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1 | use nihav_core::codecs::DecoderResult; | |
2 | use super::{MV, ZERO_MV}; | |
3 | use nihav_core::frame::NAVideoBuffer; | |
4 | ||
5 | #[allow(clippy::many_single_char_names)] | |
6 | pub mod code; | |
7 | pub mod data; | |
8 | #[allow(clippy::needless_range_loop)] | |
9 | pub mod decoder; | |
10 | ||
11 | pub trait BlockDecoder { | |
12 | fn decode_pichdr(&mut self) -> DecoderResult<PicInfo>; | |
13 | fn decode_slice_header(&mut self, pinfo: &PicInfo) -> DecoderResult<SliceInfo>; | |
14 | fn decode_block_header(&mut self, pinfo: &PicInfo, sinfo: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo>; | |
15 | fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>; | |
16 | fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>; | |
17 | fn is_slice_end(&mut self) -> bool; | |
18 | } | |
19 | ||
20 | pub trait BlockDSP { | |
21 | fn idct(&self, blk: &mut [i16; 64]); | |
22 | fn copy_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV); | |
23 | fn avg_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV); | |
24 | fn filter_row(&self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo); | |
25 | } | |
26 | ||
27 | #[allow(dead_code)] | |
28 | #[derive(Debug,Clone,Copy,PartialEq)] | |
29 | pub enum Type { | |
30 | I, P, PB, Skip, B, Special | |
31 | } | |
32 | ||
33 | impl Type { | |
34 | pub fn is_ref(self) -> bool { | |
35 | match self { | |
36 | Type::I | Type::P | Type::PB => true, | |
37 | _ => false, | |
38 | } | |
39 | } | |
40 | } | |
41 | ||
42 | #[allow(dead_code)] | |
43 | #[derive(Debug,Clone,Copy)] | |
44 | pub struct PBInfo { | |
45 | trb: u8, | |
46 | dbquant: u8, | |
47 | improved: bool, | |
48 | } | |
49 | ||
50 | impl PBInfo { | |
51 | pub fn new(trb: u8, dbquant: u8, improved: bool) -> Self { | |
52 | PBInfo{ trb, dbquant, improved } | |
53 | } | |
54 | pub fn get_trb(self) -> u8 { self.trb } | |
55 | pub fn get_dbquant(self) -> u8 { self.dbquant } | |
56 | pub fn is_improved(self) -> bool { self.improved } | |
57 | } | |
58 | ||
59 | #[allow(dead_code)] | |
60 | #[derive(Debug,Clone,Copy)] | |
61 | pub struct PicInfo { | |
62 | pub w: usize, | |
63 | pub h: usize, | |
64 | pub mode: Type, | |
65 | pub mvmode: MVMode, | |
66 | pub umv: bool, | |
67 | pub apm: bool, | |
68 | pub quant: u8, | |
69 | pub pb: Option<PBInfo>, | |
70 | pub ts: u16, | |
71 | pub plusinfo: Option<PlusInfo>, | |
72 | } | |
73 | ||
74 | #[allow(dead_code)] | |
75 | impl PicInfo { | |
76 | 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 { | |
77 | PicInfo { | |
78 | w, h, mode, mvmode, | |
79 | umv, apm, quant, | |
80 | pb, ts, plusinfo | |
81 | } | |
82 | } | |
83 | pub fn get_width(&self) -> usize { self.w } | |
84 | pub fn get_height(&self) -> usize { self.h } | |
85 | pub fn get_mode(&self) -> Type { self.mode } | |
86 | pub fn get_quant(&self) -> u8 { self.quant } | |
87 | pub fn get_apm(&self) -> bool { self.apm } | |
88 | pub fn is_pb(&self) -> bool { self.pb.is_some() } | |
89 | pub fn is_ipb(&self) -> bool { | |
90 | if let Some(ref pbi) = self.pb { | |
91 | pbi.is_improved() | |
92 | } else { | |
93 | false | |
94 | } | |
95 | } | |
96 | pub fn get_ts(&self) -> u16 { self.ts } | |
97 | pub fn get_pbinfo(&self) -> PBInfo { self.pb.unwrap() } | |
98 | pub fn get_plusifo(&self) -> Option<PlusInfo> { self.plusinfo } | |
99 | pub fn get_mvmode(&self) -> MVMode { self.mvmode } | |
100 | } | |
101 | ||
102 | #[allow(dead_code)] | |
103 | #[derive(Debug,Clone,Copy)] | |
104 | pub struct PlusInfo { | |
105 | pub aic: bool, | |
106 | pub deblock: bool, | |
107 | pub aiv_mode: bool, | |
108 | pub mq_mode: bool, | |
109 | } | |
110 | ||
111 | impl PlusInfo { | |
112 | pub fn new(aic: bool, deblock: bool, aiv_mode: bool, mq_mode: bool) -> Self { | |
113 | PlusInfo { aic, deblock, aiv_mode, mq_mode } | |
114 | } | |
115 | } | |
116 | ||
117 | #[allow(dead_code)] | |
118 | #[derive(Debug,Clone,Copy)] | |
119 | pub struct SliceInfo { | |
120 | pub mb_x: usize, | |
121 | pub mb_y: usize, | |
122 | pub mb_end: usize, | |
123 | pub quant: u8, | |
124 | } | |
125 | ||
126 | #[allow(dead_code)] | |
127 | #[derive(Debug,Clone,Copy)] | |
128 | pub struct SliceState { | |
129 | pub is_iframe: bool, | |
130 | pub mb_x: usize, | |
131 | pub mb_y: usize, | |
132 | pub first_line: bool, | |
133 | pub first_mb: bool, | |
134 | pub slice_mb_x: usize, | |
135 | pub slice_mb_y: usize, | |
136 | pub quant: u8, | |
137 | } | |
138 | ||
139 | const SLICE_NO_END: usize = 99999999; | |
140 | ||
141 | impl SliceInfo { | |
142 | pub fn new(mb_x: usize, mb_y: usize, mb_end: usize, quant: u8) -> Self { | |
143 | SliceInfo{ mb_x, mb_y, mb_end, quant } | |
144 | } | |
145 | pub fn new_gob(mb_x: usize, mb_y: usize, quant: u8) -> Self { | |
146 | SliceInfo{ mb_x, mb_y, mb_end: SLICE_NO_END, quant } | |
147 | } | |
148 | pub fn get_default_slice(pinfo: &PicInfo) -> Self { | |
149 | SliceInfo{ mb_x: 0, mb_y: 0, mb_end: SLICE_NO_END, quant: pinfo.get_quant() } | |
150 | } | |
151 | pub fn get_quant(&self) -> u8 { self.quant } | |
152 | pub fn is_at_end(&self, mb_pos: usize) -> bool { self.mb_end == mb_pos } | |
153 | pub fn needs_check(&self) -> bool { self.mb_end == SLICE_NO_END } | |
154 | } | |
155 | ||
156 | impl SliceState { | |
157 | pub fn new(is_iframe: bool) -> Self { | |
158 | SliceState { | |
159 | is_iframe, mb_x: 0, mb_y: 0, first_line: true, first_mb: true, | |
160 | slice_mb_x: 0, slice_mb_y: 0, quant: 0 | |
161 | } | |
162 | } | |
163 | pub fn next_mb(&mut self) { | |
164 | self.mb_x += 1; self.first_mb = false; | |
165 | if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y { | |
166 | self.first_line = false; | |
167 | } | |
168 | } | |
169 | pub fn new_row(&mut self) { | |
170 | self.mb_x = 0; self.mb_y += 1; | |
171 | if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y { | |
172 | self.first_line = false; | |
173 | } | |
174 | self.first_mb = true; | |
175 | } | |
176 | pub fn reset_slice(&mut self, smb_x: usize, smb_y: usize) { | |
177 | self.slice_mb_x = smb_x; | |
178 | self.slice_mb_y = smb_y; | |
179 | self.first_line = true; | |
180 | self.first_mb = true; | |
181 | } | |
182 | } | |
183 | ||
184 | #[derive(Debug,Clone,Copy)] | |
185 | pub struct BlockInfo { | |
186 | pub intra: bool, | |
187 | pub skip: bool, | |
188 | pub mode: Type, | |
189 | pub cbp: u8, | |
190 | pub q: u8, | |
191 | pub mv: [MV; 4], | |
192 | pub num_mv: usize, | |
193 | pub bpart: bool, | |
194 | pub b_cbp: u8, | |
195 | pub mv2: [MV; 2], | |
196 | pub num_mv2: usize, | |
197 | pub fwd: bool, | |
198 | pub acpred: ACPredMode, | |
199 | } | |
200 | ||
201 | #[allow(dead_code)] | |
202 | #[derive(Debug,Clone,Copy)] | |
203 | pub struct BBlockInfo { | |
204 | present: bool, | |
205 | cbp: u8, | |
206 | num_mv: usize, | |
207 | fwd: bool, | |
208 | } | |
209 | ||
210 | #[allow(non_camel_case_types)] | |
211 | #[derive(Debug,Clone,Copy)] | |
212 | pub enum BlockMVInfo { | |
213 | Intra, | |
214 | Inter_1MV(MV), | |
215 | Inter_4MV([MV; 4]), | |
216 | } | |
217 | ||
218 | #[allow(dead_code)] | |
219 | #[derive(Debug,Clone,Copy,PartialEq)] | |
220 | pub enum ACPredMode { | |
221 | None, | |
222 | DC, | |
223 | Ver, | |
224 | Hor, | |
225 | } | |
226 | ||
227 | #[allow(dead_code)] | |
228 | impl BlockInfo { | |
229 | pub fn new(mode: Type, cbp: u8, q: u8) -> Self { | |
230 | BlockInfo { | |
231 | intra: mode == Type::I, | |
232 | skip: (cbp == 0) && (mode != Type::I), | |
233 | mode, | |
234 | cbp, | |
235 | q, | |
236 | mv: [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)], | |
237 | num_mv: 0, | |
238 | bpart: false, | |
239 | b_cbp: 0, | |
240 | mv2: [ZERO_MV, ZERO_MV], | |
241 | num_mv2: 0, | |
242 | fwd: false, | |
243 | acpred: ACPredMode::None, | |
244 | } | |
245 | } | |
246 | pub fn is_intra(&self) -> bool { self.intra } | |
247 | pub fn is_skipped(&self) -> bool { self.skip } | |
248 | pub fn get_mode(&self) -> Type { self.mode } | |
249 | pub fn get_cbp(&self) -> u8 { self.cbp } | |
250 | pub fn get_q(&self) -> u8 { self.q } | |
251 | pub fn get_num_mvs(&self) -> usize { self.num_mv } | |
252 | pub fn get_mv(&self, idx: usize) -> MV { self.mv[idx] } | |
253 | pub fn has_b_part(&self) -> bool { self.bpart } | |
254 | pub fn get_cbp_b(&self) -> u8 { self.b_cbp } | |
255 | pub fn get_num_mvs2(&self) -> usize { self.num_mv2 } | |
256 | pub fn get_mv2(&self, idx: usize) -> MV { self.mv2[idx] } | |
257 | pub fn set_mv(&mut self, mvs: &[MV]) { | |
258 | if !mvs.is_empty() { self.skip = false; } | |
259 | let mut mv_arr: [MV; 4] = [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)]; | |
260 | for i in 0..mvs.len() { mv_arr[i] = mvs[i]; } | |
261 | self.mv = mv_arr; | |
262 | self.num_mv = mvs.len(); | |
263 | } | |
264 | pub fn set_bpart(&mut self, bbinfo: BBlockInfo) { | |
265 | self.bpart = bbinfo.present; | |
266 | self.b_cbp = bbinfo.cbp; | |
267 | self.fwd = bbinfo.fwd; | |
268 | self.num_mv2 = bbinfo.get_num_mv(); | |
269 | } | |
270 | pub fn set_b_mv(&mut self, mvs: &[MV]) { | |
271 | if !mvs.is_empty() { self.skip = false; } | |
272 | let mut mv_arr: [MV; 2] = [ZERO_MV, ZERO_MV]; | |
273 | for i in 0..mvs.len() { mv_arr[i] = mvs[i]; } | |
274 | self.mv2 = mv_arr; | |
275 | self.num_mv2 = mvs.len(); | |
276 | } | |
277 | pub fn is_b_fwd(&self) -> bool { self.fwd } | |
278 | pub fn set_acpred(&mut self, acpred: ACPredMode) { self.acpred = acpred } | |
279 | pub fn get_acpred(&self) -> ACPredMode { self.acpred } | |
280 | } | |
281 | ||
282 | impl BBlockInfo { | |
283 | pub fn new(present: bool, cbp: u8, num_mv: usize, fwd: bool) -> Self { | |
284 | BBlockInfo { | |
285 | present, | |
286 | cbp, | |
287 | num_mv, | |
288 | fwd, | |
289 | } | |
290 | } | |
291 | pub fn get_num_mv(&self) -> usize { self.num_mv } | |
292 | } | |
293 | ||
294 | #[derive(Debug,Clone,Copy)] | |
295 | pub enum MVMode { | |
296 | Old, | |
297 | Long, | |
298 | UMV, | |
299 | } | |
300 | ||
301 | pub trait H263MVTrait { | |
302 | fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV; | |
303 | fn scale(&self, trb: u16, trd: u16) -> MV; | |
304 | fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV; | |
305 | } | |
306 | ||
307 | impl H263MVTrait for MV { | |
308 | fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV { | |
309 | let mut new_mv = pred_mv + add; | |
310 | match mvmode { | |
311 | MVMode::Old => { | |
312 | if new_mv.x >= 64 { new_mv.x -= 64; } | |
313 | else if new_mv.x <= -64 { new_mv.x += 64; } | |
314 | if new_mv.y >= 64 { new_mv.y -= 64; } | |
315 | else if new_mv.y <= -64 { new_mv.y += 64; } | |
316 | }, | |
317 | MVMode::Long => { | |
318 | if new_mv.x > 31 { new_mv.x -= 64; } | |
319 | else if new_mv.x < -32 { new_mv.x += 64; } | |
320 | if new_mv.y > 31 { new_mv.y -= 64; } | |
321 | else if new_mv.y < -32 { new_mv.y += 64; } | |
322 | }, | |
323 | MVMode::UMV => { | |
324 | if pred_mv.x > 32 && new_mv.x > 63 { new_mv.x -= 64; } | |
325 | if pred_mv.x < -31 && new_mv.x < -63 { new_mv.x += 64; } | |
326 | if pred_mv.y > 32 && new_mv.y > 63 { new_mv.y -= 64; } | |
327 | if pred_mv.y < -31 && new_mv.y < -63 { new_mv.y += 64; } | |
328 | }, | |
329 | }; | |
330 | new_mv | |
331 | } | |
332 | fn scale(&self, trb: u16, trd: u16) -> MV { | |
333 | if (trd == 0) || (trb == 0) { | |
334 | ZERO_MV | |
335 | } else { | |
336 | 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 } | |
337 | } | |
338 | } | |
339 | fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV { | |
340 | let bscale = (trb as i32) - (trd as i32); | |
341 | 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 }; | |
342 | 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 }; | |
343 | MV { x, y } | |
344 | } | |
345 | } | |
346 | ||
347 | #[allow(dead_code)] | |
348 | pub struct CBPInfo { | |
349 | cbp: Vec<u8>, | |
350 | q: Vec<u8>, | |
351 | mb_w: usize, | |
352 | } | |
353 | ||
354 | impl CBPInfo { | |
355 | fn new() -> Self { CBPInfo{ cbp: Vec::new(), q: Vec::new(), mb_w: 0 } } | |
356 | fn reset(&mut self, mb_w: usize) { | |
357 | self.mb_w = mb_w; | |
358 | self.cbp.truncate(0); | |
359 | self.cbp.resize(self.mb_w * 2, 0); | |
360 | self.q.truncate(0); | |
361 | self.q.resize(self.mb_w * 2, 0); | |
362 | } | |
363 | fn update_row(&mut self) { | |
364 | for i in 0..self.mb_w { | |
365 | self.cbp[i] = self.cbp[self.mb_w + i]; | |
366 | self.q[i] = self.q[self.mb_w + i]; | |
367 | } | |
368 | } | |
369 | fn set_cbp(&mut self, mb_x: usize, cbp: u8) { | |
370 | self.cbp[self.mb_w + mb_x] = cbp; | |
371 | } | |
372 | fn set_q(&mut self, mb_x: usize, q: u8) { | |
373 | self.q[self.mb_w + mb_x] = q; | |
374 | } | |
375 | pub fn get_q(&self, mb_x: usize) -> u8 { self.q[mb_x] } | |
376 | pub fn is_coded(&self, mb_x: usize, blk_no: usize) -> bool { | |
377 | (self.cbp[self.mb_w + mb_x] & (1 << (5 - blk_no))) != 0 | |
378 | } | |
379 | pub fn is_coded_top(&self, mb_x: usize, blk_no: usize) -> bool { | |
380 | let cbp = self.cbp[self.mb_w + mb_x]; | |
381 | let cbp_top = self.cbp[mb_x]; | |
382 | match blk_no { | |
383 | 0 => { (cbp_top & 0b001000) != 0 }, | |
384 | 1 => { (cbp_top & 0b000100) != 0 }, | |
385 | 2 => { (cbp & 0b100000) != 0 }, | |
386 | 3 => { (cbp & 0b010000) != 0 }, | |
387 | 4 => { (cbp_top & 0b000010) != 0 }, | |
388 | _ => { (cbp_top & 0b000001) != 0 }, | |
389 | } | |
390 | } | |
391 | } | |
392 |