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Commit | Line | Data |
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1 | use io::bitreader::*; | |
2 | use io::codebook::*; | |
3 | use formats; | |
4 | use super::super::*; | |
5 | use super::*; | |
6 | use super::decoder::*; | |
7 | use super::data::*; | |
8 | use super::code::H263BlockDSP; | |
9 | ||
10 | #[allow(dead_code)] | |
11 | struct Tables { | |
12 | intra_mcbpc_cb: Codebook<u8>, | |
13 | inter_mcbpc_cb: Codebook<u8>, | |
14 | cbpy_cb: Codebook<u8>, | |
15 | rl_cb: Codebook<H263RLSym>, | |
16 | aic_rl_cb: Codebook<H263RLSym>, | |
17 | mv_cb: Codebook<u8>, | |
18 | } | |
19 | ||
20 | struct Intel263Decoder { | |
21 | info: Rc<NACodecInfo>, | |
22 | dec: H263BaseDecoder, | |
23 | tables: Tables, | |
24 | bdsp: H263BlockDSP, | |
25 | } | |
26 | ||
27 | struct Intel263BR<'a> { | |
28 | br: BitReader<'a>, | |
29 | tables: &'a Tables, | |
30 | gob_no: usize, | |
31 | mb_w: usize, | |
32 | is_pb: bool, | |
33 | } | |
34 | ||
35 | fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> { | |
36 | let mark = br.read(1)?; | |
37 | validate!(mark == 1); | |
38 | Ok(()) | |
39 | } | |
40 | ||
41 | impl<'a> Intel263BR<'a> { | |
42 | fn new(src: &'a [u8], tables: &'a Tables) -> Self { | |
43 | Intel263BR { | |
44 | br: BitReader::new(src, src.len(), BitReaderMode::BE), | |
45 | tables: tables, | |
46 | gob_no: 0, | |
47 | mb_w: 0, | |
48 | is_pb: false, | |
49 | } | |
50 | } | |
51 | ||
52 | fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { | |
53 | let mut br = &mut self.br; | |
54 | let mut idx = 0; | |
55 | if intra { | |
56 | let mut dc = br.read(8)?; | |
57 | if dc == 255 { dc = 128; } | |
58 | blk[0] = (dc as i16) << 3; | |
59 | idx = 1; | |
60 | } | |
61 | if !coded { return Ok(()); } | |
62 | ||
63 | let rl_cb = &self.tables.rl_cb; // could be aic too | |
64 | let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 }; | |
65 | let q = (quant * 2) as i16; | |
66 | while idx < 64 { | |
67 | let code = br.read_cb(rl_cb)?; | |
68 | let run; | |
69 | let mut level; | |
70 | let last; | |
71 | if !code.is_escape() { | |
72 | run = code.get_run(); | |
73 | level = code.get_level(); | |
74 | last = code.is_last(); | |
75 | if br.read_bool()? { level = -level; } | |
76 | level = (level * q) + q_add; | |
77 | } else { | |
78 | last = br.read_bool()?; | |
79 | run = br.read(6)? as u8; | |
80 | level = br.read_s(8)? as i16; | |
81 | if level == -128 { | |
82 | let low = br.read(5)? as i16; | |
83 | let top = br.read_s(6)? as i16; | |
84 | level = (top << 5) | low; | |
85 | } | |
86 | level = (level * q) + q_add; | |
87 | if level < -2048 { level = -2048; } | |
88 | if level > 2047 { level = 2047; } | |
89 | } | |
90 | idx += run; | |
91 | validate!(idx < 64); | |
92 | let oidx = H263_ZIGZAG[idx as usize]; | |
93 | blk[oidx] = level; | |
94 | idx += 1; | |
95 | if last { break; } | |
96 | } | |
97 | Ok(()) | |
98 | } | |
99 | } | |
100 | ||
101 | fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> { | |
102 | let code = br.read_cb(mv_cb)? as i16; | |
103 | if code == 0 { return Ok(0) } | |
104 | if !br.read_bool()? { | |
105 | Ok(code) | |
106 | } else { | |
107 | Ok(-code) | |
108 | } | |
109 | } | |
110 | ||
111 | fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> { | |
112 | let xval = decode_mv_component(br, mv_cb)?; | |
113 | let yval = decode_mv_component(br, mv_cb)?; | |
114 | Ok(MV::new(xval, yval)) | |
115 | } | |
116 | ||
117 | fn decode_b_info(br: &mut BitReader, is_pb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> { | |
118 | if is_pb { // as improved pb | |
119 | let pb_mv_add = if is_intra { 1 } else { 0 }; | |
120 | if br.read_bool()?{ | |
121 | if br.read_bool()? { | |
122 | let pb_mv_count = 1 - (br.read(1)? as usize); | |
123 | let cbpb = br.read(6)? as u8; | |
124 | Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1)) | |
125 | } else { | |
126 | Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true)) | |
127 | } | |
128 | } else { | |
129 | Ok(BBlockInfo::new(true, 0, pb_mv_add, false)) | |
130 | } | |
131 | } else { | |
132 | Ok(BBlockInfo::new(false, 0, 0, false)) | |
133 | } | |
134 | } | |
135 | ||
136 | impl<'a> BlockDecoder for Intel263BR<'a> { | |
137 | ||
138 | #[allow(unused_variables)] | |
139 | fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> { | |
140 | let mut br = &mut self.br; | |
141 | let syncw = br.read(22)?; | |
142 | validate!(syncw == 0x000020); | |
143 | let tr = br.read(8)? as u8; | |
144 | check_marker(br)?; | |
145 | let id = br.read(1)?; | |
146 | validate!(id == 0); | |
147 | br.read(1)?; // split screen indicator | |
148 | br.read(1)?; // document camera indicator | |
149 | br.read(1)?; // freeze picture release | |
150 | let mut sfmt = br.read(3)?; | |
151 | validate!((sfmt != 0b000) && (sfmt != 0b110)); | |
152 | let is_intra = !br.read_bool()?; | |
153 | let umv = br.read_bool()?; | |
154 | br.read(1)?; // syntax arithmetic coding | |
155 | let apm = br.read_bool()?; | |
156 | self.is_pb = br.read_bool()?; | |
157 | let deblock; | |
158 | if sfmt == 0b111 { | |
159 | sfmt = br.read(3)?; | |
160 | validate!((sfmt != 0b000) && (sfmt != 0b111)); | |
161 | br.read(2)?; // unknown flags | |
162 | deblock = br.read_bool()?; | |
163 | br.read(1)?; // unknown flag | |
164 | let pbplus = br.read_bool()?; | |
165 | br.read(5)?; // unknown flags | |
166 | let marker = br.read(5)?; | |
167 | validate!(marker == 1); | |
168 | } else { | |
169 | deblock = false; | |
170 | } | |
171 | let w; let h; | |
172 | if sfmt == 0b110 { | |
173 | let par = br.read(4)?; | |
174 | w = ((br.read(9)? + 1) * 4) as usize; | |
175 | check_marker(br)?; | |
176 | h = ((br.read(9)? + 1) * 4) as usize; | |
177 | if par == 0b1111 { | |
178 | let pixw = br.read(8)?; | |
179 | let pixh = br.read(8)?; | |
180 | validate!((pixw != 0) && (pixh != 0)); | |
181 | } | |
182 | } else { | |
183 | let (w_, h_) = H263_SIZES[sfmt as usize]; | |
184 | w = w_; | |
185 | h = h_; | |
186 | } | |
187 | let quant = br.read(5)?; | |
188 | let cpm = br.read_bool()?; | |
189 | validate!(!cpm); | |
190 | ||
191 | let pbinfo; | |
192 | if self.is_pb { | |
193 | let trb = br.read(3)?; | |
194 | let dbquant = br.read(2)?; | |
195 | pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8)); | |
196 | } else { | |
197 | pbinfo = None; | |
198 | } | |
199 | while br.read_bool()? { // skip PEI | |
200 | br.read(8)?; | |
201 | } | |
202 | //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell()); | |
203 | self.gob_no = 0; | |
204 | self.mb_w = (w + 15) >> 4; | |
205 | ||
206 | let ftype = if is_intra { Type::I } else { Type::P }; | |
207 | let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None }; | |
208 | let picinfo = PicInfo::new(w, h, ftype, umv, apm, quant as u8, tr, pbinfo, plusinfo); | |
209 | Ok(picinfo) | |
210 | } | |
211 | ||
212 | #[allow(unused_variables)] | |
213 | fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> { | |
214 | let mut br = &mut self.br; | |
215 | let gbsc = br.read(17)?; | |
216 | validate!(gbsc == 1); | |
217 | let gn = br.read(5)?; | |
218 | let gfid = br.read(2)?; | |
219 | let gquant = br.read(5)?; | |
220 | //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant); | |
221 | let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8); | |
222 | self.gob_no += 1; | |
223 | Ok(ret) | |
224 | } | |
225 | ||
226 | #[allow(unused_variables)] | |
227 | fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> { | |
228 | let mut br = &mut self.br; | |
229 | let mut q = slice.get_quant(); | |
230 | match info.get_mode() { | |
231 | Type::I => { | |
232 | let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; | |
233 | while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; } | |
234 | let cbpy = br.read_cb(&self.tables.cbpy_cb)?; | |
235 | let cbp = (cbpy << 2) | (cbpc & 3); | |
236 | let dquant = (cbpc & 4) != 0; | |
237 | if dquant { | |
238 | let idx = br.read(2)? as usize; | |
239 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
240 | } | |
241 | Ok(BlockInfo::new(Type::I, cbp, q)) | |
242 | }, | |
243 | Type::P => { | |
244 | if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); } | |
245 | let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; | |
246 | while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; } | |
247 | let is_intra = (cbpc & 0x04) != 0; | |
248 | let dquant = (cbpc & 0x08) != 0; | |
249 | let is_4x4 = (cbpc & 0x10) != 0; | |
250 | if is_intra { | |
251 | let mut mvec: Vec<MV> = Vec::new(); | |
252 | let bbinfo = decode_b_info(br, self.is_pb, true)?; | |
253 | let cbpy = br.read_cb(&self.tables.cbpy_cb)?; | |
254 | let cbp = (cbpy << 2) | (cbpc & 3); | |
255 | if dquant { | |
256 | let idx = br.read(2)? as usize; | |
257 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
258 | } | |
259 | let mut binfo = BlockInfo::new(Type::I, cbp, q); | |
260 | binfo.set_bpart(bbinfo); | |
261 | if self.is_pb { | |
262 | for _ in 0..bbinfo.get_num_mv() { | |
263 | mvec.push(decode_mv(br, &self.tables.mv_cb)?); | |
264 | } | |
265 | binfo.set_b_mv(mvec.as_slice()); | |
266 | } | |
267 | return Ok(binfo); | |
268 | } | |
269 | ||
270 | let bbinfo = decode_b_info(br, self.is_pb, false)?; | |
271 | let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?; | |
272 | // if /* !aiv && */(cbpc & 3) != 3 { | |
273 | cbpy ^= 0xF; | |
274 | // } | |
275 | let cbp = (cbpy << 2) | (cbpc & 3); | |
276 | if dquant { | |
277 | let idx = br.read(2)? as usize; | |
278 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
279 | } | |
280 | let mut binfo = BlockInfo::new(Type::P, cbp, q); | |
281 | binfo.set_bpart(bbinfo); | |
282 | if !is_4x4 { | |
283 | let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?]; | |
284 | binfo.set_mv(&mvec); | |
285 | } else { | |
286 | let mvec: [MV; 4] = [ | |
287 | decode_mv(br, &self.tables.mv_cb)?, | |
288 | decode_mv(br, &self.tables.mv_cb)?, | |
289 | decode_mv(br, &self.tables.mv_cb)?, | |
290 | decode_mv(br, &self.tables.mv_cb)? | |
291 | ]; | |
292 | binfo.set_mv(&mvec); | |
293 | } | |
294 | if self.is_pb { | |
295 | let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv()); | |
296 | for _ in 0..bbinfo.get_num_mv() { | |
297 | let mv = decode_mv(br, &self.tables.mv_cb)?; | |
298 | mvec.push(mv); | |
299 | } | |
300 | binfo.set_b_mv(mvec.as_slice()); | |
301 | } | |
302 | Ok(binfo) | |
303 | }, | |
304 | _ => { Err(DecoderError::InvalidData) }, | |
305 | } | |
306 | } | |
307 | ||
308 | #[allow(unused_variables)] | |
309 | fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { | |
310 | self.decode_block(quant, true, coded, blk) | |
311 | } | |
312 | ||
313 | #[allow(unused_variables)] | |
314 | fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { | |
315 | self.decode_block(quant, false, coded, blk) | |
316 | } | |
317 | ||
318 | fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 } | |
319 | ||
320 | fn is_gob(&mut self) -> bool { true } | |
321 | } | |
322 | ||
323 | impl Intel263Decoder { | |
324 | fn new() -> Self { | |
325 | let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC); | |
326 | let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
327 | let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC); | |
328 | let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
329 | let mut coderead = H263ShortCodeReader::new(H263_CBPY); | |
330 | let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
331 | let mut coderead = H263RLCodeReader::new(H263_RL_CODES); | |
332 | let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
333 | let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC); | |
334 | let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
335 | let mut coderead = H263ShortCodeReader::new(H263_MV); | |
336 | let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
337 | let tables = Tables { | |
338 | intra_mcbpc_cb: intra_mcbpc_cb, | |
339 | inter_mcbpc_cb: inter_mcbpc_cb, | |
340 | cbpy_cb: cbpy_cb, | |
341 | rl_cb: rl_cb, | |
342 | aic_rl_cb: aic_rl_cb, | |
343 | mv_cb: mv_cb, | |
344 | }; | |
345 | ||
346 | Intel263Decoder{ | |
347 | info: Rc::new(DUMMY_CODEC_INFO), | |
348 | dec: H263BaseDecoder::new(), | |
349 | tables: tables, | |
350 | bdsp: H263BlockDSP::new(), | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | impl NADecoder for Intel263Decoder { | |
356 | fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> { | |
357 | if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { | |
358 | let w = vinfo.get_width(); | |
359 | let h = vinfo.get_height(); | |
360 | let fmt = formats::YUV420_FORMAT; | |
361 | let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt)); | |
362 | self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata())); | |
363 | Ok(()) | |
364 | } else { | |
365 | Err(DecoderError::InvalidData) | |
366 | } | |
367 | } | |
368 | fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { | |
369 | let src = pkt.get_buffer(); | |
370 | ||
371 | if src.len() == 8 { | |
372 | let bret = self.dec.get_bframe(&self.bdsp); | |
373 | let buftype; | |
374 | let is_skip; | |
375 | if let Ok(btype) = bret { | |
376 | buftype = btype; | |
377 | is_skip = false; | |
378 | } else { | |
379 | buftype = NABufferType::None; | |
380 | is_skip = true; | |
381 | } | |
382 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype); | |
383 | frm.set_keyframe(false); | |
384 | frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B }); | |
385 | return Ok(Rc::new(RefCell::new(frm))); | |
386 | } | |
387 | let mut ibr = Intel263BR::new(&src, &self.tables); | |
388 | ||
389 | let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?; | |
390 | ||
391 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo); | |
392 | frm.set_keyframe(self.dec.is_intra()); | |
393 | frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P }); | |
394 | Ok(Rc::new(RefCell::new(frm))) | |
395 | } | |
396 | } | |
397 | ||
398 | ||
399 | pub fn get_decoder() -> Box<NADecoder> { | |
400 | Box::new(Intel263Decoder::new()) | |
401 | } | |
402 | ||
403 | #[cfg(test)] | |
404 | mod test { | |
405 | use test::dec_video::test_file_decoding; | |
406 | #[test] | |
407 | fn test_intel263() { | |
408 | test_file_decoding("avi", "assets/neal73_saber.avi", Some(16), true, false, Some("i263")); | |
409 | } | |
410 | } |