| /* GStreamer |
| * Copyright (C) 2011 Tiago Katcipis <tiagokatcipis@gmail.com> |
| * Copyright (C) 2011 Paulo Pizarro <paulo.pizarro@gmail.com> |
| * |
| * 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., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| /** |
| * SECTION:element-removesilence |
| * |
| * Removes all silence periods from an audio stream, dropping silence buffers. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 -v -m filesrc location="audiofile" ! decodebin ! removesilence remove=true ! wavenc ! filesink location=without_audio.wav |
| * ]| |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <gst/gst.h> |
| #include <gst/base/gstbasetransform.h> |
| #include <gst/audio/audio.h> |
| |
| #include "gstremovesilence.h" |
| |
| |
| GST_DEBUG_CATEGORY_STATIC (gst_remove_silence_debug); |
| #define GST_CAT_DEFAULT gst_remove_silence_debug |
| #define DEFAULT_VAD_HYSTERESIS 480 /* 60 mseg */ |
| |
| /* Filter signals and args */ |
| enum |
| { |
| /* FILL ME */ |
| LAST_SIGNAL |
| }; |
| |
| enum |
| { |
| PROP_0, |
| PROP_REMOVE, |
| PROP_HYSTERESIS |
| }; |
| |
| |
| static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("audio/x-raw, " |
| "format = (string) " GST_AUDIO_NE (S16) ", " |
| "layout = (string) interleaved, " |
| "rate = (int) [ 1, MAX ], " "channels = (int) 1")); |
| |
| static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("audio/x-raw, " |
| "format = (string) " GST_AUDIO_NE (S16) ", " |
| "layout = (string) interleaved, " |
| "rate = (int) [ 1, MAX ], " "channels = (int) 1")); |
| |
| |
| #define DEBUG_INIT(bla) \ |
| GST_DEBUG_CATEGORY_INIT (gst_remove_silence_debug, "removesilence", 0, "removesilence element") |
| |
| #define gst_remove_silence_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstRemoveSilence, gst_remove_silence, |
| GST_TYPE_BASE_TRANSFORM, DEBUG_INIT (0)); |
| |
| static void gst_remove_silence_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_remove_silence_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| |
| static GstFlowReturn gst_remove_silence_transform_ip (GstBaseTransform * base, |
| GstBuffer * buf); |
| static void gst_remove_silence_finalize (GObject * obj); |
| |
| /* GObject vmethod implementations */ |
| |
| /* initialize the removesilence's class */ |
| static void |
| gst_remove_silence_class_init (GstRemoveSilenceClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *gstelement_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| gstelement_class = (GstElementClass *) klass; |
| |
| gobject_class->finalize = gst_remove_silence_finalize; |
| gobject_class->set_property = gst_remove_silence_set_property; |
| gobject_class->get_property = gst_remove_silence_get_property; |
| |
| g_object_class_install_property (gobject_class, PROP_REMOVE, |
| g_param_spec_boolean ("remove", "Remove", |
| "Set to true to remove silence from the stream, false otherwhise", |
| FALSE, G_PARAM_READWRITE)); |
| |
| g_object_class_install_property (gobject_class, PROP_HYSTERESIS, |
| g_param_spec_uint64 ("hysteresis", |
| "Hysteresis", |
| "Set the hysteresis (on samples) used on the internal VAD", |
| 1, G_MAXUINT64, DEFAULT_VAD_HYSTERESIS, G_PARAM_READWRITE)); |
| |
| gst_element_class_set_static_metadata (gstelement_class, |
| "RemoveSilence", |
| "Filter/Effect/Audio", |
| "Removes all the silence periods from the audio stream.", |
| "Tiago Katcipis <tiagokatcipis@gmail.com>\n \ |
| Paulo Pizarro <paulo.pizarro@gmail.com>"); |
| |
| gst_element_class_add_pad_template (gstelement_class, |
| gst_static_pad_template_get (&src_template)); |
| gst_element_class_add_pad_template (gstelement_class, |
| gst_static_pad_template_get (&sink_template)); |
| |
| GST_BASE_TRANSFORM_CLASS (klass)->transform_ip = |
| GST_DEBUG_FUNCPTR (gst_remove_silence_transform_ip); |
| } |
| |
| /* initialize the new element |
| * instantiate pads and add them to element |
| * set pad calback functions |
| * initialize instance structure |
| */ |
| static void |
| gst_remove_silence_init (GstRemoveSilence * filter) |
| { |
| filter->vad = vad_new (DEFAULT_VAD_HYSTERESIS); |
| filter->remove = FALSE; |
| |
| if (!filter->vad) { |
| GST_DEBUG ("Error initializing VAD !!"); |
| return; |
| } |
| } |
| |
| static void |
| gst_remove_silence_finalize (GObject * obj) |
| { |
| GstRemoveSilence *filter = GST_REMOVE_SILENCE (obj); |
| GST_DEBUG ("Destroying VAD"); |
| vad_destroy (filter->vad); |
| filter->vad = NULL; |
| GST_DEBUG ("VAD Destroyed"); |
| G_OBJECT_CLASS (parent_class)->finalize (obj); |
| } |
| |
| static void |
| gst_remove_silence_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstRemoveSilence *filter = GST_REMOVE_SILENCE (object); |
| |
| switch (prop_id) { |
| case PROP_REMOVE: |
| filter->remove = g_value_get_boolean (value); |
| break; |
| case PROP_HYSTERESIS: |
| vad_set_hysteresis (filter->vad, g_value_get_uint64 (value)); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_remove_silence_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstRemoveSilence *filter = GST_REMOVE_SILENCE (object); |
| |
| switch (prop_id) { |
| case PROP_REMOVE: |
| g_value_set_boolean (value, filter->remove); |
| break; |
| case PROP_HYSTERESIS: |
| g_value_set_uint64 (value, vad_get_hysteresis (filter->vad)); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static GstFlowReturn |
| gst_remove_silence_transform_ip (GstBaseTransform * trans, GstBuffer * inbuf) |
| { |
| GstRemoveSilence *filter = NULL; |
| int frame_type; |
| GstMapInfo map; |
| |
| filter = GST_REMOVE_SILENCE (trans); |
| |
| gst_buffer_map (inbuf, &map, GST_MAP_READ); |
| frame_type = |
| vad_update (filter->vad, (gint16 *) map.data, map.size / sizeof (gint16)); |
| gst_buffer_unmap (inbuf, &map); |
| |
| if (frame_type == VAD_SILENCE) { |
| GST_DEBUG ("Silence detected"); |
| |
| if (filter->remove) { |
| GST_DEBUG ("Removing silence"); |
| return GST_BASE_TRANSFORM_FLOW_DROPPED; |
| } |
| |
| } |
| |
| return GST_FLOW_OK; |
| } |
| |
| /*Plugin init functions*/ |
| static gboolean |
| plugin_init (GstPlugin * plugin) |
| { |
| return gst_element_register (plugin, "removesilence", GST_RANK_NONE, |
| gst_remove_silence_get_type ()); |
| } |
| |
| GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, |
| GST_VERSION_MINOR, |
| removesilence, |
| "Removes silence from an audio stream", |
| plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN); |