5 use super::blockdec::*;
6 use super::h263data::*;
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>,
18 struct Intel263Decoder {
19 info: Rc<NACodecInfo>,
20 dec: DCT8x8VideoDecoder,
24 struct Intel263BR<'a> {
32 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
33 let mark = br.read(1)?;
38 impl<'a> Intel263BR<'a> {
39 fn new(src: &'a [u8], tables: &'a Tables) -> Self {
41 br: BitReader::new(src, src.len(), BitReaderMode::BE),
49 fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
50 let mut br = &mut self.br;
53 let mut dc = br.read(8)?;
54 if dc == 255 { dc = 128; }
55 blk[0] = (dc as i16) << 3;
58 if !coded { return Ok(()); }
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;
64 let code = br.read_cb(rl_cb)?;
68 if !code.is_escape() {
70 level = code.get_level();
71 last = code.is_last();
72 if br.read_bool()? { level = -level; }
73 level = (level * q) + q_add;
75 last = br.read_bool()?;
76 run = br.read(6)? as u8;
77 level = br.read_s(8)? as i16;
79 let low = br.read(5)? as i16;
80 let top = br.read_s(6)? as i16;
81 level = (top << 5) | low;
83 level = (level * q) + q_add;
84 if level < -2048 { level = -2048; }
85 if level > 2047 { level = 2047; }
89 let oidx = H263_ZIGZAG[idx as usize];
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()? {
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))
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 };
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))
123 Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
126 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
129 Ok(BBlockInfo::new(false, 0, 0, false))
133 impl<'a> BlockDecoder for Intel263BR<'a> {
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;
142 let id = br.read(1)?;
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()?;
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);
167 let par = br.read(4)?;
168 w = ((br.read(9)? + 1) * 4) as usize;
170 h = ((br.read(9)? + 1) * 4) as usize;
172 let pixw = br.read(8)?;
173 let pixh = br.read(8)?;
174 validate!((pixw != 0) && (pixh != 0));
177 let (w_, h_) = H263_SIZES[sfmt as usize];
181 let quant = br.read(5)?;
182 let cpm = br.read_bool()?;
187 let trb = br.read(3)?;
188 let dbquant = br.read(2)?;
189 pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8));
193 while br.read_bool()? { // skip PEI
196 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
198 self.mb_w = (w + 15) >> 4;
200 let ftype = if is_intra { Type::I } else { Type::P };
201 let picinfo = PicInfo::new(w, h, ftype, quant as u8, apm, umv, tr, pbinfo);
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)?;
209 validate!(gbsc == 1);
210 let gn = br.read(5)?;
211 let gfid = br.read(2)?;
212 let gquant = br.read(5)?;
213 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
214 let ret = Slice::new(0, self.gob_no, gquant as u8);
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() {
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;
230 let idx = br.read(2)? as usize;
231 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
233 Ok(BlockInfo::new(Type::I, cbp, q))
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;
243 let mut mvec: Vec<MV> = Vec::new();
244 let bbinfo = decode_b_info(br, self.is_pb, true)?;
245 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
246 let cbp = (cbpy << 2) | (cbpc & 3);
248 let idx = br.read(2)? as usize;
249 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
251 let mut binfo = BlockInfo::new(Type::I, cbp, q);
252 binfo.set_bpart(bbinfo);
254 for _ in 0..bbinfo.get_num_mv() {
255 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
257 binfo.set_b_mv(mvec.as_slice());
262 let bbinfo = decode_b_info(br, self.is_pb, false)?;
263 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
264 // if /* !aiv && */(cbpc & 3) != 3 {
267 let cbp = (cbpy << 2) | (cbpc & 3);
269 let idx = br.read(2)? as usize;
270 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
272 let mut binfo = BlockInfo::new(Type::P, cbp, q);
273 binfo.set_bpart(bbinfo);
275 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
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)?
287 let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
288 for _ in 0..bbinfo.get_num_mv() {
289 let mv = decode_mv(br, &self.tables.mv_cb)?;
292 binfo.set_b_mv(mvec.as_slice());
296 _ => { Err(DecoderError::InvalidData) },
300 #[allow(unused_variables)]
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)
305 #[allow(unused_variables)]
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)
310 #[allow(unused_variables)]
311 fn calc_mv(&mut self, vec: MV) {}
313 fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
316 impl Intel263Decoder {
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,
335 aic_rl_cb: aic_rl_cb,
340 info: Rc::new(DUMMY_CODEC_INFO),
341 dec: DCT8x8VideoDecoder::new(),
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()));
357 Err(DecoderError::InvalidData)
360 fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
361 let src = pkt.get_buffer();
364 let bret = self.dec.get_bframe();
367 if let Ok(btype) = bret {
371 buftype = NABufferType::None;
374 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
375 frm.set_keyframe(false);
376 frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
377 return Ok(Rc::new(RefCell::new(frm)));
379 let mut ibr = Intel263BR::new(&src, &self.tables);
381 let bufinfo = self.dec.parse_frame(&mut ibr)?;
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)))
391 pub fn get_decoder() -> Box<NADecoder> {
392 Box::new(Intel263Decoder::new())
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);
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));
425 let pktres = dmx.get_frame();
426 if let Err(e) = pktres {
427 if e == DemuxerError::EOF { break; }
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);