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, acpred: ACPredMode) -> 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(()); }
121 let scan = match acpred {
122 ACPredMode::Hor => H263_SCAN_V,
123 ACPredMode::Ver => H263_SCAN_H,
127 let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
128 let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 };
129 let q = (quant * 2) as i16;
131 let code = br.read_cb(rl_cb).unwrap();
135 if !code.is_escape() {
136 run = code.get_run();
137 level = code.get_level();
138 last = code.is_last();
139 if br.read_bool().unwrap() { level = -level; }
140 level = (level * q) + q_add;
142 last = br.read_bool().unwrap();
143 run = br.read(6).unwrap() as u8;
144 level = br.read_s(8).unwrap() as i16;
146 let low = br.read(5).unwrap() as i16;
147 let top = br.read_s(6).unwrap() as i16;
148 level = (top << 5) | low;
150 level = (level * q) + q_add;
151 if level < -2048 { level = -2048; }
152 if level > 2047 { level = 2047; }
156 let oidx = scan[idx as usize];
165 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
166 let code = br.read_cb(mv_cb).unwrap() as i16;
167 if code == 0 { return Ok(0) }
168 if !br.read_bool().unwrap() {
175 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
176 let xval = decode_mv_component(br, mv_cb).unwrap();
177 let yval = decode_mv_component(br, mv_cb).unwrap();
178 //println!(" MV {},{} @ {}", xval, yval, br.tell());
179 Ok(MV::new(xval, yval))
182 impl<'a> BlockDecoder for RealVideo20BR<'a> {
184 #[allow(unused_variables)]
185 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
187 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 });
188 let shdr = self.read_slice_header().unwrap();
189 println!("slice ends @ {}\n", self.br.tell());
190 // self.slice_no += 1;
191 validate!((shdr.mb_x == 0) && (shdr.mb_y == 0));
193 if self.slice_no < self.num_slices {
194 let pos = self.br.tell();
195 let shdr2 = self.read_slice_header().unwrap();
196 self.br.seek(pos as u32)?;
197 mb_count = shdr2.mb_pos - shdr.mb_pos;
199 mb_count = self.mb_w * self.mb_h;
202 let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false));
203 let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, false, false, shdr.qscale, 0, None, plusinfo);
207 #[allow(unused_variables)]
208 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
209 //println!("read slice {} header", self.slice_no);
210 let shdr = self.read_slice_header().unwrap();
213 if self.slice_no < self.num_slices {
214 let pos = self.br.tell();
215 let shdr2 = self.read_slice_header().unwrap();
216 mb_count = shdr2.mb_pos - shdr.mb_pos;
217 self.br.seek(pos as u32)?;
219 mb_count = self.mb_w * self.mb_h - shdr.mb_pos;
221 let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale);
226 fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
227 let mut br = &mut self.br;
228 let mut q = slice.get_quant();
229 match info.get_mode() {
231 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb).unwrap();
232 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb).unwrap(); }
233 let mut acpred = ACPredMode::None;
234 if let Some(ref pi) = info.plusinfo {
236 let acpp = br.read_bool()?;
237 acpred = ACPredMode::DC;
238 println!(" acp {} @ {}", acpp as u8, br.tell());
240 acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver };
243 println!(" @ {}", br.tell());
245 let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
246 let cbp = (cbpy << 2) | (cbpc & 3);
247 let dquant = (cbpc & 4) != 0;
249 let idx = br.read(2).unwrap() as usize;
250 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
252 println!(" MB {},{} CBP {:X} @ {}", sstate.mb_x, sstate.mb_y, cbp, br.tell());
253 let mut binfo = BlockInfo::new(Type::I, cbp, q);
254 binfo.set_acpred(acpred);
258 if br.read_bool().unwrap() {
259 return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
261 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap();
262 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap(); }
263 let is_intra = (cbpc & 0x04) != 0;
264 let dquant = (cbpc & 0x08) != 0;
265 let is_4x4 = (cbpc & 0x10) != 0;
267 let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
268 let cbp = (cbpy << 2) | (cbpc & 3);
270 let idx = br.read(2).unwrap() as usize;
271 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
273 let binfo = BlockInfo::new(Type::I, cbp, q);
277 let mut cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
278 // if /* !aiv && */(cbpc & 3) != 3 {
281 let cbp = (cbpy << 2) | (cbpc & 3);
283 let idx = br.read(2).unwrap() as usize;
284 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
286 println!(" MB {}.{} cbp = {:X}", sstate.mb_x, sstate.mb_y, cbp);
287 let mut binfo = BlockInfo::new(Type::P, cbp, q);
289 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb).unwrap()];
292 let mvec: [MV; 4] = [
293 decode_mv(br, &self.tables.mv_cb).unwrap(),
294 decode_mv(br, &self.tables.mv_cb).unwrap(),
295 decode_mv(br, &self.tables.mv_cb).unwrap(),
296 decode_mv(br, &self.tables.mv_cb).unwrap()
302 _ => { println!("wrong info mode"); Err(DecoderError::InvalidData) },
306 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
307 self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred())
310 #[allow(unused_variables)]
311 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
312 self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None)
315 fn is_slice_end(&mut self) -> bool { false }
317 fn is_gob(&mut self) -> bool { false }
320 impl<'a> RealVideo20BR<'a> {
321 #[allow(unused_variables)]
322 fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> {
323 validate!(self.slice_no < self.num_slices);
325 let mut br = &mut self.br;
326 br.seek(self.slice_off[self.slice_no] * 8).unwrap();
327 //println!(" slice at off {}", br.tell());
329 let frm_type = br.read(2).unwrap();
330 let ftype = match frm_type {
331 0 | 1 => { Type::I },
336 let marker = br.read(1).unwrap();
337 validate!(marker == 0);
338 let qscale = br.read(5).unwrap() as u8;
339 validate!(qscale > 0);
340 if self.minor_ver >= 2 {
341 br.skip(1).unwrap(); // loop filter
343 let seq = if self.minor_ver <= 1 {
344 br.read(8).unwrap() << 7
346 br.read(13).unwrap() << 2
350 if self.rpr.present {
351 let rpr = br.read(self.rpr.bits).unwrap() as usize;
356 w = self.rpr.widths[rpr];
357 h = self.rpr.heights[rpr];
358 validate!((w != 0) && (h != 0));
365 let mb_pos = br.read(self.mb_pos_bits).unwrap() as usize;
366 let mb_x = mb_pos % self.mb_w;
367 let mb_y = mb_pos / self.mb_w;
369 br.skip(1).unwrap(); // no rounding
371 if (self.minor_ver <= 1) && (frm_type == 3) {
374 println!("slice q {} mb {},{}", qscale, mb_x, mb_y);
376 Ok(RV20SliceInfo::new(ftype, qscale, mb_x, mb_y, mb_pos, w, h))
380 impl RealVideo20Decoder {
382 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
383 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
384 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
385 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
386 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
387 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
388 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
389 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
390 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
391 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
392 let mut coderead = H263ShortCodeReader::new(H263_MV);
393 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
395 let tables = Tables {
396 intra_mcbpc_cb: intra_mcbpc_cb,
397 inter_mcbpc_cb: inter_mcbpc_cb,
400 aic_rl_cb: aic_rl_cb,
405 info: Rc::new(DUMMY_CODEC_INFO),
406 dec: H263BaseDecoder::new(),
411 rpr: RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
412 bdsp: H263BlockDSP::new(),
417 impl NADecoder for RealVideo20Decoder {
418 #[allow(unused_variables)]
419 fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
420 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
421 let w = vinfo.get_width();
422 let h = vinfo.get_height();
423 let fmt = formats::YUV420_FORMAT;
424 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
425 self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
429 let edata = info.get_extradata().unwrap();
430 let src: &[u8] = &edata;
431 let ver = ((src[4] as u32) << 12) | ((src[5] as u32) << 4) | ((src[6] as u32) >> 4);
432 let maj_ver = ver >> 16;
433 let min_ver = (ver >> 8) & 0xFF;
434 let mic_ver = ver & 0xFF;
435 println!("ver {:06X}", ver);
436 validate!(maj_ver == 2);
437 self.minor_ver = min_ver as u8;
438 let rprb = src[1] & 7;
440 self.rpr.present = false;
442 self.rpr.present = true;
443 self.rpr.bits = rprb as u8;
444 for i in 4..(src.len()/2) {
445 self.rpr.widths [i - 4] = (src[i * 2] as usize) * 4;
446 self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4;
451 println!(".unwrap().unwrap().unwrap()");
452 Err(DecoderError::InvalidData)
455 fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
456 let src = pkt.get_buffer();
458 println!(" decode frame size {}, {} slices", src.len(), src[0]+1);
459 let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr);
461 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp).unwrap();
463 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
464 frm.set_keyframe(self.dec.is_intra());
465 frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
466 Ok(Rc::new(RefCell::new(frm)))
470 struct MBB { blocks: usize, bits: u8 }
471 const H263_MBB: &[MBB; 7] = &[
472 MBB{ blocks: 47, bits: 6 },
473 MBB{ blocks: 98, bits: 7 },
474 MBB{ blocks: 395, bits: 9 },
475 MBB{ blocks: 1583, bits: 11 },
476 MBB{ blocks: 6335, bits: 13 },
477 MBB{ blocks: 9215, bits: 14 },
478 MBB{ blocks: 65536, bits: 14 },
481 pub fn get_decoder() -> Box<NADecoder> {
482 Box::new(RealVideo20Decoder::new())
487 use test::dec_video::test_file_decoding;
490 test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(1000), true, false, Some("rv20"));