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1 | use nihav_core::formats::*; | |
2 | use nihav_core::frame::*; | |
3 | use nihav_core::codecs::*; | |
4 | use nihav_codec_support::dsp::mdct::IMDCT; | |
5 | use nihav_codec_support::dsp::window::*; | |
6 | use nihav_core::io::bitreader::*; | |
7 | use nihav_core::io::byteio::*; | |
8 | use std::str::FromStr; | |
9 | ||
10 | mod coeff_read; | |
11 | use coeff_read::*; | |
12 | mod info; | |
13 | use info::*; | |
14 | #[allow(clippy::excessive_precision)] | |
15 | mod tables; | |
16 | use tables::*; | |
17 | mod tools; | |
18 | use tools::*; | |
19 | ||
20 | const MAX_WINDOWS: usize = 8; | |
21 | const MAX_SFBS: usize = 64; | |
22 | ||
23 | #[derive(Clone,Copy)] | |
24 | pub struct ICSInfo { | |
25 | window_sequence: u8, | |
26 | prev_window_sequence: u8, | |
27 | window_shape: bool, | |
28 | prev_window_shape: bool, | |
29 | scale_factor_grouping: [bool; MAX_WINDOWS], | |
30 | group_start: [usize; MAX_WINDOWS], | |
31 | window_groups: usize, | |
32 | num_windows: usize, | |
33 | max_sfb: usize, | |
34 | predictor_data: Option<LTPData>, | |
35 | long_win: bool, | |
36 | } | |
37 | ||
38 | const ONLY_LONG_SEQUENCE: u8 = 0; | |
39 | const LONG_START_SEQUENCE: u8 = 1; | |
40 | const EIGHT_SHORT_SEQUENCE: u8 = 2; | |
41 | const LONG_STOP_SEQUENCE: u8 = 3; | |
42 | ||
43 | impl ICSInfo { | |
44 | fn new() -> Self { | |
45 | Self { | |
46 | window_sequence: 0, | |
47 | prev_window_sequence: 0, | |
48 | window_shape: false, | |
49 | prev_window_shape: false, | |
50 | scale_factor_grouping: [false; MAX_WINDOWS], | |
51 | group_start: [0; MAX_WINDOWS], | |
52 | num_windows: 0, | |
53 | window_groups: 0, | |
54 | max_sfb: 0, | |
55 | predictor_data: None, | |
56 | long_win: true, | |
57 | } | |
58 | } | |
59 | fn decode_ics_info(&mut self, br: &mut BitReader) -> DecoderResult<()> { | |
60 | self.prev_window_sequence = self.window_sequence; | |
61 | self.prev_window_shape = self.window_shape; | |
62 | let ics_reserved_bit = br.read(1)?; | |
63 | validate!(ics_reserved_bit == 0); | |
64 | self.window_sequence = br.read(2)? as u8; | |
65 | match self.prev_window_sequence { | |
66 | ONLY_LONG_SEQUENCE | LONG_STOP_SEQUENCE => { | |
67 | if (self.window_sequence != ONLY_LONG_SEQUENCE) && | |
68 | (self.window_sequence != LONG_START_SEQUENCE) { | |
69 | println!("incorrect previous window"); | |
70 | } | |
71 | }, | |
72 | LONG_START_SEQUENCE | EIGHT_SHORT_SEQUENCE => { | |
73 | if (self.window_sequence != EIGHT_SHORT_SEQUENCE) && | |
74 | (self.window_sequence != LONG_STOP_SEQUENCE) { | |
75 | println!("incorrect previous window"); | |
76 | } | |
77 | }, | |
78 | _ => {}, | |
79 | }; | |
80 | self.window_shape = br.read_bool()?; | |
81 | self.window_groups = 1; | |
82 | if self.window_sequence == EIGHT_SHORT_SEQUENCE { | |
83 | self.long_win = false; | |
84 | self.num_windows = 8; | |
85 | self.max_sfb = br.read(4)? as usize; | |
86 | for i in 0..MAX_WINDOWS-1 { | |
87 | self.scale_factor_grouping[i] = br.read_bool()?; | |
88 | if !self.scale_factor_grouping[i] { | |
89 | self.group_start[self.window_groups] = i + 1; | |
90 | self.window_groups += 1; | |
91 | } | |
92 | } | |
93 | } else { | |
94 | self.long_win = true; | |
95 | self.num_windows = 1; | |
96 | self.max_sfb = br.read(6)? as usize; | |
97 | self.predictor_data = LTPData::read(br)?; | |
98 | } | |
99 | Ok(()) | |
100 | } | |
101 | fn get_group_start(&self, g: usize) -> usize { | |
102 | if g == 0 { | |
103 | 0 | |
104 | } else if g >= self.window_groups { | |
105 | if self.long_win { 1 } else { 8 } | |
106 | } else { | |
107 | self.group_start[g] | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
112 | #[derive(Clone)] | |
113 | struct ICS { | |
114 | global_gain: u8, | |
115 | info: ICSInfo, | |
116 | pulse_data: Option<PulseData>, | |
117 | tns_data: Option<TNSData>, | |
118 | gain_control: Option<GainControlData>, | |
119 | sect_cb: [[u8; MAX_SFBS]; MAX_WINDOWS], | |
120 | sect_len: [[usize; MAX_SFBS]; MAX_WINDOWS], | |
121 | sfb_cb: [[u8; MAX_SFBS]; MAX_WINDOWS], | |
122 | num_sec: [usize; MAX_WINDOWS], | |
123 | scales: [[u8; MAX_SFBS]; MAX_WINDOWS], | |
124 | sbinfo: GASubbandInfo, | |
125 | coeffs: [f32; 1024], | |
126 | delay: [f32; 1024], | |
127 | } | |
128 | ||
129 | const INTENSITY_SCALE_MIN: i16 = -155; | |
130 | impl ICS { | |
131 | fn new(sbinfo: GASubbandInfo) -> Self { | |
132 | Self { | |
133 | global_gain: 0, | |
134 | info: ICSInfo::new(), | |
135 | pulse_data: None, | |
136 | tns_data: None, | |
137 | gain_control: None, | |
138 | sect_cb: [[0; MAX_SFBS]; MAX_WINDOWS], | |
139 | sect_len: [[0; MAX_SFBS]; MAX_WINDOWS], | |
140 | sfb_cb: [[0; MAX_SFBS]; MAX_WINDOWS], | |
141 | scales: [[0; MAX_SFBS]; MAX_WINDOWS], | |
142 | num_sec: [0; MAX_WINDOWS], | |
143 | sbinfo, | |
144 | coeffs: [0.0; 1024], | |
145 | delay: [0.0; 1024], | |
146 | } | |
147 | } | |
148 | fn decode_section_data(&mut self, br: &mut BitReader, may_have_intensity: bool) -> DecoderResult<()> { | |
149 | let sect_bits = if self.info.long_win { 5 } else { 3 }; | |
150 | let sect_esc_val = (1 << sect_bits) - 1; | |
151 | ||
152 | for g in 0..self.info.window_groups { | |
153 | let mut k = 0; | |
154 | let mut l = 0; | |
155 | while k < self.info.max_sfb { | |
156 | self.sect_cb[g][l] = br.read(4)? as u8; | |
157 | self.sect_len[g][l] = 0; | |
158 | validate!(self.sect_cb[g][l] != RESERVED_HCB); | |
159 | if ((self.sect_cb[g][l] == INTENSITY_HCB) || (self.sect_cb[g][l] == INTENSITY_HCB2)) && !may_have_intensity { | |
160 | return Err(DecoderError::InvalidData); | |
161 | } | |
162 | loop { | |
163 | let sect_len_incr = br.read(sect_bits)? as usize; | |
164 | self.sect_len[g][l] += sect_len_incr; | |
165 | if sect_len_incr < sect_esc_val { break; } | |
166 | } | |
167 | validate!(k + self.sect_len[g][l] <= self.info.max_sfb); | |
168 | for _ in 0..self.sect_len[g][l] { | |
169 | self.sfb_cb[g][k] = self.sect_cb[g][l]; | |
170 | k += 1; | |
171 | } | |
172 | l += 1; | |
173 | } | |
174 | self.num_sec[g] = l; | |
175 | } | |
176 | Ok(()) | |
177 | } | |
178 | fn is_intensity(&self, g: usize, sfb: usize) -> bool { | |
179 | (self.sfb_cb[g][sfb] == INTENSITY_HCB) || (self.sfb_cb[g][sfb] == INTENSITY_HCB2) | |
180 | } | |
181 | fn get_intensity_dir(&self, g: usize, sfb: usize) -> bool { | |
182 | self.sfb_cb[g][sfb] == INTENSITY_HCB | |
183 | } | |
184 | fn decode_scale_factor_data(&mut self, br: &mut BitReader, codebooks: &Codebooks) -> DecoderResult<()> { | |
185 | decode_scale_factor_data(br, &mut self.scales, self.global_gain, &self.info, &self.sfb_cb, codebooks) | |
186 | } | |
187 | fn get_band_start(&self, swb: usize) -> usize { | |
188 | if self.info.long_win { | |
189 | self.sbinfo.long_bands[swb] | |
190 | } else { | |
191 | self.sbinfo.short_bands[swb] | |
192 | } | |
193 | } | |
194 | fn get_num_bands(&self) -> usize { | |
195 | if self.info.long_win { | |
196 | self.sbinfo.long_bands.len() - 1 | |
197 | } else { | |
198 | self.sbinfo.short_bands.len() - 1 | |
199 | } | |
200 | } | |
201 | fn decode_spectrum(&mut self, br: &mut BitReader, codebooks: &Codebooks) -> DecoderResult<()> { | |
202 | self.coeffs = [0.0; 1024]; | |
203 | decode_spectrum(br, &mut self.coeffs, &self.scales, &self.info, &self.sbinfo, &self.sfb_cb, codebooks) | |
204 | } | |
205 | fn iquant(val: f32) -> f32 { | |
206 | if val < 0.0 { | |
207 | -((-val).powf(4.0 / 3.0)) | |
208 | } else { | |
209 | val.powf(4.0 / 3.0) | |
210 | } | |
211 | } | |
212 | fn place_pulses(&mut self) { | |
213 | if let Some(ref pdata) = self.pulse_data { | |
214 | if pdata.pulse_start_sfb >= self.sbinfo.long_bands.len() - 1 { return; } | |
215 | let mut k = self.get_band_start(pdata.pulse_start_sfb); | |
216 | let mut band = pdata.pulse_start_sfb; | |
217 | for pno in 0..pdata.number_pulse { | |
218 | k += pdata.pulse_offset[pno] as usize; | |
219 | if k >= 1024 { return; } | |
220 | while self.get_band_start(band + 1) <= k { band += 1; } | |
221 | let scale = get_scale(self.scales[0][band]); | |
222 | let mut base = self.coeffs[k]; | |
223 | if base != 0.0 { | |
224 | base = requant(self.coeffs[k], scale); | |
225 | } | |
226 | if base > 0.0 { | |
227 | base += f32::from(pdata.pulse_amp[pno]); | |
228 | } else { | |
229 | base -= f32::from(pdata.pulse_amp[pno]); | |
230 | } | |
231 | self.coeffs[k] = Self::iquant(base) * scale; | |
232 | } | |
233 | } | |
234 | } | |
235 | fn decode_ics(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType, common_window: bool, may_have_intensity: bool) -> DecoderResult<()> { | |
236 | self.global_gain = br.read(8)? as u8; | |
237 | if !common_window { | |
238 | self.info.decode_ics_info(br)?; | |
239 | } | |
240 | self.decode_section_data(br, may_have_intensity)?; | |
241 | self.decode_scale_factor_data(br, codebooks)?; | |
242 | self.pulse_data = PulseData::read(br)?; | |
243 | validate!(self.pulse_data.is_none() || self.info.long_win); | |
244 | let tns_max_order; | |
245 | if !self.info.long_win { | |
246 | tns_max_order = 7; | |
247 | } else if m4atype == M4AType::LC { | |
248 | tns_max_order = 12; | |
249 | } else { | |
250 | tns_max_order = TNS_MAX_ORDER; | |
251 | } | |
252 | self.tns_data = TNSData::read(br, self.info.long_win, self.info.num_windows, tns_max_order)?; | |
253 | if m4atype == M4AType::SSR { | |
254 | self.gain_control = GainControlData::read(br)?; | |
255 | } else { | |
256 | let gain_control_data_present = br.read_bool()?; | |
257 | validate!(!gain_control_data_present); | |
258 | } | |
259 | self.decode_spectrum(br, codebooks)?; | |
260 | Ok(()) | |
261 | } | |
262 | fn synth_channel(&mut self, dsp: &mut DSP, dst: &mut [f32], srate_idx: usize) { | |
263 | self.place_pulses(); | |
264 | if let Some(ref tns_data) = self.tns_data { | |
265 | let tns_max_bands = TNSData::get_max_bands(self.info.long_win, srate_idx).min(self.info.max_sfb); | |
266 | for w in 0..self.info.num_windows { | |
267 | let mut bottom = self.get_num_bands(); | |
268 | for f in 0..tns_data.n_filt[w] { | |
269 | let top = bottom; | |
270 | bottom = if top >= tns_data.coeffs[w][f].length { top - tns_data.coeffs[w][f].length } else { 0 }; | |
271 | let order = tns_data.coeffs[w][f].order; | |
272 | if order == 0 { continue; } | |
273 | let start = w * 128 + self.get_band_start(tns_max_bands.min(bottom)); | |
274 | let end = w * 128 + self.get_band_start(tns_max_bands.min(top)); | |
275 | tns_data.apply(&mut self.coeffs, w, f, start, end); | |
276 | } | |
277 | } | |
278 | } | |
279 | dsp.synth(&self.coeffs, &mut self.delay, self.info.window_sequence, self.info.window_shape, self.info.prev_window_shape, dst); | |
280 | } | |
281 | } | |
282 | ||
283 | #[derive(Clone)] | |
284 | struct ChannelPair { | |
285 | pair: bool, | |
286 | channel: usize, | |
287 | common_window: bool, | |
288 | ms_mask_present: u8, | |
289 | ms_used: [[bool; MAX_SFBS]; MAX_WINDOWS], | |
290 | ics: [ICS; 2], | |
291 | } | |
292 | ||
293 | impl ChannelPair { | |
294 | fn new(pair: bool, channel: usize, sbinfo: GASubbandInfo) -> Self { | |
295 | Self { | |
296 | pair, channel, | |
297 | common_window: false, | |
298 | ms_mask_present: 0, | |
299 | ms_used: [[false; MAX_SFBS]; MAX_WINDOWS], | |
300 | ics: [ICS::new(sbinfo), ICS::new(sbinfo)], | |
301 | } | |
302 | } | |
303 | fn decode_ga_sce(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType) -> DecoderResult<()> { | |
304 | self.ics[0].decode_ics(br, codebooks, m4atype, false, false)?; | |
305 | Ok(()) | |
306 | } | |
307 | fn decode_ga_cpe(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType) -> DecoderResult<()> { | |
308 | let common_window = br.read_bool()?; | |
309 | self.common_window = common_window; | |
310 | if common_window { | |
311 | self.ics[0].info.decode_ics_info(br)?; | |
312 | self.ms_mask_present = br.read(2)? as u8; | |
313 | validate!(self.ms_mask_present != 3); | |
314 | if self.ms_mask_present == 1 { | |
315 | for g in 0..self.ics[0].info.window_groups { | |
316 | for sfb in 0..self.ics[0].info.max_sfb { | |
317 | self.ms_used[g][sfb] = br.read_bool()?; | |
318 | } | |
319 | } | |
320 | } | |
321 | self.ics[1].info = self.ics[0].info; | |
322 | } | |
323 | self.ics[0].decode_ics(br, codebooks, m4atype, common_window, true)?; | |
324 | self.ics[1].decode_ics(br, codebooks, m4atype, common_window, true)?; | |
325 | if common_window && self.ms_mask_present != 0 { | |
326 | let mut g = 0; | |
327 | for w in 0..self.ics[0].info.num_windows { | |
328 | if w > 0 && !self.ics[0].info.scale_factor_grouping[w - 1] { | |
329 | g += 1; | |
330 | } | |
331 | for sfb in 0..self.ics[0].info.max_sfb { | |
332 | let start = w * 128 + self.ics[0].get_band_start(sfb); | |
333 | let end = w * 128 + self.ics[0].get_band_start(sfb + 1); | |
334 | if self.ics[0].is_intensity(g, sfb) { | |
335 | let invert = (self.ms_mask_present == 1) && self.ms_used[g][sfb]; | |
336 | let dir = self.ics[0].get_intensity_dir(g, sfb) ^ invert; | |
337 | let scale = 0.5f32.powf(0.25 * (f32::from(self.ics[0].scales[g][sfb]) + f32::from(INTENSITY_SCALE_MIN))); | |
338 | if !dir { | |
339 | for i in start..end { | |
340 | self.ics[1].coeffs[i] = scale * self.ics[0].coeffs[i]; | |
341 | } | |
342 | } else { | |
343 | for i in start..end { | |
344 | self.ics[1].coeffs[i] = -scale * self.ics[0].coeffs[i]; | |
345 | } | |
346 | } | |
347 | } else if (self.ms_mask_present == 2) || self.ms_used[g][sfb] { | |
348 | for i in start..end { | |
349 | let tmp = self.ics[0].coeffs[i] - self.ics[1].coeffs[i]; | |
350 | self.ics[0].coeffs[i] += self.ics[1].coeffs[i]; | |
351 | self.ics[1].coeffs[i] = tmp; | |
352 | } | |
353 | } | |
354 | } | |
355 | } | |
356 | } | |
357 | Ok(()) | |
358 | } | |
359 | fn synth_audio(&mut self, dsp: &mut DSP, abuf: &mut NABufferType, srate_idx: usize) { | |
360 | let mut adata = abuf.get_abuf_f32().unwrap(); | |
361 | let output = adata.get_data_mut().unwrap(); | |
362 | let off0 = abuf.get_offset(self.channel); | |
363 | let off1 = abuf.get_offset(self.channel + 1); | |
364 | self.ics[0].synth_channel(dsp, &mut output[off0..], srate_idx); | |
365 | if self.pair { | |
366 | self.ics[1].synth_channel(dsp, &mut output[off1..], srate_idx); | |
367 | } | |
368 | } | |
369 | } | |
370 | ||
371 | struct DSP { | |
372 | kbd_long_win: [f32; 1024], | |
373 | kbd_short_win: [f32; 128], | |
374 | sine_long_win: [f32; 1024], | |
375 | sine_short_win: [f32; 128], | |
376 | imdct_long: IMDCT, | |
377 | imdct_short: IMDCT, | |
378 | tmp: [f32; 2048], | |
379 | ew_buf: [f32; 1152], | |
380 | } | |
381 | ||
382 | const SHORT_WIN_POINT0: usize = 512 - 64; | |
383 | const SHORT_WIN_POINT1: usize = 512 + 64; | |
384 | ||
385 | impl DSP { | |
386 | fn new() -> Self { | |
387 | let mut kbd_long_win: [f32; 1024] = [0.0; 1024]; | |
388 | let mut kbd_short_win: [f32; 128] = [0.0; 128]; | |
389 | generate_window(WindowType::KaiserBessel(4.0), 1.0, 1024, true, &mut kbd_long_win); | |
390 | generate_window(WindowType::KaiserBessel(6.0), 1.0, 128, true, &mut kbd_short_win); | |
391 | let mut sine_long_win: [f32; 1024] = [0.0; 1024]; | |
392 | let mut sine_short_win: [f32; 128] = [0.0; 128]; | |
393 | generate_window(WindowType::Sine, 1.0, 1024, true, &mut sine_long_win); | |
394 | generate_window(WindowType::Sine, 1.0, 128, true, &mut sine_short_win); | |
395 | Self { | |
396 | kbd_long_win, kbd_short_win, | |
397 | sine_long_win, sine_short_win, | |
398 | imdct_long: IMDCT::new(1024 * 2, true), | |
399 | imdct_short: IMDCT::new(128 * 2, true), | |
400 | tmp: [0.0; 2048], ew_buf: [0.0; 1152], | |
401 | } | |
402 | } | |
403 | #[allow(clippy::cognitive_complexity)] | |
404 | fn synth(&mut self, coeffs: &[f32; 1024], delay: &mut [f32; 1024], seq: u8, window_shape: bool, prev_window_shape: bool, dst: &mut [f32]) { | |
405 | let long_win = if window_shape { &self.kbd_long_win } else { &self.sine_long_win }; | |
406 | let short_win = if window_shape { &self.kbd_short_win } else { &self.sine_short_win }; | |
407 | let left_long_win = if prev_window_shape { &self.kbd_long_win } else { &self.sine_long_win }; | |
408 | let left_short_win = if prev_window_shape { &self.kbd_short_win } else { &self.sine_short_win }; | |
409 | if seq != EIGHT_SHORT_SEQUENCE { | |
410 | self.imdct_long.imdct(coeffs, &mut self.tmp); | |
411 | } else { | |
412 | for (ain, aout) in coeffs.chunks(128).zip(self.tmp.chunks_mut(256)) { | |
413 | self.imdct_short.imdct(ain, aout); | |
414 | } | |
415 | self.ew_buf = [0.0; 1152]; | |
416 | for (w, src) in self.tmp.chunks(256).enumerate() { | |
417 | if w > 0 { | |
418 | for i in 0..128 { | |
419 | self.ew_buf[w * 128 + i] += src[i] * short_win[i]; | |
420 | } | |
421 | } else { // to be left-windowed | |
422 | for i in 0..128 { | |
423 | self.ew_buf[i] = src[i]; | |
424 | } | |
425 | } | |
426 | for i in 0..128 { | |
427 | self.ew_buf[w * 128 + i + 128] += src[i + 128] * short_win[127 - i]; | |
428 | } | |
429 | } | |
430 | } | |
431 | if seq == ONLY_LONG_SEQUENCE { // should be the most common case | |
432 | for i in 0..1024 { | |
433 | dst[i] = delay[i] + self.tmp[i] * left_long_win[i]; | |
434 | delay[i] = self.tmp[i + 1024] * long_win[1023 - i]; | |
435 | } | |
436 | return; | |
437 | } | |
438 | // output new data | |
439 | match seq { | |
440 | ONLY_LONG_SEQUENCE | LONG_START_SEQUENCE => { | |
441 | for i in 0..1024 { | |
442 | dst[i] = self.tmp[i] * left_long_win[i] + delay[i]; | |
443 | } | |
444 | }, | |
445 | EIGHT_SHORT_SEQUENCE => { | |
446 | for i in 0..SHORT_WIN_POINT0 { | |
447 | dst[i] = delay[i]; | |
448 | } | |
449 | for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 { | |
450 | let j = i - SHORT_WIN_POINT0; | |
451 | dst[i] = delay[i] + self.ew_buf[j] * left_short_win[j]; | |
452 | } | |
453 | for i in SHORT_WIN_POINT1..1024 { | |
454 | let j = i - SHORT_WIN_POINT0; | |
455 | dst[i] = self.ew_buf[j]; | |
456 | } | |
457 | }, | |
458 | LONG_STOP_SEQUENCE => { | |
459 | for i in 0..SHORT_WIN_POINT0 { | |
460 | dst[i] = delay[i]; | |
461 | } | |
462 | for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 { | |
463 | dst[i] = delay[i] + self.tmp[i] * left_short_win[i - SHORT_WIN_POINT0]; | |
464 | } | |
465 | for i in SHORT_WIN_POINT1..1024 { | |
466 | dst[i] = self.tmp[i]; | |
467 | } | |
468 | }, | |
469 | _ => unreachable!(""), | |
470 | }; | |
471 | // save delay | |
472 | match seq { | |
473 | ONLY_LONG_SEQUENCE | LONG_STOP_SEQUENCE => { | |
474 | for i in 0..1024 { | |
475 | delay[i] = self.tmp[i + 1024] * long_win[1023 - i]; | |
476 | } | |
477 | }, | |
478 | EIGHT_SHORT_SEQUENCE => { | |
479 | for i in 0..SHORT_WIN_POINT1 { // last part is already windowed | |
480 | delay[i] = self.ew_buf[i + 512+64]; | |
481 | } | |
482 | for i in SHORT_WIN_POINT1..1024 { | |
483 | delay[i] = 0.0; | |
484 | } | |
485 | }, | |
486 | LONG_START_SEQUENCE => { | |
487 | for i in 0..SHORT_WIN_POINT0 { | |
488 | delay[i] = self.tmp[i + 1024]; | |
489 | } | |
490 | for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 { | |
491 | delay[i] = self.tmp[i + 1024] * short_win[127 - (i - SHORT_WIN_POINT0)]; | |
492 | } | |
493 | for i in SHORT_WIN_POINT1..1024 { | |
494 | delay[i] = 0.0; | |
495 | } | |
496 | }, | |
497 | _ => unreachable!(""), | |
498 | }; | |
499 | } | |
500 | } | |
501 | ||
502 | struct AACDecoder { | |
503 | info: NACodecInfoRef, | |
504 | chmap: NAChannelMap, | |
505 | m4ainfo: M4AInfo, | |
506 | pairs: Vec<ChannelPair>, | |
507 | codebooks: Codebooks, | |
508 | dsp: DSP, | |
509 | sbinfo: GASubbandInfo, | |
510 | } | |
511 | ||
512 | impl AACDecoder { | |
513 | fn new() -> Self { | |
514 | AACDecoder { | |
515 | info: NACodecInfo::new_dummy(), | |
516 | chmap: NAChannelMap::new(), | |
517 | m4ainfo: M4AInfo::new(), | |
518 | pairs: Vec::new(), | |
519 | codebooks: Codebooks::new(), | |
520 | dsp: DSP::new(), | |
521 | sbinfo: AAC_SUBBAND_INFO[0], | |
522 | } | |
523 | } | |
524 | fn set_pair(&mut self, pair_no: usize, channel: usize, pair: bool) -> DecoderResult<()> { | |
525 | if self.pairs.len() <= pair_no { | |
526 | self.pairs.push(ChannelPair::new(pair, channel, self.sbinfo)); | |
527 | } else { | |
528 | validate!(self.pairs[pair_no].channel == channel); | |
529 | validate!(self.pairs[pair_no].pair == pair); | |
530 | } | |
531 | validate!(if pair { channel + 1 } else { channel } < self.m4ainfo.channels); | |
532 | Ok(()) | |
533 | } | |
534 | fn decode_ga(&mut self, br: &mut BitReader, abuf: &mut NABufferType) -> DecoderResult<()> { | |
535 | let mut cur_pair = 0; | |
536 | let mut cur_ch = 0; | |
537 | while br.left() > 3 { | |
538 | let id = br.read(3)?; | |
539 | match id { | |
540 | 0 => { // ID_SCE | |
541 | let _tag = br.read(4)?; | |
542 | self.set_pair(cur_pair, cur_ch, false)?; | |
543 | self.pairs[cur_pair].decode_ga_sce(br, &self.codebooks, self.m4ainfo.otype)?; | |
544 | cur_pair += 1; | |
545 | cur_ch += 1; | |
546 | }, | |
547 | 1 => { // ID_CPE | |
548 | let _tag = br.read(4)?; | |
549 | self.set_pair(cur_pair, cur_ch, true)?; | |
550 | self.pairs[cur_pair].decode_ga_cpe(br, &self.codebooks, self.m4ainfo.otype)?; | |
551 | cur_pair += 1; | |
552 | cur_ch += 2; | |
553 | }, | |
554 | 2 => { // ID_CCE | |
555 | unimplemented!("coupling channel element"); | |
556 | }, | |
557 | 3 => { // ID_LFE | |
558 | let _tag = br.read(4)?; | |
559 | self.set_pair(cur_pair, cur_ch, false)?; | |
560 | self.pairs[cur_pair].decode_ga_sce(br, &self.codebooks, self.m4ainfo.otype)?; | |
561 | cur_pair += 1; | |
562 | cur_ch += 1; | |
563 | }, | |
564 | 4 => { // ID_DSE | |
565 | let _id = br.read(4)?; | |
566 | let align = br.read_bool()?; | |
567 | let mut count = br.read(8)? as u32; | |
568 | if count == 255 { count += br.read(8)? as u32; } | |
569 | if align { br.align(); } | |
570 | br.skip(count * 8)?; // no SBR payload or such | |
571 | }, | |
572 | 5 => { // ID_PCE | |
573 | unimplemented!("program config"); | |
574 | }, | |
575 | 6 => { // ID_FIL | |
576 | let mut count = br.read(4)? as usize; | |
577 | if count == 15 { | |
578 | count += br.read(8)? as usize; | |
579 | count -= 1; | |
580 | } | |
581 | for _ in 0..count { | |
582 | // ext payload | |
583 | br.skip(8)?; | |
584 | } | |
585 | }, | |
586 | 7 => { // ID_TERM | |
587 | break; | |
588 | }, | |
589 | _ => { unreachable!(); }, | |
590 | }; | |
591 | } | |
592 | let srate_idx = GASubbandInfo::find_idx(self.m4ainfo.srate); | |
593 | for pair in 0..cur_pair { | |
594 | self.pairs[pair].synth_audio(&mut self.dsp, abuf, srate_idx); | |
595 | } | |
596 | Ok(()) | |
597 | } | |
598 | } | |
599 | ||
600 | impl NADecoder for AACDecoder { | |
601 | fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { | |
602 | if let NACodecTypeInfo::Audio(_) = info.get_properties() { | |
603 | let edata = info.get_extradata().unwrap(); | |
604 | validate!(edata.len() >= 2); | |
605 | ||
606 | //print!("edata:"); for s in edata.iter() { print!(" {:02X}", *s);}println!(""); | |
607 | if (edata.len() > 12) && (&edata[4..8] == b"esds") { | |
608 | let mut mr = MemoryReader::new_read(edata.as_slice()); | |
609 | let mut br = ByteReader::new(&mut mr); | |
610 | let esds_size = br.read_u32be()? as usize; | |
611 | validate!(esds_size <= edata.len()); | |
612 | br.read_skip(8)?; | |
613 | let mut info_start = 0; | |
614 | let mut info_size = 0; | |
615 | while br.tell() < (esds_size as u64) { | |
616 | let tag = br.read_byte()?; | |
617 | let mut size = 0; | |
618 | loop { | |
619 | let b = br.read_byte()?; | |
620 | size = (size << 7) | u64::from(b & 0x7F); | |
621 | validate!(br.tell() + size <= (esds_size as u64)); | |
622 | if (b & 0x80) == 0 { | |
623 | break; | |
624 | } | |
625 | } | |
626 | match tag { | |
627 | 3 => { | |
628 | br.read_u16be()?; | |
629 | let flags = br.read_byte()?; | |
630 | if (flags & 0x80) != 0 { | |
631 | br.read_u16be()?; | |
632 | } | |
633 | if (flags & 0x40) != 0 { | |
634 | let len = br.read_byte()?; | |
635 | br.read_skip(len as usize)?; | |
636 | } | |
637 | if (flags & 0x20) != 0 { | |
638 | br.read_u16be()?; | |
639 | } | |
640 | }, | |
641 | 4 => { | |
642 | let _otype = br.read_byte()?; | |
643 | let _stype = br.read_byte()?; | |
644 | let _flags = br.read_u24be()?; | |
645 | let _max_br = br.read_u32be()?; | |
646 | let _min_br = br.read_u32be()?; | |
647 | }, | |
648 | 5 => { | |
649 | info_start = br.tell() as usize; | |
650 | info_size = size as usize; | |
651 | break; | |
652 | }, | |
653 | _ => br.read_skip(size as usize)?, | |
654 | } | |
655 | } | |
656 | validate!(info_start > 0 && info_size > 0); | |
657 | self.m4ainfo.read(&edata[info_start..][..info_size])?; | |
658 | } else { | |
659 | self.m4ainfo.read(&edata)?; | |
660 | } | |
661 | ||
662 | //println!("{}", self.m4ainfo); | |
663 | if (self.m4ainfo.otype != M4AType::LC) || (self.m4ainfo.channels > 2) || (self.m4ainfo.samples != 1024) { | |
664 | return Err(DecoderError::NotImplemented); | |
665 | } | |
666 | self.sbinfo = GASubbandInfo::find(self.m4ainfo.srate); | |
667 | ||
668 | let ainfo = NAAudioInfo::new(self.m4ainfo.srate, self.m4ainfo.channels as u8, | |
669 | SND_F32P_FORMAT, self.m4ainfo.samples); | |
670 | self.info = info.replace_info(NACodecTypeInfo::Audio(ainfo)); | |
671 | ||
672 | if self.m4ainfo.channels >= DEFAULT_CHANNEL_MAP.len() { | |
673 | return Err(DecoderError::NotImplemented); | |
674 | } | |
675 | let chmap_str = DEFAULT_CHANNEL_MAP[self.m4ainfo.channels]; | |
676 | if chmap_str.is_empty() { return Err(DecoderError::NotImplemented); } | |
677 | self.chmap = NAChannelMap::from_str(chmap_str).unwrap(); | |
678 | ||
679 | Ok(()) | |
680 | } else { | |
681 | Err(DecoderError::InvalidData) | |
682 | } | |
683 | } | |
684 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { | |
685 | let info = pkt.get_stream().get_info(); | |
686 | validate!(info.get_properties().is_audio()); | |
687 | let pktbuf = pkt.get_buffer(); | |
688 | ||
689 | let ainfo = self.info.get_properties().get_audio_info().unwrap(); | |
690 | let mut abuf = alloc_audio_buffer(ainfo, self.m4ainfo.samples, self.chmap.clone())?; | |
691 | ||
692 | let mut br = BitReader::new(&pktbuf, BitReaderMode::BE); | |
693 | match self.m4ainfo.otype { | |
694 | M4AType::LC => { | |
695 | self.decode_ga(&mut br, &mut abuf)?; | |
696 | }, | |
697 | _ => { unimplemented!(""); } | |
698 | } | |
699 | ||
700 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.replace_info(NACodecTypeInfo::Audio(ainfo)), abuf); | |
701 | frm.set_keyframe(true); | |
702 | Ok(frm.into_ref()) | |
703 | } | |
704 | fn flush(&mut self) { | |
705 | for pair in self.pairs.iter_mut() { | |
706 | pair.ics[0].delay = [0.0; 1024]; | |
707 | pair.ics[1].delay = [0.0; 1024]; | |
708 | } | |
709 | } | |
710 | } | |
711 | ||
712 | impl NAOptionHandler for AACDecoder { | |
713 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } | |
714 | fn set_options(&mut self, _options: &[NAOption]) { } | |
715 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } | |
716 | } | |
717 | ||
718 | pub fn get_decoder() -> Box<dyn NADecoder + Send> { | |
719 | Box::new(AACDecoder::new()) | |
720 | } | |
721 | ||
722 | #[cfg(test)] | |
723 | mod test { | |
724 | use nihav_core::codecs::RegisteredDecoders; | |
725 | use nihav_core::demuxers::RegisteredDemuxers; | |
726 | use nihav_codec_support::test::dec_video::test_decode_audio; | |
727 | use crate::mpeg_register_all_decoders; | |
728 | use nihav_realmedia::realmedia_register_all_demuxers; | |
729 | #[test] | |
730 | fn test_aac() { | |
731 | let mut dmx_reg = RegisteredDemuxers::new(); | |
732 | realmedia_register_all_demuxers(&mut dmx_reg); | |
733 | let mut dec_reg = RegisteredDecoders::new(); | |
734 | mpeg_register_all_decoders(&mut dec_reg); | |
735 | ||
736 | // let file = "assets/RV/rv40_weighted_mc.rmvb"; | |
737 | let file = "assets/RV/rv40_weighted_mc_2.rmvb"; | |
738 | test_decode_audio("realmedia", file, Some(12000), None/*Some("aac")*/, &dmx_reg, &dec_reg); | |
739 | } | |
740 | } | |
741 | ||
742 | const DEFAULT_CHANNEL_MAP: [&str; 9] = [ | |
743 | "", | |
744 | "C", | |
745 | "L,R", | |
746 | "C,L,R", | |
747 | "C,L,R,Cs", | |
748 | "C,L,R,Ls,Rs", | |
749 | "C,L,R,Ls,Rs,LFE", | |
750 | "", | |
751 | "C,L,R,Ls,Rs,Lss,Rss,LFE", | |
752 | ]; |