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>,
135 fn clip_dc(dc: i16) -> i16 {
137 else if dc > 2046 { 2046 }
138 else { (dc + 1) & !1 }
142 fn clip_ac(ac: i16) -> i16 {
143 if ac < -2048 { -2048 }
144 else if ac > 2047 { 2047 }
149 impl H263BaseDecoder {
150 pub fn new() -> Self {
152 w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0,
153 ftype: Type::Special,
154 prev_frm: None, cur_frm: None,
156 has_b: false, b_data: Vec::new(),
157 pred_coeffs: Vec::new(),
161 pub fn is_intra(&self) -> bool { self.ftype == Type::I }
162 pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) }
164 pub fn parse_frame(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
165 let pinfo = bd.decode_pichdr()?;
166 let mut mvi = MVInfo::new();
167 let mut cbpi = CBPInfo::new();
169 //todo handle res change
172 self.mb_w = (pinfo.w + 15) >> 4;
173 self.mb_h = (pinfo.h + 15) >> 4;
174 self.num_mb = self.mb_w * self.mb_h;
175 self.ftype = pinfo.mode;
176 self.has_b = pinfo.is_pb();
179 self.b_data.truncate(0);
182 mem::swap(&mut self.cur_frm, &mut self.prev_frm);
184 let tsdiff = pinfo.ts.wrapping_sub(self.last_ts);
185 let bsdiff = if pinfo.is_pb() { pinfo.get_pbinfo().get_trb() } else { 0 };
187 let fmt = formats::YUV420_FORMAT;
188 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
189 let bufret = alloc_video_buffer(vinfo, 4);
190 if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
191 let mut bufinfo = bufret.unwrap();
192 let mut buf = bufinfo.get_vbuf().unwrap();
194 let mut slice = if bd.is_gob() {
195 SliceInfo::get_default_slice(&pinfo)
197 bd.decode_slice_header(&pinfo)?
199 mvi.reset(self.mb_w, 0, pinfo.get_mvmode());
200 cbpi.reset(self.mb_w);
202 let mut blk: [[i16; 64]; 6] = [[0; 64]; 6];
203 let mut sstate = SliceState::new(pinfo.mode == Type::I);
205 let apply_acpred = (pinfo.mode == Type::I) && pinfo.plusinfo.is_some() && pinfo.plusinfo.unwrap().aic;
207 self.pred_coeffs.truncate(0);
208 self.pred_coeffs.resize(self.mb_w * self.mb_h, ZERO_PRED_COEFFS);
210 for mb_y in 0..self.mb_h {
211 for mb_x in 0..self.mb_w {
212 for i in 0..6 { for j in 0..64 { blk[i][j] = 0; } }
214 if slice.is_at_end(mb_pos) || (slice.needs_check() && mb_pos > 0 && bd.is_slice_end()) {
215 slice = bd.decode_slice_header(&pinfo)?;
216 //mvi.reset(self.mb_w, mb_x, pinfo.get_mvmode());
217 //cbpi.reset(self.mb_w);
220 let binfo = bd.decode_block_header(&pinfo, &slice, &sstate)?;
221 let cbp = binfo.get_cbp();
222 cbpi.set_cbp(mb_x, cbp);
223 cbpi.set_q(mb_x, binfo.get_q());
224 if binfo.is_intra() {
226 bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (cbp & (1 << (5 - i))) != 0, &mut blk[i])?;
227 if apply_acpred && (binfo.acpred != ACPredMode::None) {
228 let has_b = (i == 1) || (i == 3) || (mb_x > 0);
229 let has_a = (i == 2) || (i == 3) || (mb_y > 0);
230 let (b_mb, b_blk) = if has_b {
231 if (i == 1) || (i == 3) {
239 let (a_mb, a_blk) = if has_a {
240 if (i == 2) || (i == 3) {
243 (mb_pos - self.mb_w, i + 2)
245 (mb_pos - self.mb_w, i)
252 dc = (self.pred_coeffs[b_mb].hor[b_blk][0] + self.pred_coeffs[a_mb].ver[a_blk][0]) / 2;
254 dc = self.pred_coeffs[a_mb].ver[a_blk][0];
256 dc = self.pred_coeffs[b_mb].hor[b_blk][0];
260 blk[i][0] = clip_dc(blk[i][0] + dc);
265 blk[i][k * 8] += self.pred_coeffs[b_mb].hor[b_blk][k];
268 blk[i][k * 8] = clip_ac(blk[i][k * 8]);
273 blk[i][0] = clip_dc(blk[i][0]);
278 blk[i][k] += self.pred_coeffs[a_mb].ver[a_blk][k];
281 blk[i][k] = clip_ac(blk[i][k]);
286 blk[i][0] = clip_dc(blk[i][0]);
288 ACPredMode::None => {},
290 for t in 0..8 { self.pred_coeffs[mb_pos].hor[i][t] = blk[i][t * 8]; }
291 for t in 0..8 { self.pred_coeffs[mb_pos].ver[i][t] = blk[i][t]; }
293 h263_idct(&mut blk[i]);
295 blockdsp::put_blocks(&mut buf, mb_x, mb_y, &blk);
296 mvi.set_zero_mv(mb_x);
297 } else if !binfo.is_skipped() {
298 if binfo.get_num_mvs() == 1 {
299 let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0));
300 if let Some(ref srcbuf) = self.prev_frm {
301 bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, mv);
305 let mv = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no));
306 if let Some(ref srcbuf) = self.prev_frm {
307 bdsp.copy_blocks(&mut buf, srcbuf,
308 mb_x * 16 + (blk_no & 1) * 8,
309 mb_y * 16 + (blk_no & 2) * 4, 8, 8, mv);
314 bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
315 h263_idct(&mut blk[i]);
317 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
319 mvi.set_zero_mv(mb_x);
320 if let Some(ref srcbuf) = self.prev_frm {
321 bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV);
325 let mut b_mb = BMB::new();
326 let cbp = binfo.get_cbp_b();
327 let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2;
329 if bq < 1 { bquant = 1; }
330 else if bq > 31 { bquant = 31; }
331 else { bquant = bq as u8; }
335 bd.decode_block_inter(&binfo, &sstate, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?;
336 h263_idct(&mut b_mb.blk[i]);
339 let is_fwd = !binfo.is_b_fwd();
341 b_mb.num_mv = binfo.get_num_mvs();
342 if binfo.get_num_mvs() == 0 {
344 b_mb.mv_f[0] = binfo.get_mv2(1);
345 b_mb.mv_b[0] = binfo.get_mv2(0);
346 } else if binfo.get_num_mvs() == 1 {
347 let src_mv = binfo.get_mv(0).scale(bsdiff, tsdiff);
348 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
349 let mv_b = MV::b_sub(binfo.get_mv(0), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
354 let src_mv = binfo.get_mv(blk_no).scale(bsdiff, tsdiff);
355 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
356 let mv_b = MV::b_sub(binfo.get_mv(blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
357 b_mb.mv_f[blk_no] = mv_f;
358 b_mb.mv_b[blk_no] = mv_b;
361 self.b_data.push(b_mb);
366 if let Some(plusinfo) = pinfo.plusinfo {
367 if plusinfo.deblock {
368 bdsp.filter_row(&mut buf, mb_y, self.mb_w, &cbpi);
376 self.cur_frm = Some(buf);
377 self.last_ts = pinfo.ts;
381 pub fn get_bframe(&mut self, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
382 if !self.has_b || !self.cur_frm.is_some() || !self.prev_frm.is_some() {
383 return Err(DecoderError::MissingReference);
387 let fmt = formats::YUV420_FORMAT;
388 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
389 let bufret = alloc_video_buffer(vinfo, 4);
390 if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
391 let mut bufinfo = bufret.unwrap();
392 let mut b_buf = bufinfo.get_vbuf().unwrap();
394 if let Some(ref bck_buf) = self.prev_frm {
395 if let Some(ref fwd_buf) = self.cur_frm {
396 recon_b_frame(&mut b_buf, bck_buf, fwd_buf, self.mb_w, self.mb_h, &self.b_data, bdsp);
400 self.b_data.truncate(0);
405 fn recon_b_frame(b_buf: &mut NAVideoBuffer<u8>, bck_buf: &NAVideoBuffer<u8>, fwd_buf: &NAVideoBuffer<u8>,
406 mb_w: usize, mb_h: usize, b_data: &Vec<BMB>, bdsp: &BlockDSP) {
407 let mut cbpi = CBPInfo::new();
410 for mb_y in 0..mb_h {
411 for mb_x in 0..mb_w {
412 let num_mv = b_data[cur_mb].num_mv;
413 let is_fwd = b_data[cur_mb].fwd;
414 let cbp = b_data[cur_mb].cbp;
415 cbpi.set_cbp(mb_x, cbp);
417 bdsp.copy_blocks(b_buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_b[0]);
419 bdsp.avg_blocks(b_buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_f[0]);
423 let xpos = mb_x * 16 + (blk_no & 1) * 8;
424 let ypos = mb_y * 16 + (blk_no & 2) * 4;
425 bdsp.copy_blocks(b_buf, fwd_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_b[blk_no]);
427 bdsp.avg_blocks(b_buf, bck_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_f[blk_no]);
432 blockdsp::add_blocks(b_buf, mb_x, mb_y, &b_data[cur_mb].blk);