nihav-commonfmt/src/demuxers/mov.rs

   1 use nihav_core::demuxers::*;
   2 use nihav_registry::register::*;
   3
   4 macro_rules! mktag {
   5     ($a:expr, $b:expr, $c:expr, $d:expr) => ({
   6         (($a as u32) << 24) | (($b as u32) << 16) | (($c as u32) << 8) | ($d as u32)
   7     });
   8     ($arr:expr) => ({
   9         (($arr[0] as u32) << 24) | (($arr[1] as u32) << 16) | (($arr[2] as u32) << 8) | ($arr[3] as u32)
  10     });
  11 }
  12
  13 trait Skip64 {
  14     fn skip64(&mut self, size: u64) -> ByteIOResult<()>;
  15 }
  16
  17 impl<'a> Skip64 for ByteReader<'a> {
  18     fn skip64(&mut self, size: u64) -> ByteIOResult<()> {
  19         if (size as usize as u64) != size {
  20             self.seek(SeekFrom::Current(size as i64))?;
  21         } else {
  22             self.read_skip(size as usize)?;
  23         }
  24         Ok(())
  25     }
  26 }
  27
  28 fn read_chunk_header(br: &mut ByteReader) -> DemuxerResult<(u32, u64)> {
  29     let size            = br.read_u32be()?;
  30     let ctype           = br.read_u32be()?;
  31     if size == 0 {
  32         Ok((ctype, br.left() as u64))
  33     } else if size == 1 {
  34         let size64      = br.read_u64be()?;
  35         validate!(size64 >= 16);
  36         Ok((ctype, size64 - 16))
  37     } else {
  38         validate!(size >= 8);
  39         Ok((ctype, (size as u64) - 8))
  40     }
  41 }
  42
  43 struct RootChunkHandler {
  44     ctype:  u32,
  45     parse:  fn(dmx: &mut MOVDemuxer, strmgr: &mut StreamManager, size: u64) -> DemuxerResult<u64>,
  46 }
  47
  48 struct TrackChunkHandler {
  49     ctype:  u32,
  50     parse:  fn(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64>,
  51 }
  52
  53 const IGNORED_CHUNKS: &[u32] = &[
  54     mktag!(b"free"), mktag!(b"skip"), mktag!(b"udta"), mktag!(b"wide")
  55 ];
  56
  57 const ROOT_CHUNK_HANDLERS: &[RootChunkHandler] = &[
  58     RootChunkHandler { ctype: mktag!(b"mdat"), parse: read_mdat },
  59     RootChunkHandler { ctype: mktag!(b"moov"), parse: read_moov },
  60 ];
  61
  62 macro_rules! read_chunk_list {
  63     (root; $name: expr, $fname: ident, $handlers: ident) => {
  64         fn $fname(&mut self, strmgr: &mut StreamManager, size: u64) -> DemuxerResult<()> {
  65             self.depth += 1;
  66             validate!(self.depth < 32);
  67             let list_end = self.src.tell() + size;
  68             while self.src.tell() < list_end {
  69                 let ret = read_chunk_header(&mut self.src);
  70                 if ret.is_err() { break; }
  71                 let (ctype, size) = ret.unwrap();
  72                 if self.src.tell() + size > list_end {
  73                     break;
  74                 }
  75                 if IGNORED_CHUNKS.contains(&ctype) {
  76                     self.src.skip64(size)?;
  77                     continue;
  78                 }
  79                 let handler = $handlers.iter().find(|x| x.ctype == ctype);
  80                 let read_size;
  81                 if let Some(ref handler) = handler {
  82                     read_size = (handler.parse)(self, strmgr, size)?;
  83                 } else {
  84                     println!("skipping unknown chunk {:08X} size {}", ctype, size);
  85                     read_size = 0;
  86                 }
  87                 validate!(read_size <= size);
  88                 self.src.skip64(size - read_size)?;
  89             }
  90             self.depth -= 1;
  91             validate!(self.src.tell() == list_end);
  92             Ok(())
  93         }
  94     };
  95     (track; $name: expr, $fname: ident, $handlers: ident) => {
  96         fn $fname(&mut self, br: &mut ByteReader, size: u64) -> DemuxerResult<()> {
  97             self.depth += 1;
  98             validate!(self.depth < 32);
  99             let list_end = br.tell() + size;
 100             while br.tell() < list_end {
 101                 let ret = read_chunk_header(br);
 102                 if ret.is_err() { break; }
 103                 let (ctype, size) = ret.unwrap();
 104                 if br.tell() + size > list_end {
 105                     break;
 106                 }
 107                 if IGNORED_CHUNKS.contains(&ctype) {
 108                     br.skip64(size)?;
 109                     continue;
 110                 }
 111                 let handler = $handlers.iter().find(|x| x.ctype == ctype);
 112                 let read_size;
 113                 if let Some(ref handler) = handler {
 114                     read_size = (handler.parse)(self, br, size)?;
 115                 } else {
 116                     read_size = 0;
 117                 }
 118                 validate!(read_size <= size);
 119                 br.skip64(size - read_size)?;
 120             }
 121             self.depth -= 1;
 122             validate!(br.tell() == list_end);
 123             Ok(())
 124         }
 125     }
 126 }
 127
 128 fn skip_chunk(_track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 129     br.skip64(size)?;
 130     Ok(size)
 131 }
 132
 133 fn read_mdat(dmx: &mut MOVDemuxer, _strmgr: &mut StreamManager, size: u64) -> DemuxerResult<u64> {
 134     dmx.mdat_pos  = dmx.src.tell();
 135     dmx.mdat_size = size;
 136     dmx.src.skip64(size)?;
 137     Ok(size)
 138 }
 139
 140 fn read_moov(dmx: &mut MOVDemuxer, strmgr: &mut StreamManager, size: u64) -> DemuxerResult<u64> {
 141     dmx.read_moov(strmgr, size)?;
 142     Ok(size)
 143 }
 144
 145 const MOOV_CHUNK_HANDLERS: &[RootChunkHandler] = &[
 146     RootChunkHandler { ctype: mktag!(b"mvhd"), parse: read_mvhd },
 147     RootChunkHandler { ctype: mktag!(b"trak"), parse: read_trak },
 148 ];
 149
 150 fn read_mvhd(dmx: &mut MOVDemuxer, _strmgr: &mut StreamManager, size: u64) -> DemuxerResult<u64> {
 151     const KNOWN_MVHD_SIZE: u64 = 100;
 152     let br = &mut dmx.src;
 153     validate!(size >= KNOWN_MVHD_SIZE);
 154     let version             = br.read_byte()?;
 155     validate!(version == 0);
 156     let _flags              = br.read_u24be()?;
 157     let _ctime              = br.read_u32be()?;
 158     let _mtime              = br.read_u32be()?;
 159     let tscale              = br.read_u32be()?;
 160     let duration            = br.read_u32be()?;
 161     let _pref_rate          = br.read_u32be()?;
 162     let _pref_volume        = br.read_u16be()?;
 163                               br.read_skip(10)?;
 164                               br.read_skip(36)?; // matrix
 165     let _preview_time       = br.read_u32be()?;
 166     let _preview_duration   = br.read_u32be()?;
 167     let _poster_time        = br.read_u32be()?;
 168     let _sel_time           = br.read_u32be()?;
 169     let _sel_duration       = br.read_u32be()?;
 170     let _cur_time           = br.read_u32be()?;
 171     let _next_track_id      = br.read_u32be()?;
 172     dmx.duration = duration;
 173     dmx.tb_den = tscale;
 174
 175     Ok(KNOWN_MVHD_SIZE)
 176 }
 177
 178 fn read_trak(dmx: &mut MOVDemuxer, strmgr: &mut StreamManager, size: u64) -> DemuxerResult<u64> {
 179     let mut track = Track::new(dmx.cur_track as u32, dmx.tb_den);
 180     track.read_trak(&mut dmx.src, size)?;
 181     validate!(track.tkhd_found && track.stsd_found);
 182     validate!(strmgr.get_stream_by_id(track.track_id).is_none());
 183     dmx.cur_track += 1;
 184     let mut str = None;
 185     std::mem::swap(&mut track.stream, &mut str);
 186     if let Some(stream) = str {
 187         let str_id = strmgr.add_stream(stream).unwrap();
 188         track.track_str_id = str_id;
 189     }
 190     dmx.tracks.push(track);
 191     Ok(size)
 192 }
 193
 194 const TRAK_CHUNK_HANDLERS: &[TrackChunkHandler] = &[
 195     TrackChunkHandler { ctype: mktag!(b"clip"), parse: skip_chunk },
 196     TrackChunkHandler { ctype: mktag!(b"matt"), parse: skip_chunk },
 197     TrackChunkHandler { ctype: mktag!(b"edts"), parse: skip_chunk },
 198     TrackChunkHandler { ctype: mktag!(b"tref"), parse: skip_chunk },
 199     TrackChunkHandler { ctype: mktag!(b"load"), parse: skip_chunk },
 200     TrackChunkHandler { ctype: mktag!(b"imap"), parse: skip_chunk },
 201     TrackChunkHandler { ctype: mktag!(b"tkhd"), parse: read_tkhd },
 202     TrackChunkHandler { ctype: mktag!(b"mdia"), parse: read_mdia },
 203 ];
 204
 205 fn read_tkhd(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 206     const KNOWN_TKHD_SIZE: u64 = 84;
 207     validate!(size >= KNOWN_TKHD_SIZE);
 208     let version             = br.read_byte()?;
 209     validate!(version == 0);
 210     let _flags              = br.read_u24be()?;
 211     let _ctime              = br.read_u32be()?;
 212     let _mtime              = br.read_u32be()?;
 213     let track_id            = br.read_u32be()?;
 214                               br.read_skip(4)?;
 215     let _duration           = br.read_u32be()?;
 216                               br.read_skip(8)?;
 217     let _layer              = br.read_u16be()?;
 218     let _alt_group          = br.read_u16be()?;
 219     let _volume             = br.read_u16be()?;
 220                               br.read_skip(2)?;
 221                               br.read_skip(36)?; // matrix
 222     let width               = br.read_u32be()? as usize;
 223     let height              = br.read_u32be()? as usize;
 224     track.width  = width  >> 16;
 225     track.height = height >> 16;
 226     track.track_id = track_id;
 227
 228     track.tkhd_found = true;
 229     Ok(KNOWN_TKHD_SIZE)
 230 }
 231
 232 fn read_mdia(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 233     track.stream_type = StreamType::None;
 234     track.read_mdia(br, size)?;
 235     Ok(size)
 236 }
 237
 238 const MDIA_CHUNK_HANDLERS: &[TrackChunkHandler] = &[
 239     TrackChunkHandler { ctype: mktag!(b"mdhd"), parse: skip_chunk },
 240     TrackChunkHandler { ctype: mktag!(b"hdlr"), parse: read_hdlr },
 241     TrackChunkHandler { ctype: mktag!(b"minf"), parse: read_minf },
 242 ];
 243
 244 fn read_hdlr(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 245     const KNOWN_HDLR_SIZE: u64 = 24;
 246     validate!(size >= KNOWN_HDLR_SIZE);
 247     let version             = br.read_byte()?;
 248     validate!(version == 0);
 249     let flags               = br.read_u24be()?;
 250     validate!(flags == 0);
 251     let comp_type           = br.read_u32be()?;
 252     let comp_subtype        = br.read_u32be()?;
 253     let _comp_manufacturer  = br.read_u32be()?;
 254     let _comp_flags         = br.read_u32be()?;
 255     let _comp_flags_mask    = br.read_u32be()?;
 256
 257     if comp_type == mktag!(b"mhlr") {
 258         if comp_subtype == mktag!(b"vide") {
 259             track.stream_type = StreamType::Video;
 260         } else if comp_subtype == mktag!(b"soun") {
 261             track.stream_type = StreamType::Audio;
 262         } else {
 263             track.stream_type = StreamType::Data;
 264         }
 265     } else if comp_type == mktag!(b"dhlr") {
 266         track.stream_type = StreamType::Data;
 267     } else {
 268         println!("Unknown stream type");
 269         track.stream_type = StreamType::Data;
 270     }
 271
 272     Ok(KNOWN_HDLR_SIZE)
 273 }
 274
 275 fn read_minf(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 276     track.read_minf(br, size)?;
 277     Ok(size)
 278 }
 279
 280 const MINF_CHUNK_HANDLERS: &[TrackChunkHandler] = &[
 281     TrackChunkHandler { ctype: mktag!(b"hdlr"), parse: skip_chunk },
 282     TrackChunkHandler { ctype: mktag!(b"dinf"), parse: skip_chunk },
 283     TrackChunkHandler { ctype: mktag!(b"vmhd"), parse: read_vmhd },
 284     TrackChunkHandler { ctype: mktag!(b"smhd"), parse: read_smhd },
 285     TrackChunkHandler { ctype: mktag!(b"gmhd"), parse: read_gmhd },
 286     TrackChunkHandler { ctype: mktag!(b"gmin"), parse: read_gmin },
 287     TrackChunkHandler { ctype: mktag!(b"stbl"), parse: read_stbl },
 288 ];
 289
 290 fn read_vmhd(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 291     const KNOWN_VMHD_SIZE: u64 = 12;
 292     validate!(track.stream_type == StreamType::Video);
 293     validate!(size >= KNOWN_VMHD_SIZE);
 294     let version             = br.read_byte()?;
 295     validate!(version == 0);
 296     let _flags              = br.read_u24be()?;
 297                               br.read_skip(2)?; // graphics mode
 298                               br.read_skip(6)?; // opcolor
 299     Ok(KNOWN_VMHD_SIZE)
 300 }
 301
 302 fn read_smhd(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 303     const KNOWN_SMHD_SIZE: u64 = 8;
 304     validate!(track.stream_type == StreamType::Audio);
 305     validate!(size >= KNOWN_SMHD_SIZE);
 306     let version             = br.read_byte()?;
 307     validate!(version == 0);
 308     let _flags              = br.read_u24be()?;
 309                               br.read_skip(2)?; // balance
 310                               br.read_skip(2)?;
 311     Ok(KNOWN_SMHD_SIZE)
 312 }
 313
 314 fn read_gmhd(track: &mut Track, _br: &mut ByteReader, _size: u64) -> DemuxerResult<u64> {
 315     validate!(track.stream_type == StreamType::Data);
 316     Ok(0)
 317 }
 318
 319 fn read_gmin(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 320     validate!(track.stream_type == StreamType::Data);
 321     const KNOWN_GMIN_SIZE: u64 = 16;
 322     validate!(size >= KNOWN_GMIN_SIZE);
 323     let version             = br.read_byte()?;
 324     validate!(version == 0);
 325     let _flags              = br.read_u24be()?;
 326                               br.read_skip(2)?; // graphics mode
 327                               br.read_skip(6)?; // opcolor
 328                               br.read_skip(2)?; // balance
 329                               br.read_skip(2)?;
 330     Ok(KNOWN_GMIN_SIZE)
 331 }
 332
 333 fn read_stbl(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 334     track.read_stbl(br, size)?;
 335     Ok(size)
 336 }
 337
 338 const STBL_CHUNK_HANDLERS: &[TrackChunkHandler] = &[
 339     TrackChunkHandler { ctype: mktag!(b"stsd"), parse: read_stsd },
 340     TrackChunkHandler { ctype: mktag!(b"stts"), parse: skip_chunk },
 341     TrackChunkHandler { ctype: mktag!(b"stss"), parse: read_stss },
 342     TrackChunkHandler { ctype: mktag!(b"stsc"), parse: read_stsc },
 343     TrackChunkHandler { ctype: mktag!(b"stsz"), parse: read_stsz },
 344     TrackChunkHandler { ctype: mktag!(b"stco"), parse: read_stco },
 345     TrackChunkHandler { ctype: mktag!(b"stsh"), parse: skip_chunk },
 346 ];
 347
 348 fn read_stsd(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 349     const KNOWN_STSD_SIZE: u64 = 24;
 350     validate!(size >= KNOWN_STSD_SIZE);
 351     let start_pos = br.tell();
 352     let version             = br.read_byte()?;
 353     validate!(version == 0);
 354     let _flags              = br.read_u24be()?;
 355     let entries             = br.read_u32be()?;
 356     validate!(entries > 0);
 357     let esize               = br.read_u32be()? as u64;
 358     validate!(esize + 8 <= size);
 359     let mut fcc = [0u8; 4];
 360                               br.read_buf(&mut fcc)?;
 361                               br.read_skip(6)?;
 362     let _data_ref           = br.read_u16be()?;
 363
 364     track.fcc = fcc;
 365
 366     let codec_info;
 367     match track.stream_type {
 368         StreamType::Video => {
 369             let _ver            = br.read_u16be()?;
 370             let _revision       = br.read_u16le()?;
 371             let _vendor         = br.read_u32be()?;
 372             let _temp_quality   = br.read_u32be()?;
 373             let _spat_quality   = br.read_u32be()?;
 374             let width           = br.read_u16be()? as usize;
 375             let height          = br.read_u16be()? as usize;
 376             let _hor_res        = br.read_u32be()?;
 377             let _vert_res       = br.read_u32be()?;
 378             let data_size       = br.read_u32be()?;
 379             validate!(data_size == 0);
 380             let _frame_count    = br.read_u16be()? as usize;
 381             let _cname_len      = br.read_byte()? as usize;
 382                                   br.read_skip(31)?; // actual compressor name
 383             let depth           = br.read_u16be()?;
 384             let ctable_id       = br.read_u16be()?;
 385             validate!((depth <= 8) || (ctable_id == 0xFFFF));
 386             if ctable_id == 0 {
 387 unimplemented!();
 388             }
 389 // todo other atoms, put as extradata
 390             let cname = if let Some(name) = find_codec_from_mov_video_fourcc(&fcc) {
 391                     name
 392                 } else if let Some(name) = find_codec_from_avi_fourcc(&fcc) {
 393                     name
 394                 } else {
 395                     "unknown"
 396                 };
 397             let format = if depth > 8 { RGB24_FORMAT } else { PAL8_FORMAT };
 398             let vhdr = NAVideoInfo::new(width, height, false, format);
 399             let edata;
 400             if br.tell() - start_pos + 4 < size {
 401 //todo skip various common atoms
 402                 let edata_size  = br.read_u32be()? as usize;
 403                 let mut buf = vec![0; edata_size];
 404                                   br.read_buf(buf.as_mut_slice())?;
 405                 edata = Some(buf);
 406             } else {
 407                 edata = None;
 408             }
 409             codec_info = NACodecInfo::new(cname, NACodecTypeInfo::Video(vhdr), edata);
 410         },
 411         StreamType::Audio => {
 412             let _ver            = br.read_u16be()?;
 413             let _revision       = br.read_u16le()?;
 414             let _vendor         = br.read_u32be()?;
 415             let nchannels       = br.read_u16be()?;
 416             validate!(nchannels <= 64);
 417             let sample_size     = br.read_u16be()?;
 418             validate!(sample_size <= 128);
 419             let _compr_id       = br.read_u16be()?;
 420             let packet_size     = br.read_u16be()? as usize;
 421             validate!(packet_size == 0);
 422             let sample_rate     = br.read_u32be()?;
 423             validate!(sample_rate > 0);
 424             let cname = if let Some(name) = find_codec_from_mov_audio_fourcc(&fcc) {
 425                     name
 426                 } else if let (true, Some(name)) = ((fcc[0] == b'm' && fcc[1] == b's'),  find_codec_from_wav_twocc(u16::from(fcc[2]) * 256 + u16::from(fcc[3]))) {
 427                     name
 428                 } else {
 429                     "unknown"
 430                 };
 431 //todo adjust format for various PCM kinds
 432             let soniton = NASoniton::new(sample_size as u8, SONITON_FLAG_SIGNED | SONITON_FLAG_BE);
 433             let block_align = 1;
 434             let ahdr = NAAudioInfo::new(sample_rate >> 16, nchannels as u8, soniton, block_align);
 435             let edata = None;
 436             codec_info = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata);
 437             track.channels  = nchannels as usize;
 438             track.bits      = sample_size as usize;
 439         },
 440         StreamType::None => {
 441             return Err(DemuxerError::InvalidData);
 442         },
 443         _ => {
 444 //todo put it all into extradata
 445             let edata = None;
 446             codec_info = NACodecInfo::new("unknown", NACodecTypeInfo::None, edata);
 447         },
 448     };
 449     let read_size = br.tell() - start_pos;
 450     validate!(read_size <= size);
 451     track.stream = Some(NAStream::new(track.stream_type, track.track_no, codec_info, 1, track.tb_den));
 452     track.stsd_found = true;
 453     Ok(read_size)
 454 }
 455
 456 fn read_stss(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 457     let version             = br.read_byte()?;
 458     validate!(version == 0);
 459     let _flags              = br.read_u24be()?;
 460     let entries             = br.read_u32be()? as usize;
 461     validate!(entries < ((std::u32::MAX >> 2) - 8) as usize);
 462     validate!((entries * 4 + 8) as u64 == size);
 463     track.keyframes = Vec::with_capacity(entries);
 464     let mut last_sample_no = 0;
 465     for _ in 0..entries {
 466         let sample_no       = br.read_u32be()?;
 467         validate!(sample_no > last_sample_no);
 468         track.keyframes.push(sample_no);
 469         last_sample_no = sample_no;
 470     }
 471     Ok(size)
 472 }
 473
 474 fn read_stsc(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 475     let version             = br.read_byte()?;
 476     validate!(version == 0);
 477     let _flags              = br.read_u24be()?;
 478     let entries             = br.read_u32be()? as usize;
 479     validate!(entries < ((std::u32::MAX / 12) - 8) as usize);
 480     validate!((entries * 12 + 8) as u64 == size);
 481     track.sample_map = Vec::with_capacity(entries);
 482     let mut last_sample_no = 0;
 483     for _i in 0..entries {
 484         let sample_no       = br.read_u32be()?;
 485         validate!(sample_no > last_sample_no);
 486         let nsamples        = br.read_u32be()?;
 487         let _sample_desc    = br.read_u32be()?;
 488         track.sample_map.push((sample_no, nsamples));
 489         last_sample_no = sample_no;
 490     }
 491     Ok(size)
 492 }
 493
 494 fn read_stsz(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 495     let version             = br.read_byte()?;
 496     validate!(version == 0);
 497     let _flags              = br.read_u24be()?;
 498     let sample_size         = br.read_u32be()?;
 499     if sample_size != 0 {
 500         track.sample_size = sample_size;
 501         Ok(8)
 502     } else {
 503         let entries             = br.read_u32be()? as usize;
 504         validate!((entries * 4 + 12) as u64 == size);
 505         track.chunk_sizes = Vec::with_capacity(entries);
 506         for _ in 0..entries {
 507             let sample_size     = br.read_u32be()?;
 508             track.chunk_sizes.push(sample_size);
 509         }
 510         Ok(size)
 511     }
 512 }
 513
 514 fn read_stco(track: &mut Track, br: &mut ByteReader, size: u64) -> DemuxerResult<u64> {
 515     let version             = br.read_byte()?;
 516     validate!(version == 0);
 517     let _flags              = br.read_u24be()?;
 518     let entries             = br.read_u32be()? as usize;
 519     validate!((entries * 4 + 8) as u64 == size);
 520     track.chunk_offsets = Vec::with_capacity(entries);
 521     for _i in 0..entries {
 522         let sample_offset   = br.read_u32be()?;
 523         track.chunk_offsets.push(u64::from(sample_offset));
 524     }
 525     Ok(size)
 526 }
 527
 528 struct MOVDemuxer<'a> {
 529     src:            &'a mut ByteReader<'a>,
 530     depth:          usize,
 531     mdat_pos:       u64,
 532     mdat_size:      u64,
 533     tracks:         Vec<Track>,
 534     cur_track:      usize,
 535     tb_den:         u32,
 536     duration:       u32,
 537 }
 538
 539 struct Track {
 540     track_id:       u32,
 541     track_str_id:   usize,
 542     track_no:       u32,
 543     tb_den:         u32,
 544     depth:          u8,
 545     tkhd_found:     bool,
 546     stsd_found:     bool,
 547     stream_type:    StreamType,
 548     width:          usize,
 549     height:         usize,
 550     channels:       usize,
 551     bits:           usize,
 552     fcc:            [u8; 4],
 553     keyframes:      Vec<u32>,
 554     chunk_sizes:    Vec<u32>,
 555     chunk_offsets:  Vec<u64>,
 556     sample_map:     Vec<(u32, u32)>,
 557     sample_size:    u32,
 558     stream:         Option<NAStream>,
 559     cur_chunk:      usize,
 560     cur_sample:     usize,
 561     samples_left:   usize,
 562     last_offset:    u64,
 563 }
 564
 565 impl Track {
 566     fn new(track_no: u32, tb_den: u32) -> Self {
 567         Self {
 568             tkhd_found:     false,
 569             stsd_found:     false,
 570             track_id:       0,
 571             track_str_id:   0,
 572             track_no,
 573             tb_den,
 574             stream_type:    StreamType::None,
 575             width:          0,
 576             height:         0,
 577             channels:       0,
 578             bits:           0,
 579             fcc:            [0; 4],
 580             keyframes:      Vec::new(),
 581             chunk_sizes:    Vec::new(),
 582             chunk_offsets:  Vec::new(),
 583             sample_map:     Vec::new(),
 584             sample_size:    0,
 585             stream:         None,
 586             depth:          0,
 587             cur_chunk:      0,
 588             cur_sample:     0,
 589             samples_left:   0,
 590             last_offset:    0,
 591         }
 592     }
 593     read_chunk_list!(track; "trak", read_trak, TRAK_CHUNK_HANDLERS);
 594     read_chunk_list!(track; "mdia", read_mdia, MDIA_CHUNK_HANDLERS);
 595     read_chunk_list!(track; "minf", read_minf, MINF_CHUNK_HANDLERS);
 596     read_chunk_list!(track; "stbl", read_stbl, STBL_CHUNK_HANDLERS);
 597     fn fill_seek_index(&self, seek_index: &mut SeekIndex) {
 598         if self.keyframes.len() > 0 {
 599             seek_index.mode = SeekIndexMode::Present;
 600         }
 601         for kf_time in self.keyframes.iter() {
 602             let pts = u64::from(*kf_time - 1);
 603             let time = NATimeInfo::ts_to_time(pts, 1000, 1, self.tb_den);
 604             let idx = (*kf_time - 1) as usize;
 605             if idx < self.chunk_offsets.len() {
 606                 let pos = self.chunk_offsets[idx];
 607                 seek_index.add_entry(self.track_no as u32, SeekEntry { time, pts, pos });
 608             }
 609         }
 610     }
 611     fn calculate_chunk_size(&self, nsamp: usize) -> usize {
 612         if nsamp == 0 {
 613             self.sample_size as usize
 614         } else {
 615             match &self.fcc {
 616                 b"NONE" | b"raw " | b"twos" | b"sowt" => {
 617                     (nsamp * self.bits * self.channels + 7) >> 3
 618                 },
 619                 b"ima4" => {
 620                     let nblocks = (nsamp + 63) >> 6;
 621                     nblocks * 34 * self.channels
 622                 },
 623                 b"MAC3" => {
 624                     (nsamp + 5) / 6 * 2 * self.channels
 625                 },
 626                 b"MAC6" => {
 627                     (nsamp + 5) / 6 * self.channels
 628                 },
 629                 b"in24" => nsamp * 3 * self.channels,
 630                 b"in32" | b"fl32" => nsamp * 4 * self.channels,
 631                 b"fl64" => nsamp * 8 * self.channels,
 632                 b"ulaw" | b"alaw" => nsamp,
 633                 b"ms\x00\x02" => { //MS ADPCM
 634                     ((nsamp - 1) / 2 + 7) * self.channels
 635                 },
 636                 b"ms\x00\x21" => { //IMA ADPCM
 637                     (nsamp / 2 + 4) * self.channels
 638                 },
 639                 _ => self.sample_size as usize,
 640             }
 641         }
 642     }
 643     fn get_next_chunk(&mut self) -> Option<(NATimeInfo, u64, usize)> {
 644         let pts = NATimeInfo::new(Some(self.cur_sample as u64), None, None, 1, self.tb_den);
 645 //todo dts decoding
 646         if self.chunk_offsets.len() == self.chunk_sizes.len() { // simple one-to-one mapping
 647             if self.cur_sample >= self.chunk_sizes.len() {
 648                 return None;
 649             }
 650             let offset = self.chunk_offsets[self.cur_sample];
 651             let size   = self.chunk_sizes[self.cur_sample] as usize;
 652             self.cur_sample += 1;
 653             Some((pts, offset, size))
 654         } else {
 655             if self.samples_left == 0 {
 656                 if self.cur_chunk >= self.chunk_offsets.len() {
 657                     return None;
 658                 }
 659                 for (idx, samples) in self.sample_map.iter() {
 660                     if *idx as usize <= self.cur_chunk + 1 {
 661                         self.samples_left = *samples as usize;
 662                     } else {
 663                         break;
 664                     }
 665                 }
 666                 self.last_offset = self.chunk_offsets[self.cur_chunk];
 667                 self.cur_chunk += 1;
 668             }
 669             let offset = self.last_offset;
 670             let size = self.get_size(self.cur_sample);
 671             self.last_offset += size as u64;
 672             if self.stream_type == StreamType::Video {
 673                 self.samples_left -= 1;
 674             } else {
 675                 self.samples_left = 0;
 676             }
 677             self.cur_sample += 1;
 678             Some((pts, offset, size))
 679         }
 680     }
 681     fn get_size(&self, sample_no: usize) -> usize {
 682         if self.chunk_sizes.len() > 0 {
 683             self.chunk_sizes[sample_no] as usize
 684         } else if self.sample_map.len() > 0 {
 685             let mut nsamp = 0;
 686             for (idx, samples) in self.sample_map.iter() {
 687                 if *idx as usize <= self.cur_chunk {
 688                     nsamp = *samples;
 689                 } else {
 690                     break;
 691                 }
 692             }
 693             self.calculate_chunk_size(nsamp as usize)
 694         } else {
 695             self.sample_size as usize
 696         }
 697     }
 698     fn seek(&mut self, pts: u64) {
 699         self.cur_sample = pts as usize;
 700         self.samples_left = 0;
 701         if self.stream_type == StreamType::Audio {
 702             self.cur_chunk = self.cur_sample;
 703         } else if self.chunk_offsets.len() != self.chunk_sizes.len() && self.sample_map.len() > 0{
 704             let mut csamp = 0;
 705             self.cur_chunk = 0;
 706             let mut cmap = self.sample_map.iter();
 707             let mut cur_samps = 0;
 708             let (mut next_idx, mut next_samples) = cmap.next().unwrap();
 709             loop {
 710                 if self.cur_chunk == next_idx as usize {
 711                     self.samples_left = cur_samps;
 712                     cur_samps = next_samples as usize;
 713                     if let Some((new_idx, new_samples)) = cmap.next() {
 714                         next_idx = *new_idx;
 715                         next_samples = *new_samples;
 716                     }
 717                 }
 718                 csamp += cur_samps;
 719                 if csamp >= self.cur_sample {
 720                     self.last_offset = self.chunk_offsets[self.cur_chunk];
 721                     break;
 722                 }
 723                 self.cur_chunk += 1;
 724             }
 725             csamp -= cur_samps;
 726             for sample_no in csamp..self.cur_chunk {
 727                 self.last_offset += self.get_size(sample_no) as u64;
 728             }
 729             self.samples_left = self.cur_sample - csamp - cur_samps;
 730         }
 731     }
 732 }
 733
 734 impl<'a> DemuxCore<'a> for MOVDemuxer<'a> {
 735     fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> {
 736         self.read_root(strmgr)?;
 737         validate!(self.mdat_pos > 0);
 738         validate!(self.tracks.len() > 0);
 739         for track in self.tracks.iter() {
 740             track.fill_seek_index(seek_index);
 741         }
 742         self.src.seek(SeekFrom::Start(self.mdat_pos))?;
 743         self.cur_track = 0;
 744         Ok(())
 745     }
 746
 747     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
 748         if self.tracks.len() == 0 {
 749             return Err(DemuxerError::EOF);
 750         }
 751         for _ in 0..self.tracks.len() {
 752             if self.cur_track >= self.tracks.len() {
 753                 self.cur_track = 0;
 754             }
 755             let track = &mut self.tracks[self.cur_track];
 756             self.cur_track += 1;
 757             if let Some((pts, offset, size)) = track.get_next_chunk() {
 758                 let str = strmgr.get_stream(track.track_str_id);
 759                 if str.is_none() { return Err(DemuxerError::InvalidData); }
 760                 let stream = str.unwrap();
 761                 self.src.seek(SeekFrom::Start(offset))?;
 762                 let pkt = self.src.read_packet(stream, pts, false, size)?;
 763                 return Ok(pkt);
 764             }
 765         }
 766         return Err(DemuxerError::EOF);
 767     }
 768
 769     fn seek(&mut self, time: u64, seek_index: &SeekIndex) -> DemuxerResult<()> {
 770         let ret = seek_index.find_pos(time);
 771         if ret.is_none() {
 772             return Err(DemuxerError::SeekError);
 773         }
 774         let seek_info = ret.unwrap();
 775         for track in self.tracks.iter_mut() {
 776             track.seek(seek_info.pts);
 777         }
 778         Ok(())
 779     }
 780 }
 781
 782 impl<'a> MOVDemuxer<'a> {
 783     fn new(io: &'a mut ByteReader<'a>) -> Self {
 784         MOVDemuxer {
 785             src:            io,
 786             depth:          0,
 787             mdat_pos:       0,
 788             mdat_size:      0,
 789             tracks:         Vec::with_capacity(2),
 790             cur_track:      0,
 791             tb_den:         0,
 792             duration:       0,
 793         }
 794     }
 795     fn read_root(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<()> {
 796         self.depth = 0;
 797         while self.src.left() != 0 {
 798             let ret = read_chunk_header(&mut self.src);
 799             if ret.is_err() { break; }
 800             let (ctype, size) = ret.unwrap();
 801             if IGNORED_CHUNKS.contains(&ctype) {
 802                 self.src.skip64(size)?;
 803                 continue;
 804             }
 805             let handler = ROOT_CHUNK_HANDLERS.iter().find(|x| x.ctype == ctype);
 806             let read_size;
 807             if let Some(ref handler) = handler {
 808                 read_size = (handler.parse)(self, strmgr, size)?;
 809             } else {
 810                 println!("skipping unknown chunk {:08X} size {}", ctype, size);
 811                 read_size = 0;
 812             }
 813             validate!(read_size <= size);
 814             self.src.skip64(size - read_size)?;
 815         }
 816 //todo check if all needed chunks are found
 817         Ok(())
 818     }
 819     read_chunk_list!(root; "moov", read_moov, MOOV_CHUNK_HANDLERS);
 820 }
 821
 822 pub struct MOVDemuxerCreator { }
 823
 824 impl DemuxerCreator for MOVDemuxerCreator {
 825     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 826         Box::new(MOVDemuxer::new(br))
 827     }
 828     fn get_name(&self) -> &'static str { "mov" }
 829 }
 830
 831 #[cfg(test)]
 832 mod test {
 833     use super::*;
 834     use std::fs::File;
 835
 836     #[test]
 837     fn test_mov_demux() {
 838         let mut file = File::open("assets/Indeo/cubes.mov").unwrap();
 839         let mut fr = FileReader::new_read(&mut file);
 840         let mut br = ByteReader::new(&mut fr);
 841         let mut dmx = MOVDemuxer::new(&mut br);
 842         let mut sm = StreamManager::new();
 843         let mut si = SeekIndex::new();
 844         dmx.open(&mut sm, &mut si).unwrap();
 845
 846         loop {
 847             let pktres = dmx.get_frame(&mut sm);
 848             if let Err(e) = pktres {
 849                 if e == DemuxerError::EOF { break; }
 850                 panic!("error");
 851             }
 852             let pkt = pktres.unwrap();
 853             println!("Got {}", pkt);
 854         }
 855     }
 856 }