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