8 use super::code::H263BlockDSP;
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>,
20 struct Intel263Decoder {
21 info: Rc<NACodecInfo>,
27 struct Intel263BR<'a> {
35 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
36 let mark = br.read(1)?;
41 impl<'a> Intel263BR<'a> {
42 fn new(src: &'a [u8], tables: &'a Tables) -> Self {
44 br: BitReader::new(src, src.len(), BitReaderMode::BE),
52 fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
53 let mut br = &mut self.br;
56 let mut dc = br.read(8)?;
57 if dc == 255 { dc = 128; }
58 blk[0] = (dc as i16) << 3;
61 if !coded { return Ok(()); }
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;
67 let code = br.read_cb(rl_cb)?;
71 if !code.is_escape() {
73 level = code.get_level();
74 last = code.is_last();
75 if br.read_bool()? { level = -level; }
76 level = (level * q) + q_add;
78 last = br.read_bool()?;
79 run = br.read(6)? as u8;
80 level = br.read_s(8)? as i16;
82 let low = br.read(5)? as i16;
83 let top = br.read_s(6)? as i16;
84 level = (top << 5) | low;
86 level = (level * q) + q_add;
87 if level < -2048 { level = -2048; }
88 if level > 2047 { level = 2047; }
92 let oidx = H263_ZIGZAG[idx as usize];
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()? {
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))
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 };
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))
126 Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
129 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
132 Ok(BBlockInfo::new(false, 0, 0, false))
136 impl<'a> BlockDecoder for Intel263BR<'a> {
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;
145 let id = br.read(1)?;
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()?;
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);
173 let par = br.read(4)?;
174 w = ((br.read(9)? + 1) * 4) as usize;
176 h = ((br.read(9)? + 1) * 4) as usize;
178 let pixw = br.read(8)?;
179 let pixh = br.read(8)?;
180 validate!((pixw != 0) && (pixh != 0));
183 let (w_, h_) = H263_SIZES[sfmt as usize];
187 let quant = br.read(5)?;
188 let cpm = br.read_bool()?;
193 let trb = br.read(3)?;
194 let dbquant = br.read(2)?;
195 pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8));
199 while br.read_bool()? { // skip PEI
202 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
204 self.mb_w = (w + 15) >> 4;
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);
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);
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() {
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;
238 let idx = br.read(2)? as usize;
239 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
241 Ok(BlockInfo::new(Type::I, cbp, q))
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;
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);
256 let idx = br.read(2)? as usize;
257 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
259 let mut binfo = BlockInfo::new(Type::I, cbp, q);
260 binfo.set_bpart(bbinfo);
262 for _ in 0..bbinfo.get_num_mv() {
263 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
265 binfo.set_b_mv(mvec.as_slice());
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 {
275 let cbp = (cbpy << 2) | (cbpc & 3);
277 let idx = br.read(2)? as usize;
278 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
280 let mut binfo = BlockInfo::new(Type::P, cbp, q);
281 binfo.set_bpart(bbinfo);
283 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
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)?
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)?;
300 binfo.set_b_mv(mvec.as_slice());
304 _ => { Err(DecoderError::InvalidData) },
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)
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)
318 fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
320 fn is_gob(&mut self) -> bool { true }
323 impl Intel263Decoder {
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,
342 aic_rl_cb: aic_rl_cb,
347 info: Rc::new(DUMMY_CODEC_INFO),
348 dec: H263BaseDecoder::new(),
350 bdsp: H263BlockDSP::new(),
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()));
365 Err(DecoderError::InvalidData)
368 fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
369 let src = pkt.get_buffer();
372 let bret = self.dec.get_bframe(&self.bdsp);
375 if let Ok(btype) = bret {
379 buftype = NABufferType::None;
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)));
387 let mut ibr = Intel263BR::new(&src, &self.tables);
389 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
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)))
399 pub fn get_decoder() -> Box<NADecoder> {
400 Box::new(Intel263Decoder::new())
405 use test::dec_video::test_file_decoding;
408 test_file_decoding("avi", "assets/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/);