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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::code::H263BlockDSP; | |
7 | use super::decoder::*; | |
8 | use super::data::*; | |
9 | ||
10 | #[allow(dead_code)] | |
11 | struct Tables { | |
12 | intra_mcbpc_cb: Codebook<u8>, | |
13 | inter_mcbpc_cb: Codebook<u8>, | |
14 | mbtype_b_cb: Codebook<u8>, | |
15 | cbpy_cb: Codebook<u8>, | |
16 | cbpc_b_cb: Codebook<u8>, | |
17 | rl_cb: Codebook<H263RLSym>, | |
18 | aic_rl_cb: Codebook<H263RLSym>, | |
19 | mv_cb: Codebook<u8>, | |
20 | } | |
21 | ||
22 | #[derive(Clone,Copy)] | |
23 | struct RPRInfo { | |
24 | present: bool, | |
25 | bits: u8, | |
26 | widths: [usize; 8], | |
27 | heights: [usize; 8], | |
28 | } | |
29 | ||
30 | struct RealVideo20Decoder { | |
31 | info: Rc<NACodecInfo>, | |
32 | dec: H263BaseDecoder, | |
33 | tables: Tables, | |
34 | w: usize, | |
35 | h: usize, | |
36 | minor_ver: u8, | |
37 | rpr: RPRInfo, | |
38 | bdsp: H263BlockDSP, | |
39 | } | |
40 | ||
41 | struct RealVideo20BR<'a> { | |
42 | br: BitReader<'a>, | |
43 | tables: &'a Tables, | |
44 | num_slices: usize, | |
45 | slice_no: usize, | |
46 | slice_off: Vec<u32>, | |
47 | w: usize, | |
48 | h: usize, | |
49 | mb_w: usize, | |
50 | mb_h: usize, | |
51 | mb_pos_bits: u8, | |
52 | minor_ver: u8, | |
53 | rpr: RPRInfo, | |
54 | } | |
55 | ||
56 | struct RV20SliceInfo { | |
57 | ftype: Type, | |
58 | seq: u32, | |
59 | qscale: u8, | |
60 | mb_x: usize, | |
61 | mb_y: usize, | |
62 | mb_pos: usize, | |
63 | w: usize, | |
64 | h: usize, | |
65 | } | |
66 | ||
67 | impl RV20SliceInfo { | |
68 | fn new(ftype: Type, seq: u32, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self { | |
69 | RV20SliceInfo { ftype: ftype, seq: seq, qscale: qscale, mb_x: mb_x, mb_y: mb_y, mb_pos: mb_pos, w: w, h: h } | |
70 | } | |
71 | } | |
72 | ||
73 | impl<'a> RealVideo20BR<'a> { | |
74 | fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self { | |
75 | let nslices = (src[0] as usize) + 1; | |
76 | let mut slice_offs = Vec::with_capacity(nslices); | |
77 | { | |
78 | let offs = &src[1..][..nslices * 8]; | |
79 | let mut br = BitReader::new(offs, offs.len(), BitReaderMode::BE); | |
80 | for _ in 0..nslices { | |
81 | br.skip(32).unwrap(); | |
82 | let off = br.read(32).unwrap(); | |
83 | slice_offs.push(off); | |
84 | } | |
85 | } | |
86 | let soff = nslices * 8 + 1; | |
87 | let mb_w = (width + 15) >> 4; | |
88 | let mb_h = (height + 15) >> 4; | |
89 | let max_pos = mb_w * mb_h - 1; | |
90 | let mut mbpb = 0; | |
91 | for i in 0..H263_MBB.len() { | |
92 | if max_pos <= H263_MBB[i].blocks { | |
93 | mbpb = H263_MBB[i].bits; | |
94 | break; | |
95 | } | |
96 | } | |
97 | RealVideo20BR { | |
98 | br: BitReader::new(&src[soff..], src.len() - soff, BitReaderMode::BE), | |
99 | tables: tables, | |
100 | num_slices: nslices, | |
101 | slice_no: 0, | |
102 | slice_off: slice_offs, | |
103 | w: width, | |
104 | h: height, | |
105 | mb_w: mb_w, | |
106 | mb_h: mb_h, | |
107 | mb_pos_bits: mbpb, | |
108 | minor_ver: minor_ver, | |
109 | rpr: rpr, | |
110 | } | |
111 | } | |
112 | ||
113 | #[allow(unused_variables)] | |
114 | fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize, acpred: ACPredMode) -> DecoderResult<()> { | |
115 | let br = &mut self.br; | |
116 | let mut idx = 0; | |
117 | if !sstate.is_iframe && intra { | |
118 | let mut dc = br.read(8)? as i16; | |
119 | if dc == 255 { dc = 128; } | |
120 | blk[0] = dc << 3; | |
121 | idx = 1; | |
122 | } | |
123 | if !coded { return Ok(()); } | |
124 | let scan = match acpred { | |
125 | ACPredMode::Hor => H263_SCAN_V, | |
126 | ACPredMode::Ver => H263_SCAN_H, | |
127 | _ => H263_ZIGZAG, | |
128 | }; | |
129 | ||
130 | let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb }; | |
131 | let q_add = if quant == 0 || sstate.is_iframe { 0i16 } else { ((quant - 1) | 1) as i16 }; | |
132 | let q = (quant * 2) as i16; | |
133 | while idx < 64 { | |
134 | let code = br.read_cb(rl_cb)?; | |
135 | let run; | |
136 | let mut level; | |
137 | let last; | |
138 | if !code.is_escape() { | |
139 | run = code.get_run(); | |
140 | level = code.get_level(); | |
141 | last = code.is_last(); | |
142 | if br.read_bool()? { level = -level; } | |
143 | level = (level * q) + q_add; | |
144 | } else { | |
145 | last = br.read_bool()?; | |
146 | run = br.read(6)? as u8; | |
147 | level = br.read_s(8)? as i16; | |
148 | if level == -128 { | |
149 | let low = br.read(5)? as i16; | |
150 | let top = br.read_s(6)? as i16; | |
151 | level = (top << 5) | low; | |
152 | } | |
153 | level = (level * q) + q_add; | |
154 | if level < -2048 { level = -2048; } | |
155 | if level > 2047 { level = 2047; } | |
156 | } | |
157 | idx += run; | |
158 | validate!(idx < 64); | |
159 | let oidx = scan[idx as usize]; | |
160 | blk[oidx] = level; | |
161 | idx += 1; | |
162 | if last { break; } | |
163 | } | |
164 | Ok(()) | |
165 | } | |
166 | } | |
167 | ||
168 | fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> { | |
169 | let code = br.read_cb(mv_cb)? as i16; | |
170 | if code == 0 { return Ok(0) } | |
171 | if !br.read_bool()? { | |
172 | Ok(code) | |
173 | } else { | |
174 | Ok(-code) | |
175 | } | |
176 | } | |
177 | ||
178 | fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> { | |
179 | let xval = decode_mv_component(br, mv_cb)?; | |
180 | let yval = decode_mv_component(br, mv_cb)?; | |
181 | Ok(MV::new(xval, yval)) | |
182 | } | |
183 | ||
184 | impl<'a> BlockDecoder for RealVideo20BR<'a> { | |
185 | ||
186 | #[allow(unused_variables)] | |
187 | fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> { | |
188 | self.slice_no = 0; | |
189 | let shdr = self.read_slice_header()?; | |
190 | // self.slice_no += 1; | |
191 | validate!((shdr.mb_x == 0) && (shdr.mb_y == 0)); | |
192 | /* let mb_count; | |
193 | if self.slice_no < self.num_slices { | |
194 | let pos = self.br.tell(); | |
195 | let shdr2 = self.read_slice_header()?; | |
196 | self.br.seek(pos as u32)?; | |
197 | mb_count = shdr2.mb_pos - shdr.mb_pos; | |
198 | } else { | |
199 | mb_count = self.mb_w * self.mb_h; | |
200 | }*/ | |
201 | ||
202 | let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false)); | |
203 | let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, MVMode::Long, false, false, shdr.qscale, shdr.seq as u16, None, plusinfo); | |
204 | Ok(picinfo) | |
205 | } | |
206 | ||
207 | #[allow(unused_variables)] | |
208 | fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> { | |
209 | let shdr = self.read_slice_header()?; | |
210 | self.slice_no += 1; | |
211 | let mb_count; | |
212 | if self.slice_no < self.num_slices { | |
213 | let pos = self.br.tell(); | |
214 | let shdr2 = self.read_slice_header()?; | |
215 | mb_count = shdr2.mb_pos - shdr.mb_pos; | |
216 | self.br.seek(pos as u32)?; | |
217 | } else { | |
218 | mb_count = self.mb_w * self.mb_h - shdr.mb_pos; | |
219 | } | |
220 | let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale); | |
221 | ||
222 | Ok(ret) | |
223 | } | |
224 | ||
225 | fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, _sstate: &SliceState) -> DecoderResult<BlockInfo> { | |
226 | let br = &mut self.br; | |
227 | let mut q = slice.get_quant(); | |
228 | match info.get_mode() { | |
229 | Type::I => { | |
230 | let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; | |
231 | while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; } | |
232 | let mut acpred = ACPredMode::None; | |
233 | if let Some(ref pi) = info.plusinfo { | |
234 | if pi.aic { | |
235 | let acpp = br.read_bool()?; | |
236 | acpred = ACPredMode::DC; | |
237 | if acpp { | |
238 | acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver }; | |
239 | } | |
240 | } | |
241 | } | |
242 | let cbpy = br.read_cb(&self.tables.cbpy_cb)?; | |
243 | let cbp = (cbpy << 2) | (cbpc & 3); | |
244 | let dquant = (cbpc & 4) != 0; | |
245 | if dquant { | |
246 | let idx = br.read(2)? as usize; | |
247 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
248 | } | |
249 | let mut binfo = BlockInfo::new(Type::I, cbp, q); | |
250 | binfo.set_acpred(acpred); | |
251 | Ok(binfo) | |
252 | }, | |
253 | Type::P => { | |
254 | if br.read_bool()? { | |
255 | return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); | |
256 | } | |
257 | let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; | |
258 | while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; } | |
259 | let is_intra = (cbpc & 0x04) != 0; | |
260 | let dquant = (cbpc & 0x08) != 0; | |
261 | let is_4x4 = (cbpc & 0x10) != 0; | |
262 | if is_intra { | |
263 | let cbpy = br.read_cb(&self.tables.cbpy_cb)?; | |
264 | let cbp = (cbpy << 2) | (cbpc & 3); | |
265 | if dquant { | |
266 | let idx = br.read(2)? as usize; | |
267 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
268 | } | |
269 | let binfo = BlockInfo::new(Type::I, cbp, q); | |
270 | return Ok(binfo); | |
271 | } | |
272 | ||
273 | let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?; | |
274 | // if /* !aiv && */(cbpc & 3) != 3 { | |
275 | cbpy ^= 0xF; | |
276 | // } | |
277 | let cbp = (cbpy << 2) | (cbpc & 3); | |
278 | if dquant { | |
279 | let idx = br.read(2)? as usize; | |
280 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
281 | } | |
282 | let mut binfo = BlockInfo::new(Type::P, cbp, q); | |
283 | if !is_4x4 { | |
284 | let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?]; | |
285 | binfo.set_mv(&mvec); | |
286 | } else { | |
287 | let mvec: [MV; 4] = [ | |
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 | decode_mv(br, &self.tables.mv_cb)? | |
292 | ]; | |
293 | binfo.set_mv(&mvec); | |
294 | } | |
295 | Ok(binfo) | |
296 | }, | |
297 | Type::B => { // B | |
298 | let mut mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; | |
299 | while mbtype == 14 { mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; } | |
300 | ||
301 | let is_coded = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_CODED) != 0; | |
302 | let is_intra = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_INTRA) != 0; | |
303 | let dquant = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_DQUANT) != 0; | |
304 | let is_fwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_FORWARD) != 0; | |
305 | let is_bwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_BACKWARD) != 0; | |
306 | ||
307 | let cbp = if is_coded { | |
308 | let cbpc = br.read_cb(&self.tables.cbpc_b_cb)?; | |
309 | let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?; | |
310 | if !is_intra { cbpy ^= 0xF; } | |
311 | (cbpy << 2) | (cbpc & 3) | |
312 | } else { 0 }; | |
313 | ||
314 | if dquant { | |
315 | let idx = br.read(2)? as usize; | |
316 | q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8; | |
317 | } | |
318 | ||
319 | if is_intra { | |
320 | let binfo = BlockInfo::new(Type::I, cbp, q); | |
321 | return Ok(binfo); | |
322 | } | |
323 | ||
324 | let mut binfo = BlockInfo::new(Type::B, cbp, q); | |
325 | if is_fwd { | |
326 | let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?]; | |
327 | binfo.set_mv(&mvec); | |
328 | } | |
329 | if is_bwd { | |
330 | let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?]; | |
331 | binfo.set_b_mv(&mvec); | |
332 | } | |
333 | Ok(binfo) | |
334 | }, | |
335 | _ => { unreachable!(); }, | |
336 | } | |
337 | } | |
338 | ||
339 | fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { | |
340 | self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred()) | |
341 | } | |
342 | ||
343 | #[allow(unused_variables)] | |
344 | fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> { | |
345 | self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None) | |
346 | } | |
347 | ||
348 | fn is_slice_end(&mut self) -> bool { false } | |
349 | } | |
350 | ||
351 | impl<'a> RealVideo20BR<'a> { | |
352 | #[allow(unused_variables)] | |
353 | fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> { | |
354 | validate!(self.slice_no < self.num_slices); | |
355 | ||
356 | let br = &mut self.br; | |
357 | br.seek(self.slice_off[self.slice_no] * 8)?; | |
358 | ||
359 | let frm_type = br.read(2)?; | |
360 | let ftype = match frm_type { | |
361 | 0 | 1 => { Type::I }, | |
362 | 2 => { Type::P }, | |
363 | _ => { Type::B }, | |
364 | }; | |
365 | ||
366 | let marker = br.read(1)?; | |
367 | validate!(marker == 0); | |
368 | let qscale = br.read(5)? as u8; | |
369 | validate!(qscale > 0); | |
370 | if self.minor_ver >= 2 { | |
371 | br.skip(1)?; // loop filter | |
372 | } | |
373 | let seq = if self.minor_ver <= 1 { | |
374 | br.read(8)? << 8 | |
375 | } else { | |
376 | br.read(13)? << 3 | |
377 | }; | |
378 | let w; | |
379 | let h; | |
380 | if self.rpr.present { | |
381 | let rpr = br.read(self.rpr.bits)? as usize; | |
382 | if rpr == 0 { | |
383 | w = self.w; | |
384 | h = self.h; | |
385 | } else { | |
386 | w = self.rpr.widths[rpr - 1]; | |
387 | h = self.rpr.heights[rpr - 1]; | |
388 | validate!((w != 0) && (h != 0)); | |
389 | } | |
390 | } else { | |
391 | w = self.w; | |
392 | h = self.h; | |
393 | } | |
394 | ||
395 | let mb_pos = br.read(self.mb_pos_bits)? as usize; | |
396 | let mb_x = mb_pos % self.mb_w; | |
397 | let mb_y = mb_pos / self.mb_w; | |
398 | ||
399 | br.skip(1)?; // no rounding | |
400 | ||
401 | if (self.minor_ver <= 1) && (frm_type == 3) { | |
402 | br.skip(5)?; | |
403 | } | |
404 | ||
405 | Ok(RV20SliceInfo::new(ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h)) | |
406 | } | |
407 | } | |
408 | ||
409 | impl RealVideo20Decoder { | |
410 | fn new() -> Self { | |
411 | let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC); | |
412 | let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
413 | let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC); | |
414 | let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
415 | let mut coderead = H263ShortCodeReader::new(H263_MBTYPE_B); | |
416 | let mbtype_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
417 | let mut coderead = H263ShortCodeReader::new(H263_CBPY); | |
418 | let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
419 | let mut coderead = H263ShortCodeReader::new(H263_CBPC_B); | |
420 | let cbpc_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
421 | let mut coderead = H263RLCodeReader::new(H263_RL_CODES); | |
422 | let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
423 | let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC); | |
424 | let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
425 | let mut coderead = H263ShortCodeReader::new(H263_MV); | |
426 | let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap(); | |
427 | ||
428 | let tables = Tables { | |
429 | intra_mcbpc_cb: intra_mcbpc_cb, | |
430 | inter_mcbpc_cb: inter_mcbpc_cb, | |
431 | mbtype_b_cb: mbtype_b_cb, | |
432 | cbpy_cb: cbpy_cb, | |
433 | cbpc_b_cb: cbpc_b_cb, | |
434 | rl_cb: rl_cb, | |
435 | aic_rl_cb: aic_rl_cb, | |
436 | mv_cb: mv_cb, | |
437 | }; | |
438 | ||
439 | RealVideo20Decoder{ | |
440 | info: Rc::new(DUMMY_CODEC_INFO), | |
441 | dec: H263BaseDecoder::new_b_frames(false), | |
442 | tables: tables, | |
443 | w: 0, | |
444 | h: 0, | |
445 | minor_ver: 0, | |
446 | rpr: RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] }, | |
447 | bdsp: H263BlockDSP::new(), | |
448 | } | |
449 | } | |
450 | } | |
451 | ||
452 | impl NADecoder for RealVideo20Decoder { | |
453 | #[allow(unused_variables)] | |
454 | fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> { | |
455 | if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { | |
456 | let w = vinfo.get_width(); | |
457 | let h = vinfo.get_height(); | |
458 | let fmt = formats::YUV420_FORMAT; | |
459 | let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt)); | |
460 | self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata())); | |
461 | self.w = w; | |
462 | self.h = h; | |
463 | ||
464 | let edata = info.get_extradata().unwrap(); | |
465 | let src: &[u8] = &edata; | |
466 | let ver = ((src[4] as u32) << 12) | ((src[5] as u32) << 4) | ((src[6] as u32) >> 4); | |
467 | let maj_ver = ver >> 16; | |
468 | let min_ver = (ver >> 8) & 0xFF; | |
469 | let mic_ver = ver & 0xFF; | |
470 | validate!(maj_ver == 2); | |
471 | self.minor_ver = min_ver as u8; | |
472 | let rprb = src[1] & 7; | |
473 | if rprb == 0 { | |
474 | self.rpr.present = false; | |
475 | } else { | |
476 | self.rpr.present = true; | |
477 | self.rpr.bits = ((rprb >> 1) + 1) as u8; | |
478 | for i in 4..(src.len()/2) { | |
479 | self.rpr.widths [i - 4] = (src[i * 2] as usize) * 4; | |
480 | self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4; | |
481 | } | |
482 | } | |
483 | Ok(()) | |
484 | } else { | |
485 | Err(DecoderError::InvalidData) | |
486 | } | |
487 | } | |
488 | fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { | |
489 | let src = pkt.get_buffer(); | |
490 | ||
491 | let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr); | |
492 | ||
493 | let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?; | |
494 | ||
495 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo); | |
496 | frm.set_keyframe(self.dec.is_intra()); | |
497 | frm.set_frame_type(self.dec.get_frame_type()); | |
498 | Ok(Rc::new(RefCell::new(frm))) | |
499 | } | |
500 | } | |
501 | ||
502 | struct MBB { blocks: usize, bits: u8 } | |
503 | const H263_MBB: &[MBB; 7] = &[ | |
504 | MBB{ blocks: 47, bits: 6 }, | |
505 | MBB{ blocks: 98, bits: 7 }, | |
506 | MBB{ blocks: 395, bits: 9 }, | |
507 | MBB{ blocks: 1583, bits: 11 }, | |
508 | MBB{ blocks: 6335, bits: 13 }, | |
509 | MBB{ blocks: 9215, bits: 14 }, | |
510 | MBB{ blocks: 65536, bits: 14 }, | |
511 | ]; | |
512 | ||
513 | pub fn get_decoder() -> Box<NADecoder> { | |
514 | Box::new(RealVideo20Decoder::new()) | |
515 | } | |
516 | ||
517 | #[cfg(test)] | |
518 | mod test { | |
519 | use test::dec_video::test_file_decoding; | |
520 | #[test] | |
521 | fn test_rv20() { | |
522 | test_file_decoding("realmedia", "assets/RV/rv20_svt_atrc_640x352_realproducer_plus_8.51.rm", /*None*/Some(3000), true, false, None/*Some("rv20")*/); | |
523 | // test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(1000), true, false, Some("rv20")); | |
524 | } | |
525 | } |