1 use nihav_core::codecs::DecoderResult;
2 use super::{MV, ZERO_MV};
3 use nihav_core::frame::{NAVideoBuffer, NAVideoBufferRef};
5 #[allow(clippy::erasing_op)]
6 #[allow(clippy::many_single_char_names)]
9 #[allow(clippy::needless_range_loop)]
12 pub trait BlockDecoder {
13 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo>;
14 fn decode_slice_header(&mut self, pinfo: &PicInfo) -> DecoderResult<SliceInfo>;
15 fn decode_block_header(&mut self, pinfo: &PicInfo, sinfo: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo>;
16 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>;
17 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>;
18 fn is_slice_end(&mut self) -> bool;
22 fn idct(&self, blk: &mut [i16; 64]);
23 fn copy_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: NAVideoBufferRef<u8>, xpos: usize, ypos: usize, mv: MV);
24 fn copy_blocks8x8(&self, dst: &mut NAVideoBuffer<u8>, src: NAVideoBufferRef<u8>, xpos: usize, ypos: usize, mvs: &[MV; 4]);
25 fn avg_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: NAVideoBufferRef<u8>, xpos: usize, ypos: usize, mv: MV);
26 fn avg_blocks8x8(&self, dst: &mut NAVideoBuffer<u8>, src: NAVideoBufferRef<u8>, xpos: usize, ypos: usize, mvs: &[MV; 4]);
27 fn filter_row(&self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo);
31 #[derive(Debug,Clone,Copy,PartialEq)]
33 I, P, PB, Skip, B, Special
37 pub fn is_ref(self) -> bool {
39 Type::I | Type::P | Type::PB => true,
46 #[derive(Debug,Clone,Copy)]
54 pub fn new(trb: u8, dbquant: u8, improved: bool) -> Self {
55 PBInfo{ trb, dbquant, improved }
57 pub fn get_trb(self) -> u8 { self.trb }
58 pub fn get_dbquant(self) -> u8 { self.dbquant }
59 pub fn is_improved(self) -> bool { self.improved }
63 #[derive(Debug,Clone,Copy)]
72 pub pb: Option<PBInfo>,
74 pub plusinfo: Option<PlusInfo>,
79 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 {
86 pub fn get_width(&self) -> usize { self.w }
87 pub fn get_height(&self) -> usize { self.h }
88 pub fn get_mode(&self) -> Type { self.mode }
89 pub fn get_quant(&self) -> u8 { self.quant }
90 pub fn get_apm(&self) -> bool { self.apm }
91 pub fn is_pb(&self) -> bool { self.pb.is_some() }
92 pub fn is_ipb(&self) -> bool {
93 if let Some(ref pbi) = self.pb {
99 pub fn get_ts(&self) -> u16 { self.ts }
100 pub fn get_pbinfo(&self) -> PBInfo { self.pb.unwrap() }
101 pub fn get_plusifo(&self) -> Option<PlusInfo> { self.plusinfo }
102 pub fn get_mvmode(&self) -> MVMode { self.mvmode }
106 #[derive(Debug,Clone,Copy)]
107 pub struct PlusInfo {
115 pub fn new(aic: bool, deblock: bool, aiv_mode: bool, mq_mode: bool) -> Self {
116 PlusInfo { aic, deblock, aiv_mode, mq_mode }
121 #[derive(Debug,Clone,Copy)]
122 pub struct SliceInfo {
130 #[derive(Debug,Clone,Copy)]
131 pub struct SliceState {
135 pub first_line: bool,
137 pub slice_mb_x: usize,
138 pub slice_mb_y: usize,
142 const SLICE_NO_END: usize = 99999999;
145 pub fn new(mb_x: usize, mb_y: usize, mb_end: usize, quant: u8) -> Self {
146 SliceInfo{ mb_x, mb_y, mb_end, quant }
148 pub fn new_gob(mb_x: usize, mb_y: usize, quant: u8) -> Self {
149 SliceInfo{ mb_x, mb_y, mb_end: SLICE_NO_END, quant }
151 pub fn get_default_slice(pinfo: &PicInfo) -> Self {
152 SliceInfo{ mb_x: 0, mb_y: 0, mb_end: SLICE_NO_END, quant: pinfo.get_quant() }
154 pub fn get_quant(&self) -> u8 { self.quant }
155 pub fn is_at_end(&self, mb_pos: usize) -> bool { self.mb_end == mb_pos }
156 pub fn needs_check(&self) -> bool { self.mb_end == SLICE_NO_END }
160 pub fn new(is_iframe: bool) -> Self {
162 is_iframe, mb_x: 0, mb_y: 0, first_line: true, first_mb: true,
163 slice_mb_x: 0, slice_mb_y: 0, quant: 0
166 pub fn next_mb(&mut self) {
167 self.mb_x += 1; self.first_mb = false;
168 if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y {
169 self.first_line = false;
172 pub fn new_row(&mut self) {
173 self.mb_x = 0; self.mb_y += 1;
174 if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y {
175 self.first_line = false;
177 self.first_mb = true;
179 pub fn reset_slice(&mut self, smb_x: usize, smb_y: usize) {
180 self.slice_mb_x = smb_x;
181 self.slice_mb_y = smb_y;
182 self.first_line = true;
183 self.first_mb = true;
187 #[derive(Debug,Clone,Copy)]
188 pub struct BlockInfo {
201 pub acpred: ACPredMode,
205 #[derive(Debug,Clone,Copy)]
206 pub struct BBlockInfo {
213 #[allow(non_camel_case_types)]
214 #[derive(Debug,Clone,Copy)]
215 pub enum BlockMVInfo {
222 #[derive(Debug,Clone,Copy,PartialEq)]
223 pub enum ACPredMode {
232 pub fn new(mode: Type, cbp: u8, q: u8) -> Self {
234 intra: mode == Type::I,
235 skip: (cbp == 0) && (mode != Type::I),
239 mv: [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)],
243 mv2: [ZERO_MV, ZERO_MV],
246 acpred: ACPredMode::None,
249 pub fn is_intra(&self) -> bool { self.intra }
250 pub fn is_skipped(&self) -> bool { self.skip }
251 pub fn get_mode(&self) -> Type { self.mode }
252 pub fn get_cbp(&self) -> u8 { self.cbp }
253 pub fn get_q(&self) -> u8 { self.q }
254 pub fn get_num_mvs(&self) -> usize { self.num_mv }
255 pub fn get_mv(&self, idx: usize) -> MV { self.mv[idx] }
256 pub fn has_b_part(&self) -> bool { self.bpart }
257 pub fn get_cbp_b(&self) -> u8 { self.b_cbp }
258 pub fn get_num_mvs2(&self) -> usize { self.num_mv2 }
259 pub fn get_mv2(&self, idx: usize) -> MV { self.mv2[idx] }
260 pub fn set_mv(&mut self, mvs: &[MV]) {
261 if !mvs.is_empty() { self.skip = false; }
262 let mut mv_arr: [MV; 4] = [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)];
263 for i in 0..mvs.len() { mv_arr[i] = mvs[i]; }
265 self.num_mv = mvs.len();
267 pub fn set_bpart(&mut self, bbinfo: BBlockInfo) {
268 self.bpart = bbinfo.present;
269 self.b_cbp = bbinfo.cbp;
270 self.fwd = bbinfo.fwd;
271 self.num_mv2 = bbinfo.get_num_mv();
273 pub fn set_b_mv(&mut self, mvs: &[MV]) {
274 if !mvs.is_empty() { self.skip = false; }
275 let mut mv_arr: [MV; 2] = [ZERO_MV, ZERO_MV];
276 for i in 0..mvs.len() { mv_arr[i] = mvs[i]; }
278 self.num_mv2 = mvs.len();
280 pub fn is_b_fwd(&self) -> bool { self.fwd }
281 pub fn set_acpred(&mut self, acpred: ACPredMode) { self.acpred = acpred }
282 pub fn get_acpred(&self) -> ACPredMode { self.acpred }
286 pub fn new(present: bool, cbp: u8, num_mv: usize, fwd: bool) -> Self {
294 pub fn get_num_mv(&self) -> usize { self.num_mv }
297 #[derive(Debug,Clone,Copy)]
304 pub trait H263MVTrait {
305 fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV;
306 fn scale(&self, trb: u16, trd: u16) -> MV;
307 fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV;
310 impl H263MVTrait for MV {
311 fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV {
312 let mut new_mv = pred_mv + add;
315 if new_mv.x >= 64 { new_mv.x -= 64; }
316 else if new_mv.x <= -64 { new_mv.x += 64; }
317 if new_mv.y >= 64 { new_mv.y -= 64; }
318 else if new_mv.y <= -64 { new_mv.y += 64; }
321 if new_mv.x > 31 { new_mv.x -= 64; }
322 else if new_mv.x < -32 { new_mv.x += 64; }
323 if new_mv.y > 31 { new_mv.y -= 64; }
324 else if new_mv.y < -32 { new_mv.y += 64; }
327 if pred_mv.x > 32 && new_mv.x > 63 { new_mv.x -= 64; }
328 if pred_mv.x < -31 && new_mv.x < -63 { new_mv.x += 64; }
329 if pred_mv.y > 32 && new_mv.y > 63 { new_mv.y -= 64; }
330 if pred_mv.y < -31 && new_mv.y < -63 { new_mv.y += 64; }
335 fn scale(&self, trb: u16, trd: u16) -> MV {
336 if (trd == 0) || (trb == 0) {
339 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 }
342 fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV {
343 let bscale = (trb as i32) - (trd as i32);
344 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 };
345 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 };
358 fn new() -> Self { CBPInfo{ cbp: Vec::new(), q: Vec::new(), mb_w: 0 } }
359 fn reset(&mut self, mb_w: usize) {
362 self.cbp.resize(self.mb_w * 2, 0);
364 self.q.resize(self.mb_w * 2, 0);
366 fn update_row(&mut self) {
367 for i in 0..self.mb_w {
368 self.cbp[i] = self.cbp[self.mb_w + i];
369 self.q[i] = self.q[self.mb_w + i];
372 fn set_cbp(&mut self, mb_x: usize, cbp: u8) {
373 self.cbp[self.mb_w + mb_x] = cbp;
375 fn set_q(&mut self, mb_x: usize, q: u8) {
376 self.q[self.mb_w + mb_x] = q;
378 pub fn get_q(&self, mb_x: usize) -> u8 { self.q[mb_x] }
379 pub fn is_coded(&self, mb_x: usize, blk_no: usize) -> bool {
380 (self.cbp[self.mb_w + mb_x] & (1 << (5 - blk_no))) != 0
382 pub fn is_coded_top(&self, mb_x: usize, blk_no: usize) -> bool {
383 let cbp = self.cbp[self.mb_w + mb_x];
384 let cbp_top = self.cbp[mb_x];
386 0 => { (cbp_top & 0b001000) != 0 },
387 1 => { (cbp_top & 0b000100) != 0 },
388 2 => { (cbp & 0b100000) != 0 },
389 3 => { (cbp & 0b010000) != 0 },
390 4 => { (cbp_top & 0b000010) != 0 },
391 _ => { (cbp_top & 0b000001) != 0 },