = Some(StreamType::Data);
 288     }
 289     dmx.sstate.got_strf = false;
 290
 291     Ok(size)
 292 }
 293
 294 fn parse_strf(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 295     if let None = dmx.sstate.strm_type { return Err(InvalidData); }
 296     match dmx.sstate.strm_type.unwrap() {
 297         StreamType::Video    => parse_strf_vids(dmx, size),
 298         StreamType::Audio    => parse_strf_auds(dmx, size),
 299         _                    => parse_strf_xxxx(dmx, size),
 300     }
 301 }
 302
 303 #[allow(unused_variables)]
 304 fn parse_strf_vids(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 305     if size < 40 { return Err(InvalidData); }
 306     let bi_size         = dmx.src.read_u32le()?;
 307     if (bi_size as usize) > size { return Err(InvalidData); }
 308     let width           = dmx.src.read_u32le()?;
 309     let height          = dmx.src.read_u32le()? as i32;
 310     let planes          = dmx.src.read_u16le()?;
 311     let bitcount        = dmx.src.read_u16le()?;
 312     let mut compression: [u8; 4] = [0; 4];
 313                           dmx.src.read_buf(&mut compression)?;
 314     let img_size        = dmx.src.read_u32le()?;
 315     let xdpi            = dmx.src.read_u32le()?;
 316     let ydpi            = dmx.src.read_u32le()?;
 317     let colors          = dmx.src.read_u32le()?;
 318     let imp_colors      = dmx.src.read_u32le()?;
 319
 320     let flip = height < 0;
 321     let format = if bitcount > 8 { RGB24_FORMAT } else { PAL8_FORMAT };
 322     let vhdr = NAVideoInfo::new(width as usize, if flip { -height as usize } else { height as usize}, flip, PAL8_FORMAT);
 323     let vci = NACodecTypeInfo::Video(vhdr);
 324     let edata = dmx.read_extradata(size - 40)?;
 325     let cname = match register::find_codec_from_avi_fourcc(&compression) {
 326                     None => "unknown",
 327                     Some(name) => name,
 328                 };
 329     let vinfo = NACodecInfo::new(cname, vci, edata);
 330     let res = dmx.dmx.add_stream(NAStream::new(StreamType::Video, dmx.sstate.strm_no as u32, vinfo, dmx.tb_num, dmx.tb_den));
 331     if let None = res { return Err(MemoryError); }
 332     dmx.sstate.reset();
 333     Ok(size)
 334 }
 335
 336 #[allow(unused_variables)]
 337 fn parse_strf_auds(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 338     if size < 16 { return Err(InvalidData); }
 339     let w_format_tag        = dmx.src.read_u16le()?;
 340     let channels            = dmx.src.read_u16le()?;
 341     let samplespersec       = dmx.src.read_u32le()?;
 342     let avgbytespersec      = dmx.src.read_u32le()?;
 343     let block_align         = dmx.src.read_u16le()?;
 344     let bits_per_sample     = dmx.src.read_u16le()? * 8;
 345
 346     let soniton = NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED);
 347     let ahdr = NAAudioInfo::new(samplespersec, channels as u8, soniton, block_align as usize);
 348     let edata = dmx.read_extradata(size - 16)?;
 349     let cname = match register::find_codec_from_wav_twocc(w_format_tag) {
 350                     None => "unknown",
 351                     Some(name) => name,
 352                 };
 353     let ainfo = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata);
 354     let res = dmx.dmx.add_stream(NAStream::new(StreamType::Audio, dmx.sstate.strm_no as u32, ainfo, dmx.tb_num, dmx.tb_den));
 355     if let None = res { return Err(MemoryError); }
 356     dmx.sstate.reset();
 357     Ok(size)
 358 }
 359
 360 fn parse_strf_xxxx(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 361     let edata = dmx.read_extradata(size)?;
 362     let info = NACodecInfo::new("unknown", NACodecTypeInfo::None, edata);
 363     let res = dmx.dmx.add_stream(NAStream::new(StreamType::Data, dmx.sstate.strm_no as u32, info, dmx.tb_num, dmx.tb_den));
 364     if let None = res { return Err(MemoryError); }
 365     dmx.sstate.reset();
 366     Ok(size)
 367 }
 368
 369 #[allow(unused_variables)]
 370 fn parse_avih(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 371     if size < 0x38 { return Err(InvalidData); }
 372     let timebase = dmx.src.read_u32le()?; //microsec per frame
 373     dmx.src.read_skip(4)?; //max frame size
 374     dmx.src.read_skip(4)?; //padding
 375     dmx.src.read_u32le()?; //flags
 376     let frames = dmx.src.read_u32le()?; //frames
 377     dmx.src.read_skip(4)?; //initial frames
 378     let streams = dmx.src.read_u32le()?; //streams
 379     if streams > 100 { return Err(InvalidData); }
 380     dmx.num_streams = streams as u8;
 381
 382     dmx.src.read_skip(4)?; //buf size
 383     let width = dmx.src.read_u32le()?; //width
 384     let height = dmx.src.read_u32le()? as i32; //height
 385     dmx.src.read_skip(16)?; //reserved
 386
 387     dmx.cur_frame.resize(streams as usize, 0);
 388     dmx.src.read_skip(size - 0x38)?;
 389     Ok(size)
 390 }
 391
 392 fn parse_junk(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
 393     dmx.src.read_skip(size)?;
 394     Ok(size)
 395 }
 396
 397 pub struct AVIDemuxerCreator { }
 398
 399 impl DemuxerCreator for AVIDemuxerCreator {
 400     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<Demux<'a> + 'a> {
 401         Box::new(AVIDemuxer::new(br))
 402     }
 403     fn get_name(&self) -> &'static str { "avi" }
 404 }
 405
 406 #[cfg(test)]
 407 mod test {
 408     use super::*;
 409     use std::fs::File;
 410
 411     #[test]
 412     fn test_avi_demux() {
 413         let mut file = File::open("assets/laser05.avi").unwrap();
 414         let mut fr = FileReader::new_read(&mut file);
 415         let mut br = ByteReader::new(&mut fr);
 416         let mut dmx = AVIDemuxer::new(&mut br);
 417         dmx.open().unwrap();
 418
 419         loop {
 420             let pktres = dmx.get_frame();
 421             if let Err(e) = pktres {
 422                 if e == DemuxerError::EOF { break; }
 423                 panic!("error");
 424             }
 425             let pkt = pktres.unwrap();
 426             println!("Got {}", pkt);
 427         }
 428     }
 429 }