src/codecs/h263/rv20.rs

   1 use crate::io::bitreader::*;
   2 use crate::io::codebook::*;
   3 use crate::formats;
   4 use super::super::*;
   5 use super::*;
   6 use super::code::H263BlockDSP;
   7 use super::decoder::*;
   8 use super::data::*;
   9
  10 #[allow(dead_code)]
  11 struct Tables {
  12     intra_mcbpc_cb: Codebook<u8>,
  13     inter_mcbpc_cb: Codebook<u8>,
  14     mbtype_b_cb:    Codebook<u8>,
  15     cbpy_cb:        Codebook<u8>,
  16     cbpc_b_cb:      Codebook<u8>,
  17     rl_cb:          Codebook<H263RLSym>,
  18     aic_rl_cb:      Codebook<H263RLSym>,
  19     mv_cb:          Codebook<u8>,
  20 }
  21
  22 #[derive(Clone,Copy)]
  23 struct RPRInfo {
  24     present:    bool,
  25     bits:       u8,
  26     widths:     [usize; 8],
  27     heights:    [usize; 8],
  28 }
  29
  30 struct RealVideo20Decoder {
  31     info:       Rc<NACodecInfo>,
  32     dec:        H263BaseDecoder,
  33     tables:     Tables,
  34     w:          usize,
  35     h:          usize,
  36     minor_ver:  u8,
  37     rpr:        RPRInfo,
  38     bdsp:       H263BlockDSP,
  39 }
  40
  41 struct RealVideo20BR<'a> {
  42     br:         BitReader<'a>,
  43     tables:     &'a Tables,
  44     num_slices: usize,
  45     slice_no:   usize,
  46     slice_off:  Vec<u32>,
  47     w:          usize,
  48     h:          usize,
  49     mb_w:       usize,
  50     mb_h:       usize,
  51     mb_pos_bits: u8,
  52     minor_ver:  u8,
  53     rpr:        RPRInfo,
  54 }
  55
  56 struct RV20SliceInfo {
  57     ftype:  Type,
  58     seq:    u32,
  59     qscale: u8,
  60     mb_x:   usize,
  61     mb_y:   usize,
  62     mb_pos: usize,
  63     w:      usize,
  64     h:      usize,
  65 }
  66
  67 impl RV20SliceInfo {
  68     fn new(ftype: Type, seq: u32, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self {
  69         RV20SliceInfo { ftype: ftype, seq: seq, qscale: qscale, mb_x: mb_x, mb_y: mb_y, mb_pos: mb_pos, w: w, h: h }
  70     }
  71 }
  72
  73 impl<'a> RealVideo20BR<'a> {
  74     fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self {
  75         let nslices = (src[0] as usize) + 1;
  76         let mut slice_offs = Vec::with_capacity(nslices);
  77         {
  78             let offs = &src[1..][..nslices * 8];
  79             let mut br = BitReader::new(offs, offs.len(), BitReaderMode::BE);
  80             for _ in 0..nslices {
  81                 br.skip(32).unwrap();
  82                 let off = br.read(32).unwrap();
  83                 slice_offs.push(off);
  84             }
  85         }
  86         let soff = nslices * 8 + 1;
  87         let mb_w = (width  + 15) >> 4;
  88         let mb_h = (height + 15) >> 4;
  89         let max_pos = mb_w * mb_h - 1;
  90         let mut mbpb = 0;
  91         for i in 0..H263_MBB.len() {
  92             if max_pos <= H263_MBB[i].blocks {
  93                 mbpb = H263_MBB[i].bits;
  94                 break;
  95             }
  96         }
  97         RealVideo20BR {
  98             br:         BitReader::new(&src[soff..], src.len() - soff, BitReaderMode::BE),
  99             tables:     tables,
 100             num_slices: nslices,
 101             slice_no:   0,
 102             slice_off:  slice_offs,
 103             w:          width,
 104             h:          height,
 105             mb_w:       mb_w,
 106             mb_h:       mb_h,
 107             mb_pos_bits: mbpb,
 108             minor_ver:  minor_ver,
 109             rpr:        rpr,
 110         }
 111     }
 112
 113 #[allow(unused_variables)]
 114     fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize, acpred: ACPredMode) -> DecoderResult<()> {
 115         let br = &mut self.br;
 116         let mut idx = 0;
 117         if !sstate.is_iframe && intra {
 118             let mut dc = br.read(8)? as i16;
 119             if dc == 255 { dc = 128; }
 120             blk[0] = dc << 3;
 121             idx = 1;
 122         }
 123         if !coded { return Ok(()); }
 124         let scan = match acpred {
 125                     ACPredMode::Hor => H263_SCAN_V,
 126                     ACPredMode::Ver => H263_SCAN_H,
 127                     _               => H263_ZIGZAG,
 128                 };
 129
 130         let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
 131         let q_add = if quant == 0 || sstate.is_iframe { 0i16 } else { ((quant - 1) | 1) as i16 };
 132         let q = if plane_no == 0 { (quant * 2) as i16 } else { H263_CHROMA_QUANT[quant as usize] as i16 };
 133         while idx < 64 {
 134             let code = br.read_cb(rl_cb)?;
 135             let run;
 136             let mut level;
 137             let last;
 138             if !code.is_escape() {
 139                 run   = code.get_run();
 140                 level = code.get_level();
 141                 last  = code.is_last();
 142                 if br.read_bool()? { level = -level; }
 143                 level = (level * q) + q_add;
 144             } else {
 145                 last  = br.read_bool()?;
 146                 run   = br.read(6)? as u8;
 147                 level = br.read_s(8)? as i16;
 148                 if level == -128 {
 149                     let low = br.read(5)? as i16;
 150                     let top = br.read_s(6)? as i16;
 151                     level = (top << 5) | low;
 152                 }
 153                 level = (level * q) + q_add;
 154                 if level < -2048 { level = -2048; }
 155                 if level >  2047 { level =  2047; }
 156             }
 157             idx += run;
 158             validate!(idx < 64);
 159             let oidx = scan[idx as usize];
 160             blk[oidx] = level;
 161             idx += 1;
 162             if last { break; }
 163         }
 164         Ok(())
 165     }
 166 }
 167
 168 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
 169     let code = br.read_cb(mv_cb)? as i16;
 170     if code == 0 { return Ok(0) }
 171     if !br.read_bool()? {
 172         Ok(code)
 173     } else {
 174         Ok(-code)
 175     }
 176 }
 177
 178 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
 179     let xval = decode_mv_component(br, mv_cb)?;
 180     let yval = decode_mv_component(br, mv_cb)?;
 181     Ok(MV::new(xval, yval))
 182 }
 183
 184 fn read_dquant(br: &mut BitReader, q: u8) -> DecoderResult<u8> {
 185     if br.read_bool()? {
 186         Ok(H263_MODIFIED_QUANT[br.read(1)? as usize][q as usize])
 187     } else {
 188         Ok(br.read(5)? as u8)
 189     }
 190 }
 191
 192 impl<'a> BlockDecoder for RealVideo20BR<'a> {
 193
 194 #[allow(unused_variables)]
 195     fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
 196         self.slice_no = 0;
 197         let shdr = self.read_slice_header()?;
 198 //        self.slice_no += 1;
 199         validate!((shdr.mb_x == 0) && (shdr.mb_y == 0));
 200 /*        let mb_count;
 201         if self.slice_no < self.num_slices {
 202             let pos = self.br.tell();
 203             let shdr2 = self.read_slice_header()?;
 204             self.br.seek(pos as u32)?;
 205             mb_count = shdr2.mb_pos - shdr.mb_pos;
 206         } else {
 207             mb_count = self.mb_w * self.mb_h;
 208         }*/
 209
 210         let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false));
 211         let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, MVMode::Long, false, false, shdr.qscale, shdr.seq as u16, None, plusinfo);
 212         Ok(picinfo)
 213     }
 214
 215     #[allow(unused_variables)]
 216     fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
 217         let shdr = self.read_slice_header()?;
 218         self.slice_no += 1;
 219         let mb_count;
 220         if self.slice_no < self.num_slices {
 221             let pos = self.br.tell();
 222             let shdr2 = self.read_slice_header()?;
 223             mb_count = shdr2.mb_pos - shdr.mb_pos;
 224             self.br.seek(pos as u32)?;
 225         } else {
 226             mb_count = self.mb_w * self.mb_h - shdr.mb_pos;
 227         }
 228         let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale);
 229
 230         Ok(ret)
 231     }
 232
 233     fn decode_block_header(&mut self, info: &PicInfo, _slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
 234         let br = &mut self.br;
 235         let mut q = sstate.quant;
 236         match info.get_mode() {
 237             Type::I => {
 238                     let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
 239                     while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
 240                     let mut acpred = ACPredMode::None;
 241                     if let Some(ref pi) = info.plusinfo {
 242                         if pi.aic {
 243                             let acpp = br.read_bool()?;
 244                             acpred = ACPredMode::DC;
 245                             if acpp {
 246                                 acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver };
 247                             }
 248                         }
 249                     }
 250                     let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 251                     let cbp = (cbpy << 2) | (cbpc & 3);
 252                     let dquant = (cbpc & 4) != 0;
 253                     if dquant {
 254                         q = read_dquant(br, q)?;
 255                     }
 256                     let mut binfo = BlockInfo::new(Type::I, cbp, q);
 257                     binfo.set_acpred(acpred);
 258                     Ok(binfo)
 259                 },
 260             Type::P => {
 261                     if br.read_bool()? {
 262                         return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
 263                     }
 264                     let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
 265                     while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
 266                     let is_intra = (cbpc & 0x04) != 0;
 267                     let dquant   = (cbpc & 0x08) != 0;
 268                     let is_4x4   = (cbpc & 0x10) != 0;
 269                     if is_intra {
 270                         let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 271                         let cbp = (cbpy << 2) | (cbpc & 3);
 272                         if dquant {
 273                             q = read_dquant(br, q)?;
 274                         }
 275                         let binfo = BlockInfo::new(Type::I, cbp, q);
 276                         return Ok(binfo);
 277                     }
 278
 279                     let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 280 //                    if /* !aiv && */(cbpc & 3) != 3 {
 281                         cbpy ^= 0xF;
 282 //                    }
 283                     let cbp = (cbpy << 2) | (cbpc & 3);
 284                     if dquant {
 285                         q = read_dquant(br, q)?;
 286                     }
 287                     let mut binfo = BlockInfo::new(Type::P, cbp, q);
 288                     if !is_4x4 {
 289                         let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
 290                         binfo.set_mv(&mvec);
 291                     } else {
 292                         let mvec: [MV; 4] = [
 293                                 decode_mv(br, &self.tables.mv_cb)?,
 294                                 decode_mv(br, &self.tables.mv_cb)?,
 295                                 decode_mv(br, &self.tables.mv_cb)?,
 296                                 decode_mv(br, &self.tables.mv_cb)?
 297                             ];
 298                         binfo.set_mv(&mvec);
 299                     }
 300                     Ok(binfo)
 301                 },
 302             Type::B => { // B
 303                     let mut mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize;
 304                     while mbtype == 14 { mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; }
 305
 306                     let is_coded  = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_CODED) != 0;
 307                     let is_intra  = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_INTRA) != 0;
 308                     let dquant    = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_DQUANT) != 0;
 309                     let is_fwd    = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_FORWARD) != 0;
 310                     let is_bwd    = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_BACKWARD) != 0;
 311
 312                     let cbp = if is_coded {
 313                             let cbpc = br.read_cb(&self.tables.cbpc_b_cb)?;
 314                             let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 315                             if !is_intra { cbpy ^= 0xF; }
 316                             (cbpy << 2) | (cbpc & 3)
 317                         } else { 0 };
 318
 319                     if dquant {
 320                         q = read_dquant(br, q)?;
 321                     }
 322
 323                     if is_intra {
 324                         let binfo = BlockInfo::new(Type::I, cbp, q);
 325                         return Ok(binfo);
 326                     }
 327
 328                     let mut binfo = BlockInfo::new(Type::B, cbp, q);
 329                     if is_fwd {
 330                         let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
 331                         binfo.set_mv(&mvec);
 332                     }
 333                     if is_bwd {
 334                         let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
 335                         binfo.set_b_mv(&mvec);
 336                     }
 337                     Ok(binfo)
 338                 },
 339             _ => { unreachable!(); },
 340         }
 341     }
 342
 343     fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 344         self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred())
 345     }
 346
 347     #[allow(unused_variables)]
 348     fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 349         self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None)
 350     }
 351
 352     fn is_slice_end(&mut self) -> bool { false }
 353 }
 354
 355 impl<'a> RealVideo20BR<'a> {
 356 #[allow(unused_variables)]
 357     fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> {
 358         validate!(self.slice_no < self.num_slices);
 359
 360         let br = &mut self.br;
 361         br.seek(self.slice_off[self.slice_no] * 8)?;
 362
 363         let frm_type    = br.read(2)?;
 364         let ftype = match frm_type {
 365                 0 | 1 => { Type::I },
 366                 2     => { Type::P },
 367                 _     => { Type::B },
 368             };
 369
 370         let marker      = br.read(1)?;
 371         validate!(marker == 0);
 372         let qscale      = br.read(5)? as u8;
 373         validate!(qscale > 0);
 374         if self.minor_ver >= 2 {
 375             br.skip(1)?; // loop filter
 376         }
 377         let seq = if self.minor_ver <= 1 {
 378                 br.read(8)?  << 8
 379             } else {
 380                 br.read(13)? << 3
 381             };
 382         let w;
 383         let h;
 384         if self.rpr.present {
 385             let rpr = br.read(self.rpr.bits)? as usize;
 386             if rpr == 0 {
 387                 w = self.w;
 388                 h = self.h;
 389             } else {
 390                 w = self.rpr.widths[rpr - 1];
 391                 h = self.rpr.heights[rpr - 1];
 392                 validate!((w != 0) && (h != 0));
 393             }
 394         } else {
 395             w = self.w;
 396             h = self.h;
 397         }
 398
 399         let mb_pos = br.read(self.mb_pos_bits)? as usize;
 400         let mb_x = mb_pos % self.mb_w;
 401         let mb_y = mb_pos / self.mb_w;
 402
 403         br.skip(1)?; // no rounding
 404
 405         if (self.minor_ver <= 1) && (frm_type == 3) {
 406             br.skip(5)?;
 407         }
 408
 409         Ok(RV20SliceInfo::new(ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h))
 410     }
 411 }
 412
 413 impl RealVideo20Decoder {
 414     fn new() -> Self {
 415         let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
 416         let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 417         let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
 418         let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 419         let mut coderead = H263ShortCodeReader::new(H263_MBTYPE_B);
 420         let mbtype_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 421         let mut coderead = H263ShortCodeReader::new(H263_CBPY);
 422         let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 423         let mut coderead = H263ShortCodeReader::new(H263_CBPC_B);
 424         let cbpc_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 425         let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
 426         let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 427         let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
 428         let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 429         let mut coderead = H263ShortCodeReader::new(H263_MV);
 430         let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 431
 432         let tables = Tables {
 433             intra_mcbpc_cb: intra_mcbpc_cb,
 434             inter_mcbpc_cb: inter_mcbpc_cb,
 435             mbtype_b_cb:    mbtype_b_cb,
 436             cbpy_cb:        cbpy_cb,
 437             cbpc_b_cb:      cbpc_b_cb,
 438             rl_cb:          rl_cb,
 439             aic_rl_cb:      aic_rl_cb,
 440             mv_cb:          mv_cb,
 441         };
 442
 443         RealVideo20Decoder{
 444             info:           Rc::new(DUMMY_CODEC_INFO),
 445             dec:            H263BaseDecoder::new_b_frames(false),
 446             tables:         tables,
 447             w:              0,
 448             h:              0,
 449             minor_ver:      0,
 450             rpr:            RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
 451             bdsp:           H263BlockDSP::new(),
 452         }
 453     }
 454 }
 455
 456 impl NADecoder for RealVideo20Decoder {
 457 #[allow(unused_variables)]
 458     fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
 459         if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
 460             let w = vinfo.get_width();
 461             let h = vinfo.get_height();
 462             let fmt = formats::YUV420_FORMAT;
 463             let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
 464             self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
 465             self.w = w;
 466             self.h = h;
 467
 468             let edata = info.get_extradata().unwrap();
 469             let src: &[u8] = &edata;
 470             let ver = ((src[4] as u32) << 12) | ((src[5] as u32) << 4) | ((src[6] as u32) >> 4);
 471             let maj_ver = ver >> 16;
 472             let min_ver = (ver >> 8) & 0xFF;
 473             let mic_ver = ver & 0xFF;
 474             validate!(maj_ver == 2);
 475             self.minor_ver = min_ver as u8;
 476             let rprb = src[1] & 7;
 477             if rprb == 0 {
 478                 self.rpr.present = false;
 479             } else {
 480                 self.rpr.present = true;
 481                 self.rpr.bits    = ((rprb >> 1) + 1) as u8;
 482                 for i in 4..(src.len()/2) {
 483                     self.rpr.widths [i - 4] = (src[i * 2]     as usize) * 4;
 484                     self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4;
 485                 }
 486             }
 487             Ok(())
 488         } else {
 489             Err(DecoderError::InvalidData)
 490         }
 491     }
 492     fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 493         let src = pkt.get_buffer();
 494
 495         let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr);
 496
 497         let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
 498
 499         let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
 500         frm.set_keyframe(self.dec.is_intra());
 501         frm.set_frame_type(self.dec.get_frame_type());
 502         Ok(Rc::new(RefCell::new(frm)))
 503     }
 504 }
 505
 506 struct MBB { blocks: usize, bits: u8 }
 507 const H263_MBB: &[MBB; 7] = &[
 508     MBB{ blocks:    47, bits:  6 },
 509     MBB{ blocks:    98, bits:  7 },
 510     MBB{ blocks:   395, bits:  9 },
 511     MBB{ blocks:  1583, bits: 11 },
 512     MBB{ blocks:  6335, bits: 13 },
 513     MBB{ blocks:  9215, bits: 14 },
 514     MBB{ blocks: 65536, bits: 14 },
 515 ];
 516
 517 pub fn get_decoder() -> Box<NADecoder> {
 518     Box::new(RealVideo20Decoder::new())
 519 }
 520
 521 #[cfg(test)]
 522 mod test {
 523     use crate::test::dec_video::test_file_decoding;
 524     #[test]
 525     fn test_rv20() {
 526         test_file_decoding("realmedia", "assets/RV/rv20_svt_atrc_640x352_realproducer_plus_8.51.rm", /*None*/Some(3000), true, false, None/*Some("rv20")*/);
 527 //        test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(1000), true, false, Some("rv20"));
 528     }
 529 }