mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-18 14:26:43 +00:00
dtmf/spandsp: Move dtmfdetect to use libspandsp
Remove our copy of the tone_detect.c file and use the original from libspandsp. Also move the element to the spandsp plugin.
This commit is contained in:
Olivier Crête
parent
beb3c9c9be
commit
c6dea5d09c
6 changed files with 3 additions and 961 deletions
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@ -1,21 +1,16 @@
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plugin_LTLIBRARIES = libgstdtmf.la
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plugin_LTLIBRARIES = libgstdtmf.la
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libgstdtmf_la_SOURCES = gstdtmfsrc.c \
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libgstdtmf_la_SOURCES = gstdtmfsrc.c \
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gstdtmfdetect.c \
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gstrtpdtmfsrc.c \
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gstrtpdtmfsrc.c \
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gstrtpdtmfdepay.c \
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gstrtpdtmfdepay.c \
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tone_detect.c \
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gstdtmf.c
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gstdtmf.c
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noinst_HEADERS = gstdtmfsrc.h \
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noinst_HEADERS = gstdtmfsrc.h \
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gstdtmfdetect.h \
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gstrtpdtmfsrc.h \
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gstrtpdtmfsrc.h \
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gstrtpdtmfdepay.h \
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gstrtpdtmfdepay.h \
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gstdtmfcommon.h \
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gstdtmfcommon.h
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tone_detect.h
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libgstdtmf_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS) \
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libgstdtmf_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS)
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-DEXTERN_BUF -DRTP_SUPPORT
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libgstdtmf_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) -lgstrtp-@GST_API_VERSION@ \
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libgstdtmf_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) -lgstrtp-@GST_API_VERSION@ \
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$(GST_BASE_LIBS) $(GST_LIBS) $(LIBM)
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$(GST_BASE_LIBS) $(GST_LIBS) $(LIBM)
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libgstdtmf_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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libgstdtmf_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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@ -3,7 +3,6 @@
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#include "config.h"
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#include "config.h"
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#endif
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#endif
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#include "gstdtmfdetect.h"
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#include "gstdtmfsrc.h"
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#include "gstdtmfsrc.h"
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#include "gstrtpdtmfsrc.h"
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#include "gstrtpdtmfsrc.h"
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#include "gstrtpdtmfdepay.h"
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#include "gstrtpdtmfdepay.h"
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@ -12,9 +11,6 @@
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static gboolean
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static gboolean
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plugin_init (GstPlugin * plugin)
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plugin_init (GstPlugin * plugin)
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{
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{
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if (!gst_dtmf_detect_plugin_init (plugin))
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return FALSE;
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if (!gst_dtmf_src_plugin_init (plugin))
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if (!gst_dtmf_src_plugin_init (plugin))
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return FALSE;
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return FALSE;
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@ -1,280 +0,0 @@
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/*
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* GStreamer - DTMF Detection
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*
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* Copyright 2009 Nokia Corporation
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* Copyright 2009 Collabora Ltd,
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* @author: Olivier Crete <olivier.crete@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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/**
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* SECTION:element-dtmfdetect
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* @short_description: Detects DTMF tones
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*
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* This element will detect DTMF tones and emit messages.
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*
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* The message is called <classname>"dtmf-event"</classname> and has
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* the following fields:
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* <itemizedlist>
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* <listitem>
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* <para>
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* gint <classname>type</classname> (0-1):
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* The application uses this field to specify which of the two methods
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* specified in RFC 2833 to use. The value should be 0 for tones and 1 for
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* named events. Tones are specified by their frequencies and events are
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* specfied by their number. This element can only take events as input.
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* Do not confuse with "method" which specified the output.
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* </para>
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* </listitem>
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* <listitem>
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* <para>
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* gint <classname>number</classname> (0-16):
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* The event number.
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* </para>
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* </listitem>
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* <listitem>
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* <para>
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* gint <classname>method</classname> (2):
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* This field will always been 2 (ie sound) from this element.
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* </para>
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* </listitem>
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* </itemizedlist>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstdtmfdetect.h"
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#include <string.h>
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#include <gst/audio/audio.h>
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GST_DEBUG_CATEGORY (dtmf_detect_debug);
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#define GST_CAT_DEFAULT (dtmf_detect_debug)
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static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw, "
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"format = (string) \"" GST_AUDIO_NE (S16) "\", "
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"rate = (int) 8000, " "channels = (int) 1")
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);
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static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw, "
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"format = (string) \"" GST_AUDIO_NE (S16) "\", "
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"rate = (int) 8000, " "channels = (int) 1")
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);
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/* signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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PROP_0,
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};
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static gboolean gst_dtmf_detect_set_caps (GstBaseTransform * trans,
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GstCaps * incaps, GstCaps * outcaps);
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static GstFlowReturn gst_dtmf_detect_transform_ip (GstBaseTransform * trans,
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GstBuffer * buf);
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static gboolean gst_dtmf_detect_sink_event (GstBaseTransform * trans,
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GstEvent * event);
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G_DEFINE_TYPE (GstDtmfDetect, gst_dtmf_detect, GST_TYPE_BASE_TRANSFORM);
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static void
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gst_dtmf_detect_class_init (GstDtmfDetectClass * klass)
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{
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GstElementClass *gstelement_class;
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GstBaseTransformClass *gstbasetransform_class;
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gstelement_class = GST_ELEMENT_CLASS (klass);
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gstbasetransform_class = (GstBaseTransformClass *) klass;
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GST_DEBUG_CATEGORY_INIT (dtmf_detect_debug, "dtmfdetect", 0, "dtmfdetect");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&srctemplate));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_static_metadata (gstelement_class,
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"DTMF detector element", "Filter/Analyzer/Audio",
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"This element detects DTMF tones",
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"Olivier Crete <olivier.crete@collabora.com>");
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gstbasetransform_class->set_caps =
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GST_DEBUG_FUNCPTR (gst_dtmf_detect_set_caps);
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gstbasetransform_class->transform_ip =
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GST_DEBUG_FUNCPTR (gst_dtmf_detect_transform_ip);
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gstbasetransform_class->sink_event =
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GST_DEBUG_FUNCPTR (gst_dtmf_detect_sink_event);
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}
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static void
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gst_dtmf_detect_init (GstDtmfDetect * dtmfdetect)
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{
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gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (dtmfdetect), TRUE);
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gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (dtmfdetect), TRUE);
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}
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static gboolean
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gst_dtmf_detect_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstDtmfDetect *self = GST_DTMF_DETECT (trans);
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zap_dtmf_detect_init (&self->dtmf_state);
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return TRUE;
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}
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static GstFlowReturn
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gst_dtmf_detect_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
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{
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GstDtmfDetect *self = GST_DTMF_DETECT (trans);
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gint dtmf_count;
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gchar dtmfbuf[MAX_DTMF_DIGITS] = "";
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gint i;
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GstMapInfo map;
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if (GST_BUFFER_IS_DISCONT (buf))
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zap_dtmf_detect_init (&self->dtmf_state);
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if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_GAP))
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return GST_FLOW_OK;
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gst_buffer_map (buf, &map, GST_MAP_READ);
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zap_dtmf_detect (&self->dtmf_state, (gint16 *) map.data, map.size / 2, FALSE);
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dtmf_count = zap_dtmf_get (&self->dtmf_state, dtmfbuf, MAX_DTMF_DIGITS);
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if (dtmf_count)
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GST_DEBUG_OBJECT (self, "Got %d DTMF events: %s", dtmf_count, dtmfbuf);
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else
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GST_LOG_OBJECT (self, "Got no DTMF events");
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gst_buffer_unmap (buf, &map);
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for (i = 0; i < dtmf_count; i++) {
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GstMessage *dtmf_message = NULL;
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GstStructure *structure;
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gint dtmf_payload_event;
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GST_DEBUG_OBJECT (self, "Got DTMF event %c", dtmfbuf[i]);
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switch (dtmfbuf[i]) {
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case '0':
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dtmf_payload_event = 0;
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break;
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case '1':
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dtmf_payload_event = 1;
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break;
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case '2':
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dtmf_payload_event = 2;
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break;
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case '3':
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dtmf_payload_event = 3;
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break;
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case '4':
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dtmf_payload_event = 4;
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break;
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case '5':
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dtmf_payload_event = 5;
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break;
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case '6':
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dtmf_payload_event = 6;
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break;
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case '7':
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dtmf_payload_event = 7;
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break;
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case '8':
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dtmf_payload_event = 8;
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break;
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case '9':
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dtmf_payload_event = 9;
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break;
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case '*':
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dtmf_payload_event = 10;
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break;
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case '#':
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dtmf_payload_event = 11;
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break;
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case 'A':
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dtmf_payload_event = 12;
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break;
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case 'B':
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dtmf_payload_event = 13;
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break;
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case 'C':
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dtmf_payload_event = 14;
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break;
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case 'D':
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dtmf_payload_event = 15;
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break;
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default:
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continue;
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}
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structure = gst_structure_new ("dtmf-event",
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"type", G_TYPE_INT, 1,
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"number", G_TYPE_INT, dtmf_payload_event,
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"method", G_TYPE_INT, 2, NULL);
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dtmf_message = gst_message_new_element (GST_OBJECT (self), structure);
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gst_element_post_message (GST_ELEMENT (self), dtmf_message);
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}
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return GST_FLOW_OK;
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}
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static gboolean
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gst_dtmf_detect_sink_event (GstBaseTransform * trans, GstEvent * event)
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{
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GstDtmfDetect *self = GST_DTMF_DETECT (trans);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_FLUSH_STOP:
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zap_dtmf_detect_init (&self->dtmf_state);
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break;
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default:
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break;
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}
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return GST_BASE_TRANSFORM_CLASS (gst_dtmf_detect_parent_class)->sink_event
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(trans, event);
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}
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gboolean
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gst_dtmf_detect_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "dtmfdetect",
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GST_RANK_MARGINAL, GST_TYPE_DTMF_DETECT);
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}
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@ -1,71 +0,0 @@
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/*
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* GStreamer - DTMF Detection
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*
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* Copyright 2009 Nokia Corporation
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* Copyright 2009 Collabora Ltd,
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* @author: Olivier Crete <olivier.crete@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
||||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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||||||
* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
|
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||||||
* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef __GST_DTMF_DETECT_H__
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#define __GST_DTMF_DETECT_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include "tone_detect.h"
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G_BEGIN_DECLS
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/* #define's don't like whitespacey bits */
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#define GST_TYPE_DTMF_DETECT \
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(gst_dtmf_detect_get_type())
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#define GST_DTMF_DETECT(obj) \
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||||||
(G_TYPE_CHECK_INSTANCE_CAST((obj), \
|
|
||||||
GST_TYPE_DTMF_DETECT,GstDtmfDetect))
|
|
||||||
#define GST_DTMF_DETECT_CLASS(klass) \
|
|
||||||
(G_TYPE_CHECK_CLASS_CAST((klass), \
|
|
||||||
GST_TYPE_DTMF_DETECT,GstDtmfDetectClass))
|
|
||||||
#define GST_IS_DTMF_DETECT(obj) \
|
|
||||||
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DTMF_DETECT))
|
|
||||||
#define GST_IS_DTMF_DETECT_CLASS(obj) \
|
|
||||||
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DTMF_DETECT))
|
|
||||||
|
|
||||||
typedef struct _GstDtmfDetect GstDtmfDetect;
|
|
||||||
typedef struct _GstDtmfDetectClass GstDtmfDetectClass;
|
|
||||||
typedef struct _GstDtmfDetectPrivate GstDtmfDetectPrivate;
|
|
||||||
|
|
||||||
struct _GstDtmfDetect
|
|
||||||
{
|
|
||||||
GstBaseTransform parent;
|
|
||||||
|
|
||||||
dtmf_detect_state_t dtmf_state;
|
|
||||||
};
|
|
||||||
|
|
||||||
struct _GstDtmfDetectClass
|
|
||||||
{
|
|
||||||
GstBaseTransformClass parent_class;
|
|
||||||
};
|
|
||||||
|
|
||||||
GType gst_dtmf_detect_get_type (void);
|
|
||||||
|
|
||||||
gboolean gst_dtmf_detect_plugin_init (GstPlugin *plugin);
|
|
||||||
|
|
||||||
G_END_DECLS
|
|
||||||
|
|
||||||
#endif /* __GST_DTMF_DETECT_H__ */
|
|
||||||
|
|
@ -1,503 +0,0 @@
|
||||||
/*
|
|
||||||
* DTMF Receiver module, part of:
|
|
||||||
* BSD Telephony Of Mexico "Zapata" Telecom Library, version 1.10 12/9/01
|
|
||||||
*
|
|
||||||
* Part of the "Zapata" Computer Telephony Technology.
|
|
||||||
*
|
|
||||||
* See http://www.bsdtelephony.com.mx
|
|
||||||
*
|
|
||||||
*
|
|
||||||
* The technologies, software, hardware, designs, drawings, scheumatics, board
|
|
||||||
* layouts and/or artwork, concepts, methodologies (including the use of all
|
|
||||||
* of these, and that which is derived from the use of all of these), all other
|
|
||||||
* intellectual properties contained herein, and all intellectual property
|
|
||||||
* rights have been and shall continue to be expressly for the benefit of all
|
|
||||||
* mankind, and are perpetually placed in the public domain, and may be used,
|
|
||||||
* copied, and/or modified by anyone, in any manner, for any legal purpose,
|
|
||||||
* without restriction.
|
|
||||||
*
|
|
||||||
* This module written by Stephen Underwood.
|
|
||||||
*/
|
|
||||||
|
|
||||||
/*
|
|
||||||
tone_detect.c - General telephony tone detection, and specific
|
|
||||||
detection of DTMF.
|
|
||||||
|
|
||||||
Copyright (C) 2001 Steve Underwood <steveu@coppice.org>
|
|
||||||
|
|
||||||
Despite my general liking of the GPL, I place this code in the
|
|
||||||
public domain for the benefit of all mankind - even the slimy
|
|
||||||
ones who might try to proprietize my work and use it to my
|
|
||||||
detriment.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <math.h>
|
|
||||||
#include <string.h>
|
|
||||||
#include <stdio.h>
|
|
||||||
#include <time.h>
|
|
||||||
#include <fcntl.h>
|
|
||||||
#include "tone_detect.h"
|
|
||||||
|
|
||||||
#ifndef FALSE
|
|
||||||
#define FALSE 0
|
|
||||||
#endif
|
|
||||||
#ifndef TRUE
|
|
||||||
#define TRUE (!FALSE)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
//#define USE_3DNOW
|
|
||||||
|
|
||||||
/* Basic DTMF specs:
|
|
||||||
*
|
|
||||||
* Minimum tone on = 40ms
|
|
||||||
* Minimum tone off = 50ms
|
|
||||||
* Maximum digit rate = 10 per second
|
|
||||||
* Normal twist <= 8dB accepted
|
|
||||||
* Reverse twist <= 4dB accepted
|
|
||||||
* S/N >= 15dB will detect OK
|
|
||||||
* Attenuation <= 26dB will detect OK
|
|
||||||
* Frequency tolerance +- 1.5% will detect, +-3.5% will reject
|
|
||||||
*/
|
|
||||||
|
|
||||||
#define SAMPLE_RATE 8000.0
|
|
||||||
|
|
||||||
#define DTMF_THRESHOLD 8.0e7
|
|
||||||
#define FAX_THRESHOLD 8.0e7
|
|
||||||
#define FAX_2ND_HARMONIC 2.0 /* 4dB */
|
|
||||||
#define DTMF_NORMAL_TWIST 6.3 /* 8dB */
|
|
||||||
#define DTMF_REVERSE_TWIST ((isradio) ? 4.0 : 2.5) /* 4dB normal */
|
|
||||||
#define DTMF_RELATIVE_PEAK_ROW 6.3 /* 8dB */
|
|
||||||
#define DTMF_RELATIVE_PEAK_COL 6.3 /* 8dB */
|
|
||||||
#define DTMF_2ND_HARMONIC_ROW ((isradio) ? 1.7 : 2.5) /* 4dB normal */
|
|
||||||
#define DTMF_2ND_HARMONIC_COL 63.1 /* 18dB */
|
|
||||||
|
|
||||||
static tone_detection_descriptor_t dtmf_detect_row[4];
|
|
||||||
static tone_detection_descriptor_t dtmf_detect_col[4];
|
|
||||||
static tone_detection_descriptor_t dtmf_detect_row_2nd[4];
|
|
||||||
static tone_detection_descriptor_t dtmf_detect_col_2nd[4];
|
|
||||||
static tone_detection_descriptor_t fax_detect;
|
|
||||||
static tone_detection_descriptor_t fax_detect_2nd;
|
|
||||||
|
|
||||||
static float dtmf_row[] = {
|
|
||||||
697.0, 770.0, 852.0, 941.0
|
|
||||||
};
|
|
||||||
|
|
||||||
static float dtmf_col[] = {
|
|
||||||
1209.0, 1336.0, 1477.0, 1633.0
|
|
||||||
};
|
|
||||||
|
|
||||||
static float fax_freq = 1100.0;
|
|
||||||
|
|
||||||
static char dtmf_positions[] = "123A" "456B" "789C" "*0#D";
|
|
||||||
|
|
||||||
static void
|
|
||||||
goertzel_init (goertzel_state_t * s, tone_detection_descriptor_t * t)
|
|
||||||
{
|
|
||||||
s->v2 = s->v3 = 0.0;
|
|
||||||
s->fac = t->fac;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*- End of function --------------------------------------------------------*/
|
|
||||||
|
|
||||||
#if defined(USE_3DNOW)
|
|
||||||
static inline void
|
|
||||||
_dtmf_goertzel_update (goertzel_state_t * s, float x[], int samples)
|
|
||||||
{
|
|
||||||
int n;
|
|
||||||
float v;
|
|
||||||
int i;
|
|
||||||
float vv[16];
|
|
||||||
|
|
||||||
vv[4] = s[0].v2;
|
|
||||||
vv[5] = s[1].v2;
|
|
||||||
vv[6] = s[2].v2;
|
|
||||||
vv[7] = s[3].v2;
|
|
||||||
vv[8] = s[0].v3;
|
|
||||||
vv[9] = s[1].v3;
|
|
||||||
vv[10] = s[2].v3;
|
|
||||||
vv[11] = s[3].v3;
|
|
||||||
vv[12] = s[0].fac;
|
|
||||||
vv[13] = s[1].fac;
|
|
||||||
vv[14] = s[2].fac;
|
|
||||||
vv[15] = s[3].fac;
|
|
||||||
|
|
||||||
//v1 = s->v2;
|
|
||||||
//s->v2 = s->v3;
|
|
||||||
//s->v3 = s->fac*s->v2 - v1 + x[0];
|
|
||||||
|
|
||||||
__asm__ __volatile__ (" femms;\n"
|
|
||||||
" movq 16(%%edx),%%mm2;\n"
|
|
||||||
" movq 24(%%edx),%%mm3;\n"
|
|
||||||
" movq 32(%%edx),%%mm4;\n"
|
|
||||||
" movq 40(%%edx),%%mm5;\n"
|
|
||||||
" movq 48(%%edx),%%mm6;\n"
|
|
||||||
" movq 56(%%edx),%%mm7;\n"
|
|
||||||
" jmp 1f;\n"
|
|
||||||
" .align 32;\n"
|
|
||||||
" 1: ;\n"
|
|
||||||
" prefetch (%%eax);\n"
|
|
||||||
" movq %%mm3,%%mm1;\n"
|
|
||||||
" movq %%mm2,%%mm0;\n"
|
|
||||||
" movq %%mm5,%%mm3;\n"
|
|
||||||
" movq %%mm4,%%mm2;\n"
|
|
||||||
" pfmul %%mm7,%%mm5;\n"
|
|
||||||
" pfmul %%mm6,%%mm4;\n"
|
|
||||||
" pfsub %%mm1,%%mm5;\n"
|
|
||||||
" pfsub %%mm0,%%mm4;\n"
|
|
||||||
" movq (%%eax),%%mm0;\n"
|
|
||||||
" movq %%mm0,%%mm1;\n"
|
|
||||||
" punpckldq %%mm0,%%mm1;\n"
|
|
||||||
" add $4,%%eax;\n"
|
|
||||||
" pfadd %%mm1,%%mm5;\n"
|
|
||||||
" pfadd %%mm1,%%mm4;\n"
|
|
||||||
" dec %%ecx;\n"
|
|
||||||
" jnz 1b;\n"
|
|
||||||
" movq %%mm2,16(%%edx);\n"
|
|
||||||
" movq %%mm3,24(%%edx);\n"
|
|
||||||
" movq %%mm4,32(%%edx);\n"
|
|
||||||
" movq %%mm5,40(%%edx);\n"
|
|
||||||
" femms;\n"::"c" (samples), "a" (x), "d" (vv)
|
|
||||||
:"memory", "eax", "ecx");
|
|
||||||
|
|
||||||
s[0].v2 = vv[4];
|
|
||||||
s[1].v2 = vv[5];
|
|
||||||
s[2].v2 = vv[6];
|
|
||||||
s[3].v2 = vv[7];
|
|
||||||
s[0].v3 = vv[8];
|
|
||||||
s[1].v3 = vv[9];
|
|
||||||
s[2].v3 = vv[10];
|
|
||||||
s[3].v3 = vv[11];
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
/*- End of function --------------------------------------------------------*/
|
|
||||||
|
|
||||||
void
|
|
||||||
zap_goertzel_update (goertzel_state_t * s, int16_t x[], int samples)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
float v1;
|
|
||||||
|
|
||||||
for (i = 0; i < samples; i++) {
|
|
||||||
v1 = s->v2;
|
|
||||||
s->v2 = s->v3;
|
|
||||||
s->v3 = s->fac * s->v2 - v1 + x[i];
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/*- End of function --------------------------------------------------------*/
|
|
||||||
|
|
||||||
float
|
|
||||||
zap_goertzel_result (goertzel_state_t * s)
|
|
||||||
{
|
|
||||||
return s->v3 * s->v3 + s->v2 * s->v2 - s->v2 * s->v3 * s->fac;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*- End of function --------------------------------------------------------*/
|
|
||||||
|
|
||||||
void
|
|
||||||
zap_dtmf_detect_init (dtmf_detect_state_t * s)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
float theta;
|
|
||||||
|
|
||||||
s->hit1 = s->hit2 = 0;
|
|
||||||
|
|
||||||
for (i = 0; i < 4; i++) {
|
|
||||||
theta = 2.0 * G_PI * (dtmf_row[i] / SAMPLE_RATE);
|
|
||||||
dtmf_detect_row[i].fac = 2.0 * cos (theta);
|
|
||||||
|
|
||||||
theta = 2.0 * G_PI * (dtmf_col[i] / SAMPLE_RATE);
|
|
||||||
dtmf_detect_col[i].fac = 2.0 * cos (theta);
|
|
||||||
|
|
||||||
theta = 2.0 * G_PI * (dtmf_row[i] * 2.0 / SAMPLE_RATE);
|
|
||||||
dtmf_detect_row_2nd[i].fac = 2.0 * cos (theta);
|
|
||||||
|
|
||||||
theta = 2.0 * G_PI * (dtmf_col[i] * 2.0 / SAMPLE_RATE);
|
|
||||||
dtmf_detect_col_2nd[i].fac = 2.0 * cos (theta);
|
|
||||||
|
|
||||||
goertzel_init (&s->row_out[i], &dtmf_detect_row[i]);
|
|
||||||
goertzel_init (&s->col_out[i], &dtmf_detect_col[i]);
|
|
||||||
goertzel_init (&s->row_out2nd[i], &dtmf_detect_row_2nd[i]);
|
|
||||||
goertzel_init (&s->col_out2nd[i], &dtmf_detect_col_2nd[i]);
|
|
||||||
|
|
||||||
s->energy = 0.0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Same for the fax dector */
|
|
||||||
theta = 2.0 * G_PI * (fax_freq / SAMPLE_RATE);
|
|
||||||
fax_detect.fac = 2.0 * cos (theta);
|
|
||||||
goertzel_init (&s->fax_tone, &fax_detect);
|
|
||||||
|
|
||||||
/* Same for the fax dector 2nd harmonic */
|
|
||||||
theta = 2.0 * G_PI * (fax_freq * 2.0 / SAMPLE_RATE);
|
|
||||||
fax_detect_2nd.fac = 2.0 * cos (theta);
|
|
||||||
goertzel_init (&s->fax_tone2nd, &fax_detect_2nd);
|
|
||||||
|
|
||||||
s->current_sample = 0;
|
|
||||||
s->detected_digits = 0;
|
|
||||||
s->lost_digits = 0;
|
|
||||||
s->digits[0] = '\0';
|
|
||||||
s->mhit = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*- End of function --------------------------------------------------------*/
|
|
||||||
|
|
||||||
int
|
|
||||||
zap_dtmf_detect (dtmf_detect_state_t * s,
|
|
||||||
int16_t amp[], int samples, int isradio)
|
|
||||||
{
|
|
||||||
|
|
||||||
float row_energy[4];
|
|
||||||
float col_energy[4];
|
|
||||||
float fax_energy;
|
|
||||||
float fax_energy_2nd;
|
|
||||||
float famp;
|
|
||||||
float v1;
|
|
||||||
int i;
|
|
||||||
int j;
|
|
||||||
int sample;
|
|
||||||
int best_row;
|
|
||||||
int best_col;
|
|
||||||
int hit;
|
|
||||||
int limit;
|
|
||||||
|
|
||||||
hit = 0;
|
|
||||||
for (sample = 0; sample < samples; sample = limit) {
|
|
||||||
/* 102 is optimised to meet the DTMF specs. */
|
|
||||||
if ((samples - sample) >= (102 - s->current_sample))
|
|
||||||
limit = sample + (102 - s->current_sample);
|
|
||||||
else
|
|
||||||
limit = samples;
|
|
||||||
#if defined(USE_3DNOW)
|
|
||||||
_dtmf_goertzel_update (s->row_out, amp + sample, limit - sample);
|
|
||||||
_dtmf_goertzel_update (s->col_out, amp + sample, limit - sample);
|
|
||||||
_dtmf_goertzel_update (s->row_out2nd, amp + sample, limit2 - sample);
|
|
||||||
_dtmf_goertzel_update (s->col_out2nd, amp + sample, limit2 - sample);
|
|
||||||
/* XXX Need to fax detect for 3dnow too XXX */
|
|
||||||
#warning "Fax Support Broken"
|
|
||||||
#else
|
|
||||||
/* The following unrolled loop takes only 35% (rough estimate) of the
|
|
||||||
time of a rolled loop on the machine on which it was developed */
|
|
||||||
for (j = sample; j < limit; j++) {
|
|
||||||
famp = amp[j];
|
|
||||||
|
|
||||||
s->energy += famp * famp;
|
|
||||||
|
|
||||||
/* With GCC 2.95, the following unrolled code seems to take about 35%
|
|
||||||
(rough estimate) as long as a neat little 0-3 loop */
|
|
||||||
v1 = s->row_out[0].v2;
|
|
||||||
s->row_out[0].v2 = s->row_out[0].v3;
|
|
||||||
s->row_out[0].v3 = s->row_out[0].fac * s->row_out[0].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->col_out[0].v2;
|
|
||||||
s->col_out[0].v2 = s->col_out[0].v3;
|
|
||||||
s->col_out[0].v3 = s->col_out[0].fac * s->col_out[0].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->row_out[1].v2;
|
|
||||||
s->row_out[1].v2 = s->row_out[1].v3;
|
|
||||||
s->row_out[1].v3 = s->row_out[1].fac * s->row_out[1].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->col_out[1].v2;
|
|
||||||
s->col_out[1].v2 = s->col_out[1].v3;
|
|
||||||
s->col_out[1].v3 = s->col_out[1].fac * s->col_out[1].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->row_out[2].v2;
|
|
||||||
s->row_out[2].v2 = s->row_out[2].v3;
|
|
||||||
s->row_out[2].v3 = s->row_out[2].fac * s->row_out[2].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->col_out[2].v2;
|
|
||||||
s->col_out[2].v2 = s->col_out[2].v3;
|
|
||||||
s->col_out[2].v3 = s->col_out[2].fac * s->col_out[2].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->row_out[3].v2;
|
|
||||||
s->row_out[3].v2 = s->row_out[3].v3;
|
|
||||||
s->row_out[3].v3 = s->row_out[3].fac * s->row_out[3].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->col_out[3].v2;
|
|
||||||
s->col_out[3].v2 = s->col_out[3].v3;
|
|
||||||
s->col_out[3].v3 = s->col_out[3].fac * s->col_out[3].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->col_out2nd[0].v2;
|
|
||||||
s->col_out2nd[0].v2 = s->col_out2nd[0].v3;
|
|
||||||
s->col_out2nd[0].v3 =
|
|
||||||
s->col_out2nd[0].fac * s->col_out2nd[0].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->row_out2nd[0].v2;
|
|
||||||
s->row_out2nd[0].v2 = s->row_out2nd[0].v3;
|
|
||||||
s->row_out2nd[0].v3 =
|
|
||||||
s->row_out2nd[0].fac * s->row_out2nd[0].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->col_out2nd[1].v2;
|
|
||||||
s->col_out2nd[1].v2 = s->col_out2nd[1].v3;
|
|
||||||
s->col_out2nd[1].v3 =
|
|
||||||
s->col_out2nd[1].fac * s->col_out2nd[1].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->row_out2nd[1].v2;
|
|
||||||
s->row_out2nd[1].v2 = s->row_out2nd[1].v3;
|
|
||||||
s->row_out2nd[1].v3 =
|
|
||||||
s->row_out2nd[1].fac * s->row_out2nd[1].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->col_out2nd[2].v2;
|
|
||||||
s->col_out2nd[2].v2 = s->col_out2nd[2].v3;
|
|
||||||
s->col_out2nd[2].v3 =
|
|
||||||
s->col_out2nd[2].fac * s->col_out2nd[2].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->row_out2nd[2].v2;
|
|
||||||
s->row_out2nd[2].v2 = s->row_out2nd[2].v3;
|
|
||||||
s->row_out2nd[2].v3 =
|
|
||||||
s->row_out2nd[2].fac * s->row_out2nd[2].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->col_out2nd[3].v2;
|
|
||||||
s->col_out2nd[3].v2 = s->col_out2nd[3].v3;
|
|
||||||
s->col_out2nd[3].v3 =
|
|
||||||
s->col_out2nd[3].fac * s->col_out2nd[3].v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->row_out2nd[3].v2;
|
|
||||||
s->row_out2nd[3].v2 = s->row_out2nd[3].v3;
|
|
||||||
s->row_out2nd[3].v3 =
|
|
||||||
s->row_out2nd[3].fac * s->row_out2nd[3].v2 - v1 + famp;
|
|
||||||
|
|
||||||
/* Update fax tone */
|
|
||||||
v1 = s->fax_tone.v2;
|
|
||||||
s->fax_tone.v2 = s->fax_tone.v3;
|
|
||||||
s->fax_tone.v3 = s->fax_tone.fac * s->fax_tone.v2 - v1 + famp;
|
|
||||||
|
|
||||||
v1 = s->fax_tone.v2;
|
|
||||||
s->fax_tone2nd.v2 = s->fax_tone2nd.v3;
|
|
||||||
s->fax_tone2nd.v3 = s->fax_tone2nd.fac * s->fax_tone2nd.v2 - v1 + famp;
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
s->current_sample += (limit - sample);
|
|
||||||
if (s->current_sample < 102)
|
|
||||||
continue;
|
|
||||||
|
|
||||||
/* Detect the fax energy, too */
|
|
||||||
fax_energy = zap_goertzel_result (&s->fax_tone);
|
|
||||||
|
|
||||||
/* We are at the end of a DTMF detection block */
|
|
||||||
/* Find the peak row and the peak column */
|
|
||||||
row_energy[0] = zap_goertzel_result (&s->row_out[0]);
|
|
||||||
col_energy[0] = zap_goertzel_result (&s->col_out[0]);
|
|
||||||
|
|
||||||
for (best_row = best_col = 0, i = 1; i < 4; i++) {
|
|
||||||
row_energy[i] = zap_goertzel_result (&s->row_out[i]);
|
|
||||||
if (row_energy[i] > row_energy[best_row])
|
|
||||||
best_row = i;
|
|
||||||
col_energy[i] = zap_goertzel_result (&s->col_out[i]);
|
|
||||||
if (col_energy[i] > col_energy[best_col])
|
|
||||||
best_col = i;
|
|
||||||
}
|
|
||||||
hit = 0;
|
|
||||||
/* Basic signal level test and the twist test */
|
|
||||||
if (row_energy[best_row] >= DTMF_THRESHOLD
|
|
||||||
&&
|
|
||||||
col_energy[best_col] >= DTMF_THRESHOLD
|
|
||||||
&&
|
|
||||||
col_energy[best_col] < row_energy[best_row] * DTMF_REVERSE_TWIST
|
|
||||||
&& col_energy[best_col] * DTMF_NORMAL_TWIST > row_energy[best_row]) {
|
|
||||||
/* Relative peak test */
|
|
||||||
for (i = 0; i < 4; i++) {
|
|
||||||
if ((i != best_col
|
|
||||||
&& col_energy[i] * DTMF_RELATIVE_PEAK_COL >
|
|
||||||
col_energy[best_col])
|
|
||||||
|| (i != best_row
|
|
||||||
&& row_energy[i] * DTMF_RELATIVE_PEAK_ROW >
|
|
||||||
row_energy[best_row])) {
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
/* ... and second harmonic test */
|
|
||||||
if (i >= 4
|
|
||||||
&&
|
|
||||||
(row_energy[best_row] + col_energy[best_col]) > 42.0 * s->energy
|
|
||||||
&&
|
|
||||||
zap_goertzel_result (&s->col_out2nd[best_col]) *
|
|
||||||
DTMF_2ND_HARMONIC_COL < col_energy[best_col]
|
|
||||||
&& zap_goertzel_result (&s->row_out2nd[best_row]) *
|
|
||||||
DTMF_2ND_HARMONIC_ROW < row_energy[best_row]) {
|
|
||||||
hit = dtmf_positions[(best_row << 2) + best_col];
|
|
||||||
/* Look for two successive similar results */
|
|
||||||
/* The logic in the next test is:
|
|
||||||
We need two successive identical clean detects, with
|
|
||||||
something different preceeding it. This can work with
|
|
||||||
back to back differing digits. More importantly, it
|
|
||||||
can work with nasty phones that give a very wobbly start
|
|
||||||
to a digit. */
|
|
||||||
if (hit == s->hit3 && s->hit3 != s->hit2) {
|
|
||||||
s->mhit = hit;
|
|
||||||
s->digit_hits[(best_row << 2) + best_col]++;
|
|
||||||
s->detected_digits++;
|
|
||||||
if (s->current_digits < MAX_DTMF_DIGITS) {
|
|
||||||
s->digits[s->current_digits++] = hit;
|
|
||||||
s->digits[s->current_digits] = '\0';
|
|
||||||
} else {
|
|
||||||
s->lost_digits++;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
if (!hit && (fax_energy >= FAX_THRESHOLD)
|
|
||||||
&& (fax_energy > s->energy * 21.0)) {
|
|
||||||
fax_energy_2nd = zap_goertzel_result (&s->fax_tone2nd);
|
|
||||||
if (fax_energy_2nd * FAX_2ND_HARMONIC < fax_energy) {
|
|
||||||
#if 0
|
|
||||||
printf ("Fax energy/Second Harmonic: %f/%f\n", fax_energy,
|
|
||||||
fax_energy_2nd);
|
|
||||||
#endif
|
|
||||||
/* XXX Probably need better checking than just this the energy XXX */
|
|
||||||
hit = 'f';
|
|
||||||
s->fax_hits++;
|
|
||||||
} /* Don't reset fax hits counter */
|
|
||||||
} else {
|
|
||||||
if (s->fax_hits > 5) {
|
|
||||||
s->mhit = 'f';
|
|
||||||
s->detected_digits++;
|
|
||||||
if (s->current_digits < MAX_DTMF_DIGITS) {
|
|
||||||
s->digits[s->current_digits++] = hit;
|
|
||||||
s->digits[s->current_digits] = '\0';
|
|
||||||
} else {
|
|
||||||
s->lost_digits++;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
s->fax_hits = 0;
|
|
||||||
}
|
|
||||||
s->hit1 = s->hit2;
|
|
||||||
s->hit2 = s->hit3;
|
|
||||||
s->hit3 = hit;
|
|
||||||
/* Reinitialise the detector for the next block */
|
|
||||||
for (i = 0; i < 4; i++) {
|
|
||||||
goertzel_init (&s->row_out[i], &dtmf_detect_row[i]);
|
|
||||||
goertzel_init (&s->col_out[i], &dtmf_detect_col[i]);
|
|
||||||
goertzel_init (&s->row_out2nd[i], &dtmf_detect_row_2nd[i]);
|
|
||||||
goertzel_init (&s->col_out2nd[i], &dtmf_detect_col_2nd[i]);
|
|
||||||
}
|
|
||||||
goertzel_init (&s->fax_tone, &fax_detect);
|
|
||||||
goertzel_init (&s->fax_tone2nd, &fax_detect_2nd);
|
|
||||||
s->energy = 0.0;
|
|
||||||
s->current_sample = 0;
|
|
||||||
}
|
|
||||||
if ((!s->mhit) || (s->mhit != hit)) {
|
|
||||||
s->mhit = 0;
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
return (hit);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*- End of function --------------------------------------------------------*/
|
|
||||||
|
|
||||||
int
|
|
||||||
zap_dtmf_get (dtmf_detect_state_t * s, char *buf, int max)
|
|
||||||
{
|
|
||||||
if (max > s->current_digits)
|
|
||||||
max = s->current_digits;
|
|
||||||
if (max > 0) {
|
|
||||||
memcpy (buf, s->digits, max);
|
|
||||||
memmove (s->digits, s->digits + max, s->current_digits - max);
|
|
||||||
s->current_digits -= max;
|
|
||||||
}
|
|
||||||
buf[max] = '\0';
|
|
||||||
return max;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*- End of function --------------------------------------------------------*/
|
|
||||||
/*- End of file ------------------------------------------------------------*/
|
|
||||||
|
|
@ -1,95 +0,0 @@
|
||||||
/*
|
|
||||||
* Header file for DTMF Receiver module, part of:
|
|
||||||
* BSD Telephony Of Mexico "Zapata" Telecom Library, version 1.10 12/9/01
|
|
||||||
*
|
|
||||||
* Part of the "Zapata" Computer Telephony Technology.
|
|
||||||
*
|
|
||||||
* See http://www.bsdtelephony.com.mx
|
|
||||||
*
|
|
||||||
*
|
|
||||||
* The technologies, software, hardware, designs, drawings, scheumatics, board
|
|
||||||
* layouts and/or artwork, concepts, methodologies (including the use of all
|
|
||||||
* of these, and that which is derived from the use of all of these), all other
|
|
||||||
* intellectual properties contained herein, and all intellectual property
|
|
||||||
* rights have been and shall continue to be expressly for the benefit of all
|
|
||||||
* mankind, and are perpetually placed in the public domain, and may be used,
|
|
||||||
* copied, and/or modified by anyone, in any manner, for any legal purpose,
|
|
||||||
* without restriction.
|
|
||||||
*
|
|
||||||
* This module written by Stephen Underwood.
|
|
||||||
*/
|
|
||||||
/*
|
|
||||||
tone_detect.h - General telephony tone detection, and specific
|
|
||||||
detection of DTMF.
|
|
||||||
|
|
||||||
Copyright (C) 2001 Steve Underwood <steveu@coppice.org>
|
|
||||||
|
|
||||||
Despite my general liking of the GPL, I place this code in the
|
|
||||||
public domain for the benefit of all mankind - even the slimy
|
|
||||||
ones who might try to proprietize my work and use it to my
|
|
||||||
detriment.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef __TONE_DETECT_H__
|
|
||||||
#define __TONE_DETECT_H__
|
|
||||||
|
|
||||||
#include "_stdint.h"
|
|
||||||
|
|
||||||
#include <glib.h>
|
|
||||||
|
|
||||||
typedef struct
|
|
||||||
{
|
|
||||||
float v2;
|
|
||||||
float v3;
|
|
||||||
float fac;
|
|
||||||
} goertzel_state_t;
|
|
||||||
|
|
||||||
#define MAX_DTMF_DIGITS 128
|
|
||||||
|
|
||||||
typedef struct
|
|
||||||
{
|
|
||||||
int hit1;
|
|
||||||
int hit2;
|
|
||||||
int hit3;
|
|
||||||
int hit4;
|
|
||||||
int mhit;
|
|
||||||
|
|
||||||
goertzel_state_t row_out[4];
|
|
||||||
goertzel_state_t col_out[4];
|
|
||||||
goertzel_state_t row_out2nd[4];
|
|
||||||
goertzel_state_t col_out2nd[4];
|
|
||||||
goertzel_state_t fax_tone;
|
|
||||||
goertzel_state_t fax_tone2nd;
|
|
||||||
float energy;
|
|
||||||
|
|
||||||
int current_sample;
|
|
||||||
char digits[MAX_DTMF_DIGITS + 1];
|
|
||||||
int current_digits;
|
|
||||||
int detected_digits;
|
|
||||||
int lost_digits;
|
|
||||||
int digit_hits[16];
|
|
||||||
int fax_hits;
|
|
||||||
} dtmf_detect_state_t;
|
|
||||||
|
|
||||||
typedef struct
|
|
||||||
{
|
|
||||||
float fac;
|
|
||||||
} tone_detection_descriptor_t;
|
|
||||||
|
|
||||||
void zap_goertzel_update(goertzel_state_t *s,
|
|
||||||
gint16 x[],
|
|
||||||
int samples);
|
|
||||||
float zap_goertzel_result (goertzel_state_t *s);
|
|
||||||
|
|
||||||
void zap_dtmf_detect_init (dtmf_detect_state_t *s);
|
|
||||||
int zap_dtmf_detect (dtmf_detect_state_t *s,
|
|
||||||
gint16 amp[],
|
|
||||||
int samples,
|
|
||||||
int isradio);
|
|
||||||
int zap_dtmf_get (dtmf_detect_state_t *s,
|
|
||||||
char *buf,
|
|
||||||
int max);
|
|
||||||
|
|
||||||
#endif /* __TONE_DETECT_H__ */
|
|
||||||
|
|
||||||
/*- End of file ------------------------------------------------------------*/
|
|
||||||
Loading…
Reference in a new issue