2 use nihav_core::codecs::DecoderError;
3 use nihav_core::frame::*;
5 use super::super::blockdsp;
7 use super::code::{H263_INTERP_FUNCS, obmc_filter};
8 use super::data::H263_CHROMA_ROUND;
9 use nihav_core::formats;
22 fn new() -> Self { MVInfo{ mv: Vec::new(), mb_w: 0, mb_stride: 0, mb_start: 0, top: true, mvmode: MVMode::Old } }
23 fn reset(&mut self, mb_w: usize, mb_start: usize, mvmode: MVMode) {
24 self.mb_start = mb_start;
26 self.mb_stride = mb_w * 2 + 2;
27 self.mv.resize(self.mb_stride * 3, ZERO_MV);
30 fn update_row(&mut self) {
31 self.mb_start = self.mb_w + 1;
33 for i in 0..self.mb_stride {
34 self.mv[i] = self.mv[self.mb_stride * 2 + i];
37 #[allow(non_snake_case)]
38 fn predict(&mut self, mb_x: usize, blk_no: usize, use4: bool, diff: MV, first_line: bool, first_mb: bool) -> MV {
42 let last = mb_x == self.mb_w - 1;
45 if mb_x != self.mb_start {
46 A = if !first_mb { self.mv[self.mb_stride + mb_x * 2 - 1] } else { ZERO_MV };
47 B = if !first_line { self.mv[ mb_x * 2] } else { A };
48 C = if !first_line && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV };
50 A = ZERO_MV; B = ZERO_MV; C = ZERO_MV;
54 A = self.mv[self.mb_stride + mb_x * 2];
55 B = if !first_line { self.mv[mb_x * 2 + 1] } else { A };
56 C = if !first_line && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV/*A*/ };
59 A = if mb_x != self.mb_start { self.mv[self.mb_stride * 2 + mb_x * 2 - 1] } else { ZERO_MV };
60 B = self.mv[self.mb_stride + mb_x * 2];
61 C = self.mv[self.mb_stride + mb_x * 2 + 1];
64 A = self.mv[self.mb_stride * 2 + mb_x * 2];
65 B = self.mv[self.mb_stride * 1 + mb_x * 2 + 1];
66 C = self.mv[self.mb_stride * 1 + mb_x * 2];
68 _ => { return ZERO_MV; }
70 let pred_mv = MV::pred(A, B, C);
71 let new_mv = MV::add_umv(pred_mv, diff, self.mvmode);
73 self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv;
74 self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv;
75 self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv;
76 self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv;
79 0 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv; },
80 1 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv; },
81 2 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv; },
82 3 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv; },
89 fn set_zero_mv(&mut self, mb_x: usize) {
90 self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = ZERO_MV;
91 self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = ZERO_MV;
92 self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = ZERO_MV;
93 self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = ZERO_MV;
95 fn get_mv(&self, mb_x: usize, blk_no: usize) -> MV {
96 self.mv[self.mb_stride + mb_x * 2 + (blk_no & 1) + (blk_no >> 1) * self.mb_stride]
101 #[derive(Clone,Copy)]
112 fn new() -> Self { BMB {blk: [[0; 64]; 6], cbp: 0, fwd: false, mv_f: [ZERO_MV; 4], mv_b: [ZERO_MV; 4], num_mv: 0} }
115 #[derive(Clone,Copy)]
121 const ZERO_PRED_COEFFS: PredCoeffs = PredCoeffs { hor: [[1024, 0, 0, 0, 0, 0, 0, 0]; 6], ver: [[1024, 0, 0, 0, 0, 0, 0, 0]; 6] };
122 const ZERO_PRED_COEFFS2: PredCoeffs = PredCoeffs { hor: [[0x7FFF, 0, 0, 0, 0, 0, 0, 0]; 6], ver: [[0x7FFF, 0, 0, 0, 0, 0, 0, 0]; 6] };
124 pub const H263DEC_OPT_USES_GOB: u32 = 0x0001;
125 pub const H263DEC_OPT_SLICE_RESET: u32 = 0x0002;
126 pub const H263DEC_OPT_HAS_B_FRAMES: u32 = 0x0004;
127 pub const H263DEC_OPT_HAS_OBMC: u32 = 0x0008;
128 pub const H263DEC_OPT_PRED_QUANT: u32 = 0x0010;
130 pub struct H263BaseDecoder {
143 pred_coeffs: Vec<PredCoeffs>,
146 may_have_b_frames: bool,
148 mv_data: Vec<BlockMVInfo>,
150 obmc_buf: NAVideoBufferRef<u8>,
151 obmc_blk: Vec<(Type, BMB)>,
156 fn clip_dc(dc: i16) -> i16 {
158 else if dc > 2046 { 2047 }
163 fn clip_ac(ac: i16) -> i16 {
164 if ac < -2048 { -2048 }
165 else if ac > 2047 { 2047 }
170 impl H263BaseDecoder {
171 pub fn new_with_opts(options: u32) -> Self {
172 let is_gob = (options & H263DEC_OPT_USES_GOB) != 0;
173 let slice_reset = (options & H263DEC_OPT_SLICE_RESET) != 0;
174 let may_have_b_frames = (options & H263DEC_OPT_HAS_B_FRAMES) != 0;
175 let has_obmc = (options & H263DEC_OPT_HAS_OBMC) != 0;
176 let pred_quant = (options & H263DEC_OPT_PRED_QUANT) != 0;
178 let vbuf = alloc_video_buffer(NAVideoInfo::new(64, 64, false, YUV420_FORMAT), 4).unwrap();
179 let obmc_buf = vbuf.get_vbuf().unwrap();
182 w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0,
183 ftype: Type::Special,
184 ipbs: IPBShuffler::new(),
185 last_ts: 0, next_ts: 0, tsdiff: 0,
186 has_b: false, b_data: Vec::new(),
187 pred_coeffs: Vec::new(),
189 may_have_b_frames, has_obmc,
194 obmc_blk: Vec::new(),
197 pub fn new(is_gob: bool) -> Self {
198 Self::new_with_opts(H263DEC_OPT_SLICE_RESET | (if is_gob { H263DEC_OPT_USES_GOB } else { 0 }))
200 pub fn new_b_frames(is_gob: bool) -> Self {
201 Self::new_with_opts(H263DEC_OPT_SLICE_RESET | H263DEC_OPT_HAS_B_FRAMES | (if is_gob { H263DEC_OPT_USES_GOB } else { 0 }))
204 pub fn is_intra(&self) -> bool { self.ftype == Type::I }
205 pub fn get_frame_type(&self) -> FrameType {
207 Type::I => FrameType::I,
208 Type::P => FrameType::P,
209 Type::B => FrameType::B,
210 Type::PB => FrameType::P,
211 Type::Skip => FrameType::Skip,
212 Type::Special => FrameType::Skip,
215 pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) }
217 fn decode_intra_mb(&mut self, bd: &mut dyn BlockDecoder, bdsp: &dyn BlockDSP, mb_pos: usize, binfo: &BlockInfo, sstate: &SliceState, apply_acpred: bool) -> DecoderResult<()> {
219 bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (binfo.cbp & (1 << (5 - i))) != 0, &mut self.blk[i])?;
220 if apply_acpred && (binfo.acpred != ACPredMode::None) {
221 let has_b = (i == 1) || (i == 3) || !sstate.first_mb;
222 let has_a = (i == 2) || (i == 3) || !sstate.first_line;
223 let (b_mb, b_blk) = if has_b {
224 if (i == 1) || (i == 3) {
232 let (a_mb, a_blk) = if has_a {
233 if (i == 2) || (i == 3) {
236 (mb_pos - self.mb_w, i + 2)
238 (mb_pos - self.mb_w, i)
245 dc = (self.pred_coeffs[b_mb].hor[b_blk][0] + self.pred_coeffs[a_mb].ver[a_blk][0]) / 2;
247 dc = self.pred_coeffs[a_mb].ver[a_blk][0];
249 dc = self.pred_coeffs[b_mb].hor[b_blk][0];
253 self.blk[i][0] = clip_dc(self.blk[i][0] + dc);
258 self.blk[i][k * 8] += self.pred_coeffs[b_mb].hor[b_blk][k];
261 self.blk[i][k * 8] = clip_ac(self.blk[i][k * 8]);
264 self.blk[i][0] += 1024;
266 self.blk[i][0] = clip_dc(self.blk[i][0]);
271 self.blk[i][k] += self.pred_coeffs[a_mb].ver[a_blk][k];
274 self.blk[i][k] = clip_ac(self.blk[i][k]);
277 self.blk[i][0] += 1024;
279 self.blk[i][0] = clip_dc(self.blk[i][0]);
281 ACPredMode::None => {},
283 for t in 0..8 { self.pred_coeffs[mb_pos].hor[i][t] = self.blk[i][t * 8]; }
284 for t in 0..8 { self.pred_coeffs[mb_pos].ver[i][t] = self.blk[i][t]; }
286 bdsp.idct(&mut self.blk[i]);
290 fn decode_intra_mb_pred_quant(&mut self, bd: &mut dyn BlockDecoder, bdsp: &dyn BlockDSP, mb_pos: usize, binfo: &BlockInfo, sstate: &SliceState, apply_acpred: bool) -> DecoderResult<()> {
292 bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (binfo.cbp & (1 << (5 - i))) != 0, &mut self.blk[i])?;
293 let q = if binfo.get_q() < 8 {
296 i16::from(binfo.get_q() * 2)
298 let quant_gray = 1024 / q;
299 if apply_acpred && (binfo.acpred != ACPredMode::None) {
300 let has_b = (i == 1) || (i == 3) || !sstate.first_mb;
301 let has_a = (i == 2) || (i == 3) || !sstate.first_line;
302 let (b_mb, b_blk) = if has_b {
303 if (i == 1) || (i == 3) {
311 let (a_mb, a_blk) = if has_a {
312 if (i == 2) || (i == 3) {
315 (mb_pos - self.mb_w, i + 2)
317 (mb_pos - self.mb_w, i)
320 let dc_a = if has_a && self.pred_coeffs[a_mb].ver[a_blk][0] != 0x7FFF {
321 self.pred_coeffs[a_mb].ver[a_blk][0]
325 let dc_b = if has_b && self.pred_coeffs[b_mb].hor[b_blk][0] != 0x7FFF {
326 self.pred_coeffs[b_mb].hor[b_blk][0]
330 let dc = match binfo.acpred {
333 (dc_a + dc_b + 1) >> 1
345 self.blk[i][k * 8] += self.pred_coeffs[b_mb].hor[b_blk][k];
348 self.blk[i][k * 8] = clip_ac(self.blk[i][k * 8]);
358 self.blk[i][k] += self.pred_coeffs[a_mb].ver[a_blk][k];
361 self.blk[i][k] = clip_ac(self.blk[i][k]);
368 ACPredMode::None => { 0 },
370 self.blk[i][0] += dc;
371 for t in 0..8 { self.pred_coeffs[mb_pos].hor[i][t] = self.blk[i][t * 8]; }
372 for t in 0..8 { self.pred_coeffs[mb_pos].ver[i][t] = self.blk[i][t]; }
377 bdsp.idct(&mut self.blk[i]);
381 fn decode_inter_mb(&mut self, bd: &mut dyn BlockDecoder, bdsp: &dyn BlockDSP, binfo: &BlockInfo, sstate: &SliceState) -> DecoderResult<()> {
383 bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((binfo.cbp >> (5 - i)) & 1) != 0, &mut self.blk[i])?;
384 bdsp.idct(&mut self.blk[i]);
388 fn get_obmc_mv(&self, mb_idx: usize, blk_no: usize, cur_mv: MV) -> MV {
389 let (mbt, ref bi) = self.obmc_blk[mb_idx];
392 } else if mbt == Type::Skip {
394 } else if bi.num_mv == 1 {
400 #[allow(clippy::cyclomatic_complexity)]
401 fn reconstruct_obmc(&mut self, buf: &mut NAVideoBuffer<u8>, slice_start: usize, start: usize, end: usize, slice_end: bool) -> usize {
402 let mut mb_x = start % self.mb_w;
403 let mut mb_y = start / self.mb_w;
404 let mut mb_pos = start;
406 let has_top = mb_pos >= slice_start + self.mb_w;
407 let has_left = (mb_x > 0) && (mb_pos > slice_start);
408 let has_right = (mb_x + 1 < self.mb_w) && (mb_pos + 1 < end);
409 let has_bottom = mb_pos + self.mb_w < end;
411 if !has_bottom && !slice_end {
415 let (mbt, ref bi) = self.obmc_blk[mb_pos];
416 if mbt == Type::P || mbt == Type::Skip {
417 let single_mv = bi.num_mv != 4;
419 let cur_mv = if single_mv { bi.mv_f[0] } else { bi.mv_f[blk] };
420 let top_mv = if (blk & 2) == 0 {
422 self.get_obmc_mv(mb_pos - self.mb_w, blk + 2, cur_mv)
425 if single_mv { cur_mv } else { bi.mv_f[blk - 2] }
427 let left_mv = if (blk & 1) == 0 {
429 self.get_obmc_mv(mb_pos - 1, blk + 1, cur_mv)
432 if single_mv { cur_mv } else { bi.mv_f[blk - 1] }
434 let bottom_mv = if (blk & 2) != 0 {
436 self.get_obmc_mv(mb_pos + self.mb_w, blk - 2, cur_mv)
439 if single_mv { cur_mv } else { bi.mv_f[blk + 2] }
441 let right_mv = if (blk & 1) != 0 {
443 self.get_obmc_mv(mb_pos + 1, blk - 1, cur_mv)
446 if single_mv { cur_mv } else { bi.mv_f[blk + 1] }
449 let mut obmcbuf = NASimpleVideoFrame::from_video_buf(&mut self.obmc_buf).unwrap();
451 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
452 let dx = (mb_x * 16 + (blk & 1) * 8) as i16;
453 let dy = (mb_y * 16 + (blk & 2) * 4) as i16;
455 let block_params = [(8, 0, top_mv), (0, 8, left_mv), (8, 8, cur_mv), (16, 8, right_mv), (8, 16, bottom_mv)];
457 for (off_x, off_y, mv) in block_params.iter() {
458 let mx = dx + (mv.x >> 1) - off_x;
459 let my = dy + (mv.y >> 1) - off_y;
460 let mode = ((mv.x & 1) + (mv.y & 1) * 2) as usize;
461 blockdsp::copy_block(&mut obmcbuf, srcbuf.clone(), 0,
462 *off_x as usize, *off_y as usize, mx, my,
463 8, 8, 0, 1, mode, H263_INTERP_FUNCS);
465 let stride = buf.get_stride(0);
466 let off = buf.get_offset(0) + (dx as usize) + (dy as usize) * stride;
467 let data = buf.get_data_mut().unwrap();
468 obmc_filter(&mut data[off..], stride, obmcbuf.data, obmcbuf.stride[0]);
471 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
472 let mut dst = NASimpleVideoFrame::from_video_buf(buf).unwrap();
476 let (mvx, mvy, cmode) = if single_mv {
478 let cmode = (if (mv.x & 3) != 0 { 1 } else { 0 }) + (if (mv.y & 3) != 0 { 2 } else { 0 });
479 (mv.x >> 2, mv.y >> 2, cmode)
481 let sum_mv = bi.mv_f[0] + bi.mv_f[1] + bi.mv_f[2] + bi.mv_f[3];
482 let cmx = (sum_mv.x >> 3) + H263_CHROMA_ROUND[(sum_mv.x & 0xF) as usize];
483 let cmy = (sum_mv.y >> 3) + H263_CHROMA_ROUND[(sum_mv.y & 0xF) as usize];
484 let cmode = ((cmx & 1) + (cmy & 1) * 2) as usize;
487 blockdsp::copy_block(&mut dst, srcbuf.clone(), 1, xpos, ypos, mvx, mvy, 8, 8, 0, 1, cmode, H263_INTERP_FUNCS);
488 blockdsp::copy_block(&mut dst, srcbuf.clone(), 2, xpos, ypos, mvx, mvy, 8, 8, 0, 1, cmode, H263_INTERP_FUNCS);
490 if mbt != Type::Skip {
491 blockdsp::add_blocks(buf, mb_x, mb_y, &bi.blk);
497 if mb_x == self.mb_w {
504 #[allow(clippy::cyclomatic_complexity)]
505 pub fn parse_frame(&mut self, bd: &mut dyn BlockDecoder, bdsp: &dyn BlockDSP) -> DecoderResult<NABufferType> {
506 let pinfo = bd.decode_pichdr()?;
507 let mut mvi = MVInfo::new();
508 let mut mvi2 = MVInfo::new();
509 let mut cbpi = CBPInfo::new();
511 //todo handle res change
514 self.mb_w = (pinfo.w + 15) >> 4;
515 self.mb_h = (pinfo.h + 15) >> 4;
516 self.num_mb = self.mb_w * self.mb_h;
517 self.ftype = pinfo.mode;
518 self.has_b = pinfo.is_pb();
520 let do_obmc = self.has_obmc && (pinfo.mode == Type::P);
523 let capacity = self.obmc_blk.capacity();
524 if capacity < self.num_mb {
525 self.obmc_blk.reserve(self.num_mb - capacity);
527 self.obmc_blk.truncate(0);
531 self.mv_data.truncate(0);
534 let save_b_data = pinfo.mode.is_ref() && self.may_have_b_frames;
536 self.mv_data.truncate(0);
538 let is_b = pinfo.mode == Type::B;
540 if is_b && (self.mv_data.len() < self.mb_w * self.mb_h) {
541 return Err(DecoderError::MissingReference);
544 let tsdiff = if pinfo.is_pb() { pinfo.ts.wrapping_sub(self.last_ts) >> 1 }
545 else { self.last_ts.wrapping_sub(self.next_ts) >> 1 };
546 let bsdiff = if pinfo.is_pb() { (pinfo.get_pbinfo().get_trb() as u16) << 7 }
547 else { pinfo.ts.wrapping_sub(self.next_ts) >> 1 };
549 let fmt = formats::YUV420_FORMAT;
550 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
551 let bufinfo = alloc_video_buffer(vinfo, 4)?;
552 let mut buf = bufinfo.get_vbuf().unwrap();
554 let mut slice = if self.is_gob {
555 SliceInfo::get_default_slice(&pinfo)
557 bd.decode_slice_header(&pinfo)?
559 mvi.reset(self.mb_w, 0, pinfo.get_mvmode());
560 if is_b || pinfo.is_pb() {
561 mvi2.reset(self.mb_w, 0, pinfo.get_mvmode());
563 cbpi.reset(self.mb_w);
565 let mut sstate = SliceState::new(pinfo.mode == Type::I);
567 let apply_acpred = /*(pinfo.mode == Type::I) && */pinfo.plusinfo.is_some() && pinfo.plusinfo.unwrap().aic;
569 self.pred_coeffs.truncate(0);
570 if !self.pred_quant {
571 self.pred_coeffs.resize(self.mb_w * self.mb_h, ZERO_PRED_COEFFS);
573 self.pred_coeffs.resize(self.mb_w * self.mb_h, ZERO_PRED_COEFFS2);
576 sstate.quant = slice.quant;
577 let mut obmc_start = 0;
578 let mut slice_start = 0;
579 for mb_y in 0..self.mb_h {
580 for mb_x in 0..self.mb_w {
581 self.blk = [[0; 64]; 6];
583 if slice.is_at_end(mb_pos) || (slice.needs_check() && mb_pos > 0 && bd.is_slice_end()) {
585 self.reconstruct_obmc(&mut buf, slice_start, obmc_start, mb_pos, true);
587 slice_start = mb_pos;
589 slice = bd.decode_slice_header(&pinfo)?;
590 if self.is_gob || self.slice_reset {
591 mvi.reset(self.mb_w, mb_x, pinfo.get_mvmode());
592 if is_b || pinfo.is_pb() {
593 mvi2.reset(self.mb_w, mb_x, pinfo.get_mvmode());
595 cbpi.reset(self.mb_w);
596 sstate.reset_slice(mb_x, mb_y);
597 sstate.quant = slice.quant;
601 let binfo = bd.decode_block_header(&pinfo, &slice, &sstate)?;
602 let cbp = binfo.get_cbp();
603 cbpi.set_cbp(mb_x, cbp);
604 cbpi.set_q(mb_x, binfo.get_q());
605 sstate.quant = binfo.get_q();
606 if binfo.is_intra() {
608 self.mv_data.push(BlockMVInfo::Intra);
610 if !self.pred_quant {
611 self.decode_intra_mb(bd, bdsp, mb_pos, &binfo, &sstate, apply_acpred)?;
613 self.decode_intra_mb_pred_quant(bd, bdsp, mb_pos, &binfo, &sstate, apply_acpred)?;
615 blockdsp::put_blocks(&mut buf, mb_x, mb_y, &self.blk);
616 mvi.set_zero_mv(mb_x);
618 mvi2.set_zero_mv(mb_x);
619 } else if pinfo.is_pb() {
620 mvi.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
621 mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
624 //todo: use MV from PB-part if available
625 self.obmc_blk.push((Type::I, BMB::new()));
627 } else if (binfo.mode != Type::B) && !binfo.is_skipped() {
628 if binfo.get_num_mvs() == 1 {
629 let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
631 self.mv_data.push(BlockMVInfo::Inter_1MV(mv));
633 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
634 bdsp.copy_blocks(&mut buf, srcbuf.clone(), mb_x * 16, mb_y * 16, mv);
637 mvi2.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
640 let mut blki = BMB::new();
643 self.obmc_blk.push((Type::P, blki));
646 let mut mv: [MV; 4] = [ZERO_MV, ZERO_MV, ZERO_MV, ZERO_MV];
648 mv[blk_no] = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
650 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
651 bdsp.copy_blocks8x8(&mut buf, srcbuf.clone(), mb_x * 16, mb_y * 16, &mv);
655 mvi2.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
659 self.mv_data.push(BlockMVInfo::Inter_4MV(mv));
662 let mut blki = BMB::new();
665 self.obmc_blk.push((Type::P, blki));
668 self.decode_inter_mb(bd, bdsp, &binfo, &sstate)?;
670 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &self.blk);
672 let (_, ref mut bi) = self.obmc_blk[mb_pos];
675 if is_b && !pinfo.is_pb() {
676 mvi2.set_zero_mv(mb_x);
678 } else if binfo.mode != Type::B {
679 self.mv_data.push(BlockMVInfo::Inter_1MV(ZERO_MV));
680 mvi.set_zero_mv(mb_x);
681 if is_b || pinfo.is_pb() {
682 mvi2.set_zero_mv(mb_x);
685 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
686 bdsp.copy_blocks(&mut buf, srcbuf.clone(), mb_x * 16, mb_y * 16, ZERO_MV);
689 self.obmc_blk.push((Type::Skip, BMB::new()));
692 recon_b_mb(&mut buf, &mut self.ipbs, bdsp, &mut mvi, &mut mvi2, mb_pos, self.mb_w, &sstate, &binfo, &self.mv_data, bsdiff, tsdiff);
694 self.decode_inter_mb(bd, bdsp, &binfo, &sstate)?;
695 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &self.blk);
699 let mut b_mb = BMB::new();
700 let cbp = binfo.get_cbp_b();
701 let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2;
703 if bq < 1 { bquant = 1; }
704 else if bq > 31 { bquant = 31; }
705 else { bquant = bq as u8; }
709 bd.decode_block_inter(&binfo, &sstate, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?;
710 bdsp.idct(&mut b_mb.blk[i]);
713 let is_fwd = binfo.is_b_fwd();
715 if binfo.get_num_mvs() != 4 {
716 let ref_mv = mvi2.get_mv(mb_x, 0);
717 let b_mv = if binfo.is_intra() { binfo.get_mv2(1) } else { binfo.get_mv2(0) };
718 let src_mv = if is_fwd { ZERO_MV } else { ref_mv.scale(bsdiff, tsdiff) };
719 let mv_f = MV::add_umv(src_mv, b_mv, pinfo.get_mvmode());
720 let mv_b = MV::b_sub(ref_mv, mv_f, b_mv, bsdiff, tsdiff);
726 let src_mv = if is_fwd { ZERO_MV } else { mvi2.get_mv(mb_x, blk_no).scale(bsdiff, tsdiff) };
727 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
728 let mv_b = MV::b_sub(mvi2.get_mv(mb_x, blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
729 b_mb.mv_f[blk_no] = mv_f;
730 b_mb.mv_b[blk_no] = mv_b;
734 self.b_data.push(b_mb);
739 if do_obmc && (mb_pos > obmc_start + self.mb_w) {
740 obmc_start = self.reconstruct_obmc(&mut buf, slice_start, obmc_start, mb_pos - self.mb_w, false);
741 } else if let Some(plusinfo) = pinfo.plusinfo {
742 if plusinfo.deblock {
743 bdsp.filter_row(&mut buf, mb_y, self.mb_w, &cbpi);
747 if is_b || pinfo.is_pb() {
754 self.reconstruct_obmc(&mut buf, slice_start, obmc_start, mb_pos, true);
757 if pinfo.mode.is_ref() {
758 self.ipbs.add_frame(buf);
759 self.next_ts = self.last_ts;
760 self.last_ts = pinfo.ts;
761 self.tsdiff = tsdiff;
766 pub fn flush(&mut self) {
770 pub fn get_bframe(&mut self, bdsp: &dyn BlockDSP) -> DecoderResult<NABufferType> {
771 if !self.has_b || self.ipbs.get_lastref().is_none() || self.ipbs.get_nextref().is_none() {
772 return Err(DecoderError::MissingReference);
776 let fmt = formats::YUV420_FORMAT;
777 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
778 let bufinfo = alloc_video_buffer(vinfo, 4)?;
779 let b_buf = bufinfo.get_vbuf().unwrap();
781 if let (Some(ref bck_buf), Some(ref fwd_buf)) = (self.ipbs.get_b_bwdref(), self.ipbs.get_b_fwdref()) {
782 recon_b_frame(b_buf, bck_buf.clone(), fwd_buf.clone(), self.mb_w, self.mb_h, self.b_data.as_slice(), bdsp);
785 self.b_data.truncate(0);
790 fn recon_b_mb(buf: &mut NAVideoBuffer<u8>, ipbs: &mut IPBShuffler, bdsp: &dyn BlockDSP, mvi: &mut MVInfo, mvi2: &mut MVInfo, mb_pos: usize, mb_w: usize, sstate: &SliceState, binfo: &BlockInfo, mv_data: &[BlockMVInfo], bsdiff: u16, tsdiff: u16) {
791 let mb_x = mb_pos % mb_w;
792 let mb_y = mb_pos / mb_w;
794 let ref_mv_info = mv_data[mb_pos];
795 let has_fwd = binfo.get_num_mvs() > 0;
796 let has_bwd = binfo.get_num_mvs2() > 0;
798 if has_fwd || has_bwd {
801 fwd_mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
804 mvi.set_zero_mv(mb_x);
808 bwd_mv = mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
811 mvi2.set_zero_mv(mb_x);
813 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (ipbs.get_nextref(), ipbs.get_lastref()) {
814 if has_fwd && has_bwd {
815 bdsp.copy_blocks(buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, fwd_mv);
816 bdsp.avg_blocks (buf, bck_buf.clone(), mb_x * 16, mb_y * 16, bwd_mv);
818 bdsp.copy_blocks(buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, fwd_mv);
820 bdsp.copy_blocks(buf, bck_buf.clone(), mb_x * 16, mb_y * 16, bwd_mv);
824 if let BlockMVInfo::Inter_4MV(mvs) = ref_mv_info {
825 let mut mv_f = [ZERO_MV; 4];
826 let mut mv_b = [ZERO_MV; 4];
828 let ref_mv = mvs[blk_no];
829 let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
830 let ref_mv_bwd = ref_mv - ref_mv_fwd;
831 mv_f[blk_no] = ref_mv_fwd;
832 mv_b[blk_no] = ref_mv_bwd;
834 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (ipbs.get_nextref(), ipbs.get_lastref()) {
835 bdsp.copy_blocks8x8(buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, &mv_f);
836 bdsp.avg_blocks8x8 (buf, bck_buf.clone(), mb_x * 16, mb_y * 16, &mv_b);
839 let ref_mv = if let BlockMVInfo::Inter_1MV(mv_) = ref_mv_info { mv_ } else { ZERO_MV };
840 let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
841 let ref_mv_bwd = MV::b_sub(ref_mv, ref_mv_fwd, ZERO_MV, bsdiff, tsdiff);
843 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (ipbs.get_nextref(), ipbs.get_lastref()) {
844 bdsp.copy_blocks(buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, ref_mv_fwd);
845 bdsp.avg_blocks (buf, bck_buf.clone(), mb_x * 16, mb_y * 16, ref_mv_bwd);
848 mvi.set_zero_mv(mb_x);
849 mvi2.set_zero_mv(mb_x);
853 fn recon_b_frame(mut b_buf: NAVideoBufferRef<u8>, bck_buf: NAVideoBufferRef<u8>, fwd_buf: NAVideoBufferRef<u8>,
854 mb_w: usize, mb_h: usize, b_data: &[BMB], bdsp: &dyn BlockDSP) {
855 let mut cbpi = CBPInfo::new();
858 for mb_y in 0..mb_h {
859 for mb_x in 0..mb_w {
860 let num_mv = b_data[cur_mb].num_mv;
861 let is_fwd = b_data[cur_mb].fwd;
862 let cbp = b_data[cur_mb].cbp;
863 cbpi.set_cbp(mb_x, cbp);
865 bdsp.copy_blocks(&mut b_buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, b_data[cur_mb].mv_f[0]);
867 bdsp.avg_blocks(&mut b_buf, bck_buf.clone(), mb_x * 16, mb_y * 16, b_data[cur_mb].mv_b[0]);
870 bdsp.copy_blocks8x8(&mut b_buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, &b_data[cur_mb].mv_f);
872 bdsp.avg_blocks8x8(&mut b_buf, bck_buf.clone(), mb_x * 16, mb_y * 16, &b_data[cur_mb].mv_b);
876 blockdsp::add_blocks(&mut b_buf, mb_x, mb_y, &b_data[cur_mb].blk);