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 }
  28
  29 struct Intel263BR<'a> {
  30     br:     BitReader<'a>,
  31     tables: &'a Tables,
  32     gob_no: usize,
  33     mb_w:   usize,
  34     is_pb:  bool,
  35     is_ipb: bool,
  36 }
  37
  38 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
  39     let mark = br.read(1)?;
  40     validate!(mark == 1);
  41     Ok(())
  42 }
  43
  44 impl<'a> Intel263BR<'a> {
  45     fn new(src: &'a [u8], tables: &'a Tables) -> Self {
  46         Intel263BR {
  47             br:     BitReader::new(src, BitReaderMode::BE),
  48             tables,
  49             gob_no: 0,
  50             mb_w:   0,
  51             is_pb:  false,
  52             is_ipb: false,
  53         }
  54     }
  55
  56     fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
  57         let br = &mut self.br;
  58         let mut idx = 0;
  59         if intra {
  60             let mut dc = br.read(8)?;
  61             if dc == 255 { dc = 128; }
  62             blk[0] = (dc as i16) << 3;
  63             idx = 1;
  64         }
  65         if !coded { return Ok(()); }
  66
  67         let rl_cb = &self.tables.rl_cb; // could be aic too
  68         let q_add = if quant == 0 { 0i16 } else { i16::from((quant - 1) | 1) };
  69         let q = i16::from(quant * 2);
  70         while idx < 64 {
  71             let code = br.read_cb(rl_cb)?;
  72             let run;
  73             let mut level;
  74             let last;
  75             if !code.is_escape() {
  76                 run   = code.get_run();
  77                 level = code.get_level();
  78                 last  = code.is_last();
  79                 if br.read_bool()? { level = -level; }
  80                 level = (level * q) + q_add;
  81             } else {
  82                 last  = br.read_bool()?;
  83                 run   = br.read(6)? as u8;
  84                 level = br.read_s(8)? as i16;
  85                 if level == -128 {
  86                     let low = br.read(5)? as i16;
  87                     let top = br.read_s(6)? as i16;
  88                     level = (top << 5) | low;
  89                 }
  90                 level = (level * q) + q_add;
  91                 if level < -2048 { level = -2048; }
  92                 if level >  2047 { level =  2047; }
  93             }
  94             idx += run;
  95             validate!(idx < 64);
  96             let oidx = ZIGZAG[idx as usize];
  97             blk[oidx] = level;
  98             idx += 1;
  99             if last { break; }
 100         }
 101         Ok(())
 102     }
 103 }
 104
 105 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
 106     let code = i16::from(br.read_cb(mv_cb)?);
 107     if code == 0 { return Ok(0) }
 108     if !br.read_bool()? {
 109         Ok(code)
 110     } else {
 111         Ok(-code)
 112     }
 113 }
 114
 115 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
 116     let xval = decode_mv_component(br, mv_cb)?;
 117     let yval = decode_mv_component(br, mv_cb)?;
 118     Ok(MV::new(xval, yval))
 119 }
 120
 121 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
 122     if is_pb { // as improved pb
 123         if is_ipb {
 124             let pb_mv_add = if is_intra { 1 } else { 0 };
 125             if br.read_bool()?{
 126                 if br.read_bool()? {
 127                     let pb_mv_count = 1 - (br.read(1)? as usize);
 128                     let cbpb = br.read(6)? as u8;
 129                     Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
 130                 } else {
 131                     Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
 132                 }
 133             } else {
 134                 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
 135             }
 136         } else {
 137             let mvdb = br.read_bool()?;
 138             let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
 139             Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
 140         }
 141     } else {
 142         Ok(BBlockInfo::new(false, 0, 0, false))
 143     }
 144 }
 145
 146 impl<'a> BlockDecoder for Intel263BR<'a> {
 147
 148 #[allow(unused_variables)]
 149     fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
 150         let br = &mut self.br;
 151         let syncw = br.read(22)?;
 152         validate!(syncw == 0x000020);
 153         let tr = (br.read(8)? << 8) as u16;
 154         check_marker(br)?;
 155         let id = br.read(1)?;
 156         validate!(id == 0);
 157         br.read(1)?; // split screen indicator
 158         br.read(1)?; // document camera indicator
 159         br.read(1)?; // freeze picture release
 160         let mut sfmt = br.read(3)?;
 161         validate!((sfmt != 0b000) && (sfmt != 0b110));
 162         let is_intra = !br.read_bool()?;
 163         let umv = br.read_bool()?;
 164         br.read(1)?; // syntax arithmetic coding
 165         let apm = br.read_bool()?;
 166         self.is_pb = br.read_bool()?;
 167         let deblock;
 168         let pbplus;
 169         if sfmt == 0b111 {
 170             sfmt = br.read(3)?;
 171             validate!((sfmt != 0b000) && (sfmt != 0b111));
 172             br.read(2)?; // unknown flags
 173             deblock = br.read_bool()?;
 174             br.read(1)?; // unknown flag
 175             pbplus = br.read_bool()?;
 176             br.read(5)?; // unknown flags
 177             let marker = br.read(5)?;
 178             validate!(marker == 1);
 179         } else {
 180             deblock = false;
 181             pbplus = false;
 182         }
 183         self.is_ipb = pbplus;
 184         let w; let h;
 185         if sfmt == 0b110 {
 186             let par = br.read(4)?;
 187             w = ((br.read(9)? + 1) * 4) as usize;
 188             check_marker(br)?;
 189             h = ((br.read(9)? + 1) * 4) as usize;
 190             if par == 0b1111 {
 191                 let pixw = br.read(8)?;
 192                 let pixh = br.read(8)?;
 193                 validate!((pixw != 0) && (pixh != 0));
 194             }
 195         } else {
 196             let (w_, h_) = H263_SIZES[sfmt as usize];
 197             w = w_;
 198             h = h_;
 199         }
 200         let quant = br.read(5)?;
 201         let cpm = br.read_bool()?;
 202         validate!(!cpm);
 203
 204         let pbinfo;
 205         if self.is_pb {
 206             let trb = br.read(3)?;
 207             let dbquant = br.read(2)?;
 208             pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
 209         } else {
 210             pbinfo = None;
 211         }
 212         while br.read_bool()? { // skip PEI
 213             br.read(8)?;
 214         }
 215 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
 216         self.gob_no = 0;
 217         self.mb_w = (w + 15) >> 4;
 218
 219         let ftype = if is_intra { Type::I } else { Type::P };
 220         let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
 221         let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
 222         let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
 223         Ok(picinfo)
 224     }
 225
 226     #[allow(unused_variables)]
 227     fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
 228         let br = &mut self.br;
 229         let gbsc = br.read(17)?;
 230         validate!(gbsc == 1);
 231         let gn = br.read(5)?;
 232         let gfid = br.read(2)?;
 233         let gquant = br.read(5)?;
 234 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
 235         let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
 236         self.gob_no += 1;
 237         Ok(ret)
 238     }
 239
 240     #[allow(unused_variables)]
 241     fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
 242         let br = &mut self.br;
 243         let mut q = slice.get_quant();
 244         match info.get_mode() {
 245             Type::I => {
 246                     let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
 247                     while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
 248                     let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 249                     let cbp = (cbpy << 2) | (cbpc & 3);
 250                     let dquant = (cbpc & 4) != 0;
 251                     if dquant {
 252                         let idx = br.read(2)? as usize;
 253                         q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
 254                     }
 255                     Ok(BlockInfo::new(Type::I, cbp, q))
 256                 },
 257             Type::P => {
 258                     if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
 259                     let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
 260                     while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
 261                     let is_intra = (cbpc & 0x04) != 0;
 262                     let dquant   = (cbpc & 0x08) != 0;
 263                     let is_4x4   = (cbpc & 0x10) != 0;
 264                     if is_intra {
 265                         let mut mvec: Vec<MV> = Vec::new();
 266                         let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
 267                         let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 268                         let cbp = (cbpy << 2) | (cbpc & 3);
 269                         if dquant {
 270                             let idx = br.read(2)? as usize;
 271                             q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
 272                         }
 273                         let mut binfo = BlockInfo::new(Type::I, cbp, q);
 274                         binfo.set_bpart(bbinfo);
 275                         if self.is_pb {
 276                             for _ in 0..bbinfo.get_num_mv() {
 277                                 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
 278                             }
 279                             binfo.set_b_mv(mvec.as_slice());
 280                         }
 281                         return Ok(binfo);
 282                     }
 283
 284                     let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
 285                     let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
 286 //                    if /* !aiv && */(cbpc & 3) != 3 {
 287                         cbpy ^= 0xF;
 288 //                    }
 289                     let cbp = (cbpy << 2) | (cbpc & 3);
 290                     if dquant {
 291                         let idx = br.read(2)? as usize;
 292                         q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
 293                     }
 294                     let mut binfo = BlockInfo::new(Type::P, cbp, q);
 295                     binfo.set_bpart(bbinfo);
 296                     if !is_4x4 {
 297                         let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
 298                         binfo.set_mv(&mvec);
 299                     } else {
 300                         let mvec: [MV; 4] = [
 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                                 decode_mv(br, &self.tables.mv_cb)?
 305                             ];
 306                         binfo.set_mv(&mvec);
 307                     }
 308                     if self.is_pb {
 309                         let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
 310                         for _ in 0..bbinfo.get_num_mv() {
 311                             let mv = decode_mv(br, &self.tables.mv_cb)?;
 312                             mvec.push(mv);
 313                         }
 314                         binfo.set_b_mv(mvec.as_slice());
 315                     }
 316                     Ok(binfo)
 317                 },
 318             _ => { Err(DecoderError::InvalidData) },
 319         }
 320     }
 321
 322     #[allow(unused_variables)]
 323     fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 324         self.decode_block(quant, true, coded, blk)
 325     }
 326
 327     #[allow(unused_variables)]
 328     fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
 329         self.decode_block(quant, false, coded, blk)
 330     }
 331
 332     fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
 333 }
 334
 335 impl Intel263Decoder {
 336     fn new() -> Self {
 337         let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
 338         let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 339         let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
 340         let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 341         let mut coderead = H263ShortCodeReader::new(H263_CBPY);
 342         let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 343         let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
 344         let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 345         let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
 346         let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 347         let mut coderead = H263ShortCodeReader::new(H263_MV);
 348         let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
 349         let tables = Tables {
 350             intra_mcbpc_cb,
 351             inter_mcbpc_cb,
 352             cbpy_cb,
 353             rl_cb,
 354             aic_rl_cb,
 355             mv_cb,
 356         };
 357
 358         Intel263Decoder{
 359             info:           NACodecInfo::new_dummy(),
 360             dec:            H263BaseDecoder::new(true),
 361             tables,
 362             bdsp:           H263BlockDSP::new(),
 363         }
 364     }
 365 }
 366
 367 impl NADecoder for Intel263Decoder {
 368     fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
 369         if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
 370             let w = vinfo.get_width();
 371             let h = vinfo.get_height();
 372             let fmt = formats::YUV420_FORMAT;
 373             let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
 374             self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
 375             Ok(())
 376         } else {
 377             Err(DecoderError::InvalidData)
 378         }
 379     }
 380     fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 381         let src = pkt.get_buffer();
 382
 383         if src.len() == 8 {
 384             let bret = self.dec.get_bframe(&self.bdsp);
 385             let buftype;
 386             let is_skip;
 387             if let Ok(btype) = bret {
 388                 buftype = btype;
 389                 is_skip = false;
 390             } else {
 391                 buftype = NABufferType::None;
 392                 is_skip = true;
 393             }
 394             let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
 395             frm.set_keyframe(false);
 396             frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
 397             return Ok(frm.into_ref());
 398         }
 399         let mut ibr = Intel263BR::new(&src, &self.tables);
 400
 401         let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
 402
 403         let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
 404         frm.set_keyframe(self.dec.is_intra());
 405         frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
 406         Ok(frm.into_ref())
 407     }
 408     fn flush(&mut self) {
 409         self.dec.flush();
 410     }
 411 }
 412
 413
 414 pub fn get_decoder() -> Box<dyn NADecoder + Send> {
 415     Box::new(Intel263Decoder::new())
 416 }
 417
 418 #[cfg(test)]
 419 mod test {
 420     use nihav_core::codecs::RegisteredDecoders;
 421     use nihav_core::demuxers::RegisteredDemuxers;
 422     use nihav_core::test::dec_video::*;
 423     use crate::indeo_register_all_codecs;
 424     use nihav_commonfmt::generic_register_all_demuxers;
 425     #[test]
 426     fn test_intel263() {
 427         let mut dmx_reg = RegisteredDemuxers::new();
 428         generic_register_all_demuxers(&mut dmx_reg);
 429         let mut dec_reg = RegisteredDecoders::new();
 430         indeo_register_all_codecs(&mut dec_reg);
 431
 432         test_file_decoding("avi", "assets/Indeo/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/, &dmx_reg, &dec_reg);
 433     }
 434 }