-use nihav_core::codecs::*;
-use nihav_core::io::bitreader::*;
-use std::str::FromStr;
-use std::sync::Arc;
+//! Quadrature Mirror Filter used in various audio codecs like MPEG Audio.
-const CODEC_SAMPLES: usize = 1152;
-
-struct QMF {
+///! 32-band QMF.
+pub struct QMF {
hist: [f32; 1024],
pos: usize,
}
}
impl QMF {
- fn new() -> Self {
+ ///! Constructs a new `QMF` context.
+ pub fn new() -> Self {
Self {
hist: [0.0; 1024],
pos: 0,
}
}
- fn synth(&mut self, src: &[f32; 32], dst: &mut [f32]) {
+ ///! Performs reconstruction of audio from provided sub-band samples.
+ pub fn synth(&mut self, src: &[f32; 32], dst: &mut [f32]) {
self.pos = self.pos.wrapping_sub(32) & 0x1FF;
dct32(src, &mut self.hist[self.pos..][..32]);
dst[i] = acc;
}
}
-}
-
-struct LHDecoder {
- ainfo: NAAudioInfo,
- info: Arc<NACodecInfo>,
- chmap: NAChannelMap,
-
- bitalloc: [[u8; 32]; 3],
- scf_select: [u8; 32],
- scales: [[u8; 32]; 3],
- samples: [[f32; 32]; 36],
-
- bitpos: u32,
-
- qmf: QMF,
-}
-
-impl LHDecoder {
- fn new() -> Self {
- Self {
- ainfo: NAAudioInfo::new(22050, 1, SND_F32P_FORMAT, CODEC_SAMPLES),
- info: NACodecInfo::new_dummy(),
- chmap: NAChannelMap::new(),
-
- bitalloc: [[0; 32]; 3],
- scf_select: [0; 32],
- scales: [[0; 32]; 3],
- samples: [[0.0; 32]; 36],
-
- bitpos: 0,
-
- qmf: QMF::new(),
- }
- }
- fn unpack_bitalloc(&mut self, br: &mut BitReader) -> DecoderResult<()> {
- for i in 0..3 {
- for sb in 0..32 {
- self.bitalloc[i][sb] = br.read(BITALLOC_INFO[sb])? as u8;
- }
- }
- Ok(())
- }
- fn unpack_scales(&mut self, br: &mut BitReader) -> DecoderResult<()> {
- for sb in 0..32 {
- if (self.bitalloc[0][sb] | self.bitalloc[1][sb] | self.bitalloc[2][sb]) != 0 {
- self.scf_select[sb] = br.read(2)? as u8;
- } else {
- self.scf_select[sb] = 0;
- }
- }
-
- self.scales = [[0; 32]; 3];
- for sb in 0..32 {
- let ba0 = self.bitalloc[0][sb];
- let ba1 = self.bitalloc[1][sb];
- let ba2 = self.bitalloc[2][sb];
- if (ba0 | ba1 | ba2) == 0 {
- continue;
- }
- match self.scf_select[sb] {
- 0 => {
- for j in 0..3 {
- if self.bitalloc[j][sb] != 0 {
- self.scales[j][sb] = br.read(6)? as u8;
- }
- }
- },
- 1 => {
- if (ba0 | ba1) != 0 {
- let scale = br.read(6)? as u8;
- self.scales[0][sb] = scale;
- self.scales[1][sb] = scale;
- }
- if ba2 != 0 {
- self.scales[2][sb] = br.read(6)? as u8;
- }
- },
- 2 => {
- let scale = br.read(6)? as u8;
- self.scales[0][sb] = scale;
- self.scales[1][sb] = scale;
- self.scales[2][sb] = scale;
- },
- _ => {
- if ba0 != 0 {
- self.scales[0][sb] = br.read(6)? as u8;
- }
- if (ba1 | ba2) != 0 {
- let scale = br.read(6)? as u8;
- self.scales[1][sb] = scale;
- self.scales[2][sb] = scale;
- }
- },
- };
- }
- Ok(())
- }
- #[allow(clippy::identity_op)]
- fn unpack_samples(&mut self, br: &mut BitReader) -> DecoderResult<()> {
- for grp in 0..3 {
- for gr in 0..4 {
- for sb in 0..32 {
- let set = (grp * 4 + gr) * 3;
- if self.bitalloc[grp][sb] == 0 {
- self.samples[set + 0][sb] = 0.0;
- self.samples[set + 1][sb] = 0.0;
- self.samples[set + 2][sb] = 0.0;
- continue;
- }
- let idx = sb * 4 + (self.bitalloc[grp][sb] as usize);
- let bits = GROUP_BITS[idx];
- let sf = SCALEFACTORS[self.scales[grp][sb] as usize];
- if GROUP_INFO[idx] == 1 {
- let radix = (1 << bits) - 1;
- let val0 = br.read(bits)? as usize;
- let val1 = br.read(bits)? as usize;
- let val2 = br.read(bits)? as usize;
- self.samples[set + 0][sb] = Self::dequant(val0, idx, radix) * sf;
- self.samples[set + 1][sb] = Self::dequant(val1, idx, radix) * sf;
- self.samples[set + 2][sb] = Self::dequant(val2, idx, radix) * sf;
- } else {
- let radix = GROUP_RADIX[idx] as usize;
- let val = br.read(bits)? as usize;
- let val0 = val % radix;
- let val1 = (val / radix) % radix;
- let val2 = val / radix / radix;
- self.samples[set + 0][sb] = Self::dequant(val0, idx, radix) * sf;
- self.samples[set + 1][sb] = Self::dequant(val1, idx, radix) * sf;
- self.samples[set + 2][sb] = Self::dequant(val2, idx, radix) * sf;
- }
- }
- }
- }
- Ok(())
- }
- fn dequant(val: usize, idx: usize, radix: usize) -> f32 {
- let qval = match radix {
- 3 => QUANTS3[val],
- 5 => QUANTS5[val],
- 7 => QUANTS7[val],
- 15 => QUANTS15[val],
- 63 => QUANTS63[val],
- _ => unreachable!(),
- };
- let bias_idx = QUANT_BIAS_MAP[idx] as usize;
- (qval + QUANT_BIAS[bias_idx]) / QUANT_RANGE[bias_idx]
+ ///! Resets internal filter state.
+ pub fn reset(&mut self) {
+ self.hist = [0.0; 1024];
+ self.pos = 0;
}
}
-impl NADecoder for LHDecoder {
- fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
- if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
- self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), 1, SND_F32P_FORMAT, CODEC_SAMPLES);
- self.info = info.replace_info(NACodecTypeInfo::Audio(self.ainfo));
- self.chmap = NAChannelMap::from_str("C").unwrap();
- Ok(())
- } else {
- Err(DecoderError::InvalidData)
- }
- }
- fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
- let info = pkt.get_stream().get_info();
- if let NACodecTypeInfo::Audio(_) = info.get_properties() {
- let pktbuf = pkt.get_buffer();
-
- let mut daudio = Vec::with_capacity(CODEC_SAMPLES);
-
- let mut br = BitReader::new(pktbuf.as_slice(), BitReaderMode::BE);
- br.skip(self.bitpos)?;
-
- while br.left() >= 8 {
- self.unpack_bitalloc(&mut br)?;
- self.unpack_scales(&mut br)?;
- self.unpack_samples(&mut br)?;
-
- let mut samp_buf = [0.0f32; 32];
- for set in 0..36 {
- self.qmf.synth(&self.samples[set], &mut samp_buf);
- daudio.extend_from_slice(&samp_buf);
- }
- }
-
- self.bitpos = (br.tell() as u32) & 7;
-
- let abuf = alloc_audio_buffer(self.ainfo, daudio.len(), self.chmap.clone())?;
- let mut adata = abuf.get_abuf_f32().unwrap();
- let buf = adata.get_data_mut().unwrap();
- (&mut buf[..daudio.len()]).copy_from_slice(daudio.as_slice());
-
- let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), abuf);
- frm.set_duration(Some(CODEC_SAMPLES as u64));
- frm.set_keyframe(true);
- Ok(frm.into_ref())
- } else {
- Err(DecoderError::Bug)
- }
- }
- fn flush(&mut self) {
- self.qmf = QMF::new();
- self.bitpos = 0;
+impl Default for QMF {
+ fn default() -> Self {
+ Self::new()
}
}
-impl NAOptionHandler for LHDecoder {
- 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(LHDecoder::new())
-}
-
-const BITALLOC_INFO: [u8; 32] = [
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
-];
-
-const GROUP_BITS: [u8; 128] = [
- 0, 3, 4, 6, 0, 3, 4, 6, 0, 3, 4, 6, 0, 3, 4, 6,
- 0, 3, 4, 6, 0, 3, 4, 6, 0, 5, 7, 4, 0, 5, 7, 4,
- 0, 5, 7, 4, 0, 5, 7, 4, 0, 5, 7, 4, 0, 5, 7, 4,
- 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0,
- 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0,
- 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0,
- 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0,
- 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0
-];
-const GROUP_INFO: [u8; 128] = [
- 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1,
- 0, 1, 1, 1, 0, 1, 1, 1, 0, 3, 3, 1, 0, 3, 3, 1,
- 0, 3, 3, 1, 0, 3, 3, 1, 0, 3, 3, 1, 0, 3, 3, 1,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0
-];
-const GROUP_RADIX: [u8; 128] = [
- 0, 7, 15, 63, 0, 7, 15, 63, 0, 7, 15, 63, 0, 7, 15, 63,
- 0, 7, 15, 63, 0, 7, 15, 63, 0, 3, 5, 15, 0, 3, 5, 15,
- 0, 3, 5, 15, 0, 3, 5, 15, 0, 3, 5, 15, 0, 3, 5, 15,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0,
- 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0
-];
-
-const QUANT_BIAS_MAP: [u8; 128] = [
- 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6, 0, 2, 4, 6,
- 0, 2, 4, 6, 0, 2, 4, 6, 0, 0, 1, 4, 0, 0, 1, 4,
- 0, 0, 1, 4, 0, 0, 1, 4, 0, 0, 1, 4, 0, 0, 1, 4,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-];
-const QUANT_BIAS: [f32; 17] = [
- 0.5, 0.5, 0.25, 0.5, 0.125, 0.0625, 0.03125, 0.015625,
- 0.0078125, 0.00390625, 0.001953125, 0.0009765625, 0.00048828125,
- 0.00024414062, 0.00012207031, 0.000061035164, 0.000030517582
-];
-const QUANT_RANGE: [f32; 17] = [
- 0.75, 0.625, 0.875, 0.5625, 0.9375, 0.96875, 0.984375,
- 0.9921875, 0.99609375, 0.99804688, 0.99902344, 0.99951172,
- 0.99975586, 0.99987793, 0.99993896, 0.99996948, 0.99998474
-];
-const SCALEFACTORS: [f32; 64] = [
- 2.0, 1.587401, 1.2599211, 1.0, 0.79370052, 0.62996054,
- 0.5, 0.39685026, 0.31498027, 0.25, 0.19842513, 0.15749013,
- 0.125, 0.099212565, 0.078745067, 0.0625, 0.049606282, 0.039372534,
- 0.03125, 0.024803141, 0.019686267, 0.015625, 0.012401571, 0.0098431334,
- 0.0078125, 0.0062007853, 0.0049215667, 0.00390625, 0.0031003926, 0.0024607833,
- 0.001953125, 0.0015501963, 0.0012303917, 0.0009765625, 0.00077509816, 0.00061519584,
- 0.00048828125, 0.00038754908, 0.00030759792, 0.00024414062, 0.00019377454, 0.00015379896,
- 0.00012207031, 0.00009688727, 0.00007689948, 0.000061035156,
- 0.000048443635, 0.00003844974, 0.000030517578, 0.000024221818,
- 0.00001922487, 0.000015258789, 0.000012110909, 0.000009612435,
- 0.0000076293945, 0.0000060554544, 0.0000048062175, 0.0000038146973,
- 0.0000030277272, 0.0000024031087, 0.0000019073486, 0.0000015138636,
- 0.0000012015544, 9.9999997e-21
-];
-
-const QUANTS3: [f32; 4] = [ -1.0, -0.5, 0.0, 0.5 ];
-const QUANTS5: [f32; 6] = [ -1.0, -0.75, -0.5, -0.25, 0.0, 0.25 ];
-const QUANTS7: [f32; 8] = [ -1.0, -0.75, -0.5, -0.25, 0.0, 0.25, 0.5, 0.75 ];
-const QUANTS15: [f32; 16] = [
- -1.0, -0.875, -0.75, -0.625, -0.5, -0.375, -0.25, -0.125,
- 0.0, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875 ];
-const QUANTS63: [f32; 64] = [
- -1.0, -0.96875, -0.9375, -0.90625, -0.875, -0.84375, -0.8125, -0.78125,
- -0.75, -0.71875, -0.6875, -0.65625, -0.625, -0.59375, -0.5625, -0.53125,
- -0.5, -0.46875, -0.4375, -0.40625, -0.375, -0.34375, -0.3125, -0.28125,
- -0.25, -0.21875, -0.1875, -0.15625, -0.125, -0.09375, -0.0625, -0.03125,
- 0.0, 0.03125, 0.0625, 0.09375, 0.125, 0.15625, 0.1875, 0.21875,
- 0.25, 0.28125, 0.3125, 0.34375, 0.375, 0.40625, 0.4375, 0.46875,
- 0.5, 0.53125, 0.5625, 0.59375, 0.625, 0.65625, 0.6875, 0.71875,
- 0.75, 0.78125, 0.8125, 0.84375, 0.875, 0.90625, 0.9375, 0.96875 ];
-
const QMF_WINDOW: [f32; 512] = [
0.000000000, -0.000015259, -0.000015259, -0.000015259,
-0.000015259, -0.000015259, -0.000015259, -0.000030518,
use nihav_core::codecs::*;
use nihav_core::io::bitreader::*;
+use nihav_codec_support::dsp::qmf::QMF;
use std::str::FromStr;
use std::sync::Arc;
const CODEC_SAMPLES: usize = 1152;
-struct QMF {
- hist: [f32; 1024],
- pos: usize,
-}
-
-macro_rules! butterfly {
- (in; $src0: expr, $src1: expr, $dst0: expr, $dst1: expr, $scale: expr) => {
- $dst0 = $src0 + $src1;
- $dst1 = ($src0 - $src1) * $scale;
- };
- (rev; $a: expr, $b: expr) => {
- butterfly!(rev; $a, $b, std::f32::consts::FRAC_1_SQRT_2);
- };
- (rev; $a: expr, $b: expr, $scale: expr) => {
- let tmp = $a + $b;
- $b = ($a - $b) * $scale;
- $a = tmp;
- };
- (scal; $a: expr, $b: expr) => {
- butterfly!(scal; $a, $b, std::f32::consts::FRAC_1_SQRT_2);
- };
- (scal; $a: expr, $b: expr, $scale: expr) => {
- let tmp = $a + $b;
- $b = ($b - $a) * $scale;
- $a = tmp;
- };
-}
-
-macro_rules! postadd {
- ($tmp: expr, $a0: expr, $b0: expr, $c0: expr, $d0: expr, $a1: expr, $b1: expr, $c1: expr, $d1: expr) => {
- $tmp[$c0] += $tmp[$d0];
- $tmp[$c1] += $tmp[$d1];
- $tmp[$a1] += $tmp[$c1];
- $tmp[$c1] += $tmp[$b1];
- $tmp[$b1] += $tmp[$d1];
- }
-}
-
-fn dct32(src: &[f32; 32], dst: &mut [f32]) {
- let mut tmp = [0.0f32; 32];
-
- butterfly!(in; src[ 0], src[31], tmp[ 0], tmp[31], 0.50060299823519627);
- butterfly!(in; src[ 1], src[30], tmp[ 1], tmp[30], 0.50547095989754365);
- butterfly!(in; src[ 2], src[29], tmp[ 2], tmp[29], 0.51544730992262455);
- butterfly!(in; src[ 3], src[28], tmp[ 3], tmp[28], 0.53104259108978413);
- butterfly!(in; src[ 4], src[27], tmp[ 4], tmp[27], 0.55310389603444454);
- butterfly!(in; src[ 5], src[26], tmp[ 5], tmp[26], 0.58293496820613389);
- butterfly!(in; src[ 6], src[25], tmp[ 6], tmp[25], 0.62250412303566482);
- butterfly!(in; src[ 7], src[24], tmp[ 7], tmp[24], 0.67480834145500568);
- butterfly!(in; src[ 8], src[23], tmp[ 8], tmp[23], 0.74453627100229858);
- butterfly!(in; src[ 9], src[22], tmp[ 9], tmp[22], 0.83934964541552681);
- butterfly!(in; src[10], src[21], tmp[10], tmp[21], 0.97256823786196078);
- butterfly!(in; src[11], src[20], tmp[11], tmp[20], 1.1694399334328847);
- butterfly!(in; src[12], src[19], tmp[12], tmp[19], 1.4841646163141662);
- butterfly!(in; src[13], src[18], tmp[13], tmp[18], 2.0577810099534108);
- butterfly!(in; src[14], src[17], tmp[14], tmp[17], 3.407608418468719);
- butterfly!(in; src[15], src[16], tmp[15], tmp[16], 10.190008123548033);
- butterfly!(rev; tmp[ 0], tmp[15], 0.50241928618815568);
- butterfly!(rev; tmp[ 1], tmp[14], 0.52249861493968885);
- butterfly!(rev; tmp[ 2], tmp[13], 0.56694403481635769);
- butterfly!(rev; tmp[ 3], tmp[12], 0.64682178335999008);
- butterfly!(rev; tmp[ 4], tmp[11], 0.7881546234512502);
- butterfly!(rev; tmp[ 5], tmp[10], 1.0606776859903471);
- butterfly!(rev; tmp[ 6], tmp[ 9], 1.7224470982383342);
- butterfly!(rev; tmp[ 7], tmp[ 8], 5.1011486186891553);
- butterfly!(scal; tmp[16], tmp[31], 0.50241928618815568);
- butterfly!(scal; tmp[17], tmp[30], 0.52249861493968885);
- butterfly!(scal; tmp[18], tmp[29], 0.56694403481635769);
- butterfly!(scal; tmp[19], tmp[28], 0.64682178335999008);
- butterfly!(scal; tmp[20], tmp[27], 0.7881546234512502);
- butterfly!(scal; tmp[21], tmp[26], 1.0606776859903471);
- butterfly!(scal; tmp[22], tmp[25], 1.7224470982383342);
- butterfly!(scal; tmp[23], tmp[24], 5.1011486186891553);
- butterfly!(rev; tmp[ 0], tmp[ 7], 0.50979557910415918);
- butterfly!(rev; tmp[ 1], tmp[ 6], 0.60134488693504529);
- butterfly!(rev; tmp[ 2], tmp[ 5], 0.89997622313641557);
- butterfly!(rev; tmp[ 3], tmp[ 4], 2.5629154477415055);
- butterfly!(rev; tmp[16], tmp[23], 0.50979557910415918);
- butterfly!(rev; tmp[17], tmp[22], 0.60134488693504529);
- butterfly!(rev; tmp[18], tmp[21], 0.89997622313641557);
- butterfly!(rev; tmp[19], tmp[20], 2.5629154477415055);
- butterfly!(scal; tmp[ 8], tmp[15], 0.50979557910415918);
- butterfly!(scal; tmp[ 9], tmp[14], 0.60134488693504529);
- butterfly!(scal; tmp[10], tmp[13], 0.89997622313641557);
- butterfly!(scal; tmp[11], tmp[12], 2.5629154477415055);
- butterfly!(scal; tmp[24], tmp[31], 0.50979557910415918);
- butterfly!(scal; tmp[25], tmp[30], 0.60134488693504529);
- butterfly!(scal; tmp[26], tmp[29], 0.89997622313641557);
- butterfly!(scal; tmp[27], tmp[28], 2.5629154477415055);
- butterfly!(rev; tmp[ 0], tmp[ 3], 0.54119610014619701);
- butterfly!(rev; tmp[ 1], tmp[ 2], 1.3065629648763764);
- butterfly!(rev; tmp[ 8], tmp[11], 0.54119610014619701);
- butterfly!(rev; tmp[ 9], tmp[10], 1.3065629648763764);
- butterfly!(rev; tmp[16], tmp[19], 0.54119610014619701);
- butterfly!(rev; tmp[17], tmp[18], 1.3065629648763764);
- butterfly!(rev; tmp[24], tmp[27], 0.54119610014619701);
- butterfly!(rev; tmp[25], tmp[26], 1.3065629648763764);
- butterfly!(scal; tmp[ 4], tmp[ 7], 0.54119610014619701);
- butterfly!(scal; tmp[ 5], tmp[ 6], 1.3065629648763764);
- butterfly!(scal; tmp[12], tmp[15], 0.54119610014619701);
- butterfly!(scal; tmp[13], tmp[14], 1.3065629648763764);
- butterfly!(scal; tmp[20], tmp[23], 0.54119610014619701);
- butterfly!(scal; tmp[21], tmp[22], 1.3065629648763764);
- butterfly!(scal; tmp[28], tmp[31], 0.54119610014619701);
- butterfly!(scal; tmp[29], tmp[30], 1.3065629648763764);
- butterfly!(rev; tmp[ 0], tmp[ 1]);
- butterfly!(rev; tmp[ 4], tmp[ 5]);
- butterfly!(rev; tmp[ 8], tmp[ 9]);
- butterfly!(rev; tmp[12], tmp[13]);
- butterfly!(rev; tmp[16], tmp[17]);
- butterfly!(rev; tmp[20], tmp[21]);
- butterfly!(rev; tmp[24], tmp[25]);
- butterfly!(rev; tmp[28], tmp[29]);
- butterfly!(scal; tmp[ 2], tmp[ 3]);
- butterfly!(scal; tmp[ 6], tmp[ 7]);
- butterfly!(scal; tmp[10], tmp[11]);
- butterfly!(scal; tmp[14], tmp[15]);
- butterfly!(scal; tmp[18], tmp[19]);
- butterfly!(scal; tmp[22], tmp[23]);
- butterfly!(scal; tmp[26], tmp[27]);
- butterfly!(scal; tmp[30], tmp[31]);
-
- postadd!(tmp, 0, 1, 2, 3, 4, 5, 6, 7);
- postadd!(tmp, 8, 9, 10, 11, 12, 13, 14, 15);
- postadd!(tmp,16, 17, 18, 19, 20, 21, 22, 23);
- postadd!(tmp,24, 25, 26, 27, 28, 29, 30, 31);
-
- dst[ 0] = tmp[0];
- dst[16] = tmp[1];
- dst[ 8] = tmp[2];
- dst[24] = tmp[3];
- dst[ 4] = tmp[4];
- dst[20] = tmp[5];
- dst[12] = tmp[6];
- dst[28] = tmp[7];
-
- dst[ 2] = tmp[ 8] + tmp[12];
- dst[18] = tmp[ 9] + tmp[13];
- dst[10] = tmp[10] + tmp[14];
- dst[26] = tmp[11] + tmp[15];
-
- dst[ 6] = tmp[12] + tmp[10];
- dst[22] = tmp[13] + tmp[11];
-
- dst[14] = tmp[14] + tmp[ 9];
-
- dst[30] = tmp[15];
-
- tmp[24] += tmp[28];
- tmp[28] += tmp[26];
- tmp[26] += tmp[30];
- tmp[30] += tmp[25];
- tmp[25] += tmp[29];
- tmp[29] += tmp[27];
- tmp[27] += tmp[31];
-
- dst[ 1] = tmp[16] + tmp[24];
- dst[17] = tmp[17] + tmp[25];
- dst[ 9] = tmp[18] + tmp[26];
- dst[25] = tmp[19] + tmp[27];
- dst[ 5] = tmp[20] + tmp[28];
- dst[21] = tmp[21] + tmp[29];
- dst[13] = tmp[22] + tmp[30];
- dst[29] = tmp[23] + tmp[31];
-
- dst[ 3] = tmp[24] + tmp[20];
- dst[19] = tmp[25] + tmp[21];
- dst[11] = tmp[26] + tmp[22];
- dst[27] = tmp[27] + tmp[23];
-
- dst[ 7] = tmp[28] + tmp[18];
- dst[23] = tmp[29] + tmp[19];
-
- dst[15] = tmp[30] + tmp[17];
-
- dst[31] = tmp[31];
-}
-
-impl QMF {
- fn new() -> Self {
- Self {
- hist: [0.0; 1024],
- pos: 0,
- }
- }
- fn synth(&mut self, src: &[f32; 32], dst: &mut [f32]) {
- self.pos = self.pos.wrapping_sub(32) & 0x1FF;
- dct32(src, &mut self.hist[self.pos..][..32]);
-
- for i in 0..16 {
- let mut acc = 0.0;
- for j in (0..512).step_by(64) {
- acc += QMF_WINDOW[i + j] * self.hist[(j + 16 + i + self.pos) & 0x1FF];
- acc -= QMF_WINDOW[i + j + 32] * self.hist[(j + 16 + 32 - i + self.pos) & 0x1FF];
- }
- dst[i] = acc;
- }
- let mut acc = 0.0;
- for j in (0..512).step_by(64) {
- acc -= QMF_WINDOW[j + 32 + 16] * self.hist[(j + 32 + self.pos) & 0x1FF];
- }
- dst[16] = acc;
- for i in 17..32 {
- let mut acc = 0.0;
- for j in (0..512).step_by(64) {
- acc -= QMF_WINDOW[i + j] * self.hist[(j + 32 + 16 - i + self.pos) & 0x1FF];
- acc -= QMF_WINDOW[i + j + 32] * self.hist[(j + 32 - 16 + i + self.pos) & 0x1FF];
- }
- dst[i] = acc;
- }
- }
-}
-
struct LHDecoder {
ainfo: NAAudioInfo,
info: Arc<NACodecInfo>,
0.5, 0.53125, 0.5625, 0.59375, 0.625, 0.65625, 0.6875, 0.71875,
0.75, 0.78125, 0.8125, 0.84375, 0.875, 0.90625, 0.9375, 0.96875 ];
-const QMF_WINDOW: [f32; 512] = [
- 0.000000000, -0.000015259, -0.000015259, -0.000015259,
- -0.000015259, -0.000015259, -0.000015259, -0.000030518,
- -0.000030518, -0.000030518, -0.000030518, -0.000045776,
- -0.000045776, -0.000061035, -0.000061035, -0.000076294,
- -0.000076294, -0.000091553, -0.000106812, -0.000106812,
- -0.000122070, -0.000137329, -0.000152588, -0.000167847,
- -0.000198364, -0.000213623, -0.000244141, -0.000259399,
- -0.000289917, -0.000320435, -0.000366211, -0.000396729,
- -0.000442505, -0.000473022, -0.000534058, -0.000579834,
- -0.000625610, -0.000686646, -0.000747681, -0.000808716,
- -0.000885010, -0.000961304, -0.001037598, -0.001113892,
- -0.001205444, -0.001296997, -0.001388550, -0.001480103,
- -0.001586914, -0.001693726, -0.001785278, -0.001907349,
- -0.002014160, -0.002120972, -0.002243042, -0.002349854,
- -0.002456665, -0.002578735, -0.002685547, -0.002792358,
- -0.002899170, -0.002990723, -0.003082275, -0.003173828,
- 0.003250122, 0.003326416, 0.003387451, 0.003433228,
- 0.003463745, 0.003479004, 0.003479004, 0.003463745,
- 0.003417969, 0.003372192, 0.003280640, 0.003173828,
- 0.003051758, 0.002883911, 0.002700806, 0.002487183,
- 0.002227783, 0.001937866, 0.001617432, 0.001266479,
- 0.000869751, 0.000442505, -0.000030518, -0.000549316,
- -0.001098633, -0.001693726, -0.002334595, -0.003005981,
- -0.003723145, -0.004486084, -0.005294800, -0.006118774,
- -0.007003784, -0.007919312, -0.008865356, -0.009841919,
- -0.010848999, -0.011886597, -0.012939453, -0.014022827,
- -0.015121460, -0.016235352, -0.017349243, -0.018463135,
- -0.019577026, -0.020690918, -0.021789551, -0.022857666,
- -0.023910522, -0.024932861, -0.025909424, -0.026840210,
- -0.027725220, -0.028533936, -0.029281616, -0.029937744,
- -0.030532837, -0.031005859, -0.031387329, -0.031661987,
- -0.031814575, -0.031845093, -0.031738281, -0.031478882,
- 0.031082153, 0.030517578, 0.029785156, 0.028884888,
- 0.027801514, 0.026535034, 0.025085449, 0.023422241,
- 0.021575928, 0.019531250, 0.017257690, 0.014801025,
- 0.012115479, 0.009231567, 0.006134033, 0.002822876,
- -0.000686646, -0.004394531, -0.008316040, -0.012420654,
- -0.016708374, -0.021179199, -0.025817871, -0.030609131,
- -0.035552979, -0.040634155, -0.045837402, -0.051132202,
- -0.056533813, -0.061996460, -0.067520142, -0.073059082,
- -0.078628540, -0.084182739, -0.089706421, -0.095169067,
- -0.100540161, -0.105819702, -0.110946655, -0.115921021,
- -0.120697021, -0.125259399, -0.129562378, -0.133590698,
- -0.137298584, -0.140670776, -0.143676758, -0.146255493,
- -0.148422241, -0.150115967, -0.151306152, -0.151962280,
- -0.152069092, -0.151596069, -0.150497437, -0.148773193,
- -0.146362305, -0.143264771, -0.139450073, -0.134887695,
- -0.129577637, -0.123474121, -0.116577148, -0.108856201,
- 0.100311279, 0.090927124, 0.080688477, 0.069595337,
- 0.057617187, 0.044784546, 0.031082153, 0.016510010,
- 0.001068115, -0.015228271, -0.032379150, -0.050354004,
- -0.069168091, -0.088775635, -0.109161377, -0.130310059,
- -0.152206421, -0.174789429, -0.198059082, -0.221984863,
- -0.246505737, -0.271591187, -0.297210693, -0.323318481,
- -0.349868774, -0.376800537, -0.404083252, -0.431655884,
- -0.459472656, -0.487472534, -0.515609741, -0.543823242,
- -0.572036743, -0.600219727, -0.628295898, -0.656219482,
- -0.683914185, -0.711318970, -0.738372803, -0.765029907,
- -0.791213989, -0.816864014, -0.841949463, -0.866363525,
- -0.890090942, -0.913055420, -0.935195923, -0.956481934,
- -0.976852417, -0.996246338, -1.014617920, -1.031936646,
- -1.048156738, -1.063217163, -1.077117920, -1.089782715,
- -1.101211548, -1.111373901, -1.120223999, -1.127746582,
- -1.133926392, -1.138763428, -1.142211914, -1.144287109,
- 1.144989014, 1.144287109, 1.142211914, 1.138763428,
- 1.133926392, 1.127746582, 1.120223999, 1.111373901,
- 1.101211548, 1.089782715, 1.077117920, 1.063217163,
- 1.048156738, 1.031936646, 1.014617920, 0.996246338,
- 0.976852417, 0.956481934, 0.935195923, 0.913055420,
- 0.890090942, 0.866363525, 0.841949463, 0.816864014,
- 0.791213989, 0.765029907, 0.738372803, 0.711318970,
- 0.683914185, 0.656219482, 0.628295898, 0.600219727,
- 0.572036743, 0.543823242, 0.515609741, 0.487472534,
- 0.459472656, 0.431655884, 0.404083252, 0.376800537,
- 0.349868774, 0.323318481, 0.297210693, 0.271591187,
- 0.246505737, 0.221984863, 0.198059082, 0.174789429,
- 0.152206421, 0.130310059, 0.109161377, 0.088775635,
- 0.069168091, 0.050354004, 0.032379150, 0.015228271,
- -0.001068115, -0.016510010, -0.031082153, -0.044784546,
- -0.057617187, -0.069595337, -0.080688477, -0.090927124,
- 0.100311279, 0.108856201, 0.116577148, 0.123474121,
- 0.129577637, 0.134887695, 0.139450073, 0.143264771,
- 0.146362305, 0.148773193, 0.150497437, 0.151596069,
- 0.152069092, 0.151962280, 0.151306152, 0.150115967,
- 0.148422241, 0.146255493, 0.143676758, 0.140670776,
- 0.137298584, 0.133590698, 0.129562378, 0.125259399,
- 0.120697021, 0.115921021, 0.110946655, 0.105819702,
- 0.100540161, 0.095169067, 0.089706421, 0.084182739,
- 0.078628540, 0.073059082, 0.067520142, 0.061996460,
- 0.056533813, 0.051132202, 0.045837402, 0.040634155,
- 0.035552979, 0.030609131, 0.025817871, 0.021179199,
- 0.016708374, 0.012420654, 0.008316040, 0.004394531,
- 0.000686646, -0.002822876, -0.006134033, -0.009231567,
- -0.012115479, -0.014801025, -0.017257690, -0.019531250,
- -0.021575928, -0.023422241, -0.025085449, -0.026535034,
- -0.027801514, -0.028884888, -0.029785156, -0.030517578,
- 0.031082153, 0.031478882, 0.031738281, 0.031845093,
- 0.031814575, 0.031661987, 0.031387329, 0.031005859,
- 0.030532837, 0.029937744, 0.029281616, 0.028533936,
- 0.027725220, 0.026840210, 0.025909424, 0.024932861,
- 0.023910522, 0.022857666, 0.021789551, 0.020690918,
- 0.019577026, 0.018463135, 0.017349243, 0.016235352,
- 0.015121460, 0.014022827, 0.012939453, 0.011886597,
- 0.010848999, 0.009841919, 0.008865356, 0.007919312,
- 0.007003784, 0.006118774, 0.005294800, 0.004486084,
- 0.003723145, 0.003005981, 0.002334595, 0.001693726,
- 0.001098633, 0.000549316, 0.000030518, -0.000442505,
- -0.000869751, -0.001266479, -0.001617432, -0.001937866,
- -0.002227783, -0.002487183, -0.002700806, -0.002883911,
- -0.003051758, -0.003173828, -0.003280640, -0.003372192,
- -0.003417969, -0.003463745, -0.003479004, -0.003479004,
- -0.003463745, -0.003433228, -0.003387451, -0.003326416,
- 0.003250122, 0.003173828, 0.003082275, 0.002990723,
- 0.002899170, 0.002792358, 0.002685547, 0.002578735,
- 0.002456665, 0.002349854, 0.002243042, 0.002120972,
- 0.002014160, 0.001907349, 0.001785278, 0.001693726,
- 0.001586914, 0.001480103, 0.001388550, 0.001296997,
- 0.001205444, 0.001113892, 0.001037598, 0.000961304,
- 0.000885010, 0.000808716, 0.000747681, 0.000686646,
- 0.000625610, 0.000579834, 0.000534058, 0.000473022,
- 0.000442505, 0.000396729, 0.000366211, 0.000320435,
- 0.000289917, 0.000259399, 0.000244141, 0.000213623,
- 0.000198364, 0.000167847, 0.000152588, 0.000137329,
- 0.000122070, 0.000106812, 0.000106812, 0.000091553,
- 0.000076294, 0.000076294, 0.000061035, 0.000061035,
- 0.000045776, 0.000045776, 0.000030518, 0.000030518,
- 0.000030518, 0.000030518, 0.000015259, 0.000015259,
- 0.000015259, 0.000015259, 0.000015259, 0.000015259,
-];
projects / nihav.git / commitdiff