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FFmpeg/libavcodec/atrac3plusdsp.c
Andreas Rheinhardt a1a8815220 libavcodec: Reduce the size of some arrays 
This commit uses smaller types for some static const arrays to reduce
their size in case the entries can be represented in the smaller type.
The biggest savings came from inv_map_table in vp9.c.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2019-06-20 14:47:46 -03:00

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/*
* ATRAC3+ compatible decoder
*
* Copyright (c) 2010-2013 Maxim Poliakovski
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* DSP functions for ATRAC3+ decoder.
*/
#include <math.h>
#include "libavutil/float_dsp.h"
#include "libavutil/libm.h"
#include "avcodec.h"
#include "sinewin.h"
#include "fft.h"
#include "atrac3plus.h"
/**
* Map quant unit number to its position in the spectrum.
* To get the number of spectral lines in each quant unit do the following:
* num_specs = qu_to_spec_pos[i+1] - qu_to_spec_pos[i]
*/
const uint16_t ff_atrac3p_qu_to_spec_pos[33] = {
0, 16, 32, 48, 64, 80, 96, 112,
128, 160, 192, 224, 256, 288, 320, 352,
384, 448, 512, 576, 640, 704, 768, 896,
1024, 1152, 1280, 1408, 1536, 1664, 1792, 1920,
2048
};
/* Scalefactors table. */
/* Approx. Equ: pow(2.0, (i - 16.0 + 0.501783948) / 3.0) */
const float ff_atrac3p_sf_tab[64] = {
0.027852058, 0.0350914, 0.044212341, 0.055704117, 0.0701828,
0.088424683, 0.11140823, 0.1403656, 0.17684937, 0.22281647, 0.2807312, 0.35369873,
0.44563293, 0.5614624, 0.70739746, 0.89126587, 1.1229248, 1.4147949, 1.7825317,
2.2458496, 2.8295898, 3.5650635, 4.4916992, 5.6591797, 7.130127, 8.9833984,
11.318359, 14.260254, 17.966797, 22.636719, 28.520508, 35.933594, 45.273438,
57.041016, 71.867188, 90.546875, 114.08203, 143.73438, 181.09375, 228.16406,
287.46875, 362.1875, 456.32812, 574.9375, 724.375, 912.65625, 1149.875,
1448.75, 1825.3125, 2299.75, 2897.5, 3650.625, 4599.5, 5795.0,
7301.25, 9199.0, 11590.0, 14602.5, 18398.0, 23180.0, 29205.0,
36796.0, 46360.0, 58410.0
};
/* Mantissa table. */
/* pow(10, x * log10(2) + 0.05) / 2 / ([1,2,3,5,7,15,31] + 0.5) */
const float ff_atrac3p_mant_tab[8] = {
0.0,
0.74801636,
0.44882202,
0.32058716,
0.20400238,
0.1496048,
0.07239151,
0.035619736
};
#define ATRAC3P_MDCT_SIZE (ATRAC3P_SUBBAND_SAMPLES * 2)
av_cold void ff_atrac3p_init_imdct(AVCodecContext *avctx, FFTContext *mdct_ctx)
{
ff_init_ff_sine_windows(7);
ff_init_ff_sine_windows(6);
/* Initialize the MDCT transform. */
ff_mdct_init(mdct_ctx, 8, 1, -1.0);
}
#define TWOPI (2 * M_PI)
#define DEQUANT_PHASE(ph) (((ph) & 0x1F) << 6)
static DECLARE_ALIGNED(32, float, sine_table)[2048]; ///< wave table
static DECLARE_ALIGNED(32, float, hann_window)[256]; ///< Hann windowing function
static float amp_sf_tab[64]; ///< scalefactors for quantized amplitudes
av_cold void ff_atrac3p_init_wave_synth(void)
{
int i;
/* generate sine wave table */
for (i = 0; i < 2048; i++)
sine_table[i] = sin(TWOPI * i / 2048);
/* generate Hann window */
for (i = 0; i < 256; i++)
hann_window[i] = (1.0f - cos(TWOPI * i / 256.0f)) * 0.5f;
/* generate amplitude scalefactors table */
for (i = 0; i < 64; i++)
amp_sf_tab[i] = exp2f((i - 3) / 4.0f);
}
/**
* Synthesize sine waves according to given parameters.
*
* @param[in] synth_param ptr to common synthesis parameters
* @param[in] waves_info parameters for each sine wave
* @param[in] envelope envelope data for all waves in a group
* @param[in] fdsp ptr to floating-point DSP context
* @param[in] invert_phase flag indicating 180° phase shift
* @param[in] reg_offset region offset for trimming envelope data
* @param[out] out receives sythesized data
*/
static void waves_synth(Atrac3pWaveSynthParams *synth_param,
Atrac3pWavesData *waves_info,
Atrac3pWaveEnvelope *envelope,
AVFloatDSPContext *fdsp,
int invert_phase, int reg_offset, float *out)
{
int i, wn, inc, pos;
double amp;
Atrac3pWaveParam *wave_param = &synth_param->waves[waves_info->start_index];
for (wn = 0; wn < waves_info->num_wavs; wn++, wave_param++) {
/* amplitude dequantization */
amp = amp_sf_tab[wave_param->amp_sf] *
(!synth_param->amplitude_mode
? (wave_param->amp_index + 1) / 15.13f
: 1.0f);
inc = wave_param->freq_index;
pos = DEQUANT_PHASE(wave_param->phase_index) - (reg_offset ^ 128) * inc & 2047;
/* waveform generation */
for (i = 0; i < 128; i++) {
out[i] += sine_table[pos] * amp;
pos = (pos + inc) & 2047;
}
}
/* invert phase if requested */
if (invert_phase)
fdsp->vector_fmul_scalar(out, out, -1.0f, 128);
/* fade in with steep Hann window if requested */
if (envelope->has_start_point) {
pos = (envelope->start_pos << 2) - reg_offset;
if (pos > 0 && pos <= 128) {
memset(out, 0, pos * sizeof(*out));
if (!envelope->has_stop_point ||
envelope->start_pos != envelope->stop_pos) {
out[pos + 0] *= hann_window[0];
out[pos + 1] *= hann_window[32];
out[pos + 2] *= hann_window[64];
out[pos + 3] *= hann_window[96];
}
}
}
/* fade out with steep Hann window if requested */
if (envelope->has_stop_point) {
pos = (envelope->stop_pos + 1 << 2) - reg_offset;
if (pos > 0 && pos <= 128) {
out[pos - 4] *= hann_window[96];
out[pos - 3] *= hann_window[64];
out[pos - 2] *= hann_window[32];
out[pos - 1] *= hann_window[0];
memset(&out[pos], 0, (128 - pos) * sizeof(out[pos]));
}
}
}
void ff_atrac3p_generate_tones(Atrac3pChanUnitCtx *ch_unit, AVFloatDSPContext *fdsp,
int ch_num, int sb, float *out)
{
DECLARE_ALIGNED(32, float, wavreg1)[128] = { 0 };
DECLARE_ALIGNED(32, float, wavreg2)[128] = { 0 };
int i, reg1_env_nonzero, reg2_env_nonzero;
Atrac3pWavesData *tones_now = &ch_unit->channels[ch_num].tones_info_prev[sb];
Atrac3pWavesData *tones_next = &ch_unit->channels[ch_num].tones_info[sb];
/* reconstruct full envelopes for both overlapping regions
* from truncated bitstream data */
if (tones_next->pend_env.has_start_point &&
tones_next->pend_env.start_pos < tones_next->pend_env.stop_pos) {
tones_next->curr_env.has_start_point = 1;
tones_next->curr_env.start_pos = tones_next->pend_env.start_pos + 32;
} else if (tones_now->pend_env.has_start_point) {
tones_next->curr_env.has_start_point = 1;
tones_next->curr_env.start_pos = tones_now->pend_env.start_pos;
} else {
tones_next->curr_env.has_start_point = 0;
tones_next->curr_env.start_pos = 0;
}
if (tones_now->pend_env.has_stop_point &&
tones_now->pend_env.stop_pos >= tones_next->curr_env.start_pos) {
tones_next->curr_env.has_stop_point = 1;
tones_next->curr_env.stop_pos = tones_now->pend_env.stop_pos;
} else if (tones_next->pend_env.has_stop_point) {
tones_next->curr_env.has_stop_point = 1;
tones_next->curr_env.stop_pos = tones_next->pend_env.stop_pos + 32;
} else {
tones_next->curr_env.has_stop_point = 0;
tones_next->curr_env.stop_pos = 64;
}
/* is the visible part of the envelope non-zero? */
reg1_env_nonzero = (tones_now->curr_env.stop_pos < 32) ? 0 : 1;
reg2_env_nonzero = (tones_next->curr_env.start_pos >= 32) ? 0 : 1;
/* synthesize waves for both overlapping regions */
if (tones_now->num_wavs && reg1_env_nonzero)
waves_synth(ch_unit->waves_info_prev, tones_now, &tones_now->curr_env,
fdsp, ch_unit->waves_info_prev->invert_phase[sb] & ch_num,
128, wavreg1);
if (tones_next->num_wavs && reg2_env_nonzero)
waves_synth(ch_unit->waves_info, tones_next, &tones_next->curr_env, fdsp,
ch_unit->waves_info->invert_phase[sb] & ch_num, 0, wavreg2);
/* Hann windowing for non-faded wave signals */
if (tones_now->num_wavs && tones_next->num_wavs &&
reg1_env_nonzero && reg2_env_nonzero) {
fdsp->vector_fmul(wavreg1, wavreg1, &hann_window[128], 128);
fdsp->vector_fmul(wavreg2, wavreg2, hann_window, 128);
} else {
if (tones_now->num_wavs && !tones_now->curr_env.has_stop_point)
fdsp->vector_fmul(wavreg1, wavreg1, &hann_window[128], 128);
if (tones_next->num_wavs && !tones_next->curr_env.has_start_point)
fdsp->vector_fmul(wavreg2, wavreg2, hann_window, 128);
}
/* Overlap and add to residual */
for (i = 0; i < 128; i++)
out[i] += wavreg1[i] + wavreg2[i];
}
static const uint8_t subband_to_powgrp[ATRAC3P_SUBBANDS] = {
0, 1, 1, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4
};
/* noise table for power compensation */
static const float noise_tab[1024] = {
-0.01358032, -0.05593872, 0.01696777, -0.14871216, -0.26412964, -0.09893799, 0.25723267,
0.02008057, -0.72235107, -0.44351196, -0.22985840, 0.16833496, 0.46902466, 0.05917358,
-0.15179443, 0.41299438, -0.01287842, 0.13360596, 0.43557739, -0.09530640, -0.58422852,
0.39266968, -0.08343506, -0.25604248, 0.22848511, 0.26013184, -0.65588379, 0.17288208,
-0.08673096, -0.05203247, 0.07299805, -0.28665161, -0.35806274, 0.06552124, -0.09387207,
0.21099854, -0.28347778, -0.72402954, 0.05050659, -0.10635376, -0.18853760, 0.29724121,
0.20703125, -0.29791260, -0.37634277, 0.47970581, -0.09976196, 0.32641602, -0.29248047,
-0.28237915, 0.26028442, -0.36157227, 0.22042847, -0.03222656, -0.37268066, -0.03759766,
0.09909058, 0.23284912, 0.19320679, 0.14453125, -0.02139282, -0.19702148, 0.31533813,
-0.16741943, 0.35031128, -0.35656738, -0.66128540, -0.00701904, 0.20898438, 0.26837158,
-0.33706665, -0.04568481, 0.12600708, 0.10284424, 0.07321167, -0.18280029, 0.38101196,
0.21301270, 0.04541016, 0.01156616, -0.26391602, -0.02346802, -0.22125244, 0.29760742,
-0.36233521, -0.31314087, -0.13967896, -0.11276245, -0.19433594, 0.34490967, 0.02343750,
0.21963501, -0.02777100, -0.67678833, -0.08999634, 0.14233398, -0.27697754, 0.51422119,
-0.05047607, 0.48327637, 0.37167358, -0.60806274, 0.18728638, -0.15191650, 0.00637817,
0.02832031, -0.15618896, 0.60644531, 0.21826172, 0.06384277, -0.31863403, 0.08816528,
0.15447998, -0.07015991, -0.08154297, -0.40966797, -0.39785767, -0.11709595, 0.22052002,
0.18466187, -0.17257690, 0.03759766, -0.06195068, 0.00433350, 0.12176514, 0.34011841,
0.25610352, -0.05294800, 0.41033936, 0.16854858, -0.76187134, 0.13845825, -0.19418335,
-0.21524048, -0.44412231, -0.08160400, -0.28195190, -0.01873779, 0.15524292, -0.37438965,
-0.44860840, 0.43096924, -0.24746704, 0.49856567, 0.14859009, 0.38159180, 0.20541382,
-0.39175415, -0.65850830, -0.43716431, 0.13037109, -0.05111694, 0.39956665, 0.21447754,
-0.04861450, 0.33654785, 0.10589600, -0.88085938, -0.30822754, 0.38577271, 0.30047607,
0.38836670, 0.09118652, -0.36477661, -0.01641846, -0.23031616, 0.26058960, 0.18859863,
-0.21868896, -0.17861938, -0.29754639, 0.09777832, 0.10806274, -0.51605225, 0.00076294,
0.13259888, 0.11090088, -0.24084473, 0.24957275, 0.01379395, -0.04141235, -0.04937744,
0.57394409, 0.27410889, 0.27587891, 0.45013428, -0.32592773, 0.11160278, -0.00970459,
0.29092407, 0.03356934, -0.70925903, 0.04882812, 0.43499756, 0.07720947, -0.27554321,
-0.01742554, -0.08413696, -0.04028320, -0.52850342, -0.07330322, 0.05181885, 0.21362305,
-0.18765259, 0.07058716, -0.03009033, 0.32662964, 0.27023315, -0.28002930, 0.17568970,
0.03338623, 0.30242920, -0.03921509, 0.32174683, -0.23733521, 0.08575439, -0.38269043,
0.09194946, -0.07238770, 0.17941284, -0.51278687, -0.25146484, 0.19790649, -0.19195557,
0.16549683, 0.42456055, 0.39129639, -0.02868652, 0.17980957, 0.24902344, -0.76583862,
-0.20959473, 0.61013794, 0.37011719, 0.36859131, -0.04486084, 0.10678101, -0.15994263,
-0.05328369, 0.28463745, -0.06420898, -0.36987305, -0.28009033, -0.11764526, 0.04312134,
-0.08038330, 0.04885864, -0.03067017, -0.00042725, 0.34289551, -0.00988770, 0.34838867,
0.32516479, -0.16271973, 0.38269043, 0.03240967, 0.12417603, -0.14331055, -0.34902954,
-0.18325806, 0.29421997, 0.44284058, 0.75170898, -0.67245483, -0.12176514, 0.27914429,
-0.29806519, 0.19863892, 0.30087280, 0.22680664, -0.36633301, -0.32534790, -0.57553101,
-0.16641235, 0.43811035, 0.08331299, 0.15942383, 0.26516724, -0.24240112, -0.11761475,
-0.16827393, -0.14260864, 0.46343994, 0.11804199, -0.55514526, -0.02520752, -0.14309692,
0.00448608, 0.02749634, -0.30545044, 0.70965576, 0.45108032, 0.66439819, -0.68255615,
-0.12496948, 0.09146118, -0.21109009, -0.23791504, 0.79943848, -0.35205078, -0.24963379,
0.18719482, -0.19079590, 0.07458496, 0.07623291, -0.28781128, -0.37121582, -0.19580078,
-0.01773071, -0.16717529, 0.13040161, 0.14672852, 0.42379761, 0.03582764, 0.11431885,
0.05145264, 0.44702148, 0.08963013, 0.01367188, -0.54519653, -0.12692261, 0.21176147,
0.04925537, 0.30670166, -0.11029053, 0.19555664, -0.27740479, 0.23043823, 0.15554810,
-0.19299316, -0.25729370, 0.17800903, -0.03579712, -0.05065918, -0.06933594, -0.09500122,
-0.07821655, 0.23889160, -0.31900024, 0.03073120, -0.00415039, 0.61315918, 0.37176514,
-0.13442993, -0.15536499, -0.19216919, -0.37899780, 0.19992065, 0.02630615, -0.12573242,
0.25927734, -0.02447510, 0.29629517, -0.40731812, -0.17333984, 0.24310303, -0.10607910,
0.14828491, 0.08792114, -0.18743896, -0.05572510, -0.04833984, 0.10473633, -0.29028320,
-0.67687988, -0.28170776, -0.41687012, 0.05413818, -0.23284912, 0.09555054, -0.08969116,
-0.15112305, 0.12738037, 0.35986328, 0.28948975, 0.30691528, 0.23956299, 0.06973267,
-0.31198120, -0.18450928, 0.22280884, -0.21600342, 0.23522949, -0.61840820, -0.13012695,
0.26412964, 0.47320557, -0.26440430, 0.38757324, 0.17352295, -0.26104736, -0.25866699,
-0.12274170, -0.29733276, 0.07687378, 0.18588257, -0.08880615, 0.31185913, 0.05313110,
-0.10885620, -0.14901733, -0.22323608, -0.08538818, 0.19812012, 0.19732666, -0.18927002,
0.29058838, 0.25555420, -0.48599243, 0.18768311, 0.01345825, 0.34887695, 0.21530151,
0.19857788, 0.18661499, -0.01394653, -0.09063721, -0.38781738, 0.27160645, -0.20379639,
-0.32119751, -0.23889160, 0.27096558, 0.24951172, 0.07922363, 0.07479858, -0.50946045,
0.10220337, 0.58364868, -0.19503784, -0.18560791, -0.01165771, 0.47195435, 0.22430420,
-0.38635254, -0.03732300, -0.09179688, 0.06991577, 0.15106201, 0.20605469, -0.05969238,
-0.41821289, 0.12231445, -0.04672241, -0.05117798, -0.11523438, -0.51849365, -0.04077148,
0.44284058, -0.64086914, 0.17019653, 0.02236938, 0.22848511, -0.23214722, -0.32354736,
-0.14068604, -0.29690552, -0.19891357, 0.02774048, -0.20965576, -0.52191162, -0.19299316,
-0.07290649, 0.49053955, -0.22302246, 0.05642700, 0.13122559, -0.20819092, -0.83590698,
-0.08181763, 0.26797485, -0.00091553, -0.09457397, 0.17089844, -0.27020264, 0.30270386,
0.05496216, 0.09564209, -0.08590698, 0.02130127, 0.35931396, 0.21728516, -0.15396118,
-0.05053711, 0.02719116, 0.16302490, 0.43212891, 0.10229492, -0.40820312, 0.21646118,
0.08435059, -0.11145020, -0.39962769, -0.05618286, -0.10223389, -0.60839844, 0.33724976,
-0.06341553, -0.47369385, -0.32852173, 0.05242920, 0.19635010, -0.19137573, -0.67901611,
0.16180420, 0.05133057, -0.22283936, 0.09646606, 0.24288940, -0.45007324, 0.08804321,
0.14053345, 0.22619629, -0.01000977, 0.36355591, -0.19863892, -0.30364990, -0.24118042,
-0.57461548, 0.26498413, 0.04345703, -0.09796143, -0.47714233, -0.23739624, 0.18737793,
0.08926392, -0.02795410, 0.00305176, -0.08700562, -0.38711548, 0.03222656, 0.10940552,
-0.41906738, -0.01620483, -0.47061157, 0.37985229, -0.21624756, 0.47976685, -0.20046997,
-0.62533569, -0.26907349, -0.02877808, 0.00671387, -0.29071045, -0.24685669, -0.15722656,
-0.26055908, 0.29968262, 0.28225708, -0.08990479, -0.16748047, -0.46759033, -0.25067139,
-0.25183105, -0.45932007, 0.05828857, 0.29006958, 0.23840332, -0.17974854, 0.26931763,
0.10696411, -0.06848145, -0.17126465, -0.10522461, -0.55386353, -0.42306519, -0.07608032,
0.24380493, 0.38586426, 0.16882324, 0.26751709, 0.17303467, 0.35809326, -0.22094727,
-0.30703735, -0.28497314, -0.04321289, 0.15219116, -0.17071533, -0.39334106, 0.03439331,
-0.10809326, -0.30590820, 0.26449585, -0.07412720, 0.13638306, -0.01062012, 0.27996826,
0.04397583, -0.05557251, -0.56933594, 0.03363037, -0.00949097, 0.52642822, -0.44329834,
0.28308105, -0.05499268, -0.23312378, -0.29870605, -0.05123901, 0.26831055, -0.35238647,
-0.30993652, 0.34646606, -0.19775391, 0.44595337, 0.13769531, 0.45358276, 0.19961548,
0.42681885, 0.15722656, 0.00128174, 0.23757935, 0.40988159, 0.25164795, -0.00732422,
-0.12405396, -0.43420410, -0.00402832, 0.34243774, 0.36264038, 0.18807983, -0.09301758,
-0.10296631, 0.05532837, -0.31652832, 0.14337158, 0.35040283, 0.32540894, 0.05728149,
-0.12030029, -0.25942993, -0.20312500, -0.16491699, -0.46051025, -0.08004761, 0.50772095,
0.16168213, 0.28439331, 0.08105469, -0.19104004, 0.38589478, -0.16400146, -0.25454712,
0.20281982, -0.20730591, -0.06311035, 0.32937622, 0.15032959, -0.05340576, 0.30487061,
-0.11648560, 0.38009644, -0.20062256, 0.43466187, 0.01150513, 0.35754395, -0.13146973,
0.67489624, 0.05212402, 0.27914429, -0.39431763, 0.75308228, -0.13366699, 0.24453735,
0.42248535, -0.65905762, -0.00546265, -0.03491211, -0.13659668, -0.08294678, -0.45666504,
0.27188110, 0.12731934, 0.61148071, 0.10449219, -0.28836060, 0.00091553, 0.24618530,
0.13119507, 0.05685425, 0.17355347, 0.42034912, 0.08514404, 0.24536133, 0.18951416,
-0.19107056, -0.15036011, 0.02334595, 0.54986572, 0.32321167, -0.16104126, -0.03054810,
0.43594360, 0.17309570, 0.61053467, 0.24731445, 0.33334351, 0.15240479, 0.15588379,
0.36425781, -0.30407715, -0.13302612, 0.00427246, 0.04171753, -0.33178711, 0.34216309,
-0.12463379, -0.02764893, 0.05905151, -0.31436157, 0.16531372, 0.34542847, -0.03292847,
0.12527466, -0.12313843, -0.13171387, 0.04757690, -0.45095825, -0.19085693, 0.35342407,
-0.23239136, -0.34387207, 0.11264038, -0.15740967, 0.05273438, 0.74942017, 0.21505737,
0.08514404, -0.42391968, -0.19531250, 0.35293579, 0.25305176, 0.15731812, -0.70324707,
-0.21591187, 0.35604858, 0.14132690, 0.11724854, 0.15853882, -0.24597168, 0.07019043,
0.02127075, 0.12658691, 0.06390381, -0.12292480, 0.15441895, -0.47640991, 0.06195068,
0.58981323, -0.15151978, -0.03604126, -0.45059204, -0.01672363, -0.46997070, 0.25750732,
0.18084717, 0.06661987, 0.13253784, 0.67828369, 0.11370850, 0.11325073, -0.04611206,
-0.07791138, -0.36544800, -0.06747437, -0.31594849, 0.16131592, 0.41983032, 0.11071777,
-0.36889648, 0.30963135, -0.37875366, 0.58508301, 0.00393677, 0.12338257, 0.03424072,
-0.21728516, -0.12838745, -0.46981812, 0.05868530, -0.25015259, 0.27407837, 0.65240479,
-0.34429932, -0.15179443, 0.14056396, 0.33505249, 0.28826904, 0.09921265, 0.34390259,
0.13656616, -0.23608398, 0.00863647, 0.02627563, -0.19119263, 0.19775391, -0.07214355,
0.07809448, 0.03454590, -0.03417969, 0.00033569, -0.23095703, 0.18673706, 0.05798340,
0.03814697, -0.04318237, 0.05487061, 0.08633423, 0.55950928, -0.06347656, 0.10333252,
0.25305176, 0.05853271, 0.12246704, -0.25543213, -0.34262085, -0.36437988, -0.21304321,
-0.05093384, 0.02777100, 0.07620239, -0.21215820, -0.09326172, 0.19021606, -0.40579224,
-0.01193237, 0.19845581, -0.35336304, -0.07397461, 0.20104980, 0.08615112, -0.44375610,
0.11419678, 0.24453735, -0.16555786, -0.05081177, -0.01406860, 0.27893066, -0.18692017,
0.07473755, 0.03451538, -0.39733887, 0.21548462, -0.22534180, -0.39651489, -0.04989624,
-0.57662964, 0.06390381, 0.62020874, -0.13470459, 0.04345703, -0.21862793, -0.02789307,
0.51696777, -0.27587891, 0.39004517, 0.09857178, -0.00738525, 0.31317139, 0.00048828,
-0.46572876, 0.29531860, -0.10009766, -0.27856445, 0.03594971, 0.25048828, -0.74584961,
-0.25350952, -0.03302002, 0.31188965, 0.01571655, 0.46710205, 0.21591187, 0.07260132,
-0.42132568, -0.53900146, -0.13674927, -0.16571045, -0.34454346, 0.12359619, -0.11184692,
0.00967407, 0.34576416, -0.05761719, 0.34848022, 0.17645264, -0.39395142, 0.10339355,
0.18215942, 0.20697021, 0.59109497, -0.11560059, -0.07385254, 0.10397339, 0.35437012,
-0.22863770, 0.01794434, 0.17559814, -0.17495728, 0.12142944, 0.10928345, -1.00000000,
-0.01379395, 0.21237183, -0.27035522, 0.27319336, -0.37066650, 0.41354370, -0.40054321,
0.00689697, 0.26321411, 0.39266968, 0.65298462, 0.41625977, -0.13909912, 0.78375244,
-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. */
static const uint8_t subband_to_qu[17] = {
0, 8, 12, 16, 18, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32
};
void ff_atrac3p_power_compensation(Atrac3pChanUnitCtx *ctx, AVFloatDSPContext *fdsp,
int ch_index, float *sp, int rng_index, int sb)
{
AtracGainInfo *g1, *g2;
LOCAL_ALIGNED_32(float, pwcsp, [ATRAC3P_SUBBAND_SAMPLES]);
float *dst, grp_lev, qu_lev;
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];
fdsp->vector_fmac_scalar(dst, pwcsp, qu_lev, nsp);
}
}
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 },
{ -0.00083093712, -0.00068422867, -0.00053928449, -0.00039945057,
-0.00026649953, -0.00014135583, -0.000025081157, 0.000084307925,
-0.00018248901, -0.00026866337, -0.00034301577, -0.00040612387,
-0.00045778, -0.00049731287, -0.00052537228, -0.00054488552 },
{ -0.00008079566, -0.000053397067, -0.00002610587, -0.0000016657353,
0.000018532943, 0.000035615325, 0.000049888811, 0.000056296329,
-0.000058270442, -0.000062285151, -0.000070208509, -0.000074850752,
-0.00007612785, -0.000073081472, -0.000068306952, -0.000064464548 },
{ -0.000048585582, -0.000046043948, -0.000045337845, -0.000041575615,
-0.000036968919, -0.000032302323, -0.00002780562, -0.000023530851,
0.0000018111954, -5.7168614e-7, -0.0000015432918, -0.0000026336629,
-0.0000041712024, -0.0000079212787, -0.000010502935, -0.0000091622824 },
{ -0.0000070302972, -0.0000063894258, -0.0000046192422, -0.0000032569742,
-0.0000023108685, -0.0000014333754, -6.005389e-7, 0.000011838618,
0.000010516783, 1.2660377e-8, 3.530856e-8, 3.226247e-8,
-4.4400572e-8, -4.2005411e-7, -8.0604229e-7, -5.8336207e-7 }
};
void ff_atrac3p_ipqf(FFTContext *dct_ctx, Atrac3pIPQFChannelCtx *hist,
const float *in, float *out)
{
int i, s, sb, t, pos_now, pos_next;
LOCAL_ALIGNED(32, float, idct_in, [ATRAC3P_SUBBANDS]);
LOCAL_ALIGNED(32, float, idct_out, [ATRAC3P_SUBBANDS]);
memset(out, 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out));
for (s = 0; s < ATRAC3P_SUBBAND_SAMPLES; s++) {
/* pick up one sample from each subband */
for (sb = 0; sb < ATRAC3P_SUBBANDS; sb++)
idct_in[sb] = in[sb * ATRAC3P_SUBBAND_SAMPLES + s];
/* Calculate the sine and cosine part of the PQF using IDCT-IV */
dct_ctx->imdct_half(dct_ctx, idct_out, idct_in);
/* append the result to the history */
for (i = 0; i < 8; i++) {
hist->buf1[hist->pos][i] = idct_out[i + 8];
hist->buf2[hist->pos][i] = idct_out[7 - i];
}
pos_now = hist->pos;
pos_next = mod23_lut[pos_now + 2]; // pos_next = (pos_now + 1) % 23;
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] +
hist->buf2[pos_next][i] * ipqf_coeffs2[t][i];
out[s * 16 + i + 8] += hist->buf1[pos_now][7 - i] * ipqf_coeffs1[t][i + 8] +
hist->buf2[pos_next][7 - i] * ipqf_coeffs2[t][i + 8];
}
pos_now = mod23_lut[pos_next + 2]; // pos_now = (pos_now + 2) % 23;
pos_next = mod23_lut[pos_now + 2]; // pos_next = (pos_next + 2) % 23;
}
hist->pos = mod23_lut[hist->pos]; // hist->pos = (hist->pos - 1) % 23;
}
}
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