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87927c57 KS |
1 | use nihav_core::codecs::*; |
2 | use nihav_core::io::byteio::*; | |
3 | use nihav_core::io::bitreader::*; | |
4 | use nihav_core::io::intcode::*; | |
5 | ||
6 | const MAX_SAMPLES: usize = 32768; | |
7 | ||
8 | #[derive(Clone,Copy,PartialEq)] | |
9 | enum StereoMode { | |
10 | Normal, | |
11 | LeftSide, | |
12 | SideRight, | |
13 | MidSide, | |
14 | } | |
15 | ||
16 | struct FlacDecoder { | |
17 | ainfo: NAAudioInfo, | |
18 | chmap: NAChannelMap, | |
19 | min_blk_size: usize, | |
20 | max_blk_size: usize, | |
21 | min_frm_size: usize, | |
22 | max_frm_size: usize, | |
23 | channels: u8, | |
24 | bits: u8, | |
25 | srate: u32, | |
26 | residues: [Vec<i32>; 8], | |
27 | } | |
28 | ||
29 | fn decode_partition(br: &mut BitReader, dst: &mut [i32], k: u8) -> DecoderResult<()> { | |
30 | for el in dst.iter_mut() { | |
31 | let val = br.read_code(UintCodeType::Rice(k))?; | |
32 | if (val & 1) == 0 { | |
33 | *el = (val >> 1) as i32; | |
34 | } else { | |
35 | *el = -(((val + 1) >> 1) as i32); | |
36 | } | |
37 | } | |
38 | Ok(()) | |
39 | } | |
40 | ||
41 | fn decode_residual(br: &mut BitReader, dst: &mut [i32], order: usize) -> DecoderResult<()> { | |
42 | let mode = br.read(2)?; | |
43 | validate!(mode < 2); | |
44 | let rice_k = if mode == 0 { 4 } else { 5 }; | |
45 | let esc = (1 << rice_k) - 1; | |
46 | ||
47 | let num_partitions = 1 << br.read(4)?; | |
48 | let tot_size = dst.len() + order; | |
49 | validate!((tot_size % num_partitions) == 0); | |
50 | let psize = tot_size / num_partitions; | |
51 | validate!(psize >= order); | |
52 | let mut off = psize - order; | |
53 | let k = br.read(rice_k)? as u8; | |
54 | if k != esc { | |
55 | decode_partition(br, &mut dst[..off], k)?; | |
56 | } else { | |
57 | let bits = br.read(5)? as u8; | |
58 | for el in dst.iter_mut().take(off) { | |
59 | *el = br.read_s(bits)?; | |
60 | } | |
61 | } | |
62 | for _ in 1..num_partitions { | |
63 | let k = br.read(rice_k)? as u8; | |
64 | if k != esc { | |
65 | decode_partition(br, &mut dst[off..][..psize], k)?; | |
66 | } else { | |
67 | let bits = br.read(5)? as u8; | |
68 | for el in dst[off..].iter_mut().take(psize) { | |
69 | *el = br.read_s(bits)?; | |
70 | } | |
71 | } | |
72 | off += psize; | |
73 | } | |
74 | ||
75 | Ok(()) | |
76 | } | |
77 | ||
78 | fn apply_fixed_predictor(dst: &mut [i32], order: usize) { | |
79 | match order { | |
80 | 1 => { | |
81 | let mut last = dst[0]; | |
82 | for el in dst.iter_mut().skip(1) { | |
83 | *el += last; | |
84 | last = *el; | |
85 | } | |
86 | }, | |
87 | 2 => { | |
88 | let mut last0 = dst[1]; | |
89 | let mut last1 = last0 - dst[0]; | |
90 | for el in dst.iter_mut().skip(2) { | |
91 | last1 += *el; | |
92 | last0 += last1; | |
93 | *el = last0; | |
94 | } | |
95 | }, | |
96 | 3 => { | |
97 | let mut last0 = dst[2]; | |
98 | let mut last1 = last0 - dst[1]; | |
99 | let mut last2 = last1 - dst[1] + dst[0]; | |
100 | for el in dst.iter_mut().skip(3) { | |
101 | last2 += *el; | |
102 | last1 += last2; | |
103 | last0 += last1; | |
104 | *el = last0; | |
105 | } | |
106 | }, | |
107 | 4 => { | |
108 | let mut last0 = dst[3]; | |
109 | let mut last1 = last0 - dst[2]; | |
110 | let mut last2 = last1 - dst[2] + dst[1]; | |
111 | let mut last3 = last2 - dst[2] + 2 * dst[1] - dst[0]; | |
112 | for el in dst.iter_mut().skip(4) { | |
113 | last3 += *el; | |
114 | last2 += last3; | |
115 | last1 += last2; | |
116 | last0 += last1; | |
117 | *el = last0; | |
118 | } | |
119 | }, | |
120 | _ => unreachable!(), | |
121 | }; | |
122 | } | |
123 | ||
fdd68493 | 124 | fn apply_lpc(dst: &mut [i32], filt: &[i32; 32], order: usize, shift: u8) { |
87927c57 KS |
125 | for i in order..dst.len() { |
126 | let mut sum = 0i64; | |
127 | for (coef, filt) in dst[i - order..].iter().take(order).zip(filt.iter()) { | |
128 | sum += i64::from(*coef) * i64::from(*filt); | |
129 | } | |
130 | dst[i] += (sum >> shift) as i32; | |
131 | } | |
132 | } | |
133 | ||
134 | impl FlacDecoder { | |
135 | fn new() -> Self { | |
136 | Self { | |
137 | ainfo: NAAudioInfo::new(0, 1, SND_S16P_FORMAT, 0), | |
138 | chmap: NAChannelMap::new(), | |
139 | min_blk_size: 0, | |
140 | max_blk_size: 0, | |
141 | min_frm_size: 0, | |
142 | max_frm_size: 0, | |
143 | channels: 0, | |
144 | bits: 0, | |
145 | srate: 0, | |
146 | residues: [vec![0; MAX_SAMPLES], vec![0; MAX_SAMPLES], | |
147 | vec![0; MAX_SAMPLES], vec![0; MAX_SAMPLES], | |
148 | vec![0; MAX_SAMPLES], vec![0; MAX_SAMPLES], | |
149 | vec![0; MAX_SAMPLES], vec![0; MAX_SAMPLES]], | |
150 | } | |
151 | } | |
152 | fn apply_chmod(&mut self, blocksize: usize, chmod: StereoMode) { | |
153 | match chmod { | |
154 | StereoMode::Normal => {}, | |
155 | StereoMode::LeftSide => { | |
156 | for i in 0..blocksize { | |
157 | self.residues[1][i] = self.residues[0][i].wrapping_sub(self.residues[1][i]); | |
158 | } | |
159 | }, | |
160 | StereoMode::SideRight => { | |
161 | for i in 0..blocksize { | |
162 | self.residues[0][i] = self.residues[0][i].wrapping_add(self.residues[1][i]); | |
163 | } | |
164 | }, | |
165 | StereoMode::MidSide => { | |
166 | for i in 0..blocksize { | |
167 | let r = self.residues[0][i].wrapping_sub(self.residues[1][i] >> 1); | |
168 | self.residues[0][i] = self.residues[1][i].wrapping_add(r); | |
169 | self.residues[1][i] = r; | |
170 | } | |
171 | }, | |
172 | }; | |
173 | } | |
174 | fn decode_subframe(&mut self, br: &mut BitReader, channel: usize, blocksize: usize, mut samp_bits: u8) -> DecoderResult<()> { | |
175 | let marker = br.read(1)?; | |
176 | validate!(marker == 0); | |
177 | let sftype = br.read(6)?; | |
178 | ||
179 | if br.read_bool()? { | |
180 | let nbits = br.read_code(UintCodeType::UnaryZeroes)?; | |
181 | validate!(nbits < 32 && samp_bits > nbits as u8); | |
182 | samp_bits -= nbits as u8; | |
183 | } | |
184 | ||
185 | let dst = &mut self.residues[channel][..blocksize]; | |
186 | match sftype { | |
187 | 0x00 => { | |
188 | let val = br.read_s(samp_bits)?; | |
189 | for el in dst.iter_mut() { | |
190 | *el = val; | |
191 | } | |
192 | }, | |
193 | 0x01 => { | |
194 | for el in dst.iter_mut() { | |
195 | *el = br.read_s(samp_bits)?; | |
196 | } | |
197 | }, | |
198 | 0x08..=0x0C => { | |
199 | let order = (sftype - 0x08) as usize; | |
200 | for el in dst.iter_mut().take(order) { | |
201 | *el = br.read_s(samp_bits)?; | |
202 | } | |
203 | decode_residual(br, &mut dst[order..], order)?; | |
204 | if order > 0 { | |
205 | apply_fixed_predictor(dst, order); | |
206 | } | |
207 | }, | |
208 | 0x20..=0x3F => { | |
209 | let order = (sftype - 0x20) as usize + 1; | |
210 | for el in dst.iter_mut().take(order) { | |
211 | *el = br.read_s(samp_bits)?; | |
212 | } | |
213 | let precision = br.read(4)? as u8 + 1; | |
214 | validate!(precision < 16); | |
215 | let shift = br.read(5)? as u8; | |
fdd68493 | 216 | let mut filter = [0i32; 32]; |
87927c57 KS |
217 | for el in filter[..order].iter_mut().rev() { |
218 | *el = br.read_s(precision)?; | |
219 | } | |
220 | decode_residual(br, &mut dst[order..], order)?; | |
221 | apply_lpc(dst, &filter, order, shift); | |
222 | }, | |
223 | _ => return Err(DecoderError::InvalidData), | |
224 | }; | |
225 | ||
226 | Ok(()) | |
227 | } | |
228 | } | |
229 | ||
230 | impl NADecoder for FlacDecoder { | |
231 | fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { | |
232 | const DEFAULT_CHANNEL_MAPS: [&str; 8] = [ | |
233 | "C", | |
234 | "L,R", | |
235 | "L,R,C", | |
236 | "L,R,Ls,Rs", | |
237 | "L,R,C,Ls,Rs", | |
238 | "L,R,C,LFE,Ls,Rs", | |
239 | "L,R,C,LFE,Cs,Ls,Rs", | |
240 | "L,R,C,LFE,Ls,Rs,Lss,Rss" | |
241 | ]; | |
242 | if let NACodecTypeInfo::Audio(_ainfo) = info.get_properties() { | |
243 | if let Some(buf) = info.get_extradata() { | |
244 | validate!(buf.len() >= 22); | |
245 | ||
246 | let mut mr = MemoryReader::new_read(&buf); | |
247 | let mut br = ByteReader::new(&mut mr); | |
248 | ||
249 | self.min_blk_size = br.read_u16be()? as usize; | |
250 | self.max_blk_size = br.read_u16be()? as usize; | |
251 | self.min_frm_size = br.read_u24be()? as usize; | |
252 | self.max_frm_size = br.read_u24be()? as usize; | |
253 | let tmp = br.read_u64be()?; | |
254 | self.srate = (tmp >> 44) as u32; | |
255 | self.channels = (((tmp >> 41) & 7) + 1) as u8; | |
256 | self.bits = (((tmp >> 36) & 0x1F) + 1) as u8; | |
257 | //let tot_samples = tmp & ((1 << 36) - 1); | |
258 | ||
259 | self.chmap = NAChannelMap::from_str(DEFAULT_CHANNEL_MAPS[(self.channels - 1) as usize]).unwrap(); | |
260 | let fmt = match self.bits { | |
261 | 8 | 12 | 16 => SND_S16P_FORMAT, | |
262 | 24 => SND_S32P_FORMAT, | |
263 | _ => return Err(DecoderError::NotImplemented), | |
264 | }; | |
265 | ||
266 | self.ainfo = NAAudioInfo::new(self.srate, self.channels as u8, fmt, self.max_blk_size.max(1)); | |
267 | Ok(()) | |
268 | } else { | |
269 | Err(DecoderError::InvalidData) | |
270 | } | |
271 | } else { | |
272 | Err(DecoderError::InvalidData) | |
273 | } | |
274 | } | |
275 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { | |
276 | let info = pkt.get_stream().get_info(); | |
277 | if let NACodecTypeInfo::Audio(_) = info.get_properties() { | |
278 | let pktbuf = pkt.get_buffer(); | |
279 | validate!(pktbuf.len() >= 9.max(self.min_frm_size)); | |
280 | ||
281 | let ref_crc = read_u16be(&pktbuf[pktbuf.len() - 2..]).unwrap_or(0); | |
282 | let mut crc = 0; | |
283 | for el in pktbuf.iter().take(pktbuf.len() - 2) { | |
284 | crc = update_crc16(crc, *el); | |
285 | } | |
286 | if crc != ref_crc { | |
287 | return Err(DecoderError::ChecksumError); | |
288 | } | |
289 | ||
290 | let mut br = BitReader::new(&pktbuf, BitReaderMode::BE); | |
291 | ||
292 | let sync = br.read(14)?; | |
293 | validate!(sync == 0x3FFE); | |
294 | br.skip(1)?; | |
295 | let _blocking = br.read(1)?; | |
296 | let bsize_idx = br.read(4)?; | |
297 | let srate_idx = br.read(4)?; | |
298 | let chan_idx = br.read(4)?; | |
299 | let bits_idx = br.read(3)?; | |
300 | br.skip(1)?; | |
301 | // UTF-8 encoded block or sample number | |
302 | let byte = br.read(8)? as u8; | |
303 | let len = (!byte).leading_zeros(); | |
304 | validate!(len <= 5 && len != 1); | |
305 | if len > 1 { | |
306 | for _ in 1..len { | |
307 | let byte = br.read(8)?; | |
308 | validate!((byte & 0xC0) == 0x80); | |
309 | } | |
310 | } | |
311 | let blocksize = match bsize_idx { | |
312 | 0 => return Err(DecoderError::InvalidData), | |
313 | 1 => 192, | |
314 | 2..=5 => 576 << (bsize_idx - 2), | |
315 | 6 => br.read(8)? as usize + 1, | |
316 | 7 => br.read(16)? as usize + 1, | |
317 | _ => 256 << (bsize_idx - 8), | |
318 | }; | |
319 | let srate = match srate_idx { | |
320 | 0 => self.srate, | |
321 | 1 => 88200, | |
322 | 2 => 176400, | |
323 | 3 => 192000, | |
324 | 4 => 8000, | |
325 | 5 => 16000, | |
326 | 6 => 22050, | |
327 | 7 => 24000, | |
328 | 8 => 32000, | |
329 | 9 => 44100, | |
330 | 10 => 48000, | |
331 | 11 => 96000, | |
332 | 12 => br.read(8)? * 1000, | |
333 | 13 => br.read(16)?, | |
334 | 14 => br.read(16)? * 10, | |
335 | _ => return Err(DecoderError::InvalidData), | |
336 | }; | |
337 | validate!(srate != 0 && srate == self.srate); | |
338 | let (channels, chmod) = match chan_idx { | |
339 | 0..=7 => (chan_idx as u8 + 1, StereoMode::Normal), | |
340 | 8 => (2, StereoMode::LeftSide), | |
341 | 9 => (2, StereoMode::SideRight), | |
342 | 10 => (2, StereoMode::MidSide), | |
343 | _ => return Err(DecoderError::InvalidData), | |
344 | }; | |
345 | validate!(channels == self.channels); | |
346 | let bits = match bits_idx { | |
347 | 0 => self.bits, | |
348 | 1 => 8, | |
349 | 2 => 12, | |
350 | 4 => 16, | |
351 | 5 => 20, | |
352 | 6 => 24, | |
353 | _ => return Err(DecoderError::InvalidData), | |
354 | }; | |
355 | validate!(bits == self.bits); | |
356 | ||
357 | let end = br.tell() / 8; | |
358 | let ref_crc = br.read(8)? as u8; | |
359 | let mut crc = 0; | |
360 | for el in pktbuf.iter().take(end) { | |
361 | crc = update_crc8(crc, *el); | |
362 | } | |
363 | if crc != ref_crc { | |
364 | return Err(DecoderError::ChecksumError); | |
365 | } | |
366 | ||
367 | for ch in 0..(channels as usize) { | |
368 | let samp_bits = match (chmod, ch) { | |
369 | (StereoMode::LeftSide, 1) | | |
370 | (StereoMode::SideRight, 0) | | |
371 | (StereoMode::MidSide, 1) => self.bits + 1, | |
372 | _ => self.bits, | |
373 | }; | |
374 | validate!(samp_bits <= 32); | |
375 | self.decode_subframe(&mut br, ch, blocksize, samp_bits)?; | |
376 | } | |
377 | if channels == 2 { | |
378 | self.apply_chmod(blocksize, chmod); | |
379 | } | |
380 | ||
381 | let mut abuf = alloc_audio_buffer(self.ainfo, blocksize, self.chmap.clone())?; | |
382 | let postshift = if self.bits == 24 { 8 } else { 16 - self.bits }; | |
383 | match abuf { | |
384 | NABufferType::AudioI16(ref mut adata) => { | |
385 | let stride = adata.get_stride(); | |
386 | let dst = adata.get_data_mut().unwrap(); | |
387 | let mut off = 0; | |
388 | for residues in self.residues.iter().take(channels as usize) { | |
389 | let dst = &mut dst[off..][..blocksize]; | |
390 | for (dst, src) in dst.iter_mut().zip(residues.iter()) { | |
391 | *dst = (*src << postshift) as i16; | |
392 | } | |
393 | off += stride; | |
394 | } | |
395 | }, | |
396 | NABufferType::AudioI32(ref mut adata) => { | |
397 | let stride = adata.get_stride(); | |
398 | let dst = adata.get_data_mut().unwrap(); | |
399 | let mut off = 0; | |
400 | for residues in self.residues.iter().take(channels as usize) { | |
401 | let dst = &mut dst[off..][..blocksize]; | |
402 | for (dst, src) in dst.iter_mut().zip(residues.iter()) { | |
403 | *dst = *src << postshift; | |
404 | } | |
405 | off += stride; | |
406 | } | |
407 | }, | |
408 | _ => unreachable!(), | |
409 | }; | |
410 | ||
411 | let mut frm = NAFrame::new_from_pkt(pkt, info, abuf); | |
412 | frm.set_duration(Some(blocksize as u64)); | |
413 | Ok(frm.into_ref()) | |
414 | } else { | |
415 | Err(DecoderError::InvalidData) | |
416 | } | |
417 | } | |
418 | fn flush(&mut self) { | |
419 | } | |
420 | } | |
421 | ||
422 | impl NAOptionHandler for FlacDecoder { | |
423 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } | |
424 | fn set_options(&mut self, _options: &[NAOption]) { } | |
425 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } | |
426 | } | |
427 | ||
428 | pub fn get_decoder() -> Box<dyn NADecoder + Send> { | |
429 | Box::new(FlacDecoder::new()) | |
430 | } | |
431 | ||
2cd9d8a6 KS |
432 | #[derive(Clone,Copy,Default)] |
433 | struct FrameHeader { | |
434 | blocksize: u32, | |
435 | srate: u32, | |
436 | channels: u8, | |
437 | bits: u8, | |
438 | time: u64, | |
439 | blk_strat: bool, | |
440 | } | |
441 | ||
442 | #[derive(Default)] | |
443 | struct FLACPacketiser { | |
444 | hdr: FrameHeader, | |
445 | buf: Vec<u8>, | |
446 | ref_crc: u16, | |
447 | cur_crc: u16, | |
448 | end: usize, | |
449 | hdr_ok: bool, | |
450 | } | |
451 | ||
452 | fn read_utf8(br: &mut BitReader) -> DecoderResult<u64> { | |
453 | let byte = br.read(8)? as u8; | |
454 | let len = (!byte).leading_zeros(); | |
455 | if (len == 1) || (len > 5) { | |
456 | return Err(DecoderError::InvalidData); | |
457 | } | |
458 | if len > 1 { | |
459 | let mut val = u64::from(byte << len >> len); | |
460 | for _ in 1..len { | |
461 | let byte = br.read(8)?; | |
462 | if (byte & 0xC0) != 0x80 { | |
463 | return Err(DecoderError::InvalidData); | |
464 | } | |
465 | val = (val << 6) | u64::from(byte & 0x3F); | |
466 | } | |
467 | Ok(val) | |
468 | } else { | |
469 | Ok(u64::from(byte)) | |
470 | } | |
471 | } | |
472 | ||
473 | impl FLACPacketiser { | |
474 | fn new() -> Self { Self::default() } | |
475 | fn parse_header(&self) -> DecoderResult<FrameHeader> { | |
476 | if self.buf.len() < 5 { | |
477 | return Err(DecoderError::ShortData); | |
478 | } | |
479 | let mut br = BitReader::new(&self.buf, BitReaderMode::BE); | |
480 | let sync_code = br.read(14)?; | |
481 | if sync_code != 0x3FFE { | |
482 | return Err(DecoderError::InvalidData); | |
483 | } | |
484 | let marker = br.read(1)?; | |
485 | if marker != 0 { | |
486 | return Err(DecoderError::InvalidData); | |
487 | } | |
488 | let blk_strat = br.read_bool()?; | |
489 | let bsize = br.read(4)?; | |
490 | let srate_idx = br.read(4)? as u8; | |
491 | let chan_idx = br.read(4)? as u8; | |
492 | let bits = match br.read(3)? { | |
493 | 0 => 0, | |
494 | 1 => 8, | |
495 | 2 => 12, | |
496 | 4 => 16, | |
497 | 5 => 20, | |
498 | 6 => 24, | |
499 | _ => return Err(DecoderError::InvalidData), | |
500 | }; | |
501 | let marker = br.read(1)?; | |
502 | if marker != 0 { | |
503 | return Err(DecoderError::InvalidData); | |
504 | } | |
505 | ||
506 | let time = read_utf8(&mut br)?; | |
507 | ||
508 | let blocksize = match bsize { | |
509 | 1 => 192, | |
510 | 2..=5 => 576 << (bsize - 2), | |
511 | 6 => br.read(8)? + 1, | |
512 | 7 => br.read(16)? + 1, | |
513 | 8..=15 => 256 << (bsize - 8), | |
514 | _ => return Err(DecoderError::InvalidData), | |
515 | }; | |
516 | let srate = match srate_idx { | |
517 | 0 => 0, | |
518 | 1 => 88200, | |
519 | 2 => 176400, | |
520 | 3 => 192000, | |
521 | 4 => 8000, | |
522 | 5 => 16000, | |
523 | 6 => 22050, | |
524 | 7 => 24000, | |
525 | 8 => 32000, | |
526 | 9 => 44100, | |
527 | 10 => 48000, | |
528 | 11 => 96000, | |
529 | 12 => br.read(8)? * 1000, | |
530 | 13 => br.read(16)?, | |
531 | 14 => br.read(16)? * 10, | |
532 | _ => return Err(DecoderError::InvalidData), | |
533 | }; | |
534 | let channels = match chan_idx { | |
535 | 0..=7 => chan_idx + 1, | |
536 | 8 | 9 | 10 => 2, | |
537 | _ => return Err(DecoderError::InvalidData), | |
538 | }; | |
539 | ||
540 | let hdr_size = br.tell() / 8; | |
541 | let ref_crc = br.read(8)? as u8; | |
542 | let mut crc = 0; | |
543 | for &b in self.buf[..hdr_size].iter() { | |
544 | crc = update_crc8(crc, b); | |
545 | } | |
546 | if crc != ref_crc { | |
547 | return Err(DecoderError::ChecksumError); | |
548 | } | |
549 | ||
550 | Ok(FrameHeader{ blk_strat, time, srate, channels, bits, blocksize }) | |
551 | } | |
552 | } | |
553 | ||
554 | impl NAPacketiser for FLACPacketiser { | |
555 | fn add_data(&mut self, src: &[u8]) -> bool { | |
556 | self.buf.extend_from_slice(src); | |
557 | self.buf.len() < 4096 | |
558 | } | |
559 | fn parse_stream(&mut self, id: u32) -> DecoderResult<NAStreamRef> { | |
560 | let hdr = self.parse_header()?; | |
561 | let ainfo = NAAudioInfo::new(hdr.srate, hdr.channels, if hdr.bits <= 16 { SND_S16P_FORMAT } else { SND_S32P_FORMAT }, hdr.blocksize as usize); | |
562 | let info = NACodecInfo::new("flac", NACodecTypeInfo::Audio(ainfo), None); | |
563 | Ok(NAStream::new(StreamType::Audio, id, info, 1, hdr.srate, 0).into_ref()) | |
564 | } | |
565 | fn skip_junk(&mut self) -> DecoderResult<usize> { | |
566 | Err(DecoderError::NotImplemented) | |
567 | } | |
568 | fn get_packet(&mut self, stream: NAStreamRef) -> DecoderResult<Option<NAPacket>> { | |
569 | if self.end == self.buf.len() || self.buf.len() < 5 { | |
570 | return Err(DecoderError::ShortData); | |
571 | } | |
572 | if !self.hdr_ok { | |
573 | self.hdr = self.parse_header()?; | |
574 | self.hdr_ok = true; | |
575 | self.cur_crc = 0; | |
576 | for i in 0..5 { | |
577 | self.cur_crc = update_crc16(self.cur_crc, self.buf[i]); | |
578 | } | |
579 | self.end = 5; | |
580 | } | |
581 | while self.end < self.buf.len() { | |
582 | let b = self.buf[self.end]; | |
583 | self.end += 1; | |
584 | match self.end { | |
585 | 0..=5 => unreachable!(), | |
586 | 6 => self.ref_crc = u16::from(b), | |
587 | 7 => self.ref_crc = (self.ref_crc << 8) | u16::from(b), | |
588 | _ => { | |
589 | let bbb = (self.ref_crc >> 8) as u8; | |
590 | self.ref_crc = (self.ref_crc << 8) | u16::from(b); | |
591 | self.cur_crc = update_crc16(self.cur_crc, bbb); | |
592 | let mut found = self.ref_crc == self.cur_crc; | |
593 | if self.end + 2 < self.buf.len() { | |
594 | let b1 = self.buf[self.end]; | |
595 | let b2 = self.buf[self.end + 1]; | |
596 | if b1 != 0xFF || (b2 & 0xFC) != 0xF8 { | |
597 | found = false; | |
598 | } | |
599 | } | |
600 | if found { | |
601 | let mut data = Vec::with_capacity(self.end); | |
602 | data.extend_from_slice(&self.buf[..self.end]); | |
603 | self.buf.drain(..self.end); | |
604 | let mut ts = NATimeInfo::new(None, None, Some(u64::from(self.hdr.blocksize)), 1, self.hdr.srate); | |
605 | ts.pts = if self.hdr.blk_strat { | |
606 | Some(self.hdr.time) | |
607 | } else { | |
608 | Some(self.hdr.time * u64::from(self.hdr.blocksize)) | |
609 | }; | |
610 | self.end = 0; | |
611 | self.hdr_ok = false; | |
612 | ||
613 | return Ok(Some(NAPacket::new(stream, ts, true, data))); | |
614 | } | |
615 | }, | |
616 | } | |
617 | } | |
618 | Ok(None) | |
619 | } | |
620 | fn reset(&mut self) { | |
621 | self.buf.clear(); | |
622 | self.end = 0; | |
623 | self.hdr_ok = false; | |
624 | } | |
7f754c49 | 625 | fn bytes_left(&self) -> usize { self.buf.len() } |
2cd9d8a6 KS |
626 | } |
627 | ||
628 | pub fn get_packetiser() -> Box<dyn NAPacketiser + Send> { | |
629 | Box::new(FLACPacketiser::new()) | |
630 | } | |
631 | ||
87927c57 KS |
632 | #[cfg(test)] |
633 | mod test { | |
2cd9d8a6 KS |
634 | use nihav_core::codecs::*; |
635 | use nihav_core::demuxers::*; | |
87927c57 KS |
636 | use nihav_codec_support::test::dec_video::*; |
637 | use crate::llaudio_register_all_decoders; | |
638 | use crate::llaudio_register_all_demuxers; | |
886cde48 | 639 | // sample: https://samples.mplayerhq.hu/A-codecs/lossless/luckynight.flac |
87927c57 KS |
640 | #[test] |
641 | fn test_flac() { | |
642 | let mut dmx_reg = RegisteredDemuxers::new(); | |
643 | llaudio_register_all_demuxers(&mut dmx_reg); | |
644 | let mut dec_reg = RegisteredDecoders::new(); | |
645 | llaudio_register_all_decoders(&mut dec_reg); | |
646 | ||
647 | test_decoding("flac", "flac", "assets/LLaudio/luckynight.flac", Some(6), &dmx_reg, &dec_reg, | |
648 | ExpectedTestResult::MD5([0xe689787a, 0x032a98f7, 0xeb6e64f4, 0xfa652132])); | |
649 | } | |
2cd9d8a6 KS |
650 | use std::io::{Read, Seek, SeekFrom}; |
651 | #[test] | |
652 | fn test_flac_packetiser() { | |
653 | let mut dmx_reg = RegisteredDemuxers::new(); | |
654 | llaudio_register_all_demuxers(&mut dmx_reg); | |
655 | let dmx_f = dmx_reg.find_demuxer("flac").unwrap(); | |
656 | let mut file = std::fs::File::open("assets/LLaudio/luckynight.flac").unwrap(); | |
657 | let mut fr = FileReader::new_read(&mut file); | |
658 | let mut br = ByteReader::new(&mut fr); | |
659 | let mut dmx = create_demuxer(dmx_f, &mut br).unwrap(); | |
660 | ||
661 | let mut pkt_sizes = Vec::new(); | |
662 | while let Ok(pkt) = dmx.get_frame() { | |
663 | pkt_sizes.push(pkt.get_buffer().len()); | |
664 | } | |
665 | ||
666 | let mut file = std::fs::File::open("assets/LLaudio/luckynight.flac").unwrap(); | |
667 | file.seek(SeekFrom::Start(0x115E)).unwrap(); | |
668 | ||
669 | let mut pkts = super::FLACPacketiser::new(); | |
670 | let mut buf = [0; 8192]; | |
671 | for _ in 0..16 { | |
672 | file.read_exact(&mut buf).unwrap(); | |
673 | pkts.add_data(&buf); | |
674 | } | |
675 | let stream = pkts.parse_stream(0).unwrap(); | |
676 | let mut pkt_sizes2 = Vec::new(); | |
677 | let mut piter = pkt_sizes.iter(); | |
678 | loop { | |
679 | let res = pkts.get_packet(stream.clone()); | |
680 | match res { | |
681 | Ok(Some(pkt)) => { | |
682 | assert_eq!(*piter.next().unwrap(), pkt.get_buffer().len()); | |
683 | pkt_sizes2.push(pkt.get_buffer().len()); | |
684 | continue; | |
685 | }, | |
686 | Ok(None) | Err(DecoderError::ShortData) => {}, | |
687 | Err(err) => { | |
688 | println!("error {:?}", err); | |
689 | panic!("packetising error"); | |
690 | }, | |
691 | }; | |
692 | let ret = file.read(&mut buf); | |
693 | match ret { | |
694 | Ok(0) => { | |
695 | let res = pkts.get_packet(stream.clone()); | |
696 | match res { | |
697 | Ok(Some(pkt)) => { | |
698 | assert_eq!(*piter.next().unwrap(), pkt.get_buffer().len()); | |
699 | pkt_sizes2.push(pkt.get_buffer().len()); | |
700 | continue; | |
701 | }, | |
702 | Ok(None) | Err(DecoderError::ShortData) => break, | |
703 | Err(err) => { | |
704 | println!("error {:?}", err); | |
705 | panic!("packetising error"); | |
706 | }, | |
707 | }; | |
708 | }, | |
709 | Ok(size) => pkts.add_data(&buf[..size]), | |
710 | Err(err) => { | |
711 | if err.kind() == std::io::ErrorKind::UnexpectedEof { | |
712 | let res = pkts.get_packet(stream.clone()); | |
713 | match res { | |
714 | Ok(Some(pkt)) => { | |
715 | assert_eq!(*piter.next().unwrap(), pkt.get_buffer().len()); | |
716 | pkt_sizes2.push(pkt.get_buffer().len()); | |
717 | continue; | |
718 | }, | |
719 | Ok(None) | Err(DecoderError::ShortData) => break, | |
720 | Err(err) => { | |
721 | println!("error {:?}", err); | |
722 | panic!("packetising error"); | |
723 | }, | |
724 | }; | |
725 | } else { | |
726 | println!(" {:?}", err.kind()); | |
727 | panic!("i/o error!"); | |
728 | } | |
729 | }, | |
730 | }; | |
731 | } | |
732 | assert_eq!(pkt_sizes.len(), pkt_sizes2.len()); | |
733 | } | |
87927c57 KS |
734 | } |
735 | ||
736 | fn update_crc8(crc: u8, byte: u8) -> u8 { | |
737 | CRC8_TABLE[(crc ^ byte) as usize] | |
738 | } | |
739 | ||
740 | fn update_crc16(crc: u16, byte: u8) -> u16 { | |
741 | (crc << 8) ^ CRC16_TABLE[(((crc >> 8) as u8) ^ byte) as usize] | |
742 | } | |
743 | ||
744 | const CRC8_TABLE: [u8; 256] = [ | |
745 | 0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, | |
afede4c7 KS |
746 | 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D, |
747 | 0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, | |
748 | 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D, | |
749 | 0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, | |
750 | 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD, | |
751 | 0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, | |
752 | 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD, | |
753 | 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, | |
754 | 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA, | |
755 | 0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, | |
756 | 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A, | |
757 | 0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, | |
758 | 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A, | |
759 | 0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, | |
760 | 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A, | |
761 | 0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, | |
762 | 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4, | |
763 | 0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, | |
764 | 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4, | |
765 | 0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, | |
766 | 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44, | |
767 | 0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, | |
768 | 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34, | |
769 | 0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, | |
770 | 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63, | |
771 | 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, | |
772 | 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13, | |
773 | 0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, | |
774 | 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83, | |
775 | 0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, | |
87927c57 KS |
776 | 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3 |
777 | ]; | |
778 | ||
779 | const CRC16_TABLE: [u16; 256] = [ | |
780 | 0x0000, 0x8005, 0x800F, 0x000A, 0x801B, 0x001E, 0x0014, 0x8011, | |
781 | 0x8033, 0x0036, 0x003C, 0x8039, 0x0028, 0x802D, 0x8027, 0x0022, | |
782 | 0x8063, 0x0066, 0x006C, 0x8069, 0x0078, 0x807D, 0x8077, 0x0072, | |
783 | 0x0050, 0x8055, 0x805F, 0x005A, 0x804B, 0x004E, 0x0044, 0x8041, | |
784 | 0x80C3, 0x00C6, 0x00CC, 0x80C9, 0x00D8, 0x80DD, 0x80D7, 0x00D2, | |
785 | 0x00F0, 0x80F5, 0x80FF, 0x00FA, 0x80EB, 0x00EE, 0x00E4, 0x80E1, | |
786 | 0x00A0, 0x80A5, 0x80AF, 0x00AA, 0x80BB, 0x00BE, 0x00B4, 0x80B1, | |
787 | 0x8093, 0x0096, 0x009C, 0x8099, 0x0088, 0x808D, 0x8087, 0x0082, | |
788 | 0x8183, 0x0186, 0x018C, 0x8189, 0x0198, 0x819D, 0x8197, 0x0192, | |
789 | 0x01B0, 0x81B5, 0x81BF, 0x01BA, 0x81AB, 0x01AE, 0x01A4, 0x81A1, | |
790 | 0x01E0, 0x81E5, 0x81EF, 0x01EA, 0x81FB, 0x01FE, 0x01F4, 0x81F1, | |
791 | 0x81D3, 0x01D6, 0x01DC, 0x81D9, 0x01C8, 0x81CD, 0x81C7, 0x01C2, | |
792 | 0x0140, 0x8145, 0x814F, 0x014A, 0x815B, 0x015E, 0x0154, 0x8151, | |
793 | 0x8173, 0x0176, 0x017C, 0x8179, 0x0168, 0x816D, 0x8167, 0x0162, | |
794 | 0x8123, 0x0126, 0x012C, 0x8129, 0x0138, 0x813D, 0x8137, 0x0132, | |
795 | 0x0110, 0x8115, 0x811F, 0x011A, 0x810B, 0x010E, 0x0104, 0x8101, | |
796 | 0x8303, 0x0306, 0x030C, 0x8309, 0x0318, 0x831D, 0x8317, 0x0312, | |
797 | 0x0330, 0x8335, 0x833F, 0x033A, 0x832B, 0x032E, 0x0324, 0x8321, | |
798 | 0x0360, 0x8365, 0x836F, 0x036A, 0x837B, 0x037E, 0x0374, 0x8371, | |
799 | 0x8353, 0x0356, 0x035C, 0x8359, 0x0348, 0x834D, 0x8347, 0x0342, | |
800 | 0x03C0, 0x83C5, 0x83CF, 0x03CA, 0x83DB, 0x03DE, 0x03D4, 0x83D1, | |
801 | 0x83F3, 0x03F6, 0x03FC, 0x83F9, 0x03E8, 0x83ED, 0x83E7, 0x03E2, | |
802 | 0x83A3, 0x03A6, 0x03AC, 0x83A9, 0x03B8, 0x83BD, 0x83B7, 0x03B2, | |
803 | 0x0390, 0x8395, 0x839F, 0x039A, 0x838B, 0x038E, 0x0384, 0x8381, | |
804 | 0x0280, 0x8285, 0x828F, 0x028A, 0x829B, 0x029E, 0x0294, 0x8291, | |
805 | 0x82B3, 0x02B6, 0x02BC, 0x82B9, 0x02A8, 0x82AD, 0x82A7, 0x02A2, | |
806 | 0x82E3, 0x02E6, 0x02EC, 0x82E9, 0x02F8, 0x82FD, 0x82F7, 0x02F2, | |
807 | 0x02D0, 0x82D5, 0x82DF, 0x02DA, 0x82CB, 0x02CE, 0x02C4, 0x82C1, | |
808 | 0x8243, 0x0246, 0x024C, 0x8249, 0x0258, 0x825D, 0x8257, 0x0252, | |
809 | 0x0270, 0x8275, 0x827F, 0x027A, 0x826B, 0x026E, 0x0264, 0x8261, | |
810 | 0x0220, 0x8225, 0x822F, 0x022A, 0x823B, 0x023E, 0x0234, 0x8231, | |
811 | 0x8213, 0x0216, 0x021C, 0x8219, 0x0208, 0x820D, 0x8207, 0x0202 | |
812 | ]; |