diff options
author | Chris Robinson <[email protected]> | 2010-03-18 14:23:31 -0700 |
---|---|---|
committer | Chris Robinson <[email protected]> | 2010-03-18 14:23:31 -0700 |
commit | e1965fe7d90a2dee4f60907500947d411d39dd49 (patch) | |
tree | 3cb49be710045882a82cad6d7d12159ce1711bb9 /Alc | |
parent | 781444d12c6dc5d37a78fbbc8c9f6c24e1f3bc4d (diff) |
Convert CR/LF -> LF
Spotted by Alam Arias
Diffstat (limited to 'Alc')
-rw-r--r-- | Alc/bs2b.c | 402 |
1 files changed, 201 insertions, 201 deletions
@@ -1,201 +1,201 @@ -/*-
- * Copyright (c) 2005 Boris Mikhaylov
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include "config.h"
-
-#include <math.h>
-
-#include "bs2b.h"
-
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-/* Single pole IIR filter.
- * O[n] = a0*I[n] + a1*I[n-1] + b1*O[n-1]
- */
-
-/* Lowpass filter */
-#define lo_filter(in, out_1) (bs2b->a0_lo*(in) + bs2b->b1_lo*(out_1))
-
-/* Highboost filter */
-#define hi_filter(in, in_1, out_1) (bs2b->a0_hi*(in) + bs2b->a1_hi*(in_1) + bs2b->b1_hi*(out_1))
-
-/* Set up all data. */
-static void init(struct bs2b *bs2b)
-{
- double Fc_lo, Fc_hi;
- double G_lo, G_hi;
- double x;
-
- if ((bs2b->srate > 192000) || (bs2b->srate < 2000))
- bs2b->srate = BS2B_DEFAULT_SRATE;
-
- switch(bs2b->level)
- {
- case BS2B_LOW_CLEVEL: /* Low crossfeed level */
- Fc_lo = 360.0;
- Fc_hi = 501.0;
- G_lo = 0.398107170553497;
- G_hi = 0.205671765275719;
- break;
-
- case BS2B_MIDDLE_CLEVEL: /* Middle crossfeed level */
- Fc_lo = 500.0;
- Fc_hi = 711.0;
- G_lo = 0.459726988530872;
- G_hi = 0.228208484414988;
- break;
-
- case BS2B_HIGH_CLEVEL: /* High crossfeed level (virtual speakers are closer to itself) */
- Fc_lo = 700.0;
- Fc_hi = 1021.0;
- G_lo = 0.530884444230988;
- G_hi = 0.250105790667544;
- break;
-
- case BS2B_LOW_ECLEVEL: /* Low easy crossfeed level */
- Fc_lo = 360.0;
- Fc_hi = 494.0;
- G_lo = 0.316227766016838;
- G_hi = 0.168236228897329;
- break;
-
- case BS2B_MIDDLE_ECLEVEL: /* Middle easy crossfeed level */
- Fc_lo = 500.0;
- Fc_hi = 689.0;
- G_lo = 0.354813389233575;
- G_hi = 0.187169483835901;
- break;
-
- default: /* High easy crossfeed level */
- bs2b->level = BS2B_HIGH_ECLEVEL;
-
- Fc_lo = 700.0;
- Fc_hi = 975.0;
- G_lo = 0.398107170553497;
- G_hi = 0.205671765275719;
- break;
- } /* switch */
-
- /* $fc = $Fc / $s;
- * $d = 1 / 2 / pi / $fc;
- * $x = exp(-1 / $d);
- */
-
- x = exp(-2.0 * M_PI * Fc_lo / bs2b->srate);
- bs2b->b1_lo = x;
- bs2b->a0_lo = G_lo * (1.0 - x);
-
- x = exp(-2.0 * M_PI * Fc_hi / bs2b->srate);
- bs2b->b1_hi = x;
- bs2b->a0_hi = 1.0 - G_hi * (1.0 - x);
- bs2b->a1_hi = -x;
-
- bs2b->gain = 1.0 / (1.0 - G_hi + G_lo);
-} /* init */
-
-/* Exported functions.
- * See descriptions in "bs2b.h"
- */
-
-void bs2b_set_level(struct bs2b *bs2b, int level)
-{
- if(level == bs2b->level)
- return;
- bs2b->level = level;
- init(bs2b);
-} /* bs2b_set_level */
-
-int bs2b_get_level(struct bs2b *bs2b)
-{
- return bs2b->level;
-} /* bs2b_get_level */
-
-void bs2b_set_srate(struct bs2b *bs2b, int srate)
-{
- if (srate == bs2b->srate)
- return;
- bs2b->srate = srate;
- init(bs2b);
-} /* bs2b_set_srate */
-
-int bs2b_get_srate(struct bs2b *bs2b)
-{
- return bs2b->srate;
-} /* bs2b_get_srate */
-
-void bs2b_clear(struct bs2b *bs2b)
-{
- int loopv = sizeof(bs2b->last_sample);
-
- while (loopv)
- {
- ((char *)&bs2b->last_sample)[--loopv] = 0;
- }
-} /* bs2b_clear */
-
-int bs2b_is_clear(struct bs2b *bs2b)
-{
- int loopv = sizeof(bs2b->last_sample);
-
- while (loopv)
- {
- if (((char *)&bs2b->last_sample)[--loopv] != 0)
- return 0;
- }
- return 1;
-} /* bs2b_is_clear */
-
-void bs2b_cross_feed(struct bs2b *bs2b, float *sample)
-{
- /* Lowpass filter */
- bs2b->last_sample.lo[0] = lo_filter(sample[0], bs2b->last_sample.lo[0]);
- bs2b->last_sample.lo[1] = lo_filter(sample[1], bs2b->last_sample.lo[1]);
-
- /* Highboost filter */
- bs2b->last_sample.hi[0] = hi_filter(sample[0], bs2b->last_sample.asis[0], bs2b->last_sample.hi[0]);
- bs2b->last_sample.hi[1] = hi_filter(sample[1], bs2b->last_sample.asis[1], bs2b->last_sample.hi[1]);
- bs2b->last_sample.asis[0] = sample[0];
- bs2b->last_sample.asis[1] = sample[1];
-
- /* Crossfeed */
- sample[0] = bs2b->last_sample.hi[0] + bs2b->last_sample.lo[1];
- sample[1] = bs2b->last_sample.hi[1] + bs2b->last_sample.lo[0];
-
- /* Bass boost cause allpass attenuation */
- sample[0] *= bs2b->gain;
- sample[1] *= bs2b->gain;
-
- /* Clipping of overloaded samples */
-#if 0
- if (sample[0] > 1.0)
- sample[0] = 1.0;
- if (sample[0] < -1.0)
- sample[0] = -1.0;
- if (sample[1] > 1.0)
- sample[1] = 1.0;
- if (sample[1] < -1.0)
- sample[1] = -1.0;
-#endif
-} /* bs2b_cross_feed */
+/*- + * Copyright (c) 2005 Boris Mikhaylov + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY + * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include "config.h" + +#include <math.h> + +#include "bs2b.h" + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +/* Single pole IIR filter. + * O[n] = a0*I[n] + a1*I[n-1] + b1*O[n-1] + */ + +/* Lowpass filter */ +#define lo_filter(in, out_1) (bs2b->a0_lo*(in) + bs2b->b1_lo*(out_1)) + +/* Highboost filter */ +#define hi_filter(in, in_1, out_1) (bs2b->a0_hi*(in) + bs2b->a1_hi*(in_1) + bs2b->b1_hi*(out_1)) + +/* Set up all data. */ +static void init(struct bs2b *bs2b) +{ + double Fc_lo, Fc_hi; + double G_lo, G_hi; + double x; + + if ((bs2b->srate > 192000) || (bs2b->srate < 2000)) + bs2b->srate = BS2B_DEFAULT_SRATE; + + switch(bs2b->level) + { + case BS2B_LOW_CLEVEL: /* Low crossfeed level */ + Fc_lo = 360.0; + Fc_hi = 501.0; + G_lo = 0.398107170553497; + G_hi = 0.205671765275719; + break; + + case BS2B_MIDDLE_CLEVEL: /* Middle crossfeed level */ + Fc_lo = 500.0; + Fc_hi = 711.0; + G_lo = 0.459726988530872; + G_hi = 0.228208484414988; + break; + + case BS2B_HIGH_CLEVEL: /* High crossfeed level (virtual speakers are closer to itself) */ + Fc_lo = 700.0; + Fc_hi = 1021.0; + G_lo = 0.530884444230988; + G_hi = 0.250105790667544; + break; + + case BS2B_LOW_ECLEVEL: /* Low easy crossfeed level */ + Fc_lo = 360.0; + Fc_hi = 494.0; + G_lo = 0.316227766016838; + G_hi = 0.168236228897329; + break; + + case BS2B_MIDDLE_ECLEVEL: /* Middle easy crossfeed level */ + Fc_lo = 500.0; + Fc_hi = 689.0; + G_lo = 0.354813389233575; + G_hi = 0.187169483835901; + break; + + default: /* High easy crossfeed level */ + bs2b->level = BS2B_HIGH_ECLEVEL; + + Fc_lo = 700.0; + Fc_hi = 975.0; + G_lo = 0.398107170553497; + G_hi = 0.205671765275719; + break; + } /* switch */ + + /* $fc = $Fc / $s; + * $d = 1 / 2 / pi / $fc; + * $x = exp(-1 / $d); + */ + + x = exp(-2.0 * M_PI * Fc_lo / bs2b->srate); + bs2b->b1_lo = x; + bs2b->a0_lo = G_lo * (1.0 - x); + + x = exp(-2.0 * M_PI * Fc_hi / bs2b->srate); + bs2b->b1_hi = x; + bs2b->a0_hi = 1.0 - G_hi * (1.0 - x); + bs2b->a1_hi = -x; + + bs2b->gain = 1.0 / (1.0 - G_hi + G_lo); +} /* init */ + +/* Exported functions. + * See descriptions in "bs2b.h" + */ + +void bs2b_set_level(struct bs2b *bs2b, int level) +{ + if(level == bs2b->level) + return; + bs2b->level = level; + init(bs2b); +} /* bs2b_set_level */ + +int bs2b_get_level(struct bs2b *bs2b) +{ + return bs2b->level; +} /* bs2b_get_level */ + +void bs2b_set_srate(struct bs2b *bs2b, int srate) +{ + if (srate == bs2b->srate) + return; + bs2b->srate = srate; + init(bs2b); +} /* bs2b_set_srate */ + +int bs2b_get_srate(struct bs2b *bs2b) +{ + return bs2b->srate; +} /* bs2b_get_srate */ + +void bs2b_clear(struct bs2b *bs2b) +{ + int loopv = sizeof(bs2b->last_sample); + + while (loopv) + { + ((char *)&bs2b->last_sample)[--loopv] = 0; + } +} /* bs2b_clear */ + +int bs2b_is_clear(struct bs2b *bs2b) +{ + int loopv = sizeof(bs2b->last_sample); + + while (loopv) + { + if (((char *)&bs2b->last_sample)[--loopv] != 0) + return 0; + } + return 1; +} /* bs2b_is_clear */ + +void bs2b_cross_feed(struct bs2b *bs2b, float *sample) +{ + /* Lowpass filter */ + bs2b->last_sample.lo[0] = lo_filter(sample[0], bs2b->last_sample.lo[0]); + bs2b->last_sample.lo[1] = lo_filter(sample[1], bs2b->last_sample.lo[1]); + + /* Highboost filter */ + bs2b->last_sample.hi[0] = hi_filter(sample[0], bs2b->last_sample.asis[0], bs2b->last_sample.hi[0]); + bs2b->last_sample.hi[1] = hi_filter(sample[1], bs2b->last_sample.asis[1], bs2b->last_sample.hi[1]); + bs2b->last_sample.asis[0] = sample[0]; + bs2b->last_sample.asis[1] = sample[1]; + + /* Crossfeed */ + sample[0] = bs2b->last_sample.hi[0] + bs2b->last_sample.lo[1]; + sample[1] = bs2b->last_sample.hi[1] + bs2b->last_sample.lo[0]; + + /* Bass boost cause allpass attenuation */ + sample[0] *= bs2b->gain; + sample[1] *= bs2b->gain; + + /* Clipping of overloaded samples */ +#if 0 + if (sample[0] > 1.0) + sample[0] = 1.0; + if (sample[0] < -1.0) + sample[0] = -1.0; + if (sample[1] > 1.0) + sample[1] = 1.0; + if (sample[1] < -1.0) + sample[1] = -1.0; +#endif +} /* bs2b_cross_feed */ |