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Diffstat (limited to 'gst/stereo/gststereo.c')
| -rw-r--r-- | gst/stereo/gststereo.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/gst/stereo/gststereo.c b/gst/stereo/gststereo.c deleted file mode 100644 index 95ca3526a..000000000 --- a/gst/stereo/gststereo.c +++ /dev/null @@ -1,214 +0,0 @@ -/* GStreamer - * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> - * - * 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. - */ - -/* This effect is borrowed from xmms-0.6.1, though I mangled it so badly in - * the process of copying it over that the xmms people probably won't want - * any credit for it ;-) - */ -/** - * SECTION:element-stereo - * @title: stereo - * - * Create a wide stereo effect. - * - * ## Example pipelines - * |[ - * gst-launch-1.0 -v filesrc location=sine.ogg ! oggdemux ! vorbisdec ! audioconvert ! stereo ! audioconvert ! audioresample ! alsasink - * ]| Play an Ogg/Vorbis file. - * - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif -#include "gststereo.h" - -#include <gst/gst.h> -#include <gst/base/gstbasetransform.h> -#include <gst/audio/audio.h> -#include <gst/audio/gstaudiofilter.h> - -#define ALLOWED_CAPS \ - "audio/x-raw," \ - " format = "GST_AUDIO_NE (S16) "," \ - " rate = (int) [ 1, MAX ]," \ - " channels = (int) 2" - -/* Stereo signals and args */ -enum -{ - /* FILL ME */ - LAST_SIGNAL -}; - -enum -{ - PROP_0, - PROP_ACTIVE, - PROP_STEREO -}; - -static void gst_stereo_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec); -static void gst_stereo_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec); - -static GstFlowReturn gst_stereo_transform_ip (GstBaseTransform * base, - GstBuffer * outbuf); - -G_DEFINE_TYPE (GstStereo, gst_stereo, GST_TYPE_AUDIO_FILTER); - -static void -gst_stereo_class_init (GstStereoClass * klass) -{ - GObjectClass *gobject_class = G_OBJECT_CLASS (klass); - GstElementClass *element_class = GST_ELEMENT_CLASS (klass); - GstBaseTransformClass *trans_class = GST_BASE_TRANSFORM_CLASS (klass); - GstAudioFilterClass *audiofilter_class = GST_AUDIO_FILTER_CLASS (klass); - GstCaps *caps; - - gst_element_class_set_static_metadata (element_class, "Stereo effect", - "Filter/Effect/Audio", - "Muck with the stereo signal to enhance its 'stereo-ness'", - "Erik Walthinsen <omega@cse.ogi.edu>"); - - caps = gst_caps_from_string (ALLOWED_CAPS); - gst_audio_filter_class_add_pad_templates (audiofilter_class, caps); - gst_caps_unref (caps); - - gobject_class->set_property = gst_stereo_set_property; - gobject_class->get_property = gst_stereo_get_property; - - g_object_class_install_property (gobject_class, PROP_ACTIVE, - g_param_spec_boolean ("active", "active", "active", - TRUE, - G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); - - g_object_class_install_property (gobject_class, PROP_STEREO, - g_param_spec_float ("stereo", "stereo", "stereo", - 0.0, 1.0, 0.1f, - G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); - - trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_stereo_transform_ip); -} - -static void -gst_stereo_init (GstStereo * stereo) -{ - stereo->active = TRUE; - stereo->stereo = 0.1f; -} - -static GstFlowReturn -gst_stereo_transform_ip (GstBaseTransform * base, GstBuffer * outbuf) -{ - GstStereo *stereo = GST_STEREO (base); - gint samples; - gint i; - gdouble avg, ldiff, rdiff, tmp; - gdouble mul = stereo->stereo; - gint16 *data; - GstMapInfo info; - - if (!gst_buffer_map (outbuf, &info, GST_MAP_READWRITE)) - return GST_FLOW_ERROR; - - data = (gint16 *) info.data; - samples = info.size / 2; - - if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf))) - gst_object_sync_values (GST_OBJECT (stereo), GST_BUFFER_TIMESTAMP (outbuf)); - - if (stereo->active) { - for (i = 0; i < samples / 2; i += 2) { - avg = (data[i] + data[i + 1]) / 2; - ldiff = data[i] - avg; - rdiff = data[i + 1] - avg; - - tmp = avg + ldiff * mul; - if (tmp < -32768) - tmp = -32768; - if (tmp > 32767) - tmp = 32767; - data[i] = tmp; - - tmp = avg + rdiff * mul; - if (tmp < -32768) - tmp = -32768; - if (tmp > 32767) - tmp = 32767; - data[i + 1] = tmp; - } - } - - gst_buffer_unmap (outbuf, &info); - - return GST_FLOW_OK; -} - -static void -gst_stereo_set_property (GObject * object, guint prop_id, const GValue * value, - GParamSpec * pspec) -{ - GstStereo *stereo = GST_STEREO (object); - - switch (prop_id) { - case PROP_ACTIVE: - stereo->active = g_value_get_boolean (value); - break; - case PROP_STEREO: - stereo->stereo = g_value_get_float (value) * 10.0; - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - -static void -gst_stereo_get_property (GObject * object, guint prop_id, GValue * value, - GParamSpec * pspec) -{ - GstStereo *stereo = GST_STEREO (object); - - switch (prop_id) { - case PROP_ACTIVE: - g_value_set_boolean (value, stereo->active); - break; - case PROP_STEREO: - g_value_set_float (value, stereo->stereo / 10.0); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - -static gboolean -plugin_init (GstPlugin * plugin) -{ - return gst_element_register (plugin, "stereo", GST_RANK_NONE, - GST_TYPE_STEREO); -} - -GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, - GST_VERSION_MINOR, - stereo, - "Muck with the stereo signal, enhance its 'stereo-ness'", - plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) |