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_core::codecs::h263::*;
7 use nihav_core::codecs::h263::decoder::*;
8 use nihav_core::codecs::h263::data::*;
9 use nihav_core::codecs::h263::code::H263BlockDSP;
13 intra_mcbpc_cb: Codebook<u8>,
14 inter_mcbpc_cb: Codebook<u8>,
15 cbpy_cb: Codebook<u8>,
16 rl_cb: Codebook<H263RLSym>,
17 aic_rl_cb: Codebook<H263RLSym>,
21 struct Intel263Decoder {
28 struct Intel263BR<'a> {
37 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
38 let mark = br.read(1)?;
43 impl<'a> Intel263BR<'a> {
44 fn new(src: &'a [u8], tables: &'a Tables) -> Self {
46 br: BitReader::new(src, src.len(), BitReaderMode::BE),
55 fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
56 let br = &mut self.br;
59 let mut dc = br.read(8)?;
60 if dc == 255 { dc = 128; }
61 blk[0] = (dc as i16) << 3;
64 if !coded { return Ok(()); }
66 let rl_cb = &self.tables.rl_cb; // could be aic too
67 let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 };
68 let q = (quant * 2) as i16;
70 let code = br.read_cb(rl_cb)?;
74 if !code.is_escape() {
76 level = code.get_level();
77 last = code.is_last();
78 if br.read_bool()? { level = -level; }
79 level = (level * q) + q_add;
81 last = br.read_bool()?;
82 run = br.read(6)? as u8;
83 level = br.read_s(8)? as i16;
85 let low = br.read(5)? as i16;
86 let top = br.read_s(6)? as i16;
87 level = (top << 5) | low;
89 level = (level * q) + q_add;
90 if level < -2048 { level = -2048; }
91 if level > 2047 { level = 2047; }
95 let oidx = H263_ZIGZAG[idx as usize];
104 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
105 let code = br.read_cb(mv_cb)? as i16;
106 if code == 0 { return Ok(0) }
107 if !br.read_bool()? {
114 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
115 let xval = decode_mv_component(br, mv_cb)?;
116 let yval = decode_mv_component(br, mv_cb)?;
117 Ok(MV::new(xval, yval))
120 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
121 if is_pb { // as improved pb
123 let pb_mv_add = if is_intra { 1 } else { 0 };
126 let pb_mv_count = 1 - (br.read(1)? as usize);
127 let cbpb = br.read(6)? as u8;
128 Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
130 Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
133 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
136 let mvdb = br.read_bool()?;
137 let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
138 Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
141 Ok(BBlockInfo::new(false, 0, 0, false))
145 impl<'a> BlockDecoder for Intel263BR<'a> {
147 #[allow(unused_variables)]
148 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
149 let br = &mut self.br;
150 let syncw = br.read(22)?;
151 validate!(syncw == 0x000020);
152 let tr = (br.read(8)? << 8) as u16;
154 let id = br.read(1)?;
156 br.read(1)?; // split screen indicator
157 br.read(1)?; // document camera indicator
158 br.read(1)?; // freeze picture release
159 let mut sfmt = br.read(3)?;
160 validate!((sfmt != 0b000) && (sfmt != 0b110));
161 let is_intra = !br.read_bool()?;
162 let umv = br.read_bool()?;
163 br.read(1)?; // syntax arithmetic coding
164 let apm = br.read_bool()?;
165 self.is_pb = br.read_bool()?;
170 validate!((sfmt != 0b000) && (sfmt != 0b111));
171 br.read(2)?; // unknown flags
172 deblock = br.read_bool()?;
173 br.read(1)?; // unknown flag
174 pbplus = br.read_bool()?;
175 br.read(5)?; // unknown flags
176 let marker = br.read(5)?;
177 validate!(marker == 1);
182 self.is_ipb = pbplus;
185 let par = br.read(4)?;
186 w = ((br.read(9)? + 1) * 4) as usize;
188 h = ((br.read(9)? + 1) * 4) as usize;
190 let pixw = br.read(8)?;
191 let pixh = br.read(8)?;
192 validate!((pixw != 0) && (pixh != 0));
195 let (w_, h_) = H263_SIZES[sfmt as usize];
199 let quant = br.read(5)?;
200 let cpm = br.read_bool()?;
205 let trb = br.read(3)?;
206 let dbquant = br.read(2)?;
207 pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
211 while br.read_bool()? { // skip PEI
214 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
216 self.mb_w = (w + 15) >> 4;
218 let ftype = if is_intra { Type::I } else { Type::P };
219 let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
220 let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
221 let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
225 #[allow(unused_variables)]
226 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
227 let br = &mut self.br;
228 let gbsc = br.read(17)?;
229 validate!(gbsc == 1);
230 let gn = br.read(5)?;
231 let gfid = br.read(2)?;
232 let gquant = br.read(5)?;
233 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
234 let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
239 #[allow(unused_variables)]
240 fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
241 let br = &mut self.br;
242 let mut q = slice.get_quant();
243 match info.get_mode() {
245 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
246 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
247 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
248 let cbp = (cbpy << 2) | (cbpc & 3);
249 let dquant = (cbpc & 4) != 0;
251 let idx = br.read(2)? as usize;
252 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
254 Ok(BlockInfo::new(Type::I, cbp, q))
257 if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
258 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
259 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
260 let is_intra = (cbpc & 0x04) != 0;
261 let dquant = (cbpc & 0x08) != 0;
262 let is_4x4 = (cbpc & 0x10) != 0;
264 let mut mvec: Vec<MV> = Vec::new();
265 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
266 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
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::I, cbp, q);
273 binfo.set_bpart(bbinfo);
275 for _ in 0..bbinfo.get_num_mv() {
276 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
278 binfo.set_b_mv(mvec.as_slice());
283 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
284 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
285 // if /* !aiv && */(cbpc & 3) != 3 {
288 let cbp = (cbpy << 2) | (cbpc & 3);
290 let idx = br.read(2)? as usize;
291 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
293 let mut binfo = BlockInfo::new(Type::P, cbp, q);
294 binfo.set_bpart(bbinfo);
296 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
299 let mvec: [MV; 4] = [
300 decode_mv(br, &self.tables.mv_cb)?,
301 decode_mv(br, &self.tables.mv_cb)?,
302 decode_mv(br, &self.tables.mv_cb)?,
303 decode_mv(br, &self.tables.mv_cb)?
308 let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
309 for _ in 0..bbinfo.get_num_mv() {
310 let mv = decode_mv(br, &self.tables.mv_cb)?;
313 binfo.set_b_mv(mvec.as_slice());
317 _ => { Err(DecoderError::InvalidData) },
321 #[allow(unused_variables)]
322 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
323 self.decode_block(quant, true, coded, blk)
326 #[allow(unused_variables)]
327 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
328 self.decode_block(quant, false, coded, blk)
331 fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
334 impl Intel263Decoder {
336 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
337 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
338 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
339 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
340 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
341 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
342 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
343 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
344 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
345 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
346 let mut coderead = H263ShortCodeReader::new(H263_MV);
347 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
348 let tables = Tables {
349 intra_mcbpc_cb: intra_mcbpc_cb,
350 inter_mcbpc_cb: inter_mcbpc_cb,
353 aic_rl_cb: aic_rl_cb,
358 info: NACodecInfo::new_dummy(),
359 dec: H263BaseDecoder::new(true),
361 bdsp: H263BlockDSP::new(),
366 impl NADecoder for Intel263Decoder {
367 fn init(&mut self, info: NACodecInfoRef) -> DecoderResult<()> {
368 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
369 let w = vinfo.get_width();
370 let h = vinfo.get_height();
371 let fmt = formats::YUV420_FORMAT;
372 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
373 self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
376 Err(DecoderError::InvalidData)
379 fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
380 let src = pkt.get_buffer();
383 let bret = self.dec.get_bframe(&self.bdsp);
386 if let Ok(btype) = bret {
390 buftype = NABufferType::None;
393 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
394 frm.set_keyframe(false);
395 frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
396 return Ok(frm.into_ref());
398 let mut ibr = Intel263BR::new(&src, &self.tables);
400 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
402 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
403 frm.set_keyframe(self.dec.is_intra());
404 frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
410 pub fn get_decoder() -> Box<NADecoder> {
411 Box::new(Intel263Decoder::new())
416 use nihav_core::codecs::RegisteredDecoders;
417 use nihav_core::demuxers::RegisteredDemuxers;
418 use nihav_core::test::dec_video::*;
419 use crate::codecs::indeo_register_all_codecs;
420 use nihav_commonfmt::demuxers::generic_register_all_demuxers;
423 let mut dmx_reg = RegisteredDemuxers::new();
424 generic_register_all_demuxers(&mut dmx_reg);
425 let mut dec_reg = RegisteredDecoders::new();
426 indeo_register_all_codecs(&mut dec_reg);
428 test_file_decoding("avi", "assets/Indeo/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/, &dmx_reg, &dec_reg);