| 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 | mod sbr; |
| 15 | use sbr::{SBRHeader, SBRCodebooks, SBRState, SBRChannel, SBRDSP, sbr_read_sce, sbr_read_cpe}; |
| 16 | #[allow(clippy::excessive_precision)] |
| 17 | mod tables; |
| 18 | use tables::*; |
| 19 | mod tools; |
| 20 | use tools::*; |
| 21 | |
| 22 | const MAX_WINDOWS: usize = 8; |
| 23 | const MAX_SFBS: usize = 64; |
| 24 | |
| 25 | #[derive(Clone,Copy)] |
| 26 | pub struct ICSInfo { |
| 27 | window_sequence: u8, |
| 28 | prev_window_sequence: u8, |
| 29 | window_shape: bool, |
| 30 | prev_window_shape: bool, |
| 31 | scale_factor_grouping: [bool; MAX_WINDOWS], |
| 32 | group_start: [usize; MAX_WINDOWS], |
| 33 | window_groups: usize, |
| 34 | num_windows: usize, |
| 35 | max_sfb: usize, |
| 36 | predictor_data: Option<LTPData>, |
| 37 | long_win: bool, |
| 38 | } |
| 39 | |
| 40 | const ONLY_LONG_SEQUENCE: u8 = 0; |
| 41 | const LONG_START_SEQUENCE: u8 = 1; |
| 42 | const EIGHT_SHORT_SEQUENCE: u8 = 2; |
| 43 | const LONG_STOP_SEQUENCE: u8 = 3; |
| 44 | |
| 45 | impl ICSInfo { |
| 46 | fn new() -> Self { |
| 47 | Self { |
| 48 | window_sequence: 0, |
| 49 | prev_window_sequence: 0, |
| 50 | window_shape: false, |
| 51 | prev_window_shape: false, |
| 52 | scale_factor_grouping: [false; MAX_WINDOWS], |
| 53 | group_start: [0; MAX_WINDOWS], |
| 54 | num_windows: 0, |
| 55 | window_groups: 0, |
| 56 | max_sfb: 0, |
| 57 | predictor_data: None, |
| 58 | long_win: true, |
| 59 | } |
| 60 | } |
| 61 | fn decode_ics_info(&mut self, br: &mut BitReader) -> DecoderResult<()> { |
| 62 | self.prev_window_sequence = self.window_sequence; |
| 63 | self.prev_window_shape = self.window_shape; |
| 64 | let ics_reserved_bit = br.read(1)?; |
| 65 | validate!(ics_reserved_bit == 0); |
| 66 | self.window_sequence = br.read(2)? as u8; |
| 67 | /*match self.prev_window_sequence { |
| 68 | ONLY_LONG_SEQUENCE | LONG_STOP_SEQUENCE => { |
| 69 | if (self.window_sequence != ONLY_LONG_SEQUENCE) && |
| 70 | (self.window_sequence != LONG_START_SEQUENCE) { |
| 71 | println!("incorrect previous window"); |
| 72 | } |
| 73 | }, |
| 74 | LONG_START_SEQUENCE | EIGHT_SHORT_SEQUENCE => { |
| 75 | if (self.window_sequence != EIGHT_SHORT_SEQUENCE) && |
| 76 | (self.window_sequence != LONG_STOP_SEQUENCE) { |
| 77 | println!("incorrect previous window"); |
| 78 | } |
| 79 | }, |
| 80 | _ => {}, |
| 81 | };*/ |
| 82 | self.window_shape = br.read_bool()?; |
| 83 | self.window_groups = 1; |
| 84 | if self.window_sequence == EIGHT_SHORT_SEQUENCE { |
| 85 | self.long_win = false; |
| 86 | self.num_windows = 8; |
| 87 | self.max_sfb = br.read(4)? as usize; |
| 88 | for i in 0..MAX_WINDOWS-1 { |
| 89 | self.scale_factor_grouping[i] = br.read_bool()?; |
| 90 | if !self.scale_factor_grouping[i] { |
| 91 | self.group_start[self.window_groups] = i + 1; |
| 92 | self.window_groups += 1; |
| 93 | } |
| 94 | } |
| 95 | } else { |
| 96 | self.long_win = true; |
| 97 | self.num_windows = 1; |
| 98 | self.max_sfb = br.read(6)? as usize; |
| 99 | self.predictor_data = LTPData::read(br)?; |
| 100 | } |
| 101 | Ok(()) |
| 102 | } |
| 103 | fn get_group_start(&self, g: usize) -> usize { |
| 104 | if g == 0 { |
| 105 | 0 |
| 106 | } else if g >= self.window_groups { |
| 107 | if self.long_win { 1 } else { 8 } |
| 108 | } else { |
| 109 | self.group_start[g] |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | #[derive(Clone)] |
| 115 | struct ICS { |
| 116 | global_gain: u8, |
| 117 | info: ICSInfo, |
| 118 | pulse_data: Option<PulseData>, |
| 119 | tns_data: Option<TNSData>, |
| 120 | gain_control: Option<GainControlData>, |
| 121 | sect_cb: [[u8; MAX_SFBS]; MAX_WINDOWS], |
| 122 | sect_len: [[usize; MAX_SFBS]; MAX_WINDOWS], |
| 123 | sfb_cb: [[u8; MAX_SFBS]; MAX_WINDOWS], |
| 124 | num_sec: [usize; MAX_WINDOWS], |
| 125 | scales: [[u8; MAX_SFBS]; MAX_WINDOWS], |
| 126 | sbinfo: GASubbandInfo, |
| 127 | coeffs: [f32; 1024], |
| 128 | delay: [f32; 1024], |
| 129 | } |
| 130 | |
| 131 | const INTENSITY_SCALE_MIN: i16 = -155; |
| 132 | impl ICS { |
| 133 | fn new(sbinfo: GASubbandInfo) -> Self { |
| 134 | Self { |
| 135 | global_gain: 0, |
| 136 | info: ICSInfo::new(), |
| 137 | pulse_data: None, |
| 138 | tns_data: None, |
| 139 | gain_control: None, |
| 140 | sect_cb: [[0; MAX_SFBS]; MAX_WINDOWS], |
| 141 | sect_len: [[0; MAX_SFBS]; MAX_WINDOWS], |
| 142 | sfb_cb: [[0; MAX_SFBS]; MAX_WINDOWS], |
| 143 | scales: [[0; MAX_SFBS]; MAX_WINDOWS], |
| 144 | num_sec: [0; MAX_WINDOWS], |
| 145 | sbinfo, |
| 146 | coeffs: [0.0; 1024], |
| 147 | delay: [0.0; 1024], |
| 148 | } |
| 149 | } |
| 150 | fn decode_section_data(&mut self, br: &mut BitReader, may_have_intensity: bool) -> DecoderResult<()> { |
| 151 | let sect_bits = if self.info.long_win { 5 } else { 3 }; |
| 152 | let sect_esc_val = (1 << sect_bits) - 1; |
| 153 | |
| 154 | for g in 0..self.info.window_groups { |
| 155 | let mut k = 0; |
| 156 | let mut l = 0; |
| 157 | while k < self.info.max_sfb { |
| 158 | self.sect_cb[g][l] = br.read(4)? as u8; |
| 159 | self.sect_len[g][l] = 0; |
| 160 | validate!(self.sect_cb[g][l] != RESERVED_HCB); |
| 161 | if ((self.sect_cb[g][l] == INTENSITY_HCB) || (self.sect_cb[g][l] == INTENSITY_HCB2)) && !may_have_intensity { |
| 162 | return Err(DecoderError::InvalidData); |
| 163 | } |
| 164 | loop { |
| 165 | let sect_len_incr = br.read(sect_bits)? as usize; |
| 166 | self.sect_len[g][l] += sect_len_incr; |
| 167 | if sect_len_incr < sect_esc_val { break; } |
| 168 | } |
| 169 | validate!(k + self.sect_len[g][l] <= self.info.max_sfb); |
| 170 | for _ in 0..self.sect_len[g][l] { |
| 171 | self.sfb_cb[g][k] = self.sect_cb[g][l]; |
| 172 | k += 1; |
| 173 | } |
| 174 | l += 1; |
| 175 | } |
| 176 | self.num_sec[g] = l; |
| 177 | } |
| 178 | Ok(()) |
| 179 | } |
| 180 | fn is_intensity(&self, g: usize, sfb: usize) -> bool { |
| 181 | (self.sfb_cb[g][sfb] == INTENSITY_HCB) || (self.sfb_cb[g][sfb] == INTENSITY_HCB2) |
| 182 | } |
| 183 | fn get_intensity_dir(&self, g: usize, sfb: usize) -> bool { |
| 184 | self.sfb_cb[g][sfb] == INTENSITY_HCB |
| 185 | } |
| 186 | fn decode_scale_factor_data(&mut self, br: &mut BitReader, codebooks: &Codebooks) -> DecoderResult<()> { |
| 187 | decode_scale_factor_data(br, &mut self.scales, self.global_gain, &self.info, &self.sfb_cb, codebooks) |
| 188 | } |
| 189 | fn get_band_start(&self, swb: usize) -> usize { |
| 190 | if self.info.long_win { |
| 191 | self.sbinfo.long_bands[swb] |
| 192 | } else { |
| 193 | self.sbinfo.short_bands[swb] |
| 194 | } |
| 195 | } |
| 196 | fn get_num_bands(&self) -> usize { |
| 197 | if self.info.long_win { |
| 198 | self.sbinfo.long_bands.len() - 1 |
| 199 | } else { |
| 200 | self.sbinfo.short_bands.len() - 1 |
| 201 | } |
| 202 | } |
| 203 | fn decode_spectrum(&mut self, br: &mut BitReader, codebooks: &Codebooks) -> DecoderResult<()> { |
| 204 | self.coeffs = [0.0; 1024]; |
| 205 | decode_spectrum(br, &mut self.coeffs, &self.scales, &self.info, &self.sbinfo, &self.sfb_cb, codebooks) |
| 206 | } |
| 207 | fn iquant(val: f32) -> f32 { |
| 208 | if val < 0.0 { |
| 209 | -((-val).powf(4.0 / 3.0)) |
| 210 | } else { |
| 211 | val.powf(4.0 / 3.0) |
| 212 | } |
| 213 | } |
| 214 | fn place_pulses(&mut self) { |
| 215 | if let Some(ref pdata) = self.pulse_data { |
| 216 | if pdata.pulse_start_sfb >= self.sbinfo.long_bands.len() - 1 { return; } |
| 217 | let mut k = self.get_band_start(pdata.pulse_start_sfb); |
| 218 | let mut band = pdata.pulse_start_sfb; |
| 219 | for pno in 0..pdata.number_pulse { |
| 220 | k += pdata.pulse_offset[pno] as usize; |
| 221 | if k >= 1024 { return; } |
| 222 | while self.get_band_start(band + 1) <= k { band += 1; } |
| 223 | let scale = get_scale(self.scales[0][band]); |
| 224 | let mut base = self.coeffs[k]; |
| 225 | if base != 0.0 { |
| 226 | base = requant(self.coeffs[k], scale); |
| 227 | } |
| 228 | if base > 0.0 { |
| 229 | base += f32::from(pdata.pulse_amp[pno]); |
| 230 | } else { |
| 231 | base -= f32::from(pdata.pulse_amp[pno]); |
| 232 | } |
| 233 | self.coeffs[k] = Self::iquant(base) * scale; |
| 234 | } |
| 235 | } |
| 236 | } |
| 237 | fn decode_ics(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType, common_window: bool, may_have_intensity: bool) -> DecoderResult<()> { |
| 238 | self.global_gain = br.read(8)? as u8; |
| 239 | if !common_window { |
| 240 | self.info.decode_ics_info(br)?; |
| 241 | } |
| 242 | self.decode_section_data(br, may_have_intensity)?; |
| 243 | self.decode_scale_factor_data(br, codebooks)?; |
| 244 | self.pulse_data = PulseData::read(br)?; |
| 245 | validate!(self.pulse_data.is_none() || self.info.long_win); |
| 246 | let tns_max_order; |
| 247 | if !self.info.long_win { |
| 248 | tns_max_order = 7; |
| 249 | } else if m4atype == M4AType::LC { |
| 250 | tns_max_order = 12; |
| 251 | } else { |
| 252 | tns_max_order = TNS_MAX_ORDER; |
| 253 | } |
| 254 | self.tns_data = TNSData::read(br, self.info.long_win, self.info.num_windows, tns_max_order)?; |
| 255 | if m4atype == M4AType::SSR { |
| 256 | self.gain_control = GainControlData::read(br)?; |
| 257 | } else { |
| 258 | let gain_control_data_present = br.read_bool()?; |
| 259 | validate!(!gain_control_data_present); |
| 260 | } |
| 261 | self.decode_spectrum(br, codebooks)?; |
| 262 | Ok(()) |
| 263 | } |
| 264 | fn synth_channel(&mut self, dsp: &mut DSP, dst: &mut [f32], srate_idx: usize) { |
| 265 | self.place_pulses(); |
| 266 | if let Some(ref tns_data) = self.tns_data { |
| 267 | let tns_max_bands = TNSData::get_max_bands(self.info.long_win, srate_idx).min(self.info.max_sfb); |
| 268 | for w in 0..self.info.num_windows { |
| 269 | let mut bottom = self.get_num_bands(); |
| 270 | for f in 0..tns_data.n_filt[w] { |
| 271 | let top = bottom; |
| 272 | bottom = if top >= tns_data.coeffs[w][f].length { top - tns_data.coeffs[w][f].length } else { 0 }; |
| 273 | let order = tns_data.coeffs[w][f].order; |
| 274 | if order == 0 { continue; } |
| 275 | let start = w * 128 + self.get_band_start(tns_max_bands.min(bottom)); |
| 276 | let end = w * 128 + self.get_band_start(tns_max_bands.min(top)); |
| 277 | tns_data.apply(&mut self.coeffs, w, f, start, end); |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | dsp.synth(&self.coeffs, &mut self.delay, self.info.window_sequence, self.info.window_shape, self.info.prev_window_shape, dst); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | #[derive(Clone)] |
| 286 | struct ChannelPair { |
| 287 | pair: bool, |
| 288 | channel: usize, |
| 289 | common_window: bool, |
| 290 | ms_mask_present: u8, |
| 291 | ms_used: [[bool; MAX_SFBS]; MAX_WINDOWS], |
| 292 | ics: [ICS; 2], |
| 293 | sbr_hdr: SBRHeader, |
| 294 | sbr_state: SBRState, |
| 295 | sbr_ch: [SBRChannel; 2], |
| 296 | do_sbr: bool, |
| 297 | } |
| 298 | |
| 299 | impl ChannelPair { |
| 300 | fn new(pair: bool, channel: usize, sbinfo: GASubbandInfo) -> Self { |
| 301 | Self { |
| 302 | pair, channel, |
| 303 | common_window: false, |
| 304 | ms_mask_present: 0, |
| 305 | ms_used: [[false; MAX_SFBS]; MAX_WINDOWS], |
| 306 | ics: [ICS::new(sbinfo), ICS::new(sbinfo)], |
| 307 | sbr_hdr: SBRHeader::new(), |
| 308 | sbr_state: SBRState::new(), |
| 309 | sbr_ch: [SBRChannel::new(), SBRChannel::new()], |
| 310 | do_sbr: false, |
| 311 | } |
| 312 | } |
| 313 | fn decode_ga_sce(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType) -> DecoderResult<()> { |
| 314 | self.ics[0].decode_ics(br, codebooks, m4atype, false, false)?; |
| 315 | Ok(()) |
| 316 | } |
| 317 | fn decode_ga_cpe(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType) -> DecoderResult<()> { |
| 318 | let common_window = br.read_bool()?; |
| 319 | self.common_window = common_window; |
| 320 | if common_window { |
| 321 | self.ics[0].info.decode_ics_info(br)?; |
| 322 | self.ms_mask_present = br.read(2)? as u8; |
| 323 | validate!(self.ms_mask_present != 3); |
| 324 | if self.ms_mask_present == 1 { |
| 325 | for g in 0..self.ics[0].info.window_groups { |
| 326 | for sfb in 0..self.ics[0].info.max_sfb { |
| 327 | self.ms_used[g][sfb] = br.read_bool()?; |
| 328 | } |
| 329 | } |
| 330 | } |
| 331 | self.ics[1].info = self.ics[0].info; |
| 332 | } |
| 333 | self.ics[0].decode_ics(br, codebooks, m4atype, common_window, true)?; |
| 334 | self.ics[1].decode_ics(br, codebooks, m4atype, common_window, true)?; |
| 335 | if common_window && self.ms_mask_present != 0 { |
| 336 | let mut g = 0; |
| 337 | for w in 0..self.ics[0].info.num_windows { |
| 338 | if w > 0 && !self.ics[0].info.scale_factor_grouping[w - 1] { |
| 339 | g += 1; |
| 340 | } |
| 341 | for sfb in 0..self.ics[0].info.max_sfb { |
| 342 | let start = w * 128 + self.ics[0].get_band_start(sfb); |
| 343 | let end = w * 128 + self.ics[0].get_band_start(sfb + 1); |
| 344 | if self.ics[0].is_intensity(g, sfb) { |
| 345 | let invert = (self.ms_mask_present == 1) && self.ms_used[g][sfb]; |
| 346 | let dir = self.ics[0].get_intensity_dir(g, sfb) ^ invert; |
| 347 | let scale = 0.5f32.powf(0.25 * (f32::from(self.ics[0].scales[g][sfb]) + f32::from(INTENSITY_SCALE_MIN))); |
| 348 | if !dir { |
| 349 | for i in start..end { |
| 350 | self.ics[1].coeffs[i] = scale * self.ics[0].coeffs[i]; |
| 351 | } |
| 352 | } else { |
| 353 | for i in start..end { |
| 354 | self.ics[1].coeffs[i] = -scale * self.ics[0].coeffs[i]; |
| 355 | } |
| 356 | } |
| 357 | } else if (self.ms_mask_present == 2) || self.ms_used[g][sfb] { |
| 358 | for i in start..end { |
| 359 | let tmp = self.ics[0].coeffs[i] - self.ics[1].coeffs[i]; |
| 360 | self.ics[0].coeffs[i] += self.ics[1].coeffs[i]; |
| 361 | self.ics[1].coeffs[i] = tmp; |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | Ok(()) |
| 368 | } |
| 369 | fn decode_sbr(&mut self, buf: &[u8], has_crc: bool, cbs: &SBRCodebooks, srate: u32) -> DecoderResult<()> { |
| 370 | let mut br = BitReader::new(buf, BitReaderMode::BE); |
| 371 | if has_crc { |
| 372 | let _bs_sbr_crc_bits = br.read(10)?; |
| 373 | } |
| 374 | if br.read_bool()? { |
| 375 | if let Ok(hdr) = SBRHeader::read(&mut br) { |
| 376 | if self.sbr_hdr.differs_from(&hdr) { |
| 377 | self.do_sbr = self.sbr_state.init(&hdr, srate).is_ok(); |
| 378 | self.sbr_ch[0].reset(); |
| 379 | self.sbr_ch[1].reset(); |
| 380 | } |
| 381 | self.sbr_hdr = hdr; |
| 382 | } else { |
| 383 | self.do_sbr = false; |
| 384 | } |
| 385 | } |
| 386 | if self.do_sbr { |
| 387 | if !self.pair { |
| 388 | sbr_read_sce(&mut br, self.sbr_hdr.amp_res, &self.sbr_state, cbs, &mut self.sbr_ch[0])?; |
| 389 | } else { |
| 390 | sbr_read_cpe(&mut br, self.sbr_hdr.amp_res, &self.sbr_state, cbs, &mut self.sbr_ch)?; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | Ok(()) |
| 395 | } |
| 396 | fn synth_audio(&mut self, dsp: &mut DSP, abuf: &mut NABufferType, srate_idx: usize, upsample: bool) { |
| 397 | let mut adata = abuf.get_abuf_f32().unwrap(); |
| 398 | let output = adata.get_data_mut().unwrap(); |
| 399 | let off0 = abuf.get_offset(self.channel); |
| 400 | let off1 = abuf.get_offset(self.channel + 1); |
| 401 | if !upsample { |
| 402 | self.ics[0].synth_channel(dsp, &mut output[off0..], srate_idx); |
| 403 | if self.pair { |
| 404 | self.ics[1].synth_channel(dsp, &mut output[off1..], srate_idx); |
| 405 | } |
| 406 | } else { |
| 407 | let mut tmp = [0.0; 1024]; |
| 408 | let nchannels = if self.pair { 2 } else { 1 }; |
| 409 | for ch in 0..nchannels { |
| 410 | let off = if ch == 0 { off0 } else { off1 }; |
| 411 | self.ics[ch].synth_channel(dsp, &mut tmp, srate_idx); |
| 412 | self.sbr_ch[ch].analysis(&mut dsp.sbr_dsp, &tmp); |
| 413 | if self.do_sbr { |
| 414 | self.sbr_ch[ch].hf_generate(&self.sbr_state); |
| 415 | self.sbr_ch[ch].hf_adjust(&self.sbr_state, &self.sbr_hdr); |
| 416 | } else { |
| 417 | self.sbr_ch[ch].bypass(); |
| 418 | } |
| 419 | self.sbr_ch[ch].synthesis(&mut dsp.sbr_dsp, &mut output[off..][..2048]); |
| 420 | self.sbr_ch[ch].update_frame(); |
| 421 | } |
| 422 | } |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | struct DSP { |
| 427 | kbd_long_win: [f32; 1024], |
| 428 | kbd_short_win: [f32; 128], |
| 429 | sine_long_win: [f32; 1024], |
| 430 | sine_short_win: [f32; 128], |
| 431 | imdct_long: IMDCT, |
| 432 | imdct_short: IMDCT, |
| 433 | tmp: [f32; 2048], |
| 434 | ew_buf: [f32; 1152], |
| 435 | sbr_dsp: SBRDSP, |
| 436 | } |
| 437 | |
| 438 | const SHORT_WIN_POINT0: usize = 512 - 64; |
| 439 | const SHORT_WIN_POINT1: usize = 512 + 64; |
| 440 | |
| 441 | impl DSP { |
| 442 | fn new() -> Self { |
| 443 | let mut kbd_long_win: [f32; 1024] = [0.0; 1024]; |
| 444 | let mut kbd_short_win: [f32; 128] = [0.0; 128]; |
| 445 | generate_window(WindowType::KaiserBessel(4.0), 1.0, 1024, true, &mut kbd_long_win); |
| 446 | generate_window(WindowType::KaiserBessel(6.0), 1.0, 128, true, &mut kbd_short_win); |
| 447 | let mut sine_long_win: [f32; 1024] = [0.0; 1024]; |
| 448 | let mut sine_short_win: [f32; 128] = [0.0; 128]; |
| 449 | generate_window(WindowType::Sine, 1.0, 1024, true, &mut sine_long_win); |
| 450 | generate_window(WindowType::Sine, 1.0, 128, true, &mut sine_short_win); |
| 451 | Self { |
| 452 | kbd_long_win, kbd_short_win, |
| 453 | sine_long_win, sine_short_win, |
| 454 | imdct_long: IMDCT::new(1024 * 2, true), |
| 455 | imdct_short: IMDCT::new(128 * 2, true), |
| 456 | tmp: [0.0; 2048], ew_buf: [0.0; 1152], |
| 457 | sbr_dsp: SBRDSP::new(), |
| 458 | } |
| 459 | } |
| 460 | #[allow(clippy::cognitive_complexity)] |
| 461 | fn synth(&mut self, coeffs: &[f32; 1024], delay: &mut [f32; 1024], seq: u8, window_shape: bool, prev_window_shape: bool, dst: &mut [f32]) { |
| 462 | let long_win = if window_shape { &self.kbd_long_win } else { &self.sine_long_win }; |
| 463 | let short_win = if window_shape { &self.kbd_short_win } else { &self.sine_short_win }; |
| 464 | let left_long_win = if prev_window_shape { &self.kbd_long_win } else { &self.sine_long_win }; |
| 465 | let left_short_win = if prev_window_shape { &self.kbd_short_win } else { &self.sine_short_win }; |
| 466 | if seq != EIGHT_SHORT_SEQUENCE { |
| 467 | self.imdct_long.imdct(coeffs, &mut self.tmp); |
| 468 | } else { |
| 469 | for (ain, aout) in coeffs.chunks(128).zip(self.tmp.chunks_mut(256)) { |
| 470 | self.imdct_short.imdct(ain, aout); |
| 471 | } |
| 472 | self.ew_buf = [0.0; 1152]; |
| 473 | for (w, src) in self.tmp.chunks(256).enumerate() { |
| 474 | if w > 0 { |
| 475 | for i in 0..128 { |
| 476 | self.ew_buf[w * 128 + i] += src[i] * short_win[i]; |
| 477 | } |
| 478 | } else { // to be left-windowed |
| 479 | for i in 0..128 { |
| 480 | self.ew_buf[i] = src[i]; |
| 481 | } |
| 482 | } |
| 483 | for i in 0..128 { |
| 484 | self.ew_buf[w * 128 + i + 128] += src[i + 128] * short_win[127 - i]; |
| 485 | } |
| 486 | } |
| 487 | } |
| 488 | if seq == ONLY_LONG_SEQUENCE { // should be the most common case |
| 489 | for i in 0..1024 { |
| 490 | dst[i] = delay[i] + self.tmp[i] * left_long_win[i]; |
| 491 | delay[i] = self.tmp[i + 1024] * long_win[1023 - i]; |
| 492 | } |
| 493 | return; |
| 494 | } |
| 495 | // output new data |
| 496 | match seq { |
| 497 | ONLY_LONG_SEQUENCE | LONG_START_SEQUENCE => { |
| 498 | for i in 0..1024 { |
| 499 | dst[i] = self.tmp[i] * left_long_win[i] + delay[i]; |
| 500 | } |
| 501 | }, |
| 502 | EIGHT_SHORT_SEQUENCE => { |
| 503 | for i in 0..SHORT_WIN_POINT0 { |
| 504 | dst[i] = delay[i]; |
| 505 | } |
| 506 | for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 { |
| 507 | let j = i - SHORT_WIN_POINT0; |
| 508 | dst[i] = delay[i] + self.ew_buf[j] * left_short_win[j]; |
| 509 | } |
| 510 | for i in SHORT_WIN_POINT1..1024 { |
| 511 | let j = i - SHORT_WIN_POINT0; |
| 512 | dst[i] = self.ew_buf[j]; |
| 513 | } |
| 514 | }, |
| 515 | LONG_STOP_SEQUENCE => { |
| 516 | for i in 0..SHORT_WIN_POINT0 { |
| 517 | dst[i] = delay[i]; |
| 518 | } |
| 519 | for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 { |
| 520 | dst[i] = delay[i] + self.tmp[i] * left_short_win[i - SHORT_WIN_POINT0]; |
| 521 | } |
| 522 | for i in SHORT_WIN_POINT1..1024 { |
| 523 | dst[i] = self.tmp[i]; |
| 524 | } |
| 525 | }, |
| 526 | _ => unreachable!(""), |
| 527 | }; |
| 528 | // save delay |
| 529 | match seq { |
| 530 | ONLY_LONG_SEQUENCE | LONG_STOP_SEQUENCE => { |
| 531 | for i in 0..1024 { |
| 532 | delay[i] = self.tmp[i + 1024] * long_win[1023 - i]; |
| 533 | } |
| 534 | }, |
| 535 | EIGHT_SHORT_SEQUENCE => { |
| 536 | for i in 0..SHORT_WIN_POINT1 { // last part is already windowed |
| 537 | delay[i] = self.ew_buf[i + 512+64]; |
| 538 | } |
| 539 | for i in SHORT_WIN_POINT1..1024 { |
| 540 | delay[i] = 0.0; |
| 541 | } |
| 542 | }, |
| 543 | LONG_START_SEQUENCE => { |
| 544 | for i in 0..SHORT_WIN_POINT0 { |
| 545 | delay[i] = self.tmp[i + 1024]; |
| 546 | } |
| 547 | for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 { |
| 548 | delay[i] = self.tmp[i + 1024] * short_win[127 - (i - SHORT_WIN_POINT0)]; |
| 549 | } |
| 550 | for i in SHORT_WIN_POINT1..1024 { |
| 551 | delay[i] = 0.0; |
| 552 | } |
| 553 | }, |
| 554 | _ => unreachable!(""), |
| 555 | }; |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | struct AACDecoder { |
| 560 | info: NACodecInfoRef, |
| 561 | chmap: NAChannelMap, |
| 562 | m4ainfo: M4AInfo, |
| 563 | pairs: Vec<ChannelPair>, |
| 564 | codebooks: Codebooks, |
| 565 | dsp: DSP, |
| 566 | sbinfo: GASubbandInfo, |
| 567 | sbr_cbs: SBRCodebooks, |
| 568 | upsample: bool, |
| 569 | } |
| 570 | |
| 571 | impl AACDecoder { |
| 572 | fn new() -> Self { |
| 573 | AACDecoder { |
| 574 | info: NACodecInfo::new_dummy(), |
| 575 | chmap: NAChannelMap::new(), |
| 576 | m4ainfo: M4AInfo::new(), |
| 577 | pairs: Vec::new(), |
| 578 | codebooks: Codebooks::new(), |
| 579 | dsp: DSP::new(), |
| 580 | sbinfo: AAC_SUBBAND_INFO[0], |
| 581 | sbr_cbs: SBRCodebooks::new(), |
| 582 | upsample: false, |
| 583 | } |
| 584 | } |
| 585 | fn set_pair(&mut self, pair_no: usize, channel: usize, pair: bool) -> DecoderResult<()> { |
| 586 | if self.pairs.len() <= pair_no { |
| 587 | self.pairs.push(ChannelPair::new(pair, channel, self.sbinfo)); |
| 588 | } else { |
| 589 | validate!(self.pairs[pair_no].channel == channel); |
| 590 | validate!(self.pairs[pair_no].pair == pair); |
| 591 | } |
| 592 | validate!(if pair { channel + 1 } else { channel } < self.m4ainfo.channels); |
| 593 | Ok(()) |
| 594 | } |
| 595 | fn decode_ga(&mut self, br: &mut BitReader, abuf: &mut NABufferType) -> DecoderResult<()> { |
| 596 | let mut cur_pair = 0; |
| 597 | let mut cur_ch = 0; |
| 598 | while br.left() > 3 { |
| 599 | let id = br.read(3)?; |
| 600 | match id { |
| 601 | 0 => { // ID_SCE |
| 602 | let _tag = br.read(4)?; |
| 603 | self.set_pair(cur_pair, cur_ch, false)?; |
| 604 | self.pairs[cur_pair].decode_ga_sce(br, &self.codebooks, self.m4ainfo.otype)?; |
| 605 | cur_pair += 1; |
| 606 | cur_ch += 1; |
| 607 | }, |
| 608 | 1 => { // ID_CPE |
| 609 | let _tag = br.read(4)?; |
| 610 | self.set_pair(cur_pair, cur_ch, true)?; |
| 611 | self.pairs[cur_pair].decode_ga_cpe(br, &self.codebooks, self.m4ainfo.otype)?; |
| 612 | cur_pair += 1; |
| 613 | cur_ch += 2; |
| 614 | }, |
| 615 | 2 => { // ID_CCE |
| 616 | unimplemented!("coupling channel element"); |
| 617 | }, |
| 618 | 3 => { // ID_LFE |
| 619 | let _tag = br.read(4)?; |
| 620 | self.set_pair(cur_pair, cur_ch, false)?; |
| 621 | self.pairs[cur_pair].decode_ga_sce(br, &self.codebooks, self.m4ainfo.otype)?; |
| 622 | cur_pair += 1; |
| 623 | cur_ch += 1; |
| 624 | }, |
| 625 | 4 => { // ID_DSE |
| 626 | let _id = br.read(4)?; |
| 627 | let align = br.read_bool()?; |
| 628 | let mut count = br.read(8)? as u32; |
| 629 | if count == 255 { count += br.read(8)? as u32; } |
| 630 | if align { br.align(); } |
| 631 | br.skip(count * 8)?; // no SBR payload or such |
| 632 | }, |
| 633 | 5 => { // ID_PCE |
| 634 | skimp_through_program_config_element(br)?; |
| 635 | }, |
| 636 | 6 => { // ID_FIL |
| 637 | let mut count = br.read(4)? as usize; |
| 638 | if count == 15 { |
| 639 | count += br.read(8)? as usize; |
| 640 | count -= 1; |
| 641 | } |
| 642 | if count > 0 { |
| 643 | let extension_type = br.read(4)?; |
| 644 | match extension_type { |
| 645 | 0xD | 0xE => { // SBR data without or with CRC |
| 646 | let has_crc = extension_type == 0xE; |
| 647 | |
| 648 | let mut buf = [0; 256 + 16]; |
| 649 | for el in buf[..count - 1].iter_mut() { |
| 650 | *el = br.read(8)? as u8; |
| 651 | } |
| 652 | buf[count - 1] = br.read(4)? as u8; |
| 653 | if cur_pair > 0 { |
| 654 | self.pairs[cur_pair - 1].decode_sbr(&buf[..count], has_crc, &self.sbr_cbs, self.m4ainfo.srate * 2)?; |
| 655 | } |
| 656 | }, |
| 657 | _ => { |
| 658 | for _ in 0..count-1 { |
| 659 | br.skip(8)?; |
| 660 | } |
| 661 | br.skip(4)?; |
| 662 | }, |
| 663 | }; |
| 664 | } |
| 665 | }, |
| 666 | 7 => { // ID_TERM |
| 667 | break; |
| 668 | }, |
| 669 | _ => { unreachable!(); }, |
| 670 | }; |
| 671 | } |
| 672 | let srate_idx = GASubbandInfo::find_idx(self.m4ainfo.srate); |
| 673 | for pair in 0..cur_pair { |
| 674 | self.pairs[pair].synth_audio(&mut self.dsp, abuf, srate_idx, self.upsample); |
| 675 | } |
| 676 | Ok(()) |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | impl NADecoder for AACDecoder { |
| 681 | fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { |
| 682 | if let NACodecTypeInfo::Audio(_) = info.get_properties() { |
| 683 | let edata = info.get_extradata().unwrap(); |
| 684 | validate!(edata.len() >= 2); |
| 685 | |
| 686 | if (edata.len() > 12) && (&edata[4..8] == b"esds") { |
| 687 | let mut mr = MemoryReader::new_read(edata.as_slice()); |
| 688 | let mut br = ByteReader::new(&mut mr); |
| 689 | let esds_size = br.read_u32be()? as usize; |
| 690 | validate!(esds_size <= edata.len()); |
| 691 | br.read_skip(8)?; |
| 692 | let mut info_start = 0; |
| 693 | let mut info_size = 0; |
| 694 | while br.tell() < (esds_size as u64) { |
| 695 | let tag = br.read_byte()?; |
| 696 | let mut size = 0; |
| 697 | loop { |
| 698 | let b = br.read_byte()?; |
| 699 | size = (size << 7) | u64::from(b & 0x7F); |
| 700 | validate!(br.tell() + size <= (esds_size as u64)); |
| 701 | if (b & 0x80) == 0 { |
| 702 | break; |
| 703 | } |
| 704 | } |
| 705 | match tag { |
| 706 | 3 => { |
| 707 | br.read_u16be()?; |
| 708 | let flags = br.read_byte()?; |
| 709 | if (flags & 0x80) != 0 { |
| 710 | br.read_u16be()?; |
| 711 | } |
| 712 | if (flags & 0x40) != 0 { |
| 713 | let len = br.read_byte()?; |
| 714 | br.read_skip(len as usize)?; |
| 715 | } |
| 716 | if (flags & 0x20) != 0 { |
| 717 | br.read_u16be()?; |
| 718 | } |
| 719 | }, |
| 720 | 4 => { |
| 721 | let _otype = br.read_byte()?; |
| 722 | let _stype = br.read_byte()?; |
| 723 | let _flags = br.read_u24be()?; |
| 724 | let _max_br = br.read_u32be()?; |
| 725 | let _min_br = br.read_u32be()?; |
| 726 | }, |
| 727 | 5 => { |
| 728 | info_start = br.tell() as usize; |
| 729 | info_size = size as usize; |
| 730 | break; |
| 731 | }, |
| 732 | _ => br.read_skip(size as usize)?, |
| 733 | } |
| 734 | } |
| 735 | validate!(info_start > 0 && info_size > 0); |
| 736 | self.m4ainfo.read(&edata[info_start..][..info_size])?; |
| 737 | } else { |
| 738 | self.m4ainfo.read(&edata)?; |
| 739 | } |
| 740 | |
| 741 | //println!("{}", self.m4ainfo); |
| 742 | if (self.m4ainfo.otype != M4AType::LC) || (self.m4ainfo.channels > 2) || (self.m4ainfo.samples != 1024) { |
| 743 | return Err(DecoderError::NotImplemented); |
| 744 | } |
| 745 | self.sbinfo = GASubbandInfo::find(self.m4ainfo.srate); |
| 746 | |
| 747 | self.upsample = self.m4ainfo.srate < 32000; |
| 748 | let (srate, samples) = if !self.upsample { |
| 749 | (self.m4ainfo.srate, self.m4ainfo.samples) |
| 750 | } else { |
| 751 | (self.m4ainfo.srate * 2, self.m4ainfo.samples * 2) |
| 752 | }; |
| 753 | |
| 754 | let ainfo = NAAudioInfo::new(srate, self.m4ainfo.channels as u8, |
| 755 | SND_F32P_FORMAT, samples); |
| 756 | self.info = info.replace_info(NACodecTypeInfo::Audio(ainfo)); |
| 757 | |
| 758 | if self.m4ainfo.channels >= DEFAULT_CHANNEL_MAP.len() { |
| 759 | return Err(DecoderError::NotImplemented); |
| 760 | } |
| 761 | let chmap_str = DEFAULT_CHANNEL_MAP[self.m4ainfo.channels]; |
| 762 | if chmap_str.is_empty() { return Err(DecoderError::NotImplemented); } |
| 763 | self.chmap = NAChannelMap::from_str(chmap_str).unwrap(); |
| 764 | |
| 765 | Ok(()) |
| 766 | } else { |
| 767 | Err(DecoderError::InvalidData) |
| 768 | } |
| 769 | } |
| 770 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { |
| 771 | let info = pkt.get_stream().get_info(); |
| 772 | validate!(info.get_properties().is_audio()); |
| 773 | let pktbuf = pkt.get_buffer(); |
| 774 | |
| 775 | let ainfo = self.info.get_properties().get_audio_info().unwrap(); |
| 776 | let samples = if !self.upsample { self.m4ainfo.samples } else { self.m4ainfo.samples * 2 }; |
| 777 | let mut abuf = alloc_audio_buffer(ainfo, samples, self.chmap.clone())?; |
| 778 | |
| 779 | let mut br = BitReader::new(&pktbuf, BitReaderMode::BE); |
| 780 | match self.m4ainfo.otype { |
| 781 | M4AType::LC => { |
| 782 | self.decode_ga(&mut br, &mut abuf)?; |
| 783 | }, |
| 784 | _ => { unimplemented!(""); } |
| 785 | } |
| 786 | |
| 787 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.replace_info(NACodecTypeInfo::Audio(ainfo)), abuf); |
| 788 | frm.set_keyframe(true); |
| 789 | Ok(frm.into_ref()) |
| 790 | } |
| 791 | fn flush(&mut self) { |
| 792 | for pair in self.pairs.iter_mut() { |
| 793 | pair.ics[0].delay = [0.0; 1024]; |
| 794 | pair.ics[1].delay = [0.0; 1024]; |
| 795 | } |
| 796 | } |
| 797 | } |
| 798 | |
| 799 | impl NAOptionHandler for AACDecoder { |
| 800 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 801 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 802 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 803 | } |
| 804 | |
| 805 | pub fn get_decoder() -> Box<dyn NADecoder + Send> { |
| 806 | Box::new(AACDecoder::new()) |
| 807 | } |
| 808 | |
| 809 | #[cfg(test)] |
| 810 | mod test { |
| 811 | use nihav_core::codecs::RegisteredDecoders; |
| 812 | use nihav_core::demuxers::RegisteredDemuxers; |
| 813 | use nihav_codec_support::test::dec_video::test_decode_audio; |
| 814 | use crate::mpeg_register_all_decoders; |
| 815 | use nihav_realmedia::realmedia_register_all_demuxers; |
| 816 | #[test] |
| 817 | fn test_aac() { |
| 818 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 819 | realmedia_register_all_demuxers(&mut dmx_reg); |
| 820 | let mut dec_reg = RegisteredDecoders::new(); |
| 821 | mpeg_register_all_decoders(&mut dec_reg); |
| 822 | |
| 823 | // let file = "assets/RV/rv40_weighted_mc.rmvb"; |
| 824 | let file = "assets/RV/rv40_weighted_mc_2.rmvb"; |
| 825 | test_decode_audio("realmedia", file, Some(12000), None/*Some("aac")*/, &dmx_reg, &dec_reg); |
| 826 | } |
| 827 | #[test] |
| 828 | fn test_aac_sbr() { |
| 829 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 830 | nihav_commonfmt::generic_register_all_demuxers(&mut dmx_reg); |
| 831 | let mut dec_reg = RegisteredDecoders::new(); |
| 832 | mpeg_register_all_decoders(&mut dec_reg); |
| 833 | |
| 834 | let file = "assets/MPEG/SBRtestStereoAot29Sig0.mp4"; |
| 835 | test_decode_audio("mov", file, Some(400), None/*Some("aacsbr")*/, &dmx_reg, &dec_reg); |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | const DEFAULT_CHANNEL_MAP: [&str; 9] = [ |
| 840 | "", |
| 841 | "C", |
| 842 | "L,R", |
| 843 | "C,L,R", |
| 844 | "C,L,R,Cs", |
| 845 | "C,L,R,Ls,Rs", |
| 846 | "C,L,R,Ls,Rs,LFE", |
| 847 | "", |
| 848 | "C,L,R,Ls,Rs,Lss,Rss,LFE", |
| 849 | ]; |