--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2011 Stefan Sauer <ensonic@users.sf.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+/*
+ * Freeverb
+ *
+ * Written by Jezar at Dreampoint, June 2000
+ * http://www.dreampoint.co.uk
+ * This code is public domain
+ *
+ * Translated to C by Peter Hanappe, Mai 2001
+ * Transformed into a GStreamer plugin by Stefan Sauer, Nov 2011
+ */
+
+/**
+ * SECTION:element-freeverb
+ *
+ * Reverberation/room effect.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch audiotestsrc wave=saw ! freeverb ! autoaudiosink
+ * gst-launch filesrc location="melo1.ogg" ! decodebin ! audioconvert ! freeverb ! autoaudiosink
+ * ]|
+ * </refsect2>
+ */
+
+/* FIXME:
+ * - add mono-to-mono, then we might also need stereo-to-mono ?
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <math.h>
+#include <stdlib.h>
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+#include <gst/controller/gstcontroller.h>
+
+#include "gstfreeverb.h"
+
+#define GST_CAT_DEFAULT gst_freeverb_debug
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
+
+enum
+{
+ PROP_0,
+ PROP_ROOM_SIZE,
+ PROP_DAMPING,
+ PROP_PAN_WIDTH,
+ PROP_LEVEL
+};
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-float, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, " "width = (int) 32; "
+ "audio/x-raw-int, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
+ );
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-float, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) 2, "
+ "endianness = (int) BYTE_ORDER, " "width = (int) 32; "
+ "audio/x-raw-int, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) 2, "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
+ );
+
+#define _do_init(type) { \
+ const GInterfaceInfo preset_interface_info = { NULL, NULL, NULL }; \
+ g_type_add_interface_static (type, GST_TYPE_PRESET, &preset_interface_info); \
+ \
+ GST_DEBUG_CATEGORY_INIT (gst_freeverb_debug, "freeverb", 0, \
+ "freeverb element"); \
+}
+
+GST_BOILERPLATE_FULL (GstFreeverb, gst_freeverb, GstBaseTransform,
+ GST_TYPE_BASE_TRANSFORM, _do_init);
+
+static void gst_freeverb_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_freeverb_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static void gst_freeverb_finalize (GObject * object);
+
+static gboolean gst_freeverb_get_unit_size (GstBaseTransform * base,
+ GstCaps * caps, guint * size);
+static GstCaps *gst_freeverb_transform_caps (GstBaseTransform * base,
+ GstPadDirection direction, GstCaps * caps);
+static gboolean gst_freeverb_set_caps (GstBaseTransform * base,
+ GstCaps * incaps, GstCaps * outcaps);
+
+static GstFlowReturn gst_freeverb_transform (GstBaseTransform * base,
+ GstBuffer * inbuf, GstBuffer * outbuf);
+
+static gboolean gst_freeverb_transform_m2s_int (GstFreeverb * filter,
+ gint16 * idata, gint16 * odata, guint num_samples);
+static gboolean gst_freeverb_transform_s2s_int (GstFreeverb * filter,
+ gint16 * idata, gint16 * odata, guint num_samples);
+static gboolean gst_freeverb_transform_m2s_float (GstFreeverb * filter,
+ gfloat * idata, gfloat * odata, guint num_samples);
+static gboolean gst_freeverb_transform_s2s_float (GstFreeverb * filter,
+ gfloat * idata, gfloat * odata, guint num_samples);
+
+
+/* Table with processing functions: [channels][format] */
+static GstFreeverbProcessFunc process_functions[2][2] = {
+ {
+ (GstFreeverbProcessFunc) gst_freeverb_transform_m2s_int,
+ (GstFreeverbProcessFunc) gst_freeverb_transform_m2s_float,
+ },
+ {
+ (GstFreeverbProcessFunc) gst_freeverb_transform_s2s_int,
+ (GstFreeverbProcessFunc) gst_freeverb_transform_s2s_float,
+ }
+};
+
+/***************************************************************
+ *
+ * REVERB
+ */
+
+/* Denormalising:
+ *
+ * Another method fixes the problem cheaper: Use a small DC-offset in
+ * the filter calculations. Now the signals converge not against 0,
+ * but against the offset. The constant offset is invisible from the
+ * outside world (i.e. it does not appear at the output. There is a
+ * very small turn-on transient response, which should not cause
+ * problems.
+ */
+
+//#define DC_OFFSET 0
+#define DC_OFFSET 1e-8
+//#define DC_OFFSET 0.001f
+
+/* all pass filter */
+
+typedef struct _freeverb_allpass
+{
+ gfloat feedback;
+ gfloat *buffer;
+ gint bufsize;
+ gint bufidx;
+} freeverb_allpass;
+
+static void
+freeverb_allpass_setbuffer (freeverb_allpass * allpass, gint size)
+{
+ allpass->bufidx = 0;
+ allpass->buffer = g_new (gfloat, size);
+ allpass->bufsize = size;
+}
+
+static void
+freeverb_allpass_release (freeverb_allpass * allpass)
+{
+ g_free (allpass->buffer);
+}
+
+static void
+freeverb_allpass_init (freeverb_allpass * allpass)
+{
+ gint i, len = allpass->bufsize;
+ gfloat *buf = allpass->buffer;
+
+ for (i = 0; i < len; i++) {
+ buf[i] = DC_OFFSET; /* this is not 100 % correct. */
+ }
+}
+
+static void
+freeverb_allpass_setfeedback (freeverb_allpass * allpass, gfloat val)
+{
+ allpass->feedback = val;
+}
+
+/*
+static gfloat
+freeverb_allpass_getfeedback(freeverb_allpass* allpass)
+{
+ return allpass->feedback;
+}*/
+
+#define freeverb_allpass_process(_allpass, _input_1) \
+{ \
+ gfloat output; \
+ gfloat bufout; \
+ bufout = _allpass.buffer[_allpass.bufidx]; \
+ output = bufout-_input_1; \
+ _allpass.buffer[_allpass.bufidx] = _input_1 + (bufout * _allpass.feedback); \
+ if (++_allpass.bufidx >= _allpass.bufsize) { \
+ _allpass.bufidx = 0; \
+ } \
+ _input_1 = output; \
+}
+
+/* comb filter */
+
+typedef struct _freeverb_comb
+{
+ gfloat feedback;
+ gfloat filterstore;
+ gfloat damp1;
+ gfloat damp2;
+ gfloat *buffer;
+ gint bufsize;
+ gint bufidx;
+} freeverb_comb;
+
+static void
+freeverb_comb_setbuffer (freeverb_comb * comb, gint size)
+{
+ comb->filterstore = 0;
+ comb->bufidx = 0;
+ comb->buffer = g_new (gfloat, size);
+ comb->bufsize = size;
+}
+
+static void
+freeverb_comb_release (freeverb_comb * comb)
+{
+ g_free (comb->buffer);
+}
+
+static void
+freeverb_comb_init (freeverb_comb * comb)
+{
+ gint i, len = comb->bufsize;
+ gfloat *buf = comb->buffer;
+
+ for (i = 0; i < len; i++) {
+ buf[i] = DC_OFFSET; /* This is not 100 % correct. */
+ }
+}
+
+static void
+freeverb_comb_setdamp (freeverb_comb * comb, gfloat val)
+{
+ comb->damp1 = val;
+ comb->damp2 = 1 - val;
+}
+
+/*
+static gfloat
+freeverb_comb_getdamp(freeverb_comb* comb)
+{
+ return comb->damp1;
+}*/
+
+static void
+freeverb_comb_setfeedback (freeverb_comb * comb, gfloat val)
+{
+ comb->feedback = val;
+}
+
+/*
+static gfloat
+freeverb_comb_getfeedback(freeverb_comb* comb)
+{
+ return comb->feedback;
+}*/
+
+#define freeverb_comb_process(_comb, _input_1, _output) \
+{ \
+ gfloat _tmp = _comb.buffer[_comb.bufidx]; \
+ _comb.filterstore = (_tmp * _comb.damp2) + (_comb.filterstore * _comb.damp1); \
+ _comb.buffer[_comb.bufidx] = _input_1 + (_comb.filterstore * _comb.feedback); \
+ if (++_comb.bufidx >= _comb.bufsize) { \
+ _comb.bufidx = 0; \
+ } \
+ _output += _tmp; \
+}
+
+#define numcombs 8
+#define numallpasses 4
+#define fixedgain 0.015f
+#define scalewet 1.0f
+#define scaledry 1.0f
+#define scaledamp 1.0f
+#define scaleroom 0.28f
+#define offsetroom 0.7f
+#define stereospread 23
+
+/* These values assume 44.1KHz sample rate
+ * they will need scaling for 96KHz (or other) sample rates.
+ * The values were obtained by listening tests.
+ */
+#define combtuningL1 1116
+#define combtuningR1 (1116 + stereospread)
+#define combtuningL2 1188
+#define combtuningR2 (1188 + stereospread)
+#define combtuningL3 1277
+#define combtuningR3 (1277 + stereospread)
+#define combtuningL4 1356
+#define combtuningR4 (1356 + stereospread)
+#define combtuningL5 1422
+#define combtuningR5 (1422 + stereospread)
+#define combtuningL6 1491
+#define combtuningR6 (1491 + stereospread)
+#define combtuningL7 1557
+#define combtuningR7 (1557 + stereospread)
+#define combtuningL8 1617
+#define combtuningR8 (1617 + stereospread)
+#define allpasstuningL1 556
+#define allpasstuningR1 (556 + stereospread)
+#define allpasstuningL2 441
+#define allpasstuningR2 (441 + stereospread)
+#define allpasstuningL3 341
+#define allpasstuningR3 (341 + stereospread)
+#define allpasstuningL4 225
+#define allpasstuningR4 (225 + stereospread)
+
+struct _GstFreeverbPrivate
+{
+ gfloat roomsize;
+ gfloat damp;
+ gfloat wet, wet1, wet2, dry;
+ gfloat width;
+ gfloat gain;
+ /*
+ The following are all declared inline
+ to remove the need for dynamic allocation
+ with its subsequent error-checking messiness
+ */
+ /* Comb filters */
+ freeverb_comb combL[numcombs];
+ freeverb_comb combR[numcombs];
+ /* Allpass filters */
+ freeverb_allpass allpassL[numallpasses];
+ freeverb_allpass allpassR[numallpasses];
+};
+
+static void
+freeverb_revmodel_init (GstFreeverb * filter)
+{
+ GstFreeverbPrivate *priv = filter->priv;
+ gint i;
+
+ for (i = 0; i < numcombs; i++) {
+ freeverb_comb_init (&priv->combL[i]);
+ freeverb_comb_init (&priv->combR[i]);
+ }
+ for (i = 0; i < numallpasses; i++) {
+ freeverb_allpass_init (&priv->allpassL[i]);
+ freeverb_allpass_init (&priv->allpassR[i]);
+ }
+}
+
+static void
+freeverb_revmodel_free (GstFreeverb * filter)
+{
+ GstFreeverbPrivate *priv = filter->priv;
+ gint i;
+
+ for (i = 0; i < numcombs; i++) {
+ freeverb_comb_release (&priv->combL[i]);
+ freeverb_comb_release (&priv->combR[i]);
+ }
+ for (i = 0; i < numallpasses; i++) {
+ freeverb_allpass_release (&priv->allpassL[i]);
+ freeverb_allpass_release (&priv->allpassR[i]);
+ }
+}
+
+/* GObject vmethod implementations */
+
+static void
+gst_freeverb_base_init (gpointer klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_template));
+ gst_element_class_set_details_simple (element_class, "Stereo positioning",
+ "Filter/Effect/Audio",
+ "Reverberation/room effect", "Stefan Sauer <ensonic@users.sf.net>");
+}
+
+static void
+gst_freeverb_class_init (GstFreeverbClass * klass)
+{
+ GObjectClass *gobject_class;
+
+ g_type_class_add_private (klass, sizeof (GstFreeverbPrivate));
+
+ gobject_class = (GObjectClass *) klass;
+ gobject_class->set_property = gst_freeverb_set_property;
+ gobject_class->get_property = gst_freeverb_get_property;
+ gobject_class->finalize = gst_freeverb_finalize;
+
+ g_object_class_install_property (gobject_class, PROP_ROOM_SIZE,
+ g_param_spec_float ("room-size", "Room size",
+ "Size of the simulated room", 0.0, 1.0, 0.5,
+ G_PARAM_CONSTRUCT | G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE |
+ G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, PROP_DAMPING,
+ g_param_spec_float ("damping", "Damping", "Damping of high frequencies",
+ 0.0, 1.0, 0.2,
+ G_PARAM_CONSTRUCT | G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE |
+ G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, PROP_PAN_WIDTH,
+ g_param_spec_float ("width", "Width", "Stereo panorama width", 0.0, 1.0,
+ 1.0,
+ G_PARAM_CONSTRUCT | G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE |
+ G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, PROP_LEVEL,
+ g_param_spec_float ("level", "Level", "dry/wet level", 0.0, 1.0, 0.5,
+ G_PARAM_CONSTRUCT | G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE |
+ G_PARAM_STATIC_STRINGS));
+
+ GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size =
+ GST_DEBUG_FUNCPTR (gst_freeverb_get_unit_size);
+ GST_BASE_TRANSFORM_CLASS (klass)->transform_caps =
+ GST_DEBUG_FUNCPTR (gst_freeverb_transform_caps);
+ GST_BASE_TRANSFORM_CLASS (klass)->set_caps =
+ GST_DEBUG_FUNCPTR (gst_freeverb_set_caps);
+ GST_BASE_TRANSFORM_CLASS (klass)->transform =
+ GST_DEBUG_FUNCPTR (gst_freeverb_transform);
+}
+
+static void
+gst_freeverb_init (GstFreeverb * filter, GstFreeverbClass * klass)
+{
+ filter->priv =
+ G_TYPE_INSTANCE_GET_PRIVATE (filter, GST_TYPE_FREEVERB,
+ GstFreeverbPrivate);
+
+ filter->width = 0;
+ filter->channels = 0;
+ filter->format_float = FALSE;
+ filter->process = NULL;
+
+ gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (filter), TRUE);
+
+ freeverb_revmodel_init (filter);
+}
+
+static void
+gst_freeverb_finalize (GObject * object)
+{
+ GstFreeverb *filter = GST_FREEVERB (object);
+
+ freeverb_revmodel_free (filter);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gst_freeverb_set_process_function (GstFreeverb * filter)
+{
+ gint channel_index, format_index;
+
+ /* set processing function */
+ channel_index = filter->channels - 1;
+ if (channel_index > 1 || channel_index < 0) {
+ filter->process = NULL;
+ return FALSE;
+ }
+
+ format_index = (filter->format_float) ? 1 : 0;
+
+ filter->process = process_functions[channel_index][format_index];
+
+ g_assert (filter->process);
+ return TRUE;
+}
+
+static void
+gst_freeverb_init_rev_model (GstFreeverb * filter)
+{
+ gfloat srfactor = filter->rate / 44100.0f;
+ GstFreeverbPrivate *priv = filter->priv;
+
+ freeverb_revmodel_free (filter);
+
+ priv->gain = fixedgain;
+
+ freeverb_comb_setbuffer (&priv->combL[0], combtuningL1 * srfactor);
+ freeverb_comb_setbuffer (&priv->combR[0], combtuningR1 * srfactor);
+ freeverb_comb_setbuffer (&priv->combL[1], combtuningL2 * srfactor);
+ freeverb_comb_setbuffer (&priv->combR[1], combtuningR2 * srfactor);
+ freeverb_comb_setbuffer (&priv->combL[2], combtuningL3 * srfactor);
+ freeverb_comb_setbuffer (&priv->combR[2], combtuningR3 * srfactor);
+ freeverb_comb_setbuffer (&priv->combL[3], combtuningL4 * srfactor);
+ freeverb_comb_setbuffer (&priv->combR[3], combtuningR4 * srfactor);
+ freeverb_comb_setbuffer (&priv->combL[4], combtuningL5 * srfactor);
+ freeverb_comb_setbuffer (&priv->combR[4], combtuningR5 * srfactor);
+ freeverb_comb_setbuffer (&priv->combL[5], combtuningL6 * srfactor);
+ freeverb_comb_setbuffer (&priv->combR[5], combtuningR6 * srfactor);
+ freeverb_comb_setbuffer (&priv->combL[6], combtuningL7 * srfactor);
+ freeverb_comb_setbuffer (&priv->combR[6], combtuningR7 * srfactor);
+ freeverb_comb_setbuffer (&priv->combL[7], combtuningL8 * srfactor);
+ freeverb_comb_setbuffer (&priv->combR[7], combtuningR8 * srfactor);
+ freeverb_allpass_setbuffer (&priv->allpassL[0], allpasstuningL1 * srfactor);
+ freeverb_allpass_setbuffer (&priv->allpassR[0], allpasstuningR1 * srfactor);
+ freeverb_allpass_setbuffer (&priv->allpassL[1], allpasstuningL2 * srfactor);
+ freeverb_allpass_setbuffer (&priv->allpassR[1], allpasstuningR2 * srfactor);
+ freeverb_allpass_setbuffer (&priv->allpassL[2], allpasstuningL3 * srfactor);
+ freeverb_allpass_setbuffer (&priv->allpassR[2], allpasstuningR3 * srfactor);
+ freeverb_allpass_setbuffer (&priv->allpassL[3], allpasstuningL4 * srfactor);
+ freeverb_allpass_setbuffer (&priv->allpassR[3], allpasstuningR4 * srfactor);
+
+ /* clear buffers */
+ freeverb_revmodel_init (filter);
+
+ /* set default values */
+ freeverb_allpass_setfeedback (&priv->allpassL[0], 0.5f);
+ freeverb_allpass_setfeedback (&priv->allpassR[0], 0.5f);
+ freeverb_allpass_setfeedback (&priv->allpassL[1], 0.5f);
+ freeverb_allpass_setfeedback (&priv->allpassR[1], 0.5f);
+ freeverb_allpass_setfeedback (&priv->allpassL[2], 0.5f);
+ freeverb_allpass_setfeedback (&priv->allpassR[2], 0.5f);
+ freeverb_allpass_setfeedback (&priv->allpassL[3], 0.5f);
+ freeverb_allpass_setfeedback (&priv->allpassR[3], 0.5f);
+}
+
+static void
+gst_freeverb_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstFreeverb *filter = GST_FREEVERB (object);
+ GstFreeverbPrivate *priv = filter->priv;
+ gint i;
+
+ switch (prop_id) {
+ case PROP_ROOM_SIZE:
+ filter->room_size = g_value_get_float (value);
+ priv->roomsize = (filter->room_size * scaleroom) + offsetroom;
+ for (i = 0; i < numcombs; i++) {
+ freeverb_comb_setfeedback (&priv->combL[i], priv->roomsize);
+ freeverb_comb_setfeedback (&priv->combR[i], priv->roomsize);
+ }
+ break;
+ case PROP_DAMPING:
+ filter->damping = g_value_get_float (value);
+ priv->damp = filter->damping * scaledamp;
+ for (i = 0; i < numcombs; i++) {
+ freeverb_comb_setdamp (&priv->combL[i], priv->damp);
+ freeverb_comb_setdamp (&priv->combR[i], priv->damp);
+ }
+ break;
+ case PROP_PAN_WIDTH:
+ filter->pan_width = g_value_get_float (value);
+ priv->width = filter->pan_width;
+ priv->wet1 = priv->wet * (priv->width / 2.0f + 0.5f);
+ priv->wet2 = priv->wet * ((1.0f - priv->width) / 2.0f);
+ break;
+ case PROP_LEVEL:
+ filter->level = g_value_get_float (value);
+ priv->wet = filter->level * scalewet;
+ priv->dry = (1.0 - filter->level) * scaledry;
+ priv->wet1 = priv->wet * (priv->width / 2.0f + 0.5f);
+ priv->wet2 = priv->wet * ((1.0f - priv->width) / 2.0f);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_freeverb_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstFreeverb *filter = GST_FREEVERB (object);
+
+ switch (prop_id) {
+ case PROP_ROOM_SIZE:
+ g_value_set_float (value, filter->room_size);
+ break;
+ case PROP_DAMPING:
+ g_value_set_float (value, filter->damping);
+ break;
+ case PROP_PAN_WIDTH:
+ g_value_set_float (value, filter->pan_width);
+ break;
+ case PROP_LEVEL:
+ g_value_set_float (value, filter->level);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* GstBaseTransform vmethod implementations */
+
+static gboolean
+gst_freeverb_get_unit_size (GstBaseTransform * base, GstCaps * caps,
+ guint * size)
+{
+ gint width, channels;
+ GstStructure *structure;
+ gboolean ret;
+
+ g_assert (size);
+
+ /* this works for both float and int */
+ structure = gst_caps_get_structure (caps, 0);
+ ret = gst_structure_get_int (structure, "width", &width);
+ ret &= gst_structure_get_int (structure, "channels", &channels);
+
+ *size = width * channels / 8;
+
+ GST_INFO_OBJECT (base, "unit size: %u", *size);
+
+ return ret;
+}
+
+static GstCaps *
+gst_freeverb_transform_caps (GstBaseTransform * base,
+ GstPadDirection direction, GstCaps * caps)
+{
+ GstCaps *res;
+ GstStructure *structure;
+
+ /* transform caps gives one single caps so we can just replace
+ * the channel property with our range. */
+ res = gst_caps_copy (caps);
+ structure = gst_caps_get_structure (res, 0);
+ if (direction == GST_PAD_SRC) {
+ GST_INFO_OBJECT (base, "allow 1-2 channels");
+ gst_structure_set (structure, "channels", GST_TYPE_INT_RANGE, 1, 2, NULL);
+ } else {
+ GST_INFO_OBJECT (base, "allow 2 channels");
+ gst_structure_set (structure, "channels", G_TYPE_INT, 2, NULL);
+ }
+
+ return res;
+}
+
+static gboolean
+gst_freeverb_set_caps (GstBaseTransform * base, GstCaps * incaps,
+ GstCaps * outcaps)
+{
+ GstFreeverb *filter = GST_FREEVERB (base);
+ const GstStructure *structure;
+ gboolean ret;
+ gint width, rate;
+ const gchar *fmt;
+
+ /*GST_INFO ("incaps are %" GST_PTR_FORMAT, incaps); */
+
+ structure = gst_caps_get_structure (incaps, 0);
+ ret = gst_structure_get_int (structure, "channels", &filter->channels);
+ if (!ret)
+ goto no_channels;
+
+ ret = gst_structure_get_int (structure, "width", &width);
+ if (!ret)
+ goto no_width;
+ filter->width = width / 8;
+
+ ret = gst_structure_get_int (structure, "rate", &rate);
+ if (!ret)
+ goto no_rate;
+ filter->rate = rate;
+
+ fmt = gst_structure_get_name (structure);
+ if (!strcmp (fmt, "audio/x-raw-int"))
+ filter->format_float = FALSE;
+ else
+ filter->format_float = TRUE;
+
+ GST_DEBUG_OBJECT (filter, "try to process %s input_1 with %d channels", fmt,
+ filter->channels);
+
+ ret = gst_freeverb_set_process_function (filter);
+ if (!ret)
+ GST_WARNING_OBJECT (filter, "can't process input_1 with %d channels",
+ filter->channels);
+
+ gst_freeverb_init_rev_model (filter);
+ filter->drained = FALSE;
+ GST_INFO_OBJECT (base, "model configured");
+
+ return ret;
+
+no_channels:
+ GST_DEBUG_OBJECT (filter, "no channels in caps");
+ return ret;
+no_width:
+ GST_DEBUG_OBJECT (filter, "no width in caps");
+ return ret;
+no_rate:
+ GST_DEBUG_OBJECT (filter, "no rate in caps");
+ return ret;
+}
+
+static gboolean
+gst_freeverb_transform_m2s_int (GstFreeverb * filter,
+ gint16 * idata, gint16 * odata, guint num_samples)
+{
+ GstFreeverbPrivate *priv = filter->priv;
+ gint i, k;
+ gfloat out_l1, out_r1, input_1;
+ gfloat out_l2, out_r2, input_2;
+ gboolean drained = TRUE;
+
+ for (k = 0; k < num_samples; k++) {
+
+ out_l1 = out_r1 = 0.0;
+
+ /* The original Freeverb code expects a stereo signal and 'input_1'
+ * is set to the sum of the left and right input_1 sample. Since
+ * this code works on a mono signal, 'input_1' is set to twice the
+ * input_1 sample. */
+ input_2 = (gfloat) * idata++;
+ input_1 = (2.0f * input_2 + DC_OFFSET) * priv->gain;
+
+ /* Accumulate comb filters in parallel */
+ for (i = 0; i < numcombs; i++) {
+ freeverb_comb_process (priv->combL[i], input_1, out_l1);
+ freeverb_comb_process (priv->combR[i], input_1, out_r1);
+ }
+ /* Feed through allpasses in series */
+ for (i = 0; i < numallpasses; i++) {
+ freeverb_allpass_process (priv->allpassL[i], out_l1);
+ freeverb_allpass_process (priv->allpassR[i], out_r1);
+ }
+
+ /* Remove the DC offset */
+ out_l1 -= DC_OFFSET;
+ out_r1 -= DC_OFFSET;
+
+ /* Calculate output */
+ out_l2 = out_l1 * priv->wet1 + out_r1 * priv->wet2 + input_2 * priv->dry;
+ out_r2 = out_r1 * priv->wet1 + out_l1 * priv->wet2 + input_2 * priv->dry;
+ *odata++ = (gint16) CLAMP (out_l2, G_MININT16, G_MAXINT16);
+ *odata++ = (gint16) CLAMP (out_r2, G_MININT16, G_MAXINT16);
+
+ if (abs (out_l2) > 0 || abs (out_r2) > 0)
+ drained = FALSE;
+ }
+ return drained;
+}
+
+static gboolean
+gst_freeverb_transform_s2s_int (GstFreeverb * filter,
+ gint16 * idata, gint16 * odata, guint num_samples)
+{
+ GstFreeverbPrivate *priv = filter->priv;
+ gint i, k;
+ gfloat out_l1, out_r1, input_1l, input_1r;
+ gfloat out_l2, out_r2, input_2l, input_2r;
+ gboolean drained = TRUE;
+
+ for (k = 0; k < num_samples; k++) {
+
+ out_l1 = out_r1 = 0.0;
+
+ input_2l = (gfloat) * idata++;
+ input_2r = (gfloat) * idata++;
+ input_1l = (input_2l + DC_OFFSET) * priv->gain;
+ input_1r = (input_2r + DC_OFFSET) * priv->gain;
+
+ /* Accumulate comb filters in parallel */
+ for (i = 0; i < numcombs; i++) {
+ freeverb_comb_process (priv->combL[i], input_1l, out_l1);
+ freeverb_comb_process (priv->combR[i], input_1r, out_r1);
+ }
+ /* Feed through allpasses in series */
+ for (i = 0; i < numallpasses; i++) {
+ freeverb_allpass_process (priv->allpassL[i], out_l1);
+ freeverb_allpass_process (priv->allpassR[i], out_r1);
+ }
+
+ /* Remove the DC offset */
+ out_l1 -= DC_OFFSET;
+ out_r1 -= DC_OFFSET;
+
+ /* Calculate output */
+ out_l2 = out_l1 * priv->wet1 + out_r1 * priv->wet2 + input_2l * priv->dry;
+ out_r2 = out_r1 * priv->wet1 + out_l1 * priv->wet2 + input_2r * priv->dry;
+ *odata++ = (gint16) CLAMP (out_l2, G_MININT16, G_MAXINT16);
+ *odata++ = (gint16) CLAMP (out_r2, G_MININT16, G_MAXINT16);
+
+ if (abs (out_l2) > 0 || abs (out_r2) > 0)
+ drained = FALSE;
+ }
+ return drained;
+}
+
+static gboolean
+gst_freeverb_transform_m2s_float (GstFreeverb * filter,
+ gfloat * idata, gfloat * odata, guint num_samples)
+{
+ GstFreeverbPrivate *priv = filter->priv;
+ gint i, k;
+ gfloat out_l1, out_r1, input_1;
+ gfloat out_l2, out_r2, input_2;
+ gboolean drained = TRUE;
+
+ for (k = 0; k < num_samples; k++) {
+
+ out_l1 = out_r1 = 0.0;
+
+ /* The original Freeverb code expects a stereo signal and 'input_1'
+ * is set to the sum of the left and right input_1 sample. Since
+ * this code works on a mono signal, 'input_1' is set to twice the
+ * input_1 sample. */
+ input_2 = *idata++;
+ input_1 = (2.0f * input_2 + DC_OFFSET) * priv->gain;
+
+ /* Accumulate comb filters in parallel */
+ for (i = 0; i < numcombs; i++) {
+ freeverb_comb_process (priv->combL[i], input_1, out_l1);
+ freeverb_comb_process (priv->combR[i], input_1, out_r1);
+ }
+ /* Feed through allpasses in series */
+ for (i = 0; i < numallpasses; i++) {
+ freeverb_allpass_process (priv->allpassL[i], out_l1);
+ freeverb_allpass_process (priv->allpassR[i], out_r1);
+ }
+
+ /* Remove the DC offset */
+ out_l1 -= DC_OFFSET;
+ out_r1 -= DC_OFFSET;
+
+ /* Calculate output */
+ out_l2 = out_l1 * priv->wet1 + out_r1 * priv->wet2 + input_2 * priv->dry;
+ out_r2 = out_r1 * priv->wet1 + out_l1 * priv->wet2 + input_2 * priv->dry;
+ *odata++ = out_l2;
+ *odata++ = out_r2;
+
+ if (fabs (out_l2) > 0 || fabs (out_r2) > 0)
+ drained = FALSE;
+ }
+ return drained;
+}
+
+static gboolean
+gst_freeverb_transform_s2s_float (GstFreeverb * filter,
+ gfloat * idata, gfloat * odata, guint num_samples)
+{
+ GstFreeverbPrivate *priv = filter->priv;
+ gint i, k;
+ gfloat out_l1, out_r1, input_1l, input_1r;
+ gfloat out_l2, out_r2, input_2l, input_2r;
+ gboolean drained = TRUE;
+
+ for (k = 0; k < num_samples; k++) {
+
+ out_l1 = out_r1 = 0.0;
+
+ input_2l = *idata++;
+ input_2r = *idata++;
+ input_1l = (input_2l + DC_OFFSET) * priv->gain;
+ input_1r = (input_2r + DC_OFFSET) * priv->gain;
+
+ /* Accumulate comb filters in parallel */
+ for (i = 0; i < numcombs; i++) {
+ freeverb_comb_process (priv->combL[i], input_1l, out_l1);
+ freeverb_comb_process (priv->combR[i], input_1r, out_r1);
+ }
+ /* Feed through allpasses in series */
+ for (i = 0; i < numallpasses; i++) {
+ freeverb_allpass_process (priv->allpassL[i], out_l1);
+ freeverb_allpass_process (priv->allpassR[i], out_r1);
+ }
+
+ /* Remove the DC offset */
+ out_l1 -= DC_OFFSET;
+ out_r1 -= DC_OFFSET;
+
+ /* Calculate output */
+ out_l2 = out_l1 * priv->wet1 + out_r1 * priv->wet2 + input_2l * priv->dry;
+ out_r2 = out_r1 * priv->wet1 + out_l1 * priv->wet2 + input_2r * priv->dry;
+ *odata++ = out_l2;
+ *odata++ = out_r2;
+
+ if (fabs (out_l2) > 0 || fabs (out_r2) > 0)
+ drained = FALSE;
+ }
+ return drained;
+}
+
+/* this function does the actual processing
+ */
+static GstFlowReturn
+gst_freeverb_transform (GstBaseTransform * base, GstBuffer * inbuf,
+ GstBuffer * outbuf)
+{
+ GstFreeverb *filter = GST_FREEVERB (base);
+ guint num_samples = GST_BUFFER_SIZE (outbuf) / (2 * filter->width);
+ GstClockTime timestamp;
+
+ timestamp = GST_BUFFER_TIMESTAMP (inbuf);
+ timestamp =
+ gst_segment_to_stream_time (&base->segment, GST_FORMAT_TIME, timestamp);
+
+ GST_DEBUG_OBJECT (filter, "processing %u samples at %" GST_TIME_FORMAT,
+ num_samples, GST_TIME_ARGS (timestamp));
+
+ if (GST_CLOCK_TIME_IS_VALID (timestamp))
+ gst_object_sync_values (G_OBJECT (filter), timestamp);
+
+ if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_DISCONT))) {
+ filter->drained = FALSE;
+ }
+ if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP))) {
+ if (filter->drained) {
+ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
+ memset (GST_BUFFER_DATA (outbuf), 0, GST_BUFFER_SIZE (outbuf));
+ return GST_FLOW_OK;
+ }
+ } else {
+ filter->drained = FALSE;
+ }
+
+ filter->drained = filter->process (filter, GST_BUFFER_DATA (inbuf),
+ GST_BUFFER_DATA (outbuf), num_samples);
+
+ if (filter->drained) {
+ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
+ }
+
+ return GST_FLOW_OK;
+}
+
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ gst_controller_init (NULL, NULL);
+
+ return gst_element_register (plugin, "freeverb",
+ GST_RANK_NONE, GST_TYPE_FREEVERB);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "freeverb",
+ "Reverberation/room effect",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
projects / platform / upstream / gstreamer.git / commitdiff