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::code::H263BlockDSP;
9 use nihav_codec_support::codecs::h263::decoder::*;
10 use nihav_codec_support::codecs::h263::data::*;
15 intra_mcbpc_cb: Codebook<u8>,
16 inter_mcbpc_cb: Codebook<u8>,
17 mbtype_b_cb: Codebook<u8>,
18 cbpy_cb: Codebook<u8>,
19 cbpc_b_cb: Codebook<u8>,
20 rl_cb: Codebook<H263RLSym>,
21 aic_rl_cb: Codebook<H263RLSym>,
33 struct RealVideo20Decoder {
44 struct RealVideo20BR<'a> {
59 struct RV20SliceInfo {
71 fn new(ftype: Type, seq: u32, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self {
72 RV20SliceInfo { ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h }
76 impl<'a> RealVideo20BR<'a> {
77 fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self {
78 let nslices = (src[0] as usize) + 1;
79 let mut slice_offs = Vec::with_capacity(nslices);
81 let offs = &src[1..][..nslices * 8];
82 let mut br = BitReader::new(offs, BitReaderMode::BE);
85 let off = br.read(32).unwrap();
89 let soff = nslices * 8 + 1;
90 let mb_w = (width + 15) >> 4;
91 let mb_h = (height + 15) >> 4;
92 let max_pos = mb_w * mb_h - 1;
94 for i in 0..H263_MBB.len() {
95 if max_pos <= H263_MBB[i].blocks {
96 mbpb = H263_MBB[i].bits;
101 br: BitReader::new(&src[soff..], BitReaderMode::BE),
105 slice_off: slice_offs,
116 #[allow(unused_variables)]
117 fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize, acpred: ACPredMode) -> DecoderResult<()> {
118 let br = &mut self.br;
120 if !sstate.is_iframe && intra {
121 let mut dc = br.read(8)? as i16;
122 if dc == 255 { dc = 128; }
126 if !coded { return Ok(()); }
127 let scan = match acpred {
128 ACPredMode::Hor => H263_SCAN_V,
129 ACPredMode::Ver => H263_SCAN_H,
133 let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
134 let q_add = if quant == 0 || sstate.is_iframe { 0i16 } else { ((quant - 1) | 1) as i16 };
135 let q = if plane_no == 0 { (quant * 2) as i16 } else { H263_CHROMA_QUANT[quant as usize] as i16 };
137 let code = br.read_cb(rl_cb)?;
141 if !code.is_escape() {
142 run = code.get_run();
143 level = code.get_level();
144 last = code.is_last();
145 if br.read_bool()? { level = -level; }
146 level = (level * q) + q_add;
148 last = br.read_bool()?;
149 run = br.read(6)? as u8;
150 level = br.read_s(8)? as i16;
152 let low = br.read(5)? as i16;
153 let top = br.read_s(6)? as i16;
154 level = (top << 5) | low;
156 level = (level * q) + q_add;
157 if level < -2048 { level = -2048; }
158 if level > 2047 { level = 2047; }
162 let oidx = scan[idx as usize];
171 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
172 let code = br.read_cb(mv_cb)? as i16;
173 if code == 0 { return Ok(0) }
174 if !br.read_bool()? {
181 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
182 let xval = decode_mv_component(br, mv_cb)?;
183 let yval = decode_mv_component(br, mv_cb)?;
184 Ok(MV::new(xval, yval))
187 fn read_dquant(br: &mut BitReader, q: u8) -> DecoderResult<u8> {
189 Ok(H263_MODIFIED_QUANT[br.read(1)? as usize][q as usize])
191 Ok(br.read(5)? as u8)
195 impl<'a> BlockDecoder for RealVideo20BR<'a> {
197 #[allow(unused_variables)]
198 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
200 let shdr = self.read_slice_header()?;
201 // self.slice_no += 1;
202 validate!((shdr.mb_x == 0) && (shdr.mb_y == 0));
204 if self.slice_no < self.num_slices {
205 let pos = self.br.tell();
206 let shdr2 = self.read_slice_header()?;
207 self.br.seek(pos as u32)?;
208 mb_count = shdr2.mb_pos - shdr.mb_pos;
210 mb_count = self.mb_w * self.mb_h;
213 let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false));
214 let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, MVMode::Long, false, false, shdr.qscale, shdr.seq as u16, None, plusinfo);
218 #[allow(unused_variables)]
219 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
220 let shdr = self.read_slice_header()?;
223 if self.slice_no < self.num_slices {
224 let pos = self.br.tell();
225 let shdr2 = self.read_slice_header()?;
226 mb_count = shdr2.mb_pos - shdr.mb_pos;
227 self.br.seek(pos as u32)?;
229 mb_count = self.mb_w * self.mb_h - shdr.mb_pos;
231 let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale);
236 fn decode_block_header(&mut self, info: &PicInfo, _slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
237 let br = &mut self.br;
238 let mut q = sstate.quant;
239 match info.get_mode() {
241 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
242 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
243 let mut acpred = ACPredMode::None;
244 if let Some(ref pi) = info.plusinfo {
246 let acpp = br.read_bool()?;
247 acpred = ACPredMode::DC;
249 acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver };
253 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
254 let cbp = (cbpy << 2) | (cbpc & 3);
255 let dquant = (cbpc & 4) != 0;
257 q = read_dquant(br, q)?;
259 let mut binfo = BlockInfo::new(Type::I, cbp, q);
260 binfo.set_acpred(acpred);
265 return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
267 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
268 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
269 let is_intra = (cbpc & 0x04) != 0;
270 let dquant = (cbpc & 0x08) != 0;
271 let is_4x4 = (cbpc & 0x10) != 0;
273 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
274 let cbp = (cbpy << 2) | (cbpc & 3);
276 q = read_dquant(br, q)?;
278 let binfo = BlockInfo::new(Type::I, cbp, q);
282 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
283 // if /* !aiv && */(cbpc & 3) != 3 {
286 let cbp = (cbpy << 2) | (cbpc & 3);
288 q = read_dquant(br, q)?;
290 let mut binfo = BlockInfo::new(Type::P, cbp, q);
292 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
295 let mvec: [MV; 4] = [
296 decode_mv(br, &self.tables.mv_cb)?,
297 decode_mv(br, &self.tables.mv_cb)?,
298 decode_mv(br, &self.tables.mv_cb)?,
299 decode_mv(br, &self.tables.mv_cb)?
306 let mut mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize;
307 while mbtype == 14 { mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; }
309 let is_coded = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_CODED) != 0;
310 let is_intra = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_INTRA) != 0;
311 let dquant = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_DQUANT) != 0;
312 let is_fwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_FORWARD) != 0;
313 let is_bwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_BACKWARD) != 0;
315 let cbp = if is_coded {
316 let cbpc = br.read_cb(&self.tables.cbpc_b_cb)?;
317 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
318 if !is_intra { cbpy ^= 0xF; }
319 (cbpy << 2) | (cbpc & 3)
323 q = read_dquant(br, q)?;
327 let binfo = BlockInfo::new(Type::I, cbp, q);
331 let mut binfo = BlockInfo::new(Type::B, cbp, q);
333 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
337 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
338 binfo.set_b_mv(&mvec);
342 _ => { unreachable!(); },
346 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
347 self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred())
350 #[allow(unused_variables)]
351 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
352 self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None)
355 fn is_slice_end(&mut self) -> bool { false }
358 impl<'a> RealVideo20BR<'a> {
359 #[allow(unused_variables)]
360 fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> {
361 validate!(self.slice_no < self.num_slices);
363 let br = &mut self.br;
364 br.seek(self.slice_off[self.slice_no] * 8)?;
366 let frm_type = br.read(2)?;
367 let ftype = match frm_type {
368 0 | 1 => { Type::I },
373 let marker = br.read(1)?;
374 validate!(marker == 0);
375 let qscale = br.read(5)? as u8;
376 validate!(qscale > 0);
377 if self.minor_ver >= 2 {
378 br.skip(1)?; // loop filter
380 let seq = if self.minor_ver <= 1 {
387 if self.rpr.present {
388 let rpr = br.read(self.rpr.bits)? as usize;
393 w = self.rpr.widths[rpr - 1];
394 h = self.rpr.heights[rpr - 1];
395 validate!((w != 0) && (h != 0));
402 let mb_pos = br.read(self.mb_pos_bits)? as usize;
403 let mb_x = mb_pos % self.mb_w;
404 let mb_y = mb_pos / self.mb_w;
406 br.skip(1)?; // no rounding
408 if (self.minor_ver <= 1) && (frm_type == 3) {
412 Ok(RV20SliceInfo::new(ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h))
416 impl RealVideo20Decoder {
418 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
419 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
420 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
421 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
422 let mut coderead = H263ShortCodeReader::new(H263_MBTYPE_B);
423 let mbtype_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
424 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
425 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
426 let mut coderead = H263ShortCodeReader::new(H263_CBPC_B);
427 let cbpc_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
428 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
429 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
430 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
431 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
432 let mut coderead = H263ShortCodeReader::new(H263_MV);
433 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
435 let tables = Tables {
447 info: NACodecInfoRef::default(),
448 dec: H263BaseDecoder::new_b_frames(false),
453 rpr: RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
454 bdsp: H263BlockDSP::new(),
459 impl NADecoder for RealVideo20Decoder {
460 #[allow(unused_variables)]
461 fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
462 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
463 let w = vinfo.get_width();
464 let h = vinfo.get_height();
465 let fmt = formats::YUV420_FORMAT;
466 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
467 self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
471 let edata = info.get_extradata().unwrap();
472 let src: &[u8] = &edata;
473 let ver = ((src[4] as u32) << 12) | ((src[5] as u32) << 4) | ((src[6] as u32) >> 4);
474 let maj_ver = ver >> 16;
475 let min_ver = (ver >> 8) & 0xFF;
476 let mic_ver = ver & 0xFF;
477 validate!(maj_ver == 2);
478 self.minor_ver = min_ver as u8;
479 let rprb = src[1] & 7;
481 self.rpr.present = false;
483 self.rpr.present = true;
484 self.rpr.bits = ((rprb >> 1) + 1) as u8;
485 for i in 4..(src.len()/2) {
486 self.rpr.widths [i - 4] = (src[i * 2] as usize) * 4;
487 self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4;
492 Err(DecoderError::InvalidData)
495 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
496 let src = pkt.get_buffer();
498 let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr);
500 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
502 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
503 frm.set_keyframe(self.dec.is_intra());
504 frm.set_frame_type(self.dec.get_frame_type());
507 fn flush(&mut self) {
512 struct MBB { blocks: usize, bits: u8 }
513 const H263_MBB: &[MBB; 7] = &[
514 MBB{ blocks: 47, bits: 6 },
515 MBB{ blocks: 98, bits: 7 },
516 MBB{ blocks: 395, bits: 9 },
517 MBB{ blocks: 1583, bits: 11 },
518 MBB{ blocks: 6335, bits: 13 },
519 MBB{ blocks: 9215, bits: 14 },
520 MBB{ blocks: 65536, bits: 14 },
523 pub fn get_decoder() -> Box<dyn NADecoder + Send> {
524 Box::new(RealVideo20Decoder::new())
529 use nihav_core::codecs::RegisteredDecoders;
530 use nihav_core::demuxers::RegisteredDemuxers;
531 use nihav_codec_support::test::dec_video::*;
532 use crate::realmedia_register_all_codecs;
533 use crate::realmedia_register_all_demuxers;
536 let mut dmx_reg = RegisteredDemuxers::new();
537 realmedia_register_all_demuxers(&mut dmx_reg);
538 let mut dec_reg = RegisteredDecoders::new();
539 realmedia_register_all_codecs(&mut dec_reg);
541 test_file_decoding("realmedia", "assets/RV/rv20_svt_atrc_640x352_realproducer_plus_8.51.rm", /*None*/Some(3000), true, false, None/*Some("rv20")*/, &dmx_reg, &dec_reg);
542 // test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(1000), true, false, Some("rv20"));