6 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>,
28 struct RealVideo20Decoder {
29 info: Rc<NACodecInfo>,
39 struct RealVideo20BR<'a> {
54 struct RV20SliceInfo {
65 fn new(ftype: Type, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self {
66 RV20SliceInfo { ftype: ftype, qscale: qscale, mb_x: mb_x, mb_y: mb_y, mb_pos: mb_pos, w: w, h: h }
70 impl<'a> RealVideo20BR<'a> {
71 fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self {
72 let nslices = (src[0] as usize) + 1;
73 let mut slice_offs = Vec::with_capacity(nslices);
75 let offs = &src[1..][..nslices * 8];
76 let mut br = BitReader::new(offs, offs.len(), BitReaderMode::BE);
79 let off = br.read(32).unwrap();
83 let soff = nslices * 8 + 1;
84 let mb_w = (width + 15) >> 4;
85 let mb_h = (height + 15) >> 4;
86 let max_pos = mb_w * mb_h - 1;
88 for i in 0..H263_MBB.len() {
89 if max_pos <= H263_MBB[i].blocks {
90 mbpb = H263_MBB[i].bits;
95 br: BitReader::new(&src[soff..], src.len() - soff, BitReaderMode::BE),
99 slice_off: slice_offs,
105 minor_ver: minor_ver,
110 #[allow(unused_variables)]
111 fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize) -> DecoderResult<()> {
112 let mut br = &mut self.br;
114 if !sstate.is_iframe && intra {
115 let mut dc = br.read(8).unwrap() as i16;
116 if dc == 255 { dc = 128; }
120 if !coded { return Ok(()); }
122 let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
123 let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 };
124 let q = (quant * 2) as i16;
126 let code = br.read_cb(rl_cb).unwrap();
130 if !code.is_escape() {
131 run = code.get_run();
132 level = code.get_level();
133 last = code.is_last();
134 if br.read_bool().unwrap() { level = -level; }
135 level = (level * q) + q_add;
137 last = br.read_bool().unwrap();
138 run = br.read(6).unwrap() as u8;
139 level = br.read_s(8).unwrap() as i16;
141 let low = br.read(5).unwrap() as i16;
142 let top = br.read_s(6).unwrap() as i16;
143 level = (top << 5) | low;
145 level = (level * q) + q_add;
146 if level < -2048 { level = -2048; }
147 if level > 2047 { level = 2047; }
151 let oidx = H263_ZIGZAG[idx as usize];
160 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
161 let code = br.read_cb(mv_cb).unwrap() as i16;
162 if code == 0 { return Ok(0) }
163 if !br.read_bool().unwrap() {
170 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
171 let xval = decode_mv_component(br, mv_cb).unwrap();
172 let yval = decode_mv_component(br, mv_cb).unwrap();
173 //println!(" MV {},{} @ {}", xval, yval, br.tell());
174 Ok(MV::new(xval, yval))
177 impl<'a> BlockDecoder for RealVideo20BR<'a> {
179 #[allow(unused_variables)]
180 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
182 println!("decoding picture header size {}", if self.num_slices > 1 { self.slice_off[1] } else { ((self.br.tell() as u32) + (self.br.left() as u32))/8 });
183 let shdr = self.read_slice_header().unwrap();
184 println!("slice ends @ {}\n", self.br.tell());
185 // self.slice_no += 1;
186 validate!((shdr.mb_x == 0) && (shdr.mb_y == 0));
188 if self.slice_no < self.num_slices {
189 let pos = self.br.tell();
190 let shdr2 = self.read_slice_header().unwrap();
191 self.br.seek(pos as u32)?;
192 mb_count = shdr2.mb_pos - shdr.mb_pos;
194 mb_count = self.mb_w * self.mb_h;
197 let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, false, false, shdr.qscale, 0, None, None);
201 #[allow(unused_variables)]
202 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
203 //println!("read slice {} header", self.slice_no);
204 let shdr = self.read_slice_header().unwrap();
207 if self.slice_no < self.num_slices {
208 let shdr2 = self.read_slice_header().unwrap();
209 mb_count = shdr2.mb_pos - shdr.mb_pos;
211 mb_count = self.mb_w * self.mb_h - shdr.mb_pos;
213 let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale);
218 fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
219 let mut br = &mut self.br;
220 let mut q = slice.get_quant();
221 match info.get_mode() {
223 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb).unwrap();
224 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb).unwrap(); }
225 if sstate.is_iframe {
226 let acpred = br.read_bool()?;
227 println!(" acp {} @ {}", acpred, br.tell());
229 br.skip(1)?;//pred direction
232 let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
233 let cbp = (cbpy << 2) | (cbpc & 3);
234 let dquant = (cbpc & 4) != 0;
236 let idx = br.read(2).unwrap() as usize;
237 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
239 println!(" MB {},{} CBP {:X} @ {}", sstate.mb_x, sstate.mb_y, cbp, br.tell());
240 Ok(BlockInfo::new(Type::I, cbp, q))
243 if br.read_bool().unwrap() {
244 return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
246 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap();
247 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap(); }
248 let is_intra = (cbpc & 0x04) != 0;
249 let dquant = (cbpc & 0x08) != 0;
250 let is_4x4 = (cbpc & 0x10) != 0;
252 let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
253 let cbp = (cbpy << 2) | (cbpc & 3);
255 let idx = br.read(2).unwrap() as usize;
256 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
258 let binfo = BlockInfo::new(Type::I, cbp, q);
262 let mut cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
263 // if /* !aiv && */(cbpc & 3) != 3 {
266 let cbp = (cbpy << 2) | (cbpc & 3);
268 let idx = br.read(2).unwrap() as usize;
269 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
271 println!(" MB {}.{} cbp = {:X}", sstate.mb_x, sstate.mb_y, cbp);
272 let mut binfo = BlockInfo::new(Type::P, cbp, q);
274 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb).unwrap()];
277 let mvec: [MV; 4] = [
278 decode_mv(br, &self.tables.mv_cb).unwrap(),
279 decode_mv(br, &self.tables.mv_cb).unwrap(),
280 decode_mv(br, &self.tables.mv_cb).unwrap(),
281 decode_mv(br, &self.tables.mv_cb).unwrap()
287 _ => { println!("wrong info mode"); Err(DecoderError::InvalidData) },
291 #[allow(unused_variables)]
292 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
293 self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 })
296 #[allow(unused_variables)]
297 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
298 self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 })
301 fn is_slice_end(&mut self) -> bool { false }
303 fn is_gob(&mut self) -> bool { false }
306 impl<'a> RealVideo20BR<'a> {
307 #[allow(unused_variables)]
308 fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> {
309 validate!(self.slice_no < self.num_slices);
311 let mut br = &mut self.br;
312 br.seek(self.slice_off[self.slice_no] * 8).unwrap();
313 //println!(" slice at off {}", br.tell());
315 let frm_type = br.read(2).unwrap();
316 let ftype = match frm_type {
317 0 | 1 => { Type::I },
322 let marker = br.read(1).unwrap();
323 validate!(marker == 0);
324 let qscale = br.read(5).unwrap() as u8;
325 validate!(qscale > 0);
326 if self.minor_ver >= 2 {
327 br.skip(1).unwrap(); // loop filter
329 let seq = if self.minor_ver <= 1 {
330 br.read(8).unwrap() << 7
332 br.read(13).unwrap() << 2
336 if self.rpr.present {
337 let rpr = br.read(self.rpr.bits).unwrap() as usize;
342 w = self.rpr.widths[rpr];
343 h = self.rpr.heights[rpr];
344 validate!((w != 0) && (h != 0));
351 let mb_pos = br.read(self.mb_pos_bits).unwrap() as usize;
352 let mb_x = mb_pos % self.mb_w;
353 let mb_y = mb_pos / self.mb_w;
355 br.skip(1).unwrap(); // no rounding
357 if (self.minor_ver <= 1) && (frm_type == 3) {
360 println!("slice q {} mb {},{}", qscale, mb_x, mb_y);
362 Ok(RV20SliceInfo::new(ftype, qscale, mb_x, mb_y, mb_pos, w, h))
366 impl RealVideo20Decoder {
368 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
369 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
370 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
371 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
372 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
373 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
374 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
375 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
376 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
377 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
378 let mut coderead = H263ShortCodeReader::new(H263_MV);
379 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
381 let tables = Tables {
382 intra_mcbpc_cb: intra_mcbpc_cb,
383 inter_mcbpc_cb: inter_mcbpc_cb,
386 aic_rl_cb: aic_rl_cb,
391 info: Rc::new(DUMMY_CODEC_INFO),
392 dec: H263BaseDecoder::new(),
397 rpr: RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
398 bdsp: H263BlockDSP::new(),
403 impl NADecoder for RealVideo20Decoder {
404 #[allow(unused_variables)]
405 fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
406 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
407 let w = vinfo.get_width();
408 let h = vinfo.get_height();
409 let fmt = formats::YUV420_FORMAT;
410 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
411 self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
415 let edata = info.get_extradata().unwrap();
416 let src: &[u8] = &edata;
417 let ver = ((src[4] as u32) << 12) | ((src[5] as u32) << 4) | ((src[6] as u32) >> 4);
418 let maj_ver = ver >> 16;
419 let min_ver = (ver >> 8) & 0xFF;
420 let mic_ver = ver & 0xFF;
421 println!("ver {:06X}", ver);
422 validate!(maj_ver == 2);
423 self.minor_ver = min_ver as u8;
424 let rprb = src[1] & 7;
426 self.rpr.present = false;
428 self.rpr.present = true;
429 self.rpr.bits = rprb as u8;
430 for i in 4..(src.len()/2) {
431 self.rpr.widths [i - 4] = (src[i * 2] as usize) * 4;
432 self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4;
437 println!(".unwrap().unwrap().unwrap()");
438 Err(DecoderError::InvalidData)
441 fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
442 let src = pkt.get_buffer();
444 println!(" decode frame size {}, {} slices", src.len(), src[0]+1);
445 let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr);
447 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp).unwrap();
449 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
450 frm.set_keyframe(self.dec.is_intra());
451 frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
452 Ok(Rc::new(RefCell::new(frm)))
456 struct MBB { blocks: usize, bits: u8 }
457 const H263_MBB: &[MBB; 7] = &[
458 MBB{ blocks: 47, bits: 6 },
459 MBB{ blocks: 98, bits: 7 },
460 MBB{ blocks: 395, bits: 9 },
461 MBB{ blocks: 1583, bits: 11 },
462 MBB{ blocks: 6335, bits: 13 },
463 MBB{ blocks: 9215, bits: 14 },
464 MBB{ blocks: 65536, bits: 14 },
467 pub fn get_decoder() -> Box<NADecoder> {
468 Box::new(RealVideo20Decoder::new())
473 use test::dec_video::test_file_decoding;
476 test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(160), true, false, Some("rv20"));