From: Kostya Shishkov Date: Sat, 27 Oct 2018 16:58:53 +0000 (+0200) Subject: AAC-LC decoder X-Git-Url: https://git.nihav.org/?p=nihav.git;a=commitdiff_plain;h=5a932f64889344148f6264c9928fece7fd0b68bb AAC-LC decoder --- diff --git a/Cargo.toml b/Cargo.toml index d1fbd67..a243794 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -38,10 +38,11 @@ all_audio_decoders = ["decoder_pcm", "decoder_imc", "decoders_real"] decoder_pcm = ["decoders"] decoder_ts102366 = ["decoders", "fft"] decoder_imc = ["decoders", "fft", "dsp_window"] -decoders_real = ["decoder_realaudio144", "decoder_realaudio288", "decoder_sipro", "decoder_ts102366", "decoder_cook", "decoder_atrac3", "decoder_ralf"] +decoders_real = ["decoder_realaudio144", "decoder_realaudio288", "decoder_sipro", "decoder_ts102366", "decoder_cook", "decoder_atrac3", "decoder_aac", "decoder_ralf"] decoder_realaudio144 = ["decoders"] decoder_realaudio288 = ["decoders"] decoder_sipro = ["decoders"] decoder_cook = ["decoders", "fft", "mdct"] decoder_atrac3 = ["decoders", "mdct"] +decoder_aac = ["decoders", "mdct", "dsp_window"] decoder_ralf = ["decoders"] diff --git a/src/codecs/aac.rs b/src/codecs/aac.rs new file mode 100644 index 0000000..9bf215c --- /dev/null +++ b/src/codecs/aac.rs @@ -0,0 +1,1768 @@ +use formats::*; +use frame::*; +use codecs::*; +use dsp::fft::FFTMode; +use dsp::mdct::IMDCT; +use dsp::window::*; +use io::bitreader::*; +use io::codebook::*; +use std::fmt; +use 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 { + 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 { + 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 { + 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, src.len(), 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, + 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 => { + validate!((self.window_sequence == ONLY_LONG_SEQUENCE) || + (self.window_sequence == LONG_START_SEQUENCE)); + }, + LONG_START_SEQUENCE | EIGHT_SHORT_SEQUENCE => { + validate!((self.window_sequence == EIGHT_SHORT_SEQUENCE) || + (self.window_sequence == LONG_STOP_SEQUENCE)); + }, + _ => {}, + }; + 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> { + 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> { + 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 i in 0..self.order { + let val = br.read(coef_bits)? as i8; + let c = if (val & sign_mask) != 0 { val | neg_mask } else { val } as f32; + tmp[i] = (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 + 1) { + 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> { + 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> { + 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, + spec_cb: [Codebook; 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 mut spec_cb: [Codebook; 11]; + unsafe { + spec_cb = mem::uninitialized(); + 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 spec_cb[i], Codebook::new(&mut coderead, CodebookMode::MSB).unwrap()); + } + } + Self { scale_cb, spec_cb } + } +} + +#[derive(Clone)] +struct ICS { + global_gain: u8, + info: ICSInfo, + pulse_data: Option, + tns_data: Option, + gain_control: Option, + 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 = self.global_gain as i16; + 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 = br.read_cb(&codebooks.scale_cb)? as i16; + 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 + (self.global_gain as i16) - 90; + } else { + scf_noise += br.read_cb(&codebooks.scale_cb)? as i16; + } + 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 += br.read_cb(&codebooks.scale_cb)? as i16; + 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 += pdata.pulse_amp[pno] as f32; + } else { + base -= pdata.pulse_amp[pno] as f32; + } + 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; + if !tns_data.coeffs[w][f].direction { + for m in start..end { + for i in 0..order.min(m) { + self.coeffs[m] -= self.coeffs[m - i - 1] * lpc[i]; + } + } + } else { + for m in (start..end).rev() { + for i in 0..order.min(m) { + self.coeffs[m] -= self.coeffs[m + i - 1] * lpc[i]; + } + } + } + } + } + } + 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 * ((scale as f32) - 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, 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(-val as f32) * scale; + } else { + out[i] = iquant( val as f32) * scale; + } + } + } + } else { + for i in 0..4 { + out[i] = iquant((AAC_QUADS[cw][i] - 1) as f32) * scale; + } + } + } + Ok(()) +} +fn decode_pairs(br: &mut BitReader, cb: &Codebook, 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(x as f32) * scale; + out[1] = iquant(y as f32) * scale; + } + Ok(()) +} +fn read_escape(br: &mut BitReader, sign: bool) -> DecoderResult { + let prefix = br.read_code(UintCodeType::UnaryOnes)? as u8; + validate!(prefix < 9); + let bits = br.read(prefix + 4)? as i16; + 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, false)?; + 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 * ((self.ics[0].scales[g][sfb] as f32) + (INTENSITY_SCALE_MIN as f32))); + 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 mut output = adata.get_data_mut(); + 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(FFTMode::SplitRadix, 1024 * 2, true), + imdct_short: IMDCT::new(FFTMode::SplitRadix, 128 * 2, true), + tmp: [0.0; 2048], ew_buf: [0.0; 1152], + } + } + 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: Rc, + chmap: NAChannelMap, + m4ainfo: M4AInfo, + pairs: Vec, + 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, info: Rc) -> 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!(""); + 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.len() == 0 { return Err(DecoderError::NotImplemented); } + self.chmap = NAChannelMap::from_str(chmap_str).unwrap(); + + Ok(()) + } else { + Err(DecoderError::InvalidData) + } + } + fn decode(&mut self, pkt: &NAPacket) -> DecoderResult { + 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, pktbuf.len(), 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(Rc::new(RefCell::new(frm))) + } +} + +pub fn get_decoder() -> Box { + Box::new(AACDecoder::new()) +} + +#[cfg(test)] +mod test { + use test::dec_video::*; + #[test] + fn test_aac() { +// let file = "assets/RV/rv40_weighted_mc.rmvb"; + let file = "assets/RV/rv40_weighted_mc_2.rmvb"; + test_decode_audio("realmedia", file, Some(12000), "aac"); + } +} + +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 i in 0..AAC_SUBBAND_INFO.len() { + if srate >= AAC_SUBBAND_INFO[i].min_srate { + return AAC_SUBBAND_INFO[i]; + } + } + unreachable!("") + } + fn find_idx(srate: u32) -> usize { + for i in 0..AAC_SUBBAND_INFO.len() { + if srate >= AAC_SUBBAND_INFO[i].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 +]; diff --git a/src/codecs/mod.rs b/src/codecs/mod.rs index 057542a..daf53fa 100644 --- a/src/codecs/mod.rs +++ b/src/codecs/mod.rs @@ -249,6 +249,8 @@ mod h263; #[cfg(any(feature="decoder_realvideo3", feature="decoder_realvideo4", feature="decoder_realvideo6", feature="decoder_realaudio144", feature="decoder_realaudio288", feature="decoder_cook", feature="decoder_ralf"))] mod real; +#[cfg(feature="decoder_aac")] +mod aac; #[cfg(feature="decoder_atrac3")] mod atrac3; #[cfg(feature="decoder_pcm")] @@ -304,6 +306,8 @@ const DECODERS: &[DecoderInfo] = &[ DecoderInfo { name: "cook", get_decoder: real::cook::get_decoder }, #[cfg(feature="decoder_atrac3")] DecoderInfo { name: "atrac3", get_decoder: atrac3::get_decoder }, +#[cfg(feature="decoder_aac")] + DecoderInfo { name: "aac", get_decoder: aac::get_decoder }, #[cfg(feature="decoder_ralf")] DecoderInfo { name: "ralf", get_decoder: real::ralf::get_decoder }, ];