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 { 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;
107 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} }
110 #[derive(Clone,Copy)]
116 const ZERO_PRED_COEFFS: PredCoeffs = PredCoeffs { hor: [[0; 8]; 6], ver: [[0; 8]; 6] };
118 pub struct H263BaseDecoder {
131 pred_coeffs: Vec<PredCoeffs>,
133 may_have_b_frames: bool,
134 mv_data: Vec<BlockMVInfo>,
138 fn clip_dc(dc: i16) -> i16 {
140 else if dc > 2046 { 2046 }
141 else { (dc + 1) & !1 }
145 fn clip_ac(ac: i16) -> i16 {
146 if ac < -2048 { -2048 }
147 else if ac > 2047 { 2047 }
152 impl H263BaseDecoder {
153 pub fn new_with_opts(is_gob: bool, may_have_b_frames: bool) -> Self {
155 w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0,
156 ftype: Type::Special,
157 ipbs: IPBShuffler::new(),
158 last_ts: 0, next_ts: 0, tsdiff: 0,
159 has_b: false, b_data: Vec::new(),
160 pred_coeffs: Vec::new(),
162 may_have_b_frames: may_have_b_frames,
166 pub fn new(is_gob: bool) -> Self {
167 Self::new_with_opts(is_gob, false)
169 pub fn new_b_frames(is_gob: bool) -> Self {
170 Self::new_with_opts(is_gob, true)
173 pub fn is_intra(&self) -> bool { self.ftype == Type::I }
174 pub fn get_frame_type(&self) -> FrameType {
176 Type::I => FrameType::I,
177 Type::P => FrameType::P,
178 Type::B => FrameType::B,
179 Type::PB => FrameType::P,
180 Type::Skip => FrameType::Skip,
181 Type::Special => FrameType::Skip,
184 pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) }
186 pub fn parse_frame(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
187 let pinfo = bd.decode_pichdr()?;
188 let mut mvi = MVInfo::new();
189 let mut mvi2 = MVInfo::new();
190 let mut cbpi = CBPInfo::new();
192 //todo handle res change
195 self.mb_w = (pinfo.w + 15) >> 4;
196 self.mb_h = (pinfo.h + 15) >> 4;
197 self.num_mb = self.mb_w * self.mb_h;
198 self.ftype = pinfo.mode;
199 self.has_b = pinfo.is_pb();
202 self.mv_data.truncate(0);
205 let save_b_data = pinfo.mode.is_ref() && self.may_have_b_frames;
207 self.mv_data.truncate(0);
209 let is_b = pinfo.mode == Type::B;
211 let tsdiff = pinfo.ts.wrapping_sub(self.last_ts) >> 1;
212 let bsdiff = if pinfo.is_pb() { (pinfo.get_pbinfo().get_trb() as u16) << 7 }
213 else { pinfo.ts.wrapping_sub(self.next_ts) >> 1 };
215 let fmt = formats::YUV420_FORMAT;
216 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
217 let bufret = alloc_video_buffer(vinfo, 4);
218 if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
219 let mut bufinfo = bufret.unwrap();
220 let mut buf = bufinfo.get_vbuf().unwrap();
222 let mut slice = if self.is_gob {
223 SliceInfo::get_default_slice(&pinfo)
225 bd.decode_slice_header(&pinfo)?
227 mvi.reset(self.mb_w, 0, pinfo.get_mvmode());
229 mvi2.reset(self.mb_w, 0, pinfo.get_mvmode());
231 cbpi.reset(self.mb_w);
233 let mut blk: [[i16; 64]; 6] = [[0; 64]; 6];
234 let mut sstate = SliceState::new(pinfo.mode == Type::I);
236 let apply_acpred = (pinfo.mode == Type::I) && pinfo.plusinfo.is_some() && pinfo.plusinfo.unwrap().aic;
238 self.pred_coeffs.truncate(0);
239 self.pred_coeffs.resize(self.mb_w * self.mb_h, ZERO_PRED_COEFFS);
241 for mb_y in 0..self.mb_h {
242 for mb_x in 0..self.mb_w {
243 for i in 0..6 { for j in 0..64 { blk[i][j] = 0; } }
245 if slice.is_at_end(mb_pos) || (slice.needs_check() && mb_pos > 0 && bd.is_slice_end()) {
246 slice = bd.decode_slice_header(&pinfo)?;
248 mvi.reset(self.mb_w, mb_x, pinfo.get_mvmode());
250 mvi2.reset(self.mb_w, mb_x, pinfo.get_mvmode());
252 cbpi.reset(self.mb_w);
253 sstate.reset_slice(mb_x, mb_y);
257 let binfo = bd.decode_block_header(&pinfo, &slice, &sstate)?;
258 let cbp = binfo.get_cbp();
259 cbpi.set_cbp(mb_x, cbp);
260 cbpi.set_q(mb_x, binfo.get_q());
261 if binfo.is_intra() {
263 self.mv_data.push(BlockMVInfo::Intra);
266 bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (cbp & (1 << (5 - i))) != 0, &mut blk[i])?;
267 if apply_acpred && (binfo.acpred != ACPredMode::None) {
268 let has_b = (i == 1) || (i == 3) || !sstate.first_mb;
269 let has_a = (i == 2) || (i == 3) || !sstate.first_line;
270 let (b_mb, b_blk) = if has_b {
271 if (i == 1) || (i == 3) {
279 let (a_mb, a_blk) = if has_a {
280 if (i == 2) || (i == 3) {
283 (mb_pos - self.mb_w, i + 2)
285 (mb_pos - self.mb_w, i)
292 dc = (self.pred_coeffs[b_mb].hor[b_blk][0] + self.pred_coeffs[a_mb].ver[a_blk][0]) / 2;
294 dc = self.pred_coeffs[a_mb].ver[a_blk][0];
296 dc = self.pred_coeffs[b_mb].hor[b_blk][0];
300 blk[i][0] = clip_dc(blk[i][0] + dc);
305 blk[i][k * 8] += self.pred_coeffs[b_mb].hor[b_blk][k];
308 blk[i][k * 8] = clip_ac(blk[i][k * 8]);
313 blk[i][0] = clip_dc(blk[i][0]);
318 blk[i][k] += self.pred_coeffs[a_mb].ver[a_blk][k];
321 blk[i][k] = clip_ac(blk[i][k]);
326 blk[i][0] = clip_dc(blk[i][0]);
328 ACPredMode::None => {},
330 for t in 0..8 { self.pred_coeffs[mb_pos].hor[i][t] = blk[i][t * 8]; }
331 for t in 0..8 { self.pred_coeffs[mb_pos].ver[i][t] = blk[i][t]; }
333 bdsp.idct(&mut blk[i]);
335 blockdsp::put_blocks(&mut buf, mb_x, mb_y, &blk);
336 mvi.set_zero_mv(mb_x);
338 mvi2.set_zero_mv(mb_x);
340 } else if (binfo.mode != Type::B) && !binfo.is_skipped() {
341 if binfo.get_num_mvs() == 1 {
342 let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
344 self.mv_data.push(BlockMVInfo::Inter_1MV(mv));
346 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
347 bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, mv);
350 let mut mv: [MV; 4] = [ZERO_MV, ZERO_MV, ZERO_MV, ZERO_MV];
352 mv[blk_no] = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
353 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
354 bdsp.copy_blocks(&mut buf, srcbuf,
355 mb_x * 16 + (blk_no & 1) * 8,
356 mb_y * 16 + (blk_no & 2) * 4, 8, 8, mv[blk_no]);
360 self.mv_data.push(BlockMVInfo::Inter_4MV(mv));
364 bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
365 bdsp.idct(&mut blk[i]);
367 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
368 } else if binfo.mode != Type::B {
369 self.mv_data.push(BlockMVInfo::Inter_1MV(ZERO_MV));
370 mvi.set_zero_mv(mb_x);
371 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
372 bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV);
375 let ref_mv_info = self.mv_data[mb_pos];
376 let has_fwd = binfo.get_num_mvs() > 0;
377 let has_bwd = binfo.get_num_mvs2() > 0;
379 if has_fwd || has_bwd {
382 fwd_mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
385 mvi.set_zero_mv(mb_x);
389 bwd_mv = mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
392 mvi2.set_zero_mv(mb_x);
394 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
395 if has_fwd && has_bwd {
396 bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, fwd_mv);
397 bdsp.avg_blocks (&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, bwd_mv);
399 bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, fwd_mv);
401 bdsp.copy_blocks(&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, bwd_mv);
405 if let BlockMVInfo::Inter_4MV(mvs) = ref_mv_info {
407 let ref_mv = mvs[blk_no];
408 let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
409 let ref_mv_bwd = ref_mv - ref_mv_fwd;
410 let xoff = mb_x * 16 + (blk_no & 1) * 8;
411 let yoff = mb_y * 16 + (blk_no & 2) * 4;
412 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
413 bdsp.copy_blocks(&mut buf, fwd_buf, xoff, yoff, 8, 8, ref_mv_fwd);
414 bdsp.avg_blocks (&mut buf, bck_buf, xoff, yoff, 8, 8, ref_mv_bwd);
418 let ref_mv = if let BlockMVInfo::Inter_1MV(mv_) = ref_mv_info { mv_ } else { ZERO_MV };
419 let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
420 let ref_mv_bwd = MV::b_sub(ref_mv, ref_mv_fwd, ZERO_MV, bsdiff, tsdiff);
422 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
423 bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, ref_mv_fwd);
424 bdsp.avg_blocks (&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, ref_mv_bwd);
427 mvi.set_zero_mv(mb_x);
428 mvi2.set_zero_mv(mb_x);
432 bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
433 bdsp.idct(&mut blk[i]);
435 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
439 let mut b_mb = BMB::new();
440 let cbp = binfo.get_cbp_b();
441 let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2;
443 if bq < 1 { bquant = 1; }
444 else if bq > 31 { bquant = 31; }
445 else { bquant = bq as u8; }
449 bd.decode_block_inter(&binfo, &sstate, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?;
450 bdsp.idct(&mut b_mb.blk[i]);
453 let is_fwd = !binfo.is_b_fwd();
455 b_mb.num_mv = binfo.get_num_mvs();
456 if binfo.get_num_mvs() == 0 {
458 b_mb.mv_f[0] = binfo.get_mv2(1);
459 b_mb.mv_b[0] = binfo.get_mv2(0);
460 } else if binfo.get_num_mvs() == 1 {
461 let src_mv = binfo.get_mv(0).scale(bsdiff, tsdiff);
462 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
463 let mv_b = MV::b_sub(binfo.get_mv(0), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
468 let src_mv = binfo.get_mv(blk_no).scale(bsdiff, tsdiff);
469 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
470 let mv_b = MV::b_sub(binfo.get_mv(blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
471 b_mb.mv_f[blk_no] = mv_f;
472 b_mb.mv_b[blk_no] = mv_b;
475 self.b_data.push(b_mb);
480 if let Some(plusinfo) = pinfo.plusinfo {
481 if plusinfo.deblock {
482 bdsp.filter_row(&mut buf, mb_y, self.mb_w, &cbpi);
490 if pinfo.mode.is_ref() {
491 self.ipbs.add_frame(buf);
492 self.next_ts = self.last_ts;
493 self.last_ts = pinfo.ts;
494 self.tsdiff = tsdiff;
500 pub fn get_bframe(&mut self, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
501 if !self.has_b || !self.ipbs.get_lastref().is_some() || !self.ipbs.get_nextref().is_some() {
502 return Err(DecoderError::MissingReference);
506 let fmt = formats::YUV420_FORMAT;
507 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
508 let bufret = alloc_video_buffer(vinfo, 4);
509 if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
510 let mut bufinfo = bufret.unwrap();
511 let mut b_buf = bufinfo.get_vbuf().unwrap();
513 if let (Some(ref bck_buf), Some(ref fwd_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
514 recon_b_frame(&mut b_buf, bck_buf, fwd_buf, self.mb_w, self.mb_h, &self.b_data, bdsp);
517 self.b_data.truncate(0);
522 fn recon_b_frame(b_buf: &mut NAVideoBuffer<u8>, bck_buf: &NAVideoBuffer<u8>, fwd_buf: &NAVideoBuffer<u8>,
523 mb_w: usize, mb_h: usize, b_data: &Vec<BMB>, bdsp: &BlockDSP) {
524 let mut cbpi = CBPInfo::new();
527 for mb_y in 0..mb_h {
528 for mb_x in 0..mb_w {
529 let num_mv = b_data[cur_mb].num_mv;
530 let is_fwd = b_data[cur_mb].fwd;
531 let cbp = b_data[cur_mb].cbp;
532 cbpi.set_cbp(mb_x, cbp);
534 bdsp.copy_blocks(b_buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_b[0]);
536 bdsp.avg_blocks(b_buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_f[0]);
540 let xpos = mb_x * 16 + (blk_no & 1) * 8;
541 let ypos = mb_y * 16 + (blk_no & 2) * 4;
542 bdsp.copy_blocks(b_buf, fwd_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_b[blk_no]);
544 bdsp.avg_blocks(b_buf, bck_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_f[blk_no]);
549 blockdsp::add_blocks(b_buf, mb_x, mb_y, &b_data[cur_mb].blk);