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