]> git.nihav.org Git - nihav.git/blame - nihav-realmedia/src/codecs/rv20.rs
add flush() to decoder interface
[nihav.git] / nihav-realmedia / src / codecs / rv20.rs
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1use nihav_core::io::bitreader::*;
2use nihav_core::io::codebook::*;
3use nihav_core::formats;
4use nihav_core::frame::*;
5use nihav_core::codecs::*;
6use nihav_core::codecs::h263::*;
7use nihav_core::codecs::h263::code::H263BlockDSP;
8use nihav_core::codecs::h263::decoder::*;
9use nihav_core::codecs::h263::data::*;
10
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11
12#[allow(dead_code)]
13struct Tables {
14 intra_mcbpc_cb: Codebook<u8>,
15 inter_mcbpc_cb: Codebook<u8>,
507f4b11 16 mbtype_b_cb: Codebook<u8>,
be91b1c3 17 cbpy_cb: Codebook<u8>,
507f4b11 18 cbpc_b_cb: Codebook<u8>,
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19 rl_cb: Codebook<H263RLSym>,
20 aic_rl_cb: Codebook<H263RLSym>,
21 mv_cb: Codebook<u8>,
22}
23
24#[derive(Clone,Copy)]
25struct RPRInfo {
26 present: bool,
27 bits: u8,
28 widths: [usize; 8],
29 heights: [usize; 8],
30}
31
32struct RealVideo20Decoder {
2422d969 33 info: NACodecInfoRef,
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34 dec: H263BaseDecoder,
35 tables: Tables,
36 w: usize,
37 h: usize,
38 minor_ver: u8,
39 rpr: RPRInfo,
2a2aa421 40 bdsp: H263BlockDSP,
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41}
42
43struct RealVideo20BR<'a> {
44 br: BitReader<'a>,
45 tables: &'a Tables,
46 num_slices: usize,
47 slice_no: usize,
48 slice_off: Vec<u32>,
49 w: usize,
50 h: usize,
51 mb_w: usize,
52 mb_h: usize,
be91b1c3 53 mb_pos_bits: u8,
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54 minor_ver: u8,
55 rpr: RPRInfo,
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56}
57
58struct RV20SliceInfo {
59 ftype: Type,
32007ad9 60 seq: u32,
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61 qscale: u8,
62 mb_x: usize,
63 mb_y: usize,
64 mb_pos: usize,
65 w: usize,
66 h: usize,
67}
68
69impl RV20SliceInfo {
32007ad9 70 fn new(ftype: Type, seq: u32, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self {
e07387c7 71 RV20SliceInfo { ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h }
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72 }
73}
74
75impl<'a> RealVideo20BR<'a> {
76 fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self {
77 let nslices = (src[0] as usize) + 1;
78 let mut slice_offs = Vec::with_capacity(nslices);
79 {
80 let offs = &src[1..][..nslices * 8];
81 let mut br = BitReader::new(offs, offs.len(), BitReaderMode::BE);
82 for _ in 0..nslices {
83 br.skip(32).unwrap();
84 let off = br.read(32).unwrap();
85 slice_offs.push(off);
86 }
87 }
88 let soff = nslices * 8 + 1;
89 let mb_w = (width + 15) >> 4;
90 let mb_h = (height + 15) >> 4;
91 let max_pos = mb_w * mb_h - 1;
92 let mut mbpb = 0;
93 for i in 0..H263_MBB.len() {
94 if max_pos <= H263_MBB[i].blocks {
95 mbpb = H263_MBB[i].bits;
96 break;
97 }
98 }
99 RealVideo20BR {
100 br: BitReader::new(&src[soff..], src.len() - soff, BitReaderMode::BE),
e07387c7 101 tables,
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102 num_slices: nslices,
103 slice_no: 0,
104 slice_off: slice_offs,
105 w: width,
106 h: height,
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107 mb_w,
108 mb_h,
be91b1c3 109 mb_pos_bits: mbpb,
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110 minor_ver,
111 rpr,
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112 }
113 }
114
2a2aa421 115#[allow(unused_variables)]
0c3b4923 116 fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize, acpred: ACPredMode) -> DecoderResult<()> {
9037cf6b 117 let br = &mut self.br;
be91b1c3 118 let mut idx = 0;
2a2aa421 119 if !sstate.is_iframe && intra {
fc26b944 120 let mut dc = br.read(8)? as i16;
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121 if dc == 255 { dc = 128; }
122 blk[0] = dc << 3;
123 idx = 1;
124 }
125 if !coded { return Ok(()); }
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126 let scan = match acpred {
127 ACPredMode::Hor => H263_SCAN_V,
128 ACPredMode::Ver => H263_SCAN_H,
64e8b971 129 _ => &ZIGZAG,
0c3b4923 130 };
be91b1c3 131
2a2aa421 132 let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
e3ace094 133 let q_add = if quant == 0 || sstate.is_iframe { 0i16 } else { ((quant - 1) | 1) as i16 };
43c8b55e 134 let q = if plane_no == 0 { (quant * 2) as i16 } else { H263_CHROMA_QUANT[quant as usize] as i16 };
be91b1c3 135 while idx < 64 {
fc26b944 136 let code = br.read_cb(rl_cb)?;
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137 let run;
138 let mut level;
139 let last;
140 if !code.is_escape() {
141 run = code.get_run();
142 level = code.get_level();
143 last = code.is_last();
fc26b944 144 if br.read_bool()? { level = -level; }
32007ad9 145 level = (level * q) + q_add;
be91b1c3 146 } else {
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147 last = br.read_bool()?;
148 run = br.read(6)? as u8;
149 level = br.read_s(8)? as i16;
be91b1c3 150 if level == -128 {
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151 let low = br.read(5)? as i16;
152 let top = br.read_s(6)? as i16;
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153 level = (top << 5) | low;
154 }
32007ad9 155 level = (level * q) + q_add;
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156 if level < -2048 { level = -2048; }
157 if level > 2047 { level = 2047; }
158 }
159 idx += run;
160 validate!(idx < 64);
0c3b4923 161 let oidx = scan[idx as usize];
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162 blk[oidx] = level;
163 idx += 1;
164 if last { break; }
165 }
166 Ok(())
167 }
168}
169
170fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
fc26b944 171 let code = br.read_cb(mv_cb)? as i16;
be91b1c3 172 if code == 0 { return Ok(0) }
fc26b944 173 if !br.read_bool()? {
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174 Ok(code)
175 } else {
176 Ok(-code)
177 }
178}
179
180fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
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181 let xval = decode_mv_component(br, mv_cb)?;
182 let yval = decode_mv_component(br, mv_cb)?;
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183 Ok(MV::new(xval, yval))
184}
185
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186fn read_dquant(br: &mut BitReader, q: u8) -> DecoderResult<u8> {
187 if br.read_bool()? {
188 Ok(H263_MODIFIED_QUANT[br.read(1)? as usize][q as usize])
189 } else {
190 Ok(br.read(5)? as u8)
191 }
192}
193
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194impl<'a> BlockDecoder for RealVideo20BR<'a> {
195
196#[allow(unused_variables)]
197 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
198 self.slice_no = 0;
fc26b944 199 let shdr = self.read_slice_header()?;
2a2aa421 200// self.slice_no += 1;
be91b1c3 201 validate!((shdr.mb_x == 0) && (shdr.mb_y == 0));
2a2aa421 202/* let mb_count;
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203 if self.slice_no < self.num_slices {
204 let pos = self.br.tell();
fc26b944 205 let shdr2 = self.read_slice_header()?;
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206 self.br.seek(pos as u32)?;
207 mb_count = shdr2.mb_pos - shdr.mb_pos;
208 } else {
209 mb_count = self.mb_w * self.mb_h;
2a2aa421 210 }*/
be91b1c3 211
0c3b4923 212 let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false));
32007ad9 213 let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, MVMode::Long, false, false, shdr.qscale, shdr.seq as u16, None, plusinfo);
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214 Ok(picinfo)
215 }
216
217 #[allow(unused_variables)]
2a2aa421 218 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
fc26b944 219 let shdr = self.read_slice_header()?;
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220 self.slice_no += 1;
221 let mb_count;
222 if self.slice_no < self.num_slices {
0c3b4923 223 let pos = self.br.tell();
fc26b944 224 let shdr2 = self.read_slice_header()?;
be91b1c3 225 mb_count = shdr2.mb_pos - shdr.mb_pos;
0c3b4923 226 self.br.seek(pos as u32)?;
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227 } else {
228 mb_count = self.mb_w * self.mb_h - shdr.mb_pos;
229 }
2a2aa421 230 let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale);
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231
232 Ok(ret)
233 }
234
43c8b55e 235 fn decode_block_header(&mut self, info: &PicInfo, _slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
9037cf6b 236 let br = &mut self.br;
43c8b55e 237 let mut q = sstate.quant;
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238 match info.get_mode() {
239 Type::I => {
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240 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
241 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
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242 let mut acpred = ACPredMode::None;
243 if let Some(ref pi) = info.plusinfo {
244 if pi.aic {
245 let acpp = br.read_bool()?;
246 acpred = ACPredMode::DC;
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247 if acpp {
248 acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver };
249 }
250 }
0c3b4923 251 }
fc26b944 252 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
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253 let cbp = (cbpy << 2) | (cbpc & 3);
254 let dquant = (cbpc & 4) != 0;
255 if dquant {
43c8b55e 256 q = read_dquant(br, q)?;
be91b1c3 257 }
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258 let mut binfo = BlockInfo::new(Type::I, cbp, q);
259 binfo.set_acpred(acpred);
260 Ok(binfo)
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261 },
262 Type::P => {
fc26b944 263 if br.read_bool()? {
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264 return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
265 }
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266 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
267 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
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268 let is_intra = (cbpc & 0x04) != 0;
269 let dquant = (cbpc & 0x08) != 0;
270 let is_4x4 = (cbpc & 0x10) != 0;
271 if is_intra {
fc26b944 272 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
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273 let cbp = (cbpy << 2) | (cbpc & 3);
274 if dquant {
43c8b55e 275 q = read_dquant(br, q)?;
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276 }
277 let binfo = BlockInfo::new(Type::I, cbp, q);
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278 return Ok(binfo);
279 }
280
fc26b944 281 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
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282// if /* !aiv && */(cbpc & 3) != 3 {
283 cbpy ^= 0xF;
284// }
285 let cbp = (cbpy << 2) | (cbpc & 3);
286 if dquant {
43c8b55e 287 q = read_dquant(br, q)?;
be91b1c3 288 }
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289 let mut binfo = BlockInfo::new(Type::P, cbp, q);
290 if !is_4x4 {
fc26b944 291 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
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292 binfo.set_mv(&mvec);
293 } else {
294 let mvec: [MV; 4] = [
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295 decode_mv(br, &self.tables.mv_cb)?,
296 decode_mv(br, &self.tables.mv_cb)?,
297 decode_mv(br, &self.tables.mv_cb)?,
298 decode_mv(br, &self.tables.mv_cb)?
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299 ];
300 binfo.set_mv(&mvec);
301 }
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302 Ok(binfo)
303 },
32007ad9 304 Type::B => { // B
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305 let mut mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize;
306 while mbtype == 14 { mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; }
307
308 let is_coded = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_CODED) != 0;
309 let is_intra = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_INTRA) != 0;
310 let dquant = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_DQUANT) != 0;
311 let is_fwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_FORWARD) != 0;
312 let is_bwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_BACKWARD) != 0;
313
314 let cbp = if is_coded {
315 let cbpc = br.read_cb(&self.tables.cbpc_b_cb)?;
316 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
317 if !is_intra { cbpy ^= 0xF; }
318 (cbpy << 2) | (cbpc & 3)
319 } else { 0 };
1a151e53 320
507f4b11 321 if dquant {
43c8b55e 322 q = read_dquant(br, q)?;
507f4b11 323 }
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324
325 if is_intra {
326 let binfo = BlockInfo::new(Type::I, cbp, q);
327 return Ok(binfo);
328 }
329
330 let mut binfo = BlockInfo::new(Type::B, cbp, q);
331 if is_fwd {
332 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
333 binfo.set_mv(&mvec);
334 }
335 if is_bwd {
336 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
337 binfo.set_b_mv(&mvec);
338 }
339 Ok(binfo)
340 },
32007ad9 341 _ => { unreachable!(); },
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342 }
343 }
344
2a2aa421 345 fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
0c3b4923 346 self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred())
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347 }
348
349 #[allow(unused_variables)]
2a2aa421 350 fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
0c3b4923 351 self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None)
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352 }
353
2a2aa421 354 fn is_slice_end(&mut self) -> bool { false }
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355}
356
357impl<'a> RealVideo20BR<'a> {
2a2aa421 358#[allow(unused_variables)]
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359 fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> {
360 validate!(self.slice_no < self.num_slices);
361
9037cf6b 362 let br = &mut self.br;
fc26b944 363 br.seek(self.slice_off[self.slice_no] * 8)?;
be91b1c3 364
fc26b944 365 let frm_type = br.read(2)?;
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366 let ftype = match frm_type {
367 0 | 1 => { Type::I },
368 2 => { Type::P },
507f4b11 369 _ => { Type::B },
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370 };
371
fc26b944 372 let marker = br.read(1)?;
be91b1c3 373 validate!(marker == 0);
fc26b944 374 let qscale = br.read(5)? as u8;
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375 validate!(qscale > 0);
376 if self.minor_ver >= 2 {
fc26b944 377 br.skip(1)?; // loop filter
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378 }
379 let seq = if self.minor_ver <= 1 {
32007ad9 380 br.read(8)? << 8
be91b1c3 381 } else {
32007ad9 382 br.read(13)? << 3
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383 };
384 let w;
385 let h;
386 if self.rpr.present {
fc26b944 387 let rpr = br.read(self.rpr.bits)? as usize;
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388 if rpr == 0 {
389 w = self.w;
390 h = self.h;
391 } else {
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392 w = self.rpr.widths[rpr - 1];
393 h = self.rpr.heights[rpr - 1];
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394 validate!((w != 0) && (h != 0));
395 }
396 } else {
397 w = self.w;
398 h = self.h;
399 }
400
fc26b944 401 let mb_pos = br.read(self.mb_pos_bits)? as usize;
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402 let mb_x = mb_pos % self.mb_w;
403 let mb_y = mb_pos / self.mb_w;
404
fc26b944 405 br.skip(1)?; // no rounding
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406
407 if (self.minor_ver <= 1) && (frm_type == 3) {
fc26b944 408 br.skip(5)?;
be91b1c3 409 }
be91b1c3 410
32007ad9 411 Ok(RV20SliceInfo::new(ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h))
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412 }
413}
414
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415impl RealVideo20Decoder {
416 fn new() -> Self {
417 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
418 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
419 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
420 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
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421 let mut coderead = H263ShortCodeReader::new(H263_MBTYPE_B);
422 let mbtype_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
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423 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
424 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
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425 let mut coderead = H263ShortCodeReader::new(H263_CBPC_B);
426 let cbpc_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
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427 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
428 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
429 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
430 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
431 let mut coderead = H263ShortCodeReader::new(H263_MV);
432 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
1a151e53 433
be91b1c3 434 let tables = Tables {
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435 intra_mcbpc_cb,
436 inter_mcbpc_cb,
437 mbtype_b_cb,
438 cbpy_cb,
439 cbpc_b_cb,
440 rl_cb,
441 aic_rl_cb,
442 mv_cb,
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443 };
444
445 RealVideo20Decoder{
2422d969 446 info: NACodecInfoRef::default(),
32007ad9 447 dec: H263BaseDecoder::new_b_frames(false),
e07387c7 448 tables,
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449 w: 0,
450 h: 0,
451 minor_ver: 0,
452 rpr: RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
2a2aa421 453 bdsp: H263BlockDSP::new(),
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454 }
455 }
456}
457
458impl NADecoder for RealVideo20Decoder {
2a2aa421 459#[allow(unused_variables)]
01613464 460 fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
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461 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
462 let w = vinfo.get_width();
463 let h = vinfo.get_height();
464 let fmt = formats::YUV420_FORMAT;
465 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
2422d969 466 self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
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467 self.w = w;
468 self.h = h;
469
470 let edata = info.get_extradata().unwrap();
471 let src: &[u8] = &edata;
472 let ver = ((src[4] as u32) << 12) | ((src[5] as u32) << 4) | ((src[6] as u32) >> 4);
473 let maj_ver = ver >> 16;
474 let min_ver = (ver >> 8) & 0xFF;
475 let mic_ver = ver & 0xFF;
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476 validate!(maj_ver == 2);
477 self.minor_ver = min_ver as u8;
478 let rprb = src[1] & 7;
479 if rprb == 0 {
480 self.rpr.present = false;
481 } else {
482 self.rpr.present = true;
7c37f176 483 self.rpr.bits = ((rprb >> 1) + 1) as u8;
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484 for i in 4..(src.len()/2) {
485 self.rpr.widths [i - 4] = (src[i * 2] as usize) * 4;
486 self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4;
487 }
488 }
489 Ok(())
490 } else {
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491 Err(DecoderError::InvalidData)
492 }
493 }
01613464 494 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
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495 let src = pkt.get_buffer();
496
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497 let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr);
498
fc26b944 499 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
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500
501 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
502 frm.set_keyframe(self.dec.is_intra());
507f4b11 503 frm.set_frame_type(self.dec.get_frame_type());
171860fc 504 Ok(frm.into_ref())
be91b1c3 505 }
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506 fn flush(&mut self) {
507 self.dec.flush();
508 }
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509}
510
511struct MBB { blocks: usize, bits: u8 }
512const H263_MBB: &[MBB; 7] = &[
513 MBB{ blocks: 47, bits: 6 },
514 MBB{ blocks: 98, bits: 7 },
515 MBB{ blocks: 395, bits: 9 },
516 MBB{ blocks: 1583, bits: 11 },
517 MBB{ blocks: 6335, bits: 13 },
518 MBB{ blocks: 9215, bits: 14 },
519 MBB{ blocks: 65536, bits: 14 },
520];
521
6011e201 522pub fn get_decoder() -> Box<dyn NADecoder> {
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523 Box::new(RealVideo20Decoder::new())
524}
525
526#[cfg(test)]
527mod test {
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528 use nihav_core::codecs::RegisteredDecoders;
529 use nihav_core::demuxers::RegisteredDemuxers;
530 use nihav_core::test::dec_video::*;
531 use crate::codecs::realmedia_register_all_codecs;
532 use crate::demuxers::realmedia_register_all_demuxers;
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533 #[test]
534 fn test_rv20() {
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535 let mut dmx_reg = RegisteredDemuxers::new();
536 realmedia_register_all_demuxers(&mut dmx_reg);
537 let mut dec_reg = RegisteredDecoders::new();
538 realmedia_register_all_codecs(&mut dec_reg);
539
540 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);
7c37f176 541// test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(1000), true, false, Some("rv20"));
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542 }
543}