| 1 | use nihav_core::io::bitreader::*; |
| 2 | use nihav_core::io::codebook::*; |
| 3 | use nihav_core::formats; |
| 4 | use nihav_core::frame::*; |
| 5 | use nihav_core::codecs::*; |
| 6 | use nihav_codec_support::codecs::{MV, ZIGZAG}; |
| 7 | use nihav_codec_support::codecs::blockdsp; |
| 8 | use nihav_codec_support::codecs::h263::*; |
| 9 | use nihav_codec_support::codecs::h263::code::{H263_INTERP_FUNCS, H263_INTERP_AVG_FUNCS, h263_filter_row}; |
| 10 | use nihav_codec_support::codecs::h263::decoder::*; |
| 11 | use nihav_codec_support::codecs::h263::data::*; |
| 12 | |
| 13 | |
| 14 | #[allow(dead_code)] |
| 15 | struct Tables { |
| 16 | intra_mcbpc_cb: Codebook<u8>, |
| 17 | inter_mcbpc_cb: Codebook<u8>, |
| 18 | mbtype_b_cb: Codebook<u8>, |
| 19 | cbpy_cb: Codebook<u8>, |
| 20 | cbpc_b_cb: Codebook<u8>, |
| 21 | rl_cb: Codebook<H263RLSym>, |
| 22 | aic_rl_cb: Codebook<H263RLSym>, |
| 23 | mv_cb: Codebook<u8>, |
| 24 | } |
| 25 | |
| 26 | #[derive(Clone,Copy)] |
| 27 | struct RPRInfo { |
| 28 | present: bool, |
| 29 | bits: u8, |
| 30 | widths: [usize; 8], |
| 31 | heights: [usize; 8], |
| 32 | } |
| 33 | |
| 34 | struct RealVideo20Decoder { |
| 35 | info: NACodecInfoRef, |
| 36 | dec: H263BaseDecoder, |
| 37 | tables: Tables, |
| 38 | w: usize, |
| 39 | h: usize, |
| 40 | minor_ver: u8, |
| 41 | rpr: RPRInfo, |
| 42 | bdsp: Box<dyn BlockDSP + Send>, |
| 43 | base_ts: u64, |
| 44 | last_ts: u16, |
| 45 | next_ts: u16, |
| 46 | } |
| 47 | |
| 48 | struct RealVideo20BR<'a> { |
| 49 | br: BitReader<'a>, |
| 50 | tables: &'a Tables, |
| 51 | num_slices: usize, |
| 52 | slice_no: usize, |
| 53 | slice_off: Vec<u32>, |
| 54 | w: usize, |
| 55 | h: usize, |
| 56 | mb_w: usize, |
| 57 | mb_h: usize, |
| 58 | mb_pos_bits: u8, |
| 59 | minor_ver: u8, |
| 60 | rpr: RPRInfo, |
| 61 | pts: u16, |
| 62 | } |
| 63 | |
| 64 | struct RV20SliceInfo { |
| 65 | ftype: Type, |
| 66 | seq: u32, |
| 67 | qscale: u8, |
| 68 | mb_x: usize, |
| 69 | mb_y: usize, |
| 70 | mb_pos: usize, |
| 71 | w: usize, |
| 72 | h: usize, |
| 73 | } |
| 74 | |
| 75 | #[derive(Default)] |
| 76 | struct RV20BlockDSP {} |
| 77 | |
| 78 | impl RV20SliceInfo { |
| 79 | fn new(ftype: Type, seq: u32, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self { |
| 80 | RV20SliceInfo { ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h } |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | macro_rules! idct { |
| 85 | ($src: expr, $sstep: expr, $dst: expr, $dstep: expr, $bias: expr, $shift: expr, $dtype: tt) => { |
| 86 | let s0 = $src[0] as i32; |
| 87 | let s1 = $src[$sstep] as i32; |
| 88 | let s2 = $src[$sstep * 2] as i32; |
| 89 | let s3 = $src[$sstep * 3] as i32; |
| 90 | let s4 = $src[$sstep * 4] as i32; |
| 91 | let s5 = $src[$sstep * 5] as i32; |
| 92 | let s6 = $src[$sstep * 6] as i32; |
| 93 | let s7 = $src[$sstep * 7] as i32; |
| 94 | |
| 95 | let t0 = (s0 + s4).wrapping_mul(1448); |
| 96 | let t1 = (s0 - s4).wrapping_mul(1448); |
| 97 | let t2 = s2.wrapping_mul(1892) + s6.wrapping_mul(784); |
| 98 | let t3 = s2.wrapping_mul(784) - s6.wrapping_mul(1892); |
| 99 | let t4 = s1.wrapping_mul(2009) + s3.wrapping_mul(1703) |
| 100 | + s5.wrapping_mul(1138) + s7.wrapping_mul(400); |
| 101 | let t5 = s1.wrapping_mul(1703) - s3.wrapping_mul(400) |
| 102 | - s5.wrapping_mul(2009) - s7.wrapping_mul(1138); |
| 103 | let t6 = s1.wrapping_mul(1138) - s3.wrapping_mul(2009) |
| 104 | + s5.wrapping_mul(400) + s7.wrapping_mul(1703); |
| 105 | let t7 = s1.wrapping_mul(400) - s3.wrapping_mul(1138) |
| 106 | + s5.wrapping_mul(1703) - s7.wrapping_mul(2009); |
| 107 | |
| 108 | let t8 = t0 + t2; |
| 109 | let t9 = t0 - t2; |
| 110 | let ta = t1 + t3; |
| 111 | let tb = t1 - t3; |
| 112 | |
| 113 | $dst[0] = ((t8 + t4 + $bias) >> $shift) as $dtype; |
| 114 | $dst[$dstep] = ((ta + t5 + $bias) >> $shift) as $dtype; |
| 115 | $dst[$dstep * 2] = ((tb + t6 + $bias) >> $shift) as $dtype; |
| 116 | $dst[$dstep * 3] = ((t9 + t7 + $bias) >> $shift) as $dtype; |
| 117 | $dst[$dstep * 4] = ((t9 - t7 + $bias) >> $shift) as $dtype; |
| 118 | $dst[$dstep * 5] = ((tb - t6 + $bias) >> $shift) as $dtype; |
| 119 | $dst[$dstep * 6] = ((ta - t5 + $bias) >> $shift) as $dtype; |
| 120 | $dst[$dstep * 7] = ((t8 - t4 + $bias) >> $shift) as $dtype; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | impl BlockDSP for RV20BlockDSP { |
| 125 | fn idct(&self, blk: &mut [i16; 64]) { |
| 126 | let mut tmp = [0i32; 64]; |
| 127 | for (dst, src) in tmp.chunks_mut(8).zip(blk.chunks(8)) { |
| 128 | idct!(src, 1, dst, 1, 0, 4, i32); |
| 129 | } |
| 130 | for i in 0..8 { |
| 131 | idct!(&tmp[i..], 8, &mut blk[i..], 8, 1 << 19, 20, i16); |
| 132 | } |
| 133 | } |
| 134 | fn copy_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV) { |
| 135 | let srcx = ((mv.x >> 1) as isize) + (xpos as isize); |
| 136 | let srcy = ((mv.y >> 1) as isize) + (ypos as isize); |
| 137 | let mode = ((mv.x & 1) + (mv.y & 1) * 2) as usize; |
| 138 | |
| 139 | blockdsp::copy_blocks(dst, src, xpos, ypos, srcx, srcy, w, h, 0, 1, mode, H263_INTERP_FUNCS); |
| 140 | } |
| 141 | fn avg_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV) { |
| 142 | let srcx = ((mv.x >> 1) as isize) + (xpos as isize); |
| 143 | let srcy = ((mv.y >> 1) as isize) + (ypos as isize); |
| 144 | let mode = ((mv.x & 1) + (mv.y & 1) * 2) as usize; |
| 145 | |
| 146 | blockdsp::copy_blocks(dst, src, xpos, ypos, srcx, srcy, w, h, 0, 1, mode, H263_INTERP_AVG_FUNCS); |
| 147 | } |
| 148 | fn filter_row(&self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo) { |
| 149 | h263_filter_row(buf, mb_y, mb_w, cbpi) |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | impl<'a> RealVideo20BR<'a> { |
| 154 | fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self { |
| 155 | let nslices = (src[0] as usize) + 1; |
| 156 | let mut slice_offs = Vec::with_capacity(nslices); |
| 157 | { |
| 158 | let offs = &src[1..][..nslices * 8]; |
| 159 | let mut br = BitReader::new(offs, BitReaderMode::BE); |
| 160 | for _ in 0..nslices { |
| 161 | br.skip(32).unwrap(); |
| 162 | let off = br.read(32).unwrap(); |
| 163 | slice_offs.push(off); |
| 164 | } |
| 165 | } |
| 166 | let soff = nslices * 8 + 1; |
| 167 | let mb_w = (width + 15) >> 4; |
| 168 | let mb_h = (height + 15) >> 4; |
| 169 | let max_pos = mb_w * mb_h - 1; |
| 170 | let mut mbpb = 0; |
| 171 | for i in 0..H263_MBB.len() { |
| 172 | if max_pos <= H263_MBB[i].blocks { |
| 173 | mbpb = H263_MBB[i].bits; |
| 174 | break; |
| 175 | } |
| 176 | } |
| 177 | RealVideo20BR { |
| 178 | br: BitReader::new(&src[soff..], BitReaderMode::BE), |
| 179 | tables, |
| 180 | num_slices: nslices, |
| 181 | slice_no: 0, |
| 182 | slice_off: slice_offs, |
| 183 | w: width, |
| 184 | h: height, |
| 185 | mb_w, |
| 186 | mb_h, |
| 187 | mb_pos_bits: mbpb, |
| 188 | minor_ver, |
| 189 | rpr, |
| 190 | pts: 0, |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | #[allow(unused_variables)] |
| 195 | fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize, acpred: ACPredMode) -> DecoderResult<()> { |
| 196 | let br = &mut self.br; |
| 197 | let mut idx = 0; |
| 198 | if !sstate.is_iframe && intra { |
| 199 | let mut dc = br.read(8)? as i16; |
| 200 | if dc == 255 { dc = 128; } |
| 201 | blk[0] = dc << 3; |
| 202 | idx = 1; |
| 203 | } |
| 204 | if !coded { return Ok(()); } |
| 205 | let scan = match acpred { |
| 206 | ACPredMode::Hor => H263_SCAN_V, |
| 207 | ACPredMode::Ver => H263_SCAN_H, |
| 208 | _ => &ZIGZAG, |
| 209 | }; |
| 210 | |
| 211 | let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb }; |
| 212 | let q = if plane_no == 0 { (quant * 2) as i16 } else { (H263_CHROMA_QUANT[quant as usize] * 2) as i16 }; |
| 213 | let q_add = if q == 0 || sstate.is_iframe { 0i16 } else { (((q >> 1) - 1) | 1) as i16 }; |
| 214 | while idx < 64 { |
| 215 | let code = br.read_cb(rl_cb)?; |
| 216 | let run; |
| 217 | let mut level; |
| 218 | let last; |
| 219 | if !code.is_escape() { |
| 220 | run = code.get_run(); |
| 221 | level = code.get_level(); |
| 222 | last = code.is_last(); |
| 223 | if br.read_bool()? { level = -level; } |
| 224 | if level >= 0 { |
| 225 | level = (level * q) + q_add; |
| 226 | } else { |
| 227 | level = (level * q) - q_add; |
| 228 | } |
| 229 | } else { |
| 230 | last = br.read_bool()?; |
| 231 | run = br.read(6)? as u8; |
| 232 | level = br.read_s(8)? as i16; |
| 233 | if level == -128 { |
| 234 | let low = br.read(5)? as i16; |
| 235 | let top = br.read_s(6)? as i16; |
| 236 | level = (top << 5) | low; |
| 237 | } |
| 238 | if level >= 0 { |
| 239 | level = (level * q) + q_add; |
| 240 | } else { |
| 241 | level = (level * q) - q_add; |
| 242 | } |
| 243 | if level < -2048 { level = -2048; } |
| 244 | if level > 2047 { level = 2047; } |
| 245 | } |
| 246 | idx += run; |
| 247 | validate!(idx < 64); |
| 248 | let oidx = scan[idx as usize]; |
| 249 | blk[oidx] = level; |
| 250 | idx += 1; |
| 251 | if last { break; } |
| 252 | } |
| 253 | Ok(()) |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> { |
| 258 | let code = br.read_cb(mv_cb)? as i16; |
| 259 | if code == 0 { return Ok(0) } |
| 260 | if !br.read_bool()? { |
| 261 | Ok(code) |
| 262 | } else { |
| 263 | Ok(-code) |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> { |
| 268 | let xval = decode_mv_component(br, mv_cb)?; |
| 269 | let yval = decode_mv_component(br, mv_cb)?; |
| 270 | Ok(MV::new(xval, yval)) |
| 271 | } |
| 272 | |
| 273 | fn read_dquant(br: &mut BitReader, q: u8) -> DecoderResult<u8> { |
| 274 | if br.read_bool()? { |
| 275 | Ok(H263_MODIFIED_QUANT[br.read(1)? as usize][q as usize]) |
| 276 | } else { |
| 277 | Ok(br.read(5)? as u8) |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | impl<'a> BlockDecoder for RealVideo20BR<'a> { |
| 282 | |
| 283 | #[allow(unused_variables)] |
| 284 | fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> { |
| 285 | self.slice_no = 0; |
| 286 | let shdr = self.read_slice_header()?; |
| 287 | // self.slice_no += 1; |
| 288 | validate!((shdr.mb_x == 0) && (shdr.mb_y == 0)); |
| 289 | /* let mb_count; |
| 290 | if self.slice_no < self.num_slices { |
| 291 | let pos = self.br.tell(); |
| 292 | let shdr2 = self.read_slice_header()?; |
| 293 | self.br.seek(pos as u32)?; |
| 294 | mb_count = shdr2.mb_pos - shdr.mb_pos; |
| 295 | } else { |
| 296 | mb_count = self.mb_w * self.mb_h; |
| 297 | }*/ |
| 298 | |
| 299 | let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false)); |
| 300 | let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, MVMode::Long, false, false, shdr.qscale, shdr.seq as u16, None, plusinfo); |
| 301 | Ok(picinfo) |
| 302 | } |
| 303 | |
| 304 | #[allow(unused_variables)] |
| 305 | fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> { |
| 306 | let shdr = self.read_slice_header()?; |
| 307 | self.slice_no += 1; |
| 308 | let mb_count; |
| 309 | if self.slice_no < self.num_slices { |
| 310 | let pos = self.br.tell(); |
| 311 | let shdr2 = self.read_slice_header()?; |
| 312 | mb_count = shdr2.mb_pos - shdr.mb_pos; |
| 313 | self.br.seek(pos as u32)?; |
| 314 | } else { |
| 315 | mb_count = self.mb_w * self.mb_h - shdr.mb_pos; |
| 316 | } |
| 317 | let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale); |
| 318 | |
| 319 | Ok(ret) |
| 320 | } |
| 321 | |
| 322 | fn decode_block_header(&mut self, info: &PicInfo, _slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> { |
| 323 | let br = &mut self.br; |
| 324 | let mut q = sstate.quant; |
| 325 | match info.get_mode() { |
| 326 | Type::I => { |
| 327 | let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; |
| 328 | while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; } |
| 329 | let mut acpred = ACPredMode::None; |
| 330 | if let Some(ref pi) = info.plusinfo { |
| 331 | if pi.aic { |
| 332 | let acpp = br.read_bool()?; |
| 333 | acpred = ACPredMode::DC; |
| 334 | if acpp { |
| 335 | acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver }; |
| 336 | } |
| 337 | } |
| 338 | } |
| 339 | let cbpy = br.read_cb(&self.tables.cbpy_cb)?; |
| 340 | let cbp = (cbpy << 2) | (cbpc & 3); |
| 341 | let dquant = (cbpc & 4) != 0; |
| 342 | if dquant { |
| 343 | q = read_dquant(br, q)?; |
| 344 | } |
| 345 | let mut binfo = BlockInfo::new(Type::I, cbp, q); |
| 346 | binfo.set_acpred(acpred); |
| 347 | Ok(binfo) |
| 348 | }, |
| 349 | Type::P => { |
| 350 | if br.read_bool()? { |
| 351 | return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); |
| 352 | } |
| 353 | let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; |
| 354 | while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; } |
| 355 | let is_intra = (cbpc & 0x04) != 0; |
| 356 | let dquant = (cbpc & 0x08) != 0; |
| 357 | let is_4x4 = (cbpc & 0x10) != 0; |
| 358 | if is_intra { |
| 359 | let cbpy = br.read_cb(&self.tables.cbpy_cb)?; |
| 360 | let cbp = (cbpy << 2) | (cbpc & 3); |
| 361 | if dquant { |
| 362 | q = read_dquant(br, q)?; |
| 363 | } |
| 364 | let binfo = BlockInfo::new(Type::I, cbp, q); |
| 365 | return Ok(binfo); |
| 366 | } |
| 367 | |
| 368 | let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?; |
| 369 | // if /* !aiv && */(cbpc & 3) != 3 { |
| 370 | cbpy ^= 0xF; |
| 371 | // } |
| 372 | let cbp = (cbpy << 2) | (cbpc & 3); |
| 373 | if dquant { |
| 374 | q = read_dquant(br, q)?; |
| 375 | } |
| 376 | let mut binfo = BlockInfo::new(Type::P, cbp, q); |
| 377 | if !is_4x4 { |
| 378 | let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?]; |
| 379 | binfo.set_mv(&mvec); |
| 380 | } else { |
| 381 | let mvec: [MV; 4] = [ |
| 382 | decode_mv(br, &self.tables.mv_cb)?, |
| 383 | decode_mv(br, &self.tables.mv_cb)?, |
| 384 | decode_mv(br, &self.tables.mv_cb)?, |
| 385 | decode_mv(br, &self.tables.mv_cb)? |
| 386 | ]; |
| 387 | binfo.set_mv(&mvec); |
| 388 | } |
| 389 | Ok(binfo) |
| 390 | }, |
| 391 | Type::B => { // B |
| 392 | let mut mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; |
| 393 | while mbtype == 14 { mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; } |
| 394 | |
| 395 | let is_coded = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_CODED) != 0; |
| 396 | let is_intra = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_INTRA) != 0; |
| 397 | let dquant = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_DQUANT) != 0; |
| 398 | let is_fwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_FORWARD) != 0; |
| 399 | let is_bwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_BACKWARD) != 0; |
| 400 | |
| 401 | let cbp = if is_coded { |
| 402 | let cbpc = br.read_cb(&self.tables.cbpc_b_cb)?; |
| 403 | let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?; |
| 404 | if !is_intra { cbpy ^= 0xF; } |
| 405 | (cbpy << 2) | (cbpc & 3) |
| 406 | } else { 0 }; |
| 407 | |
| 408 | if dquant { |
| 409 | q = read_dquant(br, q)?; |
| 410 | } |
| 411 | |
| 412 | if is_intra { |
| 413 | let binfo = BlockInfo::new(Type::I, cbp, q); |
| 414 | return Ok(binfo); |
| 415 | } |
| 416 | |
| 417 | let mut binfo = BlockInfo::new(Type::B, cbp, q); |
| 418 | if is_fwd { |
| 419 | let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?]; |
| 420 | binfo.set_mv(&mvec); |
| 421 | } |
| 422 | if is_bwd { |
| 423 | let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?]; |
| 424 | binfo.set_b_mv(&mvec); |
| 425 | } |
| 426 | Ok(binfo) |
| 427 | }, |
| 428 | _ => { unreachable!(); }, |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { |
| 433 | self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred()) |
| 434 | } |
| 435 | |
| 436 | #[allow(unused_variables)] |
| 437 | fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { |
| 438 | self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None) |
| 439 | } |
| 440 | |
| 441 | fn is_slice_end(&mut self) -> bool { false } |
| 442 | } |
| 443 | |
| 444 | impl<'a> RealVideo20BR<'a> { |
| 445 | #[allow(unused_variables)] |
| 446 | fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> { |
| 447 | validate!(self.slice_no < self.num_slices); |
| 448 | |
| 449 | let br = &mut self.br; |
| 450 | br.seek(self.slice_off[self.slice_no] * 8)?; |
| 451 | |
| 452 | let frm_type = br.read(2)?; |
| 453 | let ftype = match frm_type { |
| 454 | 0 | 1 => { Type::I }, |
| 455 | 2 => { Type::P }, |
| 456 | _ => { Type::B }, |
| 457 | }; |
| 458 | |
| 459 | let marker = br.read(1)?; |
| 460 | validate!(marker == 0); |
| 461 | let qscale = br.read(5)? as u8; |
| 462 | validate!(qscale > 0); |
| 463 | if self.minor_ver >= 2 { |
| 464 | br.skip(1)?; // loop filter |
| 465 | } |
| 466 | let seq = if self.minor_ver <= 1 { |
| 467 | br.read(8)? << 8 |
| 468 | } else { |
| 469 | br.read(13)? << 3 |
| 470 | }; |
| 471 | self.pts = seq as u16; |
| 472 | let w; |
| 473 | let h; |
| 474 | if self.rpr.present { |
| 475 | let rpr = br.read(self.rpr.bits)? as usize; |
| 476 | if rpr == 0 { |
| 477 | w = self.w; |
| 478 | h = self.h; |
| 479 | } else { |
| 480 | w = self.rpr.widths[rpr - 1]; |
| 481 | h = self.rpr.heights[rpr - 1]; |
| 482 | validate!((w != 0) && (h != 0)); |
| 483 | } |
| 484 | } else { |
| 485 | w = self.w; |
| 486 | h = self.h; |
| 487 | } |
| 488 | |
| 489 | let mb_pos = br.read(self.mb_pos_bits)? as usize; |
| 490 | let mb_x = mb_pos % self.mb_w; |
| 491 | let mb_y = mb_pos / self.mb_w; |
| 492 | |
| 493 | br.skip(1)?; // no rounding |
| 494 | |
| 495 | if (self.minor_ver <= 1) && (frm_type == 3) { |
| 496 | br.skip(5)?; |
| 497 | } |
| 498 | |
| 499 | Ok(RV20SliceInfo::new(ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h)) |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | impl RealVideo20Decoder { |
| 504 | fn new() -> Self { |
| 505 | let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC); |
| 506 | let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); |
| 507 | let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC); |
| 508 | let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); |
| 509 | let mut coderead = H263ShortCodeReader::new(H263_MBTYPE_B); |
| 510 | let mbtype_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); |
| 511 | let mut coderead = H263ShortCodeReader::new(H263_CBPY); |
| 512 | let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); |
| 513 | let mut coderead = H263ShortCodeReader::new(H263_CBPC_B); |
| 514 | let cbpc_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); |
| 515 | let mut coderead = H263RLCodeReader::new(H263_RL_CODES); |
| 516 | let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); |
| 517 | let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC); |
| 518 | let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); |
| 519 | let mut coderead = H263ShortCodeReader::new(H263_MV); |
| 520 | let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); |
| 521 | |
| 522 | let tables = Tables { |
| 523 | intra_mcbpc_cb, |
| 524 | inter_mcbpc_cb, |
| 525 | mbtype_b_cb, |
| 526 | cbpy_cb, |
| 527 | cbpc_b_cb, |
| 528 | rl_cb, |
| 529 | aic_rl_cb, |
| 530 | mv_cb, |
| 531 | }; |
| 532 | |
| 533 | RealVideo20Decoder{ |
| 534 | info: NACodecInfoRef::default(), |
| 535 | dec: H263BaseDecoder::new_b_frames(false), |
| 536 | tables, |
| 537 | w: 0, |
| 538 | h: 0, |
| 539 | minor_ver: 0, |
| 540 | rpr: RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] }, |
| 541 | bdsp: Box::new(RV20BlockDSP::default()), |
| 542 | base_ts: 0, |
| 543 | last_ts: 0, |
| 544 | next_ts: 0, |
| 545 | } |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | impl NADecoder for RealVideo20Decoder { |
| 550 | #[allow(unused_variables)] |
| 551 | fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { |
| 552 | if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { |
| 553 | let w = vinfo.get_width(); |
| 554 | let h = vinfo.get_height(); |
| 555 | let fmt = formats::YUV420_FORMAT; |
| 556 | let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt)); |
| 557 | self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref(); |
| 558 | self.w = w; |
| 559 | self.h = h; |
| 560 | |
| 561 | let edata = info.get_extradata().unwrap(); |
| 562 | let src: &[u8] = &edata; |
| 563 | let ver = ((src[4] as u32) << 12) | ((src[5] as u32) << 4) | ((src[6] as u32) >> 4); |
| 564 | let maj_ver = ver >> 16; |
| 565 | let min_ver = (ver >> 8) & 0xFF; |
| 566 | let mic_ver = ver & 0xFF; |
| 567 | validate!(maj_ver == 2); |
| 568 | self.minor_ver = min_ver as u8; |
| 569 | let rprb = src[1] & 7; |
| 570 | if rprb == 0 { |
| 571 | self.rpr.present = false; |
| 572 | } else { |
| 573 | self.rpr.present = true; |
| 574 | self.rpr.bits = ((rprb >> 1) + 1) as u8; |
| 575 | for i in 4..(src.len()/2) { |
| 576 | self.rpr.widths [i - 4] = (src[i * 2] as usize) * 4; |
| 577 | self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4; |
| 578 | } |
| 579 | } |
| 580 | Ok(()) |
| 581 | } else { |
| 582 | Err(DecoderError::InvalidData) |
| 583 | } |
| 584 | } |
| 585 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { |
| 586 | let src = pkt.get_buffer(); |
| 587 | |
| 588 | let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr); |
| 589 | |
| 590 | let bufinfo = self.dec.parse_frame(&mut ibr, self.bdsp.as_ref())?; |
| 591 | |
| 592 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo); |
| 593 | let ftype = self.dec.get_frame_type(); |
| 594 | let pts = ibr.pts; |
| 595 | if ftype != FrameType::B { |
| 596 | self.last_ts = self.next_ts; |
| 597 | self.next_ts = pts; |
| 598 | if self.last_ts > self.next_ts { |
| 599 | self.base_ts += 1 << 16; |
| 600 | } |
| 601 | } |
| 602 | let ts_diff = self.next_ts.wrapping_sub(pts); |
| 603 | let ts = self.base_ts + (self.next_ts as u64) - (ts_diff as u64); |
| 604 | frm.set_keyframe(self.dec.is_intra()); |
| 605 | frm.set_frame_type(ftype); |
| 606 | frm.set_pts(Some(ts >> 3)); |
| 607 | Ok(frm.into_ref()) |
| 608 | } |
| 609 | fn flush(&mut self) { |
| 610 | self.dec.flush(); |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | struct MBB { blocks: usize, bits: u8 } |
| 615 | const H263_MBB: &[MBB; 7] = &[ |
| 616 | MBB{ blocks: 47, bits: 6 }, |
| 617 | MBB{ blocks: 98, bits: 7 }, |
| 618 | MBB{ blocks: 395, bits: 9 }, |
| 619 | MBB{ blocks: 1583, bits: 11 }, |
| 620 | MBB{ blocks: 6335, bits: 13 }, |
| 621 | MBB{ blocks: 9215, bits: 14 }, |
| 622 | MBB{ blocks: 65536, bits: 14 }, |
| 623 | ]; |
| 624 | |
| 625 | pub fn get_decoder() -> Box<dyn NADecoder + Send> { |
| 626 | Box::new(RealVideo20Decoder::new()) |
| 627 | } |
| 628 | |
| 629 | #[cfg(test)] |
| 630 | mod test { |
| 631 | use nihav_core::codecs::RegisteredDecoders; |
| 632 | use nihav_core::demuxers::RegisteredDemuxers; |
| 633 | use nihav_codec_support::test::dec_video::*; |
| 634 | use crate::realmedia_register_all_codecs; |
| 635 | use crate::realmedia_register_all_demuxers; |
| 636 | #[test] |
| 637 | fn test_rv20() { |
| 638 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 639 | realmedia_register_all_demuxers(&mut dmx_reg); |
| 640 | let mut dec_reg = RegisteredDecoders::new(); |
| 641 | realmedia_register_all_codecs(&mut dec_reg); |
| 642 | |
| 643 | test_file_decoding("realmedia", "assets/RV/rv20_svt_atrc_640x352_realproducer_plus_8.51.rm", /*None*/Some(3000), true, false, None/*Some("rv20")*/, &dmx_reg, &dec_reg); |
| 644 | // test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(1000), true, false, Some("rv20")); |
| 645 | } |
| 646 | } |