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Move stereo plugin from -bad
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/457
This commit is contained in:
Tim-Philipp Müller
commit
d0a5e9d8b0
2 changed files with 269 additions and 0 deletions
214
gst/audiofx/gststereo.c
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214
gst/audiofx/gststereo.c
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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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/* This effect is borrowed from xmms-0.6.1, though I mangled it so badly in
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* the process of copying it over that the xmms people probably won't want
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* any credit for it ;-)
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*/
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/**
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* SECTION:element-stereo
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* @title: stereo
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*
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* Create a wide stereo effect.
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*
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* ## Example pipelines
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* |[
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* gst-launch-1.0 -v filesrc location=sine.ogg ! oggdemux ! vorbisdec ! audioconvert ! stereo ! audioconvert ! audioresample ! alsasink
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* ]| Play an Ogg/Vorbis file.
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*
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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 "gststereo.h"
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/audio/audio.h>
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#include <gst/audio/gstaudiofilter.h>
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#define ALLOWED_CAPS \
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"audio/x-raw," \
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" format = "GST_AUDIO_NE (S16) "," \
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" rate = (int) [ 1, MAX ]," \
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" channels = (int) 2"
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/* Stereo 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_ACTIVE,
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PROP_STEREO
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};
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static void gst_stereo_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_stereo_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_stereo_transform_ip (GstBaseTransform * base,
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GstBuffer * outbuf);
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G_DEFINE_TYPE (GstStereo, gst_stereo, GST_TYPE_AUDIO_FILTER);
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static void
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gst_stereo_class_init (GstStereoClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstBaseTransformClass *trans_class = GST_BASE_TRANSFORM_CLASS (klass);
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GstAudioFilterClass *audiofilter_class = GST_AUDIO_FILTER_CLASS (klass);
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GstCaps *caps;
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gst_element_class_set_static_metadata (element_class, "Stereo effect",
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"Filter/Effect/Audio",
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"Muck with the stereo signal to enhance its 'stereo-ness'",
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"Erik Walthinsen <omega@cse.ogi.edu>");
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caps = gst_caps_from_string (ALLOWED_CAPS);
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gst_audio_filter_class_add_pad_templates (audiofilter_class, caps);
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gst_caps_unref (caps);
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gobject_class->set_property = gst_stereo_set_property;
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gobject_class->get_property = gst_stereo_get_property;
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g_object_class_install_property (gobject_class, PROP_ACTIVE,
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g_param_spec_boolean ("active", "active", "active",
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TRUE,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_STEREO,
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g_param_spec_float ("stereo", "stereo", "stereo",
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0.0, 1.0, 0.1f,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_stereo_transform_ip);
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}
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static void
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gst_stereo_init (GstStereo * stereo)
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{
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stereo->active = TRUE;
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stereo->stereo = 0.1f;
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}
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static GstFlowReturn
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gst_stereo_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
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{
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GstStereo *stereo = GST_STEREO (base);
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gint samples;
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gint i;
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gdouble avg, ldiff, rdiff, tmp;
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gdouble mul = stereo->stereo;
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gint16 *data;
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GstMapInfo info;
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if (!gst_buffer_map (outbuf, &info, GST_MAP_READWRITE))
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return GST_FLOW_ERROR;
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data = (gint16 *) info.data;
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samples = info.size / 2;
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if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf)))
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gst_object_sync_values (GST_OBJECT (stereo), GST_BUFFER_TIMESTAMP (outbuf));
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if (stereo->active) {
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for (i = 0; i < samples / 2; i += 2) {
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avg = (data[i] + data[i + 1]) / 2;
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ldiff = data[i] - avg;
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rdiff = data[i + 1] - avg;
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tmp = avg + ldiff * mul;
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if (tmp < -32768)
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tmp = -32768;
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if (tmp > 32767)
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tmp = 32767;
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data[i] = tmp;
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tmp = avg + rdiff * mul;
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if (tmp < -32768)
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tmp = -32768;
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if (tmp > 32767)
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tmp = 32767;
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data[i + 1] = tmp;
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}
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}
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gst_buffer_unmap (outbuf, &info);
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return GST_FLOW_OK;
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}
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static void
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gst_stereo_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstStereo *stereo = GST_STEREO (object);
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switch (prop_id) {
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case PROP_ACTIVE:
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stereo->active = g_value_get_boolean (value);
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break;
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case PROP_STEREO:
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stereo->stereo = g_value_get_float (value) * 10.0;
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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_stereo_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstStereo *stereo = GST_STEREO (object);
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switch (prop_id) {
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case PROP_ACTIVE:
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g_value_set_boolean (value, stereo->active);
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break;
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case PROP_STEREO:
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g_value_set_float (value, stereo->stereo / 10.0);
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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 gboolean
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plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "stereo", GST_RANK_NONE,
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GST_TYPE_STEREO);
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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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stereo,
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"Muck with the stereo signal, enhance its 'stereo-ness'",
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plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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55
gst/audiofx/gststereo.h
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55
gst/audiofx/gststereo.h
Normal file
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@ -0,0 +1,55 @@
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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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#ifndef __GST_STEREO_H__
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#define __GST_STEREO_H__
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#include <gst/gst.h>
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#include <gst/audio/gstaudiofilter.h>
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#define GST_TYPE_STEREO \
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(gst_stereo_get_type())
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#define GST_STEREO(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_STEREO,GstStereo))
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#define GST_STEREO_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_STEREO,GstStereoClass))
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#define GST_IS_STEREO(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_STEREO))
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#define GST_IS_STEREO_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_STEREO))
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typedef struct _GstStereo GstStereo;
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typedef struct _GstStereoClass GstStereoClass;
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struct _GstStereo {
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GstAudioFilter element;
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gboolean active;
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gfloat stereo;
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};
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struct _GstStereoClass {
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GstAudioFilterClass parent_class;
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};
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GType gst_stereo_get_type(void);
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#endif /* __GST_STEREO_H__ */
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