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_codec_support::codecs::{MV, ZIGZAG};
   7 use nihav_codec_support::codecs::h263::*;
   8 use nihav_codec_support::codecs::h263::decoder::*;
   9 use nihav_codec_support::codecs::h263::data::*;
  10 use nihav_codec_support::codecs::h263::code::H263BlockDSP;
  11
  12 #[allow(dead_code)]
  13 struct Tables {
  14     intra_mcbpc_cb: Codebook<u8>,
  15     inter_mcbpc_cb: Codebook<u8>,
  16     cbpy_cb:        Codebook<u8>,
  17     rl_cb:          Codebook<H263RLSym>,
  18     aic_rl_cb:      Codebook<H263RLSym>,
  19     mv_cb:          Codebook<u8>,
  20 }
  21
  22 struct Intel263Decoder {
  23     info:    NACodecInfoRef,
  24     dec:     H263BaseDecoder,
  25     tables:  Tables,
  26     bdsp:    H263BlockDSP,
  27     lastframe:  Option<NABufferType>,
  28     lastpts:    Option<u64>,
  29 }
  30
  31 struct Intel263BR<'a> {
  32     br:     BitReader<'a>,
  33     tables: &'a Tables,
  34     gob_no: usize,
  35     mb_w:   usize,
  36     is_pb:  bool,
  37     is_ipb: bool,
  38 }
  39
  40 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
  41     let mark = br.read(1)?;
  42     validate!(mark == 1);
  43     Ok(())
  44 }
  45
  46 impl<'a> Intel263BR<'a> {
  47     fn new(src: &'a [u8], tables: &'a Tables) -> Self {
  48         Intel263BR {
  49             br:     BitReader::new(src, BitReaderMode::BE),
  50             tables,
  51             gob_no: 0,
  52             mb_w:   0,
  53             is_pb:  false,
  54             is_ipb: false,
  55         }
  56     }
  57
  58     fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
  59         let br = &mut self.br;
  60         let mut idx = 0;
  61         if intra {
  62             let mut dc = br.read(8)?;
  63             if dc == 255 { dc = 128; }
  64             blk[0] = (dc as i16) << 3;
  65             idx = 1;
  66         }
  67         if !coded { return Ok(()); }
  68
  69         let rl_cb = &self.tables.rl_cb; // could be aic too
  70         let q_add = if quant == 0 { 0i16 } else { i16::from((quant - 1) | 1) };
  71         let q = i16::from(quant * 2);
  72         while idx < 64 {
  73             let code = br.read_cb(rl_cb)?;
  74             let run;
  75             let mut level;
  76             let last;
  77             if !code.is_escape() {
  78                 run   = code.get_run();
  79                 level = code.get_level();
  80                 last  = code.is_last();
  81                 if br.read_bool()? { level = -level; }
  82                 level = (level * q) + q_add;
  83             } else {
  84                 last  = br.read_bool()?;
  85                 run   = br.read(6)? as u8;
  86                 level = br.read_s(8)? as i16;
  87                 if level == -128 {
  88                     let low = br.read(5)? as i16;
  89                     let top = br.read_s(6)? as i16;
  90                     level = (top << 5) | low;
  91                 }
  92                 level = (level * q) + q_add;
  93                 if level < -2048 { level = -2048; }
  94                 if level >  2047 { level =  2047; }
  95             }
  96             idx += run;
  97             validate!(idx < 64);
  98             let oidx = ZIGZAG[idx as usize];
  99             blk[oidx] = level;
 100             idx += 1;
 101             if last { break; }
 102         }
 103         Ok(())
 104     }
 105 }
 106
 107 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
 108     let code = i16::from(br.read_cb(mv_cb)?);
 109     if code == 0 { return Ok(0) }
 110     if !br.read_bool()? {
 111         Ok(code)
 112     } else {
 113         Ok(-code)
 114     }
 115 }
 116
 117 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
 118     let xval = decode_mv_component(br, mv_cb)?;
 119     let yval = decode_mv_component(br, mv_cb)?;
 120     Ok(MV::new(xval, yval))
 121 }
 122
 123 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
 124     if is_pb { // as improved pb
 125         if is_ipb {
 126             let pb_mv_add = if is_intra { 1 } else { 0 };
 127             if br.read_bool()?{
 128                 if br.read_bool()? {
 129                     let pb_mv_count = 1 - (br.read(1)? as usize);
 130                     let cbpb = br.read(6)? as u8;
 131                     Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
 132                 } else {
 133                     Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
 134                 }
 135             } else {
 136                 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
 137             }
 138         } else {
 139             let mvdb = br.read_bool()?;
 140             let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
 141             Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
 142         }
 143     } else {
 144         Ok(BBlockInfo::new(false, 0, 0, false))
 145     }
 146 }
 147
 148 impl<'a> BlockDecoder for Intel263BR<'a> {
 149
 150 #[allow(unused_variables)]
 151     fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
 152         let br = &mut self.br;
 153         let syncw = br.read(22)?;
 154         validate!(syncw == 0x000020);
 155         let tr = (br.read(8)? << 8) as u16;
 156         check_marker(br)?;
 157         let id = br.read(1)?;
 158         validate!(id == 0);
 159         br.read(1)?; // split screen indicator
 160         br.read(1)?; // document camera indicator
 161         br.read(1)?; // freeze picture release
 162         let mut sfmt = br.read(3)?;
 163         validate!((sfmt != 0b000) && (sfmt != 0b110));
 164         let is_intra = !br.read_bool()?;
 165         let umv = br.read_bool()?;
 166         br.read(1)?; // syntax arithmetic coding
 167         let apm = br.read_bool()?;
 168         self.is_pb = br.read_bool()?;
 169         let deblock;
 170         let pbplus;
 171         if sfmt == 0b111 {
 172             sfmt = br.read(3)?;
 173             validate!((sfmt != 0b000) && (sfmt != 0b111));
 174             br.read(2)?; // unknown flags
 175             deblock = br.read_bool()?;
 176             br.read(1)?; // unknown flag
 177             pbplus = br.read_bool()?;
 178             br.read(5)?; // unknown flags
 179             let marker = br.read(5)?;
 180             validate!(marker == 1);
 181         } else {
 182             deblock = false;
 183             pbplus = false;
 184         }
 185         self.is_ipb = pbplus;
 186         let w; let h;
 187         if sfmt == 0b110 {
 188             let par = br.read(4)?;
 189             w = ((br.read(9)? + 1) * 4) as usize;
 190             check_marker(br)?;
 191             h = ((br.read(9)? + 1) * 4) as usize;
 192             if par == 0b1111 {
 193                 let pixw = br.read(8)?;
 194                 let pixh = br.read(8)?;
 195                 validate!((pixw != 0) && (pixh != 0));
 196             }
 197         } else {
 198             let (w_, h_) = H263_SIZES[sfmt as usize];
 199             w = w_;
 200             h = h_;
 201         }
 202         let quant = br.read(5)?;
 203         let cpm = br.read_bool()?;
 204         validate!(!cpm);
 205
 206         let pbinfo;
 207         if self.is_pb {
 208             let trb = br.read(3)?;
 209             let dbquant = br.read(2)?;
 210             pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
 211         } else {
 212             pbinfo = None;
 213         }
 214         while br.read_bool()? { // skip PEI
 215             br.read(8)?;
 216         }
 217 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
 218         self.gob_no = 0;
 219         self.mb_w = (w + 15) >> 4;
 220
 221         let ftype = if is_intra { Type::I } else { Type::P };
 222         let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
 223         let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
 224         let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
 225         Ok(picinfo)
 226     }
 227
 228     #[allow(unused_variables)]
 229     fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
 230         let br = &mut self.br;
 231         let gbsc = br.read(17)?;
 232         validate!(gbsc == 1);
 233         let gn = br.read(5)?;
 234         let gfid = br.read(2)?;
 235         let gquant = br.read(5)?;
 236 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
 237         let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
 238         self.gob_no += 1;
 239         Ok(ret)
 240     }
 241
 242     #[allow(unused_variables)]
 243     fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
 244         let br = &mut self.br;
 245         let mut q = slice.get_quant();
 246         match info.get_mode() {
 247             Type::I => {
 248                     let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
 249                     while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
 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                         let idx = br.read(2)? as usize;
 255                         q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
 256                     }
 257                     Ok(BlockInfo::new(Type::I, cbp, q))
 258                 },
 259             Type::P => {
 260                     if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
 261                     let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
 262                     while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
 263                     let is_intra = (cbpc & 0x04) != 0;
 264                     let dquant   = (cbpc & 0x08) != 0;
 265                     let is_4x4   = (cbpc & 0x10) != 0;
 266                     if is_intra {
 267                         let mut mvec: Vec<MV> = Vec::new();
 268                         let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
 269                         let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 270                         let cbp = (cbpy << 2) | (cbpc & 3);
 271                         if dquant {
 272                             let idx = br.read(2)? as usize;
 273                             q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
 274                         }
 275                         let mut binfo = BlockInfo::new(Type::I, cbp, q);
 276                         binfo.set_bpart(bbinfo);
 277                         if self.is_pb {
 278                             for _ in 0..bbinfo.get_num_mv() {
 279                                 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
 280                             }
 281                             binfo.set_b_mv(mvec.as_slice());
 282                         }
 283                         return Ok(binfo);
 284                     }
 285
 286                     let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
 287                     let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 288 //                    if /* !aiv && */(cbpc & 3) != 3 {
 289                         cbpy ^= 0xF;
 290 //                    }
 291                     let cbp = (cbpy << 2) | (cbpc & 3);
 292                     if dquant {
 293                         let idx = br.read(2)? as usize;
 294                         q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
 295                     }
 296                     let mut binfo = BlockInfo::new(Type::P, cbp, q);
 297                     binfo.set_bpart(bbinfo);
 298                     if !is_4x4 {
 299                         let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
 300                         binfo.set_mv(&mvec);
 301                     } else {
 302                         let mvec: [MV; 4] = [
 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                                 decode_mv(br, &self.tables.mv_cb)?
 307                             ];
 308                         binfo.set_mv(&mvec);
 309                     }
 310                     if self.is_pb {
 311                         let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
 312                         for _ in 0..bbinfo.get_num_mv() {
 313                             let mv = decode_mv(br, &self.tables.mv_cb)?;
 314                             mvec.push(mv);
 315                         }
 316                         binfo.set_b_mv(mvec.as_slice());
 317                     }
 318                     Ok(binfo)
 319                 },
 320             _ => { Err(DecoderError::InvalidData) },
 321         }
 322     }
 323
 324     #[allow(unused_variables)]
 325     fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 326         self.decode_block(quant, true, coded, blk)
 327     }
 328
 329     #[allow(unused_variables)]
 330     fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 331         self.decode_block(quant, false, coded, blk)
 332     }
 333
 334     fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
 335 }
 336
 337 impl Intel263Decoder {
 338     fn new() -> Self {
 339         let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
 340         let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 341         let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
 342         let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 343         let mut coderead = H263ShortCodeReader::new(H263_CBPY);
 344         let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 345         let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
 346         let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 347         let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
 348         let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 349         let mut coderead = H263ShortCodeReader::new(H263_MV);
 350         let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 351         let tables = Tables {
 352             intra_mcbpc_cb,
 353             inter_mcbpc_cb,
 354             cbpy_cb,
 355             rl_cb,
 356             aic_rl_cb,
 357             mv_cb,
 358         };
 359
 360         Intel263Decoder{
 361             info:           NACodecInfo::new_dummy(),
 362             dec:            H263BaseDecoder::new(true),
 363             tables,
 364             bdsp:           H263BlockDSP::new(),
 365             lastframe:      None,
 366             lastpts:        None,
 367         }
 368     }
 369 }
 370
 371 impl NADecoder for Intel263Decoder {
 372     fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
 373         if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
 374             let w = vinfo.get_width();
 375             let h = vinfo.get_height();
 376             let fmt = formats::YUV420_FORMAT;
 377             let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
 378             self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
 379             Ok(())
 380         } else {
 381             Err(DecoderError::InvalidData)
 382         }
 383     }
 384     fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 385         let src = pkt.get_buffer();
 386
 387         if src.len() == 8 {
 388             let buftype;
 389             let ftype;
 390             if self.lastframe.is_none() {
 391                 buftype = NABufferType::None;
 392                 ftype = FrameType::Skip;
 393             } else {
 394                 let mut buf = None;
 395                 std::mem::swap(&mut self.lastframe, &mut buf);
 396                 buftype = buf.unwrap();
 397                 ftype = FrameType::B;
 398             }
 399             let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
 400             frm.set_keyframe(false);
 401             frm.set_frame_type(ftype);
 402             if self.lastpts.is_some() {
 403                 frm.set_pts(self.lastpts);
 404                 self.lastpts = None;
 405             }
 406             return Ok(frm.into_ref());
 407         }
 408         let mut ibr = Intel263BR::new(&src, &self.tables);
 409
 410         let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
 411
 412         let mut cur_pts = pkt.get_pts();
 413         if !self.dec.is_intra() {
 414             let bret = self.dec.get_bframe(&self.bdsp);
 415             if let Ok(b_buf) = bret {
 416                 self.lastframe = Some(b_buf);
 417                 self.lastpts = pkt.get_pts();
 418                 if let Some(pts) = pkt.get_pts() {
 419                     cur_pts = Some(pts + 1);
 420                 }
 421             }
 422         }
 423
 424         let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
 425         frm.set_keyframe(self.dec.is_intra());
 426         frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
 427         frm.set_pts(cur_pts);
 428         Ok(frm.into_ref())
 429     }
 430     fn flush(&mut self) {
 431         self.dec.flush();
 432     }
 433 }
 434
 435
 436 pub fn get_decoder() -> Box<dyn NADecoder + Send> {
 437     Box::new(Intel263Decoder::new())
 438 }
 439
 440 #[cfg(test)]
 441 mod test {
 442     use nihav_core::codecs::RegisteredDecoders;
 443     use nihav_core::demuxers::RegisteredDemuxers;
 444     use nihav_codec_support::test::dec_video::*;
 445     use crate::indeo_register_all_codecs;
 446     use nihav_commonfmt::generic_register_all_demuxers;
 447     #[test]
 448     fn test_intel263() {
 449         let mut dmx_reg = RegisteredDemuxers::new();
 450         generic_register_all_demuxers(&mut dmx_reg);
 451         let mut dec_reg = RegisteredDecoders::new();
 452         indeo_register_all_codecs(&mut dec_reg);
 453
 454         test_file_decoding("avi", "assets/Indeo/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/, &dmx_reg, &dec_reg);
 455     }
 456 }