1 use crate::io::bitreader::*;
2 use crate::io::codebook::*;
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> {
36 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
37 let mark = br.read(1)?;
42 impl<'a> Intel263BR<'a> {
43 fn new(src: &'a [u8], tables: &'a Tables) -> Self {
45 br: BitReader::new(src, src.len(), BitReaderMode::BE),
54 fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
55 let br = &mut self.br;
58 let mut dc = br.read(8)?;
59 if dc == 255 { dc = 128; }
60 blk[0] = (dc as i16) << 3;
63 if !coded { return Ok(()); }
65 let rl_cb = &self.tables.rl_cb; // could be aic too
66 let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 };
67 let q = (quant * 2) as i16;
69 let code = br.read_cb(rl_cb)?;
73 if !code.is_escape() {
75 level = code.get_level();
76 last = code.is_last();
77 if br.read_bool()? { level = -level; }
78 level = (level * q) + q_add;
80 last = br.read_bool()?;
81 run = br.read(6)? as u8;
82 level = br.read_s(8)? as i16;
84 let low = br.read(5)? as i16;
85 let top = br.read_s(6)? as i16;
86 level = (top << 5) | low;
88 level = (level * q) + q_add;
89 if level < -2048 { level = -2048; }
90 if level > 2047 { level = 2047; }
94 let oidx = H263_ZIGZAG[idx as usize];
103 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
104 let code = br.read_cb(mv_cb)? as i16;
105 if code == 0 { return Ok(0) }
106 if !br.read_bool()? {
113 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
114 let xval = decode_mv_component(br, mv_cb)?;
115 let yval = decode_mv_component(br, mv_cb)?;
116 Ok(MV::new(xval, yval))
119 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
120 if is_pb { // as improved pb
122 let pb_mv_add = if is_intra { 1 } else { 0 };
125 let pb_mv_count = 1 - (br.read(1)? as usize);
126 let cbpb = br.read(6)? as u8;
127 Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
129 Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
132 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
135 let mvdb = br.read_bool()?;
136 let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
137 Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
140 Ok(BBlockInfo::new(false, 0, 0, false))
144 impl<'a> BlockDecoder for Intel263BR<'a> {
146 #[allow(unused_variables)]
147 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
148 let br = &mut self.br;
149 let syncw = br.read(22)?;
150 validate!(syncw == 0x000020);
151 let tr = (br.read(8)? << 8) as u16;
153 let id = br.read(1)?;
155 br.read(1)?; // split screen indicator
156 br.read(1)?; // document camera indicator
157 br.read(1)?; // freeze picture release
158 let mut sfmt = br.read(3)?;
159 validate!((sfmt != 0b000) && (sfmt != 0b110));
160 let is_intra = !br.read_bool()?;
161 let umv = br.read_bool()?;
162 br.read(1)?; // syntax arithmetic coding
163 let apm = br.read_bool()?;
164 self.is_pb = br.read_bool()?;
169 validate!((sfmt != 0b000) && (sfmt != 0b111));
170 br.read(2)?; // unknown flags
171 deblock = br.read_bool()?;
172 br.read(1)?; // unknown flag
173 pbplus = br.read_bool()?;
174 br.read(5)?; // unknown flags
175 let marker = br.read(5)?;
176 validate!(marker == 1);
181 self.is_ipb = pbplus;
184 let par = br.read(4)?;
185 w = ((br.read(9)? + 1) * 4) as usize;
187 h = ((br.read(9)? + 1) * 4) as usize;
189 let pixw = br.read(8)?;
190 let pixh = br.read(8)?;
191 validate!((pixw != 0) && (pixh != 0));
194 let (w_, h_) = H263_SIZES[sfmt as usize];
198 let quant = br.read(5)?;
199 let cpm = br.read_bool()?;
204 let trb = br.read(3)?;
205 let dbquant = br.read(2)?;
206 pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
210 while br.read_bool()? { // skip PEI
213 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
215 self.mb_w = (w + 15) >> 4;
217 let ftype = if is_intra { Type::I } else { Type::P };
218 let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
219 let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
220 let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
224 #[allow(unused_variables)]
225 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
226 let br = &mut self.br;
227 let gbsc = br.read(17)?;
228 validate!(gbsc == 1);
229 let gn = br.read(5)?;
230 let gfid = br.read(2)?;
231 let gquant = br.read(5)?;
232 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
233 let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
238 #[allow(unused_variables)]
239 fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
240 let br = &mut self.br;
241 let mut q = slice.get_quant();
242 match info.get_mode() {
244 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
245 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
246 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
247 let cbp = (cbpy << 2) | (cbpc & 3);
248 let dquant = (cbpc & 4) != 0;
250 let idx = br.read(2)? as usize;
251 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
253 Ok(BlockInfo::new(Type::I, cbp, q))
256 if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
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;
263 let mut mvec: Vec<MV> = Vec::new();
264 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
265 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
266 let cbp = (cbpy << 2) | (cbpc & 3);
268 let idx = br.read(2)? as usize;
269 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
271 let mut binfo = BlockInfo::new(Type::I, cbp, q);
272 binfo.set_bpart(bbinfo);
274 for _ in 0..bbinfo.get_num_mv() {
275 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
277 binfo.set_b_mv(mvec.as_slice());
282 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
283 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
284 // if /* !aiv && */(cbpc & 3) != 3 {
287 let cbp = (cbpy << 2) | (cbpc & 3);
289 let idx = br.read(2)? as usize;
290 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
292 let mut binfo = BlockInfo::new(Type::P, cbp, q);
293 binfo.set_bpart(bbinfo);
295 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
298 let mvec: [MV; 4] = [
299 decode_mv(br, &self.tables.mv_cb)?,
300 decode_mv(br, &self.tables.mv_cb)?,
301 decode_mv(br, &self.tables.mv_cb)?,
302 decode_mv(br, &self.tables.mv_cb)?
307 let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
308 for _ in 0..bbinfo.get_num_mv() {
309 let mv = decode_mv(br, &self.tables.mv_cb)?;
312 binfo.set_b_mv(mvec.as_slice());
316 _ => { Err(DecoderError::InvalidData) },
320 #[allow(unused_variables)]
321 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
322 self.decode_block(quant, true, coded, blk)
325 #[allow(unused_variables)]
326 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
327 self.decode_block(quant, false, coded, blk)
330 fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
333 impl Intel263Decoder {
335 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
336 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
337 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
338 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
339 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
340 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
341 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
342 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
343 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
344 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
345 let mut coderead = H263ShortCodeReader::new(H263_MV);
346 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
347 let tables = Tables {
348 intra_mcbpc_cb: intra_mcbpc_cb,
349 inter_mcbpc_cb: inter_mcbpc_cb,
352 aic_rl_cb: aic_rl_cb,
357 info: Rc::new(DUMMY_CODEC_INFO),
358 dec: H263BaseDecoder::new(true),
360 bdsp: H263BlockDSP::new(),
365 impl NADecoder for Intel263Decoder {
366 fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
367 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
368 let w = vinfo.get_width();
369 let h = vinfo.get_height();
370 let fmt = formats::YUV420_FORMAT;
371 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
372 self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
375 Err(DecoderError::InvalidData)
378 fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
379 let src = pkt.get_buffer();
382 let bret = self.dec.get_bframe(&self.bdsp);
385 if let Ok(btype) = bret {
389 buftype = NABufferType::None;
392 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
393 frm.set_keyframe(false);
394 frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
395 return Ok(Rc::new(RefCell::new(frm)));
397 let mut ibr = Intel263BR::new(&src, &self.tables);
399 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
401 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
402 frm.set_keyframe(self.dec.is_intra());
403 frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
404 Ok(Rc::new(RefCell::new(frm)))
409 pub fn get_decoder() -> Box<NADecoder> {
410 Box::new(Intel263Decoder::new())
415 use crate::test::dec_video::test_file_decoding;
418 test_file_decoding("avi", "assets/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/);