nihav-indeo/src/codecs/intel263.rs

   1 use nihav_core::io::bitreader::*;
   2 use nihav_core::io::codebook::*;
   3 use nihav_core::formats;
   4 use nihav_core::frame::*;
   5 use nihav_core::codecs::*;
   6 use nihav_core::codecs::h263::*;
   7 use nihav_core::codecs::h263::decoder::*;
   8 use nihav_core::codecs::h263::data::*;
   9 use nihav_core::codecs::h263::code::H263BlockDSP;
  10
  11 #[allow(dead_code)]
  12 struct Tables {
  13     intra_mcbpc_cb: Codebook<u8>,
  14     inter_mcbpc_cb: Codebook<u8>,
  15     cbpy_cb:        Codebook<u8>,
  16     rl_cb:          Codebook<H263RLSym>,
  17     aic_rl_cb:      Codebook<H263RLSym>,
  18     mv_cb:          Codebook<u8>,
  19 }
  20
  21 struct Intel263Decoder {
  22     info:    NACodecInfoRef,
  23     dec:     H263BaseDecoder,
  24     tables:  Tables,
  25     bdsp:    H263BlockDSP,
  26 }
  27
  28 struct Intel263BR<'a> {
  29     br:     BitReader<'a>,
  30     tables: &'a Tables,
  31     gob_no: usize,
  32     mb_w:   usize,
  33     is_pb:  bool,
  34     is_ipb: bool,
  35 }
  36
  37 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
  38     let mark = br.read(1)?;
  39     validate!(mark == 1);
  40     Ok(())
  41 }
  42
  43 impl<'a> Intel263BR<'a> {
  44     fn new(src: &'a [u8], tables: &'a Tables) -> Self {
  45         Intel263BR {
  46             br:     BitReader::new(src, src.len(), BitReaderMode::BE),
  47             tables: tables,
  48             gob_no: 0,
  49             mb_w:   0,
  50             is_pb:  false,
  51             is_ipb: false,
  52         }
  53     }
  54
  55     fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
  56         let br = &mut self.br;
  57         let mut idx = 0;
  58         if intra {
  59             let mut dc = br.read(8)?;
  60             if dc == 255 { dc = 128; }
  61             blk[0] = (dc as i16) << 3;
  62             idx = 1;
  63         }
  64         if !coded { return Ok(()); }
  65
  66         let rl_cb = &self.tables.rl_cb; // could be aic too
  67         let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 };
  68         let q = (quant * 2) as i16;
  69         while idx < 64 {
  70             let code = br.read_cb(rl_cb)?;
  71             let run;
  72             let mut level;
  73             let last;
  74             if !code.is_escape() {
  75                 run   = code.get_run();
  76                 level = code.get_level();
  77                 last  = code.is_last();
  78                 if br.read_bool()? { level = -level; }
  79                 level = (level * q) + q_add;
  80             } else {
  81                 last  = br.read_bool()?;
  82                 run   = br.read(6)? as u8;
  83                 level = br.read_s(8)? as i16;
  84                 if level == -128 {
  85                     let low = br.read(5)? as i16;
  86                     let top = br.read_s(6)? as i16;
  87                     level = (top << 5) | low;
  88                 }
  89                 level = (level * q) + q_add;
  90                 if level < -2048 { level = -2048; }
  91                 if level >  2047 { level =  2047; }
  92             }
  93             idx += run;
  94             validate!(idx < 64);
  95             let oidx = H263_ZIGZAG[idx as usize];
  96             blk[oidx] = level;
  97             idx += 1;
  98             if last { break; }
  99         }
 100         Ok(())
 101     }
 102 }
 103
 104 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
 105     let code = br.read_cb(mv_cb)? as i16;
 106     if code == 0 { return Ok(0) }
 107     if !br.read_bool()? {
 108         Ok(code)
 109     } else {
 110         Ok(-code)
 111     }
 112 }
 113
 114 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
 115     let xval = decode_mv_component(br, mv_cb)?;
 116     let yval = decode_mv_component(br, mv_cb)?;
 117     Ok(MV::new(xval, yval))
 118 }
 119
 120 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
 121     if is_pb { // as improved pb
 122         if is_ipb {
 123             let pb_mv_add = if is_intra { 1 } else { 0 };
 124             if br.read_bool()?{
 125                 if br.read_bool()? {
 126                     let pb_mv_count = 1 - (br.read(1)? as usize);
 127                     let cbpb = br.read(6)? as u8;
 128                     Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
 129                 } else {
 130                     Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
 131                 }
 132             } else {
 133                 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
 134             }
 135         } else {
 136             let mvdb = br.read_bool()?;
 137             let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
 138             Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
 139         }
 140     } else {
 141         Ok(BBlockInfo::new(false, 0, 0, false))
 142     }
 143 }
 144
 145 impl<'a> BlockDecoder for Intel263BR<'a> {
 146
 147 #[allow(unused_variables)]
 148     fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
 149         let br = &mut self.br;
 150         let syncw = br.read(22)?;
 151         validate!(syncw == 0x000020);
 152         let tr = (br.read(8)? << 8) as u16;
 153         check_marker(br)?;
 154         let id = br.read(1)?;
 155         validate!(id == 0);
 156         br.read(1)?; // split screen indicator
 157         br.read(1)?; // document camera indicator
 158         br.read(1)?; // freeze picture release
 159         let mut sfmt = br.read(3)?;
 160         validate!((sfmt != 0b000) && (sfmt != 0b110));
 161         let is_intra = !br.read_bool()?;
 162         let umv = br.read_bool()?;
 163         br.read(1)?; // syntax arithmetic coding
 164         let apm = br.read_bool()?;
 165         self.is_pb = br.read_bool()?;
 166         let deblock;
 167         let pbplus;
 168         if sfmt == 0b111 {
 169             sfmt = br.read(3)?;
 170             validate!((sfmt != 0b000) && (sfmt != 0b111));
 171             br.read(2)?; // unknown flags
 172             deblock = br.read_bool()?;
 173             br.read(1)?; // unknown flag
 174             pbplus = br.read_bool()?;
 175             br.read(5)?; // unknown flags
 176             let marker = br.read(5)?;
 177             validate!(marker == 1);
 178         } else {
 179             deblock = false;
 180             pbplus = false;
 181         }
 182         self.is_ipb = pbplus;
 183         let w; let h;
 184         if sfmt == 0b110 {
 185             let par = br.read(4)?;
 186             w = ((br.read(9)? + 1) * 4) as usize;
 187             check_marker(br)?;
 188             h = ((br.read(9)? + 1) * 4) as usize;
 189             if par == 0b1111 {
 190                 let pixw = br.read(8)?;
 191                 let pixh = br.read(8)?;
 192                 validate!((pixw != 0) && (pixh != 0));
 193             }
 194         } else {
 195             let (w_, h_) = H263_SIZES[sfmt as usize];
 196             w = w_;
 197             h = h_;
 198         }
 199         let quant = br.read(5)?;
 200         let cpm = br.read_bool()?;
 201         validate!(!cpm);
 202
 203         let pbinfo;
 204         if self.is_pb {
 205             let trb = br.read(3)?;
 206             let dbquant = br.read(2)?;
 207             pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
 208         } else {
 209             pbinfo = None;
 210         }
 211         while br.read_bool()? { // skip PEI
 212             br.read(8)?;
 213         }
 214 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
 215         self.gob_no = 0;
 216         self.mb_w = (w + 15) >> 4;
 217
 218         let ftype = if is_intra { Type::I } else { Type::P };
 219         let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
 220         let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
 221         let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
 222         Ok(picinfo)
 223     }
 224
 225     #[allow(unused_variables)]
 226     fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
 227         let br = &mut self.br;
 228         let gbsc = br.read(17)?;
 229         validate!(gbsc == 1);
 230         let gn = br.read(5)?;
 231         let gfid = br.read(2)?;
 232         let gquant = br.read(5)?;
 233 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
 234         let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
 235         self.gob_no += 1;
 236         Ok(ret)
 237     }
 238
 239     #[allow(unused_variables)]
 240     fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
 241         let br = &mut self.br;
 242         let mut q = slice.get_quant();
 243         match info.get_mode() {
 244             Type::I => {
 245                     let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
 246                     while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
 247                     let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 248                     let cbp = (cbpy << 2) | (cbpc & 3);
 249                     let dquant = (cbpc & 4) != 0;
 250                     if dquant {
 251                         let idx = br.read(2)? as usize;
 252                         q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
 253                     }
 254                     Ok(BlockInfo::new(Type::I, cbp, q))
 255                 },
 256             Type::P => {
 257                     if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
 258                     let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
 259                     while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
 260                     let is_intra = (cbpc & 0x04) != 0;
 261                     let dquant   = (cbpc & 0x08) != 0;
 262                     let is_4x4   = (cbpc & 0x10) != 0;
 263                     if is_intra {
 264                         let mut mvec: Vec<MV> = Vec::new();
 265                         let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
 266                         let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 267                         let cbp = (cbpy << 2) | (cbpc & 3);
 268                         if dquant {
 269                             let idx = br.read(2)? as usize;
 270                             q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
 271                         }
 272                         let mut binfo = BlockInfo::new(Type::I, cbp, q);
 273                         binfo.set_bpart(bbinfo);
 274                         if self.is_pb {
 275                             for _ in 0..bbinfo.get_num_mv() {
 276                                 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
 277                             }
 278                             binfo.set_b_mv(mvec.as_slice());
 279                         }
 280                         return Ok(binfo);
 281                     }
 282
 283                     let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
 284                     let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 285 //                    if /* !aiv && */(cbpc & 3) != 3 {
 286                         cbpy ^= 0xF;
 287 //                    }
 288                     let cbp = (cbpy << 2) | (cbpc & 3);
 289                     if dquant {
 290                         let idx = br.read(2)? as usize;
 291                         q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
 292                     }
 293                     let mut binfo = BlockInfo::new(Type::P, cbp, q);
 294                     binfo.set_bpart(bbinfo);
 295                     if !is_4x4 {
 296                         let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
 297                         binfo.set_mv(&mvec);
 298                     } else {
 299                         let mvec: [MV; 4] = [
 300                                 decode_mv(br, &self.tables.mv_cb)?,
 301                                 decode_mv(br, &self.tables.mv_cb)?,
 302                                 decode_mv(br, &self.tables.mv_cb)?,
 303                                 decode_mv(br, &self.tables.mv_cb)?
 304                             ];
 305                         binfo.set_mv(&mvec);
 306                     }
 307                     if self.is_pb {
 308                         let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
 309                         for _ in 0..bbinfo.get_num_mv() {
 310                             let mv = decode_mv(br, &self.tables.mv_cb)?;
 311                             mvec.push(mv);
 312                         }
 313                         binfo.set_b_mv(mvec.as_slice());
 314                     }
 315                     Ok(binfo)
 316                 },
 317             _ => { Err(DecoderError::InvalidData) },
 318         }
 319     }
 320
 321     #[allow(unused_variables)]
 322     fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 323         self.decode_block(quant, true, coded, blk)
 324     }
 325
 326     #[allow(unused_variables)]
 327     fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 328         self.decode_block(quant, false, coded, blk)
 329     }
 330
 331     fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
 332 }
 333
 334 impl Intel263Decoder {
 335     fn new() -> Self {
 336         let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
 337         let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 338         let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
 339         let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 340         let mut coderead = H263ShortCodeReader::new(H263_CBPY);
 341         let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 342         let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
 343         let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 344         let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
 345         let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 346         let mut coderead = H263ShortCodeReader::new(H263_MV);
 347         let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 348         let tables = Tables {
 349             intra_mcbpc_cb: intra_mcbpc_cb,
 350             inter_mcbpc_cb: inter_mcbpc_cb,
 351             cbpy_cb:        cbpy_cb,
 352             rl_cb:          rl_cb,
 353             aic_rl_cb:      aic_rl_cb,
 354             mv_cb:          mv_cb,
 355         };
 356
 357         Intel263Decoder{
 358             info:           NACodecInfo::new_dummy(),
 359             dec:            H263BaseDecoder::new(true),
 360             tables:         tables,
 361             bdsp:           H263BlockDSP::new(),
 362         }
 363     }
 364 }
 365
 366 impl NADecoder for Intel263Decoder {
 367     fn init(&mut self, info: NACodecInfoRef) -> DecoderResult<()> {
 368         if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
 369             let w = vinfo.get_width();
 370             let h = vinfo.get_height();
 371             let fmt = formats::YUV420_FORMAT;
 372             let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
 373             self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
 374             Ok(())
 375         } else {
 376             Err(DecoderError::InvalidData)
 377         }
 378     }
 379     fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 380         let src = pkt.get_buffer();
 381
 382         if src.len() == 8 {
 383             let bret = self.dec.get_bframe(&self.bdsp);
 384             let buftype;
 385             let is_skip;
 386             if let Ok(btype) = bret {
 387                 buftype = btype;
 388                 is_skip = false;
 389             } else {
 390                 buftype = NABufferType::None;
 391                 is_skip = true;
 392             }
 393             let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
 394             frm.set_keyframe(false);
 395             frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
 396             return Ok(Rc::new(RefCell::new(frm)));
 397         }
 398         let mut ibr = Intel263BR::new(&src, &self.tables);
 399
 400         let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
 401
 402         let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
 403         frm.set_keyframe(self.dec.is_intra());
 404         frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
 405         Ok(Rc::new(RefCell::new(frm)))
 406     }
 407 }
 408
 409
 410 pub fn get_decoder() -> Box<NADecoder> {
 411     Box::new(Intel263Decoder::new())
 412 }
 413
 414 #[cfg(test)]
 415 mod test {
 416     use nihav_core::codecs::RegisteredDecoders;
 417     use nihav_core::demuxers::RegisteredDemuxers;
 418     use nihav_core::test::dec_video::*;
 419     use crate::codecs::indeo_register_all_codecs;
 420     use nihav_commonfmt::demuxers::generic_register_all_demuxers;
 421     #[test]
 422     fn test_intel263() {
 423         let mut dmx_reg = RegisteredDemuxers::new();
 424         generic_register_all_demuxers(&mut dmx_reg);
 425         let mut dec_reg = RegisteredDecoders::new();
 426         indeo_register_all_codecs(&mut dec_reg);
 427
 428         test_file_decoding("avi", "assets/Indeo/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/, &dmx_reg, &dec_reg);
 429     }
 430 }