src/codecs/h263/mod.rs

   1 use super::{DecoderResult, MV, ZERO_MV};
   2 use crate::frame::NAVideoBuffer;
   3
   4 pub mod code;
   5 pub mod data;
   6 pub mod decoder;
   7
   8 #[cfg(feature="decoder_intel263")]
   9 pub mod intel263;
  10 #[cfg(feature="decoder_realvideo1")]
  11 pub mod rv10;
  12 #[cfg(feature="decoder_realvideo2")]
  13 pub mod rv20;
  14
  15 pub trait BlockDecoder {
  16     fn decode_pichdr(&mut self) -> DecoderResult<PicInfo>;
  17     fn decode_slice_header(&mut self, pinfo: &PicInfo) -> DecoderResult<SliceInfo>;
  18     fn decode_block_header(&mut self, pinfo: &PicInfo, sinfo: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo>;
  19     fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>;
  20     fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>;
  21     fn is_slice_end(&mut self) -> bool;
  22 }
  23
  24 pub trait BlockDSP {
  25     fn idct(&self, blk: &mut [i16; 64]);
  26     fn copy_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV);
  27     fn avg_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV);
  28     fn filter_row(&self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo);
  29 }
  30
  31 #[allow(dead_code)]
  32 #[derive(Debug,Clone,Copy,PartialEq)]
  33 pub enum Type {
  34     I, P, PB, Skip, B, Special
  35 }
  36
  37 impl Type {
  38     pub fn is_ref(&self) -> bool {
  39         match *self {
  40             Type::I | Type::P | Type::PB => true,
  41             _                            => false,
  42         }
  43     }
  44 }
  45
  46 #[allow(dead_code)]
  47 #[derive(Debug,Clone,Copy)]
  48 pub struct PBInfo {
  49     trb:        u8,
  50     dbquant:    u8,
  51     improved:   bool,
  52 }
  53
  54 impl PBInfo {
  55     pub fn new(trb: u8, dbquant: u8, improved: bool) -> Self {
  56         PBInfo{ trb: trb, dbquant: dbquant, improved: improved }
  57     }
  58     pub fn get_trb(&self) -> u8 { self.trb }
  59     pub fn get_dbquant(&self) -> u8 { self.dbquant }
  60     pub fn is_improved(&self) -> bool { self.improved }
  61 }
  62
  63 #[allow(dead_code)]
  64 #[derive(Debug,Clone,Copy)]
  65 pub struct PicInfo {
  66     pub w:          usize,
  67     pub h:          usize,
  68     pub mode:       Type,
  69     pub mvmode:     MVMode,
  70     pub umv:        bool,
  71     pub apm:        bool,
  72     pub quant:      u8,
  73     pub pb:         Option<PBInfo>,
  74     pub ts:         u16,
  75     pub plusinfo:   Option<PlusInfo>,
  76 }
  77
  78 #[allow(dead_code)]
  79 impl PicInfo {
  80     pub fn new(w: usize, h: usize, mode: Type, mvmode: MVMode, umv: bool, apm: bool, quant: u8, ts: u16, pb: Option<PBInfo>, plusinfo: Option<PlusInfo>) -> Self {
  81         PicInfo {
  82             w: w, h: h, mode: mode, mvmode: mvmode,
  83             umv: umv, apm: apm, quant: quant,
  84             pb: pb, ts: ts, plusinfo: plusinfo
  85         }
  86     }
  87     pub fn get_width(&self) -> usize { self.w }
  88     pub fn get_height(&self) -> usize { self.h }
  89     pub fn get_mode(&self) -> Type { self.mode }
  90     pub fn get_quant(&self) -> u8 { self.quant }
  91     pub fn get_apm(&self) -> bool { self.apm }
  92     pub fn is_pb(&self) -> bool { self.pb.is_some() }
  93     pub fn is_ipb(&self) -> bool {
  94             if let Some(ref pbi) = self.pb {
  95                 pbi.is_improved()
  96             } else {
  97                 false
  98             }
  99         }
 100     pub fn get_ts(&self) -> u16 { self.ts }
 101     pub fn get_pbinfo(&self) -> PBInfo { self.pb.unwrap() }
 102     pub fn get_plusifo(&self) -> Option<PlusInfo> { self.plusinfo }
 103     pub fn get_mvmode(&self) -> MVMode { self.mvmode }
 104 }
 105
 106 #[allow(dead_code)]
 107 #[derive(Debug,Clone,Copy)]
 108 pub struct PlusInfo {
 109     pub aic:        bool,
 110     pub deblock:    bool,
 111     pub aiv_mode:   bool,
 112     pub mq_mode:    bool,
 113 }
 114
 115 impl PlusInfo {
 116     pub fn new(aic: bool, deblock: bool, aiv_mode: bool, mq_mode: bool) -> Self {
 117         PlusInfo { aic: aic, deblock: deblock, aiv_mode: aiv_mode, mq_mode: mq_mode }
 118     }
 119 }
 120
 121 #[allow(dead_code)]
 122 #[derive(Debug,Clone,Copy)]
 123 pub struct SliceInfo {
 124     pub mb_x:   usize,
 125     pub mb_y:   usize,
 126     pub mb_end: usize,
 127     pub quant:  u8,
 128 }
 129
 130 #[allow(dead_code)]
 131 #[derive(Debug,Clone,Copy)]
 132 pub struct SliceState {
 133     pub is_iframe:  bool,
 134     pub mb_x:       usize,
 135     pub mb_y:       usize,
 136     pub first_line: bool,
 137     pub first_mb:   bool,
 138     pub slice_mb_x: usize,
 139     pub slice_mb_y: usize,
 140     pub quant:      u8,
 141 }
 142
 143 const SLICE_NO_END: usize = 99999999;
 144
 145 impl SliceInfo {
 146     pub fn new(mb_x: usize, mb_y: usize, mb_end: usize, quant: u8) -> Self {
 147         SliceInfo{ mb_x: mb_x, mb_y: mb_y, mb_end: mb_end, quant: quant }
 148     }
 149     pub fn new_gob(mb_x: usize, mb_y: usize, quant: u8) -> Self {
 150         SliceInfo{ mb_x: mb_x, mb_y: mb_y, mb_end: SLICE_NO_END, quant: quant }
 151     }
 152     pub fn get_default_slice(pinfo: &PicInfo) -> Self {
 153         SliceInfo{ mb_x: 0, mb_y: 0, mb_end: SLICE_NO_END, quant: pinfo.get_quant() }
 154     }
 155     pub fn get_quant(&self) -> u8 { self.quant }
 156     pub fn is_at_end(&self, mb_pos: usize) -> bool { self.mb_end == mb_pos }
 157     pub fn needs_check(&self) -> bool { self.mb_end == SLICE_NO_END }
 158 }
 159
 160 impl SliceState {
 161     pub fn new(is_iframe: bool) -> Self {
 162         SliceState {
 163             is_iframe: is_iframe, mb_x: 0, mb_y: 0, first_line: true, first_mb: true,
 164             slice_mb_x: 0, slice_mb_y: 0, quant: 0
 165         }
 166     }
 167     pub fn next_mb(&mut self) {
 168         self.mb_x += 1; self.first_mb = false;
 169         if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y {
 170             self.first_line = false;
 171         }
 172     }
 173     pub fn new_row(&mut self) {
 174         self.mb_x = 0; self.mb_y += 1;
 175         if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y {
 176             self.first_line = false;
 177         }
 178         self.first_mb = true;
 179     }
 180     pub fn reset_slice(&mut self, smb_x: usize, smb_y: usize) {
 181         self.slice_mb_x = smb_x;
 182         self.slice_mb_y = smb_y;
 183         self.first_line = true;
 184         self.first_mb   = true;
 185     }
 186 }
 187
 188 #[derive(Debug,Clone,Copy)]
 189 pub struct BlockInfo {
 190     pub intra:   bool,
 191     pub skip:    bool,
 192     pub mode:    Type,
 193     pub cbp:     u8,
 194     pub q:       u8,
 195     pub mv:      [MV; 4],
 196     pub num_mv:  usize,
 197     pub bpart:   bool,
 198     pub b_cbp:   u8,
 199     pub mv2:     [MV; 2],
 200     pub num_mv2: usize,
 201     pub fwd:     bool,
 202     pub acpred:  ACPredMode,
 203 }
 204
 205 #[allow(dead_code)]
 206 #[derive(Debug,Clone,Copy)]
 207 pub struct BBlockInfo {
 208     present: bool,
 209     cbp:     u8,
 210     num_mv:  usize,
 211     fwd:     bool,
 212 }
 213
 214 #[allow(non_camel_case_types)]
 215 #[derive(Debug,Clone,Copy)]
 216 pub enum BlockMVInfo {
 217     Intra,
 218     Inter_1MV(MV),
 219     Inter_4MV([MV; 4]),
 220 }
 221
 222 #[allow(dead_code)]
 223 #[derive(Debug,Clone,Copy,PartialEq)]
 224 pub enum ACPredMode {
 225     None,
 226     DC,
 227     Ver,
 228     Hor,
 229 }
 230
 231 #[allow(dead_code)]
 232 impl BlockInfo {
 233     pub fn new(mode: Type, cbp: u8, q: u8) -> Self {
 234         BlockInfo {
 235             intra:   mode == Type::I,
 236             skip:    (cbp == 0) && (mode != Type::I),
 237             mode:    mode,
 238             cbp:     cbp,
 239             q:       q,
 240             mv:      [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)],
 241             num_mv:  0,
 242             bpart:   false,
 243             b_cbp:   0,
 244             mv2:     [ZERO_MV, ZERO_MV],
 245             num_mv2: 0,
 246             fwd:     false,
 247             acpred:  ACPredMode::None,
 248         }
 249     }
 250     pub fn is_intra(&self) -> bool { self.intra }
 251     pub fn is_skipped(&self) -> bool { self.skip }
 252     pub fn get_mode(&self) -> Type { self.mode }
 253     pub fn get_cbp(&self) -> u8 { self.cbp }
 254     pub fn get_q(&self) -> u8 { self.q }
 255     pub fn get_num_mvs(&self) -> usize { self.num_mv }
 256     pub fn get_mv(&self, idx: usize) -> MV { self.mv[idx] }
 257     pub fn has_b_part(&self) -> bool { self.bpart }
 258     pub fn get_cbp_b(&self) -> u8 { self.b_cbp }
 259     pub fn get_num_mvs2(&self) -> usize { self.num_mv2 }
 260     pub fn get_mv2(&self, idx: usize) -> MV { self.mv2[idx] }
 261     pub fn set_mv(&mut self, mvs: &[MV]) {
 262         if mvs.len() > 0 { self.skip = false; }
 263         let mut mv_arr: [MV; 4] = [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)];
 264         for i in 0..mvs.len() { mv_arr[i] = mvs[i]; }
 265         self.mv     = mv_arr;
 266         self.num_mv = mvs.len();
 267     }
 268     pub fn set_bpart(&mut self, bbinfo: BBlockInfo) {
 269         self.bpart = bbinfo.present;
 270         self.b_cbp = bbinfo.cbp;
 271         self.fwd   = bbinfo.fwd;
 272         self.num_mv2 = bbinfo.get_num_mv();
 273     }
 274     pub fn set_b_mv(&mut self, mvs: &[MV]) {
 275         if mvs.len() > 0 { self.skip = false; }
 276         let mut mv_arr: [MV; 2] = [ZERO_MV, ZERO_MV];
 277         for i in 0..mvs.len() { mv_arr[i] = mvs[i]; }
 278         self.mv2     = mv_arr;
 279         self.num_mv2 = mvs.len();
 280     }
 281     pub fn is_b_fwd(&self) -> bool { self.fwd }
 282     pub fn set_acpred(&mut self, acpred: ACPredMode) { self.acpred = acpred }
 283     pub fn get_acpred(&self) -> ACPredMode { self.acpred }
 284 }
 285
 286 impl BBlockInfo {
 287     pub fn new(present: bool, cbp: u8, num_mv: usize, fwd: bool) -> Self {
 288         BBlockInfo {
 289             present: present,
 290             cbp:     cbp,
 291             num_mv:  num_mv,
 292             fwd:     fwd,
 293         }
 294     }
 295     pub fn get_num_mv(&self) -> usize { self.num_mv }
 296 }
 297
 298 #[derive(Debug,Clone,Copy)]
 299 pub enum MVMode {
 300     Old,
 301     Long,
 302     UMV,
 303 }
 304
 305 pub trait H263MVTrait {
 306     fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV;
 307     fn scale(&self, trb: u16, trd: u16) -> MV;
 308     fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV;
 309 }
 310
 311 impl H263MVTrait for MV {
 312     fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV {
 313         let mut new_mv = pred_mv + add;
 314         match mvmode {
 315             MVMode::Old => {
 316                     if      new_mv.x >=  64 { new_mv.x -= 64; }
 317                     else if new_mv.x <= -64 { new_mv.x += 64; }
 318                     if      new_mv.y >=  64 { new_mv.y -= 64; }
 319                     else if new_mv.y <= -64 { new_mv.y += 64; }
 320                 },
 321             MVMode::Long => {
 322                     if      new_mv.x >  31 { new_mv.x -= 64; }
 323                     else if new_mv.x < -32 { new_mv.x += 64; }
 324                     if      new_mv.y >  31 { new_mv.y -= 64; }
 325                     else if new_mv.y < -32 { new_mv.y += 64; }
 326                 },
 327             MVMode::UMV => {
 328                     if pred_mv.x >  32 && new_mv.x >  63 { new_mv.x -= 64; }
 329                     if pred_mv.x < -31 && new_mv.x < -63 { new_mv.x += 64; }
 330                     if pred_mv.y >  32 && new_mv.y >  63 { new_mv.y -= 64; }
 331                     if pred_mv.y < -31 && new_mv.y < -63 { new_mv.y += 64; }
 332                 },
 333         };
 334         new_mv
 335     }
 336     fn scale(&self, trb: u16, trd: u16) -> MV {
 337         if (trd == 0) || (trb == 0) {
 338             ZERO_MV
 339         } else {
 340             MV { x: (((self.x as i32) * (trb as i32)) / (trd as i32)) as i16, y: (((self.y as i32) * (trb as i32)) / (trd as i32)) as i16 }
 341         }
 342     }
 343     fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV {
 344         let bscale = (trb as i32) - (trd as i32);
 345         let x = if bvec.x != 0 { fwdvec.x - pvec.x } else if trd != 0 { (bscale * (pvec.x as i32) / (trd as i32)) as i16 } else { 0 };
 346         let y = if bvec.y != 0 { fwdvec.y - pvec.y } else if trd != 0 { (bscale * (pvec.y as i32) / (trd as i32)) as i16 } else { 0 };
 347         MV { x: x, y: y }
 348     }
 349 }
 350
 351 #[allow(dead_code)]
 352 pub struct CBPInfo {
 353     cbp:        Vec<u8>,
 354     q:          Vec<u8>,
 355     mb_w:       usize,
 356 }
 357
 358 impl CBPInfo {
 359     fn new() -> Self { CBPInfo{ cbp: Vec::new(), q: Vec::new(), mb_w: 0 } }
 360     fn reset(&mut self, mb_w: usize) {
 361         self.mb_w = mb_w;
 362         self.cbp.truncate(0);
 363         self.cbp.resize(self.mb_w * 2, 0);
 364         self.q.truncate(0);
 365         self.q.resize(self.mb_w * 2, 0);
 366     }
 367     fn update_row(&mut self) {
 368         for i in 0..self.mb_w {
 369             self.cbp[i] = self.cbp[self.mb_w + i];
 370             self.q[i]   = self.q[self.mb_w + i];
 371         }
 372     }
 373     fn set_cbp(&mut self, mb_x: usize, cbp: u8) {
 374         self.cbp[self.mb_w + mb_x] = cbp;
 375     }
 376     fn set_q(&mut self, mb_x: usize, q: u8) {
 377         self.q[self.mb_w + mb_x] = q;
 378     }
 379     pub fn get_q(&self, mb_x: usize) -> u8 { self.q[mb_x] }
 380     pub fn is_coded(&self, mb_x: usize, blk_no: usize) -> bool {
 381         (self.cbp[self.mb_w + mb_x] & (1 << (5 - blk_no))) != 0
 382     }
 383     pub fn is_coded_top(&self, mb_x: usize, blk_no: usize) -> bool {
 384         let cbp     = self.cbp[self.mb_w + mb_x];
 385         let cbp_top = self.cbp[mb_x];
 386         match blk_no {
 387             0 => { (cbp_top & 0b001000) != 0 },
 388             1 => { (cbp_top & 0b000100) != 0 },
 389             2 => { (cbp     & 0b100000) != 0 },
 390             3 => { (cbp     & 0b010000) != 0 },
 391             4 => { (cbp_top & 0b000010) != 0 },
 392             _ => { (cbp_top & 0b000001) != 0 },
 393         }
 394     }
 395 }
 396