1 use nihav_core::codecs::DecoderResult;
2 use super::{MV, ZERO_MV};
3 use nihav_core::frame::NAVideoBuffer;
5 #[allow(clippy::many_single_char_names)]
8 #[allow(clippy::needless_range_loop)]
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;
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);
28 #[derive(Debug,Clone,Copy,PartialEq)]
30 I, P, PB, Skip, B, Special
34 pub fn is_ref(self) -> bool {
36 Type::I | Type::P | Type::PB => true,
43 #[derive(Debug,Clone,Copy)]
51 pub fn new(trb: u8, dbquant: u8, improved: bool) -> Self {
52 PBInfo{ trb, dbquant, improved }
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 }
60 #[derive(Debug,Clone,Copy)]
69 pub pb: Option<PBInfo>,
71 pub plusinfo: Option<PlusInfo>,
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 {
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 {
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 }
103 #[derive(Debug,Clone,Copy)]
104 pub struct PlusInfo {
112 pub fn new(aic: bool, deblock: bool, aiv_mode: bool, mq_mode: bool) -> Self {
113 PlusInfo { aic, deblock, aiv_mode, mq_mode }
118 #[derive(Debug,Clone,Copy)]
119 pub struct SliceInfo {
127 #[derive(Debug,Clone,Copy)]
128 pub struct SliceState {
132 pub first_line: bool,
134 pub slice_mb_x: usize,
135 pub slice_mb_y: usize,
139 const SLICE_NO_END: usize = 99999999;
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 }
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 }
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() }
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 }
157 pub fn new(is_iframe: bool) -> Self {
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
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;
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;
174 self.first_mb = true;
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;
184 #[derive(Debug,Clone,Copy)]
185 pub struct BlockInfo {
198 pub acpred: ACPredMode,
202 #[derive(Debug,Clone,Copy)]
203 pub struct BBlockInfo {
210 #[allow(non_camel_case_types)]
211 #[derive(Debug,Clone,Copy)]
212 pub enum BlockMVInfo {
219 #[derive(Debug,Clone,Copy,PartialEq)]
220 pub enum ACPredMode {
229 pub fn new(mode: Type, cbp: u8, q: u8) -> Self {
231 intra: mode == Type::I,
232 skip: (cbp == 0) && (mode != Type::I),
236 mv: [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)],
240 mv2: [ZERO_MV, ZERO_MV],
243 acpred: ACPredMode::None,
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]; }
262 self.num_mv = mvs.len();
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();
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]; }
275 self.num_mv2 = mvs.len();
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 }
283 pub fn new(present: bool, cbp: u8, num_mv: usize, fwd: bool) -> Self {
291 pub fn get_num_mv(&self) -> usize { self.num_mv }
294 #[derive(Debug,Clone,Copy)]
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;
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;
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; }
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; }
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; }
332 fn scale(&self, trb: u16, trd: u16) -> MV {
333 if (trd == 0) || (trb == 0) {
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 }
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 };
355 fn new() -> Self { CBPInfo{ cbp: Vec::new(), q: Vec::new(), mb_w: 0 } }
356 fn reset(&mut self, mb_w: usize) {
358 self.cbp.truncate(0);
359 self.cbp.resize(self.mb_w * 2, 0);
361 self.q.resize(self.mb_w * 2, 0);
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];
369 fn set_cbp(&mut self, mb_x: usize, cbp: u8) {
370 self.cbp[self.mb_w + mb_x] = cbp;
372 fn set_q(&mut self, mb_x: usize, q: u8) {
373 self.q[self.mb_w + mb_x] = q;
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
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];
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 },