| 1 | use nihav_core::codecs::*; |
| 2 | use nihav_core::io::byteio::*; |
| 3 | |
| 4 | #[derive(Default)] |
| 5 | struct Decryptor { |
| 6 | key: [u8; 4], |
| 7 | } |
| 8 | |
| 9 | impl Decryptor { |
| 10 | fn decrypt(&mut self, buf: &mut [u8]) { |
| 11 | let mut pos: u8 = 0; |
| 12 | for el in buf.iter_mut() { |
| 13 | *el ^= self.key[(pos & 3) as usize]; |
| 14 | pos = pos.wrapping_add(1); |
| 15 | } |
| 16 | } |
| 17 | fn set_state(&mut self, mut key: u32) { |
| 18 | for _ in 0..3 { |
| 19 | let bit31 = (key >> 31) & 1; |
| 20 | let bit21 = (key >> 21) & 1; |
| 21 | let bit01 = (key >> 1) & 1; |
| 22 | let nbit0 = !key & 1; |
| 23 | key = (key << 1) | (bit31 ^ bit21 ^ bit01 ^ nbit0); |
| 24 | } |
| 25 | for i in 0..4 { |
| 26 | self.key[i] = (key >> (8 * (i ^ 3))) as u8; |
| 27 | } |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | struct Deltas { |
| 32 | tabs: [[i16; 256]; 2], |
| 33 | codebook: [[u8; 8]; 256], |
| 34 | num_elems: [usize; 256], |
| 35 | num_vq: usize, |
| 36 | vq_idx: usize, |
| 37 | vq_pos: usize, |
| 38 | vq_esc: u8, |
| 39 | } |
| 40 | |
| 41 | impl Deltas { |
| 42 | fn reset(&mut self, br: &mut ByteReader) -> DecoderResult<()> { |
| 43 | let b = br.read_byte()? as usize; |
| 44 | self.vq_idx = b; |
| 45 | self.vq_pos = 0; |
| 46 | Ok(()) |
| 47 | } |
| 48 | fn get_val(&mut self, br: &mut ByteReader) -> DecoderResult<u8> { |
| 49 | if self.vq_idx > self.codebook.len() { return Err(DecoderError::ShortData); } |
| 50 | let ret = self.codebook[self.vq_idx][self.vq_pos]; |
| 51 | self.vq_pos += 1; |
| 52 | if self.vq_pos == self.num_elems[self.vq_idx] { |
| 53 | if br.left() > 0 { |
| 54 | self.reset(br)?; |
| 55 | } else { |
| 56 | self.vq_idx = self.codebook.len() + 1; |
| 57 | } |
| 58 | } |
| 59 | Ok(ret) |
| 60 | } |
| 61 | fn remap(val: u16) -> i16 { |
| 62 | let hval = (val >> 1) as i16; |
| 63 | if (val & 1) == 0 { |
| 64 | hval |
| 65 | } else { |
| 66 | -1 - hval |
| 67 | } |
| 68 | } |
| 69 | fn get_int(&mut self, br: &mut ByteReader) -> DecoderResult<i16> { |
| 70 | let b = self.get_val(br)?; |
| 71 | if b != self.vq_esc - 1 { |
| 72 | return Ok(Self::remap(b as u16)); |
| 73 | } |
| 74 | let mut run = 0; |
| 75 | let mut val; |
| 76 | let mut pow = self.vq_esc as u16; |
| 77 | loop { |
| 78 | let b = self.get_val(br)?; |
| 79 | run += 1; |
| 80 | if b != self.vq_esc - 1 { |
| 81 | val = (b as u16) * pow; |
| 82 | break; |
| 83 | } |
| 84 | pow *= self.vq_esc as u16; |
| 85 | } |
| 86 | |
| 87 | for _ in 0..run { |
| 88 | pow /= self.vq_esc as u16; |
| 89 | let b = self.get_val(br)? as u16; |
| 90 | val += pow * (b as u16); |
| 91 | } |
| 92 | Ok(Self::remap(val)) |
| 93 | } |
| 94 | fn get_dy(&mut self, br: &mut ByteReader) -> DecoderResult<i16> { |
| 95 | let b = self.get_val(br)?; |
| 96 | Ok(self.tabs[1][b as usize]) |
| 97 | } |
| 98 | fn get_dc(&mut self, br: &mut ByteReader) -> DecoderResult<i16> { |
| 99 | let b = self.get_val(br)?; |
| 100 | Ok(self.tabs[0][b as usize]) |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | impl Default for Deltas { |
| 105 | fn default() -> Self { |
| 106 | Self { |
| 107 | tabs: [[0; 256]; 2], |
| 108 | codebook: [[0; 8]; 256], |
| 109 | num_elems: [0; 256], |
| 110 | num_vq: 0, |
| 111 | vq_idx: 0, |
| 112 | vq_pos: 0, |
| 113 | vq_esc: 0, |
| 114 | } |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | #[derive(Clone,Copy, Default)] |
| 119 | struct BlkInfo { |
| 120 | btype: u8, |
| 121 | mode: u8, |
| 122 | mv_x: i16, |
| 123 | mv_y: i16, |
| 124 | } |
| 125 | |
| 126 | const NUM_CPARAMS: usize = 25; |
| 127 | const CPARAM_NONE: u8 = 42; |
| 128 | const CPARAM_MISSING: u8 = 42 * 2; |
| 129 | const CPARAM_MV: u8 = 42 * 3; |
| 130 | |
| 131 | macro_rules! apply_delta { |
| 132 | ($buf:expr, $off:expr, $stride:expr, $hpred: expr, $delta:expr) => { |
| 133 | $hpred = $hpred.wrapping_add($delta); |
| 134 | $buf[$off] = $buf[$off - $stride].wrapping_add($hpred); |
| 135 | }; |
| 136 | } |
| 137 | macro_rules! copy_line { |
| 138 | ($buf:expr, $off:expr, $stride:expr) => { |
| 139 | for i in 0..8 { |
| 140 | $buf[$off + i] = $buf[$off + i - $stride]; |
| 141 | } |
| 142 | }; |
| 143 | } |
| 144 | |
| 145 | #[derive(Default)] |
| 146 | struct Frame { |
| 147 | ydata: Vec<i16>, |
| 148 | udata: Vec<i16>, |
| 149 | vdata: Vec<i16>, |
| 150 | stride: usize, |
| 151 | } |
| 152 | |
| 153 | impl Frame { |
| 154 | fn resize(&mut self, w: usize, h: usize) { |
| 155 | self.stride = w; |
| 156 | self.ydata.resize(self.stride * (h + 1), 0x80); |
| 157 | self.udata.resize(self.stride * (h + 1), 0x80); |
| 158 | self.vdata.resize(self.stride * (h + 1), 0x80); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | #[derive(Default)] |
| 163 | struct TM2XDecoder { |
| 164 | info: NACodecInfoRef, |
| 165 | width: usize, |
| 166 | height: usize, |
| 167 | dec_buf: Vec<u8>, |
| 168 | version: u8, |
| 169 | is_intra: bool, |
| 170 | deltas: Deltas, |
| 171 | blk_info: Vec<BlkInfo>, |
| 172 | tile_size: usize, |
| 173 | cparams: [[u8; 8]; NUM_CPARAMS], |
| 174 | cur_frame: Frame, |
| 175 | ref_frame: Frame, |
| 176 | } |
| 177 | |
| 178 | impl TM2XDecoder { |
| 179 | fn new() -> Self { Self::default() } |
| 180 | fn output_frame(&mut self, buf: &mut NAVideoBuffer<u8>) { |
| 181 | let mut offs = [ buf.get_offset(0), buf.get_offset(1), buf.get_offset(2) ]; |
| 182 | let strides = [ buf.get_stride(0), buf.get_stride(1), buf.get_stride(2) ]; |
| 183 | let data = buf.get_data_mut().unwrap(); |
| 184 | let dst = data.as_mut_slice(); |
| 185 | |
| 186 | let mut pos = self.cur_frame.stride; |
| 187 | for _y in 0..self.height { |
| 188 | for x in 0..self.width { |
| 189 | let y = self.cur_frame.ydata[pos + x]; |
| 190 | let u = self.cur_frame.udata[pos + x]; |
| 191 | let v = self.cur_frame.vdata[pos + x]; |
| 192 | dst[offs[0] + x] = y.max(0).min(255) as u8; |
| 193 | dst[offs[1] + x] = u.max(0).min(255) as u8; |
| 194 | dst[offs[2] + x] = v.max(0).min(255) as u8; |
| 195 | } |
| 196 | for c in 0..3 { |
| 197 | offs[c] += strides[c]; |
| 198 | } |
| 199 | pos += self.cur_frame.stride; |
| 200 | } |
| 201 | } |
| 202 | fn parse_init(&mut self, version: u8) -> DecoderResult<()> { |
| 203 | self.version = version; |
| 204 | |
| 205 | let mut mr = MemoryReader::new_read(&self.dec_buf); |
| 206 | let mut br = ByteReader::new(&mut mr); |
| 207 | if version > 4 { |
| 208 | let _smth = br.read_u32be()?; |
| 209 | } |
| 210 | let height = br.read_u16be()? as usize; |
| 211 | let width = br.read_u16be()? as usize; |
| 212 | validate!(width == self.width && height == self.height); |
| 213 | if version > 4 { |
| 214 | let _smth = br.read_u32be()?; |
| 215 | } |
| 216 | let _smth = br.read_byte()?; |
| 217 | let _nfuncs = br.read_byte()? as usize; |
| 218 | let _smth = br.read_u16be()? as usize; |
| 219 | let has_mv = br.read_byte()?; |
| 220 | self.is_intra = has_mv == 0; |
| 221 | if version >= 4 { |
| 222 | let _flags = br.read_u16be()?; |
| 223 | let id_len = br.read_byte()? as usize; |
| 224 | br.read_skip(id_len)?; |
| 225 | let _smth1 = br.read_byte()?; |
| 226 | let len = br.read_byte()? as usize; |
| 227 | br.read_skip(len)?; |
| 228 | let _smth = br.read_u32be()?; |
| 229 | } |
| 230 | |
| 231 | Ok(()) |
| 232 | } |
| 233 | fn parse_tabs(&mut self) -> DecoderResult<()> { |
| 234 | let mut mr = MemoryReader::new_read(&self.dec_buf); |
| 235 | let mut br = ByteReader::new(&mut mr); |
| 236 | |
| 237 | let idx = br.read_byte()? as usize; |
| 238 | validate!(idx < self.deltas.tabs.len()); |
| 239 | let len = br.read_byte()? as usize; |
| 240 | validate!(((len * 2) as i64) == br.left()); |
| 241 | for i in 0..len { |
| 242 | self.deltas.tabs[idx][i] = br.read_u16be()? as i16; |
| 243 | } |
| 244 | |
| 245 | Ok(()) |
| 246 | } |
| 247 | fn parse_cb_desc(&mut self, version: u8) -> DecoderResult<()> { |
| 248 | let mut mr = MemoryReader::new_read(&self.dec_buf); |
| 249 | let mut br = ByteReader::new(&mut mr); |
| 250 | |
| 251 | if version == 0x0A { |
| 252 | self.deltas.vq_esc = br.read_byte()?; |
| 253 | validate!(self.deltas.vq_esc > 1); |
| 254 | let _tag = br.read_u16be()?; |
| 255 | } |
| 256 | let len = br.read_u16be()? as usize; |
| 257 | validate!(len + 3 == (br.left() as usize)); |
| 258 | let num_entries = br.read_u16be()?; |
| 259 | validate!(num_entries == 256); |
| 260 | let max_elems = br.read_byte()?; |
| 261 | validate!(max_elems > 0 && max_elems <= 8); |
| 262 | let mut idx = 0; |
| 263 | while br.left() > 0 { |
| 264 | validate!(idx < self.deltas.codebook.len()); |
| 265 | let num_elems = br.read_byte()? as usize; |
| 266 | validate!(num_elems <= 8); |
| 267 | self.deltas.num_elems[idx] = num_elems; |
| 268 | for i in 0..num_elems { |
| 269 | self.deltas.codebook[idx][i] = br.read_byte()?; |
| 270 | } |
| 271 | idx += 1; |
| 272 | } |
| 273 | validate!(idx == 256); |
| 274 | self.deltas.num_vq = idx; |
| 275 | Ok(()) |
| 276 | } |
| 277 | |
| 278 | fn decode_frame(&mut self, src: &[u8]) -> DecoderResult<()> { |
| 279 | let mut mr = MemoryReader::new_read(src); |
| 280 | let mut br = ByteReader::new(&mut mr); |
| 281 | |
| 282 | self.deltas.reset(&mut br)?; |
| 283 | let bw = self.width / 8; |
| 284 | let bh = self.height / 8; |
| 285 | let ntiles = (bw + self.tile_size - 1) / self.tile_size; |
| 286 | let mut pos = self.cur_frame.stride; |
| 287 | let ydata = &mut self.cur_frame.ydata; |
| 288 | let udata = &mut self.cur_frame.udata; |
| 289 | let vdata = &mut self.cur_frame.vdata; |
| 290 | let stride = self.cur_frame.stride; |
| 291 | for by in 0..bh { |
| 292 | for tile in 0..ntiles { |
| 293 | let xpos = tile * self.tile_size; |
| 294 | let len = self.tile_size.min(bw - xpos); |
| 295 | let mut last_x = 0; |
| 296 | let mut last_y = 0; |
| 297 | for el in self.blk_info.iter_mut().take(len) { |
| 298 | let t1 = self.deltas.get_val(&mut br)?; |
| 299 | let t2 = self.deltas.get_val(&mut br)?; |
| 300 | validate!((t1 as usize) < NUM_CPARAMS); |
| 301 | validate!(self.cparams[t1 as usize][0] != CPARAM_MISSING); |
| 302 | el.btype = t1; |
| 303 | el.mode = t2; |
| 304 | if t2 > 0 { |
| 305 | el.mv_x = self.deltas.get_int(&mut br)?; |
| 306 | el.mv_y = self.deltas.get_int(&mut br)?; |
| 307 | last_x = el.mv_x; |
| 308 | last_y = el.mv_y; |
| 309 | } else { |
| 310 | el.mv_x = last_x; |
| 311 | el.mv_y = last_y; |
| 312 | } |
| 313 | } |
| 314 | for line in 0..8 { |
| 315 | let mut ypred = 0i16; |
| 316 | let mut upred = 0i16; |
| 317 | let mut vpred = 0i16; |
| 318 | for x in 0..len { |
| 319 | let bx = xpos + x; |
| 320 | let op = self.cparams[self.blk_info[x].btype as usize][line]; |
| 321 | let cur_off = pos + bx * 8 + line * stride; |
| 322 | match op { |
| 323 | 0 => { // y4|y4 |
| 324 | for i in 0..8 { |
| 325 | let delta = self.deltas.get_dy(&mut br)?; |
| 326 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 327 | } |
| 328 | copy_line!(udata, cur_off, stride); |
| 329 | copy_line!(vdata, cur_off, stride); |
| 330 | upred = 0; |
| 331 | vpred = 0; |
| 332 | }, |
| 333 | 1 => { // y2|y2 |
| 334 | for i in 0..8 { |
| 335 | if (i & 1) == 0 { |
| 336 | let delta = self.deltas.get_dy(&mut br)?; |
| 337 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 338 | } else { |
| 339 | ydata[cur_off + i] = ydata[cur_off + i - 1]; |
| 340 | } |
| 341 | } |
| 342 | copy_line!(udata, cur_off, stride); |
| 343 | copy_line!(vdata, cur_off, stride); |
| 344 | upred = 0; |
| 345 | vpred = 0; |
| 346 | }, |
| 347 | 2 => { // y1|y1 |
| 348 | for i in 0..8 { |
| 349 | if (i & 3) == 0 { |
| 350 | let delta = self.deltas.get_dy(&mut br)?; |
| 351 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 352 | } else { |
| 353 | ydata[cur_off + i] = ydata[cur_off + i - 1]; |
| 354 | } |
| 355 | } |
| 356 | copy_line!(udata, cur_off, stride); |
| 357 | copy_line!(vdata, cur_off, stride); |
| 358 | upred = 0; |
| 359 | vpred = 0; |
| 360 | }, |
| 361 | 3 => { // y1|0 |
| 362 | let delta = self.deltas.get_dy(&mut br)?; |
| 363 | apply_delta!(ydata, cur_off, stride, ypred, delta); |
| 364 | for i in 1..8 { |
| 365 | ydata[cur_off + i] = ydata[cur_off]; |
| 366 | } |
| 367 | copy_line!(udata, cur_off, stride); |
| 368 | copy_line!(vdata, cur_off, stride); |
| 369 | upred = 0; |
| 370 | vpred = 0; |
| 371 | }, |
| 372 | 4 => { // c2y2c2y2|c2y2c2y2 |
| 373 | for i in (0..8).step_by(2) { |
| 374 | let delta = self.deltas.get_dc(&mut br)?; |
| 375 | apply_delta!(udata, cur_off + i + 0, stride, upred, delta); |
| 376 | udata[cur_off + i + 1] = udata[cur_off + i]; |
| 377 | let delta = self.deltas.get_dc(&mut br)?; |
| 378 | apply_delta!(vdata, cur_off + i + 0, stride, vpred, delta); |
| 379 | vdata[cur_off + i + 1] = vdata[cur_off + i]; |
| 380 | let delta = self.deltas.get_dy(&mut br)?; |
| 381 | apply_delta!(ydata, cur_off + i + 0, stride, ypred, delta); |
| 382 | let delta = self.deltas.get_dy(&mut br)?; |
| 383 | apply_delta!(ydata, cur_off + i + 1, stride, ypred, delta); |
| 384 | } |
| 385 | }, |
| 386 | 5 => { // c2y1|c2y1 |
| 387 | for i in 0..8 { |
| 388 | if (i & 3) == 0 { |
| 389 | let delta = self.deltas.get_dc(&mut br)?; |
| 390 | apply_delta!(udata, cur_off + i, stride, upred, delta); |
| 391 | let delta = self.deltas.get_dc(&mut br)?; |
| 392 | apply_delta!(vdata, cur_off + i, stride, vpred, delta); |
| 393 | let delta = self.deltas.get_dy(&mut br)?; |
| 394 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 395 | } else { |
| 396 | udata[cur_off + i] = udata[cur_off + i - 1]; |
| 397 | vdata[cur_off + i] = vdata[cur_off + i - 1]; |
| 398 | ydata[cur_off + i] = ydata[cur_off + i - 1]; |
| 399 | } |
| 400 | } |
| 401 | }, |
| 402 | 6 | 7 => unreachable!(), |
| 403 | 8 => { // c2y4|c2y4 |
| 404 | for i in 0..8 { |
| 405 | if (i & 3) == 0 { |
| 406 | let delta = self.deltas.get_dc(&mut br)?; |
| 407 | apply_delta!(udata, cur_off + i, stride, upred, delta); |
| 408 | let delta = self.deltas.get_dc(&mut br)?; |
| 409 | apply_delta!(vdata, cur_off + i, stride, vpred, delta); |
| 410 | } else { |
| 411 | udata[cur_off + i] = udata[cur_off + i - 1]; |
| 412 | vdata[cur_off + i] = vdata[cur_off + i - 1]; |
| 413 | } |
| 414 | let delta = self.deltas.get_dy(&mut br)?; |
| 415 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 416 | } |
| 417 | }, |
| 418 | 9 => { // c2y2|c2y2 |
| 419 | for i in 0..8 { |
| 420 | if (i & 3) == 0 { |
| 421 | let delta = self.deltas.get_dc(&mut br)?; |
| 422 | apply_delta!(udata, cur_off + i, stride, upred, delta); |
| 423 | let delta = self.deltas.get_dc(&mut br)?; |
| 424 | apply_delta!(vdata, cur_off + i, stride, vpred, delta); |
| 425 | } else { |
| 426 | udata[cur_off + i] = udata[cur_off + i - 1]; |
| 427 | vdata[cur_off + i] = vdata[cur_off + i - 1]; |
| 428 | } |
| 429 | if (i & 1) == 0 { |
| 430 | let delta = self.deltas.get_dy(&mut br)?; |
| 431 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 432 | } else { |
| 433 | ydata[cur_off + i] = ydata[cur_off + i - 1]; |
| 434 | } |
| 435 | } |
| 436 | }, |
| 437 | 10 => { // c2y1|c2y1 |
| 438 | for i in 0..8 { |
| 439 | if (i & 3) == 0 { |
| 440 | let delta = self.deltas.get_dc(&mut br)?; |
| 441 | apply_delta!(udata, cur_off + i, stride, upred, delta); |
| 442 | let delta = self.deltas.get_dc(&mut br)?; |
| 443 | apply_delta!(vdata, cur_off + i, stride, vpred, delta); |
| 444 | let delta = self.deltas.get_dy(&mut br)?; |
| 445 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 446 | } else { |
| 447 | udata[cur_off + i] = udata[cur_off + i - 1]; |
| 448 | vdata[cur_off + i] = vdata[cur_off + i - 1]; |
| 449 | ydata[cur_off + i] = ydata[cur_off + i - 1]; |
| 450 | } |
| 451 | } |
| 452 | }, |
| 453 | 11 => unreachable!(), |
| 454 | 12 => { // c2y8 |
| 455 | for i in 0..8 { |
| 456 | if i == 0 { |
| 457 | let delta = self.deltas.get_dc(&mut br)?; |
| 458 | apply_delta!(udata, cur_off + i, stride, upred, delta); |
| 459 | let delta = self.deltas.get_dc(&mut br)?; |
| 460 | apply_delta!(vdata, cur_off + i, stride, vpred, delta); |
| 461 | } else { |
| 462 | udata[cur_off + i] = udata[cur_off + i - 1]; |
| 463 | vdata[cur_off + i] = vdata[cur_off + i - 1]; |
| 464 | } |
| 465 | let delta = self.deltas.get_dy(&mut br)?; |
| 466 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 467 | } |
| 468 | }, |
| 469 | 13 => { // c2y4 |
| 470 | for i in 0..8 { |
| 471 | if i == 0 { |
| 472 | let delta = self.deltas.get_dc(&mut br)?; |
| 473 | apply_delta!(udata, cur_off + i, stride, upred, delta); |
| 474 | let delta = self.deltas.get_dc(&mut br)?; |
| 475 | apply_delta!(vdata, cur_off + i, stride, vpred, delta); |
| 476 | } else { |
| 477 | udata[cur_off + i] = udata[cur_off + i - 1]; |
| 478 | vdata[cur_off + i] = vdata[cur_off + i - 1]; |
| 479 | } |
| 480 | if (i & 1) == 0 { |
| 481 | let delta = self.deltas.get_dy(&mut br)?; |
| 482 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 483 | } else { |
| 484 | ydata[cur_off + i] = ydata[cur_off + i - 1]; |
| 485 | } |
| 486 | } |
| 487 | }, |
| 488 | 14 => { // c2y2 |
| 489 | for i in 0..8 { |
| 490 | if i == 0 { |
| 491 | let delta = self.deltas.get_dc(&mut br)?; |
| 492 | apply_delta!(udata, cur_off + i, stride, upred, delta); |
| 493 | let delta = self.deltas.get_dc(&mut br)?; |
| 494 | apply_delta!(vdata, cur_off + i, stride, vpred, delta); |
| 495 | } else { |
| 496 | udata[cur_off + i] = udata[cur_off + i - 1]; |
| 497 | vdata[cur_off + i] = vdata[cur_off + i - 1]; |
| 498 | } |
| 499 | if (i & 3) == 0 { |
| 500 | let delta = self.deltas.get_dy(&mut br)?; |
| 501 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 502 | } else { |
| 503 | ydata[cur_off + i] = ydata[cur_off + i - 1]; |
| 504 | } |
| 505 | } |
| 506 | }, |
| 507 | 15 => { // c2y1 |
| 508 | for i in 0..8 { |
| 509 | if i == 0 { |
| 510 | let delta = self.deltas.get_dc(&mut br)?; |
| 511 | apply_delta!(udata, cur_off + i, stride, upred, delta); |
| 512 | let delta = self.deltas.get_dc(&mut br)?; |
| 513 | apply_delta!(vdata, cur_off + i, stride, vpred, delta); |
| 514 | let delta = self.deltas.get_dy(&mut br)?; |
| 515 | apply_delta!(ydata, cur_off + i, stride, ypred, delta); |
| 516 | } else { |
| 517 | udata[cur_off + i] = udata[cur_off + i - 1]; |
| 518 | vdata[cur_off + i] = vdata[cur_off + i - 1]; |
| 519 | ydata[cur_off + i] = ydata[cur_off + i - 1]; |
| 520 | } |
| 521 | } |
| 522 | }, |
| 523 | CPARAM_NONE => { |
| 524 | copy_line!(ydata, cur_off, stride); |
| 525 | copy_line!(udata, cur_off, stride); |
| 526 | copy_line!(vdata, cur_off, stride); |
| 527 | ypred = 0; |
| 528 | upred = 0; |
| 529 | vpred = 0; |
| 530 | }, |
| 531 | CPARAM_MV => { |
| 532 | let src_x = (bx as i16) * 8 + self.blk_info[x].mv_x; |
| 533 | let src_y = ((by * 8 + line) as i16) + self.blk_info[x].mv_y; |
| 534 | validate!(src_x >= 0 && (src_x as usize) + 8 <= self.width); |
| 535 | validate!(src_y >= 0 && (src_y as usize) + 1 <= self.height); |
| 536 | let ref_off = (src_x as usize) + ((src_y + 1) as usize) * stride; |
| 537 | for i in 0..8 { |
| 538 | ydata[cur_off + i] = self.ref_frame.ydata[ref_off + i]; |
| 539 | udata[cur_off + i] = self.ref_frame.udata[ref_off + i]; |
| 540 | vdata[cur_off + i] = self.ref_frame.vdata[ref_off + i]; |
| 541 | } |
| 542 | ypred = ydata[cur_off + 7] - ydata[cur_off + 7 - stride]; |
| 543 | upred = udata[cur_off + 7] - udata[cur_off + 7 - stride]; |
| 544 | vpred = vdata[cur_off + 7] - vdata[cur_off + 7 - stride]; |
| 545 | }, |
| 546 | _ => unreachable!(), |
| 547 | } |
| 548 | } |
| 549 | } |
| 550 | } |
| 551 | pos += 8 * stride; |
| 552 | } |
| 553 | |
| 554 | Ok(()) |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | impl NADecoder for TM2XDecoder { |
| 559 | fn init(&mut self, info: NACodecInfoRef) -> DecoderResult<()> { |
| 560 | if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { |
| 561 | let fmt = NAPixelFormaton::new(ColorModel::YUV(YUVSubmodel::YUVJ), |
| 562 | Some(NAPixelChromaton::new(0, 0, false, 8, 0, 0, 1)), |
| 563 | Some(NAPixelChromaton::new(0, 0, false, 8, 0, 1, 1)), |
| 564 | Some(NAPixelChromaton::new(0, 0, false, 8, 0, 2, 1)), |
| 565 | None, None, 0, 3); |
| 566 | let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(vinfo.get_width(), vinfo.get_height(), false, fmt)); |
| 567 | self.width = vinfo.get_width(); |
| 568 | self.height = vinfo.get_height(); |
| 569 | self.cur_frame.resize(self.width, self.height); |
| 570 | self.ref_frame.resize(self.width, self.height); |
| 571 | self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref(); |
| 572 | Ok(()) |
| 573 | } else { |
| 574 | Err(DecoderError::InvalidData) |
| 575 | } |
| 576 | } |
| 577 | fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { |
| 578 | let src = pkt.get_buffer(); |
| 579 | validate!(src.len() > 8); |
| 580 | let mut mr = MemoryReader::new_read(&src); |
| 581 | let mut br = ByteReader::new(&mut mr); |
| 582 | let mut dec = Decryptor::default(); |
| 583 | |
| 584 | let mut initialised = false; |
| 585 | let mut got_key = false; |
| 586 | let mut data_size = 0; |
| 587 | self.cparams = [[CPARAM_MISSING; 8]; NUM_CPARAMS]; |
| 588 | self.is_intra = false; |
| 589 | while br.left() >= 8 { |
| 590 | let magic = br.read_u24be()?; |
| 591 | let ctype = br.read_byte()?; |
| 592 | let size = br.read_u32be()? as usize; |
| 593 | validate!(magic == 0xA00001 && br.left() >= (size as i64)); |
| 594 | if ctype == 0x06 { |
| 595 | validate!(size >= 4); |
| 596 | let key = br.read_u32be()?; |
| 597 | validate!((key as usize) == size - 4); |
| 598 | dec.set_state(key); |
| 599 | data_size = size - 4; |
| 600 | br.read_skip(size - 4)?; |
| 601 | got_key = true; |
| 602 | continue; |
| 603 | } |
| 604 | self.dec_buf.resize(size, 0); |
| 605 | br.read_buf(&mut self.dec_buf)?; |
| 606 | if ctype != 0x0A { |
| 607 | dec.decrypt(&mut self.dec_buf); |
| 608 | } |
| 609 | match ctype { |
| 610 | 0x08 | 0x0C | 0x10 | 0x11 | 0x15 | 0x16 => { |
| 611 | if ctype < 0x15 { // old versions are not encrypted, roll back and zero key |
| 612 | dec.decrypt(&mut self.dec_buf); |
| 613 | dec.set_state(0); |
| 614 | got_key = true; |
| 615 | } |
| 616 | validate!(got_key && !initialised); |
| 617 | match ctype { |
| 618 | 0x08 => self.parse_init(0)?, |
| 619 | 0x0C => self.parse_init(1)?, |
| 620 | 0x10 => self.parse_init(2)?, |
| 621 | 0x11 => self.parse_init(3)?, |
| 622 | 0x15 => self.parse_init(4)?, |
| 623 | 0x16 => self.parse_init(5)?, |
| 624 | _ => unreachable!(), |
| 625 | }; |
| 626 | initialised = true; |
| 627 | }, |
| 628 | 0x09 => { |
| 629 | validate!(initialised); |
| 630 | validate!(self.dec_buf.len() == 3); |
| 631 | validate!(self.dec_buf[0] == 8); |
| 632 | validate!(self.dec_buf[1] > 0); |
| 633 | validate!(self.dec_buf[2] == 1); |
| 634 | self.tile_size = self.dec_buf[1] as usize; |
| 635 | self.blk_info.resize(self.tile_size, BlkInfo::default()); |
| 636 | }, |
| 637 | 0x0B => { |
| 638 | validate!(initialised); |
| 639 | validate!(self.dec_buf.len() == 4); |
| 640 | let idx = self.dec_buf[3] as usize; |
| 641 | validate!(idx < NUM_CPARAMS); |
| 642 | validate!((self.dec_buf[0] as usize) < TM2X_CODING_PARAMS.len()); |
| 643 | if self.dec_buf[0] != 0 { |
| 644 | let tab = &TM2X_CODING_PARAMS[self.dec_buf[0] as usize]; |
| 645 | let m0 = tab[0] as usize; |
| 646 | let m1 = tab[1] as usize; |
| 647 | let m2 = tab[2] as usize; |
| 648 | let m3 = tab[3] as usize; |
| 649 | let full_mode = (m2 * 4 + m0) as u8; |
| 650 | let lores_mode = m0 as u8; |
| 651 | for i in 0..8 { |
| 652 | if (i % m1) == 0 && (i % m3) == 0 { |
| 653 | self.cparams[idx][i] = full_mode; |
| 654 | } else if (i % m1) == 0 { |
| 655 | self.cparams[idx][i] = lores_mode; |
| 656 | } else { |
| 657 | self.cparams[idx][i] = CPARAM_NONE; |
| 658 | } |
| 659 | } |
| 660 | } else { |
| 661 | for i in 0..8 { self.cparams[idx][i] = CPARAM_MV; } |
| 662 | } |
| 663 | }, |
| 664 | 0x02 => { |
| 665 | validate!(initialised); |
| 666 | self.parse_tabs()?; |
| 667 | }, |
| 668 | 0x0A => { |
| 669 | validate!(initialised); |
| 670 | self.parse_cb_desc(0xA)?; |
| 671 | }, |
| 672 | _ => { unimplemented!(); }, |
| 673 | }; |
| 674 | } |
| 675 | if !self.is_intra { |
| 676 | std::mem::swap(&mut self.cur_frame, &mut self.ref_frame); |
| 677 | } |
| 678 | self.decode_frame(&src[12..][..data_size])?; |
| 679 | |
| 680 | let myinfo = self.info.get_properties().get_video_info().unwrap(); |
| 681 | let bufret = alloc_video_buffer(myinfo, 2); |
| 682 | if let Err(_) = bufret { return Err(DecoderError::InvalidData); } |
| 683 | let bufinfo = bufret.unwrap(); |
| 684 | let mut buf = bufinfo.get_vbuf().unwrap(); |
| 685 | |
| 686 | self.output_frame(&mut buf); |
| 687 | |
| 688 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo); |
| 689 | frm.set_keyframe(self.is_intra); |
| 690 | frm.set_frame_type(if self.is_intra { FrameType::I } else { FrameType::P }); |
| 691 | Ok(Rc::new(RefCell::new(frm))) |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | pub fn get_decoder() -> Box<NADecoder> { |
| 696 | Box::new(TM2XDecoder::new()) |
| 697 | } |
| 698 | |
| 699 | #[cfg(test)] |
| 700 | mod test { |
| 701 | use nihav_core::codecs::RegisteredDecoders; |
| 702 | use nihav_core::demuxers::RegisteredDemuxers; |
| 703 | use nihav_core::test::dec_video::*; |
| 704 | use crate::codecs::duck_register_all_codecs; |
| 705 | use nihav_commonfmt::demuxers::generic_register_all_demuxers; |
| 706 | #[test] |
| 707 | fn test_tm2x() { |
| 708 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 709 | generic_register_all_demuxers(&mut dmx_reg); |
| 710 | let mut dec_reg = RegisteredDecoders::new(); |
| 711 | duck_register_all_codecs(&mut dec_reg); |
| 712 | |
| 713 | test_file_decoding("avi", "assets/Duck/TM2x.avi", Some(16), true, false, None/*Some("tm2x")*/, &dmx_reg, &dec_reg); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | const TM2X_CODING_PARAMS: [[u8; 4]; 25] = [ |
| 718 | [ 0, 0, 0, 0 ], [ 0, 1, 1, 1 ], [ 0, 1, 1, 2 ], [ 0, 1, 2, 4 ], [ 1, 1, 2, 4 ], |
| 719 | [ 0, 2, 2, 4 ], [ 1, 2, 2, 4 ], [ 2, 2, 2, 4 ], [ 1, 4, 2, 4 ], [ 2, 4, 2, 4 ], |
| 720 | [ 2, 8, 3, 8 ], [ 3, 4, 3, 8 ], [ 3, 8, 3, 8 ], [ 0, 1, 1, 4 ], [ 0, 1, 2, 2 ], |
| 721 | [ 0, 2, 1, 4 ], [ 1, 1, 2, 2 ], [ 1, 4, 2, 8 ], [ 2, 2, 3, 4 ], [ 2, 4, 3, 8 ], |
| 722 | [ 0, 1, 3, 8 ], [ 1, 2, 3, 8 ], [ 2, 4, 2, 4 ], [ 2, 4, 3, 8 ], [ 3, 8, 3, 8 ] |
| 723 | ]; |