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cf64af13 KS |
1 | use io::bitreader::*; |
2 | use io::codebook::*; | |
3 | use formats; | |
4 | use super::*; | |
5 | use super::blockdec::*; | |
6 | use super::h263data::*; | |
7 | ||
8 | #[allow(dead_code)] | |
9 | struct Tables { | |
10 | intra_mcbpc_cb: Codebook<u8>, | |
11 | inter_mcbpc_cb: Codebook<u8>, | |
12 | cbpy_cb: Codebook<u8>, | |
13 | rl_cb: Codebook<H263RLSym>, | |
14 | aic_rl_cb: Codebook<H263RLSym>, | |
15 | mv_cb: Codebook<u8>, | |
16 | } | |
17 | ||
18 | struct Intel263Decoder { | |
19 | info: Rc<NACodecInfo>, | |
20 | dec: DCT8x8VideoDecoder, | |
21 | tables: Tables, | |
22 | } | |
23 | ||
24 | struct Intel263BR<'a> { | |
25 | br: BitReader<'a>, | |
26 | tables: &'a Tables, | |
27 | gob_no: usize, | |
28 | mb_w: usize, | |
29 | is_pb: bool, | |
30 | } | |
31 | ||
32 | fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> { | |
33 | let mark = br.read(1)?; | |
34 | validate!(mark == 1); | |
35 | Ok(()) | |
36 | } | |
37 | ||
38 | impl<'a> Intel263BR<'a> { | |
39 | fn new(src: &'a [u8], tables: &'a Tables) -> Self { | |
40 | Intel263BR { | |
41 | br: BitReader::new(src, src.len(), BitReaderMode::BE), | |
42 | tables: tables, | |
43 | gob_no: 0, | |
44 | mb_w: 0, | |
45 | is_pb: false, | |
46 | } | |
47 | } | |
48 | ||
49 | fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { | |
50 | let mut br = &mut self.br; | |
51 | let mut idx = 0; | |
52 | if intra { | |
53 | let mut dc = br.read(8)?; | |
54 | if dc == 255 { dc = 128; } | |
55 | blk[0] = (dc as i16) << 3; | |
56 | idx = 1; | |
57 | } | |
58 | if !coded { return Ok(()); } | |
59 | ||
60 | let rl_cb = &self.tables.rl_cb; // could be aic too | |
61 | let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 }; | |
62 | let q = (quant * 2) as i16; | |
63 | while idx < 64 { | |
64 | let code = br.read_cb(rl_cb)?; | |
65 | let run; | |
66 | let mut level; | |
67 | let last; | |
68 | if !code.is_escape() { | |
69 | run = code.get_run(); | |
70 | level = code.get_level(); | |
71 | last = code.is_last(); | |
72 | if br.read_bool()? { level = -level; } | |
73 | level = (level * q) + q_add; | |
74 | } else { | |
75 | last = br.read_bool()?; | |
76 | run = br.read(6)? as u8; | |
77 | level = br.read_s(8)? as i16; | |
78 | if level == -128 { | |
79 | let low = br.read(5)? as i16; | |
80 | let top = br.read_s(6)? as i16; | |
81 | level = (top << 5) | low; | |
82 | } | |
83 | level = (level * q) + q_add; | |
84 | if level < -2048 { level = -2048; } | |
85 | if level > 2047 { level = 2047; } | |
86 | } | |
87 | idx += run; | |
88 | validate!(idx < 64); | |
89 | let oidx = H263_ZIGZAG[idx as usize]; | |
90 | blk[oidx] = level; | |
91 | idx += 1; | |
92 | if last { break; } | |
93 | } | |
94 | Ok(()) | |
95 | } | |
96 | } | |
97 | ||
98 | fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> { | |
99 | let code = br.read_cb(mv_cb)? as i16; | |
100 | if code == 0 { return Ok(0) } | |
101 | if !br.read_bool()? { | |
102 | Ok(code) | |
103 | } else { | |
104 | Ok(-code) | |
105 | } | |
106 | } | |
107 | ||
108 | fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> { | |
109 | let xval = decode_mv_component(br, mv_cb)?; | |
110 | let yval = decode_mv_component(br, mv_cb)?; | |
111 | Ok(MV::new(xval, yval)) | |
112 | } | |
113 | ||
21c16d5f KS |
114 | fn decode_b_info(br: &mut BitReader, is_pb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> { |
115 | if is_pb { // as improved pb | |
116 | let pb_mv_add = if is_intra { 1 } else { 0 }; | |
117 | if br.read_bool()?{ | |
118 | if br.read_bool()? { | |
119 | let pb_mv_count = 1 - (br.read(1)? as usize); | |
120 | let cbpb = br.read(6)? as u8; | |
121 | Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1)) | |
122 | } else { | |
123 | Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true)) | |
124 | } | |
125 | } else { | |
126 | Ok(BBlockInfo::new(true, 0, pb_mv_add, false)) | |
127 | } | |
128 | } else { | |
129 | Ok(BBlockInfo::new(false, 0, 0, false)) | |
130 | } | |
131 | } | |
132 | ||
cf64af13 KS |
133 | impl<'a> BlockDecoder for Intel263BR<'a> { |
134 | ||
135 | #[allow(unused_variables)] | |
136 | fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> { | |
137 | let mut br = &mut self.br; | |
138 | let syncw = br.read(22)?; | |
139 | validate!(syncw == 0x000020); | |
140 | let tr = br.read(8)? as u8; | |
141 | check_marker(br)?; | |
142 | let id = br.read(1)?; | |
143 | validate!(id == 0); | |
144 | br.read(1)?; // split screen indicator | |
145 | br.read(1)?; // document camera indicator | |
146 | br.read(1)?; // freeze picture release | |
147 | let mut sfmt = br.read(3)?; | |
148 | validate!((sfmt != 0b000) && (sfmt != 0b110)); | |
149 | let is_intra = !br.read_bool()?; | |
150 | let umv = br.read_bool()?; | |
151 | br.read(1)?; // syntax arithmetic coding | |
152 | let apm = br.read_bool()?; | |
153 | self.is_pb = br.read_bool()?; | |
154 | if sfmt == 0b111 { | |
155 | sfmt = br.read(3)?; | |
156 | validate!((sfmt != 0b000) && (sfmt != 0b111)); | |
157 | br.read(2)?; // unknown flags | |
158 | let deblock = br.read_bool()?; | |
159 | br.read(1)?; // unknown flag | |
160 | let pbplus = br.read_bool()?; | |
161 | br.read(5)?; // unknown flags | |
162 | let marker = br.read(5)?; | |
163 | validate!(marker == 1); | |
164 | } | |
165 | let w; let h; | |
166 | if sfmt == 0b110 { | |
167 | let par = br.read(4)?; | |
168 | w = ((br.read(9)? + 1) * 4) as usize; | |
169 | check_marker(br)?; | |
170 | h = ((br.read(9)? + 1) * 4) as usize; | |
171 | if par == 0b1111 { | |
172 | let pixw = br.read(8)?; | |
173 | let pixh = br.read(8)?; | |
174 | validate!((pixw != 0) && (pixh != 0)); | |
175 | } | |
176 | } else { | |
177 | let (w_, h_) = H263_SIZES[sfmt as usize]; | |
178 | w = w_; | |
179 | h = h_; | |
180 | } | |
181 | let quant = br.read(5)?; | |
182 | let cpm = br.read_bool()?; | |
183 | validate!(!cpm); | |
21c16d5f KS |
184 | |
185 | let pbinfo; | |
cf64af13 KS |
186 | if self.is_pb { |
187 | let trb = br.read(3)?; | |
188 | let dbquant = br.read(2)?; | |
21c16d5f KS |
189 | pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8)); |
190 | } else { | |
191 | pbinfo = None; | |
cf64af13 KS |
192 | } |
193 | while br.read_bool()? { // skip PEI | |
194 | br.read(8)?; | |
195 | } | |
21c16d5f | 196 | //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell()); |
cf64af13 KS |
197 | self.gob_no = 0; |
198 | self.mb_w = (w + 15) >> 4; | |
199 | ||
200 | let ftype = if is_intra { Type::I } else { Type::P }; | |
21c16d5f | 201 | let picinfo = PicInfo::new(w, h, ftype, quant as u8, apm, umv, tr, pbinfo); |
cf64af13 KS |
202 | Ok(picinfo) |
203 | } | |
204 | ||
205 | #[allow(unused_variables)] | |
206 | fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<Slice> { | |
207 | let mut br = &mut self.br; | |
208 | let gbsc = br.read(17)?; | |
cf64af13 KS |
209 | validate!(gbsc == 1); |
210 | let gn = br.read(5)?; | |
211 | let gfid = br.read(2)?; | |
212 | let gquant = br.read(5)?; | |
21c16d5f | 213 | //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant); |
cf64af13 KS |
214 | let ret = Slice::new(0, self.gob_no, gquant as u8); |
215 | self.gob_no += 1; | |
216 | Ok(ret) | |
217 | } | |
218 | ||
219 | fn decode_block_header(&mut self, info: &PicInfo, slice: &Slice) -> DecoderResult<BlockInfo> { | |
220 | let mut br = &mut self.br; | |
221 | let mut q = slice.get_quant(); | |
222 | match info.get_mode() { | |
223 | Type::I => { | |
224 | let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; | |
225 | while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; } | |
226 | let cbpy = br.read_cb(&self.tables.cbpy_cb)?; | |
227 | let cbp = (cbpy << 2) | (cbpc & 3); | |
228 | let dquant = (cbpc & 4) != 0; | |
229 | if dquant { | |
230 | let idx = br.read(2)? as usize; | |
231 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
232 | } | |
cf64af13 KS |
233 | Ok(BlockInfo::new(Type::I, cbp, q)) |
234 | }, | |
235 | Type::P => { | |
cf64af13 KS |
236 | if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); } |
237 | let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; | |
238 | while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; } | |
239 | let is_intra = (cbpc & 0x04) != 0; | |
240 | let dquant = (cbpc & 0x08) != 0; | |
241 | let is_4x4 = (cbpc & 0x10) != 0; | |
242 | if is_intra { | |
243 | let mut mvec: Vec<MV> = Vec::new(); | |
21c16d5f | 244 | let bbinfo = decode_b_info(br, self.is_pb, true)?; |
cf64af13 KS |
245 | let cbpy = br.read_cb(&self.tables.cbpy_cb)?; |
246 | let cbp = (cbpy << 2) | (cbpc & 3); | |
247 | if dquant { | |
248 | let idx = br.read(2)? as usize; | |
249 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
250 | } | |
251 | let mut binfo = BlockInfo::new(Type::I, cbp, q); | |
21c16d5f | 252 | binfo.set_bpart(bbinfo); |
cf64af13 | 253 | if self.is_pb { |
21c16d5f | 254 | for _ in 0..bbinfo.get_num_mv() { |
cf64af13 KS |
255 | mvec.push(decode_mv(br, &self.tables.mv_cb)?); |
256 | } | |
21c16d5f | 257 | binfo.set_b_mv(mvec.as_slice()); |
cf64af13 | 258 | } |
cf64af13 KS |
259 | return Ok(binfo); |
260 | } | |
261 | ||
21c16d5f | 262 | let bbinfo = decode_b_info(br, self.is_pb, false)?; |
cf64af13 KS |
263 | let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?; |
264 | // if /* !aiv && */(cbpc & 3) != 3 { | |
265 | cbpy ^= 0xF; | |
266 | // } | |
267 | let cbp = (cbpy << 2) | (cbpc & 3); | |
268 | if dquant { | |
269 | let idx = br.read(2)? as usize; | |
270 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
271 | } | |
272 | let mut binfo = BlockInfo::new(Type::P, cbp, q); | |
21c16d5f | 273 | binfo.set_bpart(bbinfo); |
cf64af13 KS |
274 | if !is_4x4 { |
275 | let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?]; | |
cf64af13 KS |
276 | binfo.set_mv(&mvec); |
277 | } else { | |
278 | let mvec: [MV; 4] = [ | |
279 | decode_mv(br, &self.tables.mv_cb)?, | |
280 | decode_mv(br, &self.tables.mv_cb)?, | |
281 | decode_mv(br, &self.tables.mv_cb)?, | |
282 | decode_mv(br, &self.tables.mv_cb)? | |
283 | ]; | |
284 | binfo.set_mv(&mvec); | |
285 | } | |
286 | if self.is_pb { | |
21c16d5f KS |
287 | let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv()); |
288 | for _ in 0..bbinfo.get_num_mv() { | |
cf64af13 KS |
289 | let mv = decode_mv(br, &self.tables.mv_cb)?; |
290 | mvec.push(mv); | |
291 | } | |
21c16d5f | 292 | binfo.set_b_mv(mvec.as_slice()); |
cf64af13 | 293 | } |
cf64af13 KS |
294 | Ok(binfo) |
295 | }, | |
296 | _ => { Err(DecoderError::InvalidData) }, | |
297 | } | |
298 | } | |
299 | ||
300 | #[allow(unused_variables)] | |
21c16d5f KS |
301 | fn decode_block_intra(&mut self, info: &BlockInfo, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { |
302 | self.decode_block(quant, true, coded, blk) | |
cf64af13 KS |
303 | } |
304 | ||
305 | #[allow(unused_variables)] | |
21c16d5f KS |
306 | fn decode_block_inter(&mut self, info: &BlockInfo, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { |
307 | self.decode_block(quant, false, coded, blk) | |
cf64af13 KS |
308 | } |
309 | ||
310 | #[allow(unused_variables)] | |
311 | fn calc_mv(&mut self, vec: MV) {} | |
312 | ||
313 | fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 } | |
314 | } | |
315 | ||
316 | impl Intel263Decoder { | |
317 | fn new() -> Self { | |
318 | let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC); | |
319 | let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
320 | let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC); | |
321 | let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
322 | let mut coderead = H263ShortCodeReader::new(H263_CBPY); | |
323 | let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
324 | let mut coderead = H263RLCodeReader::new(H263_RL_CODES); | |
325 | let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
326 | let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC); | |
327 | let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
328 | let mut coderead = H263ShortCodeReader::new(H263_MV); | |
329 | let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
330 | let tables = Tables { | |
331 | intra_mcbpc_cb: intra_mcbpc_cb, | |
332 | inter_mcbpc_cb: inter_mcbpc_cb, | |
333 | cbpy_cb: cbpy_cb, | |
334 | rl_cb: rl_cb, | |
335 | aic_rl_cb: aic_rl_cb, | |
336 | mv_cb: mv_cb, | |
337 | }; | |
338 | ||
339 | Intel263Decoder{ | |
340 | info: Rc::new(DUMMY_CODEC_INFO), | |
341 | dec: DCT8x8VideoDecoder::new(), | |
342 | tables: tables, | |
343 | } | |
344 | } | |
345 | } | |
346 | ||
347 | impl NADecoder for Intel263Decoder { | |
348 | fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> { | |
349 | if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { | |
350 | let w = vinfo.get_width(); | |
351 | let h = vinfo.get_height(); | |
352 | let fmt = formats::YUV420_FORMAT; | |
353 | let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt)); | |
354 | self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata())); | |
355 | Ok(()) | |
356 | } else { | |
357 | Err(DecoderError::InvalidData) | |
358 | } | |
359 | } | |
360 | fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { | |
361 | let src = pkt.get_buffer(); | |
362 | ||
363 | if src.len() == 8 { | |
21c16d5f | 364 | let bret = self.dec.get_bframe(); |
cf64af13 KS |
365 | let buftype; |
366 | let is_skip; | |
367 | if let Ok(btype) = bret { | |
368 | buftype = btype; | |
369 | is_skip = false; | |
370 | } else { | |
371 | buftype = NABufferType::None; | |
372 | is_skip = true; | |
373 | } | |
374 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype); | |
375 | frm.set_keyframe(false); | |
21c16d5f | 376 | frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B }); |
cf64af13 KS |
377 | return Ok(Rc::new(RefCell::new(frm))); |
378 | } | |
cf64af13 KS |
379 | let mut ibr = Intel263BR::new(&src, &self.tables); |
380 | ||
381 | let bufinfo = self.dec.parse_frame(&mut ibr)?; | |
382 | ||
383 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo); | |
384 | frm.set_keyframe(self.dec.is_intra()); | |
385 | frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P }); | |
386 | Ok(Rc::new(RefCell::new(frm))) | |
387 | } | |
388 | } | |
389 | ||
390 | ||
391 | pub fn get_decoder() -> Box<NADecoder> { | |
392 | Box::new(Intel263Decoder::new()) | |
393 | } | |
394 | ||
395 | #[cfg(test)] | |
396 | mod test { | |
397 | use codecs::*; | |
398 | use demuxers::*; | |
399 | use io::byteio::*; | |
400 | ||
401 | #[test] | |
402 | fn test_intel263() { | |
403 | let avi_dmx = find_demuxer("avi").unwrap(); | |
404 | let mut file = File::open("assets/neal73_saber.avi").unwrap(); | |
405 | let mut fr = FileReader::new_read(&mut file); | |
406 | let mut br = ByteReader::new(&mut fr); | |
407 | let mut dmx = avi_dmx.new_demuxer(&mut br); | |
408 | dmx.open().unwrap(); | |
409 | ||
410 | let mut decs: Vec<Option<Box<NADecoder>>> = Vec::new(); | |
411 | for i in 0..dmx.get_num_streams() { | |
412 | let s = dmx.get_stream(i).unwrap(); | |
413 | let info = s.get_info(); | |
414 | let decfunc = find_decoder(info.get_name()); | |
415 | if let Some(df) = decfunc { | |
416 | let mut dec = (df)(); | |
417 | dec.init(info).unwrap(); | |
418 | decs.push(Some(dec)); | |
419 | } else { | |
420 | decs.push(None); | |
421 | } | |
422 | } | |
423 | ||
424 | loop { | |
425 | let pktres = dmx.get_frame(); | |
426 | if let Err(e) = pktres { | |
427 | if e == DemuxerError::EOF { break; } | |
428 | panic!("error"); | |
429 | } | |
430 | let pkt = pktres.unwrap(); | |
431 | //if pkt.get_pts().unwrap() > 263 { break; } | |
432 | let streamno = pkt.get_stream().get_id() as usize; | |
433 | if let Some(ref mut dec) = decs[streamno] { | |
434 | let frm = dec.decode(&pkt).unwrap(); | |
435 | if pkt.get_stream().get_info().is_video() { | |
436 | write_pgmyuv("ih263_", streamno, pkt.get_pts().unwrap(), frm); | |
437 | } | |
438 | } | |
439 | } | |
440 | //panic!("THE END"); | |
441 | } | |
442 | } |