mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-30 05:31:15 +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
e89c130f1e
commit
81b452ba5d
10 changed files with 45 additions and 622 deletions
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@ -104,6 +104,8 @@ EXTRA_HFILES = \
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$(top_srcdir)/ext/opencv/gsttextoverlay.h \
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$(top_srcdir)/ext/opencv/gsttextoverlay.h \
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$(top_srcdir)/ext/rsvg/gstrsvgdec.h \
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$(top_srcdir)/ext/rsvg/gstrsvgdec.h \
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$(top_srcdir)/ext/rsvg/gstrsvgoverlay.h \
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$(top_srcdir)/ext/rsvg/gstrsvgoverlay.h \
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$(top_srcdir)/ext/spandsp/gstspanplc.h \
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$(top_srcdir)/ext/spandsp/gstdtmfdetect.h \
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$(top_srcdir)/ext/sdl/sdlaudiosink.h \
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$(top_srcdir)/ext/sdl/sdlaudiosink.h \
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$(top_srcdir)/ext/sdl/sdlvideosink.h \
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$(top_srcdir)/ext/sdl/sdlvideosink.h \
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$(top_srcdir)/ext/timidity/gsttimidity.h \
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$(top_srcdir)/ext/timidity/gsttimidity.h \
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@ -128,7 +130,6 @@ EXTRA_HFILES = \
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$(top_srcdir)/gst/dccp/gstdccpserversrc.h \
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$(top_srcdir)/gst/dccp/gstdccpserversrc.h \
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$(top_srcdir)/gst/debugutils/fpsdisplaysink.h \
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$(top_srcdir)/gst/debugutils/fpsdisplaysink.h \
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$(top_srcdir)/gst/dtmf/gstdtmfsrc.h \
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$(top_srcdir)/gst/dtmf/gstdtmfsrc.h \
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$(top_srcdir)/gst/dtmf/gstdtmfdetect.h \
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$(top_srcdir)/gst/dtmf/gstrtpdtmfsrc.h \
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$(top_srcdir)/gst/dtmf/gstrtpdtmfsrc.h \
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$(top_srcdir)/gst/dtmf/gstrtpdtmfdepay.h \
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$(top_srcdir)/gst/dtmf/gstrtpdtmfdepay.h \
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$(top_srcdir)/gst/dvdspu/gstdvdspu.h \
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$(top_srcdir)/gst/dvdspu/gstdvdspu.h \
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@ -500,6 +500,7 @@ gst_dtmf_src_plugin_init
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GstDtmfDetect
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GstDtmfDetect
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<SUBSECTION Standard>
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<SUBSECTION Standard>
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GstDtmfDetectClass
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GstDtmfDetectClass
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GstDtmfDetectPrivate
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GST_TYPE_DTMF_DETECT
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GST_TYPE_DTMF_DETECT
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GST_DTMF_DETECT
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GST_DTMF_DETECT
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GST_DTMF_DETECT_CAST
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GST_DTMF_DETECT_CAST
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@ -1,9 +1,10 @@
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plugin_LTLIBRARIES = libgstspandsp.la
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plugin_LTLIBRARIES = libgstspandsp.la
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libgstspandsp_la_SOURCES = gstspandsp.c gstspanplc.c
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libgstspandsp_la_SOURCES = gstspandsp.c gstspanplc.c gstdtmfdetect.c
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libgstspandsp_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(SPANDSP_CFLAGS)
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libgstspandsp_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(SPANDSP_CFLAGS)
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libgstspandsp_la_LIBADD = $(SPANDSP_LIBS) $(GST_PLUGINS_BASE_LIBS) $(GST_LIBS)
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libgstspandsp_la_LIBADD = $(SPANDSP_LIBS) $(GST_PLUGINS_BASE_LIBS) \
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$(GST_BASE_LIBS) $(GST_LIBS)
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libgstspandsp_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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libgstspandsp_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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libgstspandsp_la_LIBTOOLFLAGS = --tag=disable-static
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libgstspandsp_la_LIBTOOLFLAGS = --tag=disable-static
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noinst_HEADERS = gstspanplc.h
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noinst_HEADERS = gstspanplc.h gstdtmfdetect.h
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@ -98,6 +98,8 @@ enum
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PROP_0,
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PROP_0,
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};
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};
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static void gst_dtmf_detect_finalize (GObject * object);
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static gboolean gst_dtmf_detect_set_caps (GstBaseTransform * trans,
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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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GstCaps * incaps, GstCaps * outcaps);
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static GstFlowReturn gst_dtmf_detect_transform_ip (GstBaseTransform * trans,
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static GstFlowReturn gst_dtmf_detect_transform_ip (GstBaseTransform * trans,
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@ -110,14 +112,18 @@ G_DEFINE_TYPE (GstDtmfDetect, gst_dtmf_detect, GST_TYPE_BASE_TRANSFORM);
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static void
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static void
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gst_dtmf_detect_class_init (GstDtmfDetectClass * klass)
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gst_dtmf_detect_class_init (GstDtmfDetectClass * klass)
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{
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstElementClass *gstelement_class;
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GstBaseTransformClass *gstbasetransform_class;
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GstBaseTransformClass *gstbasetransform_class;
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gobject_class = G_OBJECT_CLASS (klass);
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gstelement_class = GST_ELEMENT_CLASS (klass);
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gstelement_class = GST_ELEMENT_CLASS (klass);
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gstbasetransform_class = (GstBaseTransformClass *) 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_DEBUG_CATEGORY_INIT (dtmf_detect_debug, "dtmfdetect", 0, "dtmfdetect");
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gobject_class->finalize = gst_dtmf_detect_finalize;
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gst_element_class_add_pad_template (gstelement_class,
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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_static_pad_template_get (&srctemplate));
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gst_element_class_add_pad_template (gstelement_class,
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gst_element_class_add_pad_template (gstelement_class,
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@ -143,13 +149,32 @@ gst_dtmf_detect_init (GstDtmfDetect * dtmfdetect)
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gst_base_transform_set_gap_aware (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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}
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static void
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gst_dtmf_detect_finalize (GObject * object)
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{
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GstDtmfDetect *self = GST_DTMF_DETECT (object);
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if (self->dtmf_state)
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dtmf_rx_free (self->dtmf_state);
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G_OBJECT_CLASS (gst_dtmf_detect_parent_class)->finalize (object);
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}
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static void
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gst_dtmf_detect_state_reset (GstDtmfDetect * self)
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{
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if (self->dtmf_state)
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dtmf_rx_free (self->dtmf_state);
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self->dtmf_state = dtmf_rx_init (NULL, NULL, NULL);
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}
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static gboolean
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static gboolean
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gst_dtmf_detect_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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gst_dtmf_detect_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps)
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GstCaps * outcaps)
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{
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{
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GstDtmfDetect *self = GST_DTMF_DETECT (trans);
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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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gst_dtmf_detect_state_reset (self);
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return TRUE;
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return TRUE;
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}
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}
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@ -165,15 +190,15 @@ gst_dtmf_detect_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
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GstMapInfo map;
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GstMapInfo map;
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if (GST_BUFFER_IS_DISCONT (buf))
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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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gst_dtmf_detect_state_reset (self);
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if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_GAP))
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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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return GST_FLOW_OK;
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gst_buffer_map (buf, &map, GST_MAP_READ);
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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_rx (self->dtmf_state, (gint16 *) map.data, map.size / 2);
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dtmf_count = zap_dtmf_get (&self->dtmf_state, dtmfbuf, MAX_DTMF_DIGITS);
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dtmf_count = dtmf_rx_get (self->dtmf_state, dtmfbuf, MAX_DTMF_DIGITS);
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if (dtmf_count)
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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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GST_DEBUG_OBJECT (self, "Got %d DTMF events: %s", dtmf_count, dtmfbuf);
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@ -261,7 +286,7 @@ gst_dtmf_detect_sink_event (GstBaseTransform * trans, GstEvent * event)
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switch (GST_EVENT_TYPE (event)) {
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_FLUSH_STOP:
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case GST_EVENT_FLUSH_STOP:
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zap_dtmf_detect_init (&self->dtmf_state);
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gst_dtmf_detect_state_reset (self);
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break;
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break;
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default:
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default:
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break;
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break;
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@ -28,7 +28,7 @@
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#include <gst/gst.h>
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/base/gstbasetransform.h>
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#include "tone_detect.h"
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#include <spandsp.h>
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G_BEGIN_DECLS
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G_BEGIN_DECLS
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@ -54,7 +54,7 @@ struct _GstDtmfDetect
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{
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{
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GstBaseTransform parent;
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GstBaseTransform parent;
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dtmf_detect_state_t dtmf_state;
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dtmf_rx_state_t *dtmf_state;
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};
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};
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struct _GstDtmfDetectClass
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struct _GstDtmfDetectClass
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@ -25,12 +25,14 @@
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#endif
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#endif
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#include "gstspanplc.h"
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#include "gstspanplc.h"
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#include "gstdtmfdetect.h"
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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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return gst_element_register (plugin, "spanplc",
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return gst_element_register (plugin, "spanplc",
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GST_RANK_PRIMARY, GST_TYPE_SPAN_PLC);
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GST_RANK_PRIMARY, GST_TYPE_SPAN_PLC) &&
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gst_dtmf_detect_plugin_init (plugin);
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}
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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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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@ -33,4 +28,4 @@ Android.mk: Makefile.am $(BUILT_SOURCES)
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-ldl \
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-ldl \
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-:PASSTHROUGH LOCAL_ARM_MODE:=arm \
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-:PASSTHROUGH LOCAL_ARM_MODE:=arm \
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LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \
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LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \
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> $@
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> $@
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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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@ -1,503 +0,0 @@
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/*
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* DTMF Receiver module, part of:
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* BSD Telephony Of Mexico "Zapata" Telecom Library, version 1.10 12/9/01
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*
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* Part of the "Zapata" Computer Telephony Technology.
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*
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* See http://www.bsdtelephony.com.mx
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*
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*
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* The technologies, software, hardware, designs, drawings, scheumatics, board
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* layouts and/or artwork, concepts, methodologies (including the use of all
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* of these, and that which is derived from the use of all of these), all other
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* intellectual properties contained herein, and all intellectual property
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* rights have been and shall continue to be expressly for the benefit of all
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* mankind, and are perpetually placed in the public domain, and may be used,
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* copied, and/or modified by anyone, in any manner, for any legal purpose,
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* without restriction.
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*
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* This module written by Stephen Underwood.
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*/
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/*
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tone_detect.c - General telephony tone detection, and specific
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detection of DTMF.
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Copyright (C) 2001 Steve Underwood <steveu@coppice.org>
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Despite my general liking of the GPL, I place this code in the
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public domain for the benefit of all mankind - even the slimy
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ones who might try to proprietize my work and use it to my
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detriment.
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*/
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#include <math.h>
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#include <string.h>
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#include <stdio.h>
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#include <time.h>
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#include <fcntl.h>
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#include "tone_detect.h"
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE (!FALSE)
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#endif
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//#define USE_3DNOW
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/* Basic DTMF specs:
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*
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* Minimum tone on = 40ms
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* Minimum tone off = 50ms
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* Maximum digit rate = 10 per second
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* Normal twist <= 8dB accepted
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* Reverse twist <= 4dB accepted
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* S/N >= 15dB will detect OK
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* Attenuation <= 26dB will detect OK
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* Frequency tolerance +- 1.5% will detect, +-3.5% will reject
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*/
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#define SAMPLE_RATE 8000.0
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#define DTMF_THRESHOLD 8.0e7
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#define FAX_THRESHOLD 8.0e7
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#define FAX_2ND_HARMONIC 2.0 /* 4dB */
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|
||||||
#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