2 use std::cell::RefCell;
3 use nihav_core::io::bitreader::*;
4 use nihav_core::io::codebook::*;
5 use nihav_core::formats;
6 use nihav_core::frame::*;
7 use nihav_core::codecs::*;
8 use nihav_core::codecs::h263::*;
9 use nihav_core::codecs::h263::decoder::*;
10 use nihav_core::codecs::h263::data::*;
11 use nihav_core::codecs::h263::code::H263BlockDSP;
15 intra_mcbpc_cb: Codebook<u8>,
16 inter_mcbpc_cb: Codebook<u8>,
17 cbpy_cb: Codebook<u8>,
18 rl_cb: Codebook<H263RLSym>,
19 aic_rl_cb: Codebook<H263RLSym>,
23 struct Intel263Decoder {
24 info: Rc<NACodecInfo>,
30 struct Intel263BR<'a> {
39 fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
40 let mark = br.read(1)?;
45 impl<'a> Intel263BR<'a> {
46 fn new(src: &'a [u8], tables: &'a Tables) -> Self {
48 br: BitReader::new(src, src.len(), BitReaderMode::BE),
57 fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
58 let br = &mut self.br;
61 let mut dc = br.read(8)?;
62 if dc == 255 { dc = 128; }
63 blk[0] = (dc as i16) << 3;
66 if !coded { return Ok(()); }
68 let rl_cb = &self.tables.rl_cb; // could be aic too
69 let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 };
70 let q = (quant * 2) as i16;
72 let code = br.read_cb(rl_cb)?;
76 if !code.is_escape() {
78 level = code.get_level();
79 last = code.is_last();
80 if br.read_bool()? { level = -level; }
81 level = (level * q) + q_add;
83 last = br.read_bool()?;
84 run = br.read(6)? as u8;
85 level = br.read_s(8)? as i16;
87 let low = br.read(5)? as i16;
88 let top = br.read_s(6)? as i16;
89 level = (top << 5) | low;
91 level = (level * q) + q_add;
92 if level < -2048 { level = -2048; }
93 if level > 2047 { level = 2047; }
97 let oidx = H263_ZIGZAG[idx as usize];
106 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
107 let code = br.read_cb(mv_cb)? as i16;
108 if code == 0 { return Ok(0) }
109 if !br.read_bool()? {
116 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
117 let xval = decode_mv_component(br, mv_cb)?;
118 let yval = decode_mv_component(br, mv_cb)?;
119 Ok(MV::new(xval, yval))
122 fn decode_b_info(br: &mut BitReader, is_pb: bool, is_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
123 if is_pb { // as improved pb
125 let pb_mv_add = if is_intra { 1 } else { 0 };
128 let pb_mv_count = 1 - (br.read(1)? as usize);
129 let cbpb = br.read(6)? as u8;
130 Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
132 Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
135 Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
138 let mvdb = br.read_bool()?;
139 let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
140 Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, false))
143 Ok(BBlockInfo::new(false, 0, 0, false))
147 impl<'a> BlockDecoder for Intel263BR<'a> {
149 #[allow(unused_variables)]
150 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
151 let br = &mut self.br;
152 let syncw = br.read(22)?;
153 validate!(syncw == 0x000020);
154 let tr = (br.read(8)? << 8) as u16;
156 let id = br.read(1)?;
158 br.read(1)?; // split screen indicator
159 br.read(1)?; // document camera indicator
160 br.read(1)?; // freeze picture release
161 let mut sfmt = br.read(3)?;
162 validate!((sfmt != 0b000) && (sfmt != 0b110));
163 let is_intra = !br.read_bool()?;
164 let umv = br.read_bool()?;
165 br.read(1)?; // syntax arithmetic coding
166 let apm = br.read_bool()?;
167 self.is_pb = br.read_bool()?;
172 validate!((sfmt != 0b000) && (sfmt != 0b111));
173 br.read(2)?; // unknown flags
174 deblock = br.read_bool()?;
175 br.read(1)?; // unknown flag
176 pbplus = br.read_bool()?;
177 br.read(5)?; // unknown flags
178 let marker = br.read(5)?;
179 validate!(marker == 1);
184 self.is_ipb = pbplus;
187 let par = br.read(4)?;
188 w = ((br.read(9)? + 1) * 4) as usize;
190 h = ((br.read(9)? + 1) * 4) as usize;
192 let pixw = br.read(8)?;
193 let pixh = br.read(8)?;
194 validate!((pixw != 0) && (pixh != 0));
197 let (w_, h_) = H263_SIZES[sfmt as usize];
201 let quant = br.read(5)?;
202 let cpm = br.read_bool()?;
207 let trb = br.read(3)?;
208 let dbquant = br.read(2)?;
209 pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8, pbplus));
213 while br.read_bool()? { // skip PEI
216 //println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
218 self.mb_w = (w + 15) >> 4;
220 let ftype = if is_intra { Type::I } else { Type::P };
221 let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
222 let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
223 let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
227 #[allow(unused_variables)]
228 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
229 let br = &mut self.br;
230 let gbsc = br.read(17)?;
231 validate!(gbsc == 1);
232 let gn = br.read(5)?;
233 let gfid = br.read(2)?;
234 let gquant = br.read(5)?;
235 //println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
236 let ret = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
241 #[allow(unused_variables)]
242 fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
243 let br = &mut self.br;
244 let mut q = slice.get_quant();
245 match info.get_mode() {
247 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
248 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
249 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
250 let cbp = (cbpy << 2) | (cbpc & 3);
251 let dquant = (cbpc & 4) != 0;
253 let idx = br.read(2)? as usize;
254 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
256 Ok(BlockInfo::new(Type::I, cbp, q))
259 if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
260 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
261 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
262 let is_intra = (cbpc & 0x04) != 0;
263 let dquant = (cbpc & 0x08) != 0;
264 let is_4x4 = (cbpc & 0x10) != 0;
266 let mut mvec: Vec<MV> = Vec::new();
267 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, true)?;
268 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
269 let cbp = (cbpy << 2) | (cbpc & 3);
271 let idx = br.read(2)? as usize;
272 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
274 let mut binfo = BlockInfo::new(Type::I, cbp, q);
275 binfo.set_bpart(bbinfo);
277 for _ in 0..bbinfo.get_num_mv() {
278 mvec.push(decode_mv(br, &self.tables.mv_cb)?);
280 binfo.set_b_mv(mvec.as_slice());
285 let bbinfo = decode_b_info(br, self.is_pb, self.is_ipb, false)?;
286 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
287 // if /* !aiv && */(cbpc & 3) != 3 {
290 let cbp = (cbpy << 2) | (cbpc & 3);
292 let idx = br.read(2)? as usize;
293 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
295 let mut binfo = BlockInfo::new(Type::P, cbp, q);
296 binfo.set_bpart(bbinfo);
298 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
301 let mvec: [MV; 4] = [
302 decode_mv(br, &self.tables.mv_cb)?,
303 decode_mv(br, &self.tables.mv_cb)?,
304 decode_mv(br, &self.tables.mv_cb)?,
305 decode_mv(br, &self.tables.mv_cb)?
310 let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
311 for _ in 0..bbinfo.get_num_mv() {
312 let mv = decode_mv(br, &self.tables.mv_cb)?;
315 binfo.set_b_mv(mvec.as_slice());
319 _ => { Err(DecoderError::InvalidData) },
323 #[allow(unused_variables)]
324 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
325 self.decode_block(quant, true, coded, blk)
328 #[allow(unused_variables)]
329 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
330 self.decode_block(quant, false, coded, blk)
333 fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
336 impl Intel263Decoder {
338 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
339 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
340 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
341 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
342 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
343 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
344 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
345 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
346 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
347 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
348 let mut coderead = H263ShortCodeReader::new(H263_MV);
349 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
350 let tables = Tables {
351 intra_mcbpc_cb: intra_mcbpc_cb,
352 inter_mcbpc_cb: inter_mcbpc_cb,
355 aic_rl_cb: aic_rl_cb,
360 info: Rc::new(DUMMY_CODEC_INFO),
361 dec: H263BaseDecoder::new(true),
363 bdsp: H263BlockDSP::new(),
368 impl NADecoder for Intel263Decoder {
369 fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
370 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
371 let w = vinfo.get_width();
372 let h = vinfo.get_height();
373 let fmt = formats::YUV420_FORMAT;
374 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
375 self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
378 Err(DecoderError::InvalidData)
381 fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
382 let src = pkt.get_buffer();
385 let bret = self.dec.get_bframe(&self.bdsp);
388 if let Ok(btype) = bret {
392 buftype = NABufferType::None;
395 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
396 frm.set_keyframe(false);
397 frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
398 return Ok(Rc::new(RefCell::new(frm)));
400 let mut ibr = Intel263BR::new(&src, &self.tables);
402 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
404 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
405 frm.set_keyframe(self.dec.is_intra());
406 frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
407 Ok(Rc::new(RefCell::new(frm)))
412 pub fn get_decoder() -> Box<NADecoder> {
413 Box::new(Intel263Decoder::new())
418 use nihav_core::codecs::RegisteredDecoders;
419 use nihav_core::demuxers::RegisteredDemuxers;
420 use nihav_core::test::dec_video::*;
421 use crate::codecs::indeo_register_all_codecs;
422 use nihav_commonfmt::demuxers::generic_register_all_demuxers;
425 let mut dmx_reg = RegisteredDemuxers::new();
426 generic_register_all_demuxers(&mut dmx_reg);
427 let mut dec_reg = RegisteredDecoders::new();
428 indeo_register_all_codecs(&mut dec_reg);
430 test_file_decoding("avi", "assets/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/, &dmx_reg, &dec_reg);