Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 204 insertions, 0 deletions

diff --git a/sound/isa/gus/gus_volume.c b/sound/isa/gus/gus_volume.c
new file mode 100644
index 000000000..ed72196a3
--- /dev/null
+++ b/sound/isa/gus/gus_volume.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#include <linux/time.h>
+#include <linux/export.h>
+#include <sound/core.h>
+#include <sound/gus.h>
+#define __GUS_TABLES_ALLOC__
+#include "gus_tables.h"
+
+EXPORT_SYMBOL(snd_gf1_atten_table); /* for snd-gus-synth module */
+
+unsigned short snd_gf1_lvol_to_gvol_raw(unsigned int vol)
+{
+	unsigned short e, m, tmp;
+
+	if (vol > 65535)
+		vol = 65535;
+	tmp = vol;
+	e = 7;
+	if (tmp < 128) {
+		while (e > 0 && tmp < (1 << e))
+			e--;
+	} else {
+		while (tmp > 255) {
+			tmp >>= 1;
+			e++;
+		}
+	}
+	m = vol - (1 << e);
+	if (m > 0) {
+		if (e > 8)
+			m >>= e - 8;
+		else if (e < 8)
+			m <<= 8 - e;
+		m &= 255;
+	}
+	return (e << 8) | m;
+}
+
+#if 0
+
+unsigned int snd_gf1_gvol_to_lvol_raw(unsigned short gf1_vol)
+{
+	unsigned int rvol;
+	unsigned short e, m;
+
+	if (!gf1_vol)
+		return 0;
+	e = gf1_vol >> 8;
+	m = (unsigned char) gf1_vol;
+	rvol = 1 << e;
+	if (e > 8)
+		return rvol | (m << (e - 8));
+	return rvol | (m >> (8 - e));
+}
+
+unsigned int snd_gf1_calc_ramp_rate(struct snd_gus_card * gus,
+				    unsigned short start,
+				    unsigned short end,
+				    unsigned int us)
+{
+	static const unsigned char vol_rates[19] =
+	{
+		23, 24, 26, 28, 29, 31, 32, 34,
+		36, 37, 39, 40, 42, 44, 45, 47,
+		49, 50, 52
+	};
+	unsigned short range, increment, value, i;
+
+	start >>= 4;
+	end >>= 4;
+	if (start < end)
+		us /= end - start;
+	else
+		us /= start - end;
+	range = 4;
+	value = gus->gf1.enh_mode ?
+	    vol_rates[0] :
+	    vol_rates[gus->gf1.active_voices - 14];
+	for (i = 0; i < 3; i++) {
+		if (us < value) {
+			range = i;
+			break;
+		} else
+			value <<= 3;
+	}
+	if (range == 4) {
+		range = 3;
+		increment = 1;
+	} else
+		increment = (value + (value >> 1)) / us;
+	return (range << 6) | (increment & 0x3f);
+}
+
+#endif  /*  0  */
+
+unsigned short snd_gf1_translate_freq(struct snd_gus_card * gus, unsigned int freq16)
+{
+	freq16 >>= 3;
+	if (freq16 < 50)
+		freq16 = 50;
+	if (freq16 & 0xf8000000) {
+		freq16 = ~0xf8000000;
+		snd_printk(KERN_ERR "snd_gf1_translate_freq: overflow - freq = 0x%x\n", freq16);
+	}
+	return ((freq16 << 9) + (gus->gf1.playback_freq >> 1)) / gus->gf1.playback_freq;
+}
+
+#if 0
+
+short snd_gf1_compute_vibrato(short cents, unsigned short fc_register)
+{
+	static const short vibrato_table[] =
+	{
+		0, 0, 32, 592, 61, 1175, 93, 1808,
+		124, 2433, 152, 3007, 182, 3632, 213, 4290,
+		241, 4834, 255, 5200
+	};
+
+	long depth;
+	const short *vi1, *vi2;
+	short pcents, v1;
+
+	pcents = cents < 0 ? -cents : cents;
+	for (vi1 = vibrato_table, vi2 = vi1 + 2; pcents > *vi2; vi1 = vi2, vi2 += 2);
+	v1 = *(vi1 + 1);
+	/* The FC table above is a list of pairs. The first number in the pair     */
+	/* is the cents index from 0-255 cents, and the second number in the       */
+	/* pair is the FC adjustment needed to change the pitch by the indexed     */
+	/* number of cents. The table was created for an FC of 32768.              */
+	/* The following expression does a linear interpolation against the        */
+	/* approximated log curve in the table above, and then scales the number   */
+	/* by the FC before the LFO. This calculation also adjusts the output      */
+	/* value to produce the appropriate depth for the hardware. The depth      */
+	/* is 2 * desired FC + 1.                                                  */
+	depth = (((int) (*(vi2 + 1) - *vi1) * (pcents - *vi1) / (*vi2 - *vi1)) + v1) * fc_register >> 14;
+	if (depth)
+		depth++;
+	if (depth > 255)
+		depth = 255;
+	return cents < 0 ? -(short) depth : (short) depth;
+}
+
+unsigned short snd_gf1_compute_pitchbend(unsigned short pitchbend, unsigned short sens)
+{
+	static const long log_table[] = {1024, 1085, 1149, 1218, 1290, 1367, 1448, 1534, 1625, 1722, 1825, 1933};
+	int wheel, sensitivity;
+	unsigned int mantissa, f1, f2;
+	unsigned short semitones, f1_index, f2_index, f1_power, f2_power;
+	char bend_down = 0;
+	int bend;
+
+	if (!sens)
+		return 1024;
+	wheel = (int) pitchbend - 8192;
+	sensitivity = ((int) sens * wheel) / 128;
+	if (sensitivity < 0) {
+		bend_down = 1;
+		sensitivity = -sensitivity;
+	}
+	semitones = (unsigned int) (sensitivity >> 13);
+	mantissa = sensitivity % 8192;
+	f1_index = semitones % 12;
+	f2_index = (semitones + 1) % 12;
+	f1_power = semitones / 12;
+	f2_power = (semitones + 1) / 12;
+	f1 = log_table[f1_index] << f1_power;
+	f2 = log_table[f2_index] << f2_power;
+	bend = (int) ((((f2 - f1) * mantissa) >> 13) + f1);
+	if (bend_down)
+		bend = 1048576L / bend;
+	return bend;
+}
+
+unsigned short snd_gf1_compute_freq(unsigned int freq,
+				    unsigned int rate,
+				    unsigned short mix_rate)
+{
+	unsigned int fc;
+	int scale = 0;
+
+	while (freq >= 4194304L) {
+		scale++;
+		freq >>= 1;
+	}
+	fc = (freq << 10) / rate;
+	if (fc > 97391L) {
+		fc = 97391;
+		snd_printk(KERN_ERR "patch: (1) fc frequency overflow - %u\n", fc);
+	}
+	fc = (fc * 44100UL) / mix_rate;
+	while (scale--)
+		fc <<= 1;
+	if (fc > 65535L) {
+		fc = 65535;
+		snd_printk(KERN_ERR "patch: (2) fc frequency overflow - %u\n", fc);
+	}
+	return (unsigned short) fc;
+}
+
+#endif  /*  0  */