| 1 | use nihav_core::codecs::{DecoderResult, DecoderError}; |
| 2 | use nihav_core::io::bitreader::*; |
| 3 | use nihav_core::io::codebook::*; |
| 4 | use nihav_core::io::intcode::*; |
| 5 | use super::*; |
| 6 | use super::dsp::{CHROMA_DC_SCAN, ZIGZAG, ZIGZAG1}; |
| 7 | use super::slice::SliceHeader; |
| 8 | |
| 9 | fn map_i_type(idx: usize) -> MBType { |
| 10 | if idx == 0 { |
| 11 | MBType::Intra4x4 |
| 12 | } else if idx == 25 { |
| 13 | MBType::PCM |
| 14 | } else { |
| 15 | let imode = ((idx - 1) & 3) as u8; |
| 16 | let cbpc = ((idx - 1) / 4) as u8; |
| 17 | let (cbpy, cbpc) = if cbpc >= 3 { (0xF, cbpc - 3) } else { (0x0, cbpc) }; |
| 18 | MBType::Intra16x16(imode, cbpy, cbpc) |
| 19 | } |
| 20 | } |
| 21 | |
| 22 | const NUM_I_TYPES: usize = 26; |
| 23 | |
| 24 | const P_TYPES: [MBType; 5] = [ |
| 25 | MBType::P16x16, MBType::P16x8, MBType::P8x16, MBType::P8x8, MBType::P8x8Ref0 |
| 26 | ]; |
| 27 | |
| 28 | const B_TYPES: [MBType; 23] = [ |
| 29 | MBType::Direct, |
| 30 | MBType::B16x16(BMode::L0), |
| 31 | MBType::B16x16(BMode::L1), |
| 32 | MBType::B16x16(BMode::Bi), |
| 33 | MBType::B16x8(BMode::L0, BMode::L0), |
| 34 | MBType::B8x16(BMode::L0, BMode::L0), |
| 35 | MBType::B16x8(BMode::L1, BMode::L1), |
| 36 | MBType::B8x16(BMode::L1, BMode::L1), |
| 37 | MBType::B16x8(BMode::L0, BMode::L1), |
| 38 | MBType::B8x16(BMode::L0, BMode::L1), |
| 39 | MBType::B16x8(BMode::L1, BMode::L0), |
| 40 | MBType::B8x16(BMode::L1, BMode::L0), |
| 41 | MBType::B16x8(BMode::L0, BMode::Bi), |
| 42 | MBType::B8x16(BMode::L0, BMode::Bi), |
| 43 | MBType::B16x8(BMode::L1, BMode::Bi), |
| 44 | MBType::B8x16(BMode::L1, BMode::Bi), |
| 45 | MBType::B16x8(BMode::Bi, BMode::L0), |
| 46 | MBType::B8x16(BMode::Bi, BMode::L0), |
| 47 | MBType::B16x8(BMode::Bi, BMode::L1), |
| 48 | MBType::B8x16(BMode::Bi, BMode::L1), |
| 49 | MBType::B16x8(BMode::Bi, BMode::Bi), |
| 50 | MBType::B8x16(BMode::Bi, BMode::Bi), |
| 51 | MBType::B8x8, |
| 52 | ]; |
| 53 | |
| 54 | pub fn decode_mb_type_cavlc(br: &mut BitReader, slice_hdr: &SliceHeader) -> DecoderResult<MBType> { |
| 55 | let mb_type_id = br.read_ue()? as usize; |
| 56 | match slice_hdr.slice_type { |
| 57 | SliceType::I => { |
| 58 | validate!(mb_type_id < NUM_I_TYPES); |
| 59 | Ok(map_i_type(mb_type_id)) |
| 60 | }, |
| 61 | SliceType::SI => { |
| 62 | validate!(mb_type_id < NUM_I_TYPES + 1); |
| 63 | if mb_type_id == 0 { |
| 64 | Ok(MBType::Intra4x4) // special SI one |
| 65 | } else { |
| 66 | Ok(map_i_type(mb_type_id - 1)) |
| 67 | } |
| 68 | }, |
| 69 | SliceType::P | SliceType::SP => { |
| 70 | validate!(mb_type_id < NUM_I_TYPES + P_TYPES.len()); |
| 71 | if mb_type_id < P_TYPES.len() { |
| 72 | Ok(P_TYPES[mb_type_id]) |
| 73 | } else { |
| 74 | Ok(map_i_type(mb_type_id - P_TYPES.len())) |
| 75 | } |
| 76 | }, |
| 77 | SliceType::B => { |
| 78 | validate!(mb_type_id < NUM_I_TYPES + B_TYPES.len()); |
| 79 | if mb_type_id < B_TYPES.len() { |
| 80 | Ok(B_TYPES[mb_type_id]) |
| 81 | } else { |
| 82 | Ok(map_i_type(mb_type_id - B_TYPES.len())) |
| 83 | } |
| 84 | }, |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | fn read_refs(br: &mut BitReader, dst: &mut [PicRef], num_refs: usize) -> DecoderResult<()> { |
| 89 | if num_refs > 1 { |
| 90 | for pic_ref in dst.iter_mut() { |
| 91 | *pic_ref = PicRef::new(br.read_te(num_refs as u32 - 1)? as u8); |
| 92 | } |
| 93 | } else { |
| 94 | for pic_ref in dst.iter_mut() { |
| 95 | *pic_ref = ZERO_REF; |
| 96 | } |
| 97 | } |
| 98 | Ok(()) |
| 99 | } |
| 100 | |
| 101 | fn read_mvs(br: &mut BitReader, mvs: &mut [MV]) -> DecoderResult<()> { |
| 102 | for mv in mvs.iter_mut() { |
| 103 | mv.x = br.read_se()? as i16; |
| 104 | mv.y = br.read_se()? as i16; |
| 105 | } |
| 106 | Ok(()) |
| 107 | } |
| 108 | |
| 109 | #[allow(clippy::cognitive_complexity)] |
| 110 | pub fn decode_mb_pred_cavlc(br: &mut BitReader, slice_hdr: &SliceHeader, mb_type: MBType, sstate: &mut SliceState, mb_info: &mut CurrentMBInfo) -> DecoderResult<()> { |
| 111 | mb_info.mb_type = mb_type; |
| 112 | let num_l0 = slice_hdr.num_ref_idx_l0_active; |
| 113 | let num_l1 = slice_hdr.num_ref_idx_l1_active; |
| 114 | match mb_type { |
| 115 | MBType::Intra4x4 => { |
| 116 | for &(x, y) in I4X4_SCAN.iter() { |
| 117 | let x = x as usize; |
| 118 | let y = y as usize; |
| 119 | let top_pred = sstate.get_top_blk4(x + y * 4).ipred; |
| 120 | let left_pred = sstate.get_left_blk4(x + y * 4).ipred; |
| 121 | |
| 122 | let top_idx = top_pred.into_pred_idx(); |
| 123 | let left_idx = left_pred.into_pred_idx(); |
| 124 | let pred_mode = top_idx.min(left_idx); |
| 125 | let mut pred_mode = if pred_mode != -1 { pred_mode as u8 } else { 2 }; |
| 126 | if !br.read_bool()? { |
| 127 | let new_mode = br.read(3)? as u8; |
| 128 | pred_mode = if new_mode >= pred_mode { |
| 129 | new_mode + 1 |
| 130 | } else { new_mode }; |
| 131 | } |
| 132 | mb_info.ipred[x + y * 4] = pred_mode.into(); |
| 133 | sstate.get_cur_blk4(x + y * 4).ipred = pred_mode.into(); |
| 134 | } |
| 135 | mb_info.chroma_ipred = br.read_ue_lim(3)? as u8; |
| 136 | }, |
| 137 | MBType::Intra8x8 => { |
| 138 | for part in 0..4 { |
| 139 | let blk4 = (part & 1) * 2 + (part & 2) * 4; |
| 140 | let top_pred = sstate.get_top_blk4(blk4).ipred; |
| 141 | let left_pred = sstate.get_left_blk4(blk4).ipred; |
| 142 | |
| 143 | let top_idx = top_pred.into_pred_idx(); |
| 144 | let left_idx = left_pred.into_pred_idx(); |
| 145 | let pred_mode = top_idx.min(left_idx); |
| 146 | let mut pred_mode = if pred_mode != -1 { pred_mode as u8 } else { 2 }; |
| 147 | if !br.read_bool()? { |
| 148 | let new_mode = br.read(3)? as u8; |
| 149 | pred_mode = if new_mode >= pred_mode { |
| 150 | new_mode + 1 |
| 151 | } else { new_mode }; |
| 152 | } |
| 153 | mb_info.ipred[blk4] = pred_mode.into(); |
| 154 | mb_info.ipred[blk4 + 1] = pred_mode.into(); |
| 155 | mb_info.ipred[blk4 + 4] = pred_mode.into(); |
| 156 | mb_info.ipred[blk4 + 5] = pred_mode.into(); |
| 157 | sstate.get_cur_blk4(blk4).ipred = pred_mode.into(); |
| 158 | sstate.get_cur_blk4(blk4 + 1).ipred = pred_mode.into(); |
| 159 | sstate.get_cur_blk4(blk4 + 4).ipred = pred_mode.into(); |
| 160 | sstate.get_cur_blk4(blk4 + 5).ipred = pred_mode.into(); |
| 161 | } |
| 162 | mb_info.chroma_ipred = br.read_ue_lim(3)? as u8; |
| 163 | }, |
| 164 | MBType::Intra16x16(_ipred, _, _) => { |
| 165 | sstate.fill_ipred(IntraPredMode::DC); |
| 166 | mb_info.chroma_ipred = br.read_ue_lim(3)? as u8; |
| 167 | }, |
| 168 | MBType::P16x16 | MBType::P16x8 | MBType::P8x16 => { |
| 169 | let nparts = mb_type.num_parts(); |
| 170 | read_refs(br, &mut mb_info.ref_l0[..nparts], num_l0)?; |
| 171 | read_mvs(br, &mut mb_info.mv_l0[..nparts])?; |
| 172 | }, |
| 173 | MBType::B16x16(mode) => { |
| 174 | if mode != BMode::L1 { |
| 175 | read_refs(br, &mut mb_info.ref_l0[..1], num_l0)?; |
| 176 | } |
| 177 | if mode != BMode::L0 { |
| 178 | read_refs(br, &mut mb_info.ref_l1[..1], num_l1)?; |
| 179 | } |
| 180 | if mode != BMode::L1 { |
| 181 | read_mvs(br, &mut mb_info.mv_l0[..1])?; |
| 182 | } |
| 183 | if mode != BMode::L0 { |
| 184 | read_mvs(br, &mut mb_info.mv_l1[..1])?; |
| 185 | } |
| 186 | }, |
| 187 | MBType::B16x8(mode0, mode1) | MBType::B8x16(mode0, mode1) => { |
| 188 | if num_l0 > 1 { |
| 189 | if mode0 != BMode::L1 { |
| 190 | read_refs(br, &mut mb_info.ref_l0[0..1], num_l0)?; |
| 191 | } |
| 192 | if mode1 != BMode::L1 { |
| 193 | read_refs(br, &mut mb_info.ref_l0[1..2], num_l0)?; |
| 194 | } |
| 195 | } |
| 196 | if num_l1 > 1 { |
| 197 | if mode0 != BMode::L0 { |
| 198 | read_refs(br, &mut mb_info.ref_l1[0..1], num_l1)?; |
| 199 | } |
| 200 | if mode1 != BMode::L0 { |
| 201 | read_refs(br, &mut mb_info.ref_l1[1..2], num_l1)?; |
| 202 | } |
| 203 | } |
| 204 | if mode0 != BMode::L1 { |
| 205 | read_mvs(br, &mut mb_info.mv_l0[0..1])?; |
| 206 | } |
| 207 | if mode1 != BMode::L1 { |
| 208 | read_mvs(br, &mut mb_info.mv_l0[1..2])?; |
| 209 | } |
| 210 | if mode0 != BMode::L0 { |
| 211 | read_mvs(br, &mut mb_info.mv_l1[0..1])?; |
| 212 | } |
| 213 | if mode1 != BMode::L0 { |
| 214 | read_mvs(br, &mut mb_info.mv_l1[1..2])?; |
| 215 | } |
| 216 | }, |
| 217 | MBType::P8x8 | MBType::P8x8Ref0 | MBType::B8x8 => { |
| 218 | for sub_mb in mb_info.sub_mb_type.iter_mut() { |
| 219 | *sub_mb = decode_sub_mb_type(br, mb_type != MBType::B8x8)?; |
| 220 | } |
| 221 | for (part, &sub_mb) in mb_info.sub_mb_type.iter().enumerate() { |
| 222 | if num_l0 > 1 && mb_type != MBType::P8x8Ref0 && sub_mb != SubMBType::Direct8x8 && !sub_mb.is_l1() { |
| 223 | read_refs(br, &mut mb_info.ref_l0[part..][..1], num_l0)?; |
| 224 | } |
| 225 | } |
| 226 | for (part, &sub_mb) in mb_info.sub_mb_type.iter().enumerate() { |
| 227 | if num_l1 > 1 && sub_mb != SubMBType::Direct8x8 && !sub_mb.is_l0() { |
| 228 | read_refs(br, &mut mb_info.ref_l1[part..][..1], num_l1)?; |
| 229 | } |
| 230 | } |
| 231 | for (part, &sub_mb) in mb_info.sub_mb_type.iter().enumerate() { |
| 232 | if sub_mb != SubMBType::Direct8x8 && !sub_mb.is_l1() { |
| 233 | let num_subparts = sub_mb.num_parts(); |
| 234 | read_mvs(br, &mut mb_info.mv_l0[part * 4..][..num_subparts])?; |
| 235 | } |
| 236 | } |
| 237 | for (part, &sub_mb) in mb_info.sub_mb_type.iter().enumerate() { |
| 238 | if sub_mb != SubMBType::Direct8x8 && !sub_mb.is_l0() { |
| 239 | let num_subparts = sub_mb.num_parts(); |
| 240 | read_mvs(br, &mut mb_info.mv_l1[part * 4..][..num_subparts])?; |
| 241 | } |
| 242 | } |
| 243 | }, |
| 244 | _ => {}, |
| 245 | }; |
| 246 | Ok(()) |
| 247 | } |
| 248 | |
| 249 | fn decode_sub_mb_type(br: &mut BitReader, is_p: bool) -> DecoderResult<SubMBType> { |
| 250 | const SUB_MB_P_TYPES: [SubMBType; 4] = [ |
| 251 | SubMBType::P8x8, SubMBType::P8x4, SubMBType::P4x8, SubMBType::P4x4 |
| 252 | ]; |
| 253 | const SUB_MB_B_TYPES: [SubMBType; 13] = [ |
| 254 | SubMBType::Direct8x8, |
| 255 | SubMBType::B8x8(BMode::L0), SubMBType::B8x8(BMode::L1), SubMBType::B8x8(BMode::Bi), |
| 256 | SubMBType::B8x4(BMode::L0), SubMBType::B4x8(BMode::L0), |
| 257 | SubMBType::B8x4(BMode::L1), SubMBType::B4x8(BMode::L1), |
| 258 | SubMBType::B8x4(BMode::Bi), SubMBType::B4x8(BMode::Bi), |
| 259 | SubMBType::B4x4(BMode::L0), SubMBType::B4x4(BMode::L1), SubMBType::B4x4(BMode::Bi), |
| 260 | ]; |
| 261 | if is_p { |
| 262 | let idx = br.read_ue_lim(SUB_MB_P_TYPES.len() as u32 - 1)? as usize; |
| 263 | Ok(SUB_MB_P_TYPES[idx]) |
| 264 | } else { |
| 265 | let idx = br.read_ue_lim(SUB_MB_B_TYPES.len() as u32 - 1)? as usize; |
| 266 | Ok(SUB_MB_B_TYPES[idx]) |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | fn map_coeff_token(val: u8) -> (usize, usize) { |
| 271 | const TRAILING_ONES: [u8; 6] = [ 0, 0, 1, 0, 1, 2 ]; |
| 272 | const TOTAL_COEFF: [u8; 6] = [0, 1, 1, 2, 2, 2]; |
| 273 | |
| 274 | if val < 6 { |
| 275 | (TRAILING_ONES[val as usize] as usize, TOTAL_COEFF[val as usize] as usize) |
| 276 | } else { |
| 277 | (((val - 6) & 3) as usize, ((val + 6) >> 2) as usize) |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | fn decode_coeffs(br: &mut BitReader, coeffs: &mut [i16], scan: &[usize], cb: &Codebook<u8>, tables: &CAVLCTables) -> DecoderResult<u8> { |
| 282 | let coeff_token = br.read_cb(cb)?; |
| 283 | let (trail_ones, total_coeff) = map_coeff_token(coeff_token); |
| 284 | let mut level = [0i16; 16]; |
| 285 | let mut run = [0u8; 16]; |
| 286 | if total_coeff > 0 { |
| 287 | let mut suffix_length = (total_coeff > 10 && trail_ones < 3) as u8; |
| 288 | for i in 0..total_coeff { |
| 289 | if i < trail_ones { |
| 290 | if !br.read_bool()? { |
| 291 | level[i] = 1; |
| 292 | } else { |
| 293 | level[i] = -1; |
| 294 | } |
| 295 | } else { |
| 296 | let level_prefix = br.read_code(UintCodeType::UnaryZeroes)?; |
| 297 | validate!(level_prefix <= 19); |
| 298 | let mut level_code = level_prefix.min(15) << suffix_length; |
| 299 | if suffix_length > 0 || level_prefix >= 14 { |
| 300 | let level_suffix_size = if level_prefix == 14 && suffix_length == 0 { |
| 301 | 4 |
| 302 | } else if level_prefix >= 15 { |
| 303 | (level_prefix - 3) as u8 |
| 304 | } else { |
| 305 | suffix_length |
| 306 | }; |
| 307 | let level_suffix = br.read(level_suffix_size)?; |
| 308 | level_code += level_suffix; |
| 309 | } |
| 310 | if level_prefix >= 15 && suffix_length == 0 { |
| 311 | level_code += 15; |
| 312 | } |
| 313 | if level_prefix >= 16 { |
| 314 | level_code += (1 << (level_prefix - 3)) - 4096; |
| 315 | } |
| 316 | if i == trail_ones && trail_ones < 3 { |
| 317 | level_code += 2; |
| 318 | } |
| 319 | level[i] = if (level_code & 1) == 0 { |
| 320 | (level_code as i32 + 2) >> 1 |
| 321 | } else { |
| 322 | -((level_code as i32 + 1) >> 1) |
| 323 | } as i16; |
| 324 | if suffix_length == 0 { |
| 325 | suffix_length = 1; |
| 326 | } |
| 327 | if level[i].abs() > (3 << (suffix_length - 1)) && suffix_length < 6 { |
| 328 | suffix_length += 1; |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | let mut zeros_left = if total_coeff < coeffs.len() { |
| 333 | let cb = if coeffs.len() > 4 { |
| 334 | &tables.total_zeros_cb[total_coeff - 1] |
| 335 | } else { |
| 336 | &tables.cdc_total_zeros_cb[total_coeff - 1] |
| 337 | }; |
| 338 | br.read_cb(cb)? |
| 339 | } else { 0 }; |
| 340 | for i in 0..total_coeff - 1 { |
| 341 | if zeros_left > 0 { |
| 342 | let run_before = br.read_cb(&tables.run_before_cb[(zeros_left - 1).min(6) as usize])?; |
| 343 | run[i] = run_before; |
| 344 | zeros_left -= run_before; |
| 345 | } |
| 346 | } |
| 347 | run[total_coeff - 1] = zeros_left; |
| 348 | let mut idx = 0; |
| 349 | for i in (0..total_coeff).rev() { |
| 350 | idx += run[i] as usize; |
| 351 | coeffs[scan[idx]] = level[i]; |
| 352 | idx += 1; |
| 353 | } |
| 354 | } |
| 355 | Ok(total_coeff as u8) |
| 356 | } |
| 357 | |
| 358 | fn decode_block(br: &mut BitReader, coeffs: &mut [i16; 16], cb: &Codebook<u8>, tables: &CAVLCTables) -> DecoderResult<u8> { |
| 359 | decode_coeffs(br, coeffs, &ZIGZAG, cb, tables) |
| 360 | } |
| 361 | |
| 362 | fn decode_block_ac(br: &mut BitReader, coeffs: &mut [i16; 16], cb: &Codebook<u8>, tables: &CAVLCTables) -> DecoderResult<u8> { |
| 363 | decode_coeffs(br, &mut coeffs[1..], &ZIGZAG1, cb, tables) |
| 364 | } |
| 365 | |
| 366 | fn decode_chroma_dc(br: &mut BitReader, coeffs: &mut [i16; 4], cb: &Codebook<u8>, tables: &CAVLCTables) -> DecoderResult<u8> { |
| 367 | decode_coeffs(br, coeffs, &CHROMA_DC_SCAN, cb, tables) |
| 368 | } |
| 369 | |
| 370 | fn get_cb_idx(nc: u8) -> usize { |
| 371 | match nc { |
| 372 | 0 | 1 => 0, |
| 373 | 2 | 3 => 1, |
| 374 | 4..=7 => 2, |
| 375 | _ => 3, |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | pub fn decode_residual_cavlc(br: &mut BitReader, sstate: &mut SliceState, mb_info: &mut CurrentMBInfo, tables: &CAVLCTables) -> DecoderResult<()> { |
| 380 | if mb_info.mb_type.is_intra16x16() { |
| 381 | let mut top_nc = sstate.get_top_blk4(0).ncoded; |
| 382 | let mut left_nc = sstate.get_left_blk4(0).ncoded; |
| 383 | if !sstate.has_left { |
| 384 | left_nc = top_nc; |
| 385 | } else if !sstate.has_top { |
| 386 | top_nc = left_nc; |
| 387 | } |
| 388 | let cb_idx = get_cb_idx((left_nc + top_nc + 1) >> 1); |
| 389 | |
| 390 | let nc = decode_block(br, &mut mb_info.coeffs[24], &tables.coeff_token_cb[cb_idx], tables)?; |
| 391 | mb_info.coded[24] = nc != 0; |
| 392 | } |
| 393 | for blk8 in 0..4 { |
| 394 | if (mb_info.cbpy & (1 << blk8)) != 0 { |
| 395 | for blk4 in 0..4 { |
| 396 | let bx = (blk8 & 1) * 2 + (blk4 & 1); |
| 397 | let by = ((blk8 & 2) * 2 + (blk4 & 2)) >> 1; |
| 398 | let blk_no = bx + by * 4; |
| 399 | |
| 400 | let mut top_nc = sstate.get_top_blk4(blk_no).ncoded; |
| 401 | let mut left_nc = sstate.get_left_blk4(blk_no).ncoded; |
| 402 | if bx == 0 && !sstate.has_left { |
| 403 | left_nc = top_nc; |
| 404 | } else if by == 0 && !sstate.has_top { |
| 405 | top_nc = left_nc; |
| 406 | } |
| 407 | let cb_idx = get_cb_idx((left_nc + top_nc + 1) >> 1); |
| 408 | |
| 409 | let nc = if mb_info.mb_type.is_intra16x16() { |
| 410 | decode_block_ac(br, &mut mb_info.coeffs[blk_no], &tables.coeff_token_cb[cb_idx], tables)? |
| 411 | } else { |
| 412 | decode_block(br, &mut mb_info.coeffs[blk_no], &tables.coeff_token_cb[cb_idx], tables)? |
| 413 | }; |
| 414 | sstate.get_cur_blk4(blk_no).ncoded = nc; |
| 415 | mb_info.coded[blk_no] = nc != 0; |
| 416 | } |
| 417 | } |
| 418 | } |
| 419 | if mb_info.transform_size_8x8 { |
| 420 | for y in 0..2 { |
| 421 | for x in 0..2 { |
| 422 | let b0 = &mb_info.coeffs[x + y * 8]; |
| 423 | let b1 = &mb_info.coeffs[x + 1 + y * 8]; |
| 424 | let b2 = &mb_info.coeffs[x + 4 + y * 8]; |
| 425 | let b3 = &mb_info.coeffs[x + 5 + y * 8]; |
| 426 | let dst = &mut mb_info.coeffs8x8[x + y * 2].coeffs; |
| 427 | for (dst, (s0, s1)) in dst.chunks_mut(8).zip(b0.chunks(4).zip(b1.chunks(4))) { |
| 428 | let (d0, d1) = dst.split_at_mut(4); |
| 429 | d0.copy_from_slice(s0); |
| 430 | d1.copy_from_slice(s1); |
| 431 | } |
| 432 | for (dst, (s0, s1)) in dst.chunks_mut(8).skip(4).zip(b2.chunks(4).zip(b3.chunks(4))) { |
| 433 | let (d0, d1) = dst.split_at_mut(4); |
| 434 | d0.copy_from_slice(s0); |
| 435 | d1.copy_from_slice(s1); |
| 436 | } |
| 437 | } |
| 438 | } |
| 439 | } |
| 440 | for chroma in 0..2 { |
| 441 | if (mb_info.cbpc & 3) != 0 { |
| 442 | decode_chroma_dc(br, &mut mb_info.chroma_dc[chroma], &tables.cdc_coeff_token_cb, tables)?; |
| 443 | } |
| 444 | } |
| 445 | for chroma in 0..2 { |
| 446 | if (mb_info.cbpc & 2) != 0 { |
| 447 | for blk4 in 0..4 { |
| 448 | let blk_no = 16 + chroma * 4 + blk4; |
| 449 | let bx = blk4 & 1; |
| 450 | let by = blk4 >> 1; |
| 451 | |
| 452 | let mut top_nc = sstate.get_top_blk8(blk4).ncoded_c[chroma]; |
| 453 | let mut left_nc = sstate.get_left_blk8(blk4).ncoded_c[chroma]; |
| 454 | if bx == 0 && !sstate.has_left { |
| 455 | left_nc = top_nc; |
| 456 | } else if by == 0 && !sstate.has_top { |
| 457 | top_nc = left_nc; |
| 458 | } |
| 459 | let cb_idx = get_cb_idx((left_nc + top_nc + 1) >> 1); |
| 460 | |
| 461 | let nc = decode_block_ac(br, &mut mb_info.coeffs[blk_no], &tables.coeff_token_cb[cb_idx], tables)?; |
| 462 | sstate.get_cur_blk8(blk4).ncoded_c[chroma] = nc; |
| 463 | mb_info.coded[blk_no] = nc != 0; |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | Ok(()) |
| 469 | } |
| 470 | |
| 471 | pub struct CAVLCTables { |
| 472 | coeff_token_cb: [Codebook<u8>; 4], |
| 473 | cdc_coeff_token_cb: Codebook<u8>, |
| 474 | total_zeros_cb: [Codebook<u8>; 15], |
| 475 | cdc_total_zeros_cb: [Codebook<u8>; 3], |
| 476 | run_before_cb: [Codebook<u8>; 7], |
| 477 | } |
| 478 | |
| 479 | fn map_idx(idx: usize) -> u8 { idx as u8 } |
| 480 | |
| 481 | macro_rules! create_cb { |
| 482 | ($bits: expr, $lens: expr) => {{ |
| 483 | let mut reader = TableCodebookDescReader::new($bits, $lens, map_idx); |
| 484 | Codebook::new(&mut reader, CodebookMode::MSB).unwrap() |
| 485 | }} |
| 486 | } |
| 487 | |
| 488 | impl CAVLCTables { |
| 489 | pub fn new() -> Self { |
| 490 | /*let mut reader = TableCodebookDescReader::new(&COEFF_TOKEN_BITS[0], &COEFF_TOKEN_LENS[0], map_idx); |
| 491 | let coef_tok_cb0 = Codebook::new(&mut reader, CodebookMode::MSB).unwrap(); |
| 492 | let mut reader = TableCodebookDescReader::new(&COEFF_TOKEN_BITS[1], &COEFF_TOKEN_LENS[1], map_idx); |
| 493 | let coef_tok_cb1 = Codebook::new(&mut reader, CodebookMode::MSB).unwrap(); |
| 494 | let mut reader = TableCodebookDescReader::new(&COEFF_TOKEN_BITS[2], &COEFF_TOKEN_LENS[2], map_idx); |
| 495 | let coef_tok_cb2 = Codebook::new(&mut reader, CodebookMode::MSB).unwrap(); |
| 496 | let mut reader = TableCodebookDescReader::new(&COEFF_TOKEN_BITS[3], &COEFF_TOKEN_LENS[3], map_idx); |
| 497 | let coef_tok_cb3 = Codebook::new(&mut reader, CodebookMode::MSB).unwrap(); |
| 498 | |
| 499 | let mut reader = TableCodebookDescReader::new(&CHROMA_DC_COEFF_TOKEN_BITS, &CHROMA_DC_COEFF_TOKEN_LENS, map_idx); |
| 500 | let cdc_coeff_token_cb = Codebook::new(&mut reader, CodebookMode::MSB).unwrap();*/ |
| 501 | |
| 502 | let coef_tok_cb0 = create_cb!(&COEFF_TOKEN_BITS[0], &COEFF_TOKEN_LENS[0]); |
| 503 | let coef_tok_cb1 = create_cb!(&COEFF_TOKEN_BITS[1], &COEFF_TOKEN_LENS[1]); |
| 504 | let coef_tok_cb2 = create_cb!(&COEFF_TOKEN_BITS[2], &COEFF_TOKEN_LENS[2]); |
| 505 | let coef_tok_cb3 = create_cb!(&COEFF_TOKEN_BITS[3], &COEFF_TOKEN_LENS[3]); |
| 506 | |
| 507 | let cdc_coeff_token_cb = create_cb!(&CHROMA_DC_COEFF_TOKEN_BITS, &CHROMA_DC_COEFF_TOKEN_LENS); |
| 508 | |
| 509 | let total_zeros0 = create_cb!(&TOTAL_ZERO_BITS[ 0], &TOTAL_ZERO_LENS[ 0]); |
| 510 | let total_zeros1 = create_cb!(&TOTAL_ZERO_BITS[ 1], &TOTAL_ZERO_LENS[ 1]); |
| 511 | let total_zeros2 = create_cb!(&TOTAL_ZERO_BITS[ 2], &TOTAL_ZERO_LENS[ 2]); |
| 512 | let total_zeros3 = create_cb!(&TOTAL_ZERO_BITS[ 3], &TOTAL_ZERO_LENS[ 3]); |
| 513 | let total_zeros4 = create_cb!(&TOTAL_ZERO_BITS[ 4], &TOTAL_ZERO_LENS[ 4]); |
| 514 | let total_zeros5 = create_cb!(&TOTAL_ZERO_BITS[ 5], &TOTAL_ZERO_LENS[ 5]); |
| 515 | let total_zeros6 = create_cb!(&TOTAL_ZERO_BITS[ 6], &TOTAL_ZERO_LENS[ 6]); |
| 516 | let total_zeros7 = create_cb!(&TOTAL_ZERO_BITS[ 7], &TOTAL_ZERO_LENS[ 7]); |
| 517 | let total_zeros8 = create_cb!(&TOTAL_ZERO_BITS[ 8], &TOTAL_ZERO_LENS[ 8]); |
| 518 | let total_zeros9 = create_cb!(&TOTAL_ZERO_BITS[ 9], &TOTAL_ZERO_LENS[ 9]); |
| 519 | let total_zeros10 = create_cb!(&TOTAL_ZERO_BITS[10], &TOTAL_ZERO_LENS[10]); |
| 520 | let total_zeros11 = create_cb!(&TOTAL_ZERO_BITS[11], &TOTAL_ZERO_LENS[11]); |
| 521 | let total_zeros12 = create_cb!(&TOTAL_ZERO_BITS[12], &TOTAL_ZERO_LENS[12]); |
| 522 | let total_zeros13 = create_cb!(&TOTAL_ZERO_BITS[13], &TOTAL_ZERO_LENS[13]); |
| 523 | let total_zeros14 = create_cb!(&TOTAL_ZERO_BITS[14], &TOTAL_ZERO_LENS[14]); |
| 524 | |
| 525 | let cdc_total_zeros_cb0 = create_cb!(&CHROMA_DC_TOTAL_ZERO_BITS[0], &CHROMA_DC_TOTAL_ZERO_LENS[0]); |
| 526 | let cdc_total_zeros_cb1 = create_cb!(&CHROMA_DC_TOTAL_ZERO_BITS[1], &CHROMA_DC_TOTAL_ZERO_LENS[1]); |
| 527 | let cdc_total_zeros_cb2 = create_cb!(&CHROMA_DC_TOTAL_ZERO_BITS[2], &CHROMA_DC_TOTAL_ZERO_LENS[2]); |
| 528 | |
| 529 | let run_before_cb0 = create_cb!(&RUN_BEFORE_BITS[0], &RUN_BEFORE_LENS[0]); |
| 530 | let run_before_cb1 = create_cb!(&RUN_BEFORE_BITS[1], &RUN_BEFORE_LENS[1]); |
| 531 | let run_before_cb2 = create_cb!(&RUN_BEFORE_BITS[2], &RUN_BEFORE_LENS[2]); |
| 532 | let run_before_cb3 = create_cb!(&RUN_BEFORE_BITS[3], &RUN_BEFORE_LENS[3]); |
| 533 | let run_before_cb4 = create_cb!(&RUN_BEFORE_BITS[4], &RUN_BEFORE_LENS[4]); |
| 534 | let run_before_cb5 = create_cb!(&RUN_BEFORE_BITS[5], &RUN_BEFORE_LENS[5]); |
| 535 | let run_before_cb6 = create_cb!(&RUN_BEFORE_BITS[6], &RUN_BEFORE_LENS[6]); |
| 536 | |
| 537 | Self { |
| 538 | coeff_token_cb: [coef_tok_cb0, coef_tok_cb1, coef_tok_cb2, coef_tok_cb3], |
| 539 | cdc_coeff_token_cb, |
| 540 | total_zeros_cb: [total_zeros0, total_zeros1, total_zeros2, |
| 541 | total_zeros3, total_zeros4, total_zeros5, |
| 542 | total_zeros6, total_zeros7, total_zeros8, |
| 543 | total_zeros9, total_zeros10, total_zeros11, |
| 544 | total_zeros12, total_zeros13, total_zeros14 ], |
| 545 | cdc_total_zeros_cb: [cdc_total_zeros_cb0, cdc_total_zeros_cb1, cdc_total_zeros_cb2], |
| 546 | run_before_cb: [ run_before_cb0, run_before_cb1, run_before_cb2, |
| 547 | run_before_cb3, run_before_cb4, run_before_cb5, |
| 548 | run_before_cb6 ], |
| 549 | } |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | const COEFF_TOKEN_BITS: [[u16; 62]; 4] = [ |
| 554 | [ |
| 555 | 0x01, 0x05, 0x01, 0x07, 0x04, 0x01, 0x07, 0x06, |
| 556 | 0x05, 0x03, 0x07, 0x06, 0x05, 0x03, 0x07, 0x06, |
| 557 | 0x05, 0x04, 0x0F, 0x06, 0x05, 0x04, 0x0B, 0x0E, |
| 558 | 0x05, 0x04, 0x08, 0x0A, 0x0D, 0x04, 0x0F, 0x0E, |
| 559 | 0x09, 0x04, 0x0B, 0x0A, 0x0D, 0x0C, 0x0F, 0x0E, |
| 560 | 0x09, 0x0C, 0x0B, 0x0A, 0x0D, 0x08, 0x0F, 0x01, |
| 561 | 0x09, 0x0C, 0x0B, 0x0E, 0x0D, 0x08, 0x07, 0x0A, |
| 562 | 0x09, 0x0C, 0x04, 0x06, 0x05, 0x08 |
| 563 | ], [ |
| 564 | 0x03, 0x0B, 0x02, 0x07, 0x07, 0x03, 0x07, 0x0A, |
| 565 | 0x09, 0x05, 0x07, 0x06, 0x05, 0x04, 0x04, 0x06, |
| 566 | 0x05, 0x06, 0x07, 0x06, 0x05, 0x08, 0x0F, 0x06, |
| 567 | 0x05, 0x04, 0x0B, 0x0E, 0x0D, 0x04, 0x0F, 0x0A, |
| 568 | 0x09, 0x04, 0x0B, 0x0E, 0x0D, 0x0C, 0x08, 0x0A, |
| 569 | 0x09, 0x08, 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, |
| 570 | 0x09, 0x0C, 0x07, 0x0B, 0x06, 0x08, 0x09, 0x08, |
| 571 | 0x0A, 0x01, 0x07, 0x06, 0x05, 0x04 |
| 572 | ], [ |
| 573 | 0x0F, 0x0F, 0x0E, 0x0B, 0x0F, 0x0D, 0x08, 0x0C, |
| 574 | 0x0E, 0x0C, 0x0F, 0x0A, 0x0B, 0x0B, 0x0B, 0x08, |
| 575 | 0x09, 0x0A, 0x09, 0x0E, 0x0D, 0x09, 0x08, 0x0A, |
| 576 | 0x09, 0x08, 0x0F, 0x0E, 0x0D, 0x0D, 0x0B, 0x0E, |
| 577 | 0x0A, 0x0C, 0x0F, 0x0A, 0x0D, 0x0C, 0x0B, 0x0E, |
| 578 | 0x09, 0x0C, 0x08, 0x0A, 0x0D, 0x08, 0x0D, 0x07, |
| 579 | 0x09, 0x0C, 0x09, 0x0C, 0x0B, 0x0A, 0x05, 0x08, |
| 580 | 0x07, 0x06, 0x01, 0x04, 0x03, 0x02 |
| 581 | ], [ |
| 582 | 0x03, 0x00, 0x01, 0x04, 0x05, 0x06, 0x08, 0x09, |
| 583 | 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, |
| 584 | 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, |
| 585 | 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, |
| 586 | 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, |
| 587 | 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, |
| 588 | 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, |
| 589 | 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F |
| 590 | ] |
| 591 | ]; |
| 592 | const COEFF_TOKEN_LENS: [[u8; 62]; 4] = [ |
| 593 | [ |
| 594 | 1, 6, 2, 8, 6, 3, 9, 8, 7, 5, 10, 9, 8, 6, 11, 10, |
| 595 | 9, 7, 13, 11, 10, 8, 13, 13, 11, 9, 13, 13, 13, 10, 14, 14, |
| 596 | 13, 11, 14, 14, 14, 13, 15, 15, 14, 14, 15, 15, 15, 14, 16, 15, |
| 597 | 15, 15, 16, 16, 16, 15, 16, 16, 16, 16, 16, 16, 16, 16 |
| 598 | ], [ |
| 599 | 2, 6, 2, 6, 5, 3, 7, 6, 6, 4, 8, 6, 6, 4, 8, 7, |
| 600 | 7, 5, 9, 8, 8, 6, 11, 9, 9, 6, 11, 11, 11, 7, 12, 11, |
| 601 | 11, 9, 12, 12, 12, 11, 12, 12, 12, 11, 13, 13, 13, 12, 13, 13, |
| 602 | 13, 13, 13, 14, 13, 13, 14, 14, 14, 13, 14, 14, 14, 14 |
| 603 | ], [ |
| 604 | 4, 6, 4, 6, 5, 4, 6, 5, 5, 4, 7, 5, 5, 4, 7, 5, |
| 605 | 5, 4, 7, 6, 6, 4, 7, 6, 6, 4, 8, 7, 7, 5, 8, 8, |
| 606 | 7, 6, 9, 8, 8, 7, 9, 9, 8, 8, 9, 9, 9, 8, 10, 9, |
| 607 | 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 |
| 608 | ], [ 6; 62 ] |
| 609 | ]; |
| 610 | |
| 611 | const CHROMA_DC_COEFF_TOKEN_BITS: [u8; 14] = [ |
| 612 | 1, 7, 1, 4, 6, 1, 3, 3, 2, 5, 2, 3, 2, 0 |
| 613 | ]; |
| 614 | const CHROMA_DC_COEFF_TOKEN_LENS: [u8; 14] = [ |
| 615 | 2, 6, 1, 6, 6, 3, 6, 7, 7, 6, 6, 8, 8, 7 |
| 616 | ]; |
| 617 | |
| 618 | const TOTAL_ZERO_BITS: [[u8; 16]; 15] = [ |
| 619 | [ 1, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 1 ], |
| 620 | [ 7, 6, 5, 4, 3, 5, 4, 3, 2, 3, 2, 3, 2, 1, 0, 0 ], |
| 621 | [ 5, 7, 6, 5, 4, 3, 4, 3, 2, 3, 2, 1, 1, 0, 0, 0 ], |
| 622 | [ 3, 7, 5, 4, 6, 5, 4, 3, 3, 2, 2, 1, 0, 0, 0, 0 ], |
| 623 | [ 5, 4, 3, 7, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0 ], |
| 624 | [ 1, 1, 7, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0 ], |
| 625 | [ 1, 1, 5, 4, 3, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0 ], |
| 626 | [ 1, 1, 1, 3, 3, 2, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 627 | [ 1, 0, 1, 3, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 628 | [ 1, 0, 1, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 629 | [ 0, 1, 1, 2, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 630 | [ 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 631 | [ 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 632 | [ 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 633 | [ 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ] |
| 634 | ]; |
| 635 | const TOTAL_ZERO_LENS: [[u8; 16]; 15] = [ |
| 636 | [ 1, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 9 ], |
| 637 | [ 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 0 ], |
| 638 | [ 4, 3, 3, 3, 4, 4, 3, 3, 4, 5, 5, 6, 5, 6, 0, 0 ], |
| 639 | [ 5, 3, 4, 4, 3, 3, 3, 4, 3, 4, 5, 5, 5, 0, 0, 0 ], |
| 640 | [ 4, 4, 4, 3, 3, 3, 3, 3, 4, 5, 4, 5, 0, 0, 0, 0 ], |
| 641 | [ 6, 5, 3, 3, 3, 3, 3, 3, 4, 3, 6, 0, 0, 0, 0, 0 ], |
| 642 | [ 6, 5, 3, 3, 3, 2, 3, 4, 3, 6, 0, 0, 0, 0, 0, 0 ], |
| 643 | [ 6, 4, 5, 3, 2, 2, 3, 3, 6, 0, 0, 0, 0, 0, 0, 0 ], |
| 644 | [ 6, 6, 4, 2, 2, 3, 2, 5, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 645 | [ 5, 5, 3, 2, 2, 2, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 646 | [ 4, 4, 3, 3, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 647 | [ 4, 4, 2, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 648 | [ 3, 3, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 649 | [ 2, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 650 | [ 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ] |
| 651 | ]; |
| 652 | |
| 653 | const CHROMA_DC_TOTAL_ZERO_BITS: [[u8; 4]; 3] = [ |
| 654 | [ 1, 1, 1, 0 ], [ 1, 1, 0, 0 ], [ 1, 0, 0, 0 ] |
| 655 | ]; |
| 656 | const CHROMA_DC_TOTAL_ZERO_LENS: [[u8; 4]; 3] = [ |
| 657 | [ 1, 2, 3, 3 ], [ 1, 2, 2, 0 ], [ 1, 1, 0, 0 ] |
| 658 | ]; |
| 659 | |
| 660 | const RUN_BEFORE_BITS: [[u8; 15]; 7] = [ |
| 661 | [ 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 662 | [ 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 663 | [ 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 664 | [ 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 665 | [ 3, 2, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 666 | [ 3, 0, 1, 3, 2, 5, 4, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 667 | [ 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 ] |
| 668 | ]; |
| 669 | const RUN_BEFORE_LENS: [[u8; 15]; 7] = [ |
| 670 | [ 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 671 | [ 1, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 672 | [ 2, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 673 | [ 2, 2, 2, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 674 | [ 2, 2, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 675 | [ 2, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0 ], |
| 676 | [ 3, 3, 3, 3, 3, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11 ] |
| 677 | ]; |