1 use nihav_core::io::bitreader::*;
2 use nihav_core::io::codebook::*;
3 use nihav_core::formats;
4 use nihav_core::frame::*;
5 use nihav_core::codecs::*;
6 use nihav_codec_support::codecs::{MV, ZIGZAG};
7 use nihav_codec_support::codecs::h263::*;
8 use nihav_codec_support::codecs::h263::decoder::*;
9 use nihav_codec_support::codecs::h263::data::*;
10 use nihav_codec_support::codecs::h263::code::H263BlockDSP;
14 intra_mcbpc_cb: Codebook<u8>,
15 inter_mcbpc_cb: Codebook<u8>,
16 cbpy_cb: Codebook<u8>,
17 rl_cb: Codebook<H263RLSym>,
18 aic_rl_cb: Codebook<H263RLSym>,
22 struct Intel263Decoder {
27 lastframe: Option<NABufferType>,
31 struct Intel263BR<'a> {
40 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
41 let mark = br.read(1)?;
46 impl<'a> Intel263BR<'a> {
47 fn new(src: &'a [u8], tables: &'a Tables) -> Self {
49 br: BitReader::new(src, BitReaderMode::BE),
58 fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
59 let br = &mut self.br;
62 let mut dc = br.read(8)?;
63 if dc == 255 { dc = 128; }
64 blk[0] = (dc as i16) << 3;
67 if !coded { return Ok(()); }
69 let rl_cb = &self.tables.rl_cb; // could be aic too
70 let q_add = if quant == 0 { 0i16 } else { i16::from((quant - 1) | 1) };
71 let q = i16::from(quant * 2);
73 let code = br.read_cb(rl_cb)?;
77 if !code.is_escape() {
79 level = code.get_level();
80 last = code.is_last();
81 if br.read_bool()? { level = -level; }
82 level = (level * q) + q_add;
84 last = br.read_bool()?;
85 run = br.read(6)? as u8;
86 level = br.read_s(8)? as i16;
88 let low = br.read(5)? as i16;
89 let top = br.read_s(6)? as i16;
90 level = (top << 5) | low;
92 level = (level * q) + q_add;
93 if level < -2048 { level = -2048; }
94 if level > 2047 { level = 2047; }
98 let oidx = ZIGZAG[idx as usize];
107 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
108 let code = i16::from(br.read_cb(mv_cb)?);
109 if code == 0 { return Ok(0) }
110 if !br.read_bool()? {
117 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
118 let xval = decode_mv_component(br, mv_cb)?;
119 let yval = decode_mv_component(br, mv_cb)?;
120 Ok(MV::new(xval, yval))
123 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
124 if is_pb { // as improved pb
126 let pb_mv_add = if is_intra { 1 } else { 0 };
129 let pb_mv_count = 1 - (br.read(1)? as usize);
130 let cbpb = br.read(6)? as u8;
131 Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
133 Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
136 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
139 let mvdb = br.read_bool()?;
140 let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
141 Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
144 Ok(BBlockInfo::new(false, 0, 0, false))
148 impl<'a> BlockDecoder for Intel263BR<'a> {
150 #[allow(unused_variables)]
151 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
152 let br = &mut self.br;
153 let syncw = br.read(22)?;
154 validate!(syncw == 0x000020);
155 let tr = (br.read(8)? << 8) as u16;
157 let id = br.read(1)?;
159 br.read(1)?; // split screen indicator
160 br.read(1)?; // document camera indicator
161 br.read(1)?; // freeze picture release
162 let mut sfmt = br.read(3)?;
163 validate!((sfmt != 0b000) && (sfmt != 0b110));
164 let is_intra = !br.read_bool()?;
165 let umv = br.read_bool()?;
166 br.read(1)?; // syntax arithmetic coding
167 let apm = br.read_bool()?;
168 self.is_pb = br.read_bool()?;
173 validate!((sfmt != 0b000) && (sfmt != 0b111));
174 br.read(2)?; // unknown flags
175 deblock = br.read_bool()?;
176 br.read(1)?; // unknown flag
177 pbplus = br.read_bool()?;
178 br.read(5)?; // unknown flags
179 let marker = br.read(5)?;
180 validate!(marker == 1);
185 self.is_ipb = pbplus;
188 let par = br.read(4)?;
189 w = ((br.read(9)? + 1) * 4) as usize;
191 h = ((br.read(9)? + 1) * 4) as usize;
193 let pixw = br.read(8)?;
194 let pixh = br.read(8)?;
195 validate!((pixw != 0) && (pixh != 0));
198 let (w_, h_) = H263_SIZES[sfmt as usize];
202 let quant = br.read(5)?;
203 let cpm = br.read_bool()?;
208 let trb = br.read(3)?;
209 let dbquant = br.read(2)?;
210 pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
214 while br.read_bool()? { // skip PEI
217 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
219 self.mb_w = (w + 15) >> 4;
221 let ftype = if is_intra { Type::I } else { Type::P };
222 let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
223 let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
224 let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
228 #[allow(unused_variables)]
229 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
230 let br = &mut self.br;
231 let gbsc = br.read(17)?;
232 validate!(gbsc == 1);
233 let gn = br.read(5)?;
234 let gfid = br.read(2)?;
235 let gquant = br.read(5)?;
236 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
237 let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
242 #[allow(unused_variables)]
243 fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
244 let br = &mut self.br;
245 let mut q = slice.get_quant();
246 match info.get_mode() {
248 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
249 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
250 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
251 let cbp = (cbpy << 2) | (cbpc & 3);
252 let dquant = (cbpc & 4) != 0;
254 let idx = br.read(2)? as usize;
255 q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
257 Ok(BlockInfo::new(Type::I, cbp, q))
260 if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
261 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
262 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
263 let is_intra = (cbpc & 0x04) != 0;
264 let dquant = (cbpc & 0x08) != 0;
265 let is_4x4 = (cbpc & 0x10) != 0;
267 let mut mvec: Vec<MV> = Vec::new();
268 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
269 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
270 let cbp = (cbpy << 2) | (cbpc & 3);
272 let idx = br.read(2)? as usize;
273 q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
275 let mut binfo = BlockInfo::new(Type::I, cbp, q);
276 binfo.set_bpart(bbinfo);
278 for _ in 0..bbinfo.get_num_mv() {
279 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
281 binfo.set_b_mv(mvec.as_slice());
286 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
287 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
288 // if /* !aiv && */(cbpc & 3) != 3 {
291 let cbp = (cbpy << 2) | (cbpc & 3);
293 let idx = br.read(2)? as usize;
294 q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
296 let mut binfo = BlockInfo::new(Type::P, cbp, q);
297 binfo.set_bpart(bbinfo);
299 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
302 let mvec: [MV; 4] = [
303 decode_mv(br, &self.tables.mv_cb)?,
304 decode_mv(br, &self.tables.mv_cb)?,
305 decode_mv(br, &self.tables.mv_cb)?,
306 decode_mv(br, &self.tables.mv_cb)?
311 let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
312 for _ in 0..bbinfo.get_num_mv() {
313 let mv = decode_mv(br, &self.tables.mv_cb)?;
316 binfo.set_b_mv(mvec.as_slice());
320 _ => { Err(DecoderError::InvalidData) },
324 #[allow(unused_variables)]
325 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
326 self.decode_block(quant, true, coded, blk)
329 #[allow(unused_variables)]
330 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
331 self.decode_block(quant, false, coded, blk)
334 fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
337 impl Intel263Decoder {
339 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
340 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
341 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
342 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
343 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
344 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
345 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
346 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
347 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
348 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
349 let mut coderead = H263ShortCodeReader::new(H263_MV);
350 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
351 let tables = Tables {
361 info: NACodecInfo::new_dummy(),
362 dec: H263BaseDecoder::new(true),
364 bdsp: H263BlockDSP::new(),
371 impl NADecoder for Intel263Decoder {
372 fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
373 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
374 let w = vinfo.get_width();
375 let h = vinfo.get_height();
376 let fmt = formats::YUV420_FORMAT;
377 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
378 self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
381 Err(DecoderError::InvalidData)
384 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
385 let src = pkt.get_buffer();
390 if self.lastframe.is_none() {
391 buftype = NABufferType::None;
392 ftype = FrameType::Skip;
395 std::mem::swap(&mut self.lastframe, &mut buf);
396 buftype = buf.unwrap();
397 ftype = FrameType::B;
399 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
400 frm.set_keyframe(false);
401 frm.set_frame_type(ftype);
402 if self.lastpts.is_some() {
403 frm.set_pts(self.lastpts);
406 return Ok(frm.into_ref());
408 let mut ibr = Intel263BR::new(&src, &self.tables);
410 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
412 let mut cur_pts = pkt.get_pts();
413 if !self.dec.is_intra() {
414 let bret = self.dec.get_bframe(&self.bdsp);
415 if let Ok(b_buf) = bret {
416 self.lastframe = Some(b_buf);
417 self.lastpts = pkt.get_pts();
418 if let Some(pts) = pkt.get_pts() {
419 cur_pts = Some(pts + 1);
424 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
425 frm.set_keyframe(self.dec.is_intra());
426 frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
427 frm.set_pts(cur_pts);
430 fn flush(&mut self) {
436 pub fn get_decoder() -> Box<dyn NADecoder + Send> {
437 Box::new(Intel263Decoder::new())
442 use nihav_core::codecs::RegisteredDecoders;
443 use nihav_core::demuxers::RegisteredDemuxers;
444 use nihav_codec_support::test::dec_video::*;
445 use crate::indeo_register_all_codecs;
446 use nihav_commonfmt::generic_register_all_demuxers;
449 let mut dmx_reg = RegisteredDemuxers::new();
450 generic_register_all_demuxers(&mut dmx_reg);
451 let mut dec_reg = RegisteredDecoders::new();
452 indeo_register_all_codecs(&mut dec_reg);
454 test_file_decoding("avi", "assets/Indeo/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/, &dmx_reg, &dec_reg);