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-rw-r--r--deps/flac-1.3.2/src/share/replaygain_synthesis/replaygain_synthesis.c423
1 files changed, 0 insertions, 423 deletions
diff --git a/deps/flac-1.3.2/src/share/replaygain_synthesis/replaygain_synthesis.c b/deps/flac-1.3.2/src/share/replaygain_synthesis/replaygain_synthesis.c
deleted file mode 100644
index b7d227e..0000000
--- a/deps/flac-1.3.2/src/share/replaygain_synthesis/replaygain_synthesis.c
+++ /dev/null
@@ -1,423 +0,0 @@
-/* replaygain_synthesis - Routines for applying ReplayGain to a signal
- * Copyright (C) 2002-2009 Josh Coalson
- * Copyright (C) 2011-2016 Xiph.Org Foundation
- *
- * This library 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.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-/*
- * This is an aggregation of pieces of code from John Edwards' WaveGain
- * program. Mostly cosmetic changes were made; otherwise, the dithering
- * code is almost untouched and the gain processing was converted from
- * processing a whole file to processing chunks of samples.
- *
- * The original copyright notices for WaveGain's dither.c and wavegain.c
- * appear below:
- */
-/*
- * (c) 2002 John Edwards
- * mostly lifted from work by Frank Klemm
- * random functions for dithering.
- */
-/*
- * Copyright (C) 2002 John Edwards
- * Additional code by Magnus Holmgren and Gian-Carlo Pascutto
- */
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <string.h> /* for memset() */
-#include <math.h>
-#include "share/replaygain_synthesis.h"
-#include "FLAC/assert.h"
-
-#define FLAC__I64L(x) x##LL
-
-
-/*
- * the following is based on parts of dither.c
- */
-
-
-/*
- * This is a simple random number generator with good quality for audio purposes.
- * It consists of two polycounters with opposite rotation direction and different
- * periods. The periods are coprime, so the total period is the product of both.
- *
- * -------------------------------------------------------------------------------------------------
- * +-> |31:30:29:28:27:26:25:24:23:22:21:20:19:18:17:16:15:14:13:12:11:10: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0|
- * | -------------------------------------------------------------------------------------------------
- * | | | | | | |
- * | +--+--+--+-XOR-+--------+
- * | |
- * +--------------------------------------------------------------------------------------+
- *
- * -------------------------------------------------------------------------------------------------
- * |31:30:29:28:27:26:25:24:23:22:21:20:19:18:17:16:15:14:13:12:11:10: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0| <-+
- * ------------------------------------------------------------------------------------------------- |
- * | | | | |
- * +--+----XOR----+--+ |
- * | |
- * +----------------------------------------------------------------------------------------+
- *
- *
- * The first has an period of 3*5*17*257*65537, the second of 7*47*73*178481,
- * which gives a period of 18.410.713.077.675.721.215. The result is the
- * XORed values of both generators.
- */
-
-static unsigned int random_int_(void)
-{
- static const unsigned char parity_[256] = {
- 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
- 1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
- 1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
- 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
- 1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
- 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
- 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
- 1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0
- };
- static unsigned int r1_ = 1;
- static unsigned int r2_ = 1;
-
- unsigned int t1, t2, t3, t4;
-
- /* Parity calculation is done via table lookup, this is also available
- * on CPUs without parity, can be implemented in C and avoid unpredictable
- * jumps and slow rotate through the carry flag operations.
- */
- t3 = t1 = r1_; t4 = t2 = r2_;
- t1 &= 0xF5; t2 >>= 25;
- t1 = parity_[t1]; t2 &= 0x63;
- t1 <<= 31; t2 = parity_[t2];
-
- return (r1_ = (t3 >> 1) | t1 ) ^ (r2_ = (t4 + t4) | t2 );
-}
-
-/* gives a equal distributed random number */
-/* between -2^31*mult and +2^31*mult */
-static double random_equi_(double mult)
-{
- return mult * (int) random_int_();
-}
-
-/* gives a triangular distributed random number */
-/* between -2^32*mult and +2^32*mult */
-static double random_triangular_(double mult)
-{
- return mult * ( (double) (int) random_int_() + (double) (int) random_int_() );
-}
-
-
-static const float F44_0 [16 + 32] = {
- (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0,
- (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0,
-
- (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0,
- (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0,
-
- (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0,
- (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0, (float)0
-};
-
-
-static const float F44_1 [16 + 32] = { /* SNR(w) = 4.843163 dB, SNR = -3.192134 dB */
- (float) 0.85018292704024355931, (float) 0.29089597350995344721, (float)-0.05021866022121039450, (float)-0.23545456294599161833,
- (float)-0.58362726442227032096, (float)-0.67038978965193036429, (float)-0.38566861572833459221, (float)-0.15218663390367969967,
- (float)-0.02577543084864530676, (float) 0.14119295297688728127, (float) 0.22398848581628781612, (float) 0.15401727203382084116,
- (float) 0.05216161232906000929, (float)-0.00282237820999675451, (float)-0.03042794608323867363, (float)-0.03109780942998826024,
-
- (float) 0.85018292704024355931, (float) 0.29089597350995344721, (float)-0.05021866022121039450, (float)-0.23545456294599161833,
- (float)-0.58362726442227032096, (float)-0.67038978965193036429, (float)-0.38566861572833459221, (float)-0.15218663390367969967,
- (float)-0.02577543084864530676, (float) 0.14119295297688728127, (float) 0.22398848581628781612, (float) 0.15401727203382084116,
- (float) 0.05216161232906000929, (float)-0.00282237820999675451, (float)-0.03042794608323867363, (float)-0.03109780942998826024,
-
- (float) 0.85018292704024355931, (float) 0.29089597350995344721, (float)-0.05021866022121039450, (float)-0.23545456294599161833,
- (float)-0.58362726442227032096, (float)-0.67038978965193036429, (float)-0.38566861572833459221, (float)-0.15218663390367969967,
- (float)-0.02577543084864530676, (float) 0.14119295297688728127, (float) 0.22398848581628781612, (float) 0.15401727203382084116,
- (float) 0.05216161232906000929, (float)-0.00282237820999675451, (float)-0.03042794608323867363, (float)-0.03109780942998826024,
-};
-
-
-static const float F44_2 [16 + 32] = { /* SNR(w) = 10.060213 dB, SNR = -12.766730 dB */
- (float) 1.78827593892108555290, (float) 0.95508210637394326553, (float)-0.18447626783899924429, (float)-0.44198126506275016437,
- (float)-0.88404052492547413497, (float)-1.42218907262407452967, (float)-1.02037566838362314995, (float)-0.34861755756425577264,
- (float)-0.11490230170431934434, (float) 0.12498899339968611803, (float) 0.38065885268563131927, (float) 0.31883491321310506562,
- (float) 0.10486838686563442765, (float)-0.03105361685110374845, (float)-0.06450524884075370758, (float)-0.02939198261121969816,
-
- (float) 1.78827593892108555290, (float) 0.95508210637394326553, (float)-0.18447626783899924429, (float)-0.44198126506275016437,
- (float)-0.88404052492547413497, (float)-1.42218907262407452967, (float)-1.02037566838362314995, (float)-0.34861755756425577264,
- (float)-0.11490230170431934434, (float) 0.12498899339968611803, (float) 0.38065885268563131927, (float) 0.31883491321310506562,
- (float) 0.10486838686563442765, (float)-0.03105361685110374845, (float)-0.06450524884075370758, (float)-0.02939198261121969816,
-
- (float) 1.78827593892108555290, (float) 0.95508210637394326553, (float)-0.18447626783899924429, (float)-0.44198126506275016437,
- (float)-0.88404052492547413497, (float)-1.42218907262407452967, (float)-1.02037566838362314995, (float)-0.34861755756425577264,
- (float)-0.11490230170431934434, (float) 0.12498899339968611803, (float) 0.38065885268563131927, (float) 0.31883491321310506562,
- (float) 0.10486838686563442765, (float)-0.03105361685110374845, (float)-0.06450524884075370758, (float)-0.02939198261121969816,
-};
-
-
-static const float F44_3 [16 + 32] = { /* SNR(w) = 15.382598 dB, SNR = -29.402334 dB */
- (float) 2.89072132015058161445, (float) 2.68932810943698754106, (float) 0.21083359339410251227, (float)-0.98385073324997617515,
- (float)-1.11047823227097316719, (float)-2.18954076314139673147, (float)-2.36498032881953056225, (float)-0.95484132880101140785,
- (float)-0.23924057925542965158, (float)-0.13865235703915925642, (float) 0.43587843191057992846, (float) 0.65903257226026665927,
- (float) 0.24361815372443152787, (float)-0.00235974960154720097, (float) 0.01844166574603346289, (float) 0.01722945988740875099,
-
- (float) 2.89072132015058161445, (float) 2.68932810943698754106, (float) 0.21083359339410251227, (float)-0.98385073324997617515,
- (float)-1.11047823227097316719, (float)-2.18954076314139673147, (float)-2.36498032881953056225, (float)-0.95484132880101140785,
- (float)-0.23924057925542965158, (float)-0.13865235703915925642, (float) 0.43587843191057992846, (float) 0.65903257226026665927,
- (float) 0.24361815372443152787, (float)-0.00235974960154720097, (float) 0.01844166574603346289, (float) 0.01722945988740875099,
-
- (float) 2.89072132015058161445, (float) 2.68932810943698754106, (float) 0.21083359339410251227, (float)-0.98385073324997617515,
- (float)-1.11047823227097316719, (float)-2.18954076314139673147, (float)-2.36498032881953056225, (float)-0.95484132880101140785,
- (float)-0.23924057925542965158, (float)-0.13865235703915925642, (float) 0.43587843191057992846, (float) 0.65903257226026665927,
- (float) 0.24361815372443152787, (float)-0.00235974960154720097, (float) 0.01844166574603346289, (float) 0.01722945988740875099
-};
-
-
-static double scalar16_(const float* x, const float* y)
-{
- return
- x[ 0]*y[ 0] + x[ 1]*y[ 1] + x[ 2]*y[ 2] + x[ 3]*y[ 3] +
- x[ 4]*y[ 4] + x[ 5]*y[ 5] + x[ 6]*y[ 6] + x[ 7]*y[ 7] +
- x[ 8]*y[ 8] + x[ 9]*y[ 9] + x[10]*y[10] + x[11]*y[11] +
- x[12]*y[12] + x[13]*y[13] + x[14]*y[14] + x[15]*y[15];
-}
-
-
-void FLAC__replaygain_synthesis__init_dither_context(DitherContext *d, int bits, int shapingtype)
-{
- static unsigned char default_dither [] = { 92, 92, 88, 84, 81, 78, 74, 67, 0, 0 };
- static const float* F [] = { F44_0, F44_1, F44_2, F44_3 };
-
- int indx;
-
- if (shapingtype < 0) shapingtype = 0;
- if (shapingtype > 3) shapingtype = 3;
- d->ShapingType = (NoiseShaping)shapingtype;
- indx = bits - 11 - shapingtype;
- if (indx < 0) indx = 0;
- if (indx > 9) indx = 9;
-
- memset ( d->ErrorHistory , 0, sizeof (d->ErrorHistory ) );
- memset ( d->DitherHistory, 0, sizeof (d->DitherHistory) );
-
- d->FilterCoeff = F [shapingtype];
- d->Mask = ((FLAC__uint64)-1) << (32 - bits);
- d->Add = 0.5 * ((1L << (32 - bits)) - 1);
- d->Dither = 0.01f*default_dither[indx] / (((FLAC__int64)1) << bits);
- d->LastHistoryIndex = 0;
-}
-
-/*
- * the following is based on parts of wavegain.c
- */
-
-static FLAC__int64 dither_output_(DitherContext *d, FLAC__bool do_dithering, int shapingtype, int i, double Sum, int k)
-{
- union {
- double d;
- FLAC__int64 i;
- } doubletmp;
- double Sum2;
- FLAC__int64 val;
-
-#define ROUND64(x) ( doubletmp.d = (x) + d->Add + (FLAC__int64)FLAC__I64L(0x001FFFFD80000000), doubletmp.i - (FLAC__int64)FLAC__I64L(0x433FFFFD80000000) )
-
- if(do_dithering) {
- if(shapingtype == 0) {
- double tmp = random_equi_(d->Dither);
- Sum2 = tmp - d->LastRandomNumber [k];
- d->LastRandomNumber [k] = (int)tmp;
- Sum2 = Sum += Sum2;
- val = ROUND64(Sum2) & d->Mask;
- }
- else {
- Sum2 = random_triangular_(d->Dither) - scalar16_(d->DitherHistory[k], d->FilterCoeff + i);
- Sum += d->DitherHistory [k] [(-1-i)&15] = (float)Sum2;
- Sum2 = Sum + scalar16_(d->ErrorHistory [k], d->FilterCoeff + i);
- val = ROUND64(Sum2) & d->Mask;
- d->ErrorHistory [k] [(-1-i)&15] = (float)(Sum - val);
- }
- return val;
- }
- else
- return ROUND64(Sum);
-
-#undef ROUND64
-}
-
-#if 0
- float peak = 0.f,
- new_peak,
- factor_clip
- double scale,
- dB;
-
- ...
-
- peak is in the range -32768.0 .. 32767.0
-
- /* calculate factors for ReplayGain and ClippingPrevention */
- *track_gain = GetTitleGain() + settings->man_gain;
- scale = (float) pow(10., *track_gain * 0.05);
- if(settings->clip_prev) {
- factor_clip = (float) (32767./( peak + 1));
- if(scale < factor_clip)
- factor_clip = 1.f;
- else
- factor_clip /= scale;
- scale *= factor_clip;
- }
- new_peak = (float) peak * scale;
-
- dB = 20. * log10(scale);
- *track_gain = (float) dB;
-
- const double scale = pow(10., (double)gain * 0.05);
-#endif
-
-
-size_t FLAC__replaygain_synthesis__apply_gain(FLAC__byte *data_out, FLAC__bool little_endian_data_out, FLAC__bool unsigned_data_out, const FLAC__int32 * const input[], unsigned wide_samples, unsigned channels, const unsigned source_bps, const unsigned target_bps, const double scale, const FLAC__bool hard_limit, FLAC__bool do_dithering, DitherContext *dither_context)
-{
- static const FLAC__int64 hard_clip_factors_[33] = {
- 0, /* 0 bits-per-sample (not supported) */
- 0, /* 1 bits-per-sample (not supported) */
- 0, /* 2 bits-per-sample (not supported) */
- 0, /* 3 bits-per-sample (not supported) */
- -8, /* 4 bits-per-sample */
- -16, /* 5 bits-per-sample */
- -32, /* 6 bits-per-sample */
- -64, /* 7 bits-per-sample */
- -128, /* 8 bits-per-sample */
- -256, /* 9 bits-per-sample */
- -512, /* 10 bits-per-sample */
- -1024, /* 11 bits-per-sample */
- -2048, /* 12 bits-per-sample */
- -4096, /* 13 bits-per-sample */
- -8192, /* 14 bits-per-sample */
- -16384, /* 15 bits-per-sample */
- -32768, /* 16 bits-per-sample */
- -65536, /* 17 bits-per-sample */
- -131072, /* 18 bits-per-sample */
- -262144, /* 19 bits-per-sample */
- -524288, /* 20 bits-per-sample */
- -1048576, /* 21 bits-per-sample */
- -2097152, /* 22 bits-per-sample */
- -4194304, /* 23 bits-per-sample */
- -8388608, /* 24 bits-per-sample */
- -16777216, /* 25 bits-per-sample */
- -33554432, /* 26 bits-per-sample */
- -67108864, /* 27 bits-per-sample */
- -134217728, /* 28 bits-per-sample */
- -268435456, /* 29 bits-per-sample */
- -536870912, /* 30 bits-per-sample */
- -1073741824, /* 31 bits-per-sample */
- (FLAC__int64)(-1073741824) * 2 /* 32 bits-per-sample */
- };
- const FLAC__int32 conv_shift = 32 - target_bps;
- const FLAC__int64 hard_clip_factor = hard_clip_factors_[target_bps];
- /*
- * The integer input coming in has a varying range based on the
- * source_bps. We want to normalize it to [-1.0, 1.0) so instead
- * of doing two multiplies on each sample, we just multiple
- * 'scale' by 1/(2^(source_bps-1))
- */
- const double multi_scale = scale / (double)(1u << (source_bps-1));
-
- FLAC__byte * const start = data_out;
- unsigned i, channel;
- const FLAC__int32 *input_;
- double sample;
- const unsigned bytes_per_sample = target_bps / 8;
- const unsigned last_history_index = dither_context->LastHistoryIndex;
- NoiseShaping noise_shaping = dither_context->ShapingType;
- FLAC__int64 val64;
- FLAC__int32 val32;
- FLAC__int32 uval32;
- const FLAC__uint32 twiggle = 1u << (target_bps - 1);
-
- FLAC__ASSERT(channels > 0 && channels <= FLAC_SHARE__MAX_SUPPORTED_CHANNELS);
- FLAC__ASSERT(source_bps >= 4);
- FLAC__ASSERT(target_bps >= 4);
- FLAC__ASSERT(source_bps <= 32);
- FLAC__ASSERT(target_bps < 32);
- FLAC__ASSERT((target_bps & 7) == 0);
-
- for(channel = 0; channel < channels; channel++) {
- const unsigned incr = bytes_per_sample * channels;
- data_out = start + bytes_per_sample * channel;
- input_ = input[channel];
- for(i = 0; i < wide_samples; i++, data_out += incr) {
- sample = (double)input_[i] * multi_scale;
-
- if(hard_limit) {
- /* hard 6dB limiting */
- if(sample < -0.5)
- sample = tanh((sample + 0.5) / (1-0.5)) * (1-0.5) - 0.5;
- else if(sample > 0.5)
- sample = tanh((sample - 0.5) / (1-0.5)) * (1-0.5) + 0.5;
- }
- sample *= 2147483647.;
-
- val64 = dither_output_(dither_context, do_dithering, noise_shaping, (i + last_history_index) % 32, sample, channel) >> conv_shift;
-
- val32 = (FLAC__int32)val64;
- if(val64 >= -hard_clip_factor)
- val32 = (FLAC__int32)(-(hard_clip_factor+1));
- else if(val64 < hard_clip_factor)
- val32 = (FLAC__int32)hard_clip_factor;
-
- uval32 = (FLAC__uint32)val32;
- if (unsigned_data_out)
- uval32 ^= twiggle;
-
- if (little_endian_data_out) {
- switch(target_bps) {
- case 24:
- data_out[2] = (FLAC__byte)(uval32 >> 16);
- /* fall through */
- case 16:
- data_out[1] = (FLAC__byte)(uval32 >> 8);
- /* fall through */
- case 8:
- data_out[0] = (FLAC__byte)uval32;
- break;
- }
- }
- else {
- switch(target_bps) {
- case 24:
- data_out[0] = (FLAC__byte)(uval32 >> 16);
- data_out[1] = (FLAC__byte)(uval32 >> 8);
- data_out[2] = (FLAC__byte)uval32;
- break;
- case 16:
- data_out[0] = (FLAC__byte)(uval32 >> 8);
- data_out[1] = (FLAC__byte)uval32;
- break;
- case 8:
- data_out[0] = (FLAC__byte)uval32;
- break;
- }
- }
- }
- }
- dither_context->LastHistoryIndex = (last_history_index + wide_samples) % 32;
-
- return wide_samples * channels * (target_bps/8);
-}
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