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 {
29 struct Intel263BR<'a> {
38 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
39 let mark = br.read(1)?;
44 impl<'a> Intel263BR<'a> {
45 fn new(src: &'a [u8], tables: &'a Tables) -> Self {
47 br: BitReader::new(src, BitReaderMode::BE),
56 fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
57 let br = &mut self.br;
60 let mut dc = br.read(8)?;
61 if dc == 255 { dc = 128; }
62 blk[0] = (dc as i16) << 3;
65 if !coded { return Ok(()); }
67 let rl_cb = &self.tables.rl_cb; // could be aic too
68 let q_add = if quant == 0 { 0i16 } else { i16::from((quant - 1) | 1) };
69 let q = i16::from(quant * 2);
71 let code = br.read_cb(rl_cb)?;
75 if !code.is_escape() {
77 level = code.get_level();
78 last = code.is_last();
79 if br.read_bool()? { level = -level; }
80 level = (level * q) + q_add;
82 last = br.read_bool()?;
83 run = br.read(6)? as u8;
84 level = br.read_s(8)? as i16;
86 let low = br.read(5)? as i16;
87 let top = br.read_s(6)? as i16;
88 level = (top << 5) | low;
90 level = (level * q) + q_add;
91 if level < -2048 { level = -2048; }
92 if level > 2047 { level = 2047; }
96 let oidx = ZIGZAG[idx as usize];
105 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
106 let code = i16::from(br.read_cb(mv_cb)?);
107 if code == 0 { return Ok(0) }
108 if !br.read_bool()? {
115 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
116 let xval = decode_mv_component(br, mv_cb)?;
117 let yval = decode_mv_component(br, mv_cb)?;
118 Ok(MV::new(xval, yval))
121 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
122 if is_pb { // as improved pb
124 let pb_mv_add = if is_intra { 1 } else { 0 };
127 let pb_mv_count = 1 - (br.read(1)? as usize);
128 let cbpb = br.read(6)? as u8;
129 Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
131 Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
134 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
137 let mvdb = br.read_bool()?;
138 let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
139 Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
142 Ok(BBlockInfo::new(false, 0, 0, false))
146 impl<'a> BlockDecoder for Intel263BR<'a> {
148 #[allow(unused_variables)]
149 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
150 let br = &mut self.br;
151 let syncw = br.read(22)?;
152 validate!(syncw == 0x000020);
153 let tr = (br.read(8)? << 8) as u16;
155 let id = br.read(1)?;
157 br.read(1)?; // split screen indicator
158 br.read(1)?; // document camera indicator
159 br.read(1)?; // freeze picture release
160 let mut sfmt = br.read(3)?;
161 validate!((sfmt != 0b000) && (sfmt != 0b110));
162 let is_intra = !br.read_bool()?;
163 let umv = br.read_bool()?;
164 br.read(1)?; // syntax arithmetic coding
165 let apm = br.read_bool()?;
166 self.is_pb = br.read_bool()?;
171 validate!((sfmt != 0b000) && (sfmt != 0b111));
172 br.read(2)?; // unknown flags
173 deblock = br.read_bool()?;
174 br.read(1)?; // unknown flag
175 pbplus = br.read_bool()?;
176 br.read(5)?; // unknown flags
177 let marker = br.read(5)?;
178 validate!(marker == 1);
183 self.is_ipb = pbplus;
186 let par = br.read(4)?;
187 w = ((br.read(9)? + 1) * 4) as usize;
189 h = ((br.read(9)? + 1) * 4) as usize;
191 let pixw = br.read(8)?;
192 let pixh = br.read(8)?;
193 validate!((pixw != 0) && (pixh != 0));
196 let (w_, h_) = H263_SIZES[sfmt as usize];
200 let quant = br.read(5)?;
201 let cpm = br.read_bool()?;
206 let trb = br.read(3)?;
207 let dbquant = br.read(2)?;
208 pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
212 while br.read_bool()? { // skip PEI
215 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
217 self.mb_w = (w + 15) >> 4;
219 let ftype = if is_intra { Type::I } else { Type::P };
220 let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
221 let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
222 let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
226 #[allow(unused_variables)]
227 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
228 let br = &mut self.br;
229 let gbsc = br.read(17)?;
230 validate!(gbsc == 1);
231 let gn = br.read(5)?;
232 let gfid = br.read(2)?;
233 let gquant = br.read(5)?;
234 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
235 let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
240 #[allow(unused_variables)]
241 fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
242 let br = &mut self.br;
243 let mut q = slice.get_quant();
244 match info.get_mode() {
246 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
247 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
248 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
249 let cbp = (cbpy << 2) | (cbpc & 3);
250 let dquant = (cbpc & 4) != 0;
252 let idx = br.read(2)? as usize;
253 q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
255 Ok(BlockInfo::new(Type::I, cbp, q))
258 if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
259 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
260 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
261 let is_intra = (cbpc & 0x04) != 0;
262 let dquant = (cbpc & 0x08) != 0;
263 let is_4x4 = (cbpc & 0x10) != 0;
265 let mut mvec: Vec<MV> = Vec::new();
266 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
267 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
268 let cbp = (cbpy << 2) | (cbpc & 3);
270 let idx = br.read(2)? as usize;
271 q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
273 let mut binfo = BlockInfo::new(Type::I, cbp, q);
274 binfo.set_bpart(bbinfo);
276 for _ in 0..bbinfo.get_num_mv() {
277 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
279 binfo.set_b_mv(mvec.as_slice());
284 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
285 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
286 // if /* !aiv && */(cbpc & 3) != 3 {
289 let cbp = (cbpy << 2) | (cbpc & 3);
291 let idx = br.read(2)? as usize;
292 q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
294 let mut binfo = BlockInfo::new(Type::P, cbp, q);
295 binfo.set_bpart(bbinfo);
297 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
300 let mvec: [MV; 4] = [
301 decode_mv(br, &self.tables.mv_cb)?,
302 decode_mv(br, &self.tables.mv_cb)?,
303 decode_mv(br, &self.tables.mv_cb)?,
304 decode_mv(br, &self.tables.mv_cb)?
309 let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
310 for _ in 0..bbinfo.get_num_mv() {
311 let mv = decode_mv(br, &self.tables.mv_cb)?;
314 binfo.set_b_mv(mvec.as_slice());
318 _ => { Err(DecoderError::InvalidData) },
322 #[allow(unused_variables)]
323 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
324 self.decode_block(quant, true, coded, blk)
327 #[allow(unused_variables)]
328 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
329 self.decode_block(quant, false, coded, blk)
332 fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
335 impl Intel263Decoder {
337 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
338 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
339 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
340 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
341 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
342 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
343 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
344 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
345 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
346 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
347 let mut coderead = H263ShortCodeReader::new(H263_MV);
348 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
349 let tables = Tables {
359 info: NACodecInfo::new_dummy(),
360 dec: H263BaseDecoder::new(true),
362 bdsp: H263BlockDSP::new(),
367 impl NADecoder for Intel263Decoder {
368 fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
369 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
370 let w = vinfo.get_width();
371 let h = vinfo.get_height();
372 let fmt = formats::YUV420_FORMAT;
373 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
374 self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
377 Err(DecoderError::InvalidData)
380 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
381 let src = pkt.get_buffer();
384 let bret = self.dec.get_bframe(&self.bdsp);
387 if let Ok(btype) = bret {
391 buftype = NABufferType::None;
394 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
395 frm.set_keyframe(false);
396 frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
397 return Ok(frm.into_ref());
399 let mut ibr = Intel263BR::new(&src, &self.tables);
401 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
403 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
404 frm.set_keyframe(self.dec.is_intra());
405 frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
408 fn flush(&mut self) {
414 pub fn get_decoder() -> Box<dyn NADecoder + Send> {
415 Box::new(Intel263Decoder::new())
420 use nihav_core::codecs::RegisteredDecoders;
421 use nihav_core::demuxers::RegisteredDemuxers;
422 use nihav_codec_support::test::dec_video::*;
423 use crate::indeo_register_all_codecs;
424 use nihav_commonfmt::generic_register_all_demuxers;
427 let mut dmx_reg = RegisteredDemuxers::new();
428 generic_register_all_demuxers(&mut dmx_reg);
429 let mut dec_reg = RegisteredDecoders::new();
430 indeo_register_all_codecs(&mut dec_reg);
432 test_file_decoding("avi", "assets/Indeo/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/, &dmx_reg, &dec_reg);