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1 | use super::{DecoderResult, MV, ZERO_MV}; | |
2 | use crate::frame::NAVideoBuffer; | |
3 | ||
4 | #[allow(clippy::many_single_char_names)] | |
5 | pub mod code; | |
6 | pub mod data; | |
7 | pub mod decoder; | |
8 | ||
9 | pub trait BlockDecoder { | |
10 | fn decode_pichdr(&mut self) -> DecoderResult<PicInfo>; | |
11 | fn decode_slice_header(&mut self, pinfo: &PicInfo) -> DecoderResult<SliceInfo>; | |
12 | fn decode_block_header(&mut self, pinfo: &PicInfo, sinfo: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo>; | |
13 | fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>; | |
14 | fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>; | |
15 | fn is_slice_end(&mut self) -> bool; | |
16 | } | |
17 | ||
18 | pub trait BlockDSP { | |
19 | fn idct(&self, blk: &mut [i16; 64]); | |
20 | fn copy_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV); | |
21 | fn avg_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV); | |
22 | fn filter_row(&self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo); | |
23 | } | |
24 | ||
25 | #[allow(dead_code)] | |
26 | #[derive(Debug,Clone,Copy,PartialEq)] | |
27 | pub enum Type { | |
28 | I, P, PB, Skip, B, Special | |
29 | } | |
30 | ||
31 | impl Type { | |
32 | pub fn is_ref(&self) -> bool { | |
33 | match *self { | |
34 | Type::I | Type::P | Type::PB => true, | |
35 | _ => false, | |
36 | } | |
37 | } | |
38 | } | |
39 | ||
40 | #[allow(dead_code)] | |
41 | #[derive(Debug,Clone,Copy)] | |
42 | pub struct PBInfo { | |
43 | trb: u8, | |
44 | dbquant: u8, | |
45 | improved: bool, | |
46 | } | |
47 | ||
48 | impl PBInfo { | |
49 | pub fn new(trb: u8, dbquant: u8, improved: bool) -> Self { | |
50 | PBInfo{ trb, dbquant, improved } | |
51 | } | |
52 | pub fn get_trb(&self) -> u8 { self.trb } | |
53 | pub fn get_dbquant(&self) -> u8 { self.dbquant } | |
54 | pub fn is_improved(&self) -> bool { self.improved } | |
55 | } | |
56 | ||
57 | #[allow(dead_code)] | |
58 | #[derive(Debug,Clone,Copy)] | |
59 | pub struct PicInfo { | |
60 | pub w: usize, | |
61 | pub h: usize, | |
62 | pub mode: Type, | |
63 | pub mvmode: MVMode, | |
64 | pub umv: bool, | |
65 | pub apm: bool, | |
66 | pub quant: u8, | |
67 | pub pb: Option<PBInfo>, | |
68 | pub ts: u16, | |
69 | pub plusinfo: Option<PlusInfo>, | |
70 | } | |
71 | ||
72 | #[allow(dead_code)] | |
73 | impl PicInfo { | |
74 | pub fn new(w: usize, h: usize, mode: Type, mvmode: MVMode, umv: bool, apm: bool, quant: u8, ts: u16, pb: Option<PBInfo>, plusinfo: Option<PlusInfo>) -> Self { | |
75 | PicInfo { | |
76 | w, h, mode, mvmode, | |
77 | umv, apm, quant, | |
78 | pb, ts, plusinfo | |
79 | } | |
80 | } | |
81 | pub fn get_width(&self) -> usize { self.w } | |
82 | pub fn get_height(&self) -> usize { self.h } | |
83 | pub fn get_mode(&self) -> Type { self.mode } | |
84 | pub fn get_quant(&self) -> u8 { self.quant } | |
85 | pub fn get_apm(&self) -> bool { self.apm } | |
86 | pub fn is_pb(&self) -> bool { self.pb.is_some() } | |
87 | pub fn is_ipb(&self) -> bool { | |
88 | if let Some(ref pbi) = self.pb { | |
89 | pbi.is_improved() | |
90 | } else { | |
91 | false | |
92 | } | |
93 | } | |
94 | pub fn get_ts(&self) -> u16 { self.ts } | |
95 | pub fn get_pbinfo(&self) -> PBInfo { self.pb.unwrap() } | |
96 | pub fn get_plusifo(&self) -> Option<PlusInfo> { self.plusinfo } | |
97 | pub fn get_mvmode(&self) -> MVMode { self.mvmode } | |
98 | } | |
99 | ||
100 | #[allow(dead_code)] | |
101 | #[derive(Debug,Clone,Copy)] | |
102 | pub struct PlusInfo { | |
103 | pub aic: bool, | |
104 | pub deblock: bool, | |
105 | pub aiv_mode: bool, | |
106 | pub mq_mode: bool, | |
107 | } | |
108 | ||
109 | impl PlusInfo { | |
110 | pub fn new(aic: bool, deblock: bool, aiv_mode: bool, mq_mode: bool) -> Self { | |
111 | PlusInfo { aic, deblock, aiv_mode, mq_mode } | |
112 | } | |
113 | } | |
114 | ||
115 | #[allow(dead_code)] | |
116 | #[derive(Debug,Clone,Copy)] | |
117 | pub struct SliceInfo { | |
118 | pub mb_x: usize, | |
119 | pub mb_y: usize, | |
120 | pub mb_end: usize, | |
121 | pub quant: u8, | |
122 | } | |
123 | ||
124 | #[allow(dead_code)] | |
125 | #[derive(Debug,Clone,Copy)] | |
126 | pub struct SliceState { | |
127 | pub is_iframe: bool, | |
128 | pub mb_x: usize, | |
129 | pub mb_y: usize, | |
130 | pub first_line: bool, | |
131 | pub first_mb: bool, | |
132 | pub slice_mb_x: usize, | |
133 | pub slice_mb_y: usize, | |
134 | pub quant: u8, | |
135 | } | |
136 | ||
137 | const SLICE_NO_END: usize = 99999999; | |
138 | ||
139 | impl SliceInfo { | |
140 | pub fn new(mb_x: usize, mb_y: usize, mb_end: usize, quant: u8) -> Self { | |
141 | SliceInfo{ mb_x, mb_y, mb_end, quant } | |
142 | } | |
143 | pub fn new_gob(mb_x: usize, mb_y: usize, quant: u8) -> Self { | |
144 | SliceInfo{ mb_x, mb_y, mb_end: SLICE_NO_END, quant } | |
145 | } | |
146 | pub fn get_default_slice(pinfo: &PicInfo) -> Self { | |
147 | SliceInfo{ mb_x: 0, mb_y: 0, mb_end: SLICE_NO_END, quant: pinfo.get_quant() } | |
148 | } | |
149 | pub fn get_quant(&self) -> u8 { self.quant } | |
150 | pub fn is_at_end(&self, mb_pos: usize) -> bool { self.mb_end == mb_pos } | |
151 | pub fn needs_check(&self) -> bool { self.mb_end == SLICE_NO_END } | |
152 | } | |
153 | ||
154 | impl SliceState { | |
155 | pub fn new(is_iframe: bool) -> Self { | |
156 | SliceState { | |
157 | is_iframe, mb_x: 0, mb_y: 0, first_line: true, first_mb: true, | |
158 | slice_mb_x: 0, slice_mb_y: 0, quant: 0 | |
159 | } | |
160 | } | |
161 | pub fn next_mb(&mut self) { | |
162 | self.mb_x += 1; self.first_mb = false; | |
163 | if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y { | |
164 | self.first_line = false; | |
165 | } | |
166 | } | |
167 | pub fn new_row(&mut self) { | |
168 | self.mb_x = 0; self.mb_y += 1; | |
169 | if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y { | |
170 | self.first_line = false; | |
171 | } | |
172 | self.first_mb = true; | |
173 | } | |
174 | pub fn reset_slice(&mut self, smb_x: usize, smb_y: usize) { | |
175 | self.slice_mb_x = smb_x; | |
176 | self.slice_mb_y = smb_y; | |
177 | self.first_line = true; | |
178 | self.first_mb = true; | |
179 | } | |
180 | } | |
181 | ||
182 | #[derive(Debug,Clone,Copy)] | |
183 | pub struct BlockInfo { | |
184 | pub intra: bool, | |
185 | pub skip: bool, | |
186 | pub mode: Type, | |
187 | pub cbp: u8, | |
188 | pub q: u8, | |
189 | pub mv: [MV; 4], | |
190 | pub num_mv: usize, | |
191 | pub bpart: bool, | |
192 | pub b_cbp: u8, | |
193 | pub mv2: [MV; 2], | |
194 | pub num_mv2: usize, | |
195 | pub fwd: bool, | |
196 | pub acpred: ACPredMode, | |
197 | } | |
198 | ||
199 | #[allow(dead_code)] | |
200 | #[derive(Debug,Clone,Copy)] | |
201 | pub struct BBlockInfo { | |
202 | present: bool, | |
203 | cbp: u8, | |
204 | num_mv: usize, | |
205 | fwd: bool, | |
206 | } | |
207 | ||
208 | #[allow(non_camel_case_types)] | |
209 | #[derive(Debug,Clone,Copy)] | |
210 | pub enum BlockMVInfo { | |
211 | Intra, | |
212 | Inter_1MV(MV), | |
213 | Inter_4MV([MV; 4]), | |
214 | } | |
215 | ||
216 | #[allow(dead_code)] | |
217 | #[derive(Debug,Clone,Copy,PartialEq)] | |
218 | pub enum ACPredMode { | |
219 | None, | |
220 | DC, | |
221 | Ver, | |
222 | Hor, | |
223 | } | |
224 | ||
225 | #[allow(dead_code)] | |
226 | impl BlockInfo { | |
227 | pub fn new(mode: Type, cbp: u8, q: u8) -> Self { | |
228 | BlockInfo { | |
229 | intra: mode == Type::I, | |
230 | skip: (cbp == 0) && (mode != Type::I), | |
231 | mode, | |
232 | cbp, | |
233 | q, | |
234 | mv: [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)], | |
235 | num_mv: 0, | |
236 | bpart: false, | |
237 | b_cbp: 0, | |
238 | mv2: [ZERO_MV, ZERO_MV], | |
239 | num_mv2: 0, | |
240 | fwd: false, | |
241 | acpred: ACPredMode::None, | |
242 | } | |
243 | } | |
244 | pub fn is_intra(&self) -> bool { self.intra } | |
245 | pub fn is_skipped(&self) -> bool { self.skip } | |
246 | pub fn get_mode(&self) -> Type { self.mode } | |
247 | pub fn get_cbp(&self) -> u8 { self.cbp } | |
248 | pub fn get_q(&self) -> u8 { self.q } | |
249 | pub fn get_num_mvs(&self) -> usize { self.num_mv } | |
250 | pub fn get_mv(&self, idx: usize) -> MV { self.mv[idx] } | |
251 | pub fn has_b_part(&self) -> bool { self.bpart } | |
252 | pub fn get_cbp_b(&self) -> u8 { self.b_cbp } | |
253 | pub fn get_num_mvs2(&self) -> usize { self.num_mv2 } | |
254 | pub fn get_mv2(&self, idx: usize) -> MV { self.mv2[idx] } | |
255 | pub fn set_mv(&mut self, mvs: &[MV]) { | |
256 | if mvs.len() > 0 { self.skip = false; } | |
257 | let mut mv_arr: [MV; 4] = [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)]; | |
258 | for i in 0..mvs.len() { mv_arr[i] = mvs[i]; } | |
259 | self.mv = mv_arr; | |
260 | self.num_mv = mvs.len(); | |
261 | } | |
262 | pub fn set_bpart(&mut self, bbinfo: BBlockInfo) { | |
263 | self.bpart = bbinfo.present; | |
264 | self.b_cbp = bbinfo.cbp; | |
265 | self.fwd = bbinfo.fwd; | |
266 | self.num_mv2 = bbinfo.get_num_mv(); | |
267 | } | |
268 | pub fn set_b_mv(&mut self, mvs: &[MV]) { | |
269 | if mvs.len() > 0 { self.skip = false; } | |
270 | let mut mv_arr: [MV; 2] = [ZERO_MV, ZERO_MV]; | |
271 | for i in 0..mvs.len() { mv_arr[i] = mvs[i]; } | |
272 | self.mv2 = mv_arr; | |
273 | self.num_mv2 = mvs.len(); | |
274 | } | |
275 | pub fn is_b_fwd(&self) -> bool { self.fwd } | |
276 | pub fn set_acpred(&mut self, acpred: ACPredMode) { self.acpred = acpred } | |
277 | pub fn get_acpred(&self) -> ACPredMode { self.acpred } | |
278 | } | |
279 | ||
280 | impl BBlockInfo { | |
281 | pub fn new(present: bool, cbp: u8, num_mv: usize, fwd: bool) -> Self { | |
282 | BBlockInfo { | |
283 | present, | |
284 | cbp, | |
285 | num_mv, | |
286 | fwd, | |
287 | } | |
288 | } | |
289 | pub fn get_num_mv(&self) -> usize { self.num_mv } | |
290 | } | |
291 | ||
292 | #[derive(Debug,Clone,Copy)] | |
293 | pub enum MVMode { | |
294 | Old, | |
295 | Long, | |
296 | UMV, | |
297 | } | |
298 | ||
299 | pub trait H263MVTrait { | |
300 | fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV; | |
301 | fn scale(&self, trb: u16, trd: u16) -> MV; | |
302 | fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV; | |
303 | } | |
304 | ||
305 | impl H263MVTrait for MV { | |
306 | fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV { | |
307 | let mut new_mv = pred_mv + add; | |
308 | match mvmode { | |
309 | MVMode::Old => { | |
310 | if new_mv.x >= 64 { new_mv.x -= 64; } | |
311 | else if new_mv.x <= -64 { new_mv.x += 64; } | |
312 | if new_mv.y >= 64 { new_mv.y -= 64; } | |
313 | else if new_mv.y <= -64 { new_mv.y += 64; } | |
314 | }, | |
315 | MVMode::Long => { | |
316 | if new_mv.x > 31 { new_mv.x -= 64; } | |
317 | else if new_mv.x < -32 { new_mv.x += 64; } | |
318 | if new_mv.y > 31 { new_mv.y -= 64; } | |
319 | else if new_mv.y < -32 { new_mv.y += 64; } | |
320 | }, | |
321 | MVMode::UMV => { | |
322 | if pred_mv.x > 32 && new_mv.x > 63 { new_mv.x -= 64; } | |
323 | if pred_mv.x < -31 && new_mv.x < -63 { new_mv.x += 64; } | |
324 | if pred_mv.y > 32 && new_mv.y > 63 { new_mv.y -= 64; } | |
325 | if pred_mv.y < -31 && new_mv.y < -63 { new_mv.y += 64; } | |
326 | }, | |
327 | }; | |
328 | new_mv | |
329 | } | |
330 | fn scale(&self, trb: u16, trd: u16) -> MV { | |
331 | if (trd == 0) || (trb == 0) { | |
332 | ZERO_MV | |
333 | } else { | |
334 | MV { x: (((self.x as i32) * (trb as i32)) / (trd as i32)) as i16, y: (((self.y as i32) * (trb as i32)) / (trd as i32)) as i16 } | |
335 | } | |
336 | } | |
337 | fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV { | |
338 | let bscale = (trb as i32) - (trd as i32); | |
339 | let x = if bvec.x != 0 { fwdvec.x - pvec.x } else if trd != 0 { (bscale * (pvec.x as i32) / (trd as i32)) as i16 } else { 0 }; | |
340 | let y = if bvec.y != 0 { fwdvec.y - pvec.y } else if trd != 0 { (bscale * (pvec.y as i32) / (trd as i32)) as i16 } else { 0 }; | |
341 | MV { x, y } | |
342 | } | |
343 | } | |
344 | ||
345 | #[allow(dead_code)] | |
346 | pub struct CBPInfo { | |
347 | cbp: Vec<u8>, | |
348 | q: Vec<u8>, | |
349 | mb_w: usize, | |
350 | } | |
351 | ||
352 | impl CBPInfo { | |
353 | fn new() -> Self { CBPInfo{ cbp: Vec::new(), q: Vec::new(), mb_w: 0 } } | |
354 | fn reset(&mut self, mb_w: usize) { | |
355 | self.mb_w = mb_w; | |
356 | self.cbp.truncate(0); | |
357 | self.cbp.resize(self.mb_w * 2, 0); | |
358 | self.q.truncate(0); | |
359 | self.q.resize(self.mb_w * 2, 0); | |
360 | } | |
361 | fn update_row(&mut self) { | |
362 | for i in 0..self.mb_w { | |
363 | self.cbp[i] = self.cbp[self.mb_w + i]; | |
364 | self.q[i] = self.q[self.mb_w + i]; | |
365 | } | |
366 | } | |
367 | fn set_cbp(&mut self, mb_x: usize, cbp: u8) { | |
368 | self.cbp[self.mb_w + mb_x] = cbp; | |
369 | } | |
370 | fn set_q(&mut self, mb_x: usize, q: u8) { | |
371 | self.q[self.mb_w + mb_x] = q; | |
372 | } | |
373 | pub fn get_q(&self, mb_x: usize) -> u8 { self.q[mb_x] } | |
374 | pub fn is_coded(&self, mb_x: usize, blk_no: usize) -> bool { | |
375 | (self.cbp[self.mb_w + mb_x] & (1 << (5 - blk_no))) != 0 | |
376 | } | |
377 | pub fn is_coded_top(&self, mb_x: usize, blk_no: usize) -> bool { | |
378 | let cbp = self.cbp[self.mb_w + mb_x]; | |
379 | let cbp_top = self.cbp[mb_x]; | |
380 | match blk_no { | |
381 | 0 => { (cbp_top & 0b001000) != 0 }, | |
382 | 1 => { (cbp_top & 0b000100) != 0 }, | |
383 | 2 => { (cbp & 0b100000) != 0 }, | |
384 | 3 => { (cbp & 0b010000) != 0 }, | |
385 | 4 => { (cbp_top & 0b000010) != 0 }, | |
386 | _ => { (cbp_top & 0b000001) != 0 }, | |
387 | } | |
388 | } | |
389 | } | |
390 |