nihav-indeo/src/codecs/intel263.rs

   1 use std::rc::Rc;
   2 use std::cell::RefCell;
   3 use nihav_core::io::bitreader::*;
   4 use nihav_core::io::codebook::*;
   5 use nihav_core::formats;
   6 use nihav_core::frame::*;
   7 use nihav_core::codecs::*;
   8 use nihav_core::codecs::h263::*;
   9 use nihav_core::codecs::h263::decoder::*;
  10 use nihav_core::codecs::h263::data::*;
  11 use nihav_core::codecs::h263::code::H263BlockDSP;
  12
  13 #[allow(dead_code)]
  14 struct Tables {
  15     intra_mcbpc_cb: Codebook<u8>,
  16     inter_mcbpc_cb: Codebook<u8>,
  17     cbpy_cb:        Codebook<u8>,
  18     rl_cb:          Codebook<H263RLSym>,
  19     aic_rl_cb:      Codebook<H263RLSym>,
  20     mv_cb:          Codebook<u8>,
  21 }
  22
  23 struct Intel263Decoder {
  24     info:    Rc<NACodecInfo>,
  25     dec:     H263BaseDecoder,
  26     tables:  Tables,
  27     bdsp:    H263BlockDSP,
  28 }
  29
  30 struct Intel263BR<'a> {
  31     br:     BitReader<'a>,
  32     tables: &'a Tables,
  33     gob_no: usize,
  34     mb_w:   usize,
  35     is_pb:  bool,
  36     is_ipb: bool,
  37 }
  38
  39 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
  40     let mark = br.read(1)?;
  41     validate!(mark == 1);
  42     Ok(())
  43 }
  44
  45 impl<'a> Intel263BR<'a> {
  46     fn new(src: &'a [u8], tables: &'a Tables) -> Self {
  47         Intel263BR {
  48             br:     BitReader::new(src, src.len(), BitReaderMode::BE),
  49             tables: tables,
  50             gob_no: 0,
  51             mb_w:   0,
  52             is_pb:  false,
  53             is_ipb: false,
  54         }
  55     }
  56
  57     fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
  58         let br = &mut self.br;
  59         let mut idx = 0;
  60         if intra {
  61             let mut dc = br.read(8)?;
  62             if dc == 255 { dc = 128; }
  63             blk[0] = (dc as i16) << 3;
  64             idx = 1;
  65         }
  66         if !coded { return Ok(()); }
  67
  68         let rl_cb = &self.tables.rl_cb; // could be aic too
  69         let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 };
  70         let q = (quant * 2) as i16;
  71         while idx < 64 {
  72             let code = br.read_cb(rl_cb)?;
  73             let run;
  74             let mut level;
  75             let last;
  76             if !code.is_escape() {
  77                 run   = code.get_run();
  78                 level = code.get_level();
  79                 last  = code.is_last();
  80                 if br.read_bool()? { level = -level; }
  81                 level = (level * q) + q_add;
  82             } else {
  83                 last  = br.read_bool()?;
  84                 run   = br.read(6)? as u8;
  85                 level = br.read_s(8)? as i16;
  86                 if level == -128 {
  87                     let low = br.read(5)? as i16;
  88                     let top = br.read_s(6)? as i16;
  89                     level = (top << 5) | low;
  90                 }
  91                 level = (level * q) + q_add;
  92                 if level < -2048 { level = -2048; }
  93                 if level >  2047 { level =  2047; }
  94             }
  95             idx += run;
  96             validate!(idx < 64);
  97             let oidx = H263_ZIGZAG[idx as usize];
  98             blk[oidx] = level;
  99             idx += 1;
 100             if last { break; }
 101         }
 102         Ok(())
 103     }
 104 }
 105
 106 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
 107     let code = br.read_cb(mv_cb)? as i16;
 108     if code == 0 { return Ok(0) }
 109     if !br.read_bool()? {
 110         Ok(code)
 111     } else {
 112         Ok(-code)
 113     }
 114 }
 115
 116 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
 117     let xval = decode_mv_component(br, mv_cb)?;
 118     let yval = decode_mv_component(br, mv_cb)?;
 119     Ok(MV::new(xval, yval))
 120 }
 121
 122 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
 123     if is_pb { // as improved pb
 124         if is_ipb {
 125             let pb_mv_add = if is_intra { 1 } else { 0 };
 126             if br.read_bool()?{
 127                 if br.read_bool()? {
 128                     let pb_mv_count = 1 - (br.read(1)? as usize);
 129                     let cbpb = br.read(6)? as u8;
 130                     Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
 131                 } else {
 132                     Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
 133                 }
 134             } else {
 135                 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
 136             }
 137         } else {
 138             let mvdb = br.read_bool()?;
 139             let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
 140             Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
 141         }
 142     } else {
 143         Ok(BBlockInfo::new(false, 0, 0, false))
 144     }
 145 }
 146
 147 impl<'a> BlockDecoder for Intel263BR<'a> {
 148
 149 #[allow(unused_variables)]
 150     fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
 151         let br = &mut self.br;
 152         let syncw = br.read(22)?;
 153         validate!(syncw == 0x000020);
 154         let tr = (br.read(8)? << 8) as u16;
 155         check_marker(br)?;
 156         let id = br.read(1)?;
 157         validate!(id == 0);
 158         br.read(1)?; // split screen indicator
 159         br.read(1)?; // document camera indicator
 160         br.read(1)?; // freeze picture release
 161         let mut sfmt = br.read(3)?;
 162         validate!((sfmt != 0b000) && (sfmt != 0b110));
 163         let is_intra = !br.read_bool()?;
 164         let umv = br.read_bool()?;
 165         br.read(1)?; // syntax arithmetic coding
 166         let apm = br.read_bool()?;
 167         self.is_pb = br.read_bool()?;
 168         let deblock;
 169         let pbplus;
 170         if sfmt == 0b111 {
 171             sfmt = br.read(3)?;
 172             validate!((sfmt != 0b000) && (sfmt != 0b111));
 173             br.read(2)?; // unknown flags
 174             deblock = br.read_bool()?;
 175             br.read(1)?; // unknown flag
 176             pbplus = br.read_bool()?;
 177             br.read(5)?; // unknown flags
 178             let marker = br.read(5)?;
 179             validate!(marker == 1);
 180         } else {
 181             deblock = false;
 182             pbplus = false;
 183         }
 184         self.is_ipb = pbplus;
 185         let w; let h;
 186         if sfmt == 0b110 {
 187             let par = br.read(4)?;
 188             w = ((br.read(9)? + 1) * 4) as usize;
 189             check_marker(br)?;
 190             h = ((br.read(9)? + 1) * 4) as usize;
 191             if par == 0b1111 {
 192                 let pixw = br.read(8)?;
 193                 let pixh = br.read(8)?;
 194                 validate!((pixw != 0) && (pixh != 0));
 195             }
 196         } else {
 197             let (w_, h_) = H263_SIZES[sfmt as usize];
 198             w = w_;
 199             h = h_;
 200         }
 201         let quant = br.read(5)?;
 202         let cpm = br.read_bool()?;
 203         validate!(!cpm);
 204
 205         let pbinfo;
 206         if self.is_pb {
 207             let trb = br.read(3)?;
 208             let dbquant = br.read(2)?;
 209             pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
 210         } else {
 211             pbinfo = None;
 212         }
 213         while br.read_bool()? { // skip PEI
 214             br.read(8)?;
 215         }
 216 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
 217         self.gob_no = 0;
 218         self.mb_w = (w + 15) >> 4;
 219
 220         let ftype = if is_intra { Type::I } else { Type::P };
 221         let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
 222         let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
 223         let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
 224         Ok(picinfo)
 225     }
 226
 227     #[allow(unused_variables)]
 228     fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
 229         let br = &mut self.br;
 230         let gbsc = br.read(17)?;
 231         validate!(gbsc == 1);
 232         let gn = br.read(5)?;
 233         let gfid = br.read(2)?;
 234         let gquant = br.read(5)?;
 235 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
 236         let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
 237         self.gob_no += 1;
 238         Ok(ret)
 239     }
 240
 241     #[allow(unused_variables)]
 242     fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
 243         let br = &mut self.br;
 244         let mut q = slice.get_quant();
 245         match info.get_mode() {
 246             Type::I => {
 247                     let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
 248                     while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
 249                     let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 250                     let cbp = (cbpy << 2) | (cbpc & 3);
 251                     let dquant = (cbpc & 4) != 0;
 252                     if dquant {
 253                         let idx = br.read(2)? as usize;
 254                         q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
 255                     }
 256                     Ok(BlockInfo::new(Type::I, cbp, q))
 257                 },
 258             Type::P => {
 259                     if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
 260                     let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
 261                     while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
 262                     let is_intra = (cbpc & 0x04) != 0;
 263                     let dquant   = (cbpc & 0x08) != 0;
 264                     let is_4x4   = (cbpc & 0x10) != 0;
 265                     if is_intra {
 266                         let mut mvec: Vec<MV> = Vec::new();
 267                         let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
 268                         let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 269                         let cbp = (cbpy << 2) | (cbpc & 3);
 270                         if dquant {
 271                             let idx = br.read(2)? as usize;
 272                             q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
 273                         }
 274                         let mut binfo = BlockInfo::new(Type::I, cbp, q);
 275                         binfo.set_bpart(bbinfo);
 276                         if self.is_pb {
 277                             for _ in 0..bbinfo.get_num_mv() {
 278                                 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
 279                             }
 280                             binfo.set_b_mv(mvec.as_slice());
 281                         }
 282                         return Ok(binfo);
 283                     }
 284
 285                     let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
 286                     let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 287 //                    if /* !aiv && */(cbpc & 3) != 3 {
 288                         cbpy ^= 0xF;
 289 //                    }
 290                     let cbp = (cbpy << 2) | (cbpc & 3);
 291                     if dquant {
 292                         let idx = br.read(2)? as usize;
 293                         q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
 294                     }
 295                     let mut binfo = BlockInfo::new(Type::P, cbp, q);
 296                     binfo.set_bpart(bbinfo);
 297                     if !is_4x4 {
 298                         let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
 299                         binfo.set_mv(&mvec);
 300                     } else {
 301                         let mvec: [MV; 4] = [
 302                                 decode_mv(br, &self.tables.mv_cb)?,
 303                                 decode_mv(br, &self.tables.mv_cb)?,
 304                                 decode_mv(br, &self.tables.mv_cb)?,
 305                                 decode_mv(br, &self.tables.mv_cb)?
 306                             ];
 307                         binfo.set_mv(&mvec);
 308                     }
 309                     if self.is_pb {
 310                         let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
 311                         for _ in 0..bbinfo.get_num_mv() {
 312                             let mv = decode_mv(br, &self.tables.mv_cb)?;
 313                             mvec.push(mv);
 314                         }
 315                         binfo.set_b_mv(mvec.as_slice());
 316                     }
 317                     Ok(binfo)
 318                 },
 319             _ => { Err(DecoderError::InvalidData) },
 320         }
 321     }
 322
 323     #[allow(unused_variables)]
 324     fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 325         self.decode_block(quant, true, coded, blk)
 326     }
 327
 328     #[allow(unused_variables)]
 329     fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 330         self.decode_block(quant, false, coded, blk)
 331     }
 332
 333     fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
 334 }
 335
 336 impl Intel263Decoder {
 337     fn new() -> Self {
 338         let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
 339         let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 340         let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
 341         let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 342         let mut coderead = H263ShortCodeReader::new(H263_CBPY);
 343         let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 344         let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
 345         let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 346         let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
 347         let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 348         let mut coderead = H263ShortCodeReader::new(H263_MV);
 349         let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 350         let tables = Tables {
 351             intra_mcbpc_cb: intra_mcbpc_cb,
 352             inter_mcbpc_cb: inter_mcbpc_cb,
 353             cbpy_cb:        cbpy_cb,
 354             rl_cb:          rl_cb,
 355             aic_rl_cb:      aic_rl_cb,
 356             mv_cb:          mv_cb,
 357         };
 358
 359         Intel263Decoder{
 360             info:           Rc::new(DUMMY_CODEC_INFO),
 361             dec:            H263BaseDecoder::new(true),
 362             tables:         tables,
 363             bdsp:           H263BlockDSP::new(),
 364         }
 365     }
 366 }
 367
 368 impl NADecoder for Intel263Decoder {
 369     fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
 370         if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
 371             let w = vinfo.get_width();
 372             let h = vinfo.get_height();
 373             let fmt = formats::YUV420_FORMAT;
 374             let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
 375             self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
 376             Ok(())
 377         } else {
 378             Err(DecoderError::InvalidData)
 379         }
 380     }
 381     fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 382         let src = pkt.get_buffer();
 383
 384         if src.len() == 8 {
 385             let bret = self.dec.get_bframe(&self.bdsp);
 386             let buftype;
 387             let is_skip;
 388             if let Ok(btype) = bret {
 389                 buftype = btype;
 390                 is_skip = false;
 391             } else {
 392                 buftype = NABufferType::None;
 393                 is_skip = true;
 394             }
 395             let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
 396             frm.set_keyframe(false);
 397             frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
 398             return Ok(Rc::new(RefCell::new(frm)));
 399         }
 400         let mut ibr = Intel263BR::new(&src, &self.tables);
 401
 402         let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
 403
 404         let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
 405         frm.set_keyframe(self.dec.is_intra());
 406         frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
 407         Ok(Rc::new(RefCell::new(frm)))
 408     }
 409 }
 410
 411
 412 pub fn get_decoder() -> Box<NADecoder> {
 413     Box::new(Intel263Decoder::new())
 414 }
 415
 416 #[cfg(test)]
 417 mod test {
 418     use nihav_core::codecs::RegisteredDecoders;
 419     use nihav_core::demuxers::RegisteredDemuxers;
 420     use nihav_core::test::dec_video::*;
 421     use crate::codecs::indeo_register_all_codecs;
 422     use nihav_commonfmt::demuxers::generic_register_all_demuxers;
 423     #[test]
 424     fn test_intel263() {
 425         let mut dmx_reg = RegisteredDemuxers::new();
 426         generic_register_all_demuxers(&mut dmx_reg);
 427         let mut dec_reg = RegisteredDecoders::new();
 428         indeo_register_all_codecs(&mut dec_reg);
 429
 430         test_file_decoding("avi", "assets/Indeo/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/, &dmx_reg, &dec_reg);
 431     }
 432 }