Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 210 insertions, 0 deletions

diff --git a/sound/isa/gus/gus_volume.c b/sound/isa/gus/gus_volume.c
new file mode 100644
index 000000000000..b72bcfb28617
--- /dev/null
+++ b/sound/isa/gus/gus_volume.c
@@ -0,0 +1,210 @@
+/*
+ *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <sound/driver.h>
+#include <linux/time.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;
+}
+
+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(snd_gus_card_t * gus,
+                                    unsigned short start,
+                                    unsigned short end,
+                                    unsigned int us)
+{
+        static 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);
+}
+
+unsigned short snd_gf1_translate_freq(snd_gus_card_t * gus, unsigned int freq16)
+{
+        freq16 >>= 3;
+        if (freq16 < 50)
+                freq16 = 50;
+        if (freq16 & 0xf8000000) {
+                freq16 = ~0xf8000000;
+                snd_printk("snd_gf1_translate_freq: overflow - freq = 0x%x\n", freq16);
+        }
+        return ((freq16 << 9) + (gus->gf1.playback_freq >> 1)) / gus->gf1.playback_freq;
+}
+
+short snd_gf1_compute_vibrato(short cents, unsigned short fc_register)
+{
+        static 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;
+        short *vi1, *vi2, 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 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("patch: (1) fc frequency overflow - %u\n", fc);
+        }
+        fc = (fc * 44100UL) / mix_rate;
+        while (scale--)
+                fc <<= 1;
+        if (fc > 65535L) {
+                fc = 65535;
+                snd_printk("patch: (2) fc frequency overflow - %u\n", fc);
+        }
+        return (unsigned short) fc;
+}