1 use nihav_core::codecs::*;
2 use nihav_core::io::bitreader::*;
3 use nihav_codec_support::codecs::{MV, ZERO_MV};
4 use super::vpcommon::*;
6 pub const TOKEN_LARGE: u8 = 5;
7 pub const TOKEN_EOB: u8 = 42;
9 #[derive(Clone,Copy,Debug,Default)]
11 pub struct VP56Header {
15 pub multistream: bool,
16 pub use_huffman: bool,
28 #[derive(Clone,Copy,Default)]
29 pub struct VP56MVModel {
32 pub raw_probs: [u8; 8],
33 pub tree_probs: [u8; 7],
36 #[derive(Clone,Copy,Default)]
37 pub struct VP56MBTypeModel {
41 #[derive(Clone,Copy,Default)]
42 pub struct VP56CoeffModel {
43 pub dc_token_probs: [[[u8; 5]; 6]; 6],
44 pub dc_value_probs: [u8; 11],
45 pub ac_ctype_probs: [[[[u8; 5]; 5]; 6]; 3],
46 pub ac_type_probs: [[[[u8; 5]; 6]; 3]; 3],
47 pub ac_val_probs: [[[u8; 11]; 6]; 3],
50 pub struct VP6Models {
51 pub scan_order: [usize; 64],
52 pub scan: [usize; 64],
53 pub zigzag: [usize; 64],
54 pub zero_run_probs: [[u8; 14]; 2],
57 const MAX_HUFF_ELEMS: usize = 12;
58 #[derive(Clone,Copy,Default)]
60 pub codes: [u16; MAX_HUFF_ELEMS],
61 pub bits: [u8; MAX_HUFF_ELEMS],
64 #[derive(Clone,Copy,Default)]
72 fn prob2weight(a: u8, b: u8) -> u8 {
73 let w = ((u16::from(a) * u16::from(b)) >> 8) as u8;
82 fn build_codes(&mut self, probs: &[u8; 11]) {
83 let mut weights = [0u8; 12];
85 weights[11] = prob2weight( probs[0], probs[ 1]);
86 weights[ 0] = prob2weight( probs[0], !probs[ 1]);
87 weights[ 1] = prob2weight(!probs[0], probs[ 2]);
88 let lvroot = prob2weight(!probs[0], !probs[ 2]);
89 let tworoot = prob2weight( lvroot, probs[ 3]);
90 let hlroot = prob2weight( lvroot, !probs[ 3]);
91 weights[ 2] = prob2weight( tworoot, probs[ 4]);
92 let root34 = prob2weight( tworoot, !probs[ 4]);
93 weights[ 3] = prob2weight( root34, probs[ 5]);
94 weights[ 4] = prob2weight( root34, !probs[ 5]);
95 let c1root = prob2weight( hlroot, probs[ 6]);
96 let c34root = prob2weight( hlroot, !probs[ 6]);
97 weights[ 5] = prob2weight( c1root, probs[ 7]);
98 weights[ 6] = prob2weight( c1root, !probs[ 7]);
99 let c3root = prob2weight( c34root, probs[ 8]);
100 let c4root = prob2weight( c34root, !probs[ 8]);
101 weights[ 7] = prob2weight( c3root, probs[ 9]);
102 weights[ 8] = prob2weight( c3root, !probs[ 9]);
103 weights[ 9] = prob2weight( c4root, probs[10]);
104 weights[10] = prob2weight( c4root, !probs[10]);
106 self.build(&weights);
108 fn build_codes_zero_run(&mut self, probs: &[u8; 14]) {
109 let mut weights = [0u8; 9];
111 let root = prob2weight( probs[0], probs[1]);
112 weights[0] = prob2weight( root, probs[2]);
113 weights[1] = prob2weight( root, !probs[2]);
115 let root = prob2weight( probs[0], !probs[1]);
116 weights[2] = prob2weight( root, probs[3]);
117 weights[3] = prob2weight( root, !probs[3]);
119 let root = prob2weight(!probs[0], probs[4]);
120 weights[8] = prob2weight(!probs[0], !probs[4]);
121 let root1 = prob2weight( root, probs[5]);
122 let root2 = prob2weight( root, !probs[5]);
123 weights[4] = prob2weight( root1, probs[6]);
124 weights[5] = prob2weight( root1, !probs[6]);
125 weights[6] = prob2weight( root2, probs[7]);
126 weights[7] = prob2weight( root2, !probs[7]);
128 self.build(&weights);
130 fn build(&mut self, weights: &[u8]) {
131 let mut nodes = [Node::default(); MAX_HUFF_ELEMS * 2];
134 for w in weights.iter().rev() {
135 let weight = u16::from(*w);
138 if nodes[i].weight > weight {
143 for j in (pos..nlen).rev() {
144 nodes[j + 1] = nodes[j];
146 nodes[pos].weight = weight;
147 nodes[pos].sym = (weights.len() - nlen - 1) as i8;
154 weight: nodes[low + 0].weight + nodes[low + 1].weight,
161 while (pos < nlen) && (nodes[pos].weight < nnode.weight) {
164 for j in (pos..nlen).rev() {
165 nodes[j + 1] = nodes[j];
170 self.get_codes(&nodes, nlen - 1, 0, 0);
171 for i in nlen..self.codes.len() {
172 self.codes[i] = self.codes[0];
173 self.bits[i] = self.bits[0];
176 fn get_codes(&mut self, nodes: &[Node], pos: usize, code: u16, len: u8) {
177 if nodes[pos].sym >= 0 {
178 self.codes[nodes[pos].sym as usize] = code;
179 self.bits [nodes[pos].sym as usize] = len;
181 self.get_codes(nodes, nodes[pos].ch0, (code << 1) | 0, len + 1);
182 self.get_codes(nodes, nodes[pos].ch1, (code << 1) | 1, len + 1);
188 fn read_huff(&mut self, huff: &VP6Huff) -> DecoderResult<u8>;
191 impl<'a> ReadHuff for BitReader<'a> {
192 fn read_huff(&mut self, huff: &VP6Huff) -> DecoderResult<u8> {
193 let peekval = self.peek(16);
194 for (i, (code, bit)) in huff.codes.iter().zip(huff.bits.iter()).enumerate() {
195 if (peekval >> (16 - *bit)) == u32::from(*code) {
196 self.skip(u32::from(*bit))?;
200 Err(DecoderError::InvalidData)
204 #[derive(Clone,Copy,Default)]
205 pub struct VP6HuffModels {
206 pub dc_token_tree: [VP6Huff; 2],
207 pub ac_token_tree: [[[VP6Huff; 6]; 3]; 2],
208 pub zero_run_tree: [VP6Huff; 2],
217 zero_run_probs: [[0; 14]; 2],
222 pub struct VP56Models {
223 pub mv_models: [VP56MVModel; 2],
224 pub mbtype_models: [[VP56MBTypeModel; 10]; 3],
225 pub coeff_models: [VP56CoeffModel; 2],
226 pub prob_xmitted: [[u8; 20]; 3],
227 pub vp6models: VP6Models,
228 pub vp6huff: VP6HuffModels,
234 mv_models: [VP56MVModel::default(); 2],
235 mbtype_models: [[VP56MBTypeModel::default(); 10]; 3],
236 coeff_models: [VP56CoeffModel::default(); 2],
237 prob_xmitted: [[0; 20]; 3],
238 vp6models: VP6Models::new(),
239 vp6huff: VP6HuffModels::default(),
244 pub trait VP56Parser {
245 fn parse_header(&mut self, bc: &mut BoolCoder) -> DecoderResult<VP56Header>;
246 fn reset_models(&self, models: &mut VP56Models);
247 fn decode_mv(&self, bc: &mut BoolCoder, model: &VP56MVModel) -> i16;
248 fn decode_mv_models(&self, bc: &mut BoolCoder, models: &mut [VP56MVModel; 2]) -> DecoderResult<()>;
249 fn decode_coeff_models(&self, bc: &mut BoolCoder, models: &mut VP56Models, is_intra: bool) -> DecoderResult<()>;
250 fn decode_block(&self, bc: &mut BoolCoder, coeffs: &mut [i16; 64], model: &VP56CoeffModel, vp6model: &VP6Models, fstate: &mut FrameState) -> DecoderResult<()>;
251 fn decode_block_huff(&self, br: &mut BitReader, coeffs: &mut [i16; 64], vp6model: &VP6Models, model: &VP6HuffModels, fstate: &mut FrameState) -> DecoderResult<()>;
252 fn mc_block(&self, dst: &mut NASimpleVideoFrame<u8>, mc_buf: NAVideoBufferRef<u8>, src: NAVideoBufferRef<u8>, plane: usize, x: usize, y: usize, mv: MV, loop_thr: i16);
255 enum CoeffReader<'a> {
261 #[derive(Clone,Copy,Default)]
267 pub struct FrameState {
271 pub coeff_cat: [[u8; 64]; 4],
272 pub last_idx: [usize; 4],
277 pub dc_zero_run: [usize; 2],
278 pub ac_zero_run: [usize; 2],
287 coeff_cat: [[0; 64]; 4],
300 pub struct VP56DCPred {
314 const INVALID_REF: u8 = 42;
317 fn new() -> Self { Self::default() }
318 fn resize(&mut self, mb_w: usize) {
319 self.dc_y.resize(mb_w * 2 + 2, 0);
320 self.dc_u.resize(mb_w + 2, 0);
321 self.dc_v.resize(mb_w + 2, 0);
322 self.ref_y.resize(mb_w * 2 + 2, INVALID_REF);
323 self.ref_c.resize(mb_w + 2, INVALID_REF);
326 fn reset(&mut self) {
328 for el in self.ref_y.iter_mut().skip(1) { *el = INVALID_REF; }
329 for el in self.ref_c.iter_mut().skip(1) { *el = INVALID_REF; }
331 fn update_row(&mut self) {
337 self.ref_left = INVALID_REF;
339 fn next_mb(&mut self) {
345 pub struct VP56Decoder {
356 coeffs: [[i16; 64]; 6],
363 mb_info: Vec<MBInfo>,
366 last_dc: [[i16; 4]; 3],
367 top_ctx: [Vec<u8>; 4],
369 mc_buf: NAVideoBufferRef<u8>,
372 fn rescale_mb_mode_prob(prob: u32, total: u32) -> u8 {
373 (255 * prob / (1 + total)) as u8
376 fn map_mb_type(mbtype: VPMBType) -> usize {
378 VPMBType::InterNoMV => 0,
379 VPMBType::Intra => 1,
380 VPMBType::InterMV => 2,
381 VPMBType::InterNearest => 3,
382 VPMBType::InterNear => 4,
383 VPMBType::GoldenNoMV => 5,
384 VPMBType::GoldenMV => 6,
385 VPMBType::InterFourMV => 7,
386 VPMBType::GoldenNearest => 8,
387 VPMBType::GoldenNear => 9,
391 pub fn expand_token_bc(bc: &mut BoolCoder, val_probs: &[u8; 11], token: u8, version: u8) -> i16 {
392 let mut sign = false;
394 if token < TOKEN_LARGE {
396 sign = bc.read_bool();
398 level = i16::from(token);
400 let cat: usize = vp_tree!(bc, val_probs[6],
401 vp_tree!(bc, val_probs[7], 0, 1),
402 vp_tree!(bc, val_probs[8],
403 vp_tree!(bc, val_probs[9], 2, 3),
404 vp_tree!(bc, val_probs[10], 4, 5)));
406 sign = bc.read_bool();
409 let add_probs = &VP56_COEF_ADD_PROBS[cat];
410 for prob in add_probs.iter() {
411 if *prob == 128 { break; }
412 add = (add << 1) | (bc.read_prob(*prob) as i16);
415 sign = bc.read_bool();
417 level = VP56_COEF_BASE[cat] + add;
427 pub fn new(version: u8, has_alpha: bool, flip: bool) -> Self {
428 let vt = alloc_video_buffer(NAVideoInfo::new(24, 24, false, VP_YUVA420_FORMAT), 4).unwrap();
429 let mc_buf = vt.get_vbuf().unwrap();
431 version, has_alpha, flip,
432 shuf: VPShuffler::new(),
437 models: VP56Models::new(),
438 amodels: VP56Models::new(),
439 coeffs: [[0; 64]; 6],
440 last_mbt: VPMBType::InterNoMV,
447 fstate: FrameState::new(),
448 dc_pred: VP56DCPred::new(),
449 last_dc: [[0; 4]; 3],
450 top_ctx: [Vec::new(), Vec::new(), Vec::new(), Vec::new()],
455 fn set_dimensions(&mut self, width: usize, height: usize) {
457 self.height = height;
458 self.mb_w = (self.width + 15) >> 4;
459 self.mb_h = (self.height + 15) >> 4;
460 self.mb_info.resize(self.mb_w * self.mb_h, MBInfo::default());
461 self.top_ctx = [vec![0; self.mb_w * 2], vec![0; self.mb_w], vec![0; self.mb_w], vec![0; self.mb_w * 2]];
463 pub fn init(&mut self, supp: &mut NADecoderSupport, vinfo: NAVideoInfo) -> DecoderResult<()> {
464 supp.pool_u8.set_dec_bufs(3 + if vinfo.get_format().has_alpha() { 1 } else { 0 });
465 supp.pool_u8.prealloc_video(NAVideoInfo::new(vinfo.get_width(), vinfo.get_height(), false, vinfo.get_format()), 4)?;
466 self.set_dimensions(vinfo.get_width(), vinfo.get_height());
467 self.dc_pred.resize(self.mb_w);
470 pub fn flush(&mut self) {
473 pub fn decode_frame(&mut self, supp: &mut NADecoderSupport, src: &[u8], br: &mut dyn VP56Parser) -> DecoderResult<(NABufferType, FrameType)> {
477 validate!(src.len() >= 7);
478 aoffset = ((src[0] as usize) << 16) | ((src[1] as usize) << 8) | (src[2] as usize);
479 validate!((aoffset > 0) && (aoffset < src.len() - 3));
480 bc = BoolCoder::new(&src[3..])?;
482 validate!(src.len() >= 4);
484 bc = BoolCoder::new(src)?;
486 let hdr = br.parse_header(&mut bc)?;
487 validate!((hdr.offset as usize) < aoffset); //XXX: take alpha 3 byte offset into account?
490 self.set_dimensions((hdr.mb_w as usize) * 16, (hdr.mb_h as usize) * 16);
492 let fmt = if !self.has_alpha {
497 let vinfo = NAVideoInfo::new(self.width, self.height, self.flip, fmt);
498 let ret = supp.pool_u8.get_free();
500 return Err(DecoderError::AllocError);
502 let mut buf = ret.unwrap();
503 if buf.get_info() != vinfo {
505 supp.pool_u8.reset();
506 supp.pool_u8.prealloc_video(vinfo, 4)?;
507 let ret = supp.pool_u8.get_free();
509 return Err(DecoderError::AllocError);
513 let mut dframe = NASimpleVideoFrame::from_video_buf(&mut buf).unwrap();
518 if !self.shuf.has_refs() {
519 return Err(DecoderError::MissingReference);
523 let psrc = &src[if self.has_alpha { 3 } else { 0 }..aoffset];
524 self.decode_planes(br, &mut dframe, &mut bc, &hdr, psrc, false)?;
527 let asrc = &src[aoffset + 3..];
528 let mut bc = BoolCoder::new(asrc)?;
529 let ahdr = br.parse_header(&mut bc)?;
530 validate!(ahdr.mb_w == hdr.mb_w && ahdr.mb_h == hdr.mb_h);
531 std::mem::swap(&mut self.models, &mut self.amodels);
532 let ret = self.decode_planes(br, &mut dframe, &mut bc, &ahdr, asrc, true);
533 std::mem::swap(&mut self.models, &mut self.amodels);
534 if let Err(err) = ret {
537 match (hdr.is_golden, ahdr.is_golden) {
538 (true, true) => { self.shuf.add_golden_frame(buf.clone()); },
540 let cur_golden = self.shuf.get_golden().unwrap();
541 let off = cur_golden.get_offset(3);
542 let stride = cur_golden.get_stride(3);
543 let mut new_golden = supp.pool_u8.get_copy(&buf).unwrap();
544 let dst = new_golden.get_data_mut().unwrap();
545 let src = cur_golden.get_data();
546 dst[off..][..stride * self.mb_h * 16].copy_from_slice(&src[off..][..stride * self.mb_h * 16]);
547 self.shuf.add_golden_frame(new_golden);
550 let cur_golden = self.shuf.get_golden().unwrap();
551 let off = cur_golden.get_offset(3);
552 let stride = cur_golden.get_stride(3);
553 let mut new_golden = supp.pool_u8.get_copy(&cur_golden).unwrap();
554 let dst = new_golden.get_data_mut().unwrap();
555 let src = buf.get_data();
556 dst[off..][..stride * self.mb_h * 16].copy_from_slice(&src[off..][..stride * self.mb_h * 16]);
557 self.shuf.add_golden_frame(new_golden);
563 if hdr.is_golden && !self.has_alpha {
564 self.shuf.add_golden_frame(buf.clone());
566 self.shuf.add_frame(buf.clone());
568 Ok((NABufferType::Video(buf), if hdr.is_intra { FrameType::I } else { FrameType::P }))
570 fn decode_planes(&mut self, br: &mut dyn VP56Parser, dframe: &mut NASimpleVideoFrame<u8>, bc: &mut BoolCoder, hdr: &VP56Header, src: &[u8], alpha: bool) -> DecoderResult<()> {
573 let off = hdr.offset as usize;
574 if !hdr.use_huffman {
575 let bc2 = BoolCoder::new(&src[off..])?;
576 cr = CoeffReader::Bool(bc2);
578 let br = BitReader::new(&src[off..], BitReaderMode::BE);
579 cr = CoeffReader::Huff(br);
582 cr = CoeffReader::None;
586 br.reset_models(&mut self.models);
587 self.reset_mbtype_models();
589 self.decode_mode_prob_models(bc)?;
590 br.decode_mv_models(bc, &mut self.models.mv_models)?;
592 br.decode_coeff_models(bc, &mut self.models, hdr.is_intra)?;
595 self.models.vp6huff.dc_token_tree[i].build_codes(&self.models.coeff_models[i].dc_value_probs);
600 self.models.vp6huff.ac_token_tree[i][mode][band].build_codes(&self.models.coeff_models[i].ac_val_probs[mode][band]);
605 self.models.vp6huff.zero_run_tree[i].build_codes_zero_run(&self.models.vp6models.zero_run_probs[i]);
610 self.ilace_prob = bc.read_bits(8) as u8;
613 self.fstate = FrameState::new();
614 self.fstate.dc_quant = VP56_DC_QUANTS[hdr.quant as usize] * 4;
615 self.fstate.ac_quant = VP56_AC_QUANTS[hdr.quant as usize] * 4;
616 self.loop_thr = i16::from(VP56_FILTER_LIMITS[hdr.quant as usize]);
618 self.last_mbt = VPMBType::InterNoMV;
619 for vec in self.top_ctx.iter_mut() {
620 for el in vec.iter_mut() {
624 self.last_dc = [[0; 4]; 3];
625 self.last_dc[0][1] = 0x80;
626 self.last_dc[0][2] = 0x80;
627 self.dc_pred.reset();
629 self.ilace_mb = false;
630 for mb_y in 0..self.mb_h {
631 self.fstate.mb_y = mb_y;
632 self.fstate.coeff_cat = [[0; 64]; 4];
633 self.fstate.last_idx = [24; 4];
634 for mb_x in 0..self.mb_w {
635 self.fstate.mb_x = mb_x;
636 self.decode_mb(dframe, bc, &mut cr, br, &hdr, alpha)?;
637 self.dc_pred.next_mb();
639 self.dc_pred.update_row();
643 fn reset_mbtype_models(&mut self) {
644 const DEFAULT_XMITTED_PROBS: [[u8; 20]; 3] = [
645 [ 42, 69, 2, 1, 7, 1, 42, 44, 22, 6, 3, 1, 2, 0, 5, 1, 1, 0, 0, 0 ],
646 [ 8, 229, 1, 1, 8, 0, 0, 0, 0, 0, 2, 1, 1, 0, 0, 0, 1, 1, 0, 0 ],
647 [ 35, 122, 1, 1, 6, 1, 34, 46, 0, 0, 2, 1, 1, 0, 1, 0, 1, 1, 0, 0 ]
649 self.models.prob_xmitted.copy_from_slice(&DEFAULT_XMITTED_PROBS);
651 fn decode_mode_prob_models(&mut self, bc: &mut BoolCoder) -> DecoderResult<()> {
653 if bc.read_prob(174) {
654 let idx = bc.read_bits(4) as usize;
656 self.models.prob_xmitted[ctx][i ^ 1] = VP56_MODE_VQ[ctx][idx][i];
659 if bc.read_prob(254) {
661 if bc.read_prob(205) {
662 let sign = bc.read_bool();
663 let diff = vp_tree!(bc, 171,
664 vp_tree!(bc, 83, 2, 1),
668 vp_tree!(bc, 104, 6, 5),
675 validate!(diff < 256);
676 let diff = diff as u8;
678 validate!(self.models.prob_xmitted[ctx][set ^ 1] <= 255 - diff);
679 self.models.prob_xmitted[ctx][set ^ 1] += diff;
681 validate!(self.models.prob_xmitted[ctx][set ^ 1] >= diff);
682 self.models.prob_xmitted[ctx][set ^ 1] -= diff;
689 let prob_xmitted = &self.models.prob_xmitted[ctx];
691 let mdl = &mut self.models.mbtype_models[ctx][mode];
692 let mut cnt = [0u32; 10];
695 if i == mode { continue; }
696 cnt[i] = 100 * u32::from(prob_xmitted[i * 2]);
699 let sum = u32::from(prob_xmitted[mode * 2]) + u32::from(prob_xmitted[mode * 2 + 1]);
700 mdl.probs[9] = 255 - rescale_mb_mode_prob(u32::from(prob_xmitted[mode * 2 + 1]), sum);
702 let inter_mv0_weight = (cnt[0] as u32) + (cnt[2] as u32);
703 let inter_mv1_weight = (cnt[3] as u32) + (cnt[4] as u32);
704 let gold_mv0_weight = (cnt[5] as u32) + (cnt[6] as u32);
705 let gold_mv1_weight = (cnt[8] as u32) + (cnt[9] as u32);
706 let mix_weight = (cnt[1] as u32) + (cnt[7] as u32);
707 mdl.probs[0] = 1 + rescale_mb_mode_prob(inter_mv0_weight + inter_mv1_weight, total);
708 mdl.probs[1] = 1 + rescale_mb_mode_prob(inter_mv0_weight, inter_mv0_weight + inter_mv1_weight);
709 mdl.probs[2] = 1 + rescale_mb_mode_prob(mix_weight, mix_weight + gold_mv0_weight + gold_mv1_weight);
710 mdl.probs[3] = 1 + rescale_mb_mode_prob(cnt[0] as u32, inter_mv0_weight);
711 mdl.probs[4] = 1 + rescale_mb_mode_prob(cnt[3] as u32, inter_mv1_weight);
712 mdl.probs[5] = 1 + rescale_mb_mode_prob(cnt[1], mix_weight);
713 mdl.probs[6] = 1 + rescale_mb_mode_prob(gold_mv0_weight, gold_mv0_weight + gold_mv1_weight);
714 mdl.probs[7] = 1 + rescale_mb_mode_prob(cnt[5], gold_mv0_weight);
715 mdl.probs[8] = 1 + rescale_mb_mode_prob(cnt[8], gold_mv1_weight);
720 fn find_mv_pred(&self, ref_id: u8) -> (usize, MV, MV, MV) {
721 const CAND_POS: [(i8, i8); 12] = [
730 let mut nearest_mv = ZERO_MV;
731 let mut near_mv = ZERO_MV;
732 let mut pred_mv = ZERO_MV;
733 let mut num_mv: usize = 0;
735 for (i, (yoff, xoff)) in CAND_POS.iter().enumerate() {
736 let cx = (self.fstate.mb_x as isize) + (*xoff as isize);
737 let cy = (self.fstate.mb_y as isize) + (*yoff as isize);
738 if (cx < 0) || (cy < 0) {
741 let cx = cx as usize;
742 let cy = cy as usize;
743 if (cx >= self.mb_w) || (cy >= self.mb_h) {
746 let mb_pos = cx + cy * self.mb_w;
747 let mv = self.mb_info[mb_pos].mv;
748 if (self.mb_info[mb_pos].mb_type.get_ref_id() != ref_id) || (mv == ZERO_MV) {
754 if (self.version > 5) && (i < 2) {
757 } else if mv != nearest_mv {
764 (num_mv, nearest_mv, near_mv, pred_mv)
766 fn decode_mv(&self, bc: &mut BoolCoder, br: &mut dyn VP56Parser) -> MV {
767 let x = br.decode_mv(bc, &self.models.mv_models[0]);
768 let y = br.decode_mv(bc, &self.models.mv_models[1]);
771 fn decode_mb_type(&mut self, bc: &mut BoolCoder, ctx: usize) -> DecoderResult<VPMBType> {
772 let probs = &self.models.mbtype_models[ctx][map_mb_type(self.last_mbt)].probs;
773 if !bc.read_prob(probs[9]) {
774 self.last_mbt = vp_tree!(
776 vp_tree!(bc, probs[1],
777 vp_tree!(bc, probs[3], VPMBType::InterNoMV, VPMBType::InterMV),
778 vp_tree!(bc, probs[4], VPMBType::InterNearest, VPMBType::InterNear)
780 vp_tree!(bc, probs[2],
781 vp_tree!(bc, probs[5], VPMBType::Intra, VPMBType::InterFourMV),
782 vp_tree!(bc, probs[6],
783 vp_tree!(bc, probs[7], VPMBType::GoldenNoMV, VPMBType::GoldenMV),
784 vp_tree!(bc, probs[8], VPMBType::GoldenNearest, VPMBType::GoldenNear)
791 #[allow(clippy::cognitive_complexity)]
792 fn decode_mb(&mut self, frm: &mut NASimpleVideoFrame<u8>, bc: &mut BoolCoder, cr: &mut CoeffReader, br: &mut dyn VP56Parser, hdr: &VP56Header, alpha: bool) -> DecoderResult<()> {
793 const FOURMV_SUB_TYPE: [VPMBType; 4] = [ VPMBType::InterNoMV, VPMBType::InterMV, VPMBType::InterNearest, VPMBType::InterNear ];
795 let mb_x = self.fstate.mb_x;
796 let mb_y = self.fstate.mb_y;
797 self.coeffs = [[0; 64]; 6];
798 let mb_pos = mb_x + mb_y * self.mb_w;
799 let mut four_mv = [ZERO_MV; 4];
800 let mut four_mbt = [VPMBType::Intra; 4];
803 let iprob = self.ilace_prob;
804 let prob = if mb_x == 0 {
806 } else if !self.ilace_mb {
807 iprob + (((256 - u16::from(iprob)) >> 1) as u8)
811 self.ilace_mb = bc.read_prob(prob);
814 let (num_mv, nearest_mv, near_mv, pred_mv) = if hdr.is_intra {
815 (0, ZERO_MV, ZERO_MV, ZERO_MV)
816 } else { self.find_mv_pred(VP_REF_INTER) };
817 let mb_type = if hdr.is_intra {
820 self.decode_mb_type(bc, (num_mv + 1) % 3)?
822 self.mb_info[mb_pos].mb_type = mb_type;
823 if mb_type.get_ref_id() != VP_REF_GOLDEN {
826 VPMBType::InterNoMV => {
827 self.mb_info[mb_pos].mv = ZERO_MV;
829 VPMBType::InterMV => {
830 let diff_mv = self.decode_mv(bc, br);
831 self.mb_info[mb_pos].mv = pred_mv + diff_mv;
833 VPMBType::InterNearest => {
834 self.mb_info[mb_pos].mv = nearest_mv;
836 VPMBType::InterNear => {
837 self.mb_info[mb_pos].mv = near_mv;
839 VPMBType::InterFourMV => {
841 four_mbt[i] = FOURMV_SUB_TYPE[bc.read_bits(2) as usize];
845 VPMBType::InterNoMV => {},
846 VPMBType::InterMV => {
847 let diff_mv = self.decode_mv(bc, br);
848 four_mv[i] = pred_mv + diff_mv;
850 VPMBType::InterNearest => {
851 four_mv[i] = nearest_mv;
853 VPMBType::InterNear => {
854 four_mv[i] = near_mv;
859 self.mb_info[mb_pos].mv = four_mv[3];
864 let (_num_mv, nearest_mv, near_mv, pred_mv) = self.find_mv_pred(VP_REF_GOLDEN);
866 VPMBType::GoldenNoMV => {
867 self.mb_info[mb_pos].mv = ZERO_MV;
869 VPMBType::GoldenMV => {
870 let diff_mv = self.decode_mv(bc, br);
871 self.mb_info[mb_pos].mv = pred_mv + diff_mv;
873 VPMBType::GoldenNearest => {
874 self.mb_info[mb_pos].mv = nearest_mv;
876 VPMBType::GoldenNear => {
877 self.mb_info[mb_pos].mv = near_mv;
882 if !mb_type.is_intra() && (mb_type != VPMBType::InterFourMV) {
883 self.do_mc(br, frm, mb_type, self.mb_info[mb_pos].mv, alpha);
884 } else if mb_type == VPMBType::InterFourMV {
885 self.do_fourmv(br, frm, &four_mv, alpha);
889 self.fstate.plane = if !alpha { 0 } else { 3 };
890 self.fstate.ctx_idx = blk_no >> 1;
891 self.fstate.top_ctx = self.top_ctx[self.fstate.plane][mb_x * 2 + (blk_no & 1)];
893 CoeffReader::None => {
894 br.decode_block(bc, &mut self.coeffs[blk_no], &self.models.coeff_models[0], &self.models.vp6models, &mut self.fstate)?;
896 CoeffReader::Bool(ref mut bcc) => {
897 br.decode_block(bcc, &mut self.coeffs[blk_no], &self.models.coeff_models[0], &self.models.vp6models, &mut self.fstate)?;
899 CoeffReader::Huff(ref mut brc) => {
900 br.decode_block_huff(brc, &mut self.coeffs[blk_no], &self.models.vp6models, &self.models.vp6huff, &mut self.fstate)?;
903 self.top_ctx[self.fstate.plane][mb_x * 2 + (blk_no & 1)] = self.fstate.top_ctx;
904 self.predict_dc(mb_type, mb_pos, blk_no, alpha);
906 let bx = mb_x * 2 + (blk_no & 1);
907 let by = mb_y * 2 + (blk_no >> 1);
908 let has_ac = self.fstate.last_idx[self.fstate.ctx_idx] > 0;
909 if mb_type.is_intra() {
912 vp_put_block(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
914 vp_put_block_dc(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
917 vp_put_block_ilace(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
922 vp_add_block(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
924 vp_add_block_dc(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
927 vp_add_block_ilace(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
932 self.fstate.plane = blk_no - 3;
933 self.fstate.ctx_idx = blk_no - 2;
934 self.fstate.top_ctx = self.top_ctx[self.fstate.plane][mb_x];
936 CoeffReader::None => {
937 br.decode_block(bc, &mut self.coeffs[blk_no], &self.models.coeff_models[1], &self.models.vp6models, &mut self.fstate)?;
939 CoeffReader::Bool(ref mut bcc) => {
940 br.decode_block(bcc, &mut self.coeffs[blk_no], &self.models.coeff_models[1], &self.models.vp6models, &mut self.fstate)?;
942 CoeffReader::Huff(ref mut brc) => {
943 br.decode_block_huff(brc, &mut self.coeffs[blk_no], &self.models.vp6models, &self.models.vp6huff, &mut self.fstate)?;
946 self.top_ctx[self.fstate.plane][mb_x] = self.fstate.top_ctx;
947 self.predict_dc(mb_type, mb_pos, blk_no, alpha);
949 let has_ac = self.fstate.last_idx[self.fstate.ctx_idx] > 0;
950 if mb_type.is_intra() {
952 vp_put_block(&mut self.coeffs[blk_no], mb_x, mb_y, self.fstate.plane, frm);
954 vp_put_block_dc(&mut self.coeffs[blk_no], mb_x, mb_y, self.fstate.plane, frm);
958 vp_add_block(&mut self.coeffs[blk_no], mb_x, mb_y, self.fstate.plane, frm);
960 vp_add_block_dc(&mut self.coeffs[blk_no], mb_x, mb_y, self.fstate.plane, frm);
967 fn do_mc(&mut self, br: &dyn VP56Parser, frm: &mut NASimpleVideoFrame<u8>, mb_type: VPMBType, mv: MV, alpha: bool) {
968 let x = self.fstate.mb_x * 16;
969 let y = self.fstate.mb_y * 16;
970 let plane = if !alpha { 0 } else { 3 };
971 let src = if mb_type.get_ref_id() == VP_REF_INTER {
972 self.shuf.get_last().unwrap()
974 self.shuf.get_golden().unwrap()
977 br.mc_block(frm, self.mc_buf.clone(), src.clone(), plane, x + 0, y + 0, mv, self.loop_thr);
978 br.mc_block(frm, self.mc_buf.clone(), src.clone(), plane, x + 8, y + 0, mv, self.loop_thr);
979 br.mc_block(frm, self.mc_buf.clone(), src.clone(), plane, x + 0, y + 8, mv, self.loop_thr);
980 br.mc_block(frm, self.mc_buf.clone(), src.clone(), plane, x + 8, y + 8, mv, self.loop_thr);
982 let x = self.fstate.mb_x * 8;
983 let y = self.fstate.mb_y * 8;
984 br.mc_block(frm, self.mc_buf.clone(), src.clone(), 1, x, y, mv, self.loop_thr);
985 br.mc_block(frm, self.mc_buf.clone(), src, 2, x, y, mv, self.loop_thr);
988 fn do_fourmv(&mut self, br: &dyn VP56Parser, frm: &mut NASimpleVideoFrame<u8>, mvs: &[MV; 4], alpha: bool) {
989 let x = self.fstate.mb_x * 16;
990 let y = self.fstate.mb_y * 16;
991 let plane = if !alpha { 0 } else { 3 };
992 let src = self.shuf.get_last().unwrap();
994 br.mc_block(frm, self.mc_buf.clone(), src.clone(),
995 plane, x + (blk_no & 1) * 8, y + (blk_no & 2) * 4,
996 mvs[blk_no], self.loop_thr);
999 let x = self.fstate.mb_x * 8;
1000 let y = self.fstate.mb_y * 8;
1001 let sum = mvs[0] + mvs[1] + mvs[2] + mvs[3];
1002 let mv = MV { x: sum.x / 4, y: sum.y / 4 };
1003 br.mc_block(frm, self.mc_buf.clone(), src.clone(), 1, x, y, mv, self.loop_thr);
1004 br.mc_block(frm, self.mc_buf.clone(), src, 2, x, y, mv, self.loop_thr);
1007 fn predict_dc(&mut self, mb_type: VPMBType, _mb_pos: usize, blk_no: usize, _alpha: bool) {
1008 let is_luma = blk_no < 4;
1009 let (plane, dcs) = match blk_no {
1010 4 => (1, &mut self.dc_pred.dc_u),
1011 5 => (2, &mut self.dc_pred.dc_v),
1012 _ => (0, &mut self.dc_pred.dc_y),
1014 let (dc_ref, dc_idx) = if is_luma {
1015 (&mut self.dc_pred.ref_y, self.dc_pred.y_idx + (blk_no & 1))
1017 (&mut self.dc_pred.ref_c, self.dc_pred.c_idx)
1019 let ref_id = mb_type.get_ref_id();
1020 let mut dc_pred = 0;
1022 let has_left_blk = is_luma && ((blk_no & 1) == 1);
1023 if has_left_blk || self.dc_pred.ref_left == ref_id {
1024 dc_pred += match blk_no {
1025 0 | 1 => self.dc_pred.ldc_y[0],
1026 2 | 3 => self.dc_pred.ldc_y[1],
1027 4 => self.dc_pred.ldc_u,
1028 _ => self.dc_pred.ldc_v,
1032 if dc_ref[dc_idx] == ref_id {
1033 dc_pred += dcs[dc_idx];
1036 if self.version == 5 {
1037 if (count < 2) && (dc_ref[dc_idx - 1] == ref_id) {
1038 dc_pred += dcs[dc_idx - 1];
1041 if (count < 2) && (dc_ref[dc_idx + 1] == ref_id) {
1042 dc_pred += dcs[dc_idx + 1];
1047 dc_pred = self.last_dc[ref_id as usize][plane];
1048 } else if count == 2 {
1051 self.coeffs[blk_no][0] += dc_pred;
1053 let dc = self.coeffs[blk_no][0];
1054 if blk_no != 4 { // update top block reference only for the second chroma component
1055 dc_ref[dc_idx] = ref_id;
1059 self.dc_pred.ldc_y[0] = dc;
1062 self.dc_pred.ldc_y[1] = dc;
1065 self.dc_pred.ldc_u = dc;
1068 self.dc_pred.ldc_v = dc;
1069 self.dc_pred.ref_left = ref_id;
1074 self.last_dc[ref_id as usize][plane] = dc;
1075 self.coeffs[blk_no][0] = self.coeffs[blk_no][0].wrapping_mul(self.fstate.dc_quant);
1079 const VP56_DC_QUANTS: [i16; 64] = [
1080 47, 47, 47, 47, 45, 43, 43, 43,
1081 43, 43, 42, 41, 41, 40, 40, 40,
1082 40, 35, 35, 35, 35, 33, 33, 33,
1083 33, 32, 32, 32, 27, 27, 26, 26,
1084 25, 25, 24, 24, 23, 23, 19, 19,
1085 19, 19, 18, 18, 17, 16, 16, 16,
1086 16, 16, 15, 11, 11, 11, 10, 10,
1087 9, 8, 7, 5, 3, 3, 2, 2
1089 const VP56_AC_QUANTS: [i16; 64] = [
1090 94, 92, 90, 88, 86, 82, 78, 74,
1091 70, 66, 62, 58, 54, 53, 52, 51,
1092 50, 49, 48, 47, 46, 45, 44, 43,
1093 42, 40, 39, 37, 36, 35, 34, 33,
1094 32, 31, 30, 29, 28, 27, 26, 25,
1095 24, 23, 22, 21, 20, 19, 18, 17,
1096 16, 15, 14, 13, 12, 11, 10, 9,
1097 8, 7, 6, 5, 4, 3, 2, 1
1100 const VP56_FILTER_LIMITS: [u8; 64] = [
1101 14, 14, 13, 13, 12, 12, 10, 10,
1102 10, 10, 8, 8, 8, 8, 8, 8,
1103 8, 8, 8, 8, 8, 8, 8, 8,
1104 8, 8, 8, 8, 8, 8, 8, 8,
1105 8, 8, 8, 8, 7, 7, 7, 7,
1106 7, 7, 6, 6, 6, 6, 6, 6,
1107 5, 5, 5, 5, 4, 4, 4, 4,
1108 4, 4, 4, 3, 3, 3, 3, 2
1111 const VP56_MODE_VQ: [[[u8; 20]; 16]; 3] = [
1113 [ 9, 15, 32, 25, 7, 19, 9, 21, 1, 12, 14, 12, 3, 18, 14, 23, 3, 10, 0, 4 ],
1114 [ 48, 39, 1, 2, 11, 27, 29, 44, 7, 27, 1, 4, 0, 3, 1, 6, 1, 2, 0, 0 ],
1115 [ 21, 32, 1, 2, 4, 10, 32, 43, 6, 23, 2, 3, 1, 19, 1, 6, 12, 21, 0, 7 ],
1116 [ 69, 83, 0, 0, 0, 2, 10, 29, 3, 12, 0, 1, 0, 3, 0, 3, 2, 2, 0, 0 ],
1117 [ 11, 20, 1, 4, 18, 36, 43, 48, 13, 35, 0, 2, 0, 5, 3, 12, 1, 2, 0, 0 ],
1118 [ 70, 44, 0, 1, 2, 10, 37, 46, 8, 26, 0, 2, 0, 2, 0, 2, 0, 1, 0, 0 ],
1119 [ 8, 15, 0, 1, 8, 21, 74, 53, 22, 42, 0, 1, 0, 2, 0, 3, 1, 2, 0, 0 ],
1120 [ 141, 42, 0, 0, 1, 4, 11, 24, 1, 11, 0, 1, 0, 1, 0, 2, 0, 0, 0, 0 ],
1121 [ 8, 19, 4, 10, 24, 45, 21, 37, 9, 29, 0, 3, 1, 7, 11, 25, 0, 2, 0, 1 ],
1122 [ 46, 42, 0, 1, 2, 10, 54, 51, 10, 30, 0, 2, 0, 2, 0, 1, 0, 1, 0, 0 ],
1123 [ 28, 32, 0, 0, 3, 10, 75, 51, 14, 33, 0, 1, 0, 2, 0, 1, 1, 2, 0, 0 ],
1124 [ 100, 46, 0, 1, 3, 9, 21, 37, 5, 20, 0, 1, 0, 2, 1, 2, 0, 1, 0, 0 ],
1125 [ 27, 29, 0, 1, 9, 25, 53, 51, 12, 34, 0, 1, 0, 3, 1, 5, 0, 2, 0, 0 ],
1126 [ 80, 38, 0, 0, 1, 4, 69, 33, 5, 16, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0 ],
1127 [ 16, 20, 0, 0, 2, 8, 104, 49, 15, 33, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0 ],
1128 [ 194, 16, 0, 0, 1, 1, 1, 9, 1, 3, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 ],
1130 [ 41, 22, 1, 0, 1, 31, 0, 0, 0, 0, 0, 1, 1, 7, 0, 1, 98, 25, 4, 10 ],
1131 [ 123, 37, 6, 4, 1, 27, 0, 0, 0, 0, 5, 8, 1, 7, 0, 1, 12, 10, 0, 2 ],
1132 [ 26, 14, 14, 12, 0, 24, 0, 0, 0, 0, 55, 17, 1, 9, 0, 36, 5, 7, 1, 3 ],
1133 [ 209, 5, 0, 0, 0, 27, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0 ],
1134 [ 2, 5, 4, 5, 0, 121, 0, 0, 0, 0, 0, 3, 2, 4, 1, 4, 2, 2, 0, 1 ],
1135 [ 175, 5, 0, 1, 0, 48, 0, 0, 0, 0, 0, 2, 0, 1, 0, 2, 0, 1, 0, 0 ],
1136 [ 83, 5, 2, 3, 0, 102, 0, 0, 0, 0, 1, 3, 0, 2, 0, 1, 0, 0, 0, 0 ],
1137 [ 233, 6, 0, 0, 0, 8, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0 ],
1138 [ 34, 16, 112, 21, 1, 28, 0, 0, 0, 0, 6, 8, 1, 7, 0, 3, 2, 5, 0, 2 ],
1139 [ 159, 35, 2, 2, 0, 25, 0, 0, 0, 0, 3, 6, 0, 5, 0, 1, 4, 4, 0, 1 ],
1140 [ 75, 39, 5, 7, 2, 48, 0, 0, 0, 0, 3, 11, 2, 16, 1, 4, 7, 10, 0, 2 ],
1141 [ 212, 21, 0, 1, 0, 9, 0, 0, 0, 0, 1, 2, 0, 2, 0, 0, 2, 2, 0, 0 ],
1142 [ 4, 2, 0, 0, 0, 172, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 2, 0, 0, 0 ],
1143 [ 187, 22, 1, 1, 0, 17, 0, 0, 0, 0, 3, 6, 0, 4, 0, 1, 4, 4, 0, 1 ],
1144 [ 133, 6, 1, 2, 1, 70, 0, 0, 0, 0, 0, 2, 0, 4, 0, 3, 1, 1, 0, 0 ],
1145 [ 251, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ],
1147 [ 2, 3, 2, 3, 0, 2, 0, 2, 0, 0, 11, 4, 1, 4, 0, 2, 3, 2, 0, 4 ],
1148 [ 49, 46, 3, 4, 7, 31, 42, 41, 0, 0, 2, 6, 1, 7, 1, 4, 2, 4, 0, 1 ],
1149 [ 26, 25, 1, 1, 2, 10, 67, 39, 0, 0, 1, 1, 0, 14, 0, 2, 31, 26, 1, 6 ],
1150 [ 103, 46, 1, 2, 2, 10, 33, 42, 0, 0, 1, 4, 0, 3, 0, 1, 1, 3, 0, 0 ],
1151 [ 14, 31, 9, 13, 14, 54, 22, 29, 0, 0, 2, 6, 4, 18, 6, 13, 1, 5, 0, 1 ],
1152 [ 85, 39, 0, 0, 1, 9, 69, 40, 0, 0, 0, 1, 0, 3, 0, 1, 2, 3, 0, 0 ],
1153 [ 31, 28, 0, 0, 3, 14, 130, 34, 0, 0, 0, 1, 0, 3, 0, 1, 3, 3, 0, 1 ],
1154 [ 171, 25, 0, 0, 1, 5, 25, 21, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0 ],
1155 [ 17, 21, 68, 29, 6, 15, 13, 22, 0, 0, 6, 12, 3, 14, 4, 10, 1, 7, 0, 3 ],
1156 [ 51, 39, 0, 1, 2, 12, 91, 44, 0, 0, 0, 2, 0, 3, 0, 1, 2, 3, 0, 1 ],
1157 [ 81, 25, 0, 0, 2, 9, 106, 26, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0 ],
1158 [ 140, 37, 0, 1, 1, 8, 24, 33, 0, 0, 1, 2, 0, 2, 0, 1, 1, 2, 0, 0 ],
1159 [ 14, 23, 1, 3, 11, 53, 90, 31, 0, 0, 0, 3, 1, 5, 2, 6, 1, 2, 0, 0 ],
1160 [ 123, 29, 0, 0, 1, 7, 57, 30, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0 ],
1161 [ 13, 14, 0, 0, 4, 20, 175, 20, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0 ],
1162 [ 202, 23, 0, 0, 1, 3, 2, 9, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0 ],