Adding upstream version 1.4.3+ds.upstream/1.4.3+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 431 insertions, 0 deletions

diff --git a/src/share/replaygain_synthesis/CMakeLists.txt b/src/share/replaygain_synthesis/CMakeLists.txt
new file mode 100644
index 0000000..0736f4f
--- /dev/null
+++ b/src/share/replaygain_synthesis/CMakeLists.txt
@@ -0,0 +1,2 @@
+add_library(replaygain_synthesis STATIC
+    replaygain_synthesis.c)
diff --git a/src/share/replaygain_synthesis/replaygain_synthesis.c b/src/share/replaygain_synthesis/replaygain_synthesis.c
new file mode 100644
index 0000000..8d4fda6
--- /dev/null
+++ b/src/share/replaygain_synthesis/replaygain_synthesis.c
@@ -0,0 +1,429 @@
+/* replaygain_synthesis - Routines for applying ReplayGain to a signal
+ * Copyright (C) 2002-2009  Josh Coalson
+ * Copyright (C) 2011-2023  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/compat.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 uint32_t random_int_(void)
+{
+	static const uint8_t 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 uint32_t r1_ = 1;
+	static uint32_t r2_ = 1;
+
+	uint32_t 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 uint8_t 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;
+}
+
+static inline int64_t
+ROUND64 (DitherContext *d, double x)
+{
+	union {
+		double d;
+		int64_t i;
+	} doubletmp;
+
+    doubletmp.d = x + d->Add + (int64_t)FLAC__I64L(0x001FFFFD80000000);
+
+    return doubletmp.i - (int64_t)FLAC__I64L(0x433FFFFD80000000);
+}
+
+/*
+ * the following is based on parts of wavegain.c
+ */
+
+static int64_t dither_output_(DitherContext *d, FLAC__bool do_dithering, int shapingtype, int i, double Sum, int k)
+{
+	double Sum2;
+	int64_t val;
+
+	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(d, 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(d, Sum2) & d->Mask;
+			d->ErrorHistory [k] [(-1-i)&15] = (float)(Sum - val);
+		}
+		return val;
+	}
+
+	return ROUND64(d, Sum);
+}
+
+#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 uint32_t_data_out, const FLAC__int32 * const input[], uint32_t wide_samples, uint32_t channels, const uint32_t source_bps, const uint32_t 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;
+	uint32_t i, channel;
+	const FLAC__int32 *input_;
+	double sample;
+	const uint32_t bytes_per_sample = target_bps / 8;
+	const uint32_t 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 uint32_t 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 (uint32_t_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);
+}