4 use super::super::blockdsp;
20 fn new() -> Self { MVInfo{ mv: Vec::new(), mb_w: 0, mb_stride: 0, mb_start: 0, top: true, mvmode: MVMode::Old } }
21 fn reset(&mut self, mb_w: usize, mb_start: usize, mvmode: MVMode) {
22 self.mb_start = mb_start;
24 self.mb_stride = mb_w * 2;
25 self.mv.resize(self.mb_stride * 3, ZERO_MV);
28 fn update_row(&mut self) {
29 self.mb_start = self.mb_w + 1;
31 for i in 0..self.mb_stride {
32 self.mv[i] = self.mv[self.mb_stride * 2 + i];
35 #[allow(non_snake_case)]
36 fn predict(&mut self, mb_x: usize, blk_no: usize, use4: bool, diff: MV, first_line: bool, first_mb: bool) -> MV {
40 let last = mb_x == self.mb_w - 1;
43 if mb_x != self.mb_start {
44 A = if !first_mb { self.mv[self.mb_stride + mb_x * 2 - 1] } else { ZERO_MV };
45 B = if !first_line { self.mv[ mb_x * 2] } else { A };
46 C = if !first_line && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV };
48 A = ZERO_MV; B = ZERO_MV; C = ZERO_MV;
52 A = self.mv[self.mb_stride + mb_x * 2];
53 B = if !first_line { self.mv[mb_x * 2 + 1] } else { A };
54 C = if !first_line && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV/*A*/ };
57 A = if mb_x != self.mb_start { self.mv[self.mb_stride * 2 + mb_x * 2 - 1] } else { ZERO_MV };
58 B = self.mv[self.mb_stride + mb_x * 2];
59 C = self.mv[self.mb_stride + mb_x * 2 + 1];
62 A = self.mv[self.mb_stride * 2 + mb_x * 2];
63 B = self.mv[self.mb_stride * 1 + mb_x * 2 + 1];
64 C = self.mv[self.mb_stride * 1 + mb_x * 2];
66 _ => { return ZERO_MV; }
68 let pred_mv = MV::pred(A, B, C);
69 let new_mv = MV::add_umv(pred_mv, diff, self.mvmode);
71 self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv;
72 self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv;
73 self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv;
74 self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv;
77 0 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv; },
78 1 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv; },
79 2 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv; },
80 3 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv; },
87 fn set_zero_mv(&mut self, mb_x: usize) {
88 self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = ZERO_MV;
89 self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = ZERO_MV;
90 self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = ZERO_MV;
91 self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = ZERO_MV;
93 fn get_mv(&self, mb_x: usize, blk_no: usize) -> MV {
94 self.mv[self.mb_stride + mb_x * 2 + (blk_no & 1) + (blk_no >> 1) * self.mb_stride]
110 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} }
113 #[derive(Clone,Copy)]
119 const ZERO_PRED_COEFFS: PredCoeffs = PredCoeffs { hor: [[0; 8]; 6], ver: [[0; 8]; 6] };
121 pub struct H263BaseDecoder {
134 pred_coeffs: Vec<PredCoeffs>,
137 may_have_b_frames: bool,
138 mv_data: Vec<BlockMVInfo>,
142 fn clip_dc(dc: i16) -> i16 {
144 else if dc > 2046 { 2046 }
145 else { (dc + 1) & !1 }
149 fn clip_ac(ac: i16) -> i16 {
150 if ac < -2048 { -2048 }
151 else if ac > 2047 { 2047 }
156 impl H263BaseDecoder {
157 pub fn new_with_opts(is_gob: bool, slice_reset: bool, may_have_b_frames: bool) -> Self {
159 w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0,
160 ftype: Type::Special,
161 ipbs: IPBShuffler::new(),
162 last_ts: 0, next_ts: 0, tsdiff: 0,
163 has_b: false, b_data: Vec::new(),
164 pred_coeffs: Vec::new(),
170 pub fn new(is_gob: bool) -> Self {
171 Self::new_with_opts(is_gob, true, false)
173 pub fn new_b_frames(is_gob: bool) -> Self {
174 Self::new_with_opts(is_gob, true, true)
177 pub fn is_intra(&self) -> bool { self.ftype == Type::I }
178 pub fn get_frame_type(&self) -> FrameType {
180 Type::I => FrameType::I,
181 Type::P => FrameType::P,
182 Type::B => FrameType::B,
183 Type::PB => FrameType::P,
184 Type::Skip => FrameType::Skip,
185 Type::Special => FrameType::Skip,
188 pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) }
190 pub fn parse_frame(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
191 let pinfo = bd.decode_pichdr()?;
192 let mut mvi = MVInfo::new();
193 let mut mvi2 = MVInfo::new();
194 let mut cbpi = CBPInfo::new();
196 //todo handle res change
199 self.mb_w = (pinfo.w + 15) >> 4;
200 self.mb_h = (pinfo.h + 15) >> 4;
201 self.num_mb = self.mb_w * self.mb_h;
202 self.ftype = pinfo.mode;
203 self.has_b = pinfo.is_pb();
206 self.mv_data.truncate(0);
209 let save_b_data = pinfo.mode.is_ref() && self.may_have_b_frames;
211 self.mv_data.truncate(0);
213 let is_b = pinfo.mode == Type::B;
215 let tsdiff = if pinfo.is_pb() { pinfo.ts.wrapping_sub(self.last_ts) >> 1 }
216 else { self.last_ts.wrapping_sub(self.next_ts) >> 1 };
217 let bsdiff = if pinfo.is_pb() { (pinfo.get_pbinfo().get_trb() as u16) << 7 }
218 else { pinfo.ts.wrapping_sub(self.next_ts) >> 1 };
220 let fmt = formats::YUV420_FORMAT;
221 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
222 let bufinfo = alloc_video_buffer(vinfo, 4)?;
223 let mut buf = bufinfo.get_vbuf().unwrap();
225 let mut slice = if self.is_gob {
226 SliceInfo::get_default_slice(&pinfo)
228 bd.decode_slice_header(&pinfo)?
230 mvi.reset(self.mb_w, 0, pinfo.get_mvmode());
231 if is_b || pinfo.is_pb() {
232 mvi2.reset(self.mb_w, 0, pinfo.get_mvmode());
234 cbpi.reset(self.mb_w);
236 let mut blk: [[i16; 64]; 6] = [[0; 64]; 6];
237 let mut sstate = SliceState::new(pinfo.mode == Type::I);
239 let apply_acpred = (pinfo.mode == Type::I) && pinfo.plusinfo.is_some() && pinfo.plusinfo.unwrap().aic;
241 self.pred_coeffs.truncate(0);
242 self.pred_coeffs.resize(self.mb_w * self.mb_h, ZERO_PRED_COEFFS);
244 sstate.quant = slice.quant;
245 for mb_y in 0..self.mb_h {
246 for mb_x in 0..self.mb_w {
247 for i in 0..6 { for j in 0..64 { blk[i][j] = 0; } }
249 if slice.is_at_end(mb_pos) || (slice.needs_check() && mb_pos > 0 && bd.is_slice_end()) {
250 slice = bd.decode_slice_header(&pinfo)?;
251 if !self.is_gob && self.slice_reset {
252 mvi.reset(self.mb_w, mb_x, pinfo.get_mvmode());
253 if is_b || pinfo.is_pb() {
254 mvi2.reset(self.mb_w, mb_x, pinfo.get_mvmode());
256 cbpi.reset(self.mb_w);
257 sstate.reset_slice(mb_x, mb_y);
258 sstate.quant = slice.quant;
262 let binfo = bd.decode_block_header(&pinfo, &slice, &sstate)?;
263 let cbp = binfo.get_cbp();
264 cbpi.set_cbp(mb_x, cbp);
265 cbpi.set_q(mb_x, binfo.get_q());
266 sstate.quant = binfo.get_q();
267 if binfo.is_intra() {
269 self.mv_data.push(BlockMVInfo::Intra);
272 bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (cbp & (1 << (5 - i))) != 0, &mut blk[i])?;
273 if apply_acpred && (binfo.acpred != ACPredMode::None) {
274 let has_b = (i == 1) || (i == 3) || !sstate.first_mb;
275 let has_a = (i == 2) || (i == 3) || !sstate.first_line;
276 let (b_mb, b_blk) = if has_b {
277 if (i == 1) || (i == 3) {
285 let (a_mb, a_blk) = if has_a {
286 if (i == 2) || (i == 3) {
289 (mb_pos - self.mb_w, i + 2)
291 (mb_pos - self.mb_w, i)
298 dc = (self.pred_coeffs[b_mb].hor[b_blk][0] + self.pred_coeffs[a_mb].ver[a_blk][0]) / 2;
300 dc = self.pred_coeffs[a_mb].ver[a_blk][0];
302 dc = self.pred_coeffs[b_mb].hor[b_blk][0];
306 blk[i][0] = clip_dc(blk[i][0] + dc);
311 blk[i][k * 8] += self.pred_coeffs[b_mb].hor[b_blk][k];
314 blk[i][k * 8] = clip_ac(blk[i][k * 8]);
319 blk[i][0] = clip_dc(blk[i][0]);
324 blk[i][k] += self.pred_coeffs[a_mb].ver[a_blk][k];
327 blk[i][k] = clip_ac(blk[i][k]);
332 blk[i][0] = clip_dc(blk[i][0]);
334 ACPredMode::None => {},
336 for t in 0..8 { self.pred_coeffs[mb_pos].hor[i][t] = blk[i][t * 8]; }
337 for t in 0..8 { self.pred_coeffs[mb_pos].ver[i][t] = blk[i][t]; }
339 bdsp.idct(&mut blk[i]);
341 blockdsp::put_blocks(&mut buf, mb_x, mb_y, &blk);
342 mvi.set_zero_mv(mb_x);
344 mvi2.set_zero_mv(mb_x);
345 } else if pinfo.is_pb() {
346 mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
348 } else if (binfo.mode != Type::B) && !binfo.is_skipped() {
349 if binfo.get_num_mvs() == 1 {
350 let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
352 self.mv_data.push(BlockMVInfo::Inter_1MV(mv));
354 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
355 bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, mv);
358 mvi2.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
361 let mut mv: [MV; 4] = [ZERO_MV, ZERO_MV, ZERO_MV, ZERO_MV];
363 mv[blk_no] = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
364 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
365 bdsp.copy_blocks(&mut buf, srcbuf,
366 mb_x * 16 + (blk_no & 1) * 8,
367 mb_y * 16 + (blk_no & 2) * 4, 8, 8, mv[blk_no]);
372 mvi2.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
376 self.mv_data.push(BlockMVInfo::Inter_4MV(mv));
380 bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
381 bdsp.idct(&mut blk[i]);
383 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
384 if is_b && !pinfo.is_pb() {
385 mvi2.set_zero_mv(mb_x);
387 } else if binfo.mode != Type::B {
388 self.mv_data.push(BlockMVInfo::Inter_1MV(ZERO_MV));
389 mvi.set_zero_mv(mb_x);
390 if is_b || pinfo.is_pb() {
391 mvi2.set_zero_mv(mb_x);
393 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
394 bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV);
397 let ref_mv_info = self.mv_data[mb_pos];
398 let has_fwd = binfo.get_num_mvs() > 0;
399 let has_bwd = binfo.get_num_mvs2() > 0;
401 if has_fwd || has_bwd {
404 fwd_mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
407 mvi.set_zero_mv(mb_x);
411 bwd_mv = mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
414 mvi2.set_zero_mv(mb_x);
416 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
417 if has_fwd && has_bwd {
418 bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, fwd_mv);
419 bdsp.avg_blocks (&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, bwd_mv);
421 bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, fwd_mv);
423 bdsp.copy_blocks(&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, bwd_mv);
427 if let BlockMVInfo::Inter_4MV(mvs) = ref_mv_info {
429 let ref_mv = mvs[blk_no];
430 let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
431 let ref_mv_bwd = ref_mv - ref_mv_fwd;
432 let xoff = mb_x * 16 + (blk_no & 1) * 8;
433 let yoff = mb_y * 16 + (blk_no & 2) * 4;
434 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
435 bdsp.copy_blocks(&mut buf, fwd_buf, xoff, yoff, 8, 8, ref_mv_fwd);
436 bdsp.avg_blocks (&mut buf, bck_buf, xoff, yoff, 8, 8, ref_mv_bwd);
440 let ref_mv = if let BlockMVInfo::Inter_1MV(mv_) = ref_mv_info { mv_ } else { ZERO_MV };
441 let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
442 let ref_mv_bwd = MV::b_sub(ref_mv, ref_mv_fwd, ZERO_MV, bsdiff, tsdiff);
444 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
445 bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, ref_mv_fwd);
446 bdsp.avg_blocks (&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, ref_mv_bwd);
449 mvi.set_zero_mv(mb_x);
450 mvi2.set_zero_mv(mb_x);
454 bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
455 bdsp.idct(&mut blk[i]);
457 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
461 let mut b_mb = BMB::new();
462 let cbp = binfo.get_cbp_b();
463 let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2;
465 if bq < 1 { bquant = 1; }
466 else if bq > 31 { bquant = 31; }
467 else { bquant = bq as u8; }
471 bd.decode_block_inter(&binfo, &sstate, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?;
472 bdsp.idct(&mut b_mb.blk[i]);
475 let is_fwd = binfo.is_b_fwd();
477 if binfo.get_num_mvs() != 4 {
478 let ref_mv = mvi2.get_mv(mb_x, 0);
479 let b_mv = if binfo.is_intra() { binfo.get_mv2(1) } else { binfo.get_mv2(0) };
480 let src_mv = if is_fwd { ZERO_MV } else { ref_mv.scale(bsdiff, tsdiff) };
481 let mv_f = MV::add_umv(src_mv, b_mv, pinfo.get_mvmode());
482 let mv_b = MV::b_sub(ref_mv, mv_f, b_mv, bsdiff, tsdiff);
488 let src_mv = if is_fwd { ZERO_MV } else { mvi2.get_mv(mb_x, blk_no).scale(bsdiff, tsdiff) };
489 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
490 let mv_b = MV::b_sub(mvi2.get_mv(mb_x, blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
491 b_mb.mv_f[blk_no] = mv_f;
492 b_mb.mv_b[blk_no] = mv_b;
496 self.b_data.push(b_mb);
501 if let Some(plusinfo) = pinfo.plusinfo {
502 if plusinfo.deblock {
503 bdsp.filter_row(&mut buf, mb_y, self.mb_w, &cbpi);
507 if is_b || pinfo.is_pb() {
514 if pinfo.mode.is_ref() {
515 self.ipbs.add_frame(buf);
516 self.next_ts = self.last_ts;
517 self.last_ts = pinfo.ts;
518 self.tsdiff = tsdiff;
524 pub fn get_bframe(&mut self, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
525 if !self.has_b || self.ipbs.get_lastref().is_none() || self.ipbs.get_nextref().is_none() {
526 return Err(DecoderError::MissingReference);
530 let fmt = formats::YUV420_FORMAT;
531 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
532 let bufinfo = alloc_video_buffer(vinfo, 4)?;
533 let mut b_buf = bufinfo.get_vbuf().unwrap();
535 if let (Some(ref bck_buf), Some(ref fwd_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
536 recon_b_frame(&mut b_buf, fwd_buf, bck_buf, self.mb_w, self.mb_h, self.b_data.as_slice(), bdsp);
539 self.b_data.truncate(0);
544 fn recon_b_frame(b_buf: &mut NAVideoBuffer<u8>, bck_buf: &NAVideoBuffer<u8>, fwd_buf: &NAVideoBuffer<u8>,
545 mb_w: usize, mb_h: usize, b_data: &[BMB], bdsp: &BlockDSP) {
546 let mut cbpi = CBPInfo::new();
549 for mb_y in 0..mb_h {
550 for mb_x in 0..mb_w {
551 let num_mv = b_data[cur_mb].num_mv;
552 let is_fwd = b_data[cur_mb].fwd;
553 let cbp = b_data[cur_mb].cbp;
554 cbpi.set_cbp(mb_x, cbp);
556 bdsp.copy_blocks(b_buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_b[0]);
558 bdsp.avg_blocks(b_buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_f[0]);
562 let xpos = mb_x * 16 + (blk_no & 1) * 8;
563 let ypos = mb_y * 16 + (blk_no & 2) * 4;
564 bdsp.copy_blocks(b_buf, fwd_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_b[blk_no]);
566 bdsp.avg_blocks(b_buf, bck_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_f[blk_no]);
571 blockdsp::add_blocks(b_buf, mb_x, mb_y, &b_data[cur_mb].blk);