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;
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) -> MV {
41 let last = mb_x == self.mb_w - 1;
44 if mb_x != self.mb_start {
45 A = if mb_x != 0 { self.mv[self.mb_stride + mb_x * 2 - 1] } else { ZERO_MV };
46 B = if !self.top { self.mv[ mb_x * 2] } else { A };
47 C = if !self.top && !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 !self.top { self.mv[mb_x * 2 + 1] } else { A };
55 C = if !self.top && !last { self.mv[mb_x * 2 + 2] } else { 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;
108 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} }
111 #[derive(Clone,Copy)]
117 const ZERO_PRED_COEFFS: PredCoeffs = PredCoeffs { hor: [[0; 8]; 6], ver: [[0; 8]; 6] };
119 pub struct H263BaseDecoder {
126 prev_frm: Option<NAVideoBuffer<u8>>,
127 cur_frm: Option<NAVideoBuffer<u8>>,
131 pred_coeffs: Vec<PredCoeffs>,
136 fn clip_dc(dc: i16) -> i16 {
138 else if dc > 2046 { 2046 }
139 else { (dc + 1) & !1 }
143 fn clip_ac(ac: i16) -> i16 {
144 if ac < -2048 { -2048 }
145 else if ac > 2047 { 2047 }
150 impl H263BaseDecoder {
151 pub fn new(is_gob: bool) -> Self {
153 w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0,
154 ftype: Type::Special,
155 prev_frm: None, cur_frm: None,
157 has_b: false, b_data: Vec::new(),
158 pred_coeffs: Vec::new(),
163 pub fn is_intra(&self) -> bool { self.ftype == Type::I }
164 pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) }
166 pub fn parse_frame(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
167 let pinfo = bd.decode_pichdr()?;
168 let mut mvi = MVInfo::new();
169 let mut cbpi = CBPInfo::new();
171 //todo handle res change
174 self.mb_w = (pinfo.w + 15) >> 4;
175 self.mb_h = (pinfo.h + 15) >> 4;
176 self.num_mb = self.mb_w * self.mb_h;
177 self.ftype = pinfo.mode;
178 self.has_b = pinfo.is_pb();
181 self.b_data.truncate(0);
184 mem::swap(&mut self.cur_frm, &mut self.prev_frm);
186 let tsdiff = pinfo.ts.wrapping_sub(self.last_ts);
187 let bsdiff = if pinfo.is_pb() { pinfo.get_pbinfo().get_trb() } else { 0 };
189 let fmt = formats::YUV420_FORMAT;
190 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
191 let bufret = alloc_video_buffer(vinfo, 4);
192 if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
193 let mut bufinfo = bufret.unwrap();
194 let mut buf = bufinfo.get_vbuf().unwrap();
196 let mut slice = if self.is_gob {
197 SliceInfo::get_default_slice(&pinfo)
199 bd.decode_slice_header(&pinfo)?
201 mvi.reset(self.mb_w, 0, pinfo.get_mvmode());
202 cbpi.reset(self.mb_w);
204 let mut blk: [[i16; 64]; 6] = [[0; 64]; 6];
205 let mut sstate = SliceState::new(pinfo.mode == Type::I);
207 let apply_acpred = (pinfo.mode == Type::I) && pinfo.plusinfo.is_some() && pinfo.plusinfo.unwrap().aic;
209 self.pred_coeffs.truncate(0);
210 self.pred_coeffs.resize(self.mb_w * self.mb_h, ZERO_PRED_COEFFS);
212 for mb_y in 0..self.mb_h {
213 for mb_x in 0..self.mb_w {
214 for i in 0..6 { for j in 0..64 { blk[i][j] = 0; } }
216 if slice.is_at_end(mb_pos) || (slice.needs_check() && mb_pos > 0 && bd.is_slice_end()) {
217 slice = bd.decode_slice_header(&pinfo)?;
218 //mvi.reset(self.mb_w, mb_x, pinfo.get_mvmode());
219 //cbpi.reset(self.mb_w);
222 let binfo = bd.decode_block_header(&pinfo, &slice, &sstate)?;
223 let cbp = binfo.get_cbp();
224 cbpi.set_cbp(mb_x, cbp);
225 cbpi.set_q(mb_x, binfo.get_q());
226 if binfo.is_intra() {
228 bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (cbp & (1 << (5 - i))) != 0, &mut blk[i])?;
229 if apply_acpred && (binfo.acpred != ACPredMode::None) {
230 let has_b = (i == 1) || (i == 3) || (mb_x > 0);
231 let has_a = (i == 2) || (i == 3) || (mb_y > 0);
232 let (b_mb, b_blk) = if has_b {
233 if (i == 1) || (i == 3) {
241 let (a_mb, a_blk) = if has_a {
242 if (i == 2) || (i == 3) {
245 (mb_pos - self.mb_w, i + 2)
247 (mb_pos - self.mb_w, i)
254 dc = (self.pred_coeffs[b_mb].hor[b_blk][0] + self.pred_coeffs[a_mb].ver[a_blk][0]) / 2;
256 dc = self.pred_coeffs[a_mb].ver[a_blk][0];
258 dc = self.pred_coeffs[b_mb].hor[b_blk][0];
262 blk[i][0] = clip_dc(blk[i][0] + dc);
267 blk[i][k * 8] += self.pred_coeffs[b_mb].hor[b_blk][k];
270 blk[i][k * 8] = clip_ac(blk[i][k * 8]);
275 blk[i][0] = clip_dc(blk[i][0]);
280 blk[i][k] += self.pred_coeffs[a_mb].ver[a_blk][k];
283 blk[i][k] = clip_ac(blk[i][k]);
288 blk[i][0] = clip_dc(blk[i][0]);
290 ACPredMode::None => {},
292 for t in 0..8 { self.pred_coeffs[mb_pos].hor[i][t] = blk[i][t * 8]; }
293 for t in 0..8 { self.pred_coeffs[mb_pos].ver[i][t] = blk[i][t]; }
295 h263_idct(&mut blk[i]);
297 blockdsp::put_blocks(&mut buf, mb_x, mb_y, &blk);
298 mvi.set_zero_mv(mb_x);
299 } else if !binfo.is_skipped() {
300 if binfo.get_num_mvs() == 1 {
301 let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0));
302 if let Some(ref srcbuf) = self.prev_frm {
303 bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, mv);
307 let mv = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no));
308 if let Some(ref srcbuf) = self.prev_frm {
309 bdsp.copy_blocks(&mut buf, srcbuf,
310 mb_x * 16 + (blk_no & 1) * 8,
311 mb_y * 16 + (blk_no & 2) * 4, 8, 8, mv);
316 bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
317 h263_idct(&mut blk[i]);
319 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
321 mvi.set_zero_mv(mb_x);
322 if let Some(ref srcbuf) = self.prev_frm {
323 bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV);
327 let mut b_mb = BMB::new();
328 let cbp = binfo.get_cbp_b();
329 let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2;
331 if bq < 1 { bquant = 1; }
332 else if bq > 31 { bquant = 31; }
333 else { bquant = bq as u8; }
337 bd.decode_block_inter(&binfo, &sstate, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?;
338 h263_idct(&mut b_mb.blk[i]);
341 let is_fwd = !binfo.is_b_fwd();
343 b_mb.num_mv = binfo.get_num_mvs();
344 if binfo.get_num_mvs() == 0 {
346 b_mb.mv_f[0] = binfo.get_mv2(1);
347 b_mb.mv_b[0] = binfo.get_mv2(0);
348 } else if binfo.get_num_mvs() == 1 {
349 let src_mv = binfo.get_mv(0).scale(bsdiff, tsdiff);
350 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
351 let mv_b = MV::b_sub(binfo.get_mv(0), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
356 let src_mv = binfo.get_mv(blk_no).scale(bsdiff, tsdiff);
357 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
358 let mv_b = MV::b_sub(binfo.get_mv(blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
359 b_mb.mv_f[blk_no] = mv_f;
360 b_mb.mv_b[blk_no] = mv_b;
363 self.b_data.push(b_mb);
368 if let Some(plusinfo) = pinfo.plusinfo {
369 if plusinfo.deblock {
370 bdsp.filter_row(&mut buf, mb_y, self.mb_w, &cbpi);
378 self.cur_frm = Some(buf);
379 self.last_ts = pinfo.ts;
383 pub fn get_bframe(&mut self, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
384 if !self.has_b || !self.cur_frm.is_some() || !self.prev_frm.is_some() {
385 return Err(DecoderError::MissingReference);
389 let fmt = formats::YUV420_FORMAT;
390 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
391 let bufret = alloc_video_buffer(vinfo, 4);
392 if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
393 let mut bufinfo = bufret.unwrap();
394 let mut b_buf = bufinfo.get_vbuf().unwrap();
396 if let Some(ref bck_buf) = self.prev_frm {
397 if let Some(ref fwd_buf) = self.cur_frm {
398 recon_b_frame(&mut b_buf, bck_buf, fwd_buf, self.mb_w, self.mb_h, &self.b_data, bdsp);
402 self.b_data.truncate(0);
407 fn recon_b_frame(b_buf: &mut NAVideoBuffer<u8>, bck_buf: &NAVideoBuffer<u8>, fwd_buf: &NAVideoBuffer<u8>,
408 mb_w: usize, mb_h: usize, b_data: &Vec<BMB>, bdsp: &BlockDSP) {
409 let mut cbpi = CBPInfo::new();
412 for mb_y in 0..mb_h {
413 for mb_x in 0..mb_w {
414 let num_mv = b_data[cur_mb].num_mv;
415 let is_fwd = b_data[cur_mb].fwd;
416 let cbp = b_data[cur_mb].cbp;
417 cbpi.set_cbp(mb_x, cbp);
419 bdsp.copy_blocks(b_buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_b[0]);
421 bdsp.avg_blocks(b_buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_f[0]);
425 let xpos = mb_x * 16 + (blk_no & 1) * 8;
426 let ypos = mb_y * 16 + (blk_no & 2) * 4;
427 bdsp.copy_blocks(b_buf, fwd_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_b[blk_no]);
429 bdsp.avg_blocks(b_buf, bck_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_f[blk_no]);
434 blockdsp::add_blocks(b_buf, mb_x, mb_y, &b_data[cur_mb].blk);