2013-10-10 21:32:14 +03:00
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/*
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* ATRAC3+ compatible decoder
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*
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* Copyright (c) 2010-2013 Maxim Poliakovski
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* DSP functions for ATRAC3+ decoder.
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*/
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#include <math.h>
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#include "libavutil/float_dsp.h"
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2016-01-15 20:38:43 +02:00
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#include "libavutil/libm.h"
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2020-06-10 15:38:08 +02:00
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#include "libavutil/mem_internal.h"
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2013-10-10 21:32:14 +03:00
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#include "avcodec.h"
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#include "sinewin.h"
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#include "fft.h"
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#include "atrac3plus.h"
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/**
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* Map quant unit number to its position in the spectrum.
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* To get the number of spectral lines in each quant unit do the following:
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* num_specs = qu_to_spec_pos[i+1] - qu_to_spec_pos[i]
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*/
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const uint16_t ff_atrac3p_qu_to_spec_pos[33] = {
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0, 16, 32, 48, 64, 80, 96, 112,
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128, 160, 192, 224, 256, 288, 320, 352,
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384, 448, 512, 576, 640, 704, 768, 896,
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1024, 1152, 1280, 1408, 1536, 1664, 1792, 1920,
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2048
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};
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/* Scalefactors table. */
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/* Approx. Equ: pow(2.0, (i - 16.0 + 0.501783948) / 3.0) */
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const float ff_atrac3p_sf_tab[64] = {
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0.027852058, 0.0350914, 0.044212341, 0.055704117, 0.0701828,
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0.088424683, 0.11140823, 0.1403656, 0.17684937, 0.22281647, 0.2807312, 0.35369873,
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0.44563293, 0.5614624, 0.70739746, 0.89126587, 1.1229248, 1.4147949, 1.7825317,
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2.2458496, 2.8295898, 3.5650635, 4.4916992, 5.6591797, 7.130127, 8.9833984,
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11.318359, 14.260254, 17.966797, 22.636719, 28.520508, 35.933594, 45.273438,
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57.041016, 71.867188, 90.546875, 114.08203, 143.73438, 181.09375, 228.16406,
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287.46875, 362.1875, 456.32812, 574.9375, 724.375, 912.65625, 1149.875,
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1448.75, 1825.3125, 2299.75, 2897.5, 3650.625, 4599.5, 5795.0,
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7301.25, 9199.0, 11590.0, 14602.5, 18398.0, 23180.0, 29205.0,
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36796.0, 46360.0, 58410.0
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};
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/* Mantissa table. */
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/* pow(10, x * log10(2) + 0.05) / 2 / ([1,2,3,5,7,15,31] + 0.5) */
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const float ff_atrac3p_mant_tab[8] = {
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0.0,
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0.74801636,
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0.44882202,
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0.32058716,
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0.20400238,
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0.1496048,
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0.07239151,
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0.035619736
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};
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#define ATRAC3P_MDCT_SIZE (ATRAC3P_SUBBAND_SAMPLES * 2)
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av_cold void ff_atrac3p_init_imdct(AVCodecContext *avctx, FFTContext *mdct_ctx)
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{
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/* Initialize the MDCT transform. */
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ff_mdct_init(mdct_ctx, 8, 1, -1.0);
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}
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#define TWOPI (2 * M_PI)
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#define DEQUANT_PHASE(ph) (((ph) & 0x1F) << 6)
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static DECLARE_ALIGNED(32, float, sine_table)[2048]; ///< wave table
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static DECLARE_ALIGNED(32, float, hann_window)[256]; ///< Hann windowing function
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static float amp_sf_tab[64]; ///< scalefactors for quantized amplitudes
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2020-11-22 18:51:00 +02:00
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av_cold void ff_atrac3p_init_dsp_static(void)
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2013-10-10 21:32:14 +03:00
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{
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int i;
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/* generate sine wave table */
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for (i = 0; i < 2048; i++)
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sine_table[i] = sin(TWOPI * i / 2048);
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/* generate Hann window */
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for (i = 0; i < 256; i++)
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hann_window[i] = (1.0f - cos(TWOPI * i / 256.0f)) * 0.5f;
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/* generate amplitude scalefactors table */
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for (i = 0; i < 64; i++)
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2016-01-15 20:38:43 +02:00
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amp_sf_tab[i] = exp2f((i - 3) / 4.0f);
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2020-11-22 18:51:00 +02:00
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ff_init_ff_sine_windows(7);
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ff_init_ff_sine_windows(6);
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2013-10-10 21:32:14 +03:00
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}
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/**
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* Synthesize sine waves according to given parameters.
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*
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* @param[in] synth_param ptr to common synthesis parameters
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* @param[in] waves_info parameters for each sine wave
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* @param[in] envelope envelope data for all waves in a group
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2015-06-06 23:28:47 +02:00
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* @param[in] fdsp ptr to floating-point DSP context
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2015-06-07 12:52:06 +02:00
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* @param[in] invert_phase flag indicating 180° phase shift
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2013-10-10 21:32:14 +03:00
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* @param[in] reg_offset region offset for trimming envelope data
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* @param[out] out receives sythesized data
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*/
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static void waves_synth(Atrac3pWaveSynthParams *synth_param,
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Atrac3pWavesData *waves_info,
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Atrac3pWaveEnvelope *envelope,
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2015-06-06 23:28:47 +02:00
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AVFloatDSPContext *fdsp,
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2015-06-07 12:52:06 +02:00
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int invert_phase, int reg_offset, float *out)
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2013-10-10 21:32:14 +03:00
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{
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int i, wn, inc, pos;
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double amp;
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Atrac3pWaveParam *wave_param = &synth_param->waves[waves_info->start_index];
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for (wn = 0; wn < waves_info->num_wavs; wn++, wave_param++) {
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/* amplitude dequantization */
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amp = amp_sf_tab[wave_param->amp_sf] *
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(!synth_param->amplitude_mode
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? (wave_param->amp_index + 1) / 15.13f
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: 1.0f);
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inc = wave_param->freq_index;
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pos = DEQUANT_PHASE(wave_param->phase_index) - (reg_offset ^ 128) * inc & 2047;
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/* waveform generation */
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for (i = 0; i < 128; i++) {
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out[i] += sine_table[pos] * amp;
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pos = (pos + inc) & 2047;
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}
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}
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2015-06-07 12:52:06 +02:00
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/* invert phase if requested */
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if (invert_phase)
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2015-06-06 23:28:47 +02:00
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fdsp->vector_fmul_scalar(out, out, -1.0f, 128);
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2013-10-10 21:32:14 +03:00
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/* fade in with steep Hann window if requested */
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if (envelope->has_start_point) {
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pos = (envelope->start_pos << 2) - reg_offset;
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if (pos > 0 && pos <= 128) {
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memset(out, 0, pos * sizeof(*out));
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if (!envelope->has_stop_point ||
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envelope->start_pos != envelope->stop_pos) {
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out[pos + 0] *= hann_window[0];
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out[pos + 1] *= hann_window[32];
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out[pos + 2] *= hann_window[64];
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out[pos + 3] *= hann_window[96];
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}
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}
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}
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/* fade out with steep Hann window if requested */
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if (envelope->has_stop_point) {
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pos = (envelope->stop_pos + 1 << 2) - reg_offset;
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if (pos > 0 && pos <= 128) {
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out[pos - 4] *= hann_window[96];
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out[pos - 3] *= hann_window[64];
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out[pos - 2] *= hann_window[32];
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out[pos - 1] *= hann_window[0];
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memset(&out[pos], 0, (128 - pos) * sizeof(out[pos]));
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}
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}
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}
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void ff_atrac3p_generate_tones(Atrac3pChanUnitCtx *ch_unit, AVFloatDSPContext *fdsp,
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int ch_num, int sb, float *out)
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{
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DECLARE_ALIGNED(32, float, wavreg1)[128] = { 0 };
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DECLARE_ALIGNED(32, float, wavreg2)[128] = { 0 };
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int i, reg1_env_nonzero, reg2_env_nonzero;
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Atrac3pWavesData *tones_now = &ch_unit->channels[ch_num].tones_info_prev[sb];
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Atrac3pWavesData *tones_next = &ch_unit->channels[ch_num].tones_info[sb];
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/* reconstruct full envelopes for both overlapping regions
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* from truncated bitstream data */
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if (tones_next->pend_env.has_start_point &&
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tones_next->pend_env.start_pos < tones_next->pend_env.stop_pos) {
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tones_next->curr_env.has_start_point = 1;
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tones_next->curr_env.start_pos = tones_next->pend_env.start_pos + 32;
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} else if (tones_now->pend_env.has_start_point) {
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tones_next->curr_env.has_start_point = 1;
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tones_next->curr_env.start_pos = tones_now->pend_env.start_pos;
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} else {
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tones_next->curr_env.has_start_point = 0;
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tones_next->curr_env.start_pos = 0;
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}
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if (tones_now->pend_env.has_stop_point &&
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tones_now->pend_env.stop_pos >= tones_next->curr_env.start_pos) {
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tones_next->curr_env.has_stop_point = 1;
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tones_next->curr_env.stop_pos = tones_now->pend_env.stop_pos;
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} else if (tones_next->pend_env.has_stop_point) {
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tones_next->curr_env.has_stop_point = 1;
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tones_next->curr_env.stop_pos = tones_next->pend_env.stop_pos + 32;
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} else {
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tones_next->curr_env.has_stop_point = 0;
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tones_next->curr_env.stop_pos = 64;
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}
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/* is the visible part of the envelope non-zero? */
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reg1_env_nonzero = (tones_now->curr_env.stop_pos < 32) ? 0 : 1;
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reg2_env_nonzero = (tones_next->curr_env.start_pos >= 32) ? 0 : 1;
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/* synthesize waves for both overlapping regions */
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if (tones_now->num_wavs && reg1_env_nonzero)
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waves_synth(ch_unit->waves_info_prev, tones_now, &tones_now->curr_env,
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2015-06-07 12:52:06 +02:00
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fdsp, ch_unit->waves_info_prev->invert_phase[sb] & ch_num,
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2013-10-10 21:32:14 +03:00
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128, wavreg1);
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if (tones_next->num_wavs && reg2_env_nonzero)
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2015-06-06 23:28:47 +02:00
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waves_synth(ch_unit->waves_info, tones_next, &tones_next->curr_env, fdsp,
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2015-06-07 12:52:06 +02:00
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ch_unit->waves_info->invert_phase[sb] & ch_num, 0, wavreg2);
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2013-10-10 21:32:14 +03:00
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/* Hann windowing for non-faded wave signals */
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if (tones_now->num_wavs && tones_next->num_wavs &&
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reg1_env_nonzero && reg2_env_nonzero) {
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fdsp->vector_fmul(wavreg1, wavreg1, &hann_window[128], 128);
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fdsp->vector_fmul(wavreg2, wavreg2, hann_window, 128);
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} else {
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if (tones_now->num_wavs && !tones_now->curr_env.has_stop_point)
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fdsp->vector_fmul(wavreg1, wavreg1, &hann_window[128], 128);
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if (tones_next->num_wavs && !tones_next->curr_env.has_start_point)
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fdsp->vector_fmul(wavreg2, wavreg2, hann_window, 128);
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}
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/* Overlap and add to residual */
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for (i = 0; i < 128; i++)
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out[i] += wavreg1[i] + wavreg2[i];
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}
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2019-06-19 04:39:47 +02:00
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static const uint8_t subband_to_powgrp[ATRAC3P_SUBBANDS] = {
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2013-10-10 21:32:14 +03:00
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0, 1, 1, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4
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};
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/* noise table for power compensation */
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static const float noise_tab[1024] = {
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-0.01358032, -0.05593872, 0.01696777, -0.14871216, -0.26412964, -0.09893799, 0.25723267,
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0.02008057, -0.72235107, -0.44351196, -0.22985840, 0.16833496, 0.46902466, 0.05917358,
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-0.15179443, 0.41299438, -0.01287842, 0.13360596, 0.43557739, -0.09530640, -0.58422852,
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0.39266968, -0.08343506, -0.25604248, 0.22848511, 0.26013184, -0.65588379, 0.17288208,
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-0.08673096, -0.05203247, 0.07299805, -0.28665161, -0.35806274, 0.06552124, -0.09387207,
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|
|
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|
|
|
|
-0.30941772, 0.20169067, -0.39367676, 0.94021606, -0.24066162, 0.05557251, -0.24533081,
|
|
|
|
|
-0.05444336, -0.76754761, -0.19375610, -0.11041260, -0.17532349, 0.16006470, 0.02188110,
|
|
|
|
|
0.17465210, -0.04342651, -0.56777954, -0.40988159, 0.26687622, 0.11700439, -0.00344849,
|
|
|
|
|
-0.05395508, 0.37426758, -0.40719604, -0.15032959, -0.01660156, 0.04196167, -0.04559326,
|
|
|
|
|
-0.12969971, 0.12011719, 0.08419800, -0.11199951, 0.35174561, 0.10275269, -0.25686646,
|
|
|
|
|
0.48446655, 0.03225708, 0.28408813, -0.18701172, 0.36282349, -0.03280640, 0.32302856,
|
|
|
|
|
0.17233276, 0.48269653, 0.31112671, -0.04946899, 0.12774658, 0.52685547, 0.10211182,
|
|
|
|
|
0.05953979, 0.05999756, 0.20144653, 0.00744629, 0.27316284, 0.24377441, 0.39672852,
|
|
|
|
|
0.01702881, -0.35513306, 0.11364746, -0.13555908, 0.48880005, -0.15417480, -0.09149170,
|
|
|
|
|
-0.02615356, 0.46246338, -0.72250366, 0.22332764, 0.23849487, -0.25686646, -0.08514404,
|
|
|
|
|
-0.02062988, -0.34494019, -0.02297974, -0.80386353, -0.08074951, -0.12689209, -0.06896973,
|
|
|
|
|
0.24099731, -0.35650635, -0.09558105, 0.29254150, 0.23132324, -0.16726685, 0.00000000,
|
|
|
|
|
-0.24237061, 0.30899048, 0.29504395, -0.20898438, 0.17059326, -0.07672119, -0.14395142,
|
|
|
|
|
0.05572510, 0.20602417, -0.51550293, -0.03167725, -0.48840332, -0.20425415, 0.14144897,
|
|
|
|
|
0.07275391, -0.76669312, -0.22488403, 0.20651245, 0.03259277, 0.00085449, 0.03039551,
|
|
|
|
|
0.47555542, 0.38351440
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/** Noise level table for power compensation.
|
|
|
|
|
* Equ: pow(2.0f, (double)(6 - i) / 3.0f) where i = 0...15 */
|
|
|
|
|
static const float pwc_levs[16] = {
|
|
|
|
|
3.96875, 3.15625, 2.5, 2.0, 1.59375, 1.25, 1.0, 0.78125,
|
|
|
|
|
0.625, 0.5, 0.40625, 0.3125, 0.25, 0.1875, 0.15625, 0.0
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/** Map subband number to quant unit number. */
|
2019-06-19 04:39:47 +02:00
|
|
|
static const uint8_t subband_to_qu[17] = {
|
2013-10-10 21:32:14 +03:00
|
|
|
0, 8, 12, 16, 18, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32
|
|
|
|
|
};
|
|
|
|
|
|
2017-07-20 20:37:36 +02:00
|
|
|
void ff_atrac3p_power_compensation(Atrac3pChanUnitCtx *ctx, AVFloatDSPContext *fdsp,
|
|
|
|
|
int ch_index, float *sp, int rng_index, int sb)
|
2013-10-10 21:32:14 +03:00
|
|
|
{
|
|
|
|
|
AtracGainInfo *g1, *g2;
|
2017-07-20 20:37:36 +02:00
|
|
|
LOCAL_ALIGNED_32(float, pwcsp, [ATRAC3P_SUBBAND_SAMPLES]);
|
|
|
|
|
float *dst, grp_lev, qu_lev;
|
2013-10-10 21:32:14 +03:00
|
|
|
int i, gain_lev, gcv = 0, qu, nsp;
|
|
|
|
|
int swap_ch = (ctx->unit_type == CH_UNIT_STEREO && ctx->swap_channels[sb]) ? 1 : 0;
|
|
|
|
|
|
|
|
|
|
if (ctx->channels[ch_index ^ swap_ch].power_levs[subband_to_powgrp[sb]] == ATRAC3P_POWER_COMP_OFF)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* generate initial noise spectrum */
|
|
|
|
|
for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++, rng_index++)
|
|
|
|
|
pwcsp[i] = noise_tab[rng_index & 0x3FF];
|
|
|
|
|
|
|
|
|
|
/* check gain control information */
|
|
|
|
|
g1 = &ctx->channels[ch_index ^ swap_ch].gain_data[sb];
|
|
|
|
|
g2 = &ctx->channels[ch_index ^ swap_ch].gain_data_prev[sb];
|
|
|
|
|
|
|
|
|
|
gain_lev = (g1->num_points > 0) ? (6 - g1->lev_code[0]) : 0;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < g2->num_points; i++)
|
|
|
|
|
gcv = FFMAX(gcv, gain_lev - (g2->lev_code[i] - 6));
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < g1->num_points; i++)
|
|
|
|
|
gcv = FFMAX(gcv, 6 - g1->lev_code[i]);
|
|
|
|
|
|
|
|
|
|
grp_lev = pwc_levs[ctx->channels[ch_index ^ swap_ch].power_levs[subband_to_powgrp[sb]]] / (1 << gcv);
|
|
|
|
|
|
|
|
|
|
/* skip the lowest two quant units (frequencies 0...351 Hz) for subband 0 */
|
|
|
|
|
for (qu = subband_to_qu[sb] + (!sb ? 2 : 0); qu < subband_to_qu[sb + 1]; qu++) {
|
|
|
|
|
if (ctx->channels[ch_index].qu_wordlen[qu] <= 0)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
qu_lev = ff_atrac3p_sf_tab[ctx->channels[ch_index].qu_sf_idx[qu]] *
|
|
|
|
|
ff_atrac3p_mant_tab[ctx->channels[ch_index].qu_wordlen[qu]] /
|
|
|
|
|
(1 << ctx->channels[ch_index].qu_wordlen[qu]) * grp_lev;
|
|
|
|
|
|
|
|
|
|
dst = &sp[ff_atrac3p_qu_to_spec_pos[qu]];
|
|
|
|
|
nsp = ff_atrac3p_qu_to_spec_pos[qu + 1] - ff_atrac3p_qu_to_spec_pos[qu];
|
|
|
|
|
|
2017-07-20 20:37:36 +02:00
|
|
|
fdsp->vector_fmac_scalar(dst, pwcsp, qu_lev, nsp);
|
2013-10-10 21:32:14 +03:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void ff_atrac3p_imdct(AVFloatDSPContext *fdsp, FFTContext *mdct_ctx, float *pIn,
|
|
|
|
|
float *pOut, int wind_id, int sb)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
if (sb & 1)
|
|
|
|
|
for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES / 2; i++)
|
|
|
|
|
FFSWAP(float, pIn[i], pIn[ATRAC3P_SUBBAND_SAMPLES - 1 - i]);
|
|
|
|
|
|
|
|
|
|
mdct_ctx->imdct_calc(mdct_ctx, pOut, pIn);
|
|
|
|
|
|
|
|
|
|
/* Perform windowing on the output.
|
|
|
|
|
* ATRAC3+ uses two different MDCT windows:
|
|
|
|
|
* - The first one is just the plain sine window of size 256
|
|
|
|
|
* - The 2nd one is the plain sine window of size 128
|
|
|
|
|
* wrapped into zero (at the start) and one (at the end) regions.
|
|
|
|
|
* Both regions are 32 samples long. */
|
|
|
|
|
if (wind_id & 2) { /* 1st half: steep window */
|
|
|
|
|
memset(pOut, 0, sizeof(float) * 32);
|
|
|
|
|
fdsp->vector_fmul(&pOut[32], &pOut[32], ff_sine_64, 64);
|
|
|
|
|
} else /* 1st half: simple sine window */
|
|
|
|
|
fdsp->vector_fmul(pOut, pOut, ff_sine_128, ATRAC3P_MDCT_SIZE / 2);
|
|
|
|
|
|
|
|
|
|
if (wind_id & 1) { /* 2nd half: steep window */
|
|
|
|
|
fdsp->vector_fmul_reverse(&pOut[160], &pOut[160], ff_sine_64, 64);
|
|
|
|
|
memset(&pOut[224], 0, sizeof(float) * 32);
|
|
|
|
|
} else /* 2nd half: simple sine window */
|
|
|
|
|
fdsp->vector_fmul_reverse(&pOut[128], &pOut[128], ff_sine_128,
|
|
|
|
|
ATRAC3P_MDCT_SIZE / 2);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* lookup table for fast modulo 23 op required for cyclic buffers of the IPQF */
|
|
|
|
|
static const int mod23_lut[26] = {
|
|
|
|
|
23, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
|
|
|
12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 0
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* First half of the 384-tap IPQF filtering coefficients. */
|
|
|
|
|
static const float ipqf_coeffs1[ATRAC3P_PQF_FIR_LEN][16] = {
|
|
|
|
|
{ -5.8336207e-7, -8.0604229e-7, -4.2005411e-7, -4.4400572e-8,
|
|
|
|
|
3.226247e-8, 3.530856e-8, 1.2660377e-8, 0.000010516783,
|
|
|
|
|
-0.000011838618, 6.005389e-7, 0.0000014333754, 0.0000023108685,
|
|
|
|
|
0.0000032569742, 0.0000046192422, 0.0000063894258, 0.0000070302972 },
|
|
|
|
|
{ -0.0000091622824, -0.000010502935, -0.0000079212787, -0.0000041712024,
|
|
|
|
|
-0.0000026336629, -0.0000015432918, -5.7168614e-7, 0.0000018111954,
|
|
|
|
|
0.000023530851, 0.00002780562, 0.000032302323, 0.000036968919,
|
|
|
|
|
0.000041575615, 0.000045337845, 0.000046043948, 0.000048585582 },
|
|
|
|
|
{ -0.000064464548, -0.000068306952, -0.000073081472, -0.00007612785,
|
|
|
|
|
-0.000074850752, -0.000070208509, -0.000062285151, -0.000058270442,
|
|
|
|
|
-0.000056296329, -0.000049888811, -0.000035615325, -0.000018532943,
|
|
|
|
|
0.0000016657353, 0.00002610587, 0.000053397067, 0.00008079566 },
|
|
|
|
|
{ -0.00054488552, -0.00052537228, -0.00049731287, -0.00045778,
|
|
|
|
|
-0.00040612387, -0.00034301577, -0.00026866337, -0.00018248901,
|
|
|
|
|
-0.000084307925, 0.000025081157, 0.00014135583, 0.00026649953,
|
|
|
|
|
0.00039945057, 0.00053928449, 0.00068422867, 0.00083093712 },
|
|
|
|
|
{ -0.0014771431, -0.001283227, -0.0010566821, -0.00079780724,
|
|
|
|
|
-0.00050782406, -0.00018855913, 0.00015771533, 0.00052769453,
|
|
|
|
|
0.00091862219, 0.001326357, 0.0017469483, 0.0021754825,
|
|
|
|
|
0.0026067684, 0.0030352892, 0.0034549395, 0.0038591374 },
|
|
|
|
|
{ -0.0022995141, -0.001443546, -0.00049266568, 0.00055068987,
|
|
|
|
|
0.001682895, 0.0028992873, 0.0041943151, 0.0055614738,
|
|
|
|
|
0.0069935122, 0.0084823566, 0.010018963, 0.011593862,
|
|
|
|
|
0.013196872, 0.014817309, 0.016444042, 0.018065533 },
|
|
|
|
|
{ -0.034426283, -0.034281436, -0.033992987, -0.033563249,
|
|
|
|
|
-0.032995768, -0.032295227, -0.031467363, -0.030518902,
|
|
|
|
|
-0.02945766, -0.028291954, -0.027031265, -0.025685543,
|
|
|
|
|
-0.024265358, -0.022781773, -0.021246184, -0.019670162 },
|
|
|
|
|
{ -0.0030586775, -0.0037203205, -0.0042847847, -0.0047529764,
|
|
|
|
|
-0.0051268316, -0.0054091476, -0.0056034233, -0.005714261,
|
|
|
|
|
-0.0057445862, -0.0057025906, -0.0055920109, -0.0054194843,
|
|
|
|
|
-0.0051914565, -0.0049146507, -0.0045959447, -0.0042418269 },
|
|
|
|
|
{ -0.0016376863, -0.0017651899, -0.0018608454, -0.0019252141,
|
|
|
|
|
-0.0019593791, -0.0019653172, -0.0019450618, -0.0018990048,
|
|
|
|
|
-0.00183808, -0.0017501717, -0.0016481078, -0.0015320742,
|
|
|
|
|
-0.0014046903, -0.0012685474, -0.001125814, -0.00097943726 },
|
|
|
|
|
{ -0.00055432378, -0.00055472925, -0.00054783461, -0.00053276919,
|
|
|
|
|
-0.00051135791, -0.00048466062, -0.00045358928, -0.00042499689,
|
|
|
|
|
-0.00036942671, -0.0003392619, -0.00030001783, -0.00025986304,
|
|
|
|
|
-0.0002197204, -0.00018116167, -0.00014691355, -0.00011279432 },
|
|
|
|
|
{ -0.000064147389, -0.00006174868, -0.000054267788, -0.000047133824,
|
|
|
|
|
-0.000042927582, -0.000039477309, -0.000036340745, -0.000029687517,
|
|
|
|
|
-0.000049787737, -0.000041577889, -0.000033864744, -0.000026534748,
|
|
|
|
|
-0.000019841305, -0.000014789486, -0.000013131184, -0.0000099198869 },
|
|
|
|
|
{ -0.0000062990207, -0.0000072701259, -0.000011984052, -0.000017348082,
|
|
|
|
|
-0.000019907106, -0.000021348773, -0.000021961965, -0.000012203576,
|
|
|
|
|
-0.000010840992, 4.6299544e-7, 5.2588763e-7, 2.7792686e-7,
|
|
|
|
|
-2.3649704e-7, -0.0000010897784, -9.171448e-7, -5.22682e-7 }
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Second half of the 384-tap IPQF filtering coefficients. */
|
|
|
|
|
static const float ipqf_coeffs2[ATRAC3P_PQF_FIR_LEN][16] = {
|
|
|
|
|
{ 5.22682e-7, 9.171448e-7, 0.0000010897784, 2.3649704e-7,
|
|
|
|
|
-2.7792686e-7, -5.2588763e-7, -4.6299544e-7, 0.000010840992,
|
|
|
|
|
-0.000012203576, -0.000021961965, -0.000021348773, -0.000019907106,
|
|
|
|
|
-0.000017348082, -0.000011984052, -0.0000072701259, -0.0000062990207 },
|
|
|
|
|
{ 0.0000099198869, 0.000013131184, 0.000014789486, 0.000019841305,
|
|
|
|
|
0.000026534748, 0.000033864744, 0.000041577889, 0.000049787737,
|
|
|
|
|
-0.000029687517, -0.000036340745, -0.000039477309, -0.000042927582,
|
|
|
|
|
-0.000047133824, -0.000054267788, -0.00006174868, -0.000064147389 },
|
|
|
|
|
{ 0.00011279432, 0.00014691355, 0.00018116167, 0.0002197204,
|
|
|
|
|
0.00025986304, 0.00030001783, 0.0003392619, 0.00036942671,
|
|
|
|
|
-0.00042499689, -0.00045358928, -0.00048466062, -0.00051135791,
|
|
|
|
|
-0.00053276919, -0.00054783461, -0.00055472925, -0.00055432378 },
|
|
|
|
|
{ 0.00097943726, 0.001125814, 0.0012685474, 0.0014046903,
|
|
|
|
|
0.0015320742, 0.0016481078, 0.0017501717, 0.00183808,
|
|
|
|
|
-0.0018990048, -0.0019450618, -0.0019653172, -0.0019593791,
|
|
|
|
|
-0.0019252141, -0.0018608454, -0.0017651899, -0.0016376863 },
|
|
|
|
|
{ 0.0042418269, 0.0045959447, 0.0049146507, 0.0051914565,
|
|
|
|
|
0.0054194843, 0.0055920109, 0.0057025906, 0.0057445862,
|
|
|
|
|
-0.005714261, -0.0056034233, -0.0054091476, -0.0051268316,
|
|
|
|
|
-0.0047529764, -0.0042847847, -0.0037203205, -0.0030586775 },
|
|
|
|
|
{ 0.019670162, 0.021246184, 0.022781773, 0.024265358,
|
|
|
|
|
0.025685543, 0.027031265, 0.028291954, 0.02945766,
|
|
|
|
|
-0.030518902, -0.031467363, -0.032295227, -0.032995768,
|
|
|
|
|
-0.033563249, -0.033992987, -0.034281436, -0.034426283 },
|
|
|
|
|
{ -0.018065533, -0.016444042, -0.014817309, -0.013196872,
|
|
|
|
|
-0.011593862, -0.010018963, -0.0084823566, -0.0069935122,
|
|
|
|
|
0.0055614738, 0.0041943151, 0.0028992873, 0.001682895,
|
|
|
|
|
0.00055068987, -0.00049266568, -0.001443546, -0.0022995141 },
|
|
|
|
|
{ -0.0038591374, -0.0034549395, -0.0030352892, -0.0026067684,
|
|
|
|
|
-0.0021754825, -0.0017469483, -0.001326357, -0.00091862219,
|
|
|
|
|
0.00052769453, 0.00015771533, -0.00018855913, -0.00050782406,
|
|
|
|
|
-0.00079780724, -0.0010566821, -0.001283227, -0.0014771431 },
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|
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{ -0.00083093712, -0.00068422867, -0.00053928449, -0.00039945057,
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|
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-0.00026649953, -0.00014135583, -0.000025081157, 0.000084307925,
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|
|
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|
-0.00018248901, -0.00026866337, -0.00034301577, -0.00040612387,
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|
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-0.00045778, -0.00049731287, -0.00052537228, -0.00054488552 },
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|
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{ -0.00008079566, -0.000053397067, -0.00002610587, -0.0000016657353,
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0.000018532943, 0.000035615325, 0.000049888811, 0.000056296329,
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|
|
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-0.000058270442, -0.000062285151, -0.000070208509, -0.000074850752,
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|
|
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|
-0.00007612785, -0.000073081472, -0.000068306952, -0.000064464548 },
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|
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{ -0.000048585582, -0.000046043948, -0.000045337845, -0.000041575615,
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|
|
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|
-0.000036968919, -0.000032302323, -0.00002780562, -0.000023530851,
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|
|
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|
0.0000018111954, -5.7168614e-7, -0.0000015432918, -0.0000026336629,
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|
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|
-0.0000041712024, -0.0000079212787, -0.000010502935, -0.0000091622824 },
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|
{ -0.0000070302972, -0.0000063894258, -0.0000046192422, -0.0000032569742,
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-0.0000023108685, -0.0000014333754, -6.005389e-7, 0.000011838618,
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|
0.000010516783, 1.2660377e-8, 3.530856e-8, 3.226247e-8,
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|
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|
-4.4400572e-8, -4.2005411e-7, -8.0604229e-7, -5.8336207e-7 }
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|
};
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void ff_atrac3p_ipqf(FFTContext *dct_ctx, Atrac3pIPQFChannelCtx *hist,
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const float *in, float *out)
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{
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int i, s, sb, t, pos_now, pos_next;
|
2015-04-17 11:58:41 +02:00
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LOCAL_ALIGNED(32, float, idct_in, [ATRAC3P_SUBBANDS]);
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LOCAL_ALIGNED(32, float, idct_out, [ATRAC3P_SUBBANDS]);
|
2013-10-10 21:32:14 +03:00
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memset(out, 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out));
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for (s = 0; s < ATRAC3P_SUBBAND_SAMPLES; s++) {
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/* pick up one sample from each subband */
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|
|
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for (sb = 0; sb < ATRAC3P_SUBBANDS; sb++)
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idct_in[sb] = in[sb * ATRAC3P_SUBBAND_SAMPLES + s];
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|
/* Calculate the sine and cosine part of the PQF using IDCT-IV */
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|
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dct_ctx->imdct_half(dct_ctx, idct_out, idct_in);
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/* append the result to the history */
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|
|
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for (i = 0; i < 8; i++) {
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hist->buf1[hist->pos][i] = idct_out[i + 8];
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|
hist->buf2[hist->pos][i] = idct_out[7 - i];
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}
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pos_now = hist->pos;
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|
pos_next = mod23_lut[pos_now + 2]; // pos_next = (pos_now + 1) % 23;
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|
for (t = 0; t < ATRAC3P_PQF_FIR_LEN; t++) {
|
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
|
|
|
out[s * 16 + i + 0] += hist->buf1[pos_now][i] * ipqf_coeffs1[t][i] +
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|
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|
|
hist->buf2[pos_next][i] * ipqf_coeffs2[t][i];
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|
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|
|
out[s * 16 + i + 8] += hist->buf1[pos_now][7 - i] * ipqf_coeffs1[t][i + 8] +
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|
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|
|
hist->buf2[pos_next][7 - i] * ipqf_coeffs2[t][i + 8];
|
|
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|
}
|
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|
|
pos_now = mod23_lut[pos_next + 2]; // pos_now = (pos_now + 2) % 23;
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|
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|
pos_next = mod23_lut[pos_now + 2]; // pos_next = (pos_next + 2) % 23;
|
|
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|
|
}
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|
hist->pos = mod23_lut[hist->pos]; // hist->pos = (hist->pos - 1) % 23;
|
|
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|
}
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}
|
