ref: 0ecff9d8c61d217c25a5857eb853a3955df53108
parent: 788a88b7f53da9af5750eda73e493ba9670328e5
author: robs <robs>
date: Wed Apr 1 05:16:40 EDT 2009
experimental divide effect
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -28,17 +28,17 @@
# Format with: !xargs echo|tr ' ' '\n'|sort|column|expand|sed 's/^/ /'
set(effects_srcs
- bend dither input rate stats
- biquad earwax loudness remix stretch
- biquads echo mcompand repeat swap
- chorus echos mixer reverb synth
- compand fade noiseprof reverse tempo
- compandt fft4g noisered silence tremolo
- contrast filter output sinc trim
- crop fir overdrive skeleff vol
- dcshift firfit pad speed
- delay flanger pan splice
- dft_filter gain phaser stat
+ bend dither gain phaser stat
+ biquad divide input rate stats
+ biquads earwax loudness remix stretch
+ chorus echo mcompand repeat swap
+ compand echos mixer reverb synth
+ compandt fade noiseprof reverse tempo
+ contrast fft4g noisered silence tremolo
+ crop filter output sinc trim
+ dcshift fir overdrive skeleff vol
+ delay firfit pad speed
+ dft_filter flanger pan splice
)
set(formats_srcs
8svx dat ima-fmt s3-fmt u3-fmt
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -59,7 +59,7 @@
libsox_la_SOURCES += \
band.h bend.c biquad.c biquad.h biquads.c chorus.c compand.c crop.c \
compandt.c compandt.h contrast.c dcshift.c delay.c dft_filter.c \
- dft_filter.h dither.c dither.h earwax.c echo.c \
+ dft_filter.h dither.c dither.h divide.c earwax.c echo.c \
echos.c effects.c effects.h effects_i.c effects_i_dsp.c fade.c fft4g.c \
fft4g.h fifo.h filter.c fir.c firfit.c flanger.c gain.c input.c \
ladspa.c loudness.c mcompand.c mcompand_xover.h mixer.c noiseprof.c \
--- /dev/null
+++ b/src/divide.c
@@ -1,0 +1,68 @@
+/* libSoX effect: divide Copyright (c) 2009 robs@users.sourceforge.net
+ *
+ * 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
+ */
+
+#include "sox_i.h"
+#include <string.h>
+
+typedef struct {+ sox_sample_t * last;
+} priv_t;
+
+static int start(sox_effect_t * effp)
+{+ priv_t * p = (priv_t *)effp->priv;
+ p->last = lsx_calloc(effp->in_signal.channels, sizeof(*p->last));
+ return SOX_SUCCESS;
+}
+
+static int flow(sox_effect_t * effp, const sox_sample_t * ibuf,
+ sox_sample_t * obuf, size_t * isamp, size_t * osamp)
+{+ priv_t * p = (priv_t *)effp->priv;
+ size_t i, len = min(*isamp, *osamp) / effp->in_signal.channels;
+ *osamp = *isamp = len * effp->in_signal.channels;
+
+ while (len--) {+ double divisor = *obuf++ = *ibuf++;
+ if (divisor) {+ double out, mult = 1. / SOX_SAMPLE_TO_FLOAT_64BIT(divisor,);
+ for (i = 1; i < effp->in_signal.channels; ++i) {+ out = *ibuf++ * mult;
+ p->last[i] = *obuf++ = SOX_ROUND_CLIP_COUNT(out, effp->clips);
+ }
+ }
+ else for (i = 1; i < effp->in_signal.channels; ++i, ++ibuf)
+ *obuf++ = p->last[i];
+ }
+ return SOX_SUCCESS;
+}
+
+static int stop(sox_effect_t * effp)
+{+ priv_t * p = (priv_t *)effp->priv;
+ free(p->last);
+ return SOX_SUCCESS;
+}
+
+sox_effect_handler_t const * lsx_divide_effect_fn(void)
+{+ static sox_effect_handler_t handler = {+ "divide", NULL, SOX_EFF_MCHAN | SOX_EFF_GAIN | SOX_EFF_DEPRECATED,
+ NULL, start, flow, NULL, stop, NULL, sizeof(priv_t)
+ };
+ return &handler;
+}
--- a/src/effects.h
+++ b/src/effects.h
@@ -30,6 +30,7 @@
EFFECT(delay)
EFFECT(dft_filter) /* abstract */
EFFECT(dither)
+ EFFECT(divide)
EFFECT(earwax)
EFFECT(echo)
EFFECT(echos)