2 use nihav_core::codecs::DecoderError;
3 use nihav_core::frame::*;
5 use super::super::blockdsp;
8 use nihav_core::formats;
21 fn new() -> Self { MVInfo{ mv: Vec::new(), mb_w: 0, mb_stride: 0, mb_start: 0, top: true, mvmode: MVMode::Old } }
22 fn reset(&mut self, mb_w: usize, mb_start: usize, mvmode: MVMode) {
23 self.mb_start = mb_start;
25 self.mb_stride = mb_w * 2 + 2;
26 self.mv.resize(self.mb_stride * 3, ZERO_MV);
29 fn update_row(&mut self) {
30 self.mb_start = self.mb_w + 1;
32 for i in 0..self.mb_stride {
33 self.mv[i] = self.mv[self.mb_stride * 2 + i];
36 #[allow(non_snake_case)]
37 fn predict(&mut self, mb_x: usize, blk_no: usize, use4: bool, diff: MV, first_line: bool, first_mb: bool) -> MV {
41 let last = mb_x == self.mb_w - 1;
44 if mb_x != self.mb_start {
45 A = if !first_mb { self.mv[self.mb_stride + mb_x * 2 - 1] } else { ZERO_MV };
46 B = if !first_line { self.mv[ mb_x * 2] } else { A };
47 C = if !first_line && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV };
49 A = ZERO_MV; B = ZERO_MV; C = ZERO_MV;
53 A = self.mv[self.mb_stride + mb_x * 2];
54 B = if !first_line { self.mv[mb_x * 2 + 1] } else { A };
55 C = if !first_line && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV/*A*/ };
58 A = if mb_x != self.mb_start { self.mv[self.mb_stride * 2 + mb_x * 2 - 1] } else { ZERO_MV };
59 B = self.mv[self.mb_stride + mb_x * 2];
60 C = self.mv[self.mb_stride + mb_x * 2 + 1];
63 A = self.mv[self.mb_stride * 2 + mb_x * 2];
64 B = self.mv[self.mb_stride * 1 + mb_x * 2 + 1];
65 C = self.mv[self.mb_stride * 1 + mb_x * 2];
67 _ => { return ZERO_MV; }
69 let pred_mv = MV::pred(A, B, C);
70 let new_mv = MV::add_umv(pred_mv, diff, self.mvmode);
72 self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv;
73 self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv;
74 self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv;
75 self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv;
78 0 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv; },
79 1 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv; },
80 2 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv; },
81 3 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv; },
88 fn set_zero_mv(&mut self, mb_x: usize) {
89 self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = ZERO_MV;
90 self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = ZERO_MV;
91 self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = ZERO_MV;
92 self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = ZERO_MV;
94 fn get_mv(&self, mb_x: usize, blk_no: usize) -> MV {
95 self.mv[self.mb_stride + mb_x * 2 + (blk_no & 1) + (blk_no >> 1) * self.mb_stride]
100 #[derive(Clone,Copy)]
111 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} }
114 #[derive(Clone,Copy)]
120 const ZERO_PRED_COEFFS: PredCoeffs = PredCoeffs { hor: [[0; 8]; 6], ver: [[0; 8]; 6] };
122 pub const H263DEC_OPT_USES_GOB: u32 = 0x0001;
123 pub const H263DEC_OPT_SLICE_RESET: u32 = 0x0002;
124 pub const H263DEC_OPT_HAS_B_FRAMES: u32 = 0x0004;
126 pub struct H263BaseDecoder {
139 pred_coeffs: Vec<PredCoeffs>,
142 may_have_b_frames: bool,
143 mv_data: Vec<BlockMVInfo>,
148 fn clip_dc(dc: i16) -> i16 {
150 else if dc > 2046 { 2047 }
155 fn clip_ac(ac: i16) -> i16 {
156 if ac < -2048 { -2048 }
157 else if ac > 2047 { 2047 }
162 impl H263BaseDecoder {
163 pub fn new_with_opts(options: u32) -> Self {
164 let is_gob = (options & H263DEC_OPT_USES_GOB) != 0;
165 let slice_reset = (options & H263DEC_OPT_SLICE_RESET) != 0;
166 let may_have_b_frames = (options & H263DEC_OPT_HAS_B_FRAMES) != 0;
168 w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0,
169 ftype: Type::Special,
170 ipbs: IPBShuffler::new(),
171 last_ts: 0, next_ts: 0, tsdiff: 0,
172 has_b: false, b_data: Vec::new(),
173 pred_coeffs: Vec::new(),
180 pub fn new(is_gob: bool) -> Self {
181 Self::new_with_opts(H263DEC_OPT_SLICE_RESET | (if is_gob { H263DEC_OPT_USES_GOB } else { 0 }))
183 pub fn new_b_frames(is_gob: bool) -> Self {
184 Self::new_with_opts(H263DEC_OPT_SLICE_RESET | H263DEC_OPT_HAS_B_FRAMES | (if is_gob { H263DEC_OPT_USES_GOB } else { 0 }))
187 pub fn is_intra(&self) -> bool { self.ftype == Type::I }
188 pub fn get_frame_type(&self) -> FrameType {
190 Type::I => FrameType::I,
191 Type::P => FrameType::P,
192 Type::B => FrameType::B,
193 Type::PB => FrameType::P,
194 Type::Skip => FrameType::Skip,
195 Type::Special => FrameType::Skip,
198 pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) }
200 fn decode_intra_mb(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP, mb_pos: usize, binfo: &BlockInfo, sstate: &SliceState, apply_acpred: bool) -> DecoderResult<()> {
202 bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (binfo.cbp & (1 << (5 - i))) != 0, &mut self.blk[i])?;
203 if apply_acpred && (binfo.acpred != ACPredMode::None) {
204 let has_b = (i == 1) || (i == 3) || !sstate.first_mb;
205 let has_a = (i == 2) || (i == 3) || !sstate.first_line;
206 let (b_mb, b_blk) = if has_b {
207 if (i == 1) || (i == 3) {
215 let (a_mb, a_blk) = if has_a {
216 if (i == 2) || (i == 3) {
219 (mb_pos - self.mb_w, i + 2)
221 (mb_pos - self.mb_w, i)
228 dc = (self.pred_coeffs[b_mb].hor[b_blk][0] + self.pred_coeffs[a_mb].ver[a_blk][0]) / 2;
230 dc = self.pred_coeffs[a_mb].ver[a_blk][0];
232 dc = self.pred_coeffs[b_mb].hor[b_blk][0];
236 self.blk[i][0] = clip_dc(self.blk[i][0] + dc);
241 self.blk[i][k * 8] += self.pred_coeffs[b_mb].hor[b_blk][k];
244 self.blk[i][k * 8] = clip_ac(self.blk[i][k * 8]);
247 self.blk[i][0] += 1024;
249 self.blk[i][0] = clip_dc(self.blk[i][0]);
254 self.blk[i][k] += self.pred_coeffs[a_mb].ver[a_blk][k];
257 self.blk[i][k] = clip_ac(self.blk[i][k]);
260 self.blk[i][0] += 1024;
262 self.blk[i][0] = clip_dc(self.blk[i][0]);
264 ACPredMode::None => {},
266 for t in 0..8 { self.pred_coeffs[mb_pos].hor[i][t] = self.blk[i][t * 8]; }
267 for t in 0..8 { self.pred_coeffs[mb_pos].ver[i][t] = self.blk[i][t]; }
269 bdsp.idct(&mut self.blk[i]);
273 fn decode_inter_mb(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP, binfo: &BlockInfo, sstate: &SliceState) -> DecoderResult<()> {
275 bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((binfo.cbp >> (5 - i)) & 1) != 0, &mut self.blk[i])?;
276 bdsp.idct(&mut self.blk[i]);
280 pub fn parse_frame(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
281 let pinfo = bd.decode_pichdr()?;
282 let mut mvi = MVInfo::new();
283 let mut mvi2 = MVInfo::new();
284 let mut cbpi = CBPInfo::new();
286 //todo handle res change
289 self.mb_w = (pinfo.w + 15) >> 4;
290 self.mb_h = (pinfo.h + 15) >> 4;
291 self.num_mb = self.mb_w * self.mb_h;
292 self.ftype = pinfo.mode;
293 self.has_b = pinfo.is_pb();
296 self.mv_data.truncate(0);
299 let save_b_data = pinfo.mode.is_ref() && self.may_have_b_frames;
301 self.mv_data.truncate(0);
303 let is_b = pinfo.mode == Type::B;
305 if is_b && (self.mv_data.len() < self.mb_w * self.mb_h) {
306 return Err(DecoderError::MissingReference);
309 let tsdiff = if pinfo.is_pb() { pinfo.ts.wrapping_sub(self.last_ts) >> 1 }
310 else { self.last_ts.wrapping_sub(self.next_ts) >> 1 };
311 let bsdiff = if pinfo.is_pb() { (pinfo.get_pbinfo().get_trb() as u16) << 7 }
312 else { pinfo.ts.wrapping_sub(self.next_ts) >> 1 };
314 let fmt = formats::YUV420_FORMAT;
315 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
316 let bufinfo = alloc_video_buffer(vinfo, 4)?;
317 let mut buf = bufinfo.get_vbuf().unwrap();
319 let mut slice = if self.is_gob {
320 SliceInfo::get_default_slice(&pinfo)
322 bd.decode_slice_header(&pinfo)?
324 mvi.reset(self.mb_w, 0, pinfo.get_mvmode());
325 if is_b || pinfo.is_pb() {
326 mvi2.reset(self.mb_w, 0, pinfo.get_mvmode());
328 cbpi.reset(self.mb_w);
330 let mut sstate = SliceState::new(pinfo.mode == Type::I);
332 let apply_acpred = (pinfo.mode == Type::I) && pinfo.plusinfo.is_some() && pinfo.plusinfo.unwrap().aic;
334 self.pred_coeffs.truncate(0);
335 self.pred_coeffs.resize(self.mb_w * self.mb_h, ZERO_PRED_COEFFS);
337 sstate.quant = slice.quant;
338 for mb_y in 0..self.mb_h {
339 for mb_x in 0..self.mb_w {
340 self.blk = [[0; 64]; 6];
342 if slice.is_at_end(mb_pos) || (slice.needs_check() && mb_pos > 0 && bd.is_slice_end()) {
343 slice = bd.decode_slice_header(&pinfo)?;
344 if !self.is_gob && self.slice_reset {
345 mvi.reset(self.mb_w, mb_x, pinfo.get_mvmode());
346 if is_b || pinfo.is_pb() {
347 mvi2.reset(self.mb_w, mb_x, pinfo.get_mvmode());
349 cbpi.reset(self.mb_w);
350 sstate.reset_slice(mb_x, mb_y);
351 sstate.quant = slice.quant;
355 let binfo = bd.decode_block_header(&pinfo, &slice, &sstate)?;
356 let cbp = binfo.get_cbp();
357 cbpi.set_cbp(mb_x, cbp);
358 cbpi.set_q(mb_x, binfo.get_q());
359 sstate.quant = binfo.get_q();
360 if binfo.is_intra() {
362 self.mv_data.push(BlockMVInfo::Intra);
364 self.decode_intra_mb(bd, bdsp, mb_pos, &binfo, &sstate, apply_acpred)?;
365 blockdsp::put_blocks(&mut buf, mb_x, mb_y, &self.blk);
366 mvi.set_zero_mv(mb_x);
368 mvi2.set_zero_mv(mb_x);
369 } else if pinfo.is_pb() {
370 mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
372 } else if (binfo.mode != Type::B) && !binfo.is_skipped() {
373 if binfo.get_num_mvs() == 1 {
374 let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
376 self.mv_data.push(BlockMVInfo::Inter_1MV(mv));
378 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
379 bdsp.copy_blocks(&mut buf, srcbuf.clone(), mb_x * 16, mb_y * 16, mv);
382 mvi2.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
385 let mut mv: [MV; 4] = [ZERO_MV, ZERO_MV, ZERO_MV, ZERO_MV];
387 mv[blk_no] = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
389 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
390 bdsp.copy_blocks8x8(&mut buf, srcbuf.clone(), mb_x * 16, mb_y * 16, &mv);
394 mvi2.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
398 self.mv_data.push(BlockMVInfo::Inter_4MV(mv));
401 self.decode_inter_mb(bd, bdsp, &binfo, &sstate)?;
402 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &self.blk);
403 if is_b && !pinfo.is_pb() {
404 mvi2.set_zero_mv(mb_x);
406 } else if binfo.mode != Type::B {
407 self.mv_data.push(BlockMVInfo::Inter_1MV(ZERO_MV));
408 mvi.set_zero_mv(mb_x);
409 if is_b || pinfo.is_pb() {
410 mvi2.set_zero_mv(mb_x);
412 if let Some(ref srcbuf) = self.ipbs.get_lastref() {
413 bdsp.copy_blocks(&mut buf, srcbuf.clone(), mb_x * 16, mb_y * 16, ZERO_MV);
416 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);
418 self.decode_inter_mb(bd, bdsp, &binfo, &sstate)?;
419 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &self.blk);
423 let mut b_mb = BMB::new();
424 let cbp = binfo.get_cbp_b();
425 let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2;
427 if bq < 1 { bquant = 1; }
428 else if bq > 31 { bquant = 31; }
429 else { bquant = bq as u8; }
433 bd.decode_block_inter(&binfo, &sstate, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?;
434 bdsp.idct(&mut b_mb.blk[i]);
437 let is_fwd = binfo.is_b_fwd();
439 if binfo.get_num_mvs() != 4 {
440 let ref_mv = mvi2.get_mv(mb_x, 0);
441 let b_mv = if binfo.is_intra() { binfo.get_mv2(1) } else { binfo.get_mv2(0) };
442 let src_mv = if is_fwd { ZERO_MV } else { ref_mv.scale(bsdiff, tsdiff) };
443 let mv_f = MV::add_umv(src_mv, b_mv, pinfo.get_mvmode());
444 let mv_b = MV::b_sub(ref_mv, mv_f, b_mv, bsdiff, tsdiff);
450 let src_mv = if is_fwd { ZERO_MV } else { mvi2.get_mv(mb_x, blk_no).scale(bsdiff, tsdiff) };
451 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
452 let mv_b = MV::b_sub(mvi2.get_mv(mb_x, blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
453 b_mb.mv_f[blk_no] = mv_f;
454 b_mb.mv_b[blk_no] = mv_b;
458 self.b_data.push(b_mb);
463 if let Some(plusinfo) = pinfo.plusinfo {
464 if plusinfo.deblock {
465 bdsp.filter_row(&mut buf, mb_y, self.mb_w, &cbpi);
469 if is_b || pinfo.is_pb() {
476 if pinfo.mode.is_ref() {
477 self.ipbs.add_frame(buf);
478 self.next_ts = self.last_ts;
479 self.last_ts = pinfo.ts;
480 self.tsdiff = tsdiff;
485 pub fn flush(&mut self) {
489 pub fn get_bframe(&mut self, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
490 if !self.has_b || self.ipbs.get_lastref().is_none() || self.ipbs.get_nextref().is_none() {
491 return Err(DecoderError::MissingReference);
495 let fmt = formats::YUV420_FORMAT;
496 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
497 let bufinfo = alloc_video_buffer(vinfo, 4)?;
498 let b_buf = bufinfo.get_vbuf().unwrap();
500 if let (Some(ref bck_buf), Some(ref fwd_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
501 recon_b_frame(b_buf, fwd_buf.clone(), bck_buf.clone(), self.mb_w, self.mb_h, self.b_data.as_slice(), bdsp);
504 self.b_data.truncate(0);
509 fn recon_b_mb(buf: &mut NAVideoBuffer<u8>, ipbs: &mut IPBShuffler, bdsp: &BlockDSP, mvi: &mut MVInfo, mvi2: &mut MVInfo, mb_pos: usize, mb_w: usize, sstate: &SliceState, binfo: &BlockInfo, mv_data: &[BlockMVInfo], bsdiff: u16, tsdiff: u16) {
510 let mb_x = mb_pos % mb_w;
511 let mb_y = mb_pos / mb_w;
513 let ref_mv_info = mv_data[mb_pos];
514 let has_fwd = binfo.get_num_mvs() > 0;
515 let has_bwd = binfo.get_num_mvs2() > 0;
517 if has_fwd || has_bwd {
520 fwd_mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
523 mvi.set_zero_mv(mb_x);
527 bwd_mv = mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
530 mvi2.set_zero_mv(mb_x);
532 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (ipbs.get_nextref(), ipbs.get_lastref()) {
533 if has_fwd && has_bwd {
534 bdsp.copy_blocks(buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, fwd_mv);
535 bdsp.avg_blocks (buf, bck_buf.clone(), mb_x * 16, mb_y * 16, bwd_mv);
537 bdsp.copy_blocks(buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, fwd_mv);
539 bdsp.copy_blocks(buf, bck_buf.clone(), mb_x * 16, mb_y * 16, bwd_mv);
543 if let BlockMVInfo::Inter_4MV(mvs) = ref_mv_info {
544 let mut mv_f = [ZERO_MV; 4];
545 let mut mv_b = [ZERO_MV; 4];
547 let ref_mv = mvs[blk_no];
548 let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
549 let ref_mv_bwd = ref_mv - ref_mv_fwd;
550 mv_f[blk_no] = ref_mv_fwd;
551 mv_b[blk_no] = ref_mv_bwd;
553 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (ipbs.get_nextref(), ipbs.get_lastref()) {
554 bdsp.copy_blocks8x8(buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, &mv_f);
555 bdsp.avg_blocks8x8 (buf, bck_buf.clone(), mb_x * 16, mb_y * 16, &mv_b);
558 let ref_mv = if let BlockMVInfo::Inter_1MV(mv_) = ref_mv_info { mv_ } else { ZERO_MV };
559 let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
560 let ref_mv_bwd = MV::b_sub(ref_mv, ref_mv_fwd, ZERO_MV, bsdiff, tsdiff);
562 if let (Some(ref fwd_buf), Some(ref bck_buf)) = (ipbs.get_nextref(), ipbs.get_lastref()) {
563 bdsp.copy_blocks(buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, ref_mv_fwd);
564 bdsp.avg_blocks (buf, bck_buf.clone(), mb_x * 16, mb_y * 16, ref_mv_bwd);
567 mvi.set_zero_mv(mb_x);
568 mvi2.set_zero_mv(mb_x);
572 fn recon_b_frame(mut b_buf: NAVideoBufferRef<u8>, bck_buf: NAVideoBufferRef<u8>, fwd_buf: NAVideoBufferRef<u8>,
573 mb_w: usize, mb_h: usize, b_data: &[BMB], bdsp: &BlockDSP) {
574 let mut cbpi = CBPInfo::new();
577 for mb_y in 0..mb_h {
578 for mb_x in 0..mb_w {
579 let num_mv = b_data[cur_mb].num_mv;
580 let is_fwd = b_data[cur_mb].fwd;
581 let cbp = b_data[cur_mb].cbp;
582 cbpi.set_cbp(mb_x, cbp);
584 bdsp.copy_blocks(&mut b_buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, b_data[cur_mb].mv_b[0]);
586 bdsp.avg_blocks(&mut b_buf, bck_buf.clone(), mb_x * 16, mb_y * 16, b_data[cur_mb].mv_f[0]);
589 bdsp.copy_blocks8x8(&mut b_buf, fwd_buf.clone(), mb_x * 16, mb_y * 16, &b_data[cur_mb].mv_b);
591 bdsp.avg_blocks8x8(&mut b_buf, bck_buf.clone(), mb_x * 16, mb_y * 16, &b_data[cur_mb].mv_f);
595 blockdsp::add_blocks(&mut b_buf, mb_x, mb_y, &b_data[cur_mb].blk);