| 1 | use nihav_core::codecs::*; |
| 2 | use nihav_core::io::byteio::*; |
| 3 | use nihav_core::io::bitreader::*; |
| 4 | use nihav_core::io::codebook::*; |
| 5 | use nihav_codec_support::codecs::IPShuffler; |
| 6 | |
| 7 | const COEFFS_PER_BLOCK: [usize; 4] = [0, 1, 4, 64]; |
| 8 | |
| 9 | struct BlockTypeReader<'a> { |
| 10 | src: &'a [u8], |
| 11 | pos: usize, |
| 12 | bpos: usize, |
| 13 | } |
| 14 | |
| 15 | impl<'a> BlockTypeReader<'a> { |
| 16 | fn read_block_type(&mut self) -> DecoderResult<usize> { |
| 17 | if self.pos >= self.src.len() { |
| 18 | return Err(DecoderError::ShortData); |
| 19 | } |
| 20 | let btype = (self.src[self.pos] >> self.bpos) & 3; |
| 21 | self.bpos += 2; |
| 22 | if self.bpos == 8 { |
| 23 | self.bpos = 0; |
| 24 | self.pos += 1; |
| 25 | } |
| 26 | Ok(btype as usize) |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | struct MaskReader<'a> { |
| 31 | src: &'a [u8], |
| 32 | pos: usize, |
| 33 | bpos: usize, |
| 34 | } |
| 35 | |
| 36 | impl<'a> MaskReader<'a> { |
| 37 | fn read_type(&mut self) -> DecoderResult<(bool, bool)> { |
| 38 | if self.pos >= self.src.len() { |
| 39 | return Err(DecoderError::ShortData); |
| 40 | } |
| 41 | let is_intra = ((self.src[self.pos] >> self.bpos) & 1) == 0; |
| 42 | let has_residue = ((self.src[self.pos] >> (self.bpos + 4)) & 1) == 0; |
| 43 | self.bpos += 1; |
| 44 | if self.bpos == 4 { |
| 45 | self.bpos = 0; |
| 46 | self.pos += 1; |
| 47 | } |
| 48 | Ok((is_intra, has_residue)) |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | struct Midivid3Decoder { |
| 53 | info: NACodecInfoRef, |
| 54 | shuf: IPShuffler, |
| 55 | cb: Codebook<u32>, |
| 56 | width: usize, |
| 57 | height: usize, |
| 58 | num_mbs: usize, |
| 59 | coeffs: [i16; 65536], |
| 60 | mvs: Vec<i16>, |
| 61 | qmat_y_intra: [i16; 64], |
| 62 | qmat_c_intra: [i16; 64], |
| 63 | qmat_y_inter: [i16; 64], |
| 64 | qmat_c_inter: [i16; 64], |
| 65 | } |
| 66 | |
| 67 | impl Midivid3Decoder { |
| 68 | fn new() -> Self { |
| 69 | let mut cr = ShortCodebookDescReader::new(vec![ |
| 70 | ShortCodebookDesc { code: 0b00, bits: 2 }, |
| 71 | ShortCodebookDesc { code: 0b01, bits: 2 }, |
| 72 | ShortCodebookDesc { code: 0b100, bits: 3 }, |
| 73 | ShortCodebookDesc { code: 0b101, bits: 3 }, |
| 74 | ShortCodebookDesc { code: 0b110, bits: 3 }, |
| 75 | ShortCodebookDesc { code: 0b1110, bits: 4 }, |
| 76 | ShortCodebookDesc { code: 0b11110, bits: 5 }, |
| 77 | ShortCodebookDesc { code: 0b111110, bits: 6 }, |
| 78 | ShortCodebookDesc { code: 0b1111110, bits: 7 }, |
| 79 | ShortCodebookDesc { code: 0b11111110, bits: 8 }, |
| 80 | ShortCodebookDesc { code: 0b111111110, bits: 9 }, |
| 81 | ShortCodebookDesc { code: 0b111111111, bits: 9 } |
| 82 | ]); |
| 83 | let cb = Codebook::new(&mut cr, CodebookMode::MSB).unwrap(); |
| 84 | Midivid3Decoder { |
| 85 | info: NACodecInfoRef::default(), |
| 86 | shuf: IPShuffler::default(), |
| 87 | cb, |
| 88 | width: 0, height: 0, num_mbs: 0, |
| 89 | coeffs: [0; 65536], |
| 90 | mvs: Vec::new(), |
| 91 | qmat_y_intra: [0; 64], |
| 92 | qmat_c_intra: [0; 64], |
| 93 | qmat_y_inter: [0; 64], |
| 94 | qmat_c_inter: [0; 64], |
| 95 | } |
| 96 | } |
| 97 | fn decode_intra(&mut self, frm: &mut NASimpleVideoFrame<u8>, bt_reader: &mut BlockTypeReader, br: &mut BitReader) -> DecoderResult<()> { |
| 98 | let mut ydst = frm.offset[0]; |
| 99 | let mut udst = frm.offset[1]; |
| 100 | let mut vdst = frm.offset[2]; |
| 101 | for _y in (0..self.height).step_by(16) { |
| 102 | let mut ydc = 0; |
| 103 | let mut udc = 0; |
| 104 | let mut vdc = 0; |
| 105 | let ncoeffs = br.read(16)? as usize; |
| 106 | decode_values(br, &mut self.coeffs[..ncoeffs], &self.cb)?; |
| 107 | let mut cpos = 0; |
| 108 | for x in (0..self.width).step_by(16) { |
| 109 | for blk in 0..4 { |
| 110 | let btype = bt_reader.read_block_type()?; |
| 111 | let nc = COEFFS_PER_BLOCK[btype]; |
| 112 | validate!(cpos + nc <= ncoeffs); |
| 113 | let cur_off = x + (blk & 1) * 8 + (blk & 2) * 4 * frm.stride[0]; |
| 114 | if btype != 0 { |
| 115 | self.coeffs[cpos] += ydc; |
| 116 | ydc = self.coeffs[cpos]; |
| 117 | } |
| 118 | decode_block_intra(&mut frm.data[ydst + cur_off..], frm.stride[0], btype, &self.coeffs[cpos..], &self.qmat_y_intra); |
| 119 | cpos += nc; |
| 120 | } |
| 121 | let btype = bt_reader.read_block_type()?; |
| 122 | let nc = COEFFS_PER_BLOCK[btype]; |
| 123 | validate!(cpos + nc <= ncoeffs); |
| 124 | if btype != 0 { |
| 125 | self.coeffs[cpos] += udc; |
| 126 | udc = self.coeffs[cpos]; |
| 127 | } |
| 128 | decode_block_intra(&mut frm.data[udst + x / 2..], frm.stride[1], btype, &self.coeffs[cpos..], &self.qmat_c_intra); |
| 129 | cpos += nc; |
| 130 | let btype = bt_reader.read_block_type()?; |
| 131 | let nc = COEFFS_PER_BLOCK[btype]; |
| 132 | validate!(cpos + nc <= ncoeffs); |
| 133 | if btype != 0 { |
| 134 | self.coeffs[cpos] += vdc; |
| 135 | vdc = self.coeffs[cpos]; |
| 136 | } |
| 137 | decode_block_intra(&mut frm.data[vdst + x / 2..], frm.stride[2], btype, &self.coeffs[cpos..], &self.qmat_c_intra); |
| 138 | cpos += nc; |
| 139 | } |
| 140 | ydst += frm.stride[0] * 16; |
| 141 | udst += frm.stride[1] * 8; |
| 142 | vdst += frm.stride[2] * 8; |
| 143 | } |
| 144 | Ok(()) |
| 145 | } |
| 146 | fn decode_inter(&mut self, frm: &mut NASimpleVideoFrame<u8>, mask_reader: &mut MaskReader, bt_reader: &mut BlockTypeReader, br: &mut BitReader, num_mvs: usize) -> DecoderResult<()> { |
| 147 | let ref_frm = self.shuf.get_ref(); |
| 148 | if ref_frm.is_none() { |
| 149 | return Err(DecoderError::MissingReference); |
| 150 | } |
| 151 | let ref_frm = ref_frm.unwrap(); |
| 152 | |
| 153 | decode_values(br, &mut self.mvs[..num_mvs * 2], &self.cb)?; |
| 154 | |
| 155 | let mut ydst = frm.offset[0]; |
| 156 | let mut udst = frm.offset[1]; |
| 157 | let mut vdst = frm.offset[2]; |
| 158 | let mut cur_mv = 0; |
| 159 | for y in (0..self.height).step_by(16) { |
| 160 | let mut ydc = 0; |
| 161 | let mut udc = 0; |
| 162 | let mut vdc = 0; |
| 163 | let ncoeffs = br.read(16)? as usize; |
| 164 | let pred_mbs = br.read(8)? as usize; |
| 165 | decode_values(br, &mut self.coeffs[..ncoeffs], &self.cb)?; |
| 166 | let mut cpos = 0; |
| 167 | let mut cur_mb = 0; |
| 168 | for x in (0..self.width).step_by(16) { |
| 169 | let (is_intra, has_residue) = mask_reader.read_type()?; |
| 170 | if is_intra { |
| 171 | for blk in 0..4 { |
| 172 | let btype = bt_reader.read_block_type()?; |
| 173 | let nc = COEFFS_PER_BLOCK[btype]; |
| 174 | validate!(cpos + nc <= ncoeffs); |
| 175 | if (btype != 0) && (cur_mb < pred_mbs) { |
| 176 | self.coeffs[cpos] += ydc; |
| 177 | ydc = self.coeffs[cpos]; |
| 178 | } |
| 179 | let cur_off = x + (blk & 1) * 8 + (blk & 2) * 4 * frm.stride[0]; |
| 180 | decode_block_intra(&mut frm.data[ydst + cur_off..], frm.stride[0], btype, &self.coeffs[cpos..], &self.qmat_y_intra); |
| 181 | cpos += nc; |
| 182 | } |
| 183 | let btype = bt_reader.read_block_type()?; |
| 184 | let nc = COEFFS_PER_BLOCK[btype]; |
| 185 | validate!(cpos + nc <= ncoeffs); |
| 186 | if (btype != 0) && (cur_mb < pred_mbs) { |
| 187 | self.coeffs[cpos] += udc; |
| 188 | udc = self.coeffs[cpos]; |
| 189 | } |
| 190 | decode_block_intra(&mut frm.data[udst + x / 2..], frm.stride[1], btype, &self.coeffs[cpos..], &self.qmat_c_intra); |
| 191 | cpos += nc; |
| 192 | let btype = bt_reader.read_block_type()?; |
| 193 | let nc = COEFFS_PER_BLOCK[btype]; |
| 194 | validate!(cpos + nc <= ncoeffs); |
| 195 | if (btype != 0) && (cur_mb < pred_mbs) { |
| 196 | self.coeffs[cpos] += vdc; |
| 197 | vdc = self.coeffs[cpos]; |
| 198 | } |
| 199 | decode_block_intra(&mut frm.data[vdst + x / 2..], frm.stride[2], btype, &self.coeffs[cpos..], &self.qmat_c_intra); |
| 200 | cpos += nc; |
| 201 | } else { |
| 202 | validate!(cur_mv < num_mvs); |
| 203 | let mv_x = self.mvs[cur_mv * 2]; |
| 204 | let mv_y = self.mvs[cur_mv * 2 + 1]; |
| 205 | cur_mv += 1; |
| 206 | let src_x = (x as isize) + (mv_x as isize); |
| 207 | let src_y = (y as isize) + (mv_y as isize); |
| 208 | validate!(src_x >= 0 && src_x + 16 <= self.width as isize); |
| 209 | validate!(src_y >= 0 && src_y + 16 <= self.height as isize); |
| 210 | let sstride = ref_frm.get_stride(0); |
| 211 | let src = &ref_frm.get_data()[ref_frm.get_offset(0) + (src_x as usize) + (src_y as usize) * sstride..]; |
| 212 | let dst = &mut frm.data[ydst + x..]; |
| 213 | for (dst, src) in dst.chunks_mut(frm.stride[0]).zip(src.chunks(sstride)).take(16) { |
| 214 | (&mut dst[..16]).copy_from_slice(&src[..16]); |
| 215 | } |
| 216 | let xoff = (src_x as usize) >> 1; |
| 217 | let yoff = (src_y as usize) >> 1; |
| 218 | for plane in 1..3 { |
| 219 | let sstride = ref_frm.get_stride(plane); |
| 220 | let src = &ref_frm.get_data()[ref_frm.get_offset(plane) + xoff + yoff * sstride..]; |
| 221 | let dst = &mut frm.data[if plane == 1 { udst } else { vdst } + x / 2..]; |
| 222 | for (dst, src) in dst.chunks_mut(frm.stride[plane]).zip(src.chunks(sstride)).take(8) { |
| 223 | (&mut dst[..8]).copy_from_slice(&src[..8]); |
| 224 | } |
| 225 | } |
| 226 | if has_residue { |
| 227 | for blk in 0..4 { |
| 228 | let btype = bt_reader.read_block_type()?; |
| 229 | let nc = COEFFS_PER_BLOCK[btype]; |
| 230 | validate!(cpos + nc <= ncoeffs); |
| 231 | if (btype != 0) && (cur_mb < pred_mbs) { |
| 232 | self.coeffs[cpos] += ydc; |
| 233 | ydc = self.coeffs[cpos]; |
| 234 | } |
| 235 | let cur_off = x + (blk & 1) * 8 + (blk & 2) * 4 * frm.stride[0]; |
| 236 | decode_block_inter(&mut frm.data[ydst + cur_off..], frm.stride[0], btype, &self.coeffs[cpos..], &self.qmat_y_inter); |
| 237 | cpos += nc; |
| 238 | } |
| 239 | let btype = bt_reader.read_block_type()?; |
| 240 | let nc = COEFFS_PER_BLOCK[btype]; |
| 241 | validate!(cpos + nc <= ncoeffs); |
| 242 | if (btype != 0) && (cur_mb < pred_mbs) { |
| 243 | self.coeffs[cpos] += udc; |
| 244 | udc = self.coeffs[cpos]; |
| 245 | } |
| 246 | decode_block_inter(&mut frm.data[udst + x / 2..], frm.stride[1], btype, &self.coeffs[cpos..], &self.qmat_c_inter); |
| 247 | cpos += nc; |
| 248 | let btype = bt_reader.read_block_type()?; |
| 249 | let nc = COEFFS_PER_BLOCK[btype]; |
| 250 | validate!(cpos + nc <= ncoeffs); |
| 251 | if (btype != 0) && (cur_mb < pred_mbs) { |
| 252 | self.coeffs[cpos] += vdc; |
| 253 | vdc = self.coeffs[cpos]; |
| 254 | } |
| 255 | decode_block_inter(&mut frm.data[vdst + x / 2..], frm.stride[2], btype, &self.coeffs[cpos..], &self.qmat_c_inter); |
| 256 | cpos += nc; |
| 257 | } |
| 258 | } |
| 259 | if is_intra || has_residue { |
| 260 | cur_mb += 1; |
| 261 | } |
| 262 | } |
| 263 | ydst += frm.stride[0] * 16; |
| 264 | udst += frm.stride[1] * 8; |
| 265 | vdst += frm.stride[2] * 8; |
| 266 | } |
| 267 | Ok(()) |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | fn decode_values(br: &mut BitReader, dst: &mut [i16], cb: &Codebook<u32>) -> DecoderResult<()> { |
| 272 | let mut zero_run = 0usize; |
| 273 | for el in dst.iter_mut() { |
| 274 | if zero_run > 0 { |
| 275 | *el = 0; |
| 276 | zero_run -= 1; |
| 277 | } else { |
| 278 | let val = br.read_cb(&cb)? as u8; |
| 279 | if val == 0 { |
| 280 | zero_run = if br.read_bool()? { |
| 281 | br.read(6)? as usize + 8 |
| 282 | } else { |
| 283 | br.read(3)? as usize |
| 284 | }; |
| 285 | *el = 0; |
| 286 | } else { |
| 287 | let sign = br.read_bool()?; |
| 288 | let abits = br.read(val - 1)? as i16; |
| 289 | *el = (1 << (val - 1)) + abits; |
| 290 | if sign { |
| 291 | *el = -*el; |
| 292 | } |
| 293 | } |
| 294 | } |
| 295 | } |
| 296 | Ok(()) |
| 297 | } |
| 298 | |
| 299 | fn dequant(val: i16, q: i16) -> i32 { |
| 300 | i32::from(val) * i32::from(q) |
| 301 | } |
| 302 | |
| 303 | fn scale_coef(val: i32, scale: i16) -> i32 { |
| 304 | (val * i32::from(scale)) >> 8 |
| 305 | } |
| 306 | |
| 307 | macro_rules! idct_1d { |
| 308 | ($c0: expr, $c1: expr, $c2: expr, $c3: expr, $c4: expr, $c5: expr, $c6: expr, $c7: expr) => { |
| 309 | let t0 = $c0 + $c4; |
| 310 | let t1 = $c0 - $c4; |
| 311 | let t2 = $c2 + $c6; |
| 312 | let t3 = scale_coef($c2 - $c6, 362) - t2; |
| 313 | let t4 = t0 + t2; |
| 314 | let t5 = t0 - t2; |
| 315 | let t6 = t1 + t3; |
| 316 | let t7 = t1 - t3; |
| 317 | let t8 = $c5 + $c3; |
| 318 | let t9 = $c5 - $c3; |
| 319 | let ta = $c1 + $c7; |
| 320 | let tb = $c1 - $c7; |
| 321 | let tc = t8 + ta; |
| 322 | let td = scale_coef(tb + t9, 473); |
| 323 | let te = scale_coef(t9, -669) - tc + td; |
| 324 | let tf = scale_coef(ta - t8, 362) - te; |
| 325 | let t10 = scale_coef(tb, 277) - td + tf; |
| 326 | $c0 = t4 + tc; |
| 327 | $c1 = t6 + te; |
| 328 | $c2 = t7 + tf; |
| 329 | $c3 = t5 - t10; |
| 330 | $c4 = t5 + t10; |
| 331 | $c5 = t7 - tf; |
| 332 | $c6 = t6 - te; |
| 333 | $c7 = t4 - tc; |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | #[allow(clippy::erasing_op)] |
| 338 | #[allow(clippy::identity_op)] |
| 339 | fn idct(blk: &mut [i32; 64]) { |
| 340 | for i in 0..8 { |
| 341 | idct_1d!(blk[i + 0 * 8], blk[i + 1 * 8], blk[i + 2 * 8], blk[i + 3 * 8], |
| 342 | blk[i + 4 * 8], blk[i + 5 * 8], blk[i + 6 * 8], blk[i + 7 * 8]); |
| 343 | } |
| 344 | for row in blk.chunks_mut(8) { |
| 345 | idct_1d!(row[0], row[1], row[2], row[3], row[4], row[5], row[6], row[7]); |
| 346 | } |
| 347 | for el in blk.iter_mut() { |
| 348 | *el >>= 5; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | fn decode_block_intra(dst: &mut [u8], stride: usize, btype: usize, coeffs: &[i16], qmat: &[i16; 64]) { |
| 353 | match btype { |
| 354 | 0 | 1 => { |
| 355 | let fill_val = if btype == 0 { 0x80 } else { |
| 356 | ((dequant(coeffs[0], qmat[0]) >> 5) + 128).max(0).min(255) as u8 |
| 357 | }; |
| 358 | for line in dst.chunks_mut(stride).take(8) { |
| 359 | for el in line.iter_mut().take(8) { |
| 360 | *el = fill_val; |
| 361 | } |
| 362 | } |
| 363 | }, |
| 364 | 2 => { |
| 365 | let mut blk = [0i32; 64]; |
| 366 | blk[0] = dequant(coeffs[0], qmat[0]); |
| 367 | blk[1] = dequant(coeffs[1], qmat[1]); |
| 368 | blk[8] = dequant(coeffs[2], qmat[8]); |
| 369 | blk[9] = dequant(coeffs[3], qmat[9]); |
| 370 | idct(&mut blk); |
| 371 | for (line, row) in dst.chunks_mut(stride).zip(blk.chunks(8)).take(8) { |
| 372 | for (dst, coef) in line.iter_mut().zip(row.iter()).take(8) { |
| 373 | *dst = (*coef + 128).max(0).min(255) as u8; |
| 374 | } |
| 375 | } |
| 376 | }, |
| 377 | _ => { |
| 378 | let mut blk = [0i32; 64]; |
| 379 | for i in 0..64 { |
| 380 | blk[SCAN[i]] = dequant(coeffs[i], qmat[SCAN[i]]); |
| 381 | } |
| 382 | idct(&mut blk); |
| 383 | for (line, row) in dst.chunks_mut(stride).zip(blk.chunks(8)).take(8) { |
| 384 | for (dst, coef) in line.iter_mut().zip(row.iter()).take(8) { |
| 385 | *dst = (*coef + 128).max(0).min(255) as u8; |
| 386 | } |
| 387 | } |
| 388 | }, |
| 389 | }; |
| 390 | } |
| 391 | |
| 392 | fn decode_block_inter(dst: &mut [u8], stride: usize, btype: usize, coeffs: &[i16], qmat: &[i16; 64]) { |
| 393 | match btype { |
| 394 | 0 => {} |
| 395 | 1 => { |
| 396 | let dc = dequant(coeffs[0], qmat[0]) >> 5; |
| 397 | for line in dst.chunks_mut(stride).take(8) { |
| 398 | for el in line.iter_mut().take(8) { |
| 399 | *el = (i32::from(*el) + dc).max(0).min(255) as u8; |
| 400 | } |
| 401 | } |
| 402 | }, |
| 403 | 2 => { |
| 404 | let mut blk = [0i32; 64]; |
| 405 | blk[0] = dequant(coeffs[0], qmat[0]); |
| 406 | blk[1] = dequant(coeffs[1], qmat[1]); |
| 407 | blk[8] = dequant(coeffs[2], qmat[8]); |
| 408 | blk[9] = dequant(coeffs[3], qmat[9]); |
| 409 | idct(&mut blk); |
| 410 | for (line, row) in dst.chunks_mut(stride).zip(blk.chunks(8)).take(8) { |
| 411 | for (dst, coef) in line.iter_mut().zip(row.iter()).take(8) { |
| 412 | *dst = (i32::from(*dst) + *coef).max(0).min(255) as u8; |
| 413 | } |
| 414 | } |
| 415 | }, |
| 416 | _ => { |
| 417 | let mut blk = [0i32; 64]; |
| 418 | for i in 0..64 { |
| 419 | blk[SCAN[i]] = dequant(coeffs[i], qmat[SCAN[i]]); |
| 420 | } |
| 421 | idct(&mut blk); |
| 422 | for (line, row) in dst.chunks_mut(stride).zip(blk.chunks(8)).take(8) { |
| 423 | for (dst, coef) in line.iter_mut().zip(row.iter()).take(8) { |
| 424 | *dst = (i32::from(*dst) + *coef).max(0).min(255) as u8; |
| 425 | } |
| 426 | } |
| 427 | }, |
| 428 | }; |
| 429 | } |
| 430 | |
| 431 | fn init_quant(qmat: &mut [i16; 64], base_qmat: &[u8; 64], quant: u8) { |
| 432 | let q = if quant < 50 { |
| 433 | 5000 / i32::from(quant.max(1)) |
| 434 | } else { |
| 435 | i32::from((100 - quant.min(100)) * 2) |
| 436 | }; |
| 437 | for (inq, (outq, scale)) in base_qmat.iter().zip(qmat.iter_mut().zip(QUANT_MATRIX.iter())) { |
| 438 | let val = ((i32::from(*inq) * q + 50) / 100).max(1).min(0x7FFF); |
| 439 | *outq = ((val * i32::from(*scale) + 0x800) >> 12) as i16; |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | impl NADecoder for Midivid3Decoder { |
| 444 | fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { |
| 445 | if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { |
| 446 | self.width = vinfo.get_width(); |
| 447 | self.height = vinfo.get_height(); |
| 448 | let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(self.width, self.height, true, YUV420_FORMAT)); |
| 449 | self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref(); |
| 450 | self.num_mbs = ((self.width + 15) >> 4) * ((self.height + 15) >> 4); |
| 451 | self.mvs.resize(self.num_mbs * 2, 0); |
| 452 | |
| 453 | Ok(()) |
| 454 | } else { |
| 455 | Err(DecoderError::InvalidData) |
| 456 | } |
| 457 | } |
| 458 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { |
| 459 | let src = pkt.get_buffer(); |
| 460 | validate!(src.len() > 8); |
| 461 | |
| 462 | let i_quant = src[0]; |
| 463 | let p_quant = i_quant.wrapping_add(src[1]); |
| 464 | let inter_flag = read_u16le(&src[2..])?; |
| 465 | validate!(inter_flag < 2); |
| 466 | let is_intra = inter_flag == 0; |
| 467 | |
| 468 | init_quant(&mut self.qmat_y_intra, &QUANT_MAT_LUMA, i_quant); |
| 469 | init_quant(&mut self.qmat_c_intra, &QUANT_MAT_CHROMA, i_quant); |
| 470 | init_quant(&mut self.qmat_y_inter, &QUANT_MAT_LUMA, p_quant); |
| 471 | init_quant(&mut self.qmat_c_inter, &QUANT_MAT_CHROMA, p_quant); |
| 472 | |
| 473 | let bufinfo = alloc_video_buffer(self.info.get_properties().get_video_info().unwrap(), 4)?; |
| 474 | let mut buf = bufinfo.get_vbuf().unwrap(); |
| 475 | |
| 476 | let mut frm = NASimpleVideoFrame::from_video_buf(&mut buf).unwrap(); |
| 477 | let bt_size = read_u16le(&src[4..])? as usize; |
| 478 | if is_intra { |
| 479 | validate!(bt_size + 6 <= src.len()); |
| 480 | |
| 481 | let bt_buf = if is_intra { &src[6..][..bt_size] } else { &src[8..][..bt_size] }; |
| 482 | let mut bt_reader = BlockTypeReader { src: bt_buf, pos: 0, bpos: 0 }; |
| 483 | let mut br = BitReader::new(&src[6 + bt_size..], BitReaderMode::BE); |
| 484 | |
| 485 | self.decode_intra(&mut frm, &mut bt_reader, &mut br)?; |
| 486 | } else { |
| 487 | let num_mvs = read_u16le(&src[6..])? as usize; |
| 488 | let mask_len = (self.num_mbs + 3) >> 2; |
| 489 | let data_start = 8 + bt_size + mask_len; |
| 490 | validate!(data_start <= src.len()); |
| 491 | validate!(num_mvs <= self.num_mbs); |
| 492 | |
| 493 | let bt_buf = &src[8 + mask_len..][..bt_size]; |
| 494 | let mask = &src[8..][..mask_len]; |
| 495 | let mut mask_reader = MaskReader { src: mask, pos: 0, bpos: 0 }; |
| 496 | let mut bt_reader = BlockTypeReader { src: bt_buf, pos: 0, bpos: 0 }; |
| 497 | let mut br = BitReader::new(&src[data_start..], BitReaderMode::BE); |
| 498 | |
| 499 | self.decode_inter(&mut frm, &mut mask_reader, &mut bt_reader, &mut br, num_mvs)?; |
| 500 | } |
| 501 | |
| 502 | self.shuf.add_frame(buf.clone()); |
| 503 | |
| 504 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), NABufferType::Video(buf)); |
| 505 | frm.set_keyframe(is_intra); |
| 506 | frm.set_frame_type(if is_intra { FrameType::I } else { FrameType::P }); |
| 507 | Ok(frm.into_ref()) |
| 508 | } |
| 509 | fn flush(&mut self) { |
| 510 | self.shuf.clear(); |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | impl NAOptionHandler for Midivid3Decoder { |
| 515 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 516 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 517 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 518 | } |
| 519 | |
| 520 | |
| 521 | pub fn get_decoder_video() -> Box<dyn NADecoder + Send> { |
| 522 | Box::new(Midivid3Decoder::new()) |
| 523 | } |
| 524 | |
| 525 | #[cfg(test)] |
| 526 | mod test { |
| 527 | use nihav_core::codecs::RegisteredDecoders; |
| 528 | use nihav_core::demuxers::RegisteredDemuxers; |
| 529 | use nihav_codec_support::test::dec_video::*; |
| 530 | use crate::game_register_all_decoders; |
| 531 | use nihav_commonfmt::generic_register_all_demuxers; |
| 532 | #[test] |
| 533 | fn test_midivid3_video() { |
| 534 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 535 | generic_register_all_demuxers(&mut dmx_reg); |
| 536 | let mut dec_reg = RegisteredDecoders::new(); |
| 537 | game_register_all_decoders(&mut dec_reg); |
| 538 | |
| 539 | test_decoding("avi", "midivid3", "assets/Game/mv30.avi", Some(16), &dmx_reg, &dec_reg, |
| 540 | ExpectedTestResult::MD5Frames(vec![ |
| 541 | [0x0f4f2377, 0xe017458f, 0xebf6d59d, 0x238a3e64], |
| 542 | [0xdca83224, 0xbd2fd721, 0x954804c6, 0xaa38b1f3], |
| 543 | [0x35104196, 0xf96eacb5, 0x5d34910a, 0xb6dfde27], |
| 544 | [0x6106ddf6, 0xda75f5bf, 0x1eaeef52, 0xffbfbdb8], |
| 545 | [0xdd429c46, 0x4bc67009, 0xdc14d6e2, 0x816f7e4a], |
| 546 | [0xa58a19fa, 0x663edfc1, 0x12a89fe7, 0x7ffd8484], |
| 547 | [0xf4f2f0c5, 0x5479661c, 0x22839c5f, 0x8ff45232], |
| 548 | [0xb70cb7d9, 0x9c514449, 0xabb85bb4, 0x5b20d9d7], |
| 549 | [0xd65c33cc, 0xba03ff85, 0x615b3171, 0xfd16334f], |
| 550 | [0x13c5ffc3, 0x1e279df1, 0x48393c15, 0x394bfabe], |
| 551 | [0x169cb91a, 0x2a8f8a63, 0x995d53c2, 0x1123d5e9], |
| 552 | [0x26a8bc57, 0x3b8ba658, 0xb960ef85, 0xf4dbd720], |
| 553 | [0x13a405e9, 0x3fae3101, 0xee1c29f4, 0x3bf69d94], |
| 554 | [0x3d7b1b6b, 0x9026d717, 0x97e1c6c1, 0x4c6877a7], |
| 555 | [0x8f2f4b9a, 0x6afa65f3, 0x9b0e0173, 0x56725a4a], |
| 556 | [0x4b140176, 0x10ee87d5, 0x899e86fe, 0xb30fc404], |
| 557 | [0xb82892a1, 0x2eda670c, 0x7a130bb4, 0x810fc089]])); |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | const QUANT_MAT_LUMA: [u8; 64] = [ |
| 562 | 12, 12, 15, 19, 25, 34, 40, 48, |
| 563 | 12, 12, 18, 22, 27, 44, 47, 46, |
| 564 | 17, 18, 21, 26, 35, 46, 52, 47, |
| 565 | 18, 20, 24, 28, 40, 61, 59, 51, |
| 566 | 20, 24, 32, 43, 50, 72, 72, 63, |
| 567 | 25, 31, 42, 48, 58, 72, 81, 75, |
| 568 | 38, 46, 54, 61, 71, 84, 88, 85, |
| 569 | 50, 61, 65, 68, 79, 78, 86, 91 |
| 570 | ]; |
| 571 | |
| 572 | const QUANT_MAT_CHROMA: [u8; 64] = [ |
| 573 | 12, 16, 24, 47, 99, 99, 99, 99, |
| 574 | 16, 21, 26, 66, 99, 99, 99, 99, |
| 575 | 24, 26, 56, 99, 99, 99, 99, 99, |
| 576 | 47, 66, 99, 99, 99, 99, 99, 99, |
| 577 | 99, 99, 99, 99, 99, 99, 99, 99, |
| 578 | 99, 99, 99, 99, 99, 99, 99, 99, |
| 579 | 99, 99, 99, 99, 99, 99, 99, 99, |
| 580 | 99, 99, 99, 99, 99, 99, 99, 99 |
| 581 | ]; |
| 582 | |
| 583 | const QUANT_MATRIX: [i16; 64] = [ |
| 584 | 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, |
| 585 | 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270, |
| 586 | 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906, |
| 587 | 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315, |
| 588 | 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, |
| 589 | 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552, |
| 590 | 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446, |
| 591 | 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247 |
| 592 | ]; |
| 593 | |
| 594 | const SCAN: [usize; 64] = [ |
| 595 | 0, 1, 8, 9, 16, 2, 3, 10, |
| 596 | 17, 24, 32, 25, 18, 11, 4, 5, |
| 597 | 12, 19, 26, 33, 40, 48, 41, 34, |
| 598 | 27, 20, 13, 6, 7, 14, 21, 28, |
| 599 | 35, 42, 49, 56, 57, 50, 43, 36, |
| 600 | 29, 22, 15, 23, 30, 37, 44, 51, |
| 601 | 58, 59, 52, 45, 38, 31, 39, 46, |
| 602 | 53, 60, 61, 54, 47, 55, 62, 63 |
| 603 | ]; |