mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-10-04 09:42:19 +00:00
removesilence: new plugin
Fixes: #597822. Signed-off-by: David Schleef <ds@schleef.org>
This commit is contained in:
parent
6c272aafa7
commit
382346a6f3
6 changed files with 528 additions and 0 deletions
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@ -345,6 +345,7 @@ AG_GST_CHECK_PLUGIN(pcapparse)
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AG_GST_CHECK_PLUGIN(pnm)
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AG_GST_CHECK_PLUGIN(pnm)
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AG_GST_CHECK_PLUGIN(rawparse)
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AG_GST_CHECK_PLUGIN(rawparse)
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AG_GST_CHECK_PLUGIN(real)
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AG_GST_CHECK_PLUGIN(real)
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AG_GST_CHECK_PLUGIN(removesilence)
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AG_GST_CHECK_PLUGIN(rtpmux)
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AG_GST_CHECK_PLUGIN(rtpmux)
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AG_GST_CHECK_PLUGIN(rtpvp8)
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AG_GST_CHECK_PLUGIN(rtpvp8)
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AG_GST_CHECK_PLUGIN(scaletempo)
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AG_GST_CHECK_PLUGIN(scaletempo)
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@ -1912,6 +1913,7 @@ gst/pcapparse/Makefile
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gst/pnm/Makefile
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gst/pnm/Makefile
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gst/rawparse/Makefile
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gst/rawparse/Makefile
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gst/real/Makefile
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gst/real/Makefile
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gst/removesilence/Makefile
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gst/rtpmux/Makefile
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gst/rtpmux/Makefile
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gst/rtpvp8/Makefile
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gst/rtpvp8/Makefile
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gst/scaletempo/Makefile
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gst/scaletempo/Makefile
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12
gst/removesilence/Makefile.am
Normal file
12
gst/removesilence/Makefile.am
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@ -0,0 +1,12 @@
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plugin_LTLIBRARIES = libgstremovesilence.la
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libgstremovesilence_la_SOURCES = gstremovesilence.c vad_private.c
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libgstremovesilence_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS)
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libgstremovesilence_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) $(GST_BASE_LIBS) $(GST_LIBS)
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libgstremovesilence_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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libgstremovesilence_la_LIBTOOLFLAGS = --tag=disable-static
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noinst_HEADERS = \
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gstremovesilence.h \
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vad_private.h
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262
gst/removesilence/gstremovesilence.c
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262
gst/removesilence/gstremovesilence.c
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@ -0,0 +1,262 @@
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/* GStreamer
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* Copyright (C) 2011 Tiago Katcipis <tiagokatcipis@gmail.com>
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* Copyright (C) 2011 Paulo Pizarro <paulo.pizarro@gmail.com>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-removesilence
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*
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* Removes all silence periods from an audio stream, dropping silence buffers.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v -m filesrc location="audiofile" ! decodebin2 ! removesilence remove=true ! wavenc ! filesink location=without_audio.wav
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* ]|
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* </refsect2>
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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 <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/controller/gstcontroller.h>
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#include "gstremovesilence.h"
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GST_DEBUG_CATEGORY_STATIC (gst_remove_silence_debug);
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#define GST_CAT_DEFAULT gst_remove_silence_debug
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#define DEFAULT_VAD_HYSTERESIS 480 /* 60 mseg */
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/* Filter 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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PROP_REMOVE,
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PROP_HYSTERESIS
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};
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static GstStaticPadTemplate sink_template = 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
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("audio/x-raw-int, "
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"rate=[1, MAX], channels=1, endianness=BYTE_ORDER, "
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"width=16, depth=16, signed=true"));
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static GstStaticPadTemplate src_template = 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
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("audio/x-raw-int, "
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"rate=[1, MAX], channels=1, endianness=BYTE_ORDER, "
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"width=16, depth=16, signed=true"));
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#define DEBUG_INIT(bla) \
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GST_DEBUG_CATEGORY_INIT (gst_remove_silence_debug, "removesilence", 0, "removesilence element")
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GST_BOILERPLATE_FULL (GstRemoveSilence, gst_remove_silence, GstBaseTransform,
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GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
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static void gst_remove_silence_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_remove_silence_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_remove_silence_transform_ip (GstBaseTransform * base,
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GstBuffer * buf);
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static void gst_remove_silence_finalize (GObject * obj);
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static void gst_remove_silence_reset (GstRemoveSilence * filter);
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/* GObject vmethod implementations */
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static void
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gst_remove_silence_base_init (gpointer gclass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
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gst_element_class_set_details_simple (element_class,
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"RemoveSilence",
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"Filter/Effect/Audio",
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"Removes all the silence periods from the audio stream.",
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"Tiago Katcipis <tiagokatcipis@gmail.com>\n \
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Paulo Pizarro <paulo.pizarro@gmail.com>");
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_template));
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}
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/* initialize the removesilence's class */
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static void
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gst_remove_silence_class_init (GstRemoveSilenceClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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gobject_class->finalize = gst_remove_silence_finalize;
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gobject_class->set_property = gst_remove_silence_set_property;
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gobject_class->get_property = gst_remove_silence_get_property;
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g_object_class_install_property (gobject_class, PROP_REMOVE,
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g_param_spec_boolean ("remove", "Remove",
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"Set to true to remove silence from the stream, false otherwhise",
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FALSE, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_HYSTERESIS,
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g_param_spec_uint64 ("hysteresis",
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"Hysteresis",
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"Set the hysteresis (on samples) used on the internal VAD",
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1, G_MAXUINT64, DEFAULT_VAD_HYSTERESIS, G_PARAM_READWRITE));
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GST_BASE_TRANSFORM_CLASS (klass)->transform_ip =
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GST_DEBUG_FUNCPTR (gst_remove_silence_transform_ip);
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}
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/* initialize the new element
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* instantiate pads and add them to element
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* set pad calback functions
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* initialize instance structure
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*/
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static void
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gst_remove_silence_init (GstRemoveSilence * filter,
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GstRemoveSilenceClass * gclass)
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{
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filter->vad = vad_new (DEFAULT_VAD_HYSTERESIS);
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filter->remove = FALSE;
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if (!filter->vad) {
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GST_DEBUG ("Error initializing VAD !!");
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return;
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}
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gst_remove_silence_reset (filter);
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}
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static void
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gst_remove_silence_reset (GstRemoveSilence * filter)
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{
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GST_DEBUG ("Reseting VAD");
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if (filter->vad) {
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vad_reset (filter->vad);
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}
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GST_DEBUG ("VAD Reseted");
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}
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static void
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gst_remove_silence_finalize (GObject * obj)
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{
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GstRemoveSilence *filter = GST_REMOVE_SILENCE (obj);
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GST_DEBUG ("Destroying VAD");
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vad_destroy (filter->vad);
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filter->vad = NULL;
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GST_DEBUG ("VAD Destroyed");
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G_OBJECT_CLASS (parent_class)->finalize (obj);
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}
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static void
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gst_remove_silence_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstRemoveSilence *filter = GST_REMOVE_SILENCE (object);
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switch (prop_id) {
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case PROP_REMOVE:
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filter->remove = g_value_get_boolean (value);
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break;
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case PROP_HYSTERESIS:
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vad_set_hysteresis (filter->vad, g_value_get_uint64 (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_remove_silence_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstRemoveSilence *filter = GST_REMOVE_SILENCE (object);
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switch (prop_id) {
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case PROP_REMOVE:
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g_value_set_boolean (value, filter->remove);
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break;
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case PROP_HYSTERESIS:
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g_value_set_uint64 (value, vad_get_hysteresis (filter->vad));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstFlowReturn
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gst_remove_silence_transform_ip (GstBaseTransform * trans, GstBuffer * inbuf)
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{
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GstRemoveSilence *filter = NULL;
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int frame_type;
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filter = GST_REMOVE_SILENCE (trans);
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frame_type =
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vad_update (filter->vad, (gint16 *) GST_BUFFER_DATA (inbuf),
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GST_BUFFER_SIZE (inbuf) / sizeof (gint16));
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if (frame_type == VAD_SILENCE) {
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GST_DEBUG ("Silence detected");
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if (filter->remove) {
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GST_DEBUG ("Removing silence");
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return GST_BASE_TRANSFORM_FLOW_DROPPED;
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}
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}
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return GST_FLOW_OK;
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}
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/*Plugin init functions*/
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "removesilence", GST_RANK_NONE,
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gst_remove_silence_get_type ());
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"removesilence",
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"Removes silence from an audio stream",
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plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
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56
gst/removesilence/gstremovesilence.h
Normal file
56
gst/removesilence/gstremovesilence.h
Normal file
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@ -0,0 +1,56 @@
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/* GStreamer
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* Copyright (C) 2011 Tiago Katcipis <tiagokatcipis@gmail.com>
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* Copyright (C) 2011 Paulo Pizarro <paulo.pizarro@gmail.com>
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*
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_REMOVE_SILENCE_H__
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#define __GST_REMOVE_SILENCE_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include "vad_private.h"
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G_BEGIN_DECLS
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#define GST_TYPE_REMOVE_SILENCE \
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(gst_remove_silence_get_type())
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#define GST_REMOVE_SILENCE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_REMOVE_SILENCE,GstRemoveSilence))
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#define GST_REMOVE_SILENCE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_REMOVE_SILENCE,GstRemoveSilenceClass))
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#define GST_IS_REMOVESILENCE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_REMOVE_SILENCE))
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#define GST_IS_REMOVESILENCE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_REMOVE_SILENCE))
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typedef struct _GstRemoveSilence {
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GstBaseTransform parent;
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VADFilter* vad;
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gboolean remove;
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} GstRemoveSilence;
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typedef struct _GstRemoveSilenceClass {
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GstBaseTransformClass parent_class;
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} GstRemoveSilenceClass;
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GType gst_remove_silence_get_type (void);
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G_END_DECLS
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#endif /* __GST_REMOVE_SILENCE_H__ */
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152
gst/removesilence/vad_private.c
Normal file
152
gst/removesilence/vad_private.c
Normal file
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@ -0,0 +1,152 @@
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/* GStreamer
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||||||
|
* Copyright (C) 2009 Tiago Katcipis <tiagokatcipis@gmail.com>
|
||||||
|
* Copyright (C) 2009 Paulo Pizarro <paulo.pizarro@gmail.com>
|
||||||
|
* Copyright (C) 2009 Rogério Santos <rogerio.santos@digitro.com.br>
|
||||||
|
*
|
||||||
|
* This library is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU Library General Public
|
||||||
|
* License as published by the Free Software Foundation; either
|
||||||
|
* version 2 of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This library is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
* Library General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU Library General Public
|
||||||
|
* License along with this library; if not, write to the
|
||||||
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||||
|
* Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <string.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <glib.h>
|
||||||
|
#include "vad_private.h"
|
||||||
|
|
||||||
|
#define VAD_POWER_ALPHA 0x0800 /* Q16 */
|
||||||
|
#define VAD_POWER_THRESHOLD 0x000010C7 /* -60 dB (square wave) */
|
||||||
|
#define VAD_ZCR_THRESHOLD 0
|
||||||
|
#define VAD_BUFFER_SIZE 256
|
||||||
|
|
||||||
|
|
||||||
|
union pgen
|
||||||
|
{
|
||||||
|
guint64 a;
|
||||||
|
gpointer v;
|
||||||
|
guint64 *l;
|
||||||
|
guchar *b;
|
||||||
|
guint16 *w;
|
||||||
|
gint16 *s;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct _cqueue_s
|
||||||
|
{
|
||||||
|
union pgen base;
|
||||||
|
union pgen tail;
|
||||||
|
union pgen head;
|
||||||
|
gint size;
|
||||||
|
};
|
||||||
|
|
||||||
|
typedef struct _cqueue_s cqueue_t;
|
||||||
|
|
||||||
|
struct _vad_s
|
||||||
|
{
|
||||||
|
gint16 vad_buffer[VAD_BUFFER_SIZE];
|
||||||
|
cqueue_t cqueue;
|
||||||
|
gint vad_state;
|
||||||
|
guint64 hysteresis;
|
||||||
|
guint64 vad_samples;
|
||||||
|
guint64 vad_power;
|
||||||
|
long vad_zcr;
|
||||||
|
};
|
||||||
|
|
||||||
|
VADFilter *
|
||||||
|
vad_new (guint64 hysteresis)
|
||||||
|
{
|
||||||
|
VADFilter *vad = malloc (sizeof (VADFilter));
|
||||||
|
vad_reset (vad);
|
||||||
|
vad->hysteresis = hysteresis;
|
||||||
|
return vad;
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
vad_reset (VADFilter * vad)
|
||||||
|
{
|
||||||
|
memset (vad, 0, sizeof (vad));
|
||||||
|
vad->cqueue.base.s = vad->vad_buffer;
|
||||||
|
vad->cqueue.tail.a = vad->cqueue.head.a = 0;
|
||||||
|
vad->cqueue.size = VAD_BUFFER_SIZE;
|
||||||
|
vad->vad_state = VAD_SILENCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
vad_destroy (VADFilter * p)
|
||||||
|
{
|
||||||
|
free (p);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
vad_set_hysteresis (struct _vad_s *p, guint64 hysteresis)
|
||||||
|
{
|
||||||
|
p->hysteresis = hysteresis;
|
||||||
|
}
|
||||||
|
|
||||||
|
guint64
|
||||||
|
vad_get_hysteresis (struct _vad_s *p)
|
||||||
|
{
|
||||||
|
return p->hysteresis;
|
||||||
|
}
|
||||||
|
|
||||||
|
gint
|
||||||
|
vad_update (struct _vad_s * p, gint16 * data, gint len)
|
||||||
|
{
|
||||||
|
guint64 tail;
|
||||||
|
gint frame_type;
|
||||||
|
gint16 sample;
|
||||||
|
gint i;
|
||||||
|
|
||||||
|
for (i = 0; i < len; i++) {
|
||||||
|
p->vad_power = VAD_POWER_ALPHA * ((data[i] * data[i] >> 14) & 0xFFFF) +
|
||||||
|
(0xFFFF - VAD_POWER_ALPHA) * (p->vad_power >> 16) +
|
||||||
|
((0xFFFF - VAD_POWER_ALPHA) * (p->vad_power & 0xFFFF) >> 16);
|
||||||
|
/* Update VAD buffer */
|
||||||
|
p->cqueue.base.s[p->cqueue.head.a] = data[i];
|
||||||
|
p->cqueue.head.a = (p->cqueue.head.a + 1) & (p->cqueue.size - 1);
|
||||||
|
if (p->cqueue.head.a == p->cqueue.tail.a)
|
||||||
|
p->cqueue.tail.a = (p->cqueue.tail.a + 1) & (p->cqueue.size - 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
tail = p->cqueue.tail.a;
|
||||||
|
p->vad_zcr = 0;
|
||||||
|
for (;;) {
|
||||||
|
sample = p->cqueue.base.s[tail];
|
||||||
|
tail = (tail + 1) & (p->cqueue.size - 1);
|
||||||
|
if (tail == p->cqueue.head.a)
|
||||||
|
break;
|
||||||
|
p->vad_zcr +=
|
||||||
|
((sample & 0x8000) != (p->cqueue.base.s[tail] & 0x8000)) ? 1 : -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
frame_type = (p->vad_power > VAD_POWER_THRESHOLD
|
||||||
|
&& p->vad_zcr < VAD_ZCR_THRESHOLD) ? VAD_VOICE : VAD_SILENCE;
|
||||||
|
|
||||||
|
if (p->vad_state != frame_type) {
|
||||||
|
/* Voice to silence transition */
|
||||||
|
if (p->vad_state == VAD_VOICE) {
|
||||||
|
p->vad_samples += len;
|
||||||
|
if (p->vad_samples >= p->hysteresis) {
|
||||||
|
p->vad_state = frame_type;
|
||||||
|
p->vad_samples = 0;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
p->vad_state = frame_type;
|
||||||
|
p->vad_samples = 0;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
p->vad_samples = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
return p->vad_state;
|
||||||
|
}
|
44
gst/removesilence/vad_private.h
Normal file
44
gst/removesilence/vad_private.h
Normal file
|
@ -0,0 +1,44 @@
|
||||||
|
/* GStreamer
|
||||||
|
* Copyright (C) 2009 Tiago Katcipis <tiagokatcipis@gmail.com>
|
||||||
|
* Copyright (C) 2009 Paulo Pizarro <paulo.pizarro@gmail.com>
|
||||||
|
* Copyright (C) 2009 Rogério Santos <rogerio.santos@digitro.com.br>
|
||||||
|
*
|
||||||
|
* This library is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU Library General Public
|
||||||
|
* License as published by the Free Software Foundation; either
|
||||||
|
* version 2 of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This library is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
* Library General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU Library General Public
|
||||||
|
* License along with this library; if not, write to the
|
||||||
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||||
|
* Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef __VAD_FILTER_H__
|
||||||
|
#define __VAD_FILTER_H__
|
||||||
|
|
||||||
|
#define VAD_SILENCE 0
|
||||||
|
#define VAD_VOICE 1
|
||||||
|
|
||||||
|
|
||||||
|
typedef struct _vad_s VADFilter;
|
||||||
|
|
||||||
|
gint vad_update(VADFilter *p, gint16 *data, gint len);
|
||||||
|
|
||||||
|
void vad_set_hysteresis(VADFilter *p, guint64 hysteresis);
|
||||||
|
|
||||||
|
guint64 vad_get_hysteresis(VADFilter *p);
|
||||||
|
|
||||||
|
VADFilter* vad_new(guint64 hysteresis);
|
||||||
|
|
||||||
|
void vad_reset(VADFilter *p);
|
||||||
|
|
||||||
|
void vad_destroy(VADFilter *p);
|
||||||
|
|
||||||
|
#endif /* __VAD_FILTER__ */
|
Loading…
Reference in a new issue