+++ /dev/null
-use nihav_core::formats::*;
-use nihav_core::frame::*;
-use nihav_core::codecs::*;
-use nihav_codec_support::dsp::mdct::IMDCT;
-use nihav_codec_support::dsp::window::*;
-use nihav_core::io::bitreader::*;
-use nihav_core::io::byteio::*;
-use nihav_core::io::codebook::*;
-use std::fmt;
-use nihav_core::io::intcode::*;
-use std::mem;
-use std::ptr;
-use std::str::FromStr;
-use std::f32::consts;
-
-#[allow(non_camel_case_types)]
-#[derive(Clone,Copy,PartialEq)]
-enum M4AType {
- None,
- Main,
- LC,
- SSR,
- LTP,
- SBR,
- Scalable,
- TwinVQ,
- CELP,
- HVXC,
- TTSI,
- MainSynth,
- WavetableSynth,
- GeneralMIDI,
- Algorithmic,
- ER_AAC_LC,
- ER_AAC_LTP,
- ER_AAC_Scalable,
- ER_TwinVQ,
- ER_BSAC,
- ER_AAC_LD,
- ER_CELP,
- ER_HVXC,
- ER_HILN,
- ER_Parametric,
- SSC,
- PS,
- MPEGSurround,
- Layer1,
- Layer2,
- Layer3,
- DST,
- ALS,
- SLS,
- SLSNonCore,
- ER_AAC_ELD,
- SMRSimple,
- SMRMain,
- Reserved,
- Unknown,
-}
-
-const M4A_TYPES: &[M4AType] = &[
- M4AType::None, M4AType::Main, M4AType::LC, M4AType::SSR,
- M4AType::LTP, M4AType::SBR, M4AType::Scalable, M4AType::TwinVQ,
- M4AType::CELP, M4AType::HVXC, M4AType::Reserved, M4AType::Reserved,
- M4AType::TTSI, M4AType::MainSynth, M4AType::WavetableSynth, M4AType::GeneralMIDI,
- M4AType::Algorithmic, M4AType::ER_AAC_LC, M4AType::Reserved, M4AType::ER_AAC_LTP,
- M4AType::ER_AAC_Scalable, M4AType::ER_TwinVQ, M4AType::ER_BSAC, M4AType::ER_AAC_LD,
- M4AType::ER_CELP, M4AType::ER_HVXC, M4AType::ER_HILN, M4AType::ER_Parametric,
- M4AType::SSC, M4AType::PS, M4AType::MPEGSurround, M4AType::Reserved /*escape*/,
- M4AType::Layer1, M4AType::Layer2, M4AType::Layer3, M4AType::DST,
- M4AType::ALS, M4AType::SLS, M4AType::SLSNonCore, M4AType::ER_AAC_ELD,
- M4AType::SMRSimple, M4AType::SMRMain,
-];
-const M4A_TYPE_NAMES: &[&str] = &[
- "None", "AAC Main", "AAC LC", "AAC SSR", "AAC LTP", "SBR", "AAC Scalable", "TwinVQ", "CELP", "HVXC",
- /*"(reserved10)", "(reserved11)", */ "TTSI",
- "Main synthetic", "Wavetable synthesis", "General MIDI", "Algorithmic Synthesis and Audio FX",
- "ER AAC LC", /*"(reserved18)",*/ "ER AAC LTP", "ER AAC Scalable", "ER TwinVQ", "ER BSAC", "ER AAC LD",
- "ER CELP", "ER HVXC", "ER HILN", "ER Parametric", "SSC", "PS", "MPEG Surround", /*"(escape)",*/
- "Layer-1", "Layer-2", "Layer-3", "DST", "ALS", "SLS", "SLS non-core", "ER AAC ELD", "SMR Simple", "SMR Main",
- "(reserved)", "(unknown)",
-];
-
-impl fmt::Display for M4AType {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- write!(f, "{}", M4A_TYPE_NAMES[*self as usize])
- }
-}
-
-const AAC_SAMPLE_RATES: [u32; 16] = [
- 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
- 16000, 12000, 11025, 8000, 7350, 0, 0, 0
-];
-
-const AAC_CHANNELS: [usize; 8] = [ 0, 1, 2, 3, 4, 5, 6, 8 ];
-
-struct M4AInfo {
- otype: M4AType,
- srate: u32,
- channels: usize,
- samples: usize,
- sbr_ps_info: Option<(u32, usize)>,
- sbr_present: bool,
- ps_present: bool,
-}
-
-impl M4AInfo {
- fn new() -> Self {
- Self {
- otype: M4AType::None,
- srate: 0,
- channels: 0,
- samples: 0,
- sbr_ps_info: Option::None,
- sbr_present: false,
- ps_present: false,
- }
- }
- fn read_object_type(br: &mut BitReader) -> DecoderResult<M4AType> {
- let otypeidx;
- if br.peek(5) == 31 {
- br.skip(5)?;
- otypeidx = (br.read(6)? as usize) + 32;
- } else {
- otypeidx = br.read(5)? as usize;
- }
- if otypeidx >= M4A_TYPES.len() {
- Ok(M4AType::Unknown)
- } else {
- Ok(M4A_TYPES[otypeidx])
- }
- }
- fn read_sampling_frequency(br: &mut BitReader) -> DecoderResult<u32> {
- if br.peek(4) == 15 {
- let srate = br.read(24)?;
- Ok(srate)
- } else {
- let srate_idx = br.read(4)? as usize;
- Ok(AAC_SAMPLE_RATES[srate_idx])
- }
- }
- fn read_channel_config(br: &mut BitReader) -> DecoderResult<usize> {
- let chidx = br.read(4)? as usize;
- if chidx < AAC_CHANNELS.len() {
- Ok(AAC_CHANNELS[chidx])
- } else {
- Ok(chidx)
- }
- }
- fn read(&mut self, src: &[u8]) -> DecoderResult<()> {
- let mut br = BitReader::new(src, BitReaderMode::BE);
- self.otype = Self::read_object_type(&mut br)?;
- self.srate = Self::read_sampling_frequency(&mut br)?;
- validate!(self.srate > 0);
- self.channels = Self::read_channel_config(&mut br)?;
-
- if (self.otype == M4AType::SBR) || (self.otype == M4AType::PS) {
- let ext_srate = Self::read_sampling_frequency(&mut br)?;
- self.otype = Self::read_object_type(&mut br)?;
- let ext_chans;
- if self.otype == M4AType::ER_BSAC {
- ext_chans = Self::read_channel_config(&mut br)?;
- } else {
- ext_chans = 0;
- }
- self.sbr_ps_info = Some((ext_srate, ext_chans));
- }
-
- match self.otype {
- M4AType::Main | M4AType::LC | M4AType::SSR | M4AType::Scalable | M4AType::TwinVQ |
- M4AType::ER_AAC_LC | M4AType::ER_AAC_LTP | M4AType::ER_AAC_Scalable | M4AType::ER_TwinVQ |
- M4AType::ER_BSAC | M4AType::ER_AAC_LD => {
- // GASpecificConfig
- let short_frame = br.read_bool()?;
- self.samples = if short_frame { 960 } else { 1024 };
- let depends_on_core = br.read_bool()?;
- if depends_on_core {
- let _delay = br.read(14)?;
- }
- let extension_flag = br.read_bool()?;
- if self.channels == 0 {
- unimplemented!("program config element");
- }
- if (self.otype == M4AType::Scalable) || (self.otype == M4AType::ER_AAC_Scalable) {
- let _layer = br.read(3)?;
- }
- if extension_flag {
- if self.otype == M4AType::ER_BSAC {
- let _num_subframes = br.read(5)? as usize;
- let _layer_length = br.read(11)?;
- }
- if (self.otype == M4AType::ER_AAC_LC) ||
- (self.otype == M4AType::ER_AAC_LTP) ||
- (self.otype == M4AType::ER_AAC_Scalable) ||
- (self.otype == M4AType::ER_AAC_LD) {
- let _section_data_resilience = br.read_bool()?;
- let _scalefactors_resilience = br.read_bool()?;
- let _spectral_data_resilience = br.read_bool()?;
- }
- let extension_flag3 = br.read_bool()?;
- if extension_flag3 {
- unimplemented!("version3 extensions");
- }
- }
- },
- M4AType::CELP => { unimplemented!("CELP config"); },
- M4AType::HVXC => { unimplemented!("HVXC config"); },
- M4AType::TTSI => { unimplemented!("TTS config"); },
- M4AType::MainSynth | M4AType::WavetableSynth | M4AType::GeneralMIDI | M4AType::Algorithmic => { unimplemented!("structured audio config"); },
- M4AType::ER_CELP => { unimplemented!("ER CELP config"); },
- M4AType::ER_HVXC => { unimplemented!("ER HVXC config"); },
- M4AType::ER_HILN | M4AType::ER_Parametric => { unimplemented!("parametric config"); },
- M4AType::SSC => { unimplemented!("SSC config"); },
- M4AType::MPEGSurround => {
- br.skip(1)?; // sacPayloadEmbedding
- unimplemented!("MPEG Surround config");
- },
- M4AType::Layer1 | M4AType::Layer2 | M4AType::Layer3 => { unimplemented!("MPEG Layer 1/2/3 config"); },
- M4AType::DST => { unimplemented!("DST config"); },
- M4AType::ALS => {
- br.skip(5)?; // fillBits
- unimplemented!("ALS config");
- },
- M4AType::SLS | M4AType::SLSNonCore => { unimplemented!("SLS config"); },
- M4AType::ER_AAC_ELD => { unimplemented!("ELD config"); },
- M4AType::SMRSimple | M4AType::SMRMain => { unimplemented!("symbolic music config"); },
- _ => {},
- };
- match self.otype {
- M4AType::ER_AAC_LC | M4AType::ER_AAC_LTP | M4AType::ER_AAC_Scalable | M4AType::ER_TwinVQ |
- M4AType::ER_BSAC | M4AType::ER_AAC_LD | M4AType::ER_CELP | M4AType::ER_HVXC |
- M4AType::ER_HILN | M4AType::ER_Parametric | M4AType::ER_AAC_ELD => {
- let ep_config = br.read(2)?;
- if (ep_config == 2) || (ep_config == 3) {
- unimplemented!("error protection config");
- }
- if ep_config == 3 {
- let direct_mapping = br.read_bool()?;
- validate!(direct_mapping);
- }
- },
- _ => {},
- };
- if self.sbr_ps_info.is_some() && (br.left() >= 16) {
- let sync = br.read(11)?;
- if sync == 0x2B7 {
- let ext_otype = Self::read_object_type(&mut br)?;
- if ext_otype == M4AType::SBR {
- self.sbr_present = br.read_bool()?;
- if self.sbr_present {
- let _ext_srate = Self::read_sampling_frequency(&mut br)?;
- if br.left() >= 12 {
- let sync = br.read(11)?;
- if sync == 0x548 {
- self.ps_present = br.read_bool()?;
- }
- }
- }
- }
- if ext_otype == M4AType::PS {
- self.sbr_present = br.read_bool()?;
- if self.sbr_present {
- let _ext_srate = Self::read_sampling_frequency(&mut br)?;
- }
- let _ext_channels = br.read(4)?;
- }
- }
- }
-
- Ok(())
- }
-}
-
-impl fmt::Display for M4AInfo {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- write!(f, "MPEG 4 Audio {}, {} Hz, {} channels, {} samples per frame",
- self.otype, self.srate, self.channels, self.samples)
- }
-}
-
-const MAX_WINDOWS: usize = 8;
-const MAX_SFBS: usize = 64;
-
-#[derive(Clone,Copy)]
-struct ICSInfo {
- window_sequence: u8,
- prev_window_sequence: u8,
- window_shape: bool,
- prev_window_shape: bool,
- scale_factor_grouping: [bool; MAX_WINDOWS],
- group_start: [usize; MAX_WINDOWS],
- window_groups: usize,
- num_windows: usize,
- max_sfb: usize,
- predictor_data: Option<LTPData>,
- long_win: bool,
-}
-
-const ONLY_LONG_SEQUENCE: u8 = 0;
-const LONG_START_SEQUENCE: u8 = 1;
-const EIGHT_SHORT_SEQUENCE: u8 = 2;
-const LONG_STOP_SEQUENCE: u8 = 3;
-
-impl ICSInfo {
- fn new() -> Self {
- Self {
- window_sequence: 0,
- prev_window_sequence: 0,
- window_shape: false,
- prev_window_shape: false,
- scale_factor_grouping: [false; MAX_WINDOWS],
- group_start: [0; MAX_WINDOWS],
- num_windows: 0,
- window_groups: 0,
- max_sfb: 0,
- predictor_data: None,
- long_win: true,
- }
- }
- fn decode_ics_info(&mut self, br: &mut BitReader) -> DecoderResult<()> {
- self.prev_window_sequence = self.window_sequence;
- self.prev_window_shape = self.window_shape;
- let ics_reserved_bit = br.read(1)?;
- validate!(ics_reserved_bit == 0);
- self.window_sequence = br.read(2)? as u8;
- match self.prev_window_sequence {
- ONLY_LONG_SEQUENCE | LONG_STOP_SEQUENCE => {
- if (self.window_sequence != ONLY_LONG_SEQUENCE) &&
- (self.window_sequence != LONG_START_SEQUENCE) {
- println!("incorrect previous window");
- }
- },
- LONG_START_SEQUENCE | EIGHT_SHORT_SEQUENCE => {
- if (self.window_sequence != EIGHT_SHORT_SEQUENCE) &&
- (self.window_sequence != LONG_STOP_SEQUENCE) {
- println!("incorrect previous window");
- }
- },
- _ => {},
- };
- self.window_shape = br.read_bool()?;
- self.window_groups = 1;
- if self.window_sequence == EIGHT_SHORT_SEQUENCE {
- self.long_win = false;
- self.num_windows = 8;
- self.max_sfb = br.read(4)? as usize;
- for i in 0..MAX_WINDOWS-1 {
- self.scale_factor_grouping[i] = br.read_bool()?;
- if !self.scale_factor_grouping[i] {
- self.group_start[self.window_groups] = i + 1;
- self.window_groups += 1;
- }
- }
- } else {
- self.long_win = true;
- self.num_windows = 1;
- self.max_sfb = br.read(6)? as usize;
- self.predictor_data = LTPData::read(br)?;
- }
- Ok(())
- }
- fn get_group_start(&self, g: usize) -> usize {
- if g == 0 {
- 0
- } else if g >= self.window_groups {
- if self.long_win { 1 } else { 8 }
- } else {
- self.group_start[g]
- }
- }
-}
-
-#[derive(Clone,Copy)]
-struct LTPData {
-}
-
-impl LTPData {
- fn read(br: &mut BitReader) -> DecoderResult<Option<Self>> {
- let predictor_data_present = br.read_bool()?;
- if !predictor_data_present { return Ok(None); }
-unimplemented!("predictor data");
-/*
- if is_main {
- let predictor_reset = br.read_bool()?;
- if predictor_reset {
- let predictor_reset_group_number = br.read(5)?;
- }
- for sfb in 0..max_sfb.min(PRED_SFB_MAX) {
- prediction_used[sfb] = br.read_bool()?;
- }
- } else {
- let ltp_data_present = br.read_bool()?;
- if ltp_data_present {
- //ltp data
- }
- if common_window {
- let ltp_data_present = br.read_bool()?;
- if ltp_data_present {
- //ltp data
- }
- }
- }
- Ok(Some(Self { }))
-*/
- }
-}
-
-#[derive(Clone,Copy)]
-#[allow(dead_code)]
-struct PulseData {
- number_pulse: usize,
- pulse_start_sfb: usize,
- pulse_offset: [u8; 4],
- pulse_amp: [u8; 4],
-}
-
-impl PulseData {
- fn read(br: &mut BitReader) -> DecoderResult<Option<Self>> {
- let pulse_data_present = br.read_bool()?;
- if !pulse_data_present { return Ok(None); }
-
- let number_pulse = (br.read(2)? as usize) + 1;
- let pulse_start_sfb = br.read(6)? as usize;
- let mut pulse_offset: [u8; 4] = [0; 4];
- let mut pulse_amp: [u8; 4] = [0; 4];
- for i in 0..number_pulse {
- pulse_offset[i] = br.read(5)? as u8;
- pulse_amp[i] = br.read(4)? as u8;
- }
- Ok(Some(Self{ number_pulse, pulse_start_sfb, pulse_offset, pulse_amp }))
- }
-}
-
-const TNS_MAX_ORDER: usize = 20;
-const TNS_MAX_LONG_BANDS: [usize; 12] = [ 31, 31, 34, 40, 42, 51, 46, 46, 42, 42, 42, 39 ];
-const TNS_MAX_SHORT_BANDS: [usize; 12] = [ 9, 9, 10, 14, 14, 14, 14, 14, 14, 14, 14, 14 ];
-
-#[derive(Clone,Copy)]
-struct TNSCoeffs {
- length: usize,
- order: usize,
- direction: bool,
- compress: bool,
- coef: [f32; TNS_MAX_ORDER + 1],
-}
-
-impl TNSCoeffs {
- fn new() -> Self {
- Self {
- length: 0, order: 0, direction: false, compress: false, coef: [0.0; TNS_MAX_ORDER + 1],
- }
- }
- fn read(&mut self, br: &mut BitReader, long_win: bool, coef_res: bool, max_order: usize) -> DecoderResult<()> {
- self.length = br.read(if long_win { 6 } else { 4 })? as usize;
- self.order = br.read(if long_win { 5 } else { 3 })? as usize;
- validate!(self.order <= max_order);
- if self.order > 0 {
- self.direction = br.read_bool()?;
- self.compress = br.read_bool()?;
- let mut coef_bits = 3;
- if coef_res { coef_bits += 1; }
- if self.compress { coef_bits -= 1; }
- let sign_mask = 1 << (coef_bits - 1);
- let neg_mask = !(sign_mask * 2 - 1);
-
- let fac_base = if coef_res { 1 << 3 } else { 1 << 2 } as f32;
- let iqfac = (fac_base - 0.5) / (consts::PI / 2.0);
- let iqfac_m = (fac_base + 0.5) / (consts::PI / 2.0);
- let mut tmp: [f32; TNS_MAX_ORDER] = [0.0; TNS_MAX_ORDER];
- for el in tmp.iter_mut().take(self.order) {
- let val = br.read(coef_bits)? as i8;
- let c = f32::from(if (val & sign_mask) != 0 { val | neg_mask } else { val });
- *el = (if c >= 0.0 { c / iqfac } else { c / iqfac_m }).sin();
- }
- // convert to LPC coefficients
- let mut b: [f32; TNS_MAX_ORDER + 1] = [0.0; TNS_MAX_ORDER + 1];
- for m in 1..=self.order {
- for i in 1..m {
- b[i] = self.coef[i - 1] + tmp[m - 1] * self.coef[m - i - 1];
- }
- for i in 1..m {
- self.coef[i - 1] = b[i];
- }
- self.coef[m - 1] = tmp[m - 1];
- }
- }
- Ok(())
- }
-}
-
-#[derive(Clone,Copy)]
-#[allow(dead_code)]
-struct TNSData {
- n_filt: [usize; MAX_WINDOWS],
- coef_res: [bool; MAX_WINDOWS],
- coeffs: [[TNSCoeffs; 4]; MAX_WINDOWS],
-}
-
-impl TNSData {
- fn read(br: &mut BitReader, long_win: bool, num_windows: usize, max_order: usize) -> DecoderResult<Option<Self>> {
- let tns_data_present = br.read_bool()?;
- if !tns_data_present { return Ok(None); }
- let mut n_filt: [usize; MAX_WINDOWS] = [0; MAX_WINDOWS];
- let mut coef_res: [bool; MAX_WINDOWS] = [false; MAX_WINDOWS];
- let mut coeffs: [[TNSCoeffs; 4]; MAX_WINDOWS] = [[TNSCoeffs::new(); 4]; MAX_WINDOWS];
- for w in 0..num_windows {
- n_filt[w] = br.read(if long_win { 2 } else { 1 })? as usize;
- if n_filt[w] != 0 {
- coef_res[w] = br.read_bool()?;
- }
- for filt in 0..n_filt[w] {
- coeffs[w][filt].read(br, long_win, coef_res[w], max_order)?;
- }
- }
- Ok(Some(Self { n_filt, coef_res, coeffs }))
- }
-}
-
-#[derive(Clone,Copy)]
-#[allow(dead_code)]
-struct GainControlData {
- max_band: u8,
-}
-
-impl GainControlData {
- fn read(br: &mut BitReader) -> DecoderResult<Option<Self>> {
- let gain_control_data_present = br.read_bool()?;
- if !gain_control_data_present { return Ok(None); }
-unimplemented!("gain control data");
-/* self.max_band = br.read(2)? as u8;
- if window_sequence == ONLY_LONG_SEQUENCE {
- for bd in 0..max_band
-...
- }
- Ok(Some(Self { }))*/
- }
-}
-
-const ZERO_HCB: u8 = 0;
-const FIRST_PAIR_HCB: u8 = 5;
-const ESC_HCB: u8 = 11;
-const RESERVED_HCB: u8 = 12;
-const NOISE_HCB: u8 = 13;
-const INTENSITY_HCB2: u8 = 14;
-const INTENSITY_HCB: u8 = 15;
-
-struct Codebooks {
- scale_cb: Codebook<i8>,
- spec_cb: [Codebook<u16>; 11],
-}
-
-fn scale_map(idx: usize) -> i8 { (idx as i8) - 60 }
-fn cb_map(idx: usize) -> u16 { idx as u16 }
-
-impl Codebooks {
- fn new() -> Self {
- let mut coderead = TableCodebookDescReader::new(AAC_SCF_CODEBOOK_CODES, AAC_SCF_CODEBOOK_BITS, scale_map);
- let scale_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
- let spec_cb = unsafe {
- let mut uspec_cb: mem::MaybeUninit::<[Codebook<u16>; 11]> = mem::MaybeUninit::uninit();
- for i in 0..AAC_SPEC_CODES.len() {
- let mut coderead = TableCodebookDescReader::new(AAC_SPEC_CODES[i], AAC_SPEC_BITS[i], cb_map);
- ptr::write(&mut (*uspec_cb.as_mut_ptr())[i], Codebook::new(&mut coderead, CodebookMode::MSB).unwrap());
- }
- uspec_cb.assume_init()
- };
- Self { scale_cb, spec_cb }
- }
-}
-
-#[derive(Clone)]
-struct ICS {
- global_gain: u8,
- info: ICSInfo,
- pulse_data: Option<PulseData>,
- tns_data: Option<TNSData>,
- gain_control: Option<GainControlData>,
- sect_cb: [[u8; MAX_SFBS]; MAX_WINDOWS],
- sect_len: [[usize; MAX_SFBS]; MAX_WINDOWS],
- sfb_cb: [[u8; MAX_SFBS]; MAX_WINDOWS],
- num_sec: [usize; MAX_WINDOWS],
- scales: [[u8; MAX_SFBS]; MAX_WINDOWS],
- sbinfo: GASubbandInfo,
- coeffs: [f32; 1024],
- delay: [f32; 1024],
-}
-
-const INTENSITY_SCALE_MIN: i16 = -155;
-const NOISE_SCALE_MIN: i16 = -100;
-impl ICS {
- fn new(sbinfo: GASubbandInfo) -> Self {
- Self {
- global_gain: 0,
- info: ICSInfo::new(),
- pulse_data: None,
- tns_data: None,
- gain_control: None,
- sect_cb: [[0; MAX_SFBS]; MAX_WINDOWS],
- sect_len: [[0; MAX_SFBS]; MAX_WINDOWS],
- sfb_cb: [[0; MAX_SFBS]; MAX_WINDOWS],
- scales: [[0; MAX_SFBS]; MAX_WINDOWS],
- num_sec: [0; MAX_WINDOWS],
- sbinfo,
- coeffs: [0.0; 1024],
- delay: [0.0; 1024],
- }
- }
- fn decode_section_data(&mut self, br: &mut BitReader, may_have_intensity: bool) -> DecoderResult<()> {
- let sect_bits = if self.info.long_win { 5 } else { 3 };
- let sect_esc_val = (1 << sect_bits) - 1;
-
- for g in 0..self.info.window_groups {
- let mut k = 0;
- let mut l = 0;
- while k < self.info.max_sfb {
- self.sect_cb[g][l] = br.read(4)? as u8;
- self.sect_len[g][l] = 0;
- validate!(self.sect_cb[g][l] != RESERVED_HCB);
- if ((self.sect_cb[g][l] == INTENSITY_HCB) || (self.sect_cb[g][l] == INTENSITY_HCB2)) && !may_have_intensity {
- return Err(DecoderError::InvalidData);
- }
- loop {
- let sect_len_incr = br.read(sect_bits)? as usize;
- self.sect_len[g][l] += sect_len_incr;
- if sect_len_incr < sect_esc_val { break; }
- }
- validate!(k + self.sect_len[g][l] <= self.info.max_sfb);
- for _ in 0..self.sect_len[g][l] {
- self.sfb_cb[g][k] = self.sect_cb[g][l];
- k += 1;
- }
- l += 1;
- }
- self.num_sec[g] = l;
- }
- Ok(())
- }
- fn is_intensity(&self, g: usize, sfb: usize) -> bool {
- (self.sfb_cb[g][sfb] == INTENSITY_HCB) || (self.sfb_cb[g][sfb] == INTENSITY_HCB2)
- }
- fn get_intensity_dir(&self, g: usize, sfb: usize) -> bool {
- self.sfb_cb[g][sfb] == INTENSITY_HCB
- }
- fn decode_scale_factor_data(&mut self, br: &mut BitReader, codebooks: &Codebooks) -> DecoderResult<()> {
- let mut noise_pcm_flag = true;
- let mut scf_normal = i16::from(self.global_gain);
- let mut scf_intensity = 0i16;
- let mut scf_noise = 0i16;
- for g in 0..self.info.window_groups {
- for sfb in 0..self.info.max_sfb {
- if self.sfb_cb[g][sfb] != ZERO_HCB {
- if self.is_intensity(g, sfb) {
- let diff = i16::from(br.read_cb(&codebooks.scale_cb)?);
- scf_intensity += diff;
- validate!((scf_intensity >= INTENSITY_SCALE_MIN) && (scf_intensity < INTENSITY_SCALE_MIN + 256));
- self.scales[g][sfb] = (scf_intensity - INTENSITY_SCALE_MIN) as u8;
- } else if self.sfb_cb[g][sfb] == NOISE_HCB {
- if noise_pcm_flag {
- noise_pcm_flag = false;
- scf_noise = (br.read(9)? as i16) - 256 + i16::from(self.global_gain) - 90;
- } else {
- scf_noise += i16::from(br.read_cb(&codebooks.scale_cb)?);
- }
- validate!((scf_noise >= NOISE_SCALE_MIN) && (scf_noise < NOISE_SCALE_MIN + 256));
- self.scales[g][sfb] = (scf_noise - NOISE_SCALE_MIN) as u8;
- } else {
- scf_normal += i16::from(br.read_cb(&codebooks.scale_cb)?);
- validate!((scf_normal >= 0) && (scf_normal < 255));
- self.scales[g][sfb] = scf_normal as u8;
- }
- }
- }
- }
- Ok(())
- }
- fn get_band_start(&self, swb: usize) -> usize {
- if self.info.long_win {
- self.sbinfo.long_bands[swb]
- } else {
- self.sbinfo.short_bands[swb]
- }
- }
- fn get_num_bands(&self) -> usize {
- if self.info.long_win {
- self.sbinfo.long_bands.len() - 1
- } else {
- self.sbinfo.short_bands.len() - 1
- }
- }
- fn decode_spectrum(&mut self, br: &mut BitReader, codebooks: &Codebooks) -> DecoderResult<()> {
- self.coeffs = [0.0; 1024];
- for g in 0..self.info.window_groups {
- let cur_w = self.info.get_group_start(g);
- let next_w = self.info.get_group_start(g + 1);
- for sfb in 0..self.info.max_sfb {
- let start = self.get_band_start(sfb);
- let end = self.get_band_start(sfb + 1);
- let cb_idx = self.sfb_cb[g][sfb];
- for w in cur_w..next_w {
- let dst = &mut self.coeffs[start + w*128..end + w*128];
- match cb_idx {
- ZERO_HCB => { /* zeroes */ },
- NOISE_HCB => { /* noise */ },
- INTENSITY_HCB | INTENSITY_HCB2 => { /* intensity */ },
- _ => {
- let unsigned = AAC_UNSIGNED_CODEBOOK[(cb_idx - 1) as usize];
- let scale = get_scale(self.scales[g][sfb]);
- let cb = &codebooks.spec_cb[(cb_idx - 1) as usize];
- if cb_idx < FIRST_PAIR_HCB {
- decode_quads(br, cb, unsigned, scale, dst)?;
- } else {
- decode_pairs(br, cb, unsigned, cb_idx == ESC_HCB,
- AAC_CODEBOOK_MODULO[(cb_idx - FIRST_PAIR_HCB) as usize], scale, dst)?;
- }
- },
- };
- }
- }
- }
- Ok(())
- }
- fn place_pulses(&mut self) {
- if let Some(ref pdata) = self.pulse_data {
- if pdata.pulse_start_sfb >= self.sbinfo.long_bands.len() - 1 { return; }
- let mut k = self.get_band_start(pdata.pulse_start_sfb);
- let mut band = pdata.pulse_start_sfb;
- for pno in 0..pdata.number_pulse {
- k += pdata.pulse_offset[pno] as usize;
- if k >= 1024 { return; }
- while self.get_band_start(band + 1) <= k { band += 1; }
- let scale = get_scale(self.scales[0][band]);
- let mut base = self.coeffs[k];
- if base != 0.0 {
- base = requant(self.coeffs[k], scale);
- }
- if base > 0.0 {
- base += f32::from(pdata.pulse_amp[pno]);
- } else {
- base -= f32::from(pdata.pulse_amp[pno]);
- }
- self.coeffs[k] = iquant(base) * scale;
- }
- }
- }
- fn decode_ics(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType, common_window: bool, may_have_intensity: bool) -> DecoderResult<()> {
- self.global_gain = br.read(8)? as u8;
- if !common_window {
- self.info.decode_ics_info(br)?;
- }
- self.decode_section_data(br, may_have_intensity)?;
- self.decode_scale_factor_data(br, codebooks)?;
- self.pulse_data = PulseData::read(br)?;
- validate!(self.pulse_data.is_none() || self.info.long_win);
- let tns_max_order;
- if !self.info.long_win {
- tns_max_order = 7;
- } else if m4atype == M4AType::LC {
- tns_max_order = 12;
- } else {
- tns_max_order = TNS_MAX_ORDER;
- }
- self.tns_data = TNSData::read(br, self.info.long_win, self.info.num_windows, tns_max_order)?;
- if m4atype == M4AType::SSR {
- self.gain_control = GainControlData::read(br)?;
- } else {
- let gain_control_data_present = br.read_bool()?;
- validate!(!gain_control_data_present);
- }
- self.decode_spectrum(br, codebooks)?;
- Ok(())
- }
- fn synth_channel(&mut self, dsp: &mut DSP, dst: &mut [f32], srate_idx: usize) {
- self.place_pulses();
- if let Some(ref tns_data) = self.tns_data {
- let tns_max_bands = (if self.info.long_win {
- TNS_MAX_LONG_BANDS[srate_idx]
- } else {
- TNS_MAX_SHORT_BANDS[srate_idx]
- }).min(self.info.max_sfb);
- for w in 0..self.info.num_windows {
- let mut bottom = self.get_num_bands();
- for f in 0..tns_data.n_filt[w] {
- let top = bottom;
- bottom = if top >= tns_data.coeffs[w][f].length { top - tns_data.coeffs[w][f].length } else { 0 };
- let order = tns_data.coeffs[w][f].order;
- if order == 0 { continue; }
- let start = w * 128 + self.get_band_start(tns_max_bands.min(bottom));
- let end = w * 128 + self.get_band_start(tns_max_bands.min(top));
- let lpc = &tns_data.coeffs[w][f].coef;
- let mut state = [0.0f32; 64];
- let mut sidx = 32;
- if !tns_data.coeffs[w][f].direction {
- for m in start..end {
- for i in 0..order {
- self.coeffs[m] -= state[(sidx + i) & 63] * lpc[i];
- }
- sidx = (sidx + 63) & 63;
- state[sidx] = self.coeffs[m];
- }
- } else {
- for m in (start..end).rev() {
- for i in 0..order {
- self.coeffs[m] -= state[(sidx + i) & 63] * lpc[i];
- }
- sidx = (sidx + 63) & 63;
- state[sidx] = self.coeffs[m];
- }
- }
- }
- }
- }
- dsp.synth(&self.coeffs, &mut self.delay, self.info.window_sequence, self.info.window_shape, self.info.prev_window_shape, dst);
- }
-}
-
-fn get_scale(scale: u8) -> f32 {
- 2.0f32.powf(0.25 * (f32::from(scale) - 100.0 - 56.0))
-}
-fn iquant(val: f32) -> f32 {
- if val < 0.0 {
- -((-val).powf(4.0 / 3.0))
- } else {
- val.powf(4.0 / 3.0)
- }
-}
-fn requant(val: f32, scale: f32) -> f32 {
- if scale == 0.0 { return 0.0; }
- let bval = val / scale;
- if bval >= 0.0 {
- val.powf(3.0 / 4.0)
- } else {
- -((-val).powf(3.0 / 4.0))
- }
-}
-fn decode_quads(br: &mut BitReader, cb: &Codebook<u16>, unsigned: bool, scale: f32, dst: &mut [f32]) -> DecoderResult<()> {
- for out in dst.chunks_mut(4) {
- let cw = br.read_cb(cb)? as usize;
- if unsigned {
- for i in 0..4 {
- let val = AAC_QUADS[cw][i];
- if val != 0 {
- if br.read_bool()? {
- out[i] = iquant(-f32::from(val)) * scale;
- } else {
- out[i] = iquant( f32::from(val)) * scale;
- }
- }
- }
- } else {
- for i in 0..4 {
- out[i] = iquant(f32::from(AAC_QUADS[cw][i] - 1)) * scale;
- }
- }
- }
- Ok(())
-}
-fn decode_pairs(br: &mut BitReader, cb: &Codebook<u16>, unsigned: bool, escape: bool, modulo: u16, scale: f32, dst: &mut [f32]) -> DecoderResult<()> {
- for out in dst.chunks_mut(2) {
- let cw = br.read_cb(cb)?;
- let mut x = (cw / modulo) as i16;
- let mut y = (cw % modulo) as i16;
- if unsigned {
- if x != 0 && br.read_bool()? {
- x = -x;
- }
- if y != 0 && br.read_bool()? {
- y = -y;
- }
- } else {
- x -= (modulo >> 1) as i16;
- y -= (modulo >> 1) as i16;
- }
- if escape {
- if (x == 16) || (x == -16) {
- x += read_escape(br, x > 0)?;
- }
- if (y == 16) || (y == -16) {
- y += read_escape(br, y > 0)?;
- }
- }
- out[0] = iquant(f32::from(x)) * scale;
- out[1] = iquant(f32::from(y)) * scale;
- }
- Ok(())
-}
-fn read_escape(br: &mut BitReader, sign: bool) -> DecoderResult<i16> {
- let prefix = br.read_code(UintCodeType::UnaryOnes)? as u8;
- validate!(prefix < 9);
- let bits = br.read(prefix + 4)? as i16;
- let bits = bits | (1 << (prefix + 4));
- if sign {
- Ok(bits)
- } else {
- Ok(-bits)
- }
-}
-
-#[derive(Clone)]
-struct ChannelPair {
- pair: bool,
- channel: usize,
- common_window: bool,
- ms_mask_present: u8,
- ms_used: [[bool; MAX_SFBS]; MAX_WINDOWS],
- ics: [ICS; 2],
-}
-
-impl ChannelPair {
- fn new(pair: bool, channel: usize, sbinfo: GASubbandInfo) -> Self {
- Self {
- pair, channel,
- common_window: false,
- ms_mask_present: 0,
- ms_used: [[false; MAX_SFBS]; MAX_WINDOWS],
- ics: [ICS::new(sbinfo), ICS::new(sbinfo)],
- }
- }
- fn decode_ga_sce(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType) -> DecoderResult<()> {
- self.ics[0].decode_ics(br, codebooks, m4atype, false, false)?;
- Ok(())
- }
- fn decode_ga_cpe(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType) -> DecoderResult<()> {
- let common_window = br.read_bool()?;
- self.common_window = common_window;
- if common_window {
- self.ics[0].info.decode_ics_info(br)?;
- self.ms_mask_present = br.read(2)? as u8;
- validate!(self.ms_mask_present != 3);
- if self.ms_mask_present == 1 {
- for g in 0..self.ics[0].info.window_groups {
- for sfb in 0..self.ics[0].info.max_sfb {
- self.ms_used[g][sfb] = br.read_bool()?;
- }
- }
- }
- self.ics[1].info = self.ics[0].info;
- }
- self.ics[0].decode_ics(br, codebooks, m4atype, common_window, true)?;
- self.ics[1].decode_ics(br, codebooks, m4atype, common_window, true)?;
- if common_window && self.ms_mask_present != 0 {
- let mut g = 0;
- for w in 0..self.ics[0].info.num_windows {
- if w > 0 && !self.ics[0].info.scale_factor_grouping[w - 1] {
- g += 1;
- }
- for sfb in 0..self.ics[0].info.max_sfb {
- let start = w * 128 + self.ics[0].get_band_start(sfb);
- let end = w * 128 + self.ics[0].get_band_start(sfb + 1);
- if self.ics[0].is_intensity(g, sfb) {
- let invert = (self.ms_mask_present == 1) && self.ms_used[g][sfb];
- let dir = self.ics[0].get_intensity_dir(g, sfb) ^ invert;
- let scale = 0.5f32.powf(0.25 * (f32::from(self.ics[0].scales[g][sfb]) + f32::from(INTENSITY_SCALE_MIN)));
- if !dir {
- for i in start..end {
- self.ics[1].coeffs[i] = scale * self.ics[0].coeffs[i];
- }
- } else {
- for i in start..end {
- self.ics[1].coeffs[i] = -scale * self.ics[0].coeffs[i];
- }
- }
- } else if (self.ms_mask_present == 2) || self.ms_used[g][sfb] {
- for i in start..end {
- let tmp = self.ics[0].coeffs[i] - self.ics[1].coeffs[i];
- self.ics[0].coeffs[i] += self.ics[1].coeffs[i];
- self.ics[1].coeffs[i] = tmp;
- }
- }
- }
- }
- }
- Ok(())
- }
- fn synth_audio(&mut self, dsp: &mut DSP, abuf: &mut NABufferType, srate_idx: usize) {
- let mut adata = abuf.get_abuf_f32().unwrap();
- let output = adata.get_data_mut().unwrap();
- let off0 = abuf.get_offset(self.channel);
- let off1 = abuf.get_offset(self.channel + 1);
- self.ics[0].synth_channel(dsp, &mut output[off0..], srate_idx);
- if self.pair {
- self.ics[1].synth_channel(dsp, &mut output[off1..], srate_idx);
- }
- }
-}
-
-struct DSP {
- kbd_long_win: [f32; 1024],
- kbd_short_win: [f32; 128],
- sine_long_win: [f32; 1024],
- sine_short_win: [f32; 128],
- imdct_long: IMDCT,
- imdct_short: IMDCT,
- tmp: [f32; 2048],
- ew_buf: [f32; 1152],
-}
-
-const SHORT_WIN_POINT0: usize = 512 - 64;
-const SHORT_WIN_POINT1: usize = 512 + 64;
-
-impl DSP {
- fn new() -> Self {
- let mut kbd_long_win: [f32; 1024] = [0.0; 1024];
- let mut kbd_short_win: [f32; 128] = [0.0; 128];
- generate_window(WindowType::KaiserBessel(4.0), 1.0, 1024, true, &mut kbd_long_win);
- generate_window(WindowType::KaiserBessel(6.0), 1.0, 128, true, &mut kbd_short_win);
- let mut sine_long_win: [f32; 1024] = [0.0; 1024];
- let mut sine_short_win: [f32; 128] = [0.0; 128];
- generate_window(WindowType::Sine, 1.0, 1024, true, &mut sine_long_win);
- generate_window(WindowType::Sine, 1.0, 128, true, &mut sine_short_win);
- Self {
- kbd_long_win, kbd_short_win,
- sine_long_win, sine_short_win,
- imdct_long: IMDCT::new(1024 * 2, true),
- imdct_short: IMDCT::new(128 * 2, true),
- tmp: [0.0; 2048], ew_buf: [0.0; 1152],
- }
- }
- #[allow(clippy::cognitive_complexity)]
- fn synth(&mut self, coeffs: &[f32; 1024], delay: &mut [f32; 1024], seq: u8, window_shape: bool, prev_window_shape: bool, dst: &mut [f32]) {
- let long_win = if window_shape { &self.kbd_long_win } else { &self.sine_long_win };
- let short_win = if window_shape { &self.kbd_short_win } else { &self.sine_short_win };
- let left_long_win = if prev_window_shape { &self.kbd_long_win } else { &self.sine_long_win };
- let left_short_win = if prev_window_shape { &self.kbd_short_win } else { &self.sine_short_win };
- if seq != EIGHT_SHORT_SEQUENCE {
- self.imdct_long.imdct(coeffs, &mut self.tmp);
- } else {
- for (ain, aout) in coeffs.chunks(128).zip(self.tmp.chunks_mut(256)) {
- self.imdct_short.imdct(ain, aout);
- }
- self.ew_buf = [0.0; 1152];
- for (w, src) in self.tmp.chunks(256).enumerate() {
- if w > 0 {
- for i in 0..128 {
- self.ew_buf[w * 128 + i] += src[i] * short_win[i];
- }
- } else { // to be left-windowed
- for i in 0..128 {
- self.ew_buf[i] = src[i];
- }
- }
- for i in 0..128 {
- self.ew_buf[w * 128 + i + 128] += src[i + 128] * short_win[127 - i];
- }
- }
- }
- if seq == ONLY_LONG_SEQUENCE { // should be the most common case
- for i in 0..1024 {
- dst[i] = delay[i] + self.tmp[i] * left_long_win[i];
- delay[i] = self.tmp[i + 1024] * long_win[1023 - i];
- }
- return;
- }
- // output new data
- match seq {
- ONLY_LONG_SEQUENCE | LONG_START_SEQUENCE => {
- for i in 0..1024 {
- dst[i] = self.tmp[i] * left_long_win[i] + delay[i];
- }
- },
- EIGHT_SHORT_SEQUENCE => {
- for i in 0..SHORT_WIN_POINT0 {
- dst[i] = delay[i];
- }
- for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 {
- let j = i - SHORT_WIN_POINT0;
- dst[i] = delay[i] + self.ew_buf[j] * left_short_win[j];
- }
- for i in SHORT_WIN_POINT1..1024 {
- let j = i - SHORT_WIN_POINT0;
- dst[i] = self.ew_buf[j];
- }
- },
- LONG_STOP_SEQUENCE => {
- for i in 0..SHORT_WIN_POINT0 {
- dst[i] = delay[i];
- }
- for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 {
- dst[i] = delay[i] + self.tmp[i] * left_short_win[i - SHORT_WIN_POINT0];
- }
- for i in SHORT_WIN_POINT1..1024 {
- dst[i] = self.tmp[i];
- }
- },
- _ => unreachable!(""),
- };
- // save delay
- match seq {
- ONLY_LONG_SEQUENCE | LONG_STOP_SEQUENCE => {
- for i in 0..1024 {
- delay[i] = self.tmp[i + 1024] * long_win[1023 - i];
- }
- },
- EIGHT_SHORT_SEQUENCE => {
- for i in 0..SHORT_WIN_POINT1 { // last part is already windowed
- delay[i] = self.ew_buf[i + 512+64];
- }
- for i in SHORT_WIN_POINT1..1024 {
- delay[i] = 0.0;
- }
- },
- LONG_START_SEQUENCE => {
- for i in 0..SHORT_WIN_POINT0 {
- delay[i] = self.tmp[i + 1024];
- }
- for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 {
- delay[i] = self.tmp[i + 1024] * short_win[127 - (i - SHORT_WIN_POINT0)];
- }
- for i in SHORT_WIN_POINT1..1024 {
- delay[i] = 0.0;
- }
- },
- _ => unreachable!(""),
- };
- }
-}
-
-struct AACDecoder {
- info: NACodecInfoRef,
- chmap: NAChannelMap,
- m4ainfo: M4AInfo,
- pairs: Vec<ChannelPair>,
- codebooks: Codebooks,
- dsp: DSP,
- sbinfo: GASubbandInfo,
-}
-
-impl AACDecoder {
- fn new() -> Self {
- AACDecoder {
- info: NACodecInfo::new_dummy(),
- chmap: NAChannelMap::new(),
- m4ainfo: M4AInfo::new(),
- pairs: Vec::new(),
- codebooks: Codebooks::new(),
- dsp: DSP::new(),
- sbinfo: AAC_SUBBAND_INFO[0],
- }
- }
- fn set_pair(&mut self, pair_no: usize, channel: usize, pair: bool) -> DecoderResult<()> {
- if self.pairs.len() <= pair_no {
- self.pairs.push(ChannelPair::new(pair, channel, self.sbinfo));
- } else {
- validate!(self.pairs[pair_no].channel == channel);
- validate!(self.pairs[pair_no].pair == pair);
- }
- validate!(if pair { channel + 1 } else { channel } < self.m4ainfo.channels);
- Ok(())
- }
- fn decode_ga(&mut self, br: &mut BitReader, abuf: &mut NABufferType) -> DecoderResult<()> {
- let mut cur_pair = 0;
- let mut cur_ch = 0;
- while br.left() > 3 {
- let id = br.read(3)?;
- match id {
- 0 => { // ID_SCE
- let _tag = br.read(4)?;
- self.set_pair(cur_pair, cur_ch, false)?;
- self.pairs[cur_pair].decode_ga_sce(br, &self.codebooks, self.m4ainfo.otype)?;
- cur_pair += 1;
- cur_ch += 1;
- },
- 1 => { // ID_CPE
- let _tag = br.read(4)?;
- self.set_pair(cur_pair, cur_ch, true)?;
- self.pairs[cur_pair].decode_ga_cpe(br, &self.codebooks, self.m4ainfo.otype)?;
- cur_pair += 1;
- cur_ch += 2;
- },
- 2 => { // ID_CCE
- unimplemented!("coupling channel element");
- },
- 3 => { // ID_LFE
- let _tag = br.read(4)?;
- self.set_pair(cur_pair, cur_ch, false)?;
- self.pairs[cur_pair].decode_ga_sce(br, &self.codebooks, self.m4ainfo.otype)?;
- cur_pair += 1;
- cur_ch += 1;
- },
- 4 => { // ID_DSE
- let _id = br.read(4)?;
- let align = br.read_bool()?;
- let mut count = br.read(8)? as u32;
- if count == 255 { count += br.read(8)? as u32; }
- if align { br.align(); }
- br.skip(count * 8)?; // no SBR payload or such
- },
- 5 => { // ID_PCE
- unimplemented!("program config");
- },
- 6 => { // ID_FIL
- let mut count = br.read(4)? as usize;
- if count == 15 {
- count += br.read(8)? as usize;
- count -= 1;
- }
- for _ in 0..count {
- // ext payload
- br.skip(8)?;
- }
- },
- 7 => { // ID_TERM
- break;
- },
- _ => { unreachable!(); },
- };
- }
- let srate_idx = GASubbandInfo::find_idx(self.m4ainfo.srate);
- for pair in 0..cur_pair {
- self.pairs[pair].synth_audio(&mut self.dsp, abuf, srate_idx);
- }
- Ok(())
- }
-}
-
-impl NADecoder for AACDecoder {
- fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
- if let NACodecTypeInfo::Audio(_) = info.get_properties() {
- let edata = info.get_extradata().unwrap();
- validate!(edata.len() >= 2);
-
-//print!("edata:"); for s in edata.iter() { print!(" {:02X}", *s);}println!("");
- if (edata.len() > 12) && (&edata[4..8] == b"esds") {
- let mut mr = MemoryReader::new_read(edata.as_slice());
- let mut br = ByteReader::new(&mut mr);
- let esds_size = br.read_u32be()? as usize;
- validate!(esds_size <= edata.len());
- br.read_skip(8)?;
- let mut info_start = 0;
- let mut info_size = 0;
- while br.tell() < (esds_size as u64) {
- let tag = br.read_byte()?;
- let mut size = 0;
- loop {
- let b = br.read_byte()?;
- size = (size << 7) | u64::from(b & 0x7F);
- validate!(br.tell() + size <= (esds_size as u64));
- if (b & 0x80) == 0 {
- break;
- }
- }
- match tag {
- 3 => {
- br.read_u16be()?;
- let flags = br.read_byte()?;
- if (flags & 0x80) != 0 {
- br.read_u16be()?;
- }
- if (flags & 0x40) != 0 {
- let len = br.read_byte()?;
- br.read_skip(len as usize)?;
- }
- if (flags & 0x20) != 0 {
- br.read_u16be()?;
- }
- },
- 4 => {
- let _otype = br.read_byte()?;
- let _stype = br.read_byte()?;
- let _flags = br.read_u24be()?;
- let _max_br = br.read_u32be()?;
- let _min_br = br.read_u32be()?;
- },
- 5 => {
- info_start = br.tell() as usize;
- info_size = size as usize;
- break;
- },
- _ => br.read_skip(size as usize)?,
- }
- }
- validate!(info_start > 0 && info_size > 0);
- self.m4ainfo.read(&edata[info_start..][..info_size])?;
- } else {
- self.m4ainfo.read(&edata)?;
- }
-
- //println!("{}", self.m4ainfo);
- if (self.m4ainfo.otype != M4AType::LC) || (self.m4ainfo.channels > 2) || (self.m4ainfo.samples != 1024) {
- return Err(DecoderError::NotImplemented);
- }
- self.sbinfo = GASubbandInfo::find(self.m4ainfo.srate);
-
- let ainfo = NAAudioInfo::new(self.m4ainfo.srate, self.m4ainfo.channels as u8,
- SND_F32P_FORMAT, self.m4ainfo.samples);
- self.info = info.replace_info(NACodecTypeInfo::Audio(ainfo));
-
- if self.m4ainfo.channels >= DEFAULT_CHANNEL_MAP.len() {
- return Err(DecoderError::NotImplemented);
- }
- let chmap_str = DEFAULT_CHANNEL_MAP[self.m4ainfo.channels];
- if chmap_str.is_empty() { return Err(DecoderError::NotImplemented); }
- self.chmap = NAChannelMap::from_str(chmap_str).unwrap();
-
- Ok(())
- } else {
- Err(DecoderError::InvalidData)
- }
- }
- fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
- let info = pkt.get_stream().get_info();
- validate!(info.get_properties().is_audio());
- let pktbuf = pkt.get_buffer();
-
- let ainfo = self.info.get_properties().get_audio_info().unwrap();
- let mut abuf = alloc_audio_buffer(ainfo, self.m4ainfo.samples, self.chmap.clone())?;
-
- let mut br = BitReader::new(&pktbuf, BitReaderMode::BE);
- match self.m4ainfo.otype {
- M4AType::LC => {
- self.decode_ga(&mut br, &mut abuf)?;
- },
- _ => { unimplemented!(""); }
- }
-
- let mut frm = NAFrame::new_from_pkt(pkt, self.info.replace_info(NACodecTypeInfo::Audio(ainfo)), abuf);
- frm.set_keyframe(true);
- Ok(frm.into_ref())
- }
- fn flush(&mut self) {
- for pair in self.pairs.iter_mut() {
- pair.ics[0].delay = [0.0; 1024];
- pair.ics[1].delay = [0.0; 1024];
- }
- }
-}
-
-impl NAOptionHandler for AACDecoder {
- fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
- fn set_options(&mut self, _options: &[NAOption]) { }
- fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
-}
-
-pub fn get_decoder() -> Box<dyn NADecoder + Send> {
- Box::new(AACDecoder::new())
-}
-
-#[cfg(test)]
-mod test {
- use nihav_core::codecs::RegisteredDecoders;
- use nihav_core::demuxers::RegisteredDemuxers;
- use nihav_codec_support::test::dec_video::test_decode_audio;
- use crate::mpeg_register_all_decoders;
- use nihav_realmedia::realmedia_register_all_demuxers;
- #[test]
- fn test_aac() {
- let mut dmx_reg = RegisteredDemuxers::new();
- realmedia_register_all_demuxers(&mut dmx_reg);
- let mut dec_reg = RegisteredDecoders::new();
- mpeg_register_all_decoders(&mut dec_reg);
-
-// let file = "assets/RV/rv40_weighted_mc.rmvb";
- let file = "assets/RV/rv40_weighted_mc_2.rmvb";
- test_decode_audio("realmedia", file, Some(12000), None/*Some("aac")*/, &dmx_reg, &dec_reg);
- }
-}
-
-const AAC_SCF_CODEBOOK_BITS: &[u8] = &[
- 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
- 19, 19, 19, 18, 19, 18, 17, 17, 16, 17, 16, 16, 16, 16, 15, 15,
- 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 12, 11, 12, 11, 10, 10,
- 10, 9, 9, 8, 8, 8, 7, 6, 6, 5, 4, 3, 1, 4, 4, 5,
- 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 10, 11, 11, 11, 11, 12,
- 12, 13, 13, 13, 14, 14, 16, 15, 16, 15, 18, 19, 19, 19, 19, 19,
- 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
- 19, 19, 19, 19, 19, 19, 19, 19, 19
-];
-
-const AAC_SCF_CODEBOOK_CODES: &[u32] = &[
- 0x3FFE8, 0x3FFE6, 0x3FFE7, 0x3FFE5, 0x7FFF5, 0x7FFF1, 0x7FFED, 0x7FFF6,
- 0x7FFEE, 0x7FFEF, 0x7FFF0, 0x7FFFC, 0x7FFFD, 0x7FFFF, 0x7FFFE, 0x7FFF7,
- 0x7FFF8, 0x7FFFB, 0x7FFF9, 0x3FFE4, 0x7FFFA, 0x3FFE3, 0x1FFEF, 0x1FFF0,
- 0x0FFF5, 0x1FFEE, 0x0FFF2, 0x0FFF3, 0x0FFF4, 0x0FFF1, 0x07FF6, 0x07FF7,
- 0x03FF9, 0x03FF5, 0x03FF7, 0x03FF3, 0x03FF6, 0x03FF2, 0x01FF7, 0x01FF5,
- 0x00FF9, 0x00FF7, 0x00FF6, 0x007F9, 0x00FF4, 0x007F8, 0x003F9, 0x003F7,
- 0x003F5, 0x001F8, 0x001F7, 0x000FA, 0x000F8, 0x000F6, 0x00079, 0x0003A,
- 0x00038, 0x0001A, 0x0000B, 0x00004, 0x00000, 0x0000A, 0x0000C, 0x0001B,
- 0x00039, 0x0003B, 0x00078, 0x0007A, 0x000F7, 0x000F9, 0x001F6, 0x001F9,
- 0x003F4, 0x003F6, 0x003F8, 0x007F5, 0x007F4, 0x007F6, 0x007F7, 0x00FF5,
- 0x00FF8, 0x01FF4, 0x01FF6, 0x01FF8, 0x03FF8, 0x03FF4, 0x0FFF0, 0x07FF4,
- 0x0FFF6, 0x07FF5, 0x3FFE2, 0x7FFD9, 0x7FFDA, 0x7FFDB, 0x7FFDC, 0x7FFDD,
- 0x7FFDE, 0x7FFD8, 0x7FFD2, 0x7FFD3, 0x7FFD4, 0x7FFD5, 0x7FFD6, 0x7FFF2,
- 0x7FFDF, 0x7FFE7, 0x7FFE8, 0x7FFE9, 0x7FFEA, 0x7FFEB, 0x7FFE6, 0x7FFE0,
- 0x7FFE1, 0x7FFE2, 0x7FFE3, 0x7FFE4, 0x7FFE5, 0x7FFD7, 0x7FFEC, 0x7FFF4,
- 0x7FFF3
-];
-
-const AAC_SPEC_CB1_BITS: &[u8] = &[
- 11, 9, 11, 10, 7, 10, 11, 9, 11, 10, 7, 10, 7, 5, 7, 9,
- 7, 10, 11, 9, 11, 9, 7, 9, 11, 9, 11, 9, 7, 9, 7, 5,
- 7, 9, 7, 9, 7, 5, 7, 5, 1, 5, 7, 5, 7, 9, 7, 9,
- 7, 5, 7, 9, 7, 9, 11, 9, 11, 9, 7, 9, 11, 9, 11, 10,
- 7, 9, 7, 5, 7, 9, 7, 10, 11, 9, 11, 10, 7, 9, 11, 9,
- 11
-];
-const AAC_SPEC_CB1_CODES: &[u16] = &[
- 0x7f8, 0x1f1, 0x7fd, 0x3f5, 0x068, 0x3f0, 0x7f7, 0x1ec,
- 0x7f5, 0x3f1, 0x072, 0x3f4, 0x074, 0x011, 0x076, 0x1eb,
- 0x06c, 0x3f6, 0x7fc, 0x1e1, 0x7f1, 0x1f0, 0x061, 0x1f6,
- 0x7f2, 0x1ea, 0x7fb, 0x1f2, 0x069, 0x1ed, 0x077, 0x017,
- 0x06f, 0x1e6, 0x064, 0x1e5, 0x067, 0x015, 0x062, 0x012,
- 0x000, 0x014, 0x065, 0x016, 0x06d, 0x1e9, 0x063, 0x1e4,
- 0x06b, 0x013, 0x071, 0x1e3, 0x070, 0x1f3, 0x7fe, 0x1e7,
- 0x7f3, 0x1ef, 0x060, 0x1ee, 0x7f0, 0x1e2, 0x7fa, 0x3f3,
- 0x06a, 0x1e8, 0x075, 0x010, 0x073, 0x1f4, 0x06e, 0x3f7,
- 0x7f6, 0x1e0, 0x7f9, 0x3f2, 0x066, 0x1f5, 0x7ff, 0x1f7,
- 0x7f4
-];
-const AAC_SPEC_CB2_BITS: &[u8] = &[
- 9, 7, 9, 8, 6, 8, 9, 8, 9, 8, 6, 7, 6, 5, 6, 7,
- 6, 8, 9, 7, 8, 8, 6, 8, 9, 7, 9, 8, 6, 7, 6, 5,
- 6, 7, 6, 8, 6, 5, 6, 5, 3, 5, 6, 5, 6, 8, 6, 7,
- 6, 5, 6, 8, 6, 8, 9, 7, 9, 8, 6, 8, 8, 7, 9, 8,
- 6, 7, 6, 4, 6, 8, 6, 7, 9, 7, 9, 7, 6, 8, 9, 7,
- 9
-];
-const AAC_SPEC_CB2_CODES: &[u16] = &[
- 0x1f3, 0x06f, 0x1fd, 0x0eb, 0x023, 0x0ea, 0x1f7, 0x0e8,
- 0x1fa, 0x0f2, 0x02d, 0x070, 0x020, 0x006, 0x02b, 0x06e,
- 0x028, 0x0e9, 0x1f9, 0x066, 0x0f8, 0x0e7, 0x01b, 0x0f1,
- 0x1f4, 0x06b, 0x1f5, 0x0ec, 0x02a, 0x06c, 0x02c, 0x00a,
- 0x027, 0x067, 0x01a, 0x0f5, 0x024, 0x008, 0x01f, 0x009,
- 0x000, 0x007, 0x01d, 0x00b, 0x030, 0x0ef, 0x01c, 0x064,
- 0x01e, 0x00c, 0x029, 0x0f3, 0x02f, 0x0f0, 0x1fc, 0x071,
- 0x1f2, 0x0f4, 0x021, 0x0e6, 0x0f7, 0x068, 0x1f8, 0x0ee,
- 0x022, 0x065, 0x031, 0x002, 0x026, 0x0ed, 0x025, 0x06a,
- 0x1fb, 0x072, 0x1fe, 0x069, 0x02e, 0x0f6, 0x1ff, 0x06d,
- 0x1f6
-];
-const AAC_SPEC_CB3_BITS: &[u8] = &[
- 1, 4, 8, 4, 5, 8, 9, 9, 10, 4, 6, 9, 6, 6, 9, 9,
- 9, 10, 9, 10, 13, 9, 9, 11, 11, 10, 12, 4, 6, 10, 6, 7,
- 10, 10, 10, 12, 5, 7, 11, 6, 7, 10, 9, 9, 11, 9, 10, 13,
- 8, 9, 12, 10, 11, 12, 8, 10, 15, 9, 11, 15, 13, 14, 16, 8,
- 10, 14, 9, 10, 14, 12, 12, 15, 11, 12, 16, 10, 11, 15, 12, 12,
- 15
-];
-const AAC_SPEC_CB3_CODES: &[u16] = &[
- 0x0000, 0x0009, 0x00ef, 0x000b, 0x0019, 0x00f0, 0x01eb, 0x01e6,
- 0x03f2, 0x000a, 0x0035, 0x01ef, 0x0034, 0x0037, 0x01e9, 0x01ed,
- 0x01e7, 0x03f3, 0x01ee, 0x03ed, 0x1ffa, 0x01ec, 0x01f2, 0x07f9,
- 0x07f8, 0x03f8, 0x0ff8, 0x0008, 0x0038, 0x03f6, 0x0036, 0x0075,
- 0x03f1, 0x03eb, 0x03ec, 0x0ff4, 0x0018, 0x0076, 0x07f4, 0x0039,
- 0x0074, 0x03ef, 0x01f3, 0x01f4, 0x07f6, 0x01e8, 0x03ea, 0x1ffc,
- 0x00f2, 0x01f1, 0x0ffb, 0x03f5, 0x07f3, 0x0ffc, 0x00ee, 0x03f7,
- 0x7ffe, 0x01f0, 0x07f5, 0x7ffd, 0x1ffb, 0x3ffa, 0xffff, 0x00f1,
- 0x03f0, 0x3ffc, 0x01ea, 0x03ee, 0x3ffb, 0x0ff6, 0x0ffa, 0x7ffc,
- 0x07f2, 0x0ff5, 0xfffe, 0x03f4, 0x07f7, 0x7ffb, 0x0ff7, 0x0ff9,
- 0x7ffa
-];
-const AAC_SPEC_CB4_BITS: &[u8] = &[
- 4, 5, 8, 5, 4, 8, 9, 8, 11, 5, 5, 8, 5, 4, 8, 8,
- 7, 10, 9, 8, 11, 8, 8, 10, 11, 10, 11, 4, 5, 8, 4, 4,
- 8, 8, 8, 10, 4, 4, 8, 4, 4, 7, 8, 7, 9, 8, 8, 10,
- 7, 7, 9, 10, 9, 10, 8, 8, 11, 8, 7, 10, 11, 10, 12, 8,
- 7, 10, 7, 7, 9, 10, 9, 11, 11, 10, 12, 10, 9, 11, 11, 10,
- 11
-];
-const AAC_SPEC_CB4_CODES: &[u16] = &[
- 0x007, 0x016, 0x0f6, 0x018, 0x008, 0x0ef, 0x1ef, 0x0f3,
- 0x7f8, 0x019, 0x017, 0x0ed, 0x015, 0x001, 0x0e2, 0x0f0,
- 0x070, 0x3f0, 0x1ee, 0x0f1, 0x7fa, 0x0ee, 0x0e4, 0x3f2,
- 0x7f6, 0x3ef, 0x7fd, 0x005, 0x014, 0x0f2, 0x009, 0x004,
- 0x0e5, 0x0f4, 0x0e8, 0x3f4, 0x006, 0x002, 0x0e7, 0x003,
- 0x000, 0x06b, 0x0e3, 0x069, 0x1f3, 0x0eb, 0x0e6, 0x3f6,
- 0x06e, 0x06a, 0x1f4, 0x3ec, 0x1f0, 0x3f9, 0x0f5, 0x0ec,
- 0x7fb, 0x0ea, 0x06f, 0x3f7, 0x7f9, 0x3f3, 0xfff, 0x0e9,
- 0x06d, 0x3f8, 0x06c, 0x068, 0x1f5, 0x3ee, 0x1f2, 0x7f4,
- 0x7f7, 0x3f1, 0xffe, 0x3ed, 0x1f1, 0x7f5, 0x7fe, 0x3f5,
- 0x7fc
-];
-const AAC_SPEC_CB5_BITS: &[u8] = &[
- 13, 12, 11, 11, 10, 11, 11, 12, 13, 12, 11, 10, 9, 8, 9, 10,
- 11, 12, 12, 10, 9, 8, 7, 8, 9, 10, 11, 11, 9, 8, 5, 4,
- 5, 8, 9, 11, 10, 8, 7, 4, 1, 4, 7, 8, 11, 11, 9, 8,
- 5, 4, 5, 8, 9, 11, 11, 10, 9, 8, 7, 8, 9, 10, 11, 12,
- 11, 10, 9, 8, 9, 10, 11, 12, 13, 12, 12, 11, 10, 10, 11, 12,
- 13
-];
-const AAC_SPEC_CB5_CODES: &[u16] = &[
- 0x1fff, 0x0ff7, 0x07f4, 0x07e8, 0x03f1, 0x07ee, 0x07f9, 0x0ff8,
- 0x1ffd, 0x0ffd, 0x07f1, 0x03e8, 0x01e8, 0x00f0, 0x01ec, 0x03ee,
- 0x07f2, 0x0ffa, 0x0ff4, 0x03ef, 0x01f2, 0x00e8, 0x0070, 0x00ec,
- 0x01f0, 0x03ea, 0x07f3, 0x07eb, 0x01eb, 0x00ea, 0x001a, 0x0008,
- 0x0019, 0x00ee, 0x01ef, 0x07ed, 0x03f0, 0x00f2, 0x0073, 0x000b,
- 0x0000, 0x000a, 0x0071, 0x00f3, 0x07e9, 0x07ef, 0x01ee, 0x00ef,
- 0x0018, 0x0009, 0x001b, 0x00eb, 0x01e9, 0x07ec, 0x07f6, 0x03eb,
- 0x01f3, 0x00ed, 0x0072, 0x00e9, 0x01f1, 0x03ed, 0x07f7, 0x0ff6,
- 0x07f0, 0x03e9, 0x01ed, 0x00f1, 0x01ea, 0x03ec, 0x07f8, 0x0ff9,
- 0x1ffc, 0x0ffc, 0x0ff5, 0x07ea, 0x03f3, 0x03f2, 0x07f5, 0x0ffb,
- 0x1ffe
-];
-const AAC_SPEC_CB6_BITS: &[u8] = &[
- 11, 10, 9, 9, 9, 9, 9, 10, 11, 10, 9, 8, 7, 7, 7, 8,
- 9, 10, 9, 8, 6, 6, 6, 6, 6, 8, 9, 9, 7, 6, 4, 4,
- 4, 6, 7, 9, 9, 7, 6, 4, 4, 4, 6, 7, 9, 9, 7, 6,
- 4, 4, 4, 6, 7, 9, 9, 8, 6, 6, 6, 6, 6, 8, 9, 10,
- 9, 8, 7, 7, 7, 7, 8, 10, 11, 10, 9, 9, 9, 9, 9, 10,
- 11
-];
-const AAC_SPEC_CB6_CODES: &[u16] = &[
- 0x7fe, 0x3fd, 0x1f1, 0x1eb, 0x1f4, 0x1ea, 0x1f0, 0x3fc,
- 0x7fd, 0x3f6, 0x1e5, 0x0ea, 0x06c, 0x071, 0x068, 0x0f0,
- 0x1e6, 0x3f7, 0x1f3, 0x0ef, 0x032, 0x027, 0x028, 0x026,
- 0x031, 0x0eb, 0x1f7, 0x1e8, 0x06f, 0x02e, 0x008, 0x004,
- 0x006, 0x029, 0x06b, 0x1ee, 0x1ef, 0x072, 0x02d, 0x002,
- 0x000, 0x003, 0x02f, 0x073, 0x1fa, 0x1e7, 0x06e, 0x02b,
- 0x007, 0x001, 0x005, 0x02c, 0x06d, 0x1ec, 0x1f9, 0x0ee,
- 0x030, 0x024, 0x02a, 0x025, 0x033, 0x0ec, 0x1f2, 0x3f8,
- 0x1e4, 0x0ed, 0x06a, 0x070, 0x069, 0x074, 0x0f1, 0x3fa,
- 0x7ff, 0x3f9, 0x1f6, 0x1ed, 0x1f8, 0x1e9, 0x1f5, 0x3fb,
- 0x7fc
-];
-const AAC_SPEC_CB7_BITS: &[u8] = &[
- 1, 3, 6, 7, 8, 9, 10, 11, 3, 4, 6, 7, 8, 8, 9, 9,
- 6, 6, 7, 8, 8, 9, 9, 10, 7, 7, 8, 8, 9, 9, 10, 10,
- 8, 8, 9, 9, 10, 10, 10, 11, 9, 8, 9, 9, 10, 10, 11, 11,
- 10, 9, 9, 10, 10, 11, 12, 12, 11, 10, 10, 10, 11, 11, 12, 12
-];
-const AAC_SPEC_CB7_CODES: &[u16] = &[
- 0x000, 0x005, 0x037, 0x074, 0x0f2, 0x1eb, 0x3ed, 0x7f7,
- 0x004, 0x00c, 0x035, 0x071, 0x0ec, 0x0ee, 0x1ee, 0x1f5,
- 0x036, 0x034, 0x072, 0x0ea, 0x0f1, 0x1e9, 0x1f3, 0x3f5,
- 0x073, 0x070, 0x0eb, 0x0f0, 0x1f1, 0x1f0, 0x3ec, 0x3fa,
- 0x0f3, 0x0ed, 0x1e8, 0x1ef, 0x3ef, 0x3f1, 0x3f9, 0x7fb,
- 0x1ed, 0x0ef, 0x1ea, 0x1f2, 0x3f3, 0x3f8, 0x7f9, 0x7fc,
- 0x3ee, 0x1ec, 0x1f4, 0x3f4, 0x3f7, 0x7f8, 0xffd, 0xffe,
- 0x7f6, 0x3f0, 0x3f2, 0x3f6, 0x7fa, 0x7fd, 0xffc, 0xfff
-];
-const AAC_SPEC_CB8_BITS: &[u8] = &[
- 5, 4, 5, 6, 7, 8, 9, 10, 4, 3, 4, 5, 6, 7, 7, 8,
- 5, 4, 4, 5, 6, 7, 7, 8, 6, 5, 5, 6, 6, 7, 8, 8,
- 7, 6, 6, 6, 7, 7, 8, 9, 8, 7, 6, 7, 7, 8, 8, 10,
- 9, 7, 7, 8, 8, 8, 9, 9, 10, 8, 8, 8, 9, 9, 9, 10
-];
-const AAC_SPEC_CB8_CODES: &[u16] = &[
- 0x00e, 0x005, 0x010, 0x030, 0x06f, 0x0f1, 0x1fa, 0x3fe,
- 0x003, 0x000, 0x004, 0x012, 0x02c, 0x06a, 0x075, 0x0f8,
- 0x00f, 0x002, 0x006, 0x014, 0x02e, 0x069, 0x072, 0x0f5,
- 0x02f, 0x011, 0x013, 0x02a, 0x032, 0x06c, 0x0ec, 0x0fa,
- 0x071, 0x02b, 0x02d, 0x031, 0x06d, 0x070, 0x0f2, 0x1f9,
- 0x0ef, 0x068, 0x033, 0x06b, 0x06e, 0x0ee, 0x0f9, 0x3fc,
- 0x1f8, 0x074, 0x073, 0x0ed, 0x0f0, 0x0f6, 0x1f6, 0x1fd,
- 0x3fd, 0x0f3, 0x0f4, 0x0f7, 0x1f7, 0x1fb, 0x1fc, 0x3ff
-];
-const AAC_SPEC_CB9_BITS: &[u8] = &[
- 1, 3, 6, 8, 9, 10, 10, 11, 11, 12, 12, 13, 13, 3, 4, 6,
- 7, 8, 8, 9, 10, 10, 10, 11, 12, 12, 6, 6, 7, 8, 8, 9,
- 10, 10, 10, 11, 12, 12, 12, 8, 7, 8, 9, 9, 10, 10, 11, 11,
- 11, 12, 12, 13, 9, 8, 9, 9, 10, 10, 11, 11, 11, 12, 12, 12,
- 13, 10, 9, 9, 10, 11, 11, 11, 12, 11, 12, 12, 13, 13, 11, 9,
- 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 11, 10, 10, 11, 11,
- 12, 12, 13, 13, 13, 13, 13, 13, 11, 10, 10, 11, 11, 11, 12, 12,
- 13, 13, 14, 13, 14, 11, 10, 11, 11, 12, 12, 12, 12, 13, 13, 14,
- 14, 14, 12, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 12,
- 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15, 13, 12, 12, 12,
- 13, 13, 13, 13, 14, 14, 14, 14, 15
-];
-const AAC_SPEC_CB9_CODES: &[u16] = &[
- 0x0000, 0x0005, 0x0037, 0x00e7, 0x01de, 0x03ce, 0x03d9, 0x07c8,
- 0x07cd, 0x0fc8, 0x0fdd, 0x1fe4, 0x1fec, 0x0004, 0x000c, 0x0035,
- 0x0072, 0x00ea, 0x00ed, 0x01e2, 0x03d1, 0x03d3, 0x03e0, 0x07d8,
- 0x0fcf, 0x0fd5, 0x0036, 0x0034, 0x0071, 0x00e8, 0x00ec, 0x01e1,
- 0x03cf, 0x03dd, 0x03db, 0x07d0, 0x0fc7, 0x0fd4, 0x0fe4, 0x00e6,
- 0x0070, 0x00e9, 0x01dd, 0x01e3, 0x03d2, 0x03dc, 0x07cc, 0x07ca,
- 0x07de, 0x0fd8, 0x0fea, 0x1fdb, 0x01df, 0x00eb, 0x01dc, 0x01e6,
- 0x03d5, 0x03de, 0x07cb, 0x07dd, 0x07dc, 0x0fcd, 0x0fe2, 0x0fe7,
- 0x1fe1, 0x03d0, 0x01e0, 0x01e4, 0x03d6, 0x07c5, 0x07d1, 0x07db,
- 0x0fd2, 0x07e0, 0x0fd9, 0x0feb, 0x1fe3, 0x1fe9, 0x07c4, 0x01e5,
- 0x03d7, 0x07c6, 0x07cf, 0x07da, 0x0fcb, 0x0fda, 0x0fe3, 0x0fe9,
- 0x1fe6, 0x1ff3, 0x1ff7, 0x07d3, 0x03d8, 0x03e1, 0x07d4, 0x07d9,
- 0x0fd3, 0x0fde, 0x1fdd, 0x1fd9, 0x1fe2, 0x1fea, 0x1ff1, 0x1ff6,
- 0x07d2, 0x03d4, 0x03da, 0x07c7, 0x07d7, 0x07e2, 0x0fce, 0x0fdb,
- 0x1fd8, 0x1fee, 0x3ff0, 0x1ff4, 0x3ff2, 0x07e1, 0x03df, 0x07c9,
- 0x07d6, 0x0fca, 0x0fd0, 0x0fe5, 0x0fe6, 0x1feb, 0x1fef, 0x3ff3,
- 0x3ff4, 0x3ff5, 0x0fe0, 0x07ce, 0x07d5, 0x0fc6, 0x0fd1, 0x0fe1,
- 0x1fe0, 0x1fe8, 0x1ff0, 0x3ff1, 0x3ff8, 0x3ff6, 0x7ffc, 0x0fe8,
- 0x07df, 0x0fc9, 0x0fd7, 0x0fdc, 0x1fdc, 0x1fdf, 0x1fed, 0x1ff5,
- 0x3ff9, 0x3ffb, 0x7ffd, 0x7ffe, 0x1fe7, 0x0fcc, 0x0fd6, 0x0fdf,
- 0x1fde, 0x1fda, 0x1fe5, 0x1ff2, 0x3ffa, 0x3ff7, 0x3ffc, 0x3ffd,
- 0x7fff
-];
-const AAC_SPEC_CB10_BITS: &[u8] = &[
- 6, 5, 6, 6, 7, 8, 9, 10, 10, 10, 11, 11, 12, 5, 4, 4,
- 5, 6, 7, 7, 8, 8, 9, 10, 10, 11, 6, 4, 5, 5, 6, 6,
- 7, 8, 8, 9, 9, 10, 10, 6, 5, 5, 5, 6, 7, 7, 8, 8,
- 9, 9, 10, 10, 7, 6, 6, 6, 6, 7, 7, 8, 8, 9, 9, 10,
- 10, 8, 7, 6, 7, 7, 7, 8, 8, 8, 9, 10, 10, 11, 9, 7,
- 7, 7, 7, 8, 8, 9, 9, 9, 10, 10, 11, 9, 8, 8, 8, 8,
- 8, 9, 9, 9, 10, 10, 11, 11, 9, 8, 8, 8, 8, 8, 9, 9,
- 10, 10, 10, 11, 11, 10, 9, 9, 9, 9, 9, 9, 10, 10, 10, 11,
- 11, 12, 10, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 11,
- 10, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 12, 11, 10, 10, 10,
- 10, 10, 10, 11, 11, 12, 12, 12, 12
-];
-const AAC_SPEC_CB10_CODES: &[u16] = &[
- 0x022, 0x008, 0x01d, 0x026, 0x05f, 0x0d3, 0x1cf, 0x3d0,
- 0x3d7, 0x3ed, 0x7f0, 0x7f6, 0xffd, 0x007, 0x000, 0x001,
- 0x009, 0x020, 0x054, 0x060, 0x0d5, 0x0dc, 0x1d4, 0x3cd,
- 0x3de, 0x7e7, 0x01c, 0x002, 0x006, 0x00c, 0x01e, 0x028,
- 0x05b, 0x0cd, 0x0d9, 0x1ce, 0x1dc, 0x3d9, 0x3f1, 0x025,
- 0x00b, 0x00a, 0x00d, 0x024, 0x057, 0x061, 0x0cc, 0x0dd,
- 0x1cc, 0x1de, 0x3d3, 0x3e7, 0x05d, 0x021, 0x01f, 0x023,
- 0x027, 0x059, 0x064, 0x0d8, 0x0df, 0x1d2, 0x1e2, 0x3dd,
- 0x3ee, 0x0d1, 0x055, 0x029, 0x056, 0x058, 0x062, 0x0ce,
- 0x0e0, 0x0e2, 0x1da, 0x3d4, 0x3e3, 0x7eb, 0x1c9, 0x05e,
- 0x05a, 0x05c, 0x063, 0x0ca, 0x0da, 0x1c7, 0x1ca, 0x1e0,
- 0x3db, 0x3e8, 0x7ec, 0x1e3, 0x0d2, 0x0cb, 0x0d0, 0x0d7,
- 0x0db, 0x1c6, 0x1d5, 0x1d8, 0x3ca, 0x3da, 0x7ea, 0x7f1,
- 0x1e1, 0x0d4, 0x0cf, 0x0d6, 0x0de, 0x0e1, 0x1d0, 0x1d6,
- 0x3d1, 0x3d5, 0x3f2, 0x7ee, 0x7fb, 0x3e9, 0x1cd, 0x1c8,
- 0x1cb, 0x1d1, 0x1d7, 0x1df, 0x3cf, 0x3e0, 0x3ef, 0x7e6,
- 0x7f8, 0xffa, 0x3eb, 0x1dd, 0x1d3, 0x1d9, 0x1db, 0x3d2,
- 0x3cc, 0x3dc, 0x3ea, 0x7ed, 0x7f3, 0x7f9, 0xff9, 0x7f2,
- 0x3ce, 0x1e4, 0x3cb, 0x3d8, 0x3d6, 0x3e2, 0x3e5, 0x7e8,
- 0x7f4, 0x7f5, 0x7f7, 0xffb, 0x7fa, 0x3ec, 0x3df, 0x3e1,
- 0x3e4, 0x3e6, 0x3f0, 0x7e9, 0x7ef, 0xff8, 0xffe, 0xffc,
- 0xfff
-];
-const AAC_SPEC_CB11_BITS: &[u8] = &[
- 4, 5, 6, 7, 8, 8, 9, 10, 10, 10, 11, 11, 12, 11, 12, 12,
- 10, 5, 4, 5, 6, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 10,
- 11, 8, 6, 5, 5, 6, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10,
- 10, 10, 8, 7, 6, 6, 6, 7, 7, 8, 8, 8, 9, 9, 9, 10,
- 10, 10, 10, 8, 8, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
- 10, 10, 10, 10, 8, 8, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9,
- 9, 10, 10, 10, 10, 8, 9, 8, 8, 8, 8, 8, 8, 8, 9, 9,
- 9, 10, 10, 10, 10, 10, 8, 9, 8, 8, 8, 8, 8, 8, 9, 9,
- 9, 10, 10, 10, 10, 10, 10, 8, 10, 9, 8, 8, 9, 9, 9, 9,
- 9, 10, 10, 10, 10, 10, 10, 11, 8, 10, 9, 9, 9, 9, 9, 9,
- 9, 10, 10, 10, 10, 10, 10, 11, 11, 8, 11, 9, 9, 9, 9, 9,
- 9, 10, 10, 10, 10, 10, 11, 10, 11, 11, 8, 11, 10, 9, 9, 10,
- 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 8, 11, 10, 10, 10,
- 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 9, 11, 10, 9,
- 9, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 9, 11, 10,
- 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 9, 12,
- 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 12, 12, 9,
- 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9,
- 5
-];
-const AAC_SPEC_CB11_CODES: &[u16] = &[
- 0x000, 0x006, 0x019, 0x03d, 0x09c, 0x0c6, 0x1a7, 0x390,
- 0x3c2, 0x3df, 0x7e6, 0x7f3, 0xffb, 0x7ec, 0xffa, 0xffe,
- 0x38e, 0x005, 0x001, 0x008, 0x014, 0x037, 0x042, 0x092,
- 0x0af, 0x191, 0x1a5, 0x1b5, 0x39e, 0x3c0, 0x3a2, 0x3cd,
- 0x7d6, 0x0ae, 0x017, 0x007, 0x009, 0x018, 0x039, 0x040,
- 0x08e, 0x0a3, 0x0b8, 0x199, 0x1ac, 0x1c1, 0x3b1, 0x396,
- 0x3be, 0x3ca, 0x09d, 0x03c, 0x015, 0x016, 0x01a, 0x03b,
- 0x044, 0x091, 0x0a5, 0x0be, 0x196, 0x1ae, 0x1b9, 0x3a1,
- 0x391, 0x3a5, 0x3d5, 0x094, 0x09a, 0x036, 0x038, 0x03a,
- 0x041, 0x08c, 0x09b, 0x0b0, 0x0c3, 0x19e, 0x1ab, 0x1bc,
- 0x39f, 0x38f, 0x3a9, 0x3cf, 0x093, 0x0bf, 0x03e, 0x03f,
- 0x043, 0x045, 0x09e, 0x0a7, 0x0b9, 0x194, 0x1a2, 0x1ba,
- 0x1c3, 0x3a6, 0x3a7, 0x3bb, 0x3d4, 0x09f, 0x1a0, 0x08f,
- 0x08d, 0x090, 0x098, 0x0a6, 0x0b6, 0x0c4, 0x19f, 0x1af,
- 0x1bf, 0x399, 0x3bf, 0x3b4, 0x3c9, 0x3e7, 0x0a8, 0x1b6,
- 0x0ab, 0x0a4, 0x0aa, 0x0b2, 0x0c2, 0x0c5, 0x198, 0x1a4,
- 0x1b8, 0x38c, 0x3a4, 0x3c4, 0x3c6, 0x3dd, 0x3e8, 0x0ad,
- 0x3af, 0x192, 0x0bd, 0x0bc, 0x18e, 0x197, 0x19a, 0x1a3,
- 0x1b1, 0x38d, 0x398, 0x3b7, 0x3d3, 0x3d1, 0x3db, 0x7dd,
- 0x0b4, 0x3de, 0x1a9, 0x19b, 0x19c, 0x1a1, 0x1aa, 0x1ad,
- 0x1b3, 0x38b, 0x3b2, 0x3b8, 0x3ce, 0x3e1, 0x3e0, 0x7d2,
- 0x7e5, 0x0b7, 0x7e3, 0x1bb, 0x1a8, 0x1a6, 0x1b0, 0x1b2,
- 0x1b7, 0x39b, 0x39a, 0x3ba, 0x3b5, 0x3d6, 0x7d7, 0x3e4,
- 0x7d8, 0x7ea, 0x0ba, 0x7e8, 0x3a0, 0x1bd, 0x1b4, 0x38a,
- 0x1c4, 0x392, 0x3aa, 0x3b0, 0x3bc, 0x3d7, 0x7d4, 0x7dc,
- 0x7db, 0x7d5, 0x7f0, 0x0c1, 0x7fb, 0x3c8, 0x3a3, 0x395,
- 0x39d, 0x3ac, 0x3ae, 0x3c5, 0x3d8, 0x3e2, 0x3e6, 0x7e4,
- 0x7e7, 0x7e0, 0x7e9, 0x7f7, 0x190, 0x7f2, 0x393, 0x1be,
- 0x1c0, 0x394, 0x397, 0x3ad, 0x3c3, 0x3c1, 0x3d2, 0x7da,
- 0x7d9, 0x7df, 0x7eb, 0x7f4, 0x7fa, 0x195, 0x7f8, 0x3bd,
- 0x39c, 0x3ab, 0x3a8, 0x3b3, 0x3b9, 0x3d0, 0x3e3, 0x3e5,
- 0x7e2, 0x7de, 0x7ed, 0x7f1, 0x7f9, 0x7fc, 0x193, 0xffd,
- 0x3dc, 0x3b6, 0x3c7, 0x3cc, 0x3cb, 0x3d9, 0x3da, 0x7d3,
- 0x7e1, 0x7ee, 0x7ef, 0x7f5, 0x7f6, 0xffc, 0xfff, 0x19d,
- 0x1c2, 0x0b5, 0x0a1, 0x096, 0x097, 0x095, 0x099, 0x0a0,
- 0x0a2, 0x0ac, 0x0a9, 0x0b1, 0x0b3, 0x0bb, 0x0c0, 0x18f,
- 0x004
-];
-
-const AAC_SPEC_BITS: [&[u8]; 11] = [
- AAC_SPEC_CB1_BITS, AAC_SPEC_CB2_BITS, AAC_SPEC_CB3_BITS, AAC_SPEC_CB4_BITS,
- AAC_SPEC_CB5_BITS, AAC_SPEC_CB6_BITS, AAC_SPEC_CB7_BITS, AAC_SPEC_CB8_BITS,
- AAC_SPEC_CB9_BITS, AAC_SPEC_CB10_BITS, AAC_SPEC_CB11_BITS
-];
-const AAC_SPEC_CODES: [&[u16]; 11] = [
- AAC_SPEC_CB1_CODES, AAC_SPEC_CB2_CODES, AAC_SPEC_CB3_CODES, AAC_SPEC_CB4_CODES,
- AAC_SPEC_CB5_CODES, AAC_SPEC_CB6_CODES, AAC_SPEC_CB7_CODES, AAC_SPEC_CB8_CODES,
- AAC_SPEC_CB9_CODES, AAC_SPEC_CB10_CODES, AAC_SPEC_CB11_CODES
-];
-const AAC_UNSIGNED_CODEBOOK: [bool; 11] = [
- false, false, true, true, false, false, true, true, true, true, true
-];
-const AAC_CODEBOOK_MODULO: [u16; 7] = [
- 9, 9, 8, 8, 13, 13, 17
-];
-
-const AAC_QUADS: [[i8; 4]; 81] = [
- [ 0, 0, 0, 0 ], [ 0, 0, 0, 1 ], [ 0, 0, 0, 2 ],
- [ 0, 0, 1, 0 ], [ 0, 0, 1, 1 ], [ 0, 0, 1, 2 ],
- [ 0, 0, 2, 0 ], [ 0, 0, 2, 1 ], [ 0, 0, 2, 2 ],
- [ 0, 1, 0, 0 ], [ 0, 1, 0, 1 ], [ 0, 1, 0, 2 ],
- [ 0, 1, 1, 0 ], [ 0, 1, 1, 1 ], [ 0, 1, 1, 2 ],
- [ 0, 1, 2, 0 ], [ 0, 1, 2, 1 ], [ 0, 1, 2, 2 ],
- [ 0, 2, 0, 0 ], [ 0, 2, 0, 1 ], [ 0, 2, 0, 2 ],
- [ 0, 2, 1, 0 ], [ 0, 2, 1, 1 ], [ 0, 2, 1, 2 ],
- [ 0, 2, 2, 0 ], [ 0, 2, 2, 1 ], [ 0, 2, 2, 2 ],
- [ 1, 0, 0, 0 ], [ 1, 0, 0, 1 ], [ 1, 0, 0, 2 ],
- [ 1, 0, 1, 0 ], [ 1, 0, 1, 1 ], [ 1, 0, 1, 2 ],
- [ 1, 0, 2, 0 ], [ 1, 0, 2, 1 ], [ 1, 0, 2, 2 ],
- [ 1, 1, 0, 0 ], [ 1, 1, 0, 1 ], [ 1, 1, 0, 2 ],
- [ 1, 1, 1, 0 ], [ 1, 1, 1, 1 ], [ 1, 1, 1, 2 ],
- [ 1, 1, 2, 0 ], [ 1, 1, 2, 1 ], [ 1, 1, 2, 2 ],
- [ 1, 2, 0, 0 ], [ 1, 2, 0, 1 ], [ 1, 2, 0, 2 ],
- [ 1, 2, 1, 0 ], [ 1, 2, 1, 1 ], [ 1, 2, 1, 2 ],
- [ 1, 2, 2, 0 ], [ 1, 2, 2, 1 ], [ 1, 2, 2, 2 ],
- [ 2, 0, 0, 0 ], [ 2, 0, 0, 1 ], [ 2, 0, 0, 2 ],
- [ 2, 0, 1, 0 ], [ 2, 0, 1, 1 ], [ 2, 0, 1, 2 ],
- [ 2, 0, 2, 0 ], [ 2, 0, 2, 1 ], [ 2, 0, 2, 2 ],
- [ 2, 1, 0, 0 ], [ 2, 1, 0, 1 ], [ 2, 1, 0, 2 ],
- [ 2, 1, 1, 0 ], [ 2, 1, 1, 1 ], [ 2, 1, 1, 2 ],
- [ 2, 1, 2, 0 ], [ 2, 1, 2, 1 ], [ 2, 1, 2, 2 ],
- [ 2, 2, 0, 0 ], [ 2, 2, 0, 1 ], [ 2, 2, 0, 2 ],
- [ 2, 2, 1, 0 ], [ 2, 2, 1, 1 ], [ 2, 2, 1, 2 ],
- [ 2, 2, 2, 0 ], [ 2, 2, 2, 1 ], [ 2, 2, 2, 2 ],
-];
-
-const DEFAULT_CHANNEL_MAP: [&str; 9] = [
- "",
- "C",
- "L,R",
- "C,L,R",
- "C,L,R,Cs",
- "C,L,R,Ls,Rs",
- "C,L,R,Ls,Rs,LFE",
- "",
- "C,L,R,Ls,Rs,Lss,Rss,LFE",
-];
-
-const SWB_OFFSET_48K_LONG: [usize; 49+1] = [
- 0, 4, 8, 12, 16, 20, 24, 28,
- 32, 36, 40, 48, 56, 64, 72, 80,
- 88, 96, 108, 120, 132, 144, 160, 176,
- 196, 216, 240, 264, 292, 320, 352, 384,
- 416, 448, 480, 512, 544, 576, 608, 640,
- 672, 704, 736, 768, 800, 832, 864, 896,
- 928, 1024
-];
-const SWB_OFFSET_48K_SHORT: [usize; 14+1] = [
- 0, 4, 8, 12, 16, 20, 28, 36, 44, 56, 68, 80, 96, 112, 128
-];
-const SWB_OFFSET_32K_LONG: [usize; 51+1] = [
- 0, 4, 8, 12, 16, 20, 24, 28,
- 32, 36, 40, 48, 56, 64, 72, 80,
- 88, 96, 108, 120, 132, 144, 160, 176,
- 196, 216, 240, 264, 292, 320, 352, 384,
- 416, 448, 480, 512, 544, 576, 608, 640,
- 672, 704, 736, 768, 800, 832, 864, 896,
- 928, 960, 992, 1024
-];
-const SWB_OFFSET_8K_LONG: [usize; 40+1] = [
- 0, 12, 24, 36, 48, 60, 72, 84,
- 96, 108, 120, 132, 144, 156, 172, 188,
- 204, 220, 236, 252, 268, 288, 308, 328,
- 348, 372, 396, 420, 448, 476, 508, 544,
- 580, 620, 664, 712, 764, 820, 880, 944,
- 1024
-];
-const SWB_OFFSET_8K_SHORT: [usize; 15+1] = [
- 0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 60, 72, 88, 108, 128
-];
-const SWB_OFFSET_16K_LONG: [usize; 43+1] = [
- 0, 8, 16, 24, 32, 40, 48, 56,
- 64, 72, 80, 88, 100, 112, 124, 136,
- 148, 160, 172, 184, 196, 212, 228, 244,
- 260, 280, 300, 320, 344, 368, 396, 424,
- 456, 492, 532, 572, 616, 664, 716, 772,
- 832, 896, 960, 1024
-];
-const SWB_OFFSET_16K_SHORT: [usize; 15+1] = [
- 0, 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 60, 72, 88, 108, 128
-];
-const SWB_OFFSET_24K_LONG: [usize; 47+1] = [
- 0, 4, 8, 12, 16, 20, 24, 28,
- 32, 36, 40, 44, 52, 60, 68, 76,
- 84, 92, 100, 108, 116, 124, 136, 148,
- 160, 172, 188, 204, 220, 240, 260, 284,
- 308, 336, 364, 396, 432, 468, 508, 552,
- 600, 652, 704, 768, 832, 896, 960, 1024
-];
-const SWB_OFFSET_24K_SHORT: [usize; 15+1] = [
- 0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 64, 76, 92, 108, 128
-];
-const SWB_OFFSET_64K_LONG: [usize; 47+1] = [
- 0, 4, 8, 12, 16, 20, 24, 28,
- 32, 36, 40, 44, 48, 52, 56, 64,
- 72, 80, 88, 100, 112, 124, 140, 156,
- 172, 192, 216, 240, 268, 304, 344, 384,
- 424, 464, 504, 544, 584, 624, 664, 704,
- 744, 784, 824, 864, 904, 944, 984, 1024
-];
-const SWB_OFFSET_64K_SHORT: [usize; 12+1] = [
- 0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
-];
-const SWB_OFFSET_96K_LONG: [usize; 41+1] = [
- 0, 4, 8, 12, 16, 20, 24, 28,
- 32, 36, 40, 44, 48, 52, 56, 64,
- 72, 80, 88, 96, 108, 120, 132, 144,
- 156, 172, 188, 212, 240, 276, 320, 384,
- 448, 512, 576, 640, 704, 768, 832, 896,
- 960, 1024
-];
-
-#[derive(Clone,Copy)]
-struct GASubbandInfo {
- min_srate: u32,
- long_bands: &'static [usize],
- short_bands: &'static [usize],
-}
-
-impl GASubbandInfo {
- fn find(srate: u32) -> GASubbandInfo {
- for sbi in AAC_SUBBAND_INFO.iter() {
- if srate >= sbi.min_srate {
- return *sbi;
- }
- }
- unreachable!("")
- }
- fn find_idx(srate: u32) -> usize {
- for (i, sbi) in AAC_SUBBAND_INFO.iter().enumerate() {
- if srate >= sbi.min_srate {
- return i;
- }
- }
- unreachable!("")
- }
-}
-
-const AAC_SUBBAND_INFO: [GASubbandInfo; 12] = [
- GASubbandInfo { min_srate: 92017, long_bands: &SWB_OFFSET_96K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //96K
- GASubbandInfo { min_srate: 75132, long_bands: &SWB_OFFSET_96K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //88.2K
- GASubbandInfo { min_srate: 55426, long_bands: &SWB_OFFSET_64K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //64K
- GASubbandInfo { min_srate: 46009, long_bands: &SWB_OFFSET_48K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //48K
- GASubbandInfo { min_srate: 37566, long_bands: &SWB_OFFSET_48K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //44.1K
- GASubbandInfo { min_srate: 27713, long_bands: &SWB_OFFSET_32K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //32K
- GASubbandInfo { min_srate: 23004, long_bands: &SWB_OFFSET_24K_LONG, short_bands: &SWB_OFFSET_24K_SHORT }, //24K
- GASubbandInfo { min_srate: 18783, long_bands: &SWB_OFFSET_24K_LONG, short_bands: &SWB_OFFSET_24K_SHORT }, //22.05K
- GASubbandInfo { min_srate: 13856, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //16K
- GASubbandInfo { min_srate: 11502, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //12K
- GASubbandInfo { min_srate: 9391, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //11.025K
- GASubbandInfo { min_srate: 0, long_bands: &SWB_OFFSET_8K_LONG, short_bands: &SWB_OFFSET_8K_SHORT }, //8K
-];
--- /dev/null
+use nihav_core::codecs::{DecoderResult, DecoderError};
+use nihav_core::io::bitreader::*;
+use nihav_core::io::codebook::*;
+use nihav_core::io::intcode::*;
+use std::mem;
+use std::ptr;
+use super::{INTENSITY_SCALE_MIN, MAX_WINDOWS, MAX_SFBS, GASubbandInfo, ICSInfo};
+
+pub const ZERO_HCB: u8 = 0;
+pub const FIRST_PAIR_HCB: u8 = 5;
+pub const ESC_HCB: u8 = 11;
+pub const RESERVED_HCB: u8 = 12;
+pub const NOISE_HCB: u8 = 13;
+pub const INTENSITY_HCB2: u8 = 14;
+pub const INTENSITY_HCB: u8 = 15;
+
+pub struct Codebooks {
+ pub scale_cb: Codebook<i8>,
+ pub spec_cb: [Codebook<u16>; 11],
+}
+
+fn scale_map(idx: usize) -> i8 { (idx as i8) - 60 }
+fn cb_map(idx: usize) -> u16 { idx as u16 }
+
+impl Codebooks {
+ pub fn new() -> Self {
+ let mut coderead = TableCodebookDescReader::new(AAC_SCF_CODEBOOK_CODES, AAC_SCF_CODEBOOK_BITS, scale_map);
+ let scale_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
+ let spec_cb = unsafe {
+ let mut uspec_cb: mem::MaybeUninit::<[Codebook<u16>; 11]> = mem::MaybeUninit::uninit();
+ for i in 0..AAC_SPEC_CODES.len() {
+ let mut coderead = TableCodebookDescReader::new(AAC_SPEC_CODES[i], AAC_SPEC_BITS[i], cb_map);
+ ptr::write(&mut (*uspec_cb.as_mut_ptr())[i], Codebook::new(&mut coderead, CodebookMode::MSB).unwrap());
+ }
+ uspec_cb.assume_init()
+ };
+ Self { scale_cb, spec_cb }
+ }
+}
+
+pub fn get_scale(scale: u8) -> f32 {
+ 2.0f32.powf(0.25 * (f32::from(scale) - 100.0 - 56.0))
+}
+pub fn iquant(val: f32) -> f32 {
+ if val < 0.0 {
+ -((-val).powf(4.0 / 3.0))
+ } else {
+ val.powf(4.0 / 3.0)
+ }
+}
+pub fn requant(val: f32, scale: f32) -> f32 {
+ if scale == 0.0 { return 0.0; }
+ let bval = val / scale;
+ if bval >= 0.0 {
+ val.powf(3.0 / 4.0)
+ } else {
+ -((-val).powf(3.0 / 4.0))
+ }
+}
+fn decode_quads(br: &mut BitReader, cb: &Codebook<u16>, unsigned: bool, scale: f32, dst: &mut [f32]) -> DecoderResult<()> {
+ for out in dst.chunks_mut(4) {
+ let cw = br.read_cb(cb)? as usize;
+ if unsigned {
+ for i in 0..4 {
+ let val = AAC_QUADS[cw][i];
+ if val != 0 {
+ if br.read_bool()? {
+ out[i] = iquant(-f32::from(val)) * scale;
+ } else {
+ out[i] = iquant( f32::from(val)) * scale;
+ }
+ }
+ }
+ } else {
+ for i in 0..4 {
+ out[i] = iquant(f32::from(AAC_QUADS[cw][i] - 1)) * scale;
+ }
+ }
+ }
+ Ok(())
+}
+fn decode_pairs(br: &mut BitReader, cb: &Codebook<u16>, unsigned: bool, escape: bool, modulo: u16, scale: f32, dst: &mut [f32]) -> DecoderResult<()> {
+ for out in dst.chunks_mut(2) {
+ let cw = br.read_cb(cb)?;
+ let mut x = (cw / modulo) as i16;
+ let mut y = (cw % modulo) as i16;
+ if unsigned {
+ if x != 0 && br.read_bool()? {
+ x = -x;
+ }
+ if y != 0 && br.read_bool()? {
+ y = -y;
+ }
+ } else {
+ x -= (modulo >> 1) as i16;
+ y -= (modulo >> 1) as i16;
+ }
+ if escape {
+ if (x == 16) || (x == -16) {
+ x += read_escape(br, x > 0)?;
+ }
+ if (y == 16) || (y == -16) {
+ y += read_escape(br, y > 0)?;
+ }
+ }
+ out[0] = iquant(f32::from(x)) * scale;
+ out[1] = iquant(f32::from(y)) * scale;
+ }
+ Ok(())
+}
+fn read_escape(br: &mut BitReader, sign: bool) -> DecoderResult<i16> {
+ let prefix = br.read_code(UintCodeType::UnaryOnes)? as u8;
+ validate!(prefix < 9);
+ let bits = br.read(prefix + 4)? as i16;
+ let bits = bits | (1 << (prefix + 4));
+ if sign {
+ Ok(bits)
+ } else {
+ Ok(-bits)
+ }
+}
+
+fn get_band_start(info: &ICSInfo, sbinfo: &GASubbandInfo, swb: usize) -> usize {
+ if info.long_win {
+ sbinfo.long_bands[swb]
+ } else {
+ sbinfo.short_bands[swb]
+ }
+}
+
+const NOISE_SCALE_MIN: i16 = -100;
+
+pub fn decode_scale_factor_data(br: &mut BitReader, scales: &mut [[u8; MAX_SFBS]; MAX_WINDOWS], global_gain: u8, info: &ICSInfo, sfb_cb: &[[u8; MAX_SFBS]; MAX_WINDOWS], codebooks: &Codebooks) -> DecoderResult<()> {
+ let mut noise_pcm_flag = true;
+ let mut scf_normal = i16::from(global_gain);
+ let mut scf_intensity = 0i16;
+ let mut scf_noise = 0i16;
+ for g in 0..info.window_groups {
+ for sfb in 0..info.max_sfb {
+ if sfb_cb[g][sfb] != ZERO_HCB {
+ if (sfb_cb[g][sfb] == INTENSITY_HCB) || (sfb_cb[g][sfb] == INTENSITY_HCB2) {
+ let diff = i16::from(br.read_cb(&codebooks.scale_cb)?);
+ scf_intensity += diff;
+ validate!((scf_intensity >= INTENSITY_SCALE_MIN) && (scf_intensity < INTENSITY_SCALE_MIN + 256));
+ scales[g][sfb] = (scf_intensity - INTENSITY_SCALE_MIN) as u8;
+ } else if sfb_cb[g][sfb] == NOISE_HCB {
+ if noise_pcm_flag {
+ noise_pcm_flag = false;
+ scf_noise = (br.read(9)? as i16) - 256 + i16::from(global_gain) - 90;
+ } else {
+ scf_noise += i16::from(br.read_cb(&codebooks.scale_cb)?);
+ }
+ validate!((scf_noise >= NOISE_SCALE_MIN) && (scf_noise < NOISE_SCALE_MIN + 256));
+ scales[g][sfb] = (scf_noise - NOISE_SCALE_MIN) as u8;
+ } else {
+ scf_normal += i16::from(br.read_cb(&codebooks.scale_cb)?);
+ validate!((scf_normal >= 0) && (scf_normal < 255));
+ scales[g][sfb] = scf_normal as u8;
+ }
+ }
+ }
+ }
+ Ok(())
+}
+
+pub fn decode_spectrum(br: &mut BitReader, coeffs: &mut [f32; 1024], scales: &[[u8; MAX_SFBS]; MAX_WINDOWS], info: &ICSInfo, sbinfo: &GASubbandInfo, sfb_cb: &[[u8; MAX_SFBS]; MAX_WINDOWS], codebooks: &Codebooks) -> DecoderResult<()> {
+ for g in 0..info.window_groups {
+ let cur_w = info.get_group_start(g);
+ let next_w = info.get_group_start(g + 1);
+ for sfb in 0..info.max_sfb {
+ let start = get_band_start(info, sbinfo, sfb);
+ let end = get_band_start(info, sbinfo, sfb + 1);
+ let cb_idx = sfb_cb[g][sfb];
+ for w in cur_w..next_w {
+ let dst = &mut coeffs[start + w*128..end + w*128];
+ match cb_idx {
+ ZERO_HCB => { /* zeroes */ },
+ NOISE_HCB => { /* noise */ },
+ INTENSITY_HCB | INTENSITY_HCB2 => { /* intensity */ },
+ _ => {
+ let unsigned = AAC_UNSIGNED_CODEBOOK[(cb_idx - 1) as usize];
+ let scale = get_scale(scales[g][sfb]);
+ let cb = &codebooks.spec_cb[(cb_idx - 1) as usize];
+ if cb_idx < FIRST_PAIR_HCB {
+ decode_quads(br, cb, unsigned, scale, dst)?;
+ } else {
+ decode_pairs(br, cb, unsigned, cb_idx == ESC_HCB,
+ AAC_CODEBOOK_MODULO[(cb_idx - FIRST_PAIR_HCB) as usize], scale, dst)?;
+ }
+ },
+ };
+ }
+ }
+ }
+ Ok(())
+}
+
+const AAC_SCF_CODEBOOK_BITS: &[u8] = &[
+ 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 18, 19, 18, 17, 17, 16, 17, 16, 16, 16, 16, 15, 15,
+ 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 12, 11, 12, 11, 10, 10,
+ 10, 9, 9, 8, 8, 8, 7, 6, 6, 5, 4, 3, 1, 4, 4, 5,
+ 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 10, 11, 11, 11, 11, 12,
+ 12, 13, 13, 13, 14, 14, 16, 15, 16, 15, 18, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19
+];
+
+const AAC_SCF_CODEBOOK_CODES: &[u32] = &[
+ 0x3FFE8, 0x3FFE6, 0x3FFE7, 0x3FFE5, 0x7FFF5, 0x7FFF1, 0x7FFED, 0x7FFF6,
+ 0x7FFEE, 0x7FFEF, 0x7FFF0, 0x7FFFC, 0x7FFFD, 0x7FFFF, 0x7FFFE, 0x7FFF7,
+ 0x7FFF8, 0x7FFFB, 0x7FFF9, 0x3FFE4, 0x7FFFA, 0x3FFE3, 0x1FFEF, 0x1FFF0,
+ 0x0FFF5, 0x1FFEE, 0x0FFF2, 0x0FFF3, 0x0FFF4, 0x0FFF1, 0x07FF6, 0x07FF7,
+ 0x03FF9, 0x03FF5, 0x03FF7, 0x03FF3, 0x03FF6, 0x03FF2, 0x01FF7, 0x01FF5,
+ 0x00FF9, 0x00FF7, 0x00FF6, 0x007F9, 0x00FF4, 0x007F8, 0x003F9, 0x003F7,
+ 0x003F5, 0x001F8, 0x001F7, 0x000FA, 0x000F8, 0x000F6, 0x00079, 0x0003A,
+ 0x00038, 0x0001A, 0x0000B, 0x00004, 0x00000, 0x0000A, 0x0000C, 0x0001B,
+ 0x00039, 0x0003B, 0x00078, 0x0007A, 0x000F7, 0x000F9, 0x001F6, 0x001F9,
+ 0x003F4, 0x003F6, 0x003F8, 0x007F5, 0x007F4, 0x007F6, 0x007F7, 0x00FF5,
+ 0x00FF8, 0x01FF4, 0x01FF6, 0x01FF8, 0x03FF8, 0x03FF4, 0x0FFF0, 0x07FF4,
+ 0x0FFF6, 0x07FF5, 0x3FFE2, 0x7FFD9, 0x7FFDA, 0x7FFDB, 0x7FFDC, 0x7FFDD,
+ 0x7FFDE, 0x7FFD8, 0x7FFD2, 0x7FFD3, 0x7FFD4, 0x7FFD5, 0x7FFD6, 0x7FFF2,
+ 0x7FFDF, 0x7FFE7, 0x7FFE8, 0x7FFE9, 0x7FFEA, 0x7FFEB, 0x7FFE6, 0x7FFE0,
+ 0x7FFE1, 0x7FFE2, 0x7FFE3, 0x7FFE4, 0x7FFE5, 0x7FFD7, 0x7FFEC, 0x7FFF4,
+ 0x7FFF3
+];
+
+const AAC_SPEC_CB1_BITS: &[u8] = &[
+ 11, 9, 11, 10, 7, 10, 11, 9, 11, 10, 7, 10, 7, 5, 7, 9,
+ 7, 10, 11, 9, 11, 9, 7, 9, 11, 9, 11, 9, 7, 9, 7, 5,
+ 7, 9, 7, 9, 7, 5, 7, 5, 1, 5, 7, 5, 7, 9, 7, 9,
+ 7, 5, 7, 9, 7, 9, 11, 9, 11, 9, 7, 9, 11, 9, 11, 10,
+ 7, 9, 7, 5, 7, 9, 7, 10, 11, 9, 11, 10, 7, 9, 11, 9,
+ 11
+];
+const AAC_SPEC_CB1_CODES: &[u16] = &[
+ 0x7f8, 0x1f1, 0x7fd, 0x3f5, 0x068, 0x3f0, 0x7f7, 0x1ec,
+ 0x7f5, 0x3f1, 0x072, 0x3f4, 0x074, 0x011, 0x076, 0x1eb,
+ 0x06c, 0x3f6, 0x7fc, 0x1e1, 0x7f1, 0x1f0, 0x061, 0x1f6,
+ 0x7f2, 0x1ea, 0x7fb, 0x1f2, 0x069, 0x1ed, 0x077, 0x017,
+ 0x06f, 0x1e6, 0x064, 0x1e5, 0x067, 0x015, 0x062, 0x012,
+ 0x000, 0x014, 0x065, 0x016, 0x06d, 0x1e9, 0x063, 0x1e4,
+ 0x06b, 0x013, 0x071, 0x1e3, 0x070, 0x1f3, 0x7fe, 0x1e7,
+ 0x7f3, 0x1ef, 0x060, 0x1ee, 0x7f0, 0x1e2, 0x7fa, 0x3f3,
+ 0x06a, 0x1e8, 0x075, 0x010, 0x073, 0x1f4, 0x06e, 0x3f7,
+ 0x7f6, 0x1e0, 0x7f9, 0x3f2, 0x066, 0x1f5, 0x7ff, 0x1f7,
+ 0x7f4
+];
+const AAC_SPEC_CB2_BITS: &[u8] = &[
+ 9, 7, 9, 8, 6, 8, 9, 8, 9, 8, 6, 7, 6, 5, 6, 7,
+ 6, 8, 9, 7, 8, 8, 6, 8, 9, 7, 9, 8, 6, 7, 6, 5,
+ 6, 7, 6, 8, 6, 5, 6, 5, 3, 5, 6, 5, 6, 8, 6, 7,
+ 6, 5, 6, 8, 6, 8, 9, 7, 9, 8, 6, 8, 8, 7, 9, 8,
+ 6, 7, 6, 4, 6, 8, 6, 7, 9, 7, 9, 7, 6, 8, 9, 7,
+ 9
+];
+const AAC_SPEC_CB2_CODES: &[u16] = &[
+ 0x1f3, 0x06f, 0x1fd, 0x0eb, 0x023, 0x0ea, 0x1f7, 0x0e8,
+ 0x1fa, 0x0f2, 0x02d, 0x070, 0x020, 0x006, 0x02b, 0x06e,
+ 0x028, 0x0e9, 0x1f9, 0x066, 0x0f8, 0x0e7, 0x01b, 0x0f1,
+ 0x1f4, 0x06b, 0x1f5, 0x0ec, 0x02a, 0x06c, 0x02c, 0x00a,
+ 0x027, 0x067, 0x01a, 0x0f5, 0x024, 0x008, 0x01f, 0x009,
+ 0x000, 0x007, 0x01d, 0x00b, 0x030, 0x0ef, 0x01c, 0x064,
+ 0x01e, 0x00c, 0x029, 0x0f3, 0x02f, 0x0f0, 0x1fc, 0x071,
+ 0x1f2, 0x0f4, 0x021, 0x0e6, 0x0f7, 0x068, 0x1f8, 0x0ee,
+ 0x022, 0x065, 0x031, 0x002, 0x026, 0x0ed, 0x025, 0x06a,
+ 0x1fb, 0x072, 0x1fe, 0x069, 0x02e, 0x0f6, 0x1ff, 0x06d,
+ 0x1f6
+];
+const AAC_SPEC_CB3_BITS: &[u8] = &[
+ 1, 4, 8, 4, 5, 8, 9, 9, 10, 4, 6, 9, 6, 6, 9, 9,
+ 9, 10, 9, 10, 13, 9, 9, 11, 11, 10, 12, 4, 6, 10, 6, 7,
+ 10, 10, 10, 12, 5, 7, 11, 6, 7, 10, 9, 9, 11, 9, 10, 13,
+ 8, 9, 12, 10, 11, 12, 8, 10, 15, 9, 11, 15, 13, 14, 16, 8,
+ 10, 14, 9, 10, 14, 12, 12, 15, 11, 12, 16, 10, 11, 15, 12, 12,
+ 15
+];
+const AAC_SPEC_CB3_CODES: &[u16] = &[
+ 0x0000, 0x0009, 0x00ef, 0x000b, 0x0019, 0x00f0, 0x01eb, 0x01e6,
+ 0x03f2, 0x000a, 0x0035, 0x01ef, 0x0034, 0x0037, 0x01e9, 0x01ed,
+ 0x01e7, 0x03f3, 0x01ee, 0x03ed, 0x1ffa, 0x01ec, 0x01f2, 0x07f9,
+ 0x07f8, 0x03f8, 0x0ff8, 0x0008, 0x0038, 0x03f6, 0x0036, 0x0075,
+ 0x03f1, 0x03eb, 0x03ec, 0x0ff4, 0x0018, 0x0076, 0x07f4, 0x0039,
+ 0x0074, 0x03ef, 0x01f3, 0x01f4, 0x07f6, 0x01e8, 0x03ea, 0x1ffc,
+ 0x00f2, 0x01f1, 0x0ffb, 0x03f5, 0x07f3, 0x0ffc, 0x00ee, 0x03f7,
+ 0x7ffe, 0x01f0, 0x07f5, 0x7ffd, 0x1ffb, 0x3ffa, 0xffff, 0x00f1,
+ 0x03f0, 0x3ffc, 0x01ea, 0x03ee, 0x3ffb, 0x0ff6, 0x0ffa, 0x7ffc,
+ 0x07f2, 0x0ff5, 0xfffe, 0x03f4, 0x07f7, 0x7ffb, 0x0ff7, 0x0ff9,
+ 0x7ffa
+];
+const AAC_SPEC_CB4_BITS: &[u8] = &[
+ 4, 5, 8, 5, 4, 8, 9, 8, 11, 5, 5, 8, 5, 4, 8, 8,
+ 7, 10, 9, 8, 11, 8, 8, 10, 11, 10, 11, 4, 5, 8, 4, 4,
+ 8, 8, 8, 10, 4, 4, 8, 4, 4, 7, 8, 7, 9, 8, 8, 10,
+ 7, 7, 9, 10, 9, 10, 8, 8, 11, 8, 7, 10, 11, 10, 12, 8,
+ 7, 10, 7, 7, 9, 10, 9, 11, 11, 10, 12, 10, 9, 11, 11, 10,
+ 11
+];
+const AAC_SPEC_CB4_CODES: &[u16] = &[
+ 0x007, 0x016, 0x0f6, 0x018, 0x008, 0x0ef, 0x1ef, 0x0f3,
+ 0x7f8, 0x019, 0x017, 0x0ed, 0x015, 0x001, 0x0e2, 0x0f0,
+ 0x070, 0x3f0, 0x1ee, 0x0f1, 0x7fa, 0x0ee, 0x0e4, 0x3f2,
+ 0x7f6, 0x3ef, 0x7fd, 0x005, 0x014, 0x0f2, 0x009, 0x004,
+ 0x0e5, 0x0f4, 0x0e8, 0x3f4, 0x006, 0x002, 0x0e7, 0x003,
+ 0x000, 0x06b, 0x0e3, 0x069, 0x1f3, 0x0eb, 0x0e6, 0x3f6,
+ 0x06e, 0x06a, 0x1f4, 0x3ec, 0x1f0, 0x3f9, 0x0f5, 0x0ec,
+ 0x7fb, 0x0ea, 0x06f, 0x3f7, 0x7f9, 0x3f3, 0xfff, 0x0e9,
+ 0x06d, 0x3f8, 0x06c, 0x068, 0x1f5, 0x3ee, 0x1f2, 0x7f4,
+ 0x7f7, 0x3f1, 0xffe, 0x3ed, 0x1f1, 0x7f5, 0x7fe, 0x3f5,
+ 0x7fc
+];
+const AAC_SPEC_CB5_BITS: &[u8] = &[
+ 13, 12, 11, 11, 10, 11, 11, 12, 13, 12, 11, 10, 9, 8, 9, 10,
+ 11, 12, 12, 10, 9, 8, 7, 8, 9, 10, 11, 11, 9, 8, 5, 4,
+ 5, 8, 9, 11, 10, 8, 7, 4, 1, 4, 7, 8, 11, 11, 9, 8,
+ 5, 4, 5, 8, 9, 11, 11, 10, 9, 8, 7, 8, 9, 10, 11, 12,
+ 11, 10, 9, 8, 9, 10, 11, 12, 13, 12, 12, 11, 10, 10, 11, 12,
+ 13
+];
+const AAC_SPEC_CB5_CODES: &[u16] = &[
+ 0x1fff, 0x0ff7, 0x07f4, 0x07e8, 0x03f1, 0x07ee, 0x07f9, 0x0ff8,
+ 0x1ffd, 0x0ffd, 0x07f1, 0x03e8, 0x01e8, 0x00f0, 0x01ec, 0x03ee,
+ 0x07f2, 0x0ffa, 0x0ff4, 0x03ef, 0x01f2, 0x00e8, 0x0070, 0x00ec,
+ 0x01f0, 0x03ea, 0x07f3, 0x07eb, 0x01eb, 0x00ea, 0x001a, 0x0008,
+ 0x0019, 0x00ee, 0x01ef, 0x07ed, 0x03f0, 0x00f2, 0x0073, 0x000b,
+ 0x0000, 0x000a, 0x0071, 0x00f3, 0x07e9, 0x07ef, 0x01ee, 0x00ef,
+ 0x0018, 0x0009, 0x001b, 0x00eb, 0x01e9, 0x07ec, 0x07f6, 0x03eb,
+ 0x01f3, 0x00ed, 0x0072, 0x00e9, 0x01f1, 0x03ed, 0x07f7, 0x0ff6,
+ 0x07f0, 0x03e9, 0x01ed, 0x00f1, 0x01ea, 0x03ec, 0x07f8, 0x0ff9,
+ 0x1ffc, 0x0ffc, 0x0ff5, 0x07ea, 0x03f3, 0x03f2, 0x07f5, 0x0ffb,
+ 0x1ffe
+];
+const AAC_SPEC_CB6_BITS: &[u8] = &[
+ 11, 10, 9, 9, 9, 9, 9, 10, 11, 10, 9, 8, 7, 7, 7, 8,
+ 9, 10, 9, 8, 6, 6, 6, 6, 6, 8, 9, 9, 7, 6, 4, 4,
+ 4, 6, 7, 9, 9, 7, 6, 4, 4, 4, 6, 7, 9, 9, 7, 6,
+ 4, 4, 4, 6, 7, 9, 9, 8, 6, 6, 6, 6, 6, 8, 9, 10,
+ 9, 8, 7, 7, 7, 7, 8, 10, 11, 10, 9, 9, 9, 9, 9, 10,
+ 11
+];
+const AAC_SPEC_CB6_CODES: &[u16] = &[
+ 0x7fe, 0x3fd, 0x1f1, 0x1eb, 0x1f4, 0x1ea, 0x1f0, 0x3fc,
+ 0x7fd, 0x3f6, 0x1e5, 0x0ea, 0x06c, 0x071, 0x068, 0x0f0,
+ 0x1e6, 0x3f7, 0x1f3, 0x0ef, 0x032, 0x027, 0x028, 0x026,
+ 0x031, 0x0eb, 0x1f7, 0x1e8, 0x06f, 0x02e, 0x008, 0x004,
+ 0x006, 0x029, 0x06b, 0x1ee, 0x1ef, 0x072, 0x02d, 0x002,
+ 0x000, 0x003, 0x02f, 0x073, 0x1fa, 0x1e7, 0x06e, 0x02b,
+ 0x007, 0x001, 0x005, 0x02c, 0x06d, 0x1ec, 0x1f9, 0x0ee,
+ 0x030, 0x024, 0x02a, 0x025, 0x033, 0x0ec, 0x1f2, 0x3f8,
+ 0x1e4, 0x0ed, 0x06a, 0x070, 0x069, 0x074, 0x0f1, 0x3fa,
+ 0x7ff, 0x3f9, 0x1f6, 0x1ed, 0x1f8, 0x1e9, 0x1f5, 0x3fb,
+ 0x7fc
+];
+const AAC_SPEC_CB7_BITS: &[u8] = &[
+ 1, 3, 6, 7, 8, 9, 10, 11, 3, 4, 6, 7, 8, 8, 9, 9,
+ 6, 6, 7, 8, 8, 9, 9, 10, 7, 7, 8, 8, 9, 9, 10, 10,
+ 8, 8, 9, 9, 10, 10, 10, 11, 9, 8, 9, 9, 10, 10, 11, 11,
+ 10, 9, 9, 10, 10, 11, 12, 12, 11, 10, 10, 10, 11, 11, 12, 12
+];
+const AAC_SPEC_CB7_CODES: &[u16] = &[
+ 0x000, 0x005, 0x037, 0x074, 0x0f2, 0x1eb, 0x3ed, 0x7f7,
+ 0x004, 0x00c, 0x035, 0x071, 0x0ec, 0x0ee, 0x1ee, 0x1f5,
+ 0x036, 0x034, 0x072, 0x0ea, 0x0f1, 0x1e9, 0x1f3, 0x3f5,
+ 0x073, 0x070, 0x0eb, 0x0f0, 0x1f1, 0x1f0, 0x3ec, 0x3fa,
+ 0x0f3, 0x0ed, 0x1e8, 0x1ef, 0x3ef, 0x3f1, 0x3f9, 0x7fb,
+ 0x1ed, 0x0ef, 0x1ea, 0x1f2, 0x3f3, 0x3f8, 0x7f9, 0x7fc,
+ 0x3ee, 0x1ec, 0x1f4, 0x3f4, 0x3f7, 0x7f8, 0xffd, 0xffe,
+ 0x7f6, 0x3f0, 0x3f2, 0x3f6, 0x7fa, 0x7fd, 0xffc, 0xfff
+];
+const AAC_SPEC_CB8_BITS: &[u8] = &[
+ 5, 4, 5, 6, 7, 8, 9, 10, 4, 3, 4, 5, 6, 7, 7, 8,
+ 5, 4, 4, 5, 6, 7, 7, 8, 6, 5, 5, 6, 6, 7, 8, 8,
+ 7, 6, 6, 6, 7, 7, 8, 9, 8, 7, 6, 7, 7, 8, 8, 10,
+ 9, 7, 7, 8, 8, 8, 9, 9, 10, 8, 8, 8, 9, 9, 9, 10
+];
+const AAC_SPEC_CB8_CODES: &[u16] = &[
+ 0x00e, 0x005, 0x010, 0x030, 0x06f, 0x0f1, 0x1fa, 0x3fe,
+ 0x003, 0x000, 0x004, 0x012, 0x02c, 0x06a, 0x075, 0x0f8,
+ 0x00f, 0x002, 0x006, 0x014, 0x02e, 0x069, 0x072, 0x0f5,
+ 0x02f, 0x011, 0x013, 0x02a, 0x032, 0x06c, 0x0ec, 0x0fa,
+ 0x071, 0x02b, 0x02d, 0x031, 0x06d, 0x070, 0x0f2, 0x1f9,
+ 0x0ef, 0x068, 0x033, 0x06b, 0x06e, 0x0ee, 0x0f9, 0x3fc,
+ 0x1f8, 0x074, 0x073, 0x0ed, 0x0f0, 0x0f6, 0x1f6, 0x1fd,
+ 0x3fd, 0x0f3, 0x0f4, 0x0f7, 0x1f7, 0x1fb, 0x1fc, 0x3ff
+];
+const AAC_SPEC_CB9_BITS: &[u8] = &[
+ 1, 3, 6, 8, 9, 10, 10, 11, 11, 12, 12, 13, 13, 3, 4, 6,
+ 7, 8, 8, 9, 10, 10, 10, 11, 12, 12, 6, 6, 7, 8, 8, 9,
+ 10, 10, 10, 11, 12, 12, 12, 8, 7, 8, 9, 9, 10, 10, 11, 11,
+ 11, 12, 12, 13, 9, 8, 9, 9, 10, 10, 11, 11, 11, 12, 12, 12,
+ 13, 10, 9, 9, 10, 11, 11, 11, 12, 11, 12, 12, 13, 13, 11, 9,
+ 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 11, 10, 10, 11, 11,
+ 12, 12, 13, 13, 13, 13, 13, 13, 11, 10, 10, 11, 11, 11, 12, 12,
+ 13, 13, 14, 13, 14, 11, 10, 11, 11, 12, 12, 12, 12, 13, 13, 14,
+ 14, 14, 12, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 12,
+ 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15, 13, 12, 12, 12,
+ 13, 13, 13, 13, 14, 14, 14, 14, 15
+];
+const AAC_SPEC_CB9_CODES: &[u16] = &[
+ 0x0000, 0x0005, 0x0037, 0x00e7, 0x01de, 0x03ce, 0x03d9, 0x07c8,
+ 0x07cd, 0x0fc8, 0x0fdd, 0x1fe4, 0x1fec, 0x0004, 0x000c, 0x0035,
+ 0x0072, 0x00ea, 0x00ed, 0x01e2, 0x03d1, 0x03d3, 0x03e0, 0x07d8,
+ 0x0fcf, 0x0fd5, 0x0036, 0x0034, 0x0071, 0x00e8, 0x00ec, 0x01e1,
+ 0x03cf, 0x03dd, 0x03db, 0x07d0, 0x0fc7, 0x0fd4, 0x0fe4, 0x00e6,
+ 0x0070, 0x00e9, 0x01dd, 0x01e3, 0x03d2, 0x03dc, 0x07cc, 0x07ca,
+ 0x07de, 0x0fd8, 0x0fea, 0x1fdb, 0x01df, 0x00eb, 0x01dc, 0x01e6,
+ 0x03d5, 0x03de, 0x07cb, 0x07dd, 0x07dc, 0x0fcd, 0x0fe2, 0x0fe7,
+ 0x1fe1, 0x03d0, 0x01e0, 0x01e4, 0x03d6, 0x07c5, 0x07d1, 0x07db,
+ 0x0fd2, 0x07e0, 0x0fd9, 0x0feb, 0x1fe3, 0x1fe9, 0x07c4, 0x01e5,
+ 0x03d7, 0x07c6, 0x07cf, 0x07da, 0x0fcb, 0x0fda, 0x0fe3, 0x0fe9,
+ 0x1fe6, 0x1ff3, 0x1ff7, 0x07d3, 0x03d8, 0x03e1, 0x07d4, 0x07d9,
+ 0x0fd3, 0x0fde, 0x1fdd, 0x1fd9, 0x1fe2, 0x1fea, 0x1ff1, 0x1ff6,
+ 0x07d2, 0x03d4, 0x03da, 0x07c7, 0x07d7, 0x07e2, 0x0fce, 0x0fdb,
+ 0x1fd8, 0x1fee, 0x3ff0, 0x1ff4, 0x3ff2, 0x07e1, 0x03df, 0x07c9,
+ 0x07d6, 0x0fca, 0x0fd0, 0x0fe5, 0x0fe6, 0x1feb, 0x1fef, 0x3ff3,
+ 0x3ff4, 0x3ff5, 0x0fe0, 0x07ce, 0x07d5, 0x0fc6, 0x0fd1, 0x0fe1,
+ 0x1fe0, 0x1fe8, 0x1ff0, 0x3ff1, 0x3ff8, 0x3ff6, 0x7ffc, 0x0fe8,
+ 0x07df, 0x0fc9, 0x0fd7, 0x0fdc, 0x1fdc, 0x1fdf, 0x1fed, 0x1ff5,
+ 0x3ff9, 0x3ffb, 0x7ffd, 0x7ffe, 0x1fe7, 0x0fcc, 0x0fd6, 0x0fdf,
+ 0x1fde, 0x1fda, 0x1fe5, 0x1ff2, 0x3ffa, 0x3ff7, 0x3ffc, 0x3ffd,
+ 0x7fff
+];
+const AAC_SPEC_CB10_BITS: &[u8] = &[
+ 6, 5, 6, 6, 7, 8, 9, 10, 10, 10, 11, 11, 12, 5, 4, 4,
+ 5, 6, 7, 7, 8, 8, 9, 10, 10, 11, 6, 4, 5, 5, 6, 6,
+ 7, 8, 8, 9, 9, 10, 10, 6, 5, 5, 5, 6, 7, 7, 8, 8,
+ 9, 9, 10, 10, 7, 6, 6, 6, 6, 7, 7, 8, 8, 9, 9, 10,
+ 10, 8, 7, 6, 7, 7, 7, 8, 8, 8, 9, 10, 10, 11, 9, 7,
+ 7, 7, 7, 8, 8, 9, 9, 9, 10, 10, 11, 9, 8, 8, 8, 8,
+ 8, 9, 9, 9, 10, 10, 11, 11, 9, 8, 8, 8, 8, 8, 9, 9,
+ 10, 10, 10, 11, 11, 10, 9, 9, 9, 9, 9, 9, 10, 10, 10, 11,
+ 11, 12, 10, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 11,
+ 10, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 12, 11, 10, 10, 10,
+ 10, 10, 10, 11, 11, 12, 12, 12, 12
+];
+const AAC_SPEC_CB10_CODES: &[u16] = &[
+ 0x022, 0x008, 0x01d, 0x026, 0x05f, 0x0d3, 0x1cf, 0x3d0,
+ 0x3d7, 0x3ed, 0x7f0, 0x7f6, 0xffd, 0x007, 0x000, 0x001,
+ 0x009, 0x020, 0x054, 0x060, 0x0d5, 0x0dc, 0x1d4, 0x3cd,
+ 0x3de, 0x7e7, 0x01c, 0x002, 0x006, 0x00c, 0x01e, 0x028,
+ 0x05b, 0x0cd, 0x0d9, 0x1ce, 0x1dc, 0x3d9, 0x3f1, 0x025,
+ 0x00b, 0x00a, 0x00d, 0x024, 0x057, 0x061, 0x0cc, 0x0dd,
+ 0x1cc, 0x1de, 0x3d3, 0x3e7, 0x05d, 0x021, 0x01f, 0x023,
+ 0x027, 0x059, 0x064, 0x0d8, 0x0df, 0x1d2, 0x1e2, 0x3dd,
+ 0x3ee, 0x0d1, 0x055, 0x029, 0x056, 0x058, 0x062, 0x0ce,
+ 0x0e0, 0x0e2, 0x1da, 0x3d4, 0x3e3, 0x7eb, 0x1c9, 0x05e,
+ 0x05a, 0x05c, 0x063, 0x0ca, 0x0da, 0x1c7, 0x1ca, 0x1e0,
+ 0x3db, 0x3e8, 0x7ec, 0x1e3, 0x0d2, 0x0cb, 0x0d0, 0x0d7,
+ 0x0db, 0x1c6, 0x1d5, 0x1d8, 0x3ca, 0x3da, 0x7ea, 0x7f1,
+ 0x1e1, 0x0d4, 0x0cf, 0x0d6, 0x0de, 0x0e1, 0x1d0, 0x1d6,
+ 0x3d1, 0x3d5, 0x3f2, 0x7ee, 0x7fb, 0x3e9, 0x1cd, 0x1c8,
+ 0x1cb, 0x1d1, 0x1d7, 0x1df, 0x3cf, 0x3e0, 0x3ef, 0x7e6,
+ 0x7f8, 0xffa, 0x3eb, 0x1dd, 0x1d3, 0x1d9, 0x1db, 0x3d2,
+ 0x3cc, 0x3dc, 0x3ea, 0x7ed, 0x7f3, 0x7f9, 0xff9, 0x7f2,
+ 0x3ce, 0x1e4, 0x3cb, 0x3d8, 0x3d6, 0x3e2, 0x3e5, 0x7e8,
+ 0x7f4, 0x7f5, 0x7f7, 0xffb, 0x7fa, 0x3ec, 0x3df, 0x3e1,
+ 0x3e4, 0x3e6, 0x3f0, 0x7e9, 0x7ef, 0xff8, 0xffe, 0xffc,
+ 0xfff
+];
+const AAC_SPEC_CB11_BITS: &[u8] = &[
+ 4, 5, 6, 7, 8, 8, 9, 10, 10, 10, 11, 11, 12, 11, 12, 12,
+ 10, 5, 4, 5, 6, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 10,
+ 11, 8, 6, 5, 5, 6, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10,
+ 10, 10, 8, 7, 6, 6, 6, 7, 7, 8, 8, 8, 9, 9, 9, 10,
+ 10, 10, 10, 8, 8, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
+ 10, 10, 10, 10, 8, 8, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9,
+ 9, 10, 10, 10, 10, 8, 9, 8, 8, 8, 8, 8, 8, 8, 9, 9,
+ 9, 10, 10, 10, 10, 10, 8, 9, 8, 8, 8, 8, 8, 8, 9, 9,
+ 9, 10, 10, 10, 10, 10, 10, 8, 10, 9, 8, 8, 9, 9, 9, 9,
+ 9, 10, 10, 10, 10, 10, 10, 11, 8, 10, 9, 9, 9, 9, 9, 9,
+ 9, 10, 10, 10, 10, 10, 10, 11, 11, 8, 11, 9, 9, 9, 9, 9,
+ 9, 10, 10, 10, 10, 10, 11, 10, 11, 11, 8, 11, 10, 9, 9, 10,
+ 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 8, 11, 10, 10, 10,
+ 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 9, 11, 10, 9,
+ 9, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 9, 11, 10,
+ 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 9, 12,
+ 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 12, 12, 9,
+ 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9,
+ 5
+];
+const AAC_SPEC_CB11_CODES: &[u16] = &[
+ 0x000, 0x006, 0x019, 0x03d, 0x09c, 0x0c6, 0x1a7, 0x390,
+ 0x3c2, 0x3df, 0x7e6, 0x7f3, 0xffb, 0x7ec, 0xffa, 0xffe,
+ 0x38e, 0x005, 0x001, 0x008, 0x014, 0x037, 0x042, 0x092,
+ 0x0af, 0x191, 0x1a5, 0x1b5, 0x39e, 0x3c0, 0x3a2, 0x3cd,
+ 0x7d6, 0x0ae, 0x017, 0x007, 0x009, 0x018, 0x039, 0x040,
+ 0x08e, 0x0a3, 0x0b8, 0x199, 0x1ac, 0x1c1, 0x3b1, 0x396,
+ 0x3be, 0x3ca, 0x09d, 0x03c, 0x015, 0x016, 0x01a, 0x03b,
+ 0x044, 0x091, 0x0a5, 0x0be, 0x196, 0x1ae, 0x1b9, 0x3a1,
+ 0x391, 0x3a5, 0x3d5, 0x094, 0x09a, 0x036, 0x038, 0x03a,
+ 0x041, 0x08c, 0x09b, 0x0b0, 0x0c3, 0x19e, 0x1ab, 0x1bc,
+ 0x39f, 0x38f, 0x3a9, 0x3cf, 0x093, 0x0bf, 0x03e, 0x03f,
+ 0x043, 0x045, 0x09e, 0x0a7, 0x0b9, 0x194, 0x1a2, 0x1ba,
+ 0x1c3, 0x3a6, 0x3a7, 0x3bb, 0x3d4, 0x09f, 0x1a0, 0x08f,
+ 0x08d, 0x090, 0x098, 0x0a6, 0x0b6, 0x0c4, 0x19f, 0x1af,
+ 0x1bf, 0x399, 0x3bf, 0x3b4, 0x3c9, 0x3e7, 0x0a8, 0x1b6,
+ 0x0ab, 0x0a4, 0x0aa, 0x0b2, 0x0c2, 0x0c5, 0x198, 0x1a4,
+ 0x1b8, 0x38c, 0x3a4, 0x3c4, 0x3c6, 0x3dd, 0x3e8, 0x0ad,
+ 0x3af, 0x192, 0x0bd, 0x0bc, 0x18e, 0x197, 0x19a, 0x1a3,
+ 0x1b1, 0x38d, 0x398, 0x3b7, 0x3d3, 0x3d1, 0x3db, 0x7dd,
+ 0x0b4, 0x3de, 0x1a9, 0x19b, 0x19c, 0x1a1, 0x1aa, 0x1ad,
+ 0x1b3, 0x38b, 0x3b2, 0x3b8, 0x3ce, 0x3e1, 0x3e0, 0x7d2,
+ 0x7e5, 0x0b7, 0x7e3, 0x1bb, 0x1a8, 0x1a6, 0x1b0, 0x1b2,
+ 0x1b7, 0x39b, 0x39a, 0x3ba, 0x3b5, 0x3d6, 0x7d7, 0x3e4,
+ 0x7d8, 0x7ea, 0x0ba, 0x7e8, 0x3a0, 0x1bd, 0x1b4, 0x38a,
+ 0x1c4, 0x392, 0x3aa, 0x3b0, 0x3bc, 0x3d7, 0x7d4, 0x7dc,
+ 0x7db, 0x7d5, 0x7f0, 0x0c1, 0x7fb, 0x3c8, 0x3a3, 0x395,
+ 0x39d, 0x3ac, 0x3ae, 0x3c5, 0x3d8, 0x3e2, 0x3e6, 0x7e4,
+ 0x7e7, 0x7e0, 0x7e9, 0x7f7, 0x190, 0x7f2, 0x393, 0x1be,
+ 0x1c0, 0x394, 0x397, 0x3ad, 0x3c3, 0x3c1, 0x3d2, 0x7da,
+ 0x7d9, 0x7df, 0x7eb, 0x7f4, 0x7fa, 0x195, 0x7f8, 0x3bd,
+ 0x39c, 0x3ab, 0x3a8, 0x3b3, 0x3b9, 0x3d0, 0x3e3, 0x3e5,
+ 0x7e2, 0x7de, 0x7ed, 0x7f1, 0x7f9, 0x7fc, 0x193, 0xffd,
+ 0x3dc, 0x3b6, 0x3c7, 0x3cc, 0x3cb, 0x3d9, 0x3da, 0x7d3,
+ 0x7e1, 0x7ee, 0x7ef, 0x7f5, 0x7f6, 0xffc, 0xfff, 0x19d,
+ 0x1c2, 0x0b5, 0x0a1, 0x096, 0x097, 0x095, 0x099, 0x0a0,
+ 0x0a2, 0x0ac, 0x0a9, 0x0b1, 0x0b3, 0x0bb, 0x0c0, 0x18f,
+ 0x004
+];
+
+const AAC_SPEC_BITS: [&[u8]; 11] = [
+ AAC_SPEC_CB1_BITS, AAC_SPEC_CB2_BITS, AAC_SPEC_CB3_BITS, AAC_SPEC_CB4_BITS,
+ AAC_SPEC_CB5_BITS, AAC_SPEC_CB6_BITS, AAC_SPEC_CB7_BITS, AAC_SPEC_CB8_BITS,
+ AAC_SPEC_CB9_BITS, AAC_SPEC_CB10_BITS, AAC_SPEC_CB11_BITS
+];
+const AAC_SPEC_CODES: [&[u16]; 11] = [
+ AAC_SPEC_CB1_CODES, AAC_SPEC_CB2_CODES, AAC_SPEC_CB3_CODES, AAC_SPEC_CB4_CODES,
+ AAC_SPEC_CB5_CODES, AAC_SPEC_CB6_CODES, AAC_SPEC_CB7_CODES, AAC_SPEC_CB8_CODES,
+ AAC_SPEC_CB9_CODES, AAC_SPEC_CB10_CODES, AAC_SPEC_CB11_CODES
+];
+const AAC_UNSIGNED_CODEBOOK: [bool; 11] = [
+ false, false, true, true, false, false, true, true, true, true, true
+];
+const AAC_CODEBOOK_MODULO: [u16; 7] = [
+ 9, 9, 8, 8, 13, 13, 17
+];
+
+const AAC_QUADS: [[i8; 4]; 81] = [
+ [ 0, 0, 0, 0 ], [ 0, 0, 0, 1 ], [ 0, 0, 0, 2 ],
+ [ 0, 0, 1, 0 ], [ 0, 0, 1, 1 ], [ 0, 0, 1, 2 ],
+ [ 0, 0, 2, 0 ], [ 0, 0, 2, 1 ], [ 0, 0, 2, 2 ],
+ [ 0, 1, 0, 0 ], [ 0, 1, 0, 1 ], [ 0, 1, 0, 2 ],
+ [ 0, 1, 1, 0 ], [ 0, 1, 1, 1 ], [ 0, 1, 1, 2 ],
+ [ 0, 1, 2, 0 ], [ 0, 1, 2, 1 ], [ 0, 1, 2, 2 ],
+ [ 0, 2, 0, 0 ], [ 0, 2, 0, 1 ], [ 0, 2, 0, 2 ],
+ [ 0, 2, 1, 0 ], [ 0, 2, 1, 1 ], [ 0, 2, 1, 2 ],
+ [ 0, 2, 2, 0 ], [ 0, 2, 2, 1 ], [ 0, 2, 2, 2 ],
+ [ 1, 0, 0, 0 ], [ 1, 0, 0, 1 ], [ 1, 0, 0, 2 ],
+ [ 1, 0, 1, 0 ], [ 1, 0, 1, 1 ], [ 1, 0, 1, 2 ],
+ [ 1, 0, 2, 0 ], [ 1, 0, 2, 1 ], [ 1, 0, 2, 2 ],
+ [ 1, 1, 0, 0 ], [ 1, 1, 0, 1 ], [ 1, 1, 0, 2 ],
+ [ 1, 1, 1, 0 ], [ 1, 1, 1, 1 ], [ 1, 1, 1, 2 ],
+ [ 1, 1, 2, 0 ], [ 1, 1, 2, 1 ], [ 1, 1, 2, 2 ],
+ [ 1, 2, 0, 0 ], [ 1, 2, 0, 1 ], [ 1, 2, 0, 2 ],
+ [ 1, 2, 1, 0 ], [ 1, 2, 1, 1 ], [ 1, 2, 1, 2 ],
+ [ 1, 2, 2, 0 ], [ 1, 2, 2, 1 ], [ 1, 2, 2, 2 ],
+ [ 2, 0, 0, 0 ], [ 2, 0, 0, 1 ], [ 2, 0, 0, 2 ],
+ [ 2, 0, 1, 0 ], [ 2, 0, 1, 1 ], [ 2, 0, 1, 2 ],
+ [ 2, 0, 2, 0 ], [ 2, 0, 2, 1 ], [ 2, 0, 2, 2 ],
+ [ 2, 1, 0, 0 ], [ 2, 1, 0, 1 ], [ 2, 1, 0, 2 ],
+ [ 2, 1, 1, 0 ], [ 2, 1, 1, 1 ], [ 2, 1, 1, 2 ],
+ [ 2, 1, 2, 0 ], [ 2, 1, 2, 1 ], [ 2, 1, 2, 2 ],
+ [ 2, 2, 0, 0 ], [ 2, 2, 0, 1 ], [ 2, 2, 0, 2 ],
+ [ 2, 2, 1, 0 ], [ 2, 2, 1, 1 ], [ 2, 2, 1, 2 ],
+ [ 2, 2, 2, 0 ], [ 2, 2, 2, 1 ], [ 2, 2, 2, 2 ],
+];
+
--- /dev/null
+use nihav_core::codecs::{DecoderResult, DecoderError};
+use nihav_core::io::bitreader::*;
+use std::fmt;
+
+#[allow(non_camel_case_types)]
+#[derive(Clone,Copy,PartialEq)]
+pub enum M4AType {
+ None,
+ Main,
+ LC,
+ SSR,
+ LTP,
+ SBR,
+ Scalable,
+ TwinVQ,
+ CELP,
+ HVXC,
+ TTSI,
+ MainSynth,
+ WavetableSynth,
+ GeneralMIDI,
+ Algorithmic,
+ ER_AAC_LC,
+ ER_AAC_LTP,
+ ER_AAC_Scalable,
+ ER_TwinVQ,
+ ER_BSAC,
+ ER_AAC_LD,
+ ER_CELP,
+ ER_HVXC,
+ ER_HILN,
+ ER_Parametric,
+ SSC,
+ PS,
+ MPEGSurround,
+ Layer1,
+ Layer2,
+ Layer3,
+ DST,
+ ALS,
+ SLS,
+ SLSNonCore,
+ ER_AAC_ELD,
+ SMRSimple,
+ SMRMain,
+ Reserved,
+ Unknown,
+}
+
+const M4A_TYPES: &[M4AType] = &[
+ M4AType::None, M4AType::Main, M4AType::LC, M4AType::SSR,
+ M4AType::LTP, M4AType::SBR, M4AType::Scalable, M4AType::TwinVQ,
+ M4AType::CELP, M4AType::HVXC, M4AType::Reserved, M4AType::Reserved,
+ M4AType::TTSI, M4AType::MainSynth, M4AType::WavetableSynth, M4AType::GeneralMIDI,
+ M4AType::Algorithmic, M4AType::ER_AAC_LC, M4AType::Reserved, M4AType::ER_AAC_LTP,
+ M4AType::ER_AAC_Scalable, M4AType::ER_TwinVQ, M4AType::ER_BSAC, M4AType::ER_AAC_LD,
+ M4AType::ER_CELP, M4AType::ER_HVXC, M4AType::ER_HILN, M4AType::ER_Parametric,
+ M4AType::SSC, M4AType::PS, M4AType::MPEGSurround, M4AType::Reserved /*escape*/,
+ M4AType::Layer1, M4AType::Layer2, M4AType::Layer3, M4AType::DST,
+ M4AType::ALS, M4AType::SLS, M4AType::SLSNonCore, M4AType::ER_AAC_ELD,
+ M4AType::SMRSimple, M4AType::SMRMain,
+];
+const M4A_TYPE_NAMES: &[&str] = &[
+ "None", "AAC Main", "AAC LC", "AAC SSR", "AAC LTP", "SBR", "AAC Scalable", "TwinVQ", "CELP", "HVXC",
+ /*"(reserved10)", "(reserved11)", */ "TTSI",
+ "Main synthetic", "Wavetable synthesis", "General MIDI", "Algorithmic Synthesis and Audio FX",
+ "ER AAC LC", /*"(reserved18)",*/ "ER AAC LTP", "ER AAC Scalable", "ER TwinVQ", "ER BSAC", "ER AAC LD",
+ "ER CELP", "ER HVXC", "ER HILN", "ER Parametric", "SSC", "PS", "MPEG Surround", /*"(escape)",*/
+ "Layer-1", "Layer-2", "Layer-3", "DST", "ALS", "SLS", "SLS non-core", "ER AAC ELD", "SMR Simple", "SMR Main",
+ "(reserved)", "(unknown)",
+];
+
+impl fmt::Display for M4AType {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ write!(f, "{}", M4A_TYPE_NAMES[*self as usize])
+ }
+}
+
+const AAC_SAMPLE_RATES: [u32; 16] = [
+ 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
+ 16000, 12000, 11025, 8000, 7350, 0, 0, 0
+];
+
+const AAC_CHANNELS: [usize; 8] = [ 0, 1, 2, 3, 4, 5, 6, 8 ];
+
+pub struct M4AInfo {
+ pub otype: M4AType,
+ pub srate: u32,
+ pub channels: usize,
+ pub samples: usize,
+ pub sbr_ps_info: Option<(u32, usize)>,
+ pub sbr_present: bool,
+ pub ps_present: bool,
+}
+
+impl M4AInfo {
+ pub fn new() -> Self {
+ Self {
+ otype: M4AType::None,
+ srate: 0,
+ channels: 0,
+ samples: 0,
+ sbr_ps_info: Option::None,
+ sbr_present: false,
+ ps_present: false,
+ }
+ }
+ fn read_object_type(br: &mut BitReader) -> DecoderResult<M4AType> {
+ let otypeidx;
+ if br.peek(5) == 31 {
+ br.skip(5)?;
+ otypeidx = (br.read(6)? as usize) + 32;
+ } else {
+ otypeidx = br.read(5)? as usize;
+ }
+ if otypeidx >= M4A_TYPES.len() {
+ Ok(M4AType::Unknown)
+ } else {
+ Ok(M4A_TYPES[otypeidx])
+ }
+ }
+ fn read_sampling_frequency(br: &mut BitReader) -> DecoderResult<u32> {
+ if br.peek(4) == 15 {
+ let srate = br.read(24)?;
+ Ok(srate)
+ } else {
+ let srate_idx = br.read(4)? as usize;
+ Ok(AAC_SAMPLE_RATES[srate_idx])
+ }
+ }
+ fn read_channel_config(br: &mut BitReader) -> DecoderResult<usize> {
+ let chidx = br.read(4)? as usize;
+ if chidx < AAC_CHANNELS.len() {
+ Ok(AAC_CHANNELS[chidx])
+ } else {
+ Ok(chidx)
+ }
+ }
+ pub fn read(&mut self, src: &[u8]) -> DecoderResult<()> {
+ let mut br = BitReader::new(src, BitReaderMode::BE);
+ self.otype = Self::read_object_type(&mut br)?;
+ self.srate = Self::read_sampling_frequency(&mut br)?;
+ validate!(self.srate > 0);
+ self.channels = Self::read_channel_config(&mut br)?;
+
+ if (self.otype == M4AType::SBR) || (self.otype == M4AType::PS) {
+ let ext_srate = Self::read_sampling_frequency(&mut br)?;
+ self.otype = Self::read_object_type(&mut br)?;
+ let ext_chans;
+ if self.otype == M4AType::ER_BSAC {
+ ext_chans = Self::read_channel_config(&mut br)?;
+ } else {
+ ext_chans = 0;
+ }
+ self.sbr_ps_info = Some((ext_srate, ext_chans));
+ }
+
+ match self.otype {
+ M4AType::Main | M4AType::LC | M4AType::SSR | M4AType::Scalable | M4AType::TwinVQ |
+ M4AType::ER_AAC_LC | M4AType::ER_AAC_LTP | M4AType::ER_AAC_Scalable | M4AType::ER_TwinVQ |
+ M4AType::ER_BSAC | M4AType::ER_AAC_LD => {
+ // GASpecificConfig
+ let short_frame = br.read_bool()?;
+ self.samples = if short_frame { 960 } else { 1024 };
+ let depends_on_core = br.read_bool()?;
+ if depends_on_core {
+ let _delay = br.read(14)?;
+ }
+ let extension_flag = br.read_bool()?;
+ if self.channels == 0 {
+ unimplemented!("program config element");
+ }
+ if (self.otype == M4AType::Scalable) || (self.otype == M4AType::ER_AAC_Scalable) {
+ let _layer = br.read(3)?;
+ }
+ if extension_flag {
+ if self.otype == M4AType::ER_BSAC {
+ let _num_subframes = br.read(5)? as usize;
+ let _layer_length = br.read(11)?;
+ }
+ if (self.otype == M4AType::ER_AAC_LC) ||
+ (self.otype == M4AType::ER_AAC_LTP) ||
+ (self.otype == M4AType::ER_AAC_Scalable) ||
+ (self.otype == M4AType::ER_AAC_LD) {
+ let _section_data_resilience = br.read_bool()?;
+ let _scalefactors_resilience = br.read_bool()?;
+ let _spectral_data_resilience = br.read_bool()?;
+ }
+ let extension_flag3 = br.read_bool()?;
+ if extension_flag3 {
+ unimplemented!("version3 extensions");
+ }
+ }
+ },
+ M4AType::CELP => { unimplemented!("CELP config"); },
+ M4AType::HVXC => { unimplemented!("HVXC config"); },
+ M4AType::TTSI => { unimplemented!("TTS config"); },
+ M4AType::MainSynth | M4AType::WavetableSynth | M4AType::GeneralMIDI | M4AType::Algorithmic => { unimplemented!("structured audio config"); },
+ M4AType::ER_CELP => { unimplemented!("ER CELP config"); },
+ M4AType::ER_HVXC => { unimplemented!("ER HVXC config"); },
+ M4AType::ER_HILN | M4AType::ER_Parametric => { unimplemented!("parametric config"); },
+ M4AType::SSC => { unimplemented!("SSC config"); },
+ M4AType::MPEGSurround => {
+ br.skip(1)?; // sacPayloadEmbedding
+ unimplemented!("MPEG Surround config");
+ },
+ M4AType::Layer1 | M4AType::Layer2 | M4AType::Layer3 => { unimplemented!("MPEG Layer 1/2/3 config"); },
+ M4AType::DST => { unimplemented!("DST config"); },
+ M4AType::ALS => {
+ br.skip(5)?; // fillBits
+ unimplemented!("ALS config");
+ },
+ M4AType::SLS | M4AType::SLSNonCore => { unimplemented!("SLS config"); },
+ M4AType::ER_AAC_ELD => { unimplemented!("ELD config"); },
+ M4AType::SMRSimple | M4AType::SMRMain => { unimplemented!("symbolic music config"); },
+ _ => {},
+ };
+ match self.otype {
+ M4AType::ER_AAC_LC | M4AType::ER_AAC_LTP | M4AType::ER_AAC_Scalable | M4AType::ER_TwinVQ |
+ M4AType::ER_BSAC | M4AType::ER_AAC_LD | M4AType::ER_CELP | M4AType::ER_HVXC |
+ M4AType::ER_HILN | M4AType::ER_Parametric | M4AType::ER_AAC_ELD => {
+ let ep_config = br.read(2)?;
+ if (ep_config == 2) || (ep_config == 3) {
+ unimplemented!("error protection config");
+ }
+ if ep_config == 3 {
+ let direct_mapping = br.read_bool()?;
+ validate!(direct_mapping);
+ }
+ },
+ _ => {},
+ };
+ if self.sbr_ps_info.is_some() && (br.left() >= 16) {
+ let sync = br.read(11)?;
+ if sync == 0x2B7 {
+ let ext_otype = Self::read_object_type(&mut br)?;
+ if ext_otype == M4AType::SBR {
+ self.sbr_present = br.read_bool()?;
+ if self.sbr_present {
+ let _ext_srate = Self::read_sampling_frequency(&mut br)?;
+ if br.left() >= 12 {
+ let sync = br.read(11)?;
+ if sync == 0x548 {
+ self.ps_present = br.read_bool()?;
+ }
+ }
+ }
+ }
+ if ext_otype == M4AType::PS {
+ self.sbr_present = br.read_bool()?;
+ if self.sbr_present {
+ let _ext_srate = Self::read_sampling_frequency(&mut br)?;
+ }
+ let _ext_channels = br.read(4)?;
+ }
+ }
+ }
+
+ Ok(())
+ }
+}
+
+impl fmt::Display for M4AInfo {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ write!(f, "MPEG 4 Audio {}, {} Hz, {} channels, {} samples per frame",
+ self.otype, self.srate, self.channels, self.samples)
+ }
+}
+
--- /dev/null
+use nihav_core::formats::*;
+use nihav_core::frame::*;
+use nihav_core::codecs::*;
+use nihav_codec_support::dsp::mdct::IMDCT;
+use nihav_codec_support::dsp::window::*;
+use nihav_core::io::bitreader::*;
+use nihav_core::io::byteio::*;
+use std::str::FromStr;
+
+mod coeff_read;
+use coeff_read::*;
+mod info;
+use info::*;
+mod tables;
+use tables::*;
+mod tools;
+use tools::*;
+
+const MAX_WINDOWS: usize = 8;
+const MAX_SFBS: usize = 64;
+
+#[derive(Clone,Copy)]
+pub struct ICSInfo {
+ window_sequence: u8,
+ prev_window_sequence: u8,
+ window_shape: bool,
+ prev_window_shape: bool,
+ scale_factor_grouping: [bool; MAX_WINDOWS],
+ group_start: [usize; MAX_WINDOWS],
+ window_groups: usize,
+ num_windows: usize,
+ max_sfb: usize,
+ predictor_data: Option<LTPData>,
+ long_win: bool,
+}
+
+const ONLY_LONG_SEQUENCE: u8 = 0;
+const LONG_START_SEQUENCE: u8 = 1;
+const EIGHT_SHORT_SEQUENCE: u8 = 2;
+const LONG_STOP_SEQUENCE: u8 = 3;
+
+impl ICSInfo {
+ fn new() -> Self {
+ Self {
+ window_sequence: 0,
+ prev_window_sequence: 0,
+ window_shape: false,
+ prev_window_shape: false,
+ scale_factor_grouping: [false; MAX_WINDOWS],
+ group_start: [0; MAX_WINDOWS],
+ num_windows: 0,
+ window_groups: 0,
+ max_sfb: 0,
+ predictor_data: None,
+ long_win: true,
+ }
+ }
+ fn decode_ics_info(&mut self, br: &mut BitReader) -> DecoderResult<()> {
+ self.prev_window_sequence = self.window_sequence;
+ self.prev_window_shape = self.window_shape;
+ let ics_reserved_bit = br.read(1)?;
+ validate!(ics_reserved_bit == 0);
+ self.window_sequence = br.read(2)? as u8;
+ match self.prev_window_sequence {
+ ONLY_LONG_SEQUENCE | LONG_STOP_SEQUENCE => {
+ if (self.window_sequence != ONLY_LONG_SEQUENCE) &&
+ (self.window_sequence != LONG_START_SEQUENCE) {
+ println!("incorrect previous window");
+ }
+ },
+ LONG_START_SEQUENCE | EIGHT_SHORT_SEQUENCE => {
+ if (self.window_sequence != EIGHT_SHORT_SEQUENCE) &&
+ (self.window_sequence != LONG_STOP_SEQUENCE) {
+ println!("incorrect previous window");
+ }
+ },
+ _ => {},
+ };
+ self.window_shape = br.read_bool()?;
+ self.window_groups = 1;
+ if self.window_sequence == EIGHT_SHORT_SEQUENCE {
+ self.long_win = false;
+ self.num_windows = 8;
+ self.max_sfb = br.read(4)? as usize;
+ for i in 0..MAX_WINDOWS-1 {
+ self.scale_factor_grouping[i] = br.read_bool()?;
+ if !self.scale_factor_grouping[i] {
+ self.group_start[self.window_groups] = i + 1;
+ self.window_groups += 1;
+ }
+ }
+ } else {
+ self.long_win = true;
+ self.num_windows = 1;
+ self.max_sfb = br.read(6)? as usize;
+ self.predictor_data = LTPData::read(br)?;
+ }
+ Ok(())
+ }
+ fn get_group_start(&self, g: usize) -> usize {
+ if g == 0 {
+ 0
+ } else if g >= self.window_groups {
+ if self.long_win { 1 } else { 8 }
+ } else {
+ self.group_start[g]
+ }
+ }
+}
+
+#[derive(Clone)]
+struct ICS {
+ global_gain: u8,
+ info: ICSInfo,
+ pulse_data: Option<PulseData>,
+ tns_data: Option<TNSData>,
+ gain_control: Option<GainControlData>,
+ sect_cb: [[u8; MAX_SFBS]; MAX_WINDOWS],
+ sect_len: [[usize; MAX_SFBS]; MAX_WINDOWS],
+ sfb_cb: [[u8; MAX_SFBS]; MAX_WINDOWS],
+ num_sec: [usize; MAX_WINDOWS],
+ scales: [[u8; MAX_SFBS]; MAX_WINDOWS],
+ sbinfo: GASubbandInfo,
+ coeffs: [f32; 1024],
+ delay: [f32; 1024],
+}
+
+const INTENSITY_SCALE_MIN: i16 = -155;
+impl ICS {
+ fn new(sbinfo: GASubbandInfo) -> Self {
+ Self {
+ global_gain: 0,
+ info: ICSInfo::new(),
+ pulse_data: None,
+ tns_data: None,
+ gain_control: None,
+ sect_cb: [[0; MAX_SFBS]; MAX_WINDOWS],
+ sect_len: [[0; MAX_SFBS]; MAX_WINDOWS],
+ sfb_cb: [[0; MAX_SFBS]; MAX_WINDOWS],
+ scales: [[0; MAX_SFBS]; MAX_WINDOWS],
+ num_sec: [0; MAX_WINDOWS],
+ sbinfo,
+ coeffs: [0.0; 1024],
+ delay: [0.0; 1024],
+ }
+ }
+ fn decode_section_data(&mut self, br: &mut BitReader, may_have_intensity: bool) -> DecoderResult<()> {
+ let sect_bits = if self.info.long_win { 5 } else { 3 };
+ let sect_esc_val = (1 << sect_bits) - 1;
+
+ for g in 0..self.info.window_groups {
+ let mut k = 0;
+ let mut l = 0;
+ while k < self.info.max_sfb {
+ self.sect_cb[g][l] = br.read(4)? as u8;
+ self.sect_len[g][l] = 0;
+ validate!(self.sect_cb[g][l] != RESERVED_HCB);
+ if ((self.sect_cb[g][l] == INTENSITY_HCB) || (self.sect_cb[g][l] == INTENSITY_HCB2)) && !may_have_intensity {
+ return Err(DecoderError::InvalidData);
+ }
+ loop {
+ let sect_len_incr = br.read(sect_bits)? as usize;
+ self.sect_len[g][l] += sect_len_incr;
+ if sect_len_incr < sect_esc_val { break; }
+ }
+ validate!(k + self.sect_len[g][l] <= self.info.max_sfb);
+ for _ in 0..self.sect_len[g][l] {
+ self.sfb_cb[g][k] = self.sect_cb[g][l];
+ k += 1;
+ }
+ l += 1;
+ }
+ self.num_sec[g] = l;
+ }
+ Ok(())
+ }
+ fn is_intensity(&self, g: usize, sfb: usize) -> bool {
+ (self.sfb_cb[g][sfb] == INTENSITY_HCB) || (self.sfb_cb[g][sfb] == INTENSITY_HCB2)
+ }
+ fn get_intensity_dir(&self, g: usize, sfb: usize) -> bool {
+ self.sfb_cb[g][sfb] == INTENSITY_HCB
+ }
+ fn decode_scale_factor_data(&mut self, br: &mut BitReader, codebooks: &Codebooks) -> DecoderResult<()> {
+ decode_scale_factor_data(br, &mut self.scales, self.global_gain, &self.info, &self.sfb_cb, codebooks)
+ }
+ fn get_band_start(&self, swb: usize) -> usize {
+ if self.info.long_win {
+ self.sbinfo.long_bands[swb]
+ } else {
+ self.sbinfo.short_bands[swb]
+ }
+ }
+ fn get_num_bands(&self) -> usize {
+ if self.info.long_win {
+ self.sbinfo.long_bands.len() - 1
+ } else {
+ self.sbinfo.short_bands.len() - 1
+ }
+ }
+ fn decode_spectrum(&mut self, br: &mut BitReader, codebooks: &Codebooks) -> DecoderResult<()> {
+ self.coeffs = [0.0; 1024];
+ decode_spectrum(br, &mut self.coeffs, &self.scales, &self.info, &self.sbinfo, &self.sfb_cb, codebooks)
+ }
+ fn place_pulses(&mut self) {
+ if let Some(ref pdata) = self.pulse_data {
+ if pdata.pulse_start_sfb >= self.sbinfo.long_bands.len() - 1 { return; }
+ let mut k = self.get_band_start(pdata.pulse_start_sfb);
+ let mut band = pdata.pulse_start_sfb;
+ for pno in 0..pdata.number_pulse {
+ k += pdata.pulse_offset[pno] as usize;
+ if k >= 1024 { return; }
+ while self.get_band_start(band + 1) <= k { band += 1; }
+ let scale = get_scale(self.scales[0][band]);
+ let mut base = self.coeffs[k];
+ if base != 0.0 {
+ base = requant(self.coeffs[k], scale);
+ }
+ if base > 0.0 {
+ base += f32::from(pdata.pulse_amp[pno]);
+ } else {
+ base -= f32::from(pdata.pulse_amp[pno]);
+ }
+ self.coeffs[k] = iquant(base) * scale;
+ }
+ }
+ }
+ fn decode_ics(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType, common_window: bool, may_have_intensity: bool) -> DecoderResult<()> {
+ self.global_gain = br.read(8)? as u8;
+ if !common_window {
+ self.info.decode_ics_info(br)?;
+ }
+ self.decode_section_data(br, may_have_intensity)?;
+ self.decode_scale_factor_data(br, codebooks)?;
+ self.pulse_data = PulseData::read(br)?;
+ validate!(self.pulse_data.is_none() || self.info.long_win);
+ let tns_max_order;
+ if !self.info.long_win {
+ tns_max_order = 7;
+ } else if m4atype == M4AType::LC {
+ tns_max_order = 12;
+ } else {
+ tns_max_order = TNS_MAX_ORDER;
+ }
+ self.tns_data = TNSData::read(br, self.info.long_win, self.info.num_windows, tns_max_order)?;
+ if m4atype == M4AType::SSR {
+ self.gain_control = GainControlData::read(br)?;
+ } else {
+ let gain_control_data_present = br.read_bool()?;
+ validate!(!gain_control_data_present);
+ }
+ self.decode_spectrum(br, codebooks)?;
+ Ok(())
+ }
+ fn synth_channel(&mut self, dsp: &mut DSP, dst: &mut [f32], srate_idx: usize) {
+ self.place_pulses();
+ if let Some(ref tns_data) = self.tns_data {
+ let tns_max_bands = TNSData::get_max_bands(self.info.long_win, srate_idx).min(self.info.max_sfb);
+ for w in 0..self.info.num_windows {
+ let mut bottom = self.get_num_bands();
+ for f in 0..tns_data.n_filt[w] {
+ let top = bottom;
+ bottom = if top >= tns_data.coeffs[w][f].length { top - tns_data.coeffs[w][f].length } else { 0 };
+ let order = tns_data.coeffs[w][f].order;
+ if order == 0 { continue; }
+ let start = w * 128 + self.get_band_start(tns_max_bands.min(bottom));
+ let end = w * 128 + self.get_band_start(tns_max_bands.min(top));
+ tns_data.apply(&mut self.coeffs, w, f, start, end);
+ }
+ }
+ }
+ dsp.synth(&self.coeffs, &mut self.delay, self.info.window_sequence, self.info.window_shape, self.info.prev_window_shape, dst);
+ }
+}
+
+#[derive(Clone)]
+struct ChannelPair {
+ pair: bool,
+ channel: usize,
+ common_window: bool,
+ ms_mask_present: u8,
+ ms_used: [[bool; MAX_SFBS]; MAX_WINDOWS],
+ ics: [ICS; 2],
+}
+
+impl ChannelPair {
+ fn new(pair: bool, channel: usize, sbinfo: GASubbandInfo) -> Self {
+ Self {
+ pair, channel,
+ common_window: false,
+ ms_mask_present: 0,
+ ms_used: [[false; MAX_SFBS]; MAX_WINDOWS],
+ ics: [ICS::new(sbinfo), ICS::new(sbinfo)],
+ }
+ }
+ fn decode_ga_sce(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType) -> DecoderResult<()> {
+ self.ics[0].decode_ics(br, codebooks, m4atype, false, false)?;
+ Ok(())
+ }
+ fn decode_ga_cpe(&mut self, br: &mut BitReader, codebooks: &Codebooks, m4atype: M4AType) -> DecoderResult<()> {
+ let common_window = br.read_bool()?;
+ self.common_window = common_window;
+ if common_window {
+ self.ics[0].info.decode_ics_info(br)?;
+ self.ms_mask_present = br.read(2)? as u8;
+ validate!(self.ms_mask_present != 3);
+ if self.ms_mask_present == 1 {
+ for g in 0..self.ics[0].info.window_groups {
+ for sfb in 0..self.ics[0].info.max_sfb {
+ self.ms_used[g][sfb] = br.read_bool()?;
+ }
+ }
+ }
+ self.ics[1].info = self.ics[0].info;
+ }
+ self.ics[0].decode_ics(br, codebooks, m4atype, common_window, true)?;
+ self.ics[1].decode_ics(br, codebooks, m4atype, common_window, true)?;
+ if common_window && self.ms_mask_present != 0 {
+ let mut g = 0;
+ for w in 0..self.ics[0].info.num_windows {
+ if w > 0 && !self.ics[0].info.scale_factor_grouping[w - 1] {
+ g += 1;
+ }
+ for sfb in 0..self.ics[0].info.max_sfb {
+ let start = w * 128 + self.ics[0].get_band_start(sfb);
+ let end = w * 128 + self.ics[0].get_band_start(sfb + 1);
+ if self.ics[0].is_intensity(g, sfb) {
+ let invert = (self.ms_mask_present == 1) && self.ms_used[g][sfb];
+ let dir = self.ics[0].get_intensity_dir(g, sfb) ^ invert;
+ let scale = 0.5f32.powf(0.25 * (f32::from(self.ics[0].scales[g][sfb]) + f32::from(INTENSITY_SCALE_MIN)));
+ if !dir {
+ for i in start..end {
+ self.ics[1].coeffs[i] = scale * self.ics[0].coeffs[i];
+ }
+ } else {
+ for i in start..end {
+ self.ics[1].coeffs[i] = -scale * self.ics[0].coeffs[i];
+ }
+ }
+ } else if (self.ms_mask_present == 2) || self.ms_used[g][sfb] {
+ for i in start..end {
+ let tmp = self.ics[0].coeffs[i] - self.ics[1].coeffs[i];
+ self.ics[0].coeffs[i] += self.ics[1].coeffs[i];
+ self.ics[1].coeffs[i] = tmp;
+ }
+ }
+ }
+ }
+ }
+ Ok(())
+ }
+ fn synth_audio(&mut self, dsp: &mut DSP, abuf: &mut NABufferType, srate_idx: usize) {
+ let mut adata = abuf.get_abuf_f32().unwrap();
+ let output = adata.get_data_mut().unwrap();
+ let off0 = abuf.get_offset(self.channel);
+ let off1 = abuf.get_offset(self.channel + 1);
+ self.ics[0].synth_channel(dsp, &mut output[off0..], srate_idx);
+ if self.pair {
+ self.ics[1].synth_channel(dsp, &mut output[off1..], srate_idx);
+ }
+ }
+}
+
+struct DSP {
+ kbd_long_win: [f32; 1024],
+ kbd_short_win: [f32; 128],
+ sine_long_win: [f32; 1024],
+ sine_short_win: [f32; 128],
+ imdct_long: IMDCT,
+ imdct_short: IMDCT,
+ tmp: [f32; 2048],
+ ew_buf: [f32; 1152],
+}
+
+const SHORT_WIN_POINT0: usize = 512 - 64;
+const SHORT_WIN_POINT1: usize = 512 + 64;
+
+impl DSP {
+ fn new() -> Self {
+ let mut kbd_long_win: [f32; 1024] = [0.0; 1024];
+ let mut kbd_short_win: [f32; 128] = [0.0; 128];
+ generate_window(WindowType::KaiserBessel(4.0), 1.0, 1024, true, &mut kbd_long_win);
+ generate_window(WindowType::KaiserBessel(6.0), 1.0, 128, true, &mut kbd_short_win);
+ let mut sine_long_win: [f32; 1024] = [0.0; 1024];
+ let mut sine_short_win: [f32; 128] = [0.0; 128];
+ generate_window(WindowType::Sine, 1.0, 1024, true, &mut sine_long_win);
+ generate_window(WindowType::Sine, 1.0, 128, true, &mut sine_short_win);
+ Self {
+ kbd_long_win, kbd_short_win,
+ sine_long_win, sine_short_win,
+ imdct_long: IMDCT::new(1024 * 2, true),
+ imdct_short: IMDCT::new(128 * 2, true),
+ tmp: [0.0; 2048], ew_buf: [0.0; 1152],
+ }
+ }
+ #[allow(clippy::cognitive_complexity)]
+ fn synth(&mut self, coeffs: &[f32; 1024], delay: &mut [f32; 1024], seq: u8, window_shape: bool, prev_window_shape: bool, dst: &mut [f32]) {
+ let long_win = if window_shape { &self.kbd_long_win } else { &self.sine_long_win };
+ let short_win = if window_shape { &self.kbd_short_win } else { &self.sine_short_win };
+ let left_long_win = if prev_window_shape { &self.kbd_long_win } else { &self.sine_long_win };
+ let left_short_win = if prev_window_shape { &self.kbd_short_win } else { &self.sine_short_win };
+ if seq != EIGHT_SHORT_SEQUENCE {
+ self.imdct_long.imdct(coeffs, &mut self.tmp);
+ } else {
+ for (ain, aout) in coeffs.chunks(128).zip(self.tmp.chunks_mut(256)) {
+ self.imdct_short.imdct(ain, aout);
+ }
+ self.ew_buf = [0.0; 1152];
+ for (w, src) in self.tmp.chunks(256).enumerate() {
+ if w > 0 {
+ for i in 0..128 {
+ self.ew_buf[w * 128 + i] += src[i] * short_win[i];
+ }
+ } else { // to be left-windowed
+ for i in 0..128 {
+ self.ew_buf[i] = src[i];
+ }
+ }
+ for i in 0..128 {
+ self.ew_buf[w * 128 + i + 128] += src[i + 128] * short_win[127 - i];
+ }
+ }
+ }
+ if seq == ONLY_LONG_SEQUENCE { // should be the most common case
+ for i in 0..1024 {
+ dst[i] = delay[i] + self.tmp[i] * left_long_win[i];
+ delay[i] = self.tmp[i + 1024] * long_win[1023 - i];
+ }
+ return;
+ }
+ // output new data
+ match seq {
+ ONLY_LONG_SEQUENCE | LONG_START_SEQUENCE => {
+ for i in 0..1024 {
+ dst[i] = self.tmp[i] * left_long_win[i] + delay[i];
+ }
+ },
+ EIGHT_SHORT_SEQUENCE => {
+ for i in 0..SHORT_WIN_POINT0 {
+ dst[i] = delay[i];
+ }
+ for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 {
+ let j = i - SHORT_WIN_POINT0;
+ dst[i] = delay[i] + self.ew_buf[j] * left_short_win[j];
+ }
+ for i in SHORT_WIN_POINT1..1024 {
+ let j = i - SHORT_WIN_POINT0;
+ dst[i] = self.ew_buf[j];
+ }
+ },
+ LONG_STOP_SEQUENCE => {
+ for i in 0..SHORT_WIN_POINT0 {
+ dst[i] = delay[i];
+ }
+ for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 {
+ dst[i] = delay[i] + self.tmp[i] * left_short_win[i - SHORT_WIN_POINT0];
+ }
+ for i in SHORT_WIN_POINT1..1024 {
+ dst[i] = self.tmp[i];
+ }
+ },
+ _ => unreachable!(""),
+ };
+ // save delay
+ match seq {
+ ONLY_LONG_SEQUENCE | LONG_STOP_SEQUENCE => {
+ for i in 0..1024 {
+ delay[i] = self.tmp[i + 1024] * long_win[1023 - i];
+ }
+ },
+ EIGHT_SHORT_SEQUENCE => {
+ for i in 0..SHORT_WIN_POINT1 { // last part is already windowed
+ delay[i] = self.ew_buf[i + 512+64];
+ }
+ for i in SHORT_WIN_POINT1..1024 {
+ delay[i] = 0.0;
+ }
+ },
+ LONG_START_SEQUENCE => {
+ for i in 0..SHORT_WIN_POINT0 {
+ delay[i] = self.tmp[i + 1024];
+ }
+ for i in SHORT_WIN_POINT0..SHORT_WIN_POINT1 {
+ delay[i] = self.tmp[i + 1024] * short_win[127 - (i - SHORT_WIN_POINT0)];
+ }
+ for i in SHORT_WIN_POINT1..1024 {
+ delay[i] = 0.0;
+ }
+ },
+ _ => unreachable!(""),
+ };
+ }
+}
+
+struct AACDecoder {
+ info: NACodecInfoRef,
+ chmap: NAChannelMap,
+ m4ainfo: M4AInfo,
+ pairs: Vec<ChannelPair>,
+ codebooks: Codebooks,
+ dsp: DSP,
+ sbinfo: GASubbandInfo,
+}
+
+impl AACDecoder {
+ fn new() -> Self {
+ AACDecoder {
+ info: NACodecInfo::new_dummy(),
+ chmap: NAChannelMap::new(),
+ m4ainfo: M4AInfo::new(),
+ pairs: Vec::new(),
+ codebooks: Codebooks::new(),
+ dsp: DSP::new(),
+ sbinfo: AAC_SUBBAND_INFO[0],
+ }
+ }
+ fn set_pair(&mut self, pair_no: usize, channel: usize, pair: bool) -> DecoderResult<()> {
+ if self.pairs.len() <= pair_no {
+ self.pairs.push(ChannelPair::new(pair, channel, self.sbinfo));
+ } else {
+ validate!(self.pairs[pair_no].channel == channel);
+ validate!(self.pairs[pair_no].pair == pair);
+ }
+ validate!(if pair { channel + 1 } else { channel } < self.m4ainfo.channels);
+ Ok(())
+ }
+ fn decode_ga(&mut self, br: &mut BitReader, abuf: &mut NABufferType) -> DecoderResult<()> {
+ let mut cur_pair = 0;
+ let mut cur_ch = 0;
+ while br.left() > 3 {
+ let id = br.read(3)?;
+ match id {
+ 0 => { // ID_SCE
+ let _tag = br.read(4)?;
+ self.set_pair(cur_pair, cur_ch, false)?;
+ self.pairs[cur_pair].decode_ga_sce(br, &self.codebooks, self.m4ainfo.otype)?;
+ cur_pair += 1;
+ cur_ch += 1;
+ },
+ 1 => { // ID_CPE
+ let _tag = br.read(4)?;
+ self.set_pair(cur_pair, cur_ch, true)?;
+ self.pairs[cur_pair].decode_ga_cpe(br, &self.codebooks, self.m4ainfo.otype)?;
+ cur_pair += 1;
+ cur_ch += 2;
+ },
+ 2 => { // ID_CCE
+ unimplemented!("coupling channel element");
+ },
+ 3 => { // ID_LFE
+ let _tag = br.read(4)?;
+ self.set_pair(cur_pair, cur_ch, false)?;
+ self.pairs[cur_pair].decode_ga_sce(br, &self.codebooks, self.m4ainfo.otype)?;
+ cur_pair += 1;
+ cur_ch += 1;
+ },
+ 4 => { // ID_DSE
+ let _id = br.read(4)?;
+ let align = br.read_bool()?;
+ let mut count = br.read(8)? as u32;
+ if count == 255 { count += br.read(8)? as u32; }
+ if align { br.align(); }
+ br.skip(count * 8)?; // no SBR payload or such
+ },
+ 5 => { // ID_PCE
+ unimplemented!("program config");
+ },
+ 6 => { // ID_FIL
+ let mut count = br.read(4)? as usize;
+ if count == 15 {
+ count += br.read(8)? as usize;
+ count -= 1;
+ }
+ for _ in 0..count {
+ // ext payload
+ br.skip(8)?;
+ }
+ },
+ 7 => { // ID_TERM
+ break;
+ },
+ _ => { unreachable!(); },
+ };
+ }
+ let srate_idx = GASubbandInfo::find_idx(self.m4ainfo.srate);
+ for pair in 0..cur_pair {
+ self.pairs[pair].synth_audio(&mut self.dsp, abuf, srate_idx);
+ }
+ Ok(())
+ }
+}
+
+impl NADecoder for AACDecoder {
+ fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
+ if let NACodecTypeInfo::Audio(_) = info.get_properties() {
+ let edata = info.get_extradata().unwrap();
+ validate!(edata.len() >= 2);
+
+//print!("edata:"); for s in edata.iter() { print!(" {:02X}", *s);}println!("");
+ if (edata.len() > 12) && (&edata[4..8] == b"esds") {
+ let mut mr = MemoryReader::new_read(edata.as_slice());
+ let mut br = ByteReader::new(&mut mr);
+ let esds_size = br.read_u32be()? as usize;
+ validate!(esds_size <= edata.len());
+ br.read_skip(8)?;
+ let mut info_start = 0;
+ let mut info_size = 0;
+ while br.tell() < (esds_size as u64) {
+ let tag = br.read_byte()?;
+ let mut size = 0;
+ loop {
+ let b = br.read_byte()?;
+ size = (size << 7) | u64::from(b & 0x7F);
+ validate!(br.tell() + size <= (esds_size as u64));
+ if (b & 0x80) == 0 {
+ break;
+ }
+ }
+ match tag {
+ 3 => {
+ br.read_u16be()?;
+ let flags = br.read_byte()?;
+ if (flags & 0x80) != 0 {
+ br.read_u16be()?;
+ }
+ if (flags & 0x40) != 0 {
+ let len = br.read_byte()?;
+ br.read_skip(len as usize)?;
+ }
+ if (flags & 0x20) != 0 {
+ br.read_u16be()?;
+ }
+ },
+ 4 => {
+ let _otype = br.read_byte()?;
+ let _stype = br.read_byte()?;
+ let _flags = br.read_u24be()?;
+ let _max_br = br.read_u32be()?;
+ let _min_br = br.read_u32be()?;
+ },
+ 5 => {
+ info_start = br.tell() as usize;
+ info_size = size as usize;
+ break;
+ },
+ _ => br.read_skip(size as usize)?,
+ }
+ }
+ validate!(info_start > 0 && info_size > 0);
+ self.m4ainfo.read(&edata[info_start..][..info_size])?;
+ } else {
+ self.m4ainfo.read(&edata)?;
+ }
+
+ //println!("{}", self.m4ainfo);
+ if (self.m4ainfo.otype != M4AType::LC) || (self.m4ainfo.channels > 2) || (self.m4ainfo.samples != 1024) {
+ return Err(DecoderError::NotImplemented);
+ }
+ self.sbinfo = GASubbandInfo::find(self.m4ainfo.srate);
+
+ let ainfo = NAAudioInfo::new(self.m4ainfo.srate, self.m4ainfo.channels as u8,
+ SND_F32P_FORMAT, self.m4ainfo.samples);
+ self.info = info.replace_info(NACodecTypeInfo::Audio(ainfo));
+
+ if self.m4ainfo.channels >= DEFAULT_CHANNEL_MAP.len() {
+ return Err(DecoderError::NotImplemented);
+ }
+ let chmap_str = DEFAULT_CHANNEL_MAP[self.m4ainfo.channels];
+ if chmap_str.is_empty() { return Err(DecoderError::NotImplemented); }
+ self.chmap = NAChannelMap::from_str(chmap_str).unwrap();
+
+ Ok(())
+ } else {
+ Err(DecoderError::InvalidData)
+ }
+ }
+ fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
+ let info = pkt.get_stream().get_info();
+ validate!(info.get_properties().is_audio());
+ let pktbuf = pkt.get_buffer();
+
+ let ainfo = self.info.get_properties().get_audio_info().unwrap();
+ let mut abuf = alloc_audio_buffer(ainfo, self.m4ainfo.samples, self.chmap.clone())?;
+
+ let mut br = BitReader::new(&pktbuf, BitReaderMode::BE);
+ match self.m4ainfo.otype {
+ M4AType::LC => {
+ self.decode_ga(&mut br, &mut abuf)?;
+ },
+ _ => { unimplemented!(""); }
+ }
+
+ let mut frm = NAFrame::new_from_pkt(pkt, self.info.replace_info(NACodecTypeInfo::Audio(ainfo)), abuf);
+ frm.set_keyframe(true);
+ Ok(frm.into_ref())
+ }
+ fn flush(&mut self) {
+ for pair in self.pairs.iter_mut() {
+ pair.ics[0].delay = [0.0; 1024];
+ pair.ics[1].delay = [0.0; 1024];
+ }
+ }
+}
+
+impl NAOptionHandler for AACDecoder {
+ fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
+ fn set_options(&mut self, _options: &[NAOption]) { }
+ fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
+}
+
+pub fn get_decoder() -> Box<dyn NADecoder + Send> {
+ Box::new(AACDecoder::new())
+}
+
+#[cfg(test)]
+mod test {
+ use nihav_core::codecs::RegisteredDecoders;
+ use nihav_core::demuxers::RegisteredDemuxers;
+ use nihav_codec_support::test::dec_video::test_decode_audio;
+ use crate::mpeg_register_all_decoders;
+ use nihav_realmedia::realmedia_register_all_demuxers;
+ #[test]
+ fn test_aac() {
+ let mut dmx_reg = RegisteredDemuxers::new();
+ realmedia_register_all_demuxers(&mut dmx_reg);
+ let mut dec_reg = RegisteredDecoders::new();
+ mpeg_register_all_decoders(&mut dec_reg);
+
+// let file = "assets/RV/rv40_weighted_mc.rmvb";
+ let file = "assets/RV/rv40_weighted_mc_2.rmvb";
+ test_decode_audio("realmedia", file, Some(12000), None/*Some("aac")*/, &dmx_reg, &dec_reg);
+ }
+}
+
+const DEFAULT_CHANNEL_MAP: [&str; 9] = [
+ "",
+ "C",
+ "L,R",
+ "C,L,R",
+ "C,L,R,Cs",
+ "C,L,R,Ls,Rs",
+ "C,L,R,Ls,Rs,LFE",
+ "",
+ "C,L,R,Ls,Rs,Lss,Rss,LFE",
+];
--- /dev/null
+const SWB_OFFSET_48K_LONG: [usize; 49+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 28,
+ 32, 36, 40, 48, 56, 64, 72, 80,
+ 88, 96, 108, 120, 132, 144, 160, 176,
+ 196, 216, 240, 264, 292, 320, 352, 384,
+ 416, 448, 480, 512, 544, 576, 608, 640,
+ 672, 704, 736, 768, 800, 832, 864, 896,
+ 928, 1024
+];
+const SWB_OFFSET_48K_SHORT: [usize; 14+1] = [
+ 0, 4, 8, 12, 16, 20, 28, 36, 44, 56, 68, 80, 96, 112, 128
+];
+const SWB_OFFSET_32K_LONG: [usize; 51+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 28,
+ 32, 36, 40, 48, 56, 64, 72, 80,
+ 88, 96, 108, 120, 132, 144, 160, 176,
+ 196, 216, 240, 264, 292, 320, 352, 384,
+ 416, 448, 480, 512, 544, 576, 608, 640,
+ 672, 704, 736, 768, 800, 832, 864, 896,
+ 928, 960, 992, 1024
+];
+const SWB_OFFSET_8K_LONG: [usize; 40+1] = [
+ 0, 12, 24, 36, 48, 60, 72, 84,
+ 96, 108, 120, 132, 144, 156, 172, 188,
+ 204, 220, 236, 252, 268, 288, 308, 328,
+ 348, 372, 396, 420, 448, 476, 508, 544,
+ 580, 620, 664, 712, 764, 820, 880, 944,
+ 1024
+];
+const SWB_OFFSET_8K_SHORT: [usize; 15+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 60, 72, 88, 108, 128
+];
+const SWB_OFFSET_16K_LONG: [usize; 43+1] = [
+ 0, 8, 16, 24, 32, 40, 48, 56,
+ 64, 72, 80, 88, 100, 112, 124, 136,
+ 148, 160, 172, 184, 196, 212, 228, 244,
+ 260, 280, 300, 320, 344, 368, 396, 424,
+ 456, 492, 532, 572, 616, 664, 716, 772,
+ 832, 896, 960, 1024
+];
+const SWB_OFFSET_16K_SHORT: [usize; 15+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 60, 72, 88, 108, 128
+];
+const SWB_OFFSET_24K_LONG: [usize; 47+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 28,
+ 32, 36, 40, 44, 52, 60, 68, 76,
+ 84, 92, 100, 108, 116, 124, 136, 148,
+ 160, 172, 188, 204, 220, 240, 260, 284,
+ 308, 336, 364, 396, 432, 468, 508, 552,
+ 600, 652, 704, 768, 832, 896, 960, 1024
+];
+const SWB_OFFSET_24K_SHORT: [usize; 15+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 64, 76, 92, 108, 128
+];
+const SWB_OFFSET_64K_LONG: [usize; 47+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 28,
+ 32, 36, 40, 44, 48, 52, 56, 64,
+ 72, 80, 88, 100, 112, 124, 140, 156,
+ 172, 192, 216, 240, 268, 304, 344, 384,
+ 424, 464, 504, 544, 584, 624, 664, 704,
+ 744, 784, 824, 864, 904, 944, 984, 1024
+];
+const SWB_OFFSET_64K_SHORT: [usize; 12+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
+];
+const SWB_OFFSET_96K_LONG: [usize; 41+1] = [
+ 0, 4, 8, 12, 16, 20, 24, 28,
+ 32, 36, 40, 44, 48, 52, 56, 64,
+ 72, 80, 88, 96, 108, 120, 132, 144,
+ 156, 172, 188, 212, 240, 276, 320, 384,
+ 448, 512, 576, 640, 704, 768, 832, 896,
+ 960, 1024
+];
+
+#[derive(Clone,Copy)]
+pub struct GASubbandInfo {
+ pub min_srate: u32,
+ pub long_bands: &'static [usize],
+ pub short_bands: &'static [usize],
+}
+
+impl GASubbandInfo {
+ pub fn find(srate: u32) -> GASubbandInfo {
+ for sbi in AAC_SUBBAND_INFO.iter() {
+ if srate >= sbi.min_srate {
+ return *sbi;
+ }
+ }
+ unreachable!("")
+ }
+ pub fn find_idx(srate: u32) -> usize {
+ for (i, sbi) in AAC_SUBBAND_INFO.iter().enumerate() {
+ if srate >= sbi.min_srate {
+ return i;
+ }
+ }
+ unreachable!("")
+ }
+}
+
+pub const AAC_SUBBAND_INFO: [GASubbandInfo; 12] = [
+ GASubbandInfo { min_srate: 92017, long_bands: &SWB_OFFSET_96K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //96K
+ GASubbandInfo { min_srate: 75132, long_bands: &SWB_OFFSET_96K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //88.2K
+ GASubbandInfo { min_srate: 55426, long_bands: &SWB_OFFSET_64K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //64K
+ GASubbandInfo { min_srate: 46009, long_bands: &SWB_OFFSET_48K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //48K
+ GASubbandInfo { min_srate: 37566, long_bands: &SWB_OFFSET_48K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //44.1K
+ GASubbandInfo { min_srate: 27713, long_bands: &SWB_OFFSET_32K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //32K
+ GASubbandInfo { min_srate: 23004, long_bands: &SWB_OFFSET_24K_LONG, short_bands: &SWB_OFFSET_24K_SHORT }, //24K
+ GASubbandInfo { min_srate: 18783, long_bands: &SWB_OFFSET_24K_LONG, short_bands: &SWB_OFFSET_24K_SHORT }, //22.05K
+ GASubbandInfo { min_srate: 13856, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //16K
+ GASubbandInfo { min_srate: 11502, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //12K
+ GASubbandInfo { min_srate: 9391, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //11.025K
+ GASubbandInfo { min_srate: 0, long_bands: &SWB_OFFSET_8K_LONG, short_bands: &SWB_OFFSET_8K_SHORT }, //8K
+];
--- /dev/null
+use nihav_core::codecs::{DecoderResult, DecoderError};
+use nihav_core::io::bitreader::*;
+use std::f32::consts;
+use super::MAX_WINDOWS;
+
+#[derive(Clone,Copy)]
+pub struct LTPData {
+}
+
+impl LTPData {
+ pub fn read(br: &mut BitReader) -> DecoderResult<Option<Self>> {
+ let predictor_data_present = br.read_bool()?;
+ if !predictor_data_present { return Ok(None); }
+unimplemented!("predictor data");
+/*
+ if is_main {
+ let predictor_reset = br.read_bool()?;
+ if predictor_reset {
+ let predictor_reset_group_number = br.read(5)?;
+ }
+ for sfb in 0..max_sfb.min(PRED_SFB_MAX) {
+ prediction_used[sfb] = br.read_bool()?;
+ }
+ } else {
+ let ltp_data_present = br.read_bool()?;
+ if ltp_data_present {
+ //ltp data
+ }
+ if common_window {
+ let ltp_data_present = br.read_bool()?;
+ if ltp_data_present {
+ //ltp data
+ }
+ }
+ }
+ Ok(Some(Self { }))
+*/
+ }
+}
+
+#[derive(Clone,Copy)]
+#[allow(dead_code)]
+pub struct PulseData {
+ pub number_pulse: usize,
+ pub pulse_start_sfb: usize,
+ pub pulse_offset: [u8; 4],
+ pub pulse_amp: [u8; 4],
+}
+
+impl PulseData {
+ pub fn read(br: &mut BitReader) -> DecoderResult<Option<Self>> {
+ let pulse_data_present = br.read_bool()?;
+ if !pulse_data_present { return Ok(None); }
+
+ let number_pulse = (br.read(2)? as usize) + 1;
+ let pulse_start_sfb = br.read(6)? as usize;
+ let mut pulse_offset: [u8; 4] = [0; 4];
+ let mut pulse_amp: [u8; 4] = [0; 4];
+ for i in 0..number_pulse {
+ pulse_offset[i] = br.read(5)? as u8;
+ pulse_amp[i] = br.read(4)? as u8;
+ }
+ Ok(Some(Self{ number_pulse, pulse_start_sfb, pulse_offset, pulse_amp }))
+ }
+}
+
+pub const TNS_MAX_ORDER: usize = 20;
+const TNS_MAX_LONG_BANDS: [usize; 12] = [ 31, 31, 34, 40, 42, 51, 46, 46, 42, 42, 42, 39 ];
+const TNS_MAX_SHORT_BANDS: [usize; 12] = [ 9, 9, 10, 14, 14, 14, 14, 14, 14, 14, 14, 14 ];
+
+#[derive(Clone,Copy)]
+pub struct TNSCoeffs {
+ pub length: usize,
+ pub order: usize,
+ pub direction: bool,
+ pub compress: bool,
+ pub coef: [f32; TNS_MAX_ORDER + 1],
+}
+
+impl TNSCoeffs {
+ pub fn new() -> Self {
+ Self {
+ length: 0, order: 0, direction: false, compress: false, coef: [0.0; TNS_MAX_ORDER + 1],
+ }
+ }
+ pub fn read(&mut self, br: &mut BitReader, long_win: bool, coef_res: bool, max_order: usize) -> DecoderResult<()> {
+ self.length = br.read(if long_win { 6 } else { 4 })? as usize;
+ self.order = br.read(if long_win { 5 } else { 3 })? as usize;
+ validate!(self.order <= max_order);
+ if self.order > 0 {
+ self.direction = br.read_bool()?;
+ self.compress = br.read_bool()?;
+ let mut coef_bits = 3;
+ if coef_res { coef_bits += 1; }
+ if self.compress { coef_bits -= 1; }
+ let sign_mask = 1 << (coef_bits - 1);
+ let neg_mask = !(sign_mask * 2 - 1);
+
+ let fac_base = if coef_res { 1 << 3 } else { 1 << 2 } as f32;
+ let iqfac = (fac_base - 0.5) / (consts::PI / 2.0);
+ let iqfac_m = (fac_base + 0.5) / (consts::PI / 2.0);
+ let mut tmp: [f32; TNS_MAX_ORDER] = [0.0; TNS_MAX_ORDER];
+ for el in tmp.iter_mut().take(self.order) {
+ let val = br.read(coef_bits)? as i8;
+ let c = f32::from(if (val & sign_mask) != 0 { val | neg_mask } else { val });
+ *el = (if c >= 0.0 { c / iqfac } else { c / iqfac_m }).sin();
+ }
+ // convert to LPC coefficients
+ let mut b: [f32; TNS_MAX_ORDER + 1] = [0.0; TNS_MAX_ORDER + 1];
+ for m in 1..=self.order {
+ for i in 1..m {
+ b[i] = self.coef[i - 1] + tmp[m - 1] * self.coef[m - i - 1];
+ }
+ for i in 1..m {
+ self.coef[i - 1] = b[i];
+ }
+ self.coef[m - 1] = tmp[m - 1];
+ }
+ }
+ Ok(())
+ }
+}
+
+#[derive(Clone,Copy)]
+#[allow(dead_code)]
+pub struct TNSData {
+ pub n_filt: [usize; MAX_WINDOWS],
+ coef_res: [bool; MAX_WINDOWS],
+ pub coeffs: [[TNSCoeffs; 4]; MAX_WINDOWS],
+}
+
+impl TNSData {
+ pub fn read(br: &mut BitReader, long_win: bool, num_windows: usize, max_order: usize) -> DecoderResult<Option<Self>> {
+ let tns_data_present = br.read_bool()?;
+ if !tns_data_present { return Ok(None); }
+ let mut n_filt: [usize; MAX_WINDOWS] = [0; MAX_WINDOWS];
+ let mut coef_res: [bool; MAX_WINDOWS] = [false; MAX_WINDOWS];
+ let mut coeffs: [[TNSCoeffs; 4]; MAX_WINDOWS] = [[TNSCoeffs::new(); 4]; MAX_WINDOWS];
+ for w in 0..num_windows {
+ n_filt[w] = br.read(if long_win { 2 } else { 1 })? as usize;
+ if n_filt[w] != 0 {
+ coef_res[w] = br.read_bool()?;
+ }
+ for filt in 0..n_filt[w] {
+ coeffs[w][filt].read(br, long_win, coef_res[w], max_order)?;
+ }
+ }
+ Ok(Some(Self { n_filt, coef_res, coeffs }))
+ }
+ pub fn apply(&self, coeffs: &mut [f32; 1024], w: usize, f: usize, start: usize, end: usize) {
+ let order = self.coeffs[w][f].order;
+ let lpc = &self.coeffs[w][f].coef;
+ let mut state = [0.0f32; 64];
+ let mut sidx = 32;
+ if !self.coeffs[w][f].direction {
+ for m in start..end {
+ for i in 0..order {
+ coeffs[m] -= state[(sidx + i) & 63] * lpc[i];
+ }
+ sidx = (sidx + 63) & 63;
+ state[sidx] = coeffs[m];
+ }
+ } else {
+ for m in (start..end).rev() {
+ for i in 0..order {
+ coeffs[m] -= state[(sidx + i) & 63] * lpc[i];
+ }
+ sidx = (sidx + 63) & 63;
+ state[sidx] = coeffs[m];
+ }
+ }
+ }
+ pub fn get_max_bands(long_win: bool, srate_idx: usize) -> usize {
+ if long_win {
+ TNS_MAX_LONG_BANDS[srate_idx]
+ } else {
+ TNS_MAX_SHORT_BANDS[srate_idx]
+ }
+ }
+}
+
+#[derive(Clone,Copy)]
+#[allow(dead_code)]
+pub struct GainControlData {
+ max_band: u8,
+}
+
+impl GainControlData {
+ pub fn read(br: &mut BitReader) -> DecoderResult<Option<Self>> {
+ let gain_control_data_present = br.read_bool()?;
+ if !gain_control_data_present { return Ok(None); }
+unimplemented!("gain control data");
+/* self.max_band = br.read(2)? as u8;
+ if window_sequence == ONLY_LONG_SEQUENCE {
+ for bd in 0..max_band
+...
+ }
+ Ok(Some(Self { }))*/
+ }
+}
projects / nihav.git / commitdiff