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5b4210f902ada2e8339859e9f6dc84c1feda4449
[nihav.git] / nihav-duck / src / codecs / vp56.rs
1 use nihav_core::codecs::*;
2 use nihav_core::io::bitreader::*;
3 use nihav_codec_support::codecs::{MV, ZERO_MV};
4 use super::vpcommon::*;
5
6 pub const TOKEN_LARGE: u8 = 5;
7 pub const TOKEN_EOB: u8 = 42;
8
9 #[derive(Clone,Copy,Debug,Default)]
10 #[allow(dead_code)]
11 pub struct VP56Header {
12 pub is_intra: bool,
13 pub is_golden: bool,
14 pub quant: u8,
15 pub multistream: bool,
16 pub use_huffman: bool,
17 pub version: u8,
18 pub profile: u8,
19 pub interlaced: bool,
20 pub offset: u16,
21 pub mb_w: u8,
22 pub mb_h: u8,
23 pub disp_w: u8,
24 pub disp_h: u8,
25 pub scale: u8,
26 }
27
28 #[derive(Clone,Copy,Default)]
29 pub struct VP56MVModel {
30 pub nz_prob: u8,
31 pub sign_prob: u8,
32 pub raw_probs: [u8; 8],
33 pub tree_probs: [u8; 7],
34 }
35
36 #[derive(Clone,Copy,Default)]
37 pub struct VP56MBTypeModel {
38 pub probs: [u8; 10],
39 }
40
41 #[derive(Clone,Copy,Default)]
42 pub struct VP56CoeffModel {
43 pub dc_token_probs: [[[u8; 5]; 6]; 6],
44 pub dc_value_probs: [u8; 11],
45 pub ac_ctype_probs: [[[[u8; 5]; 5]; 6]; 3],
46 pub ac_type_probs: [[[[u8; 5]; 6]; 3]; 3],
47 pub ac_val_probs: [[[u8; 11]; 6]; 3],
48 }
49
50 pub struct VP6Models {
51 pub scan_order: [usize; 64],
52 pub scan: [usize; 64],
53 pub zigzag: [usize; 64],
54 pub zero_run_probs: [[u8; 14]; 2],
55 }
56
57 const MAX_HUFF_ELEMS: usize = 12;
58 #[derive(Clone,Copy,Default)]
59 pub struct VP6Huff {
60 pub codes: [u16; MAX_HUFF_ELEMS],
61 pub bits: [u8; MAX_HUFF_ELEMS],
62 }
63
64 #[derive(Clone,Copy,Default)]
65 struct Node {
66 weight: u16,
67 sym: i8,
68 ch0: usize,
69 ch1: usize,
70 }
71
72 fn prob2weight(a: u8, b: u8) -> u8 {
73 let w = ((u16::from(a) * u16::from(b)) >> 8) as u8;
74 if w == 0 {
75 1
76 } else {
77 w
78 }
79 }
80
81 impl VP6Huff {
82 fn build_codes(&mut self, probs: &[u8; 11]) {
83 let mut weights = [0u8; 12];
84
85 weights[11] = prob2weight( probs[0], probs[ 1]);
86 weights[ 0] = prob2weight( probs[0], !probs[ 1]);
87 weights[ 1] = prob2weight(!probs[0], probs[ 2]);
88 let lvroot = prob2weight(!probs[0], !probs[ 2]);
89 let tworoot = prob2weight( lvroot, probs[ 3]);
90 let hlroot = prob2weight( lvroot, !probs[ 3]);
91 weights[ 2] = prob2weight( tworoot, probs[ 4]);
92 let root34 = prob2weight( tworoot, !probs[ 4]);
93 weights[ 3] = prob2weight( root34, probs[ 5]);
94 weights[ 4] = prob2weight( root34, !probs[ 5]);
95 let c1root = prob2weight( hlroot, probs[ 6]);
96 let c34root = prob2weight( hlroot, !probs[ 6]);
97 weights[ 5] = prob2weight( c1root, probs[ 7]);
98 weights[ 6] = prob2weight( c1root, !probs[ 7]);
99 let c3root = prob2weight( c34root, probs[ 8]);
100 let c4root = prob2weight( c34root, !probs[ 8]);
101 weights[ 7] = prob2weight( c3root, probs[ 9]);
102 weights[ 8] = prob2weight( c3root, !probs[ 9]);
103 weights[ 9] = prob2weight( c4root, probs[10]);
104 weights[10] = prob2weight( c4root, !probs[10]);
105
106 self.build(&weights);
107 }
108 fn build_codes_zero_run(&mut self, probs: &[u8; 14]) {
109 let mut weights = [0u8; 9];
110
111 let root = prob2weight( probs[0], probs[1]);
112 weights[0] = prob2weight( root, probs[2]);
113 weights[1] = prob2weight( root, !probs[2]);
114
115 let root = prob2weight( probs[0], !probs[1]);
116 weights[2] = prob2weight( root, probs[3]);
117 weights[3] = prob2weight( root, !probs[3]);
118
119 let root = prob2weight(!probs[0], probs[4]);
120 weights[8] = prob2weight(!probs[0], !probs[4]);
121 let root1 = prob2weight( root, probs[5]);
122 let root2 = prob2weight( root, !probs[5]);
123 weights[4] = prob2weight( root1, probs[6]);
124 weights[5] = prob2weight( root1, !probs[6]);
125 weights[6] = prob2weight( root2, probs[7]);
126 weights[7] = prob2weight( root2, !probs[7]);
127
128 self.build(&weights);
129 }
130 fn build(&mut self, weights: &[u8]) {
131 let mut nodes = [Node::default(); MAX_HUFF_ELEMS * 2];
132 let mut nlen = 0;
133
134 for w in weights.iter().rev() {
135 let weight = u16::from(*w);
136 let mut pos = nlen;
137 for i in 0..nlen {
138 if nodes[i].weight > weight {
139 pos = i;
140 break;
141 }
142 }
143 for j in (pos..nlen).rev() {
144 nodes[j + 1] = nodes[j];
145 }
146 nodes[pos].weight = weight;
147 nodes[pos].sym = (weights.len() - nlen - 1) as i8;
148 nlen += 1;
149 }
150
151 let mut low = 0;
152 for _ in 0..nlen-1 {
153 let nnode = Node {
154 weight: nodes[low + 0].weight + nodes[low + 1].weight,
155 sym: -1,
156 ch0: low + 0,
157 ch1: low + 1,
158 };
159 low += 2;
160 let mut pos = low;
161 while (pos < nlen) && (nodes[pos].weight < nnode.weight) {
162 pos += 1;
163 }
164 for j in (pos..nlen).rev() {
165 nodes[j + 1] = nodes[j];
166 }
167 nodes[pos] = nnode;
168 nlen += 1;
169 }
170 self.get_codes(&nodes, nlen - 1, 0, 0);
171 for i in nlen..self.codes.len() {
172 self.codes[i] = self.codes[0];
173 self.bits[i] = self.bits[0];
174 }
175 }
176 fn get_codes(&mut self, nodes: &[Node], pos: usize, code: u16, len: u8) {
177 if nodes[pos].sym >= 0 {
178 self.codes[nodes[pos].sym as usize] = code;
179 self.bits [nodes[pos].sym as usize] = len;
180 } else {
181 self.get_codes(nodes, nodes[pos].ch0, (code << 1) | 0, len + 1);
182 self.get_codes(nodes, nodes[pos].ch1, (code << 1) | 1, len + 1);
183 }
184 }
185 }
186
187 pub trait ReadHuff {
188 fn read_huff(&mut self, huff: &VP6Huff) -> DecoderResult<u8>;
189 }
190
191 impl<'a> ReadHuff for BitReader<'a> {
192 fn read_huff(&mut self, huff: &VP6Huff) -> DecoderResult<u8> {
193 let peekval = self.peek(16);
194 for (i, (code, bit)) in huff.codes.iter().zip(huff.bits.iter()).enumerate() {
195 if (peekval >> (16 - *bit)) == u32::from(*code) {
196 self.skip(u32::from(*bit))?;
197 return Ok(i as u8);
198 }
199 }
200 Err(DecoderError::InvalidData)
201 }
202 }
203
204 #[derive(Clone,Copy,Default)]
205 pub struct VP6HuffModels {
206 pub dc_token_tree: [VP6Huff; 2],
207 pub ac_token_tree: [[[VP6Huff; 6]; 3]; 2],
208 pub zero_run_tree: [VP6Huff; 2],
209 }
210
211 impl VP6Models {
212 fn new() -> Self {
213 Self {
214 scan_order: [0; 64],
215 scan: [0; 64],
216 zigzag: [0; 64],
217 zero_run_probs: [[0; 14]; 2],
218 }
219 }
220 }
221
222 pub struct VP56Models {
223 pub mv_models: [VP56MVModel; 2],
224 pub mbtype_models: [[VP56MBTypeModel; 10]; 3],
225 pub coeff_models: [VP56CoeffModel; 2],
226 pub prob_xmitted: [[u8; 20]; 3],
227 pub vp6models: VP6Models,
228 pub vp6huff: VP6HuffModels,
229 }
230
231 impl VP56Models {
232 fn new() -> Self {
233 Self {
234 mv_models: [VP56MVModel::default(); 2],
235 mbtype_models: [[VP56MBTypeModel::default(); 10]; 3],
236 coeff_models: [VP56CoeffModel::default(); 2],
237 prob_xmitted: [[0; 20]; 3],
238 vp6models: VP6Models::new(),
239 vp6huff: VP6HuffModels::default(),
240 }
241 }
242 }
243
244 pub trait VP56Parser {
245 fn parse_header(&mut self, bc: &mut BoolCoder) -> DecoderResult<VP56Header>;
246 fn reset_models(&self, models: &mut VP56Models);
247 fn decode_mv(&self, bc: &mut BoolCoder, model: &VP56MVModel) -> i16;
248 fn decode_mv_models(&self, bc: &mut BoolCoder, models: &mut [VP56MVModel; 2]) -> DecoderResult<()>;
249 fn decode_coeff_models(&self, bc: &mut BoolCoder, models: &mut VP56Models, is_intra: bool) -> DecoderResult<()>;
250 fn decode_block(&self, bc: &mut BoolCoder, coeffs: &mut [i16; 64], model: &VP56CoeffModel, vp6model: &VP6Models, fstate: &mut FrameState) -> DecoderResult<()>;
251 fn decode_block_huff(&self, br: &mut BitReader, coeffs: &mut [i16; 64], vp6model: &VP6Models, model: &VP6HuffModels, fstate: &mut FrameState) -> DecoderResult<()>;
252 fn mc_block(&self, dst: &mut NASimpleVideoFrame<u8>, mc_buf: NAVideoBufferRef<u8>, src: NAVideoBufferRef<u8>, plane: usize, x: usize, y: usize, mv: MV, loop_thr: i16);
253 }
254
255 enum CoeffReader<'a> {
256 None,
257 Bool(BoolCoder<'a>),
258 Huff(BitReader<'a>),
259 }
260
261 #[derive(Clone,Copy,Default)]
262 struct MBInfo {
263 mb_type: VPMBType,
264 mv: MV,
265 }
266
267 pub struct FrameState {
268 pub mb_x: usize,
269 pub mb_y: usize,
270 pub plane: usize,
271 pub coeff_cat: [[u8; 64]; 4],
272 pub last_idx: [usize; 4],
273 pub top_ctx: u8,
274 pub ctx_idx: usize,
275 pub dc_quant: i16,
276 pub ac_quant: i16,
277 pub dc_zero_run: [usize; 2],
278 pub ac_zero_run: [usize; 2],
279 }
280
281 impl FrameState {
282 fn new() -> Self {
283 Self {
284 mb_x: 0,
285 mb_y: 0,
286 plane: 0,
287 coeff_cat: [[0; 64]; 4],
288 last_idx: [0; 4],
289 top_ctx: 0,
290 ctx_idx: 0,
291 dc_quant: 0,
292 ac_quant: 0,
293 dc_zero_run: [0; 2],
294 ac_zero_run: [0; 2],
295 }
296 }
297 }
298
299 #[derive(Default)]
300 pub struct VP56DCPred {
301 dc_y: Vec<i16>,
302 dc_u: Vec<i16>,
303 dc_v: Vec<i16>,
304 ldc_y: [i16; 2],
305 ldc_u: i16,
306 ldc_v: i16,
307 ref_y: Vec<u8>,
308 ref_c: Vec<u8>,
309 ref_left: u8,
310 y_idx: usize,
311 c_idx: usize,
312 }
313
314 const INVALID_REF: u8 = 42;
315
316 impl VP56DCPred {
317 fn new() -> Self { Self::default() }
318 fn resize(&mut self, mb_w: usize) {
319 self.dc_y.resize(mb_w * 2 + 2, 0);
320 self.dc_u.resize(mb_w + 2, 0);
321 self.dc_v.resize(mb_w + 2, 0);
322 self.ref_y.resize(mb_w * 2 + 2, INVALID_REF);
323 self.ref_c.resize(mb_w + 2, INVALID_REF);
324 self.ref_c[0] = 0;
325 }
326 fn reset(&mut self) {
327 self.update_row();
328 for el in self.ref_y.iter_mut().skip(1) { *el = INVALID_REF; }
329 for el in self.ref_c.iter_mut().skip(1) { *el = INVALID_REF; }
330 }
331 fn update_row(&mut self) {
332 self.y_idx = 1;
333 self.c_idx = 1;
334 self.ldc_y = [0; 2];
335 self.ldc_u = 0;
336 self.ldc_v = 0;
337 self.ref_left = INVALID_REF;
338 }
339 fn next_mb(&mut self) {
340 self.y_idx += 2;
341 self.c_idx += 1;
342 }
343 }
344
345 pub struct VP56Decoder {
346 version: u8,
347 has_alpha: bool,
348 flip: bool,
349 shuf: VPShuffler,
350 width: usize,
351 height: usize,
352 mb_w: usize,
353 mb_h: usize,
354 models: VP56Models,
355 amodels: VP56Models,
356 coeffs: [[i16; 64]; 6],
357 last_mbt: VPMBType,
358
359 loop_thr: i16,
360 ilace_prob: u8,
361 ilace_mb: bool,
362
363 mb_info: Vec<MBInfo>,
364 fstate: FrameState,
365 dc_pred: VP56DCPred,
366 last_dc: [[i16; 4]; 3],
367 top_ctx: [Vec<u8>; 4],
368
369 mc_buf: NAVideoBufferRef<u8>,
370 }
371
372 fn rescale_mb_mode_prob(prob: u32, total: u32) -> u8 {
373 (255 * prob / (1 + total)) as u8
374 }
375
376 fn map_mb_type(mbtype: VPMBType) -> usize {
377 match mbtype {
378 VPMBType::InterNoMV => 0,
379 VPMBType::Intra => 1,
380 VPMBType::InterMV => 2,
381 VPMBType::InterNearest => 3,
382 VPMBType::InterNear => 4,
383 VPMBType::GoldenNoMV => 5,
384 VPMBType::GoldenMV => 6,
385 VPMBType::InterFourMV => 7,
386 VPMBType::GoldenNearest => 8,
387 VPMBType::GoldenNear => 9,
388 }
389 }
390
391 pub fn expand_token_bc(bc: &mut BoolCoder, val_probs: &[u8; 11], token: u8, version: u8) -> i16 {
392 let mut sign = false;
393 let level;
394 if token < TOKEN_LARGE {
395 if token != 0 {
396 sign = bc.read_bool();
397 }
398 level = i16::from(token);
399 } else {
400 let cat: usize = vp_tree!(bc, val_probs[6],
401 vp_tree!(bc, val_probs[7], 0, 1),
402 vp_tree!(bc, val_probs[8],
403 vp_tree!(bc, val_probs[9], 2, 3),
404 vp_tree!(bc, val_probs[10], 4, 5)));
405 if version == 5 {
406 sign = bc.read_bool();
407 }
408 let mut add = 0i16;
409 let add_probs = &VP56_COEF_ADD_PROBS[cat];
410 for prob in add_probs.iter() {
411 if *prob == 128 { break; }
412 add = (add << 1) | (bc.read_prob(*prob) as i16);
413 }
414 if version != 5 {
415 sign = bc.read_bool();
416 }
417 level = VP56_COEF_BASE[cat] + add;
418 }
419 if !sign {
420 level
421 } else {
422 -level
423 }
424 }
425
426 impl VP56Decoder {
427 pub fn new(version: u8, has_alpha: bool, flip: bool) -> Self {
428 let vt = alloc_video_buffer(NAVideoInfo::new(24, 24, false, VP_YUVA420_FORMAT), 4).unwrap();
429 let mc_buf = vt.get_vbuf().unwrap();
430 Self {
431 version, has_alpha, flip,
432 shuf: VPShuffler::new(),
433 width: 0,
434 height: 0,
435 mb_w: 0,
436 mb_h: 0,
437 models: VP56Models::new(),
438 amodels: VP56Models::new(),
439 coeffs: [[0; 64]; 6],
440 last_mbt: VPMBType::InterNoMV,
441
442 loop_thr: 0,
443 ilace_prob: 0,
444 ilace_mb: false,
445
446 mb_info: Vec::new(),
447 fstate: FrameState::new(),
448 dc_pred: VP56DCPred::new(),
449 last_dc: [[0; 4]; 3],
450 top_ctx: [Vec::new(), Vec::new(), Vec::new(), Vec::new()],
451
452 mc_buf,
453 }
454 }
455 fn set_dimensions(&mut self, width: usize, height: usize) {
456 self.width = width;
457 self.height = height;
458 self.mb_w = (self.width + 15) >> 4;
459 self.mb_h = (self.height + 15) >> 4;
460 self.mb_info.resize(self.mb_w * self.mb_h, MBInfo::default());
461 self.top_ctx = [vec![0; self.mb_w * 2], vec![0; self.mb_w], vec![0; self.mb_w], vec![0; self.mb_w * 2]];
462 }
463 pub fn init(&mut self, supp: &mut NADecoderSupport, vinfo: NAVideoInfo) -> DecoderResult<()> {
464 supp.pool_u8.set_dec_bufs(3);
465 supp.pool_u8.prealloc_video(NAVideoInfo::new(vinfo.get_width(), vinfo.get_height(), false, vinfo.get_format()), 4)?;
466 self.set_dimensions(vinfo.get_width(), vinfo.get_height());
467 self.dc_pred.resize(self.mb_w);
468 Ok(())
469 }
470 pub fn flush(&mut self) {
471 self.shuf.clear();
472 }
473 pub fn decode_frame(&mut self, supp: &mut NADecoderSupport, src: &[u8], br: &mut dyn VP56Parser) -> DecoderResult<(NABufferType, FrameType)> {
474 let aoffset;
475 let mut bc;
476 if self.has_alpha {
477 validate!(src.len() >= 7);
478 aoffset = ((src[0] as usize) << 16) | ((src[1] as usize) << 8) | (src[2] as usize);
479 validate!((aoffset > 0) && (aoffset < src.len() - 3));
480 bc = BoolCoder::new(&src[3..])?;
481 } else {
482 validate!(src.len() >= 4);
483 aoffset = src.len();
484 bc = BoolCoder::new(src)?;
485 }
486 let hdr = br.parse_header(&mut bc)?;
487 validate!((hdr.offset as usize) < aoffset); //XXX: take alpha 3 byte offset into account?
488
489 if hdr.mb_w != 0 {
490 self.set_dimensions((hdr.mb_w as usize) * 16, (hdr.mb_h as usize) * 16);
491 }
492 let fmt = if !self.has_alpha {
493 YUV420_FORMAT
494 } else {
495 VP_YUVA420_FORMAT
496 };
497 let vinfo = NAVideoInfo::new(self.width, self.height, self.flip, fmt);
498 let ret = supp.pool_u8.get_free();
499 if ret.is_none() {
500 return Err(DecoderError::AllocError);
501 }
502 let mut buf = ret.unwrap();
503 if buf.get_info() != vinfo {
504 self.shuf.clear();
505 supp.pool_u8.reset();
506 supp.pool_u8.prealloc_video(vinfo, 4)?;
507 let ret = supp.pool_u8.get_free();
508 if ret.is_none() {
509 return Err(DecoderError::AllocError);
510 }
511 buf = ret.unwrap();
512 }
513 let mut dframe = NASimpleVideoFrame::from_video_buf(&mut buf).unwrap();
514
515 if hdr.is_intra {
516 self.shuf.clear();
517 } else {
518 if !self.shuf.has_refs() {
519 return Err(DecoderError::MissingReference);
520 }
521 }
522
523 let psrc = &src[if self.has_alpha { 3 } else { 0 }..aoffset];
524 self.decode_planes(br, &mut dframe, &mut bc, &hdr, psrc, false)?;
525
526 if self.has_alpha {
527 let asrc = &src[aoffset + 3..];
528 let mut bc = BoolCoder::new(asrc)?;
529 let ahdr = br.parse_header(&mut bc)?;
530 validate!(ahdr.mb_w == hdr.mb_w && ahdr.mb_h == hdr.mb_h);
531 std::mem::swap(&mut self.models, &mut self.amodels);
532 let ret = self.decode_planes(br, &mut dframe, &mut bc, &ahdr, asrc, true);
533 std::mem::swap(&mut self.models, &mut self.amodels);
534 if let Err(err) = ret {
535 return Err(err);
536 }
537 }
538
539 if hdr.is_golden {
540 self.shuf.add_golden_frame(buf.clone());
541 }
542 self.shuf.add_frame(buf.clone());
543
544 Ok((NABufferType::Video(buf), if hdr.is_intra { FrameType::I } else { FrameType::P }))
545 }
546 fn decode_planes(&mut self, br: &mut dyn VP56Parser, dframe: &mut NASimpleVideoFrame<u8>, bc: &mut BoolCoder, hdr: &VP56Header, src: &[u8], alpha: bool) -> DecoderResult<()> {
547 let mut cr;
548 if hdr.multistream {
549 let off = hdr.offset as usize;
550 if !hdr.use_huffman {
551 let bc2 = BoolCoder::new(&src[off..])?;
552 cr = CoeffReader::Bool(bc2);
553 } else {
554 let br = BitReader::new(&src[off..], BitReaderMode::BE);
555 cr = CoeffReader::Huff(br);
556 }
557 } else {
558 cr = CoeffReader::None;
559 }
560
561 if hdr.is_intra {
562 br.reset_models(&mut self.models);
563 self.reset_mbtype_models();
564 } else {
565 self.decode_mode_prob_models(bc)?;
566 br.decode_mv_models(bc, &mut self.models.mv_models)?;
567 }
568 br.decode_coeff_models(bc, &mut self.models, hdr.is_intra)?;
569 if hdr.use_huffman {
570 for i in 0..2 {
571 self.models.vp6huff.dc_token_tree[i].build_codes(&self.models.coeff_models[i].dc_value_probs);
572 }
573 for i in 0..2 {
574 for mode in 0..3 {
575 for band in 0..6 {
576 self.models.vp6huff.ac_token_tree[i][mode][band].build_codes(&self.models.coeff_models[i].ac_val_probs[mode][band]);
577 }
578 }
579 }
580 for i in 0..2 {
581 self.models.vp6huff.zero_run_tree[i].build_codes_zero_run(&self.models.vp6models.zero_run_probs[i]);
582 }
583 }
584
585 if hdr.interlaced {
586 self.ilace_prob = bc.read_bits(8) as u8;
587 }
588
589 self.fstate = FrameState::new();
590 self.fstate.dc_quant = VP56_DC_QUANTS[hdr.quant as usize] * 4;
591 self.fstate.ac_quant = VP56_AC_QUANTS[hdr.quant as usize] * 4;
592 self.loop_thr = i16::from(VP56_FILTER_LIMITS[hdr.quant as usize]);
593
594 self.last_mbt = VPMBType::InterNoMV;
595 for vec in self.top_ctx.iter_mut() {
596 for el in vec.iter_mut() {
597 *el = 0;
598 }
599 }
600 self.last_dc = [[0; 4]; 3];
601 self.last_dc[0][1] = 0x80;
602 self.last_dc[0][2] = 0x80;
603 self.dc_pred.reset();
604
605 self.ilace_mb = false;
606 for mb_y in 0..self.mb_h {
607 self.fstate.mb_y = mb_y;
608 self.fstate.coeff_cat = [[0; 64]; 4];
609 self.fstate.last_idx = [24; 4];
610 for mb_x in 0..self.mb_w {
611 self.fstate.mb_x = mb_x;
612 self.decode_mb(dframe, bc, &mut cr, br, &hdr, alpha)?;
613 self.dc_pred.next_mb();
614 }
615 self.dc_pred.update_row();
616 }
617 Ok(())
618 }
619 fn reset_mbtype_models(&mut self) {
620 const DEFAULT_XMITTED_PROBS: [[u8; 20]; 3] = [
621 [ 42, 69, 2, 1, 7, 1, 42, 44, 22, 6, 3, 1, 2, 0, 5, 1, 1, 0, 0, 0 ],
622 [ 8, 229, 1, 1, 8, 0, 0, 0, 0, 0, 2, 1, 1, 0, 0, 0, 1, 1, 0, 0 ],
623 [ 35, 122, 1, 1, 6, 1, 34, 46, 0, 0, 2, 1, 1, 0, 1, 0, 1, 1, 0, 0 ]
624 ];
625 self.models.prob_xmitted.copy_from_slice(&DEFAULT_XMITTED_PROBS);
626 }
627 fn decode_mode_prob_models(&mut self, bc: &mut BoolCoder) -> DecoderResult<()> {
628 for ctx in 0..3 {
629 if bc.read_prob(174) {
630 let idx = bc.read_bits(4) as usize;
631 for i in 0..20 {
632 self.models.prob_xmitted[ctx][i ^ 1] = VP56_MODE_VQ[ctx][idx][i];
633 }
634 }
635 if bc.read_prob(254) {
636 for set in 0..20 {
637 if bc.read_prob(205) {
638 let sign = bc.read_bool();
639 let diff = vp_tree!(bc, 171,
640 vp_tree!(bc, 83, 2, 1),
641 vp_tree!(bc, 199,
642 vp_tree!(bc, 140,
643 vp_tree!(bc, 125,
644 vp_tree!(bc, 104, 6, 5),
645 4
646 ),
647 3
648 ),
649 bc.read_bits(7)
650 )) * 4;
651 validate!(diff < 256);
652 let diff = diff as u8;
653 if !sign {
654 validate!(self.models.prob_xmitted[ctx][set ^ 1] <= 255 - diff);
655 self.models.prob_xmitted[ctx][set ^ 1] += diff;
656 } else {
657 validate!(self.models.prob_xmitted[ctx][set ^ 1] >= diff);
658 self.models.prob_xmitted[ctx][set ^ 1] -= diff;
659 }
660 }
661 }
662 }
663 }
664 for ctx in 0..3 {
665 let prob_xmitted = &self.models.prob_xmitted[ctx];
666 for mode in 0..10 {
667 let mdl = &mut self.models.mbtype_models[ctx][mode];
668 let mut cnt = [0u32; 10];
669 let mut total = 0;
670 for i in 0..10 {
671 if i == mode { continue; }
672 cnt[i] = 100 * u32::from(prob_xmitted[i * 2]);
673 total += cnt[i];
674 }
675 let sum = u32::from(prob_xmitted[mode * 2]) + u32::from(prob_xmitted[mode * 2 + 1]);
676 mdl.probs[9] = 255 - rescale_mb_mode_prob(u32::from(prob_xmitted[mode * 2 + 1]), sum);
677
678 let inter_mv0_weight = (cnt[0] as u32) + (cnt[2] as u32);
679 let inter_mv1_weight = (cnt[3] as u32) + (cnt[4] as u32);
680 let gold_mv0_weight = (cnt[5] as u32) + (cnt[6] as u32);
681 let gold_mv1_weight = (cnt[8] as u32) + (cnt[9] as u32);
682 let mix_weight = (cnt[1] as u32) + (cnt[7] as u32);
683 mdl.probs[0] = 1 + rescale_mb_mode_prob(inter_mv0_weight + inter_mv1_weight, total);
684 mdl.probs[1] = 1 + rescale_mb_mode_prob(inter_mv0_weight, inter_mv0_weight + inter_mv1_weight);
685 mdl.probs[2] = 1 + rescale_mb_mode_prob(mix_weight, mix_weight + gold_mv0_weight + gold_mv1_weight);
686 mdl.probs[3] = 1 + rescale_mb_mode_prob(cnt[0] as u32, inter_mv0_weight);
687 mdl.probs[4] = 1 + rescale_mb_mode_prob(cnt[3] as u32, inter_mv1_weight);
688 mdl.probs[5] = 1 + rescale_mb_mode_prob(cnt[1], mix_weight);
689 mdl.probs[6] = 1 + rescale_mb_mode_prob(gold_mv0_weight, gold_mv0_weight + gold_mv1_weight);
690 mdl.probs[7] = 1 + rescale_mb_mode_prob(cnt[5], gold_mv0_weight);
691 mdl.probs[8] = 1 + rescale_mb_mode_prob(cnt[8], gold_mv1_weight);
692 }
693 }
694 Ok(())
695 }
696 fn find_mv_pred(&self, ref_id: u8) -> (usize, MV, MV, MV) {
697 const CAND_POS: [(i8, i8); 12] = [
698 (-1, 0), ( 0, -1),
699 (-1, -1), (-1, 1),
700 (-2, 0), ( 0, -2),
701 (-1, -2), (-2, -1),
702 (-2, 1), (-1, 2),
703 (-2, -2), (-2, 2)
704 ];
705
706 let mut nearest_mv = ZERO_MV;
707 let mut near_mv = ZERO_MV;
708 let mut pred_mv = ZERO_MV;
709 let mut num_mv: usize = 0;
710
711 for (i, (yoff, xoff)) in CAND_POS.iter().enumerate() {
712 let cx = (self.fstate.mb_x as isize) + (*xoff as isize);
713 let cy = (self.fstate.mb_y as isize) + (*yoff as isize);
714 if (cx < 0) || (cy < 0) {
715 continue;
716 }
717 let cx = cx as usize;
718 let cy = cy as usize;
719 if (cx >= self.mb_w) || (cy >= self.mb_h) {
720 continue;
721 }
722 let mb_pos = cx + cy * self.mb_w;
723 let mv = self.mb_info[mb_pos].mv;
724 if (self.mb_info[mb_pos].mb_type.get_ref_id() != ref_id) || (mv == ZERO_MV) {
725 continue;
726 }
727 if num_mv == 0 {
728 nearest_mv = mv;
729 num_mv += 1;
730 if (self.version > 5) && (i < 2) {
731 pred_mv = mv;
732 }
733 } else if mv != nearest_mv {
734 near_mv = mv;
735 num_mv += 1;
736 break;
737 }
738 }
739
740 (num_mv, nearest_mv, near_mv, pred_mv)
741 }
742 fn decode_mv(&self, bc: &mut BoolCoder, br: &mut dyn VP56Parser) -> MV {
743 let x = br.decode_mv(bc, &self.models.mv_models[0]);
744 let y = br.decode_mv(bc, &self.models.mv_models[1]);
745 MV{ x, y }
746 }
747 fn decode_mb_type(&mut self, bc: &mut BoolCoder, ctx: usize) -> DecoderResult<VPMBType> {
748 let probs = &self.models.mbtype_models[ctx][map_mb_type(self.last_mbt)].probs;
749 if !bc.read_prob(probs[9]) {
750 self.last_mbt = vp_tree!(
751 bc, probs[0],
752 vp_tree!(bc, probs[1],
753 vp_tree!(bc, probs[3], VPMBType::InterNoMV, VPMBType::InterMV),
754 vp_tree!(bc, probs[4], VPMBType::InterNearest, VPMBType::InterNear)
755 ),
756 vp_tree!(bc, probs[2],
757 vp_tree!(bc, probs[5], VPMBType::Intra, VPMBType::InterFourMV),
758 vp_tree!(bc, probs[6],
759 vp_tree!(bc, probs[7], VPMBType::GoldenNoMV, VPMBType::GoldenMV),
760 vp_tree!(bc, probs[8], VPMBType::GoldenNearest, VPMBType::GoldenNear)
761 )
762 )
763 );
764 }
765 Ok(self.last_mbt)
766 }
767 #[allow(clippy::cognitive_complexity)]
768 fn decode_mb(&mut self, frm: &mut NASimpleVideoFrame<u8>, bc: &mut BoolCoder, cr: &mut CoeffReader, br: &mut dyn VP56Parser, hdr: &VP56Header, alpha: bool) -> DecoderResult<()> {
769 const FOURMV_SUB_TYPE: [VPMBType; 4] = [ VPMBType::InterNoMV, VPMBType::InterMV, VPMBType::InterNearest, VPMBType::InterNear ];
770
771 let mb_x = self.fstate.mb_x;
772 let mb_y = self.fstate.mb_y;
773 self.coeffs = [[0; 64]; 6];
774 let mb_pos = mb_x + mb_y * self.mb_w;
775 let mut four_mv = [ZERO_MV; 4];
776 let mut four_mbt = [VPMBType::Intra; 4];
777
778 if hdr.interlaced {
779 let iprob = self.ilace_prob;
780 let prob = if mb_x == 0 {
781 iprob
782 } else if !self.ilace_mb {
783 iprob + (((256 - u16::from(iprob)) >> 1) as u8)
784 } else {
785 iprob - (iprob >> 1)
786 };
787 self.ilace_mb = bc.read_prob(prob);
788 }
789
790 let (num_mv, nearest_mv, near_mv, pred_mv) = if hdr.is_intra {
791 (0, ZERO_MV, ZERO_MV, ZERO_MV)
792 } else { self.find_mv_pred(VP_REF_INTER) };
793 let mb_type = if hdr.is_intra {
794 VPMBType::Intra
795 } else {
796 self.decode_mb_type(bc, (num_mv + 1) % 3)?
797 };
798 self.mb_info[mb_pos].mb_type = mb_type;
799 if mb_type.get_ref_id() != VP_REF_GOLDEN {
800 match mb_type {
801 VPMBType::Intra |
802 VPMBType::InterNoMV => {
803 self.mb_info[mb_pos].mv = ZERO_MV;
804 },
805 VPMBType::InterMV => {
806 let diff_mv = self.decode_mv(bc, br);
807 self.mb_info[mb_pos].mv = pred_mv + diff_mv;
808 },
809 VPMBType::InterNearest => {
810 self.mb_info[mb_pos].mv = nearest_mv;
811 },
812 VPMBType::InterNear => {
813 self.mb_info[mb_pos].mv = near_mv;
814 },
815 VPMBType::InterFourMV => {
816 for i in 0..4 {
817 four_mbt[i] = FOURMV_SUB_TYPE[bc.read_bits(2) as usize];
818 }
819 for i in 0..4 {
820 match four_mbt[i] {
821 VPMBType::InterNoMV => {},
822 VPMBType::InterMV => {
823 let diff_mv = self.decode_mv(bc, br);
824 four_mv[i] = pred_mv + diff_mv;
825 },
826 VPMBType::InterNearest => {
827 four_mv[i] = nearest_mv;
828 },
829 VPMBType::InterNear => {
830 four_mv[i] = near_mv;
831 },
832 _ => unreachable!(),
833 };
834 }
835 self.mb_info[mb_pos].mv = four_mv[3];
836 },
837 _ => unreachable!(),
838 };
839 } else {
840 let (_num_mv, nearest_mv, near_mv, pred_mv) = self.find_mv_pred(VP_REF_GOLDEN);
841 match mb_type {
842 VPMBType::GoldenNoMV => {
843 self.mb_info[mb_pos].mv = ZERO_MV;
844 },
845 VPMBType::GoldenMV => {
846 let diff_mv = self.decode_mv(bc, br);
847 self.mb_info[mb_pos].mv = pred_mv + diff_mv;
848 },
849 VPMBType::GoldenNearest => {
850 self.mb_info[mb_pos].mv = nearest_mv;
851 },
852 VPMBType::GoldenNear => {
853 self.mb_info[mb_pos].mv = near_mv;
854 },
855 _ => unreachable!(),
856 };
857 }
858 if !mb_type.is_intra() && (mb_type != VPMBType::InterFourMV) {
859 self.do_mc(br, frm, mb_type, self.mb_info[mb_pos].mv, alpha);
860 } else if mb_type == VPMBType::InterFourMV {
861 self.do_fourmv(br, frm, &four_mv, alpha);
862 }
863
864 for blk_no in 0..4 {
865 self.fstate.plane = if !alpha { 0 } else { 3 };
866 self.fstate.ctx_idx = blk_no >> 1;
867 self.fstate.top_ctx = self.top_ctx[self.fstate.plane][mb_x * 2 + (blk_no & 1)];
868 match cr {
869 CoeffReader::None => {
870 br.decode_block(bc, &mut self.coeffs[blk_no], &self.models.coeff_models[0], &self.models.vp6models, &mut self.fstate)?;
871 },
872 CoeffReader::Bool(ref mut bcc) => {
873 br.decode_block(bcc, &mut self.coeffs[blk_no], &self.models.coeff_models[0], &self.models.vp6models, &mut self.fstate)?;
874 },
875 CoeffReader::Huff(ref mut brc) => {
876 br.decode_block_huff(brc, &mut self.coeffs[blk_no], &self.models.vp6models, &self.models.vp6huff, &mut self.fstate)?;
877 },
878 };
879 self.top_ctx[self.fstate.plane][mb_x * 2 + (blk_no & 1)] = self.fstate.top_ctx;
880 self.predict_dc(mb_type, mb_pos, blk_no, alpha);
881
882 let bx = mb_x * 2 + (blk_no & 1);
883 let by = mb_y * 2 + (blk_no >> 1);
884 let has_ac = self.fstate.last_idx[self.fstate.ctx_idx] > 0;
885 if mb_type.is_intra() {
886 if !self.ilace_mb {
887 if has_ac {
888 vp_put_block(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
889 } else {
890 vp_put_block_dc(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
891 }
892 } else {
893 vp_put_block_ilace(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
894 }
895 } else {
896 if !self.ilace_mb {
897 if has_ac {
898 vp_add_block(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
899 } else {
900 vp_add_block_dc(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
901 }
902 } else {
903 vp_add_block_ilace(&mut self.coeffs[blk_no], bx, by, self.fstate.plane, frm);
904 }
905 }
906 }
907 for blk_no in 4..6 {
908 self.fstate.plane = blk_no - 3;
909 self.fstate.ctx_idx = blk_no - 2;
910 self.fstate.top_ctx = self.top_ctx[self.fstate.plane][mb_x];
911 match cr {
912 CoeffReader::None => {
913 br.decode_block(bc, &mut self.coeffs[blk_no], &self.models.coeff_models[1], &self.models.vp6models, &mut self.fstate)?;
914 },
915 CoeffReader::Bool(ref mut bcc) => {
916 br.decode_block(bcc, &mut self.coeffs[blk_no], &self.models.coeff_models[1], &self.models.vp6models, &mut self.fstate)?;
917 },
918 CoeffReader::Huff(ref mut brc) => {
919 br.decode_block_huff(brc, &mut self.coeffs[blk_no], &self.models.vp6models, &self.models.vp6huff, &mut self.fstate)?;
920 },
921 };
922 self.top_ctx[self.fstate.plane][mb_x] = self.fstate.top_ctx;
923 self.predict_dc(mb_type, mb_pos, blk_no, alpha);
924 if !alpha {
925 let has_ac = self.fstate.last_idx[self.fstate.ctx_idx] > 0;
926 if mb_type.is_intra() {
927 if has_ac {
928 vp_put_block(&mut self.coeffs[blk_no], mb_x, mb_y, self.fstate.plane, frm);
929 } else {
930 vp_put_block_dc(&mut self.coeffs[blk_no], mb_x, mb_y, self.fstate.plane, frm);
931 }
932 } else {
933 if has_ac {
934 vp_add_block(&mut self.coeffs[blk_no], mb_x, mb_y, self.fstate.plane, frm);
935 } else {
936 vp_add_block_dc(&mut self.coeffs[blk_no], mb_x, mb_y, self.fstate.plane, frm);
937 }
938 }
939 }
940 }
941 Ok(())
942 }
943 fn do_mc(&mut self, br: &dyn VP56Parser, frm: &mut NASimpleVideoFrame<u8>, mb_type: VPMBType, mv: MV, alpha: bool) {
944 let x = self.fstate.mb_x * 16;
945 let y = self.fstate.mb_y * 16;
946 let plane = if !alpha { 0 } else { 3 };
947 let src = if mb_type.get_ref_id() == VP_REF_INTER {
948 self.shuf.get_last().unwrap()
949 } else {
950 self.shuf.get_golden().unwrap()
951 };
952
953 br.mc_block(frm, self.mc_buf.clone(), src.clone(), plane, x + 0, y + 0, mv, self.loop_thr);
954 br.mc_block(frm, self.mc_buf.clone(), src.clone(), plane, x + 8, y + 0, mv, self.loop_thr);
955 br.mc_block(frm, self.mc_buf.clone(), src.clone(), plane, x + 0, y + 8, mv, self.loop_thr);
956 br.mc_block(frm, self.mc_buf.clone(), src.clone(), plane, x + 8, y + 8, mv, self.loop_thr);
957 if !alpha {
958 let x = self.fstate.mb_x * 8;
959 let y = self.fstate.mb_y * 8;
960 br.mc_block(frm, self.mc_buf.clone(), src.clone(), 1, x, y, mv, self.loop_thr);
961 br.mc_block(frm, self.mc_buf.clone(), src, 2, x, y, mv, self.loop_thr);
962 }
963 }
964 fn do_fourmv(&mut self, br: &dyn VP56Parser, frm: &mut NASimpleVideoFrame<u8>, mvs: &[MV; 4], alpha: bool) {
965 let x = self.fstate.mb_x * 16;
966 let y = self.fstate.mb_y * 16;
967 let plane = if !alpha { 0 } else { 3 };
968 let src = self.shuf.get_last().unwrap();
969 for blk_no in 0..4 {
970 br.mc_block(frm, self.mc_buf.clone(), src.clone(),
971 plane, x + (blk_no & 1) * 8, y + (blk_no & 2) * 4,
972 mvs[blk_no], self.loop_thr);
973 }
974 if !alpha {
975 let x = self.fstate.mb_x * 8;
976 let y = self.fstate.mb_y * 8;
977 let sum = mvs[0] + mvs[1] + mvs[2] + mvs[3];
978 let mv = MV { x: sum.x / 4, y: sum.y / 4 };
979 br.mc_block(frm, self.mc_buf.clone(), src.clone(), 1, x, y, mv, self.loop_thr);
980 br.mc_block(frm, self.mc_buf.clone(), src, 2, x, y, mv, self.loop_thr);
981 }
982 }
983 fn predict_dc(&mut self, mb_type: VPMBType, _mb_pos: usize, blk_no: usize, _alpha: bool) {
984 let is_luma = blk_no < 4;
985 let (plane, dcs) = match blk_no {
986 4 => (1, &mut self.dc_pred.dc_u),
987 5 => (2, &mut self.dc_pred.dc_v),
988 _ => (0, &mut self.dc_pred.dc_y),
989 };
990 let (dc_ref, dc_idx) = if is_luma {
991 (&mut self.dc_pred.ref_y, self.dc_pred.y_idx + (blk_no & 1))
992 } else {
993 (&mut self.dc_pred.ref_c, self.dc_pred.c_idx)
994 };
995 let ref_id = mb_type.get_ref_id();
996 let mut dc_pred = 0;
997 let mut count = 0;
998 let has_left_blk = is_luma && ((blk_no & 1) == 1);
999 if has_left_blk || self.dc_pred.ref_left == ref_id {
1000 dc_pred += match blk_no {
1001 0 | 1 => self.dc_pred.ldc_y[0],
1002 2 | 3 => self.dc_pred.ldc_y[1],
1003 4 => self.dc_pred.ldc_u,
1004 _ => self.dc_pred.ldc_v,
1005 };
1006 count += 1;
1007 }
1008 if dc_ref[dc_idx] == ref_id {
1009 dc_pred += dcs[dc_idx];
1010 count += 1;
1011 }
1012 if self.version == 5 {
1013 if (count < 2) && (dc_ref[dc_idx - 1] == ref_id) {
1014 dc_pred += dcs[dc_idx - 1];
1015 count += 1;
1016 }
1017 if (count < 2) && (dc_ref[dc_idx + 1] == ref_id) {
1018 dc_pred += dcs[dc_idx + 1];
1019 count += 1;
1020 }
1021 }
1022 if count == 0 {
1023 dc_pred = self.last_dc[ref_id as usize][plane];
1024 } else if count == 2 {
1025 dc_pred /= 2;
1026 }
1027 self.coeffs[blk_no][0] += dc_pred;
1028
1029 let dc = self.coeffs[blk_no][0];
1030 if blk_no != 4 { // update top block reference only for the second chroma component
1031 dc_ref[dc_idx] = ref_id;
1032 }
1033 match blk_no {
1034 0 | 1 => {
1035 self.dc_pred.ldc_y[0] = dc;
1036 },
1037 2 | 3 => {
1038 self.dc_pred.ldc_y[1] = dc;
1039 },
1040 4 => {
1041 self.dc_pred.ldc_u = dc;
1042 },
1043 _ => {
1044 self.dc_pred.ldc_v = dc;
1045 self.dc_pred.ref_left = ref_id;
1046 },
1047 };
1048 dcs[dc_idx] = dc;
1049
1050 self.last_dc[ref_id as usize][plane] = dc;
1051 self.coeffs[blk_no][0] = self.coeffs[blk_no][0].wrapping_mul(self.fstate.dc_quant);
1052 }
1053 }
1054
1055 const VP56_DC_QUANTS: [i16; 64] = [
1056 47, 47, 47, 47, 45, 43, 43, 43,
1057 43, 43, 42, 41, 41, 40, 40, 40,
1058 40, 35, 35, 35, 35, 33, 33, 33,
1059 33, 32, 32, 32, 27, 27, 26, 26,
1060 25, 25, 24, 24, 23, 23, 19, 19,
1061 19, 19, 18, 18, 17, 16, 16, 16,
1062 16, 16, 15, 11, 11, 11, 10, 10,
1063 9, 8, 7, 5, 3, 3, 2, 2
1064 ];
1065 const VP56_AC_QUANTS: [i16; 64] = [
1066 94, 92, 90, 88, 86, 82, 78, 74,
1067 70, 66, 62, 58, 54, 53, 52, 51,
1068 50, 49, 48, 47, 46, 45, 44, 43,
1069 42, 40, 39, 37, 36, 35, 34, 33,
1070 32, 31, 30, 29, 28, 27, 26, 25,
1071 24, 23, 22, 21, 20, 19, 18, 17,
1072 16, 15, 14, 13, 12, 11, 10, 9,
1073 8, 7, 6, 5, 4, 3, 2, 1
1074 ];
1075
1076 const VP56_FILTER_LIMITS: [u8; 64] = [
1077 14, 14, 13, 13, 12, 12, 10, 10,
1078 10, 10, 8, 8, 8, 8, 8, 8,
1079 8, 8, 8, 8, 8, 8, 8, 8,
1080 8, 8, 8, 8, 8, 8, 8, 8,
1081 8, 8, 8, 8, 7, 7, 7, 7,
1082 7, 7, 6, 6, 6, 6, 6, 6,
1083 5, 5, 5, 5, 4, 4, 4, 4,
1084 4, 4, 4, 3, 3, 3, 3, 2
1085 ];
1086
1087 const VP56_MODE_VQ: [[[u8; 20]; 16]; 3] = [
1088 [
1089 [ 9, 15, 32, 25, 7, 19, 9, 21, 1, 12, 14, 12, 3, 18, 14, 23, 3, 10, 0, 4 ],
1090 [ 48, 39, 1, 2, 11, 27, 29, 44, 7, 27, 1, 4, 0, 3, 1, 6, 1, 2, 0, 0 ],
1091 [ 21, 32, 1, 2, 4, 10, 32, 43, 6, 23, 2, 3, 1, 19, 1, 6, 12, 21, 0, 7 ],
1092 [ 69, 83, 0, 0, 0, 2, 10, 29, 3, 12, 0, 1, 0, 3, 0, 3, 2, 2, 0, 0 ],
1093 [ 11, 20, 1, 4, 18, 36, 43, 48, 13, 35, 0, 2, 0, 5, 3, 12, 1, 2, 0, 0 ],
1094 [ 70, 44, 0, 1, 2, 10, 37, 46, 8, 26, 0, 2, 0, 2, 0, 2, 0, 1, 0, 0 ],
1095 [ 8, 15, 0, 1, 8, 21, 74, 53, 22, 42, 0, 1, 0, 2, 0, 3, 1, 2, 0, 0 ],
1096 [ 141, 42, 0, 0, 1, 4, 11, 24, 1, 11, 0, 1, 0, 1, 0, 2, 0, 0, 0, 0 ],
1097 [ 8, 19, 4, 10, 24, 45, 21, 37, 9, 29, 0, 3, 1, 7, 11, 25, 0, 2, 0, 1 ],
1098 [ 46, 42, 0, 1, 2, 10, 54, 51, 10, 30, 0, 2, 0, 2, 0, 1, 0, 1, 0, 0 ],
1099 [ 28, 32, 0, 0, 3, 10, 75, 51, 14, 33, 0, 1, 0, 2, 0, 1, 1, 2, 0, 0 ],
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1139 ]
1140 ];
1141
NihAV is a research multimedia framework